66results about How to "Same concentration" patented technology

The present invention relates to a fuel cell based on the in-plate counter-flow flow field and belongs to the technical field of fuel cell. The air flow field plate of the cell unit is provided with two pairs of air ports, two groups of air flow channels with are distributed separately with each other and two groups of air through-holes which pass through the air flow field plate thereby forming the inner counter-flow flow field of the air plate. The air flow field plate is also provided with two pairs of fuel ports, two groups of fuel flow passages which are arranged separately and two groups of fuel through-holes which pass through the fuel flow field plate thereby forming the inner couter-flow flow field of the fuel plate. The air flow field plate is also provided with two pairs of fuel ports which are provided with two pairs of air ports thereby realizing the integration of two flow field plates. In the fuel cell of the invention, the gradual reduction of the concentration of each component of the fluid in one flow passage is averaged by the gradual increase of the concentration of each component of the fluid in the adjacent flow passage thereby realizing that the concentration of each component in the fluid is kept same basically in any macroscopic micro cells in the whole active region.

The invention discloses a photoresist removing method which comprises the following steps of providing a sulfuric acid solution; adding hydrogen peroxide into the sulfuric acid solution periodically to form the washing liquid containing the sulfuric acid and the hydrogen peroxide; spraying the washing liquid on the photoresist of a semiconductor substrate to remove the photoresist. The method can prolong the service life of the washing liquid.

The invention discloses a method for preparing a hydro-demetalization catalyst, which comprises the following steps of: weighing or preparing an alumina carrier; (2) preparing an ammonia solution or an aqueous solution from a VIB metallic compound and / or a VIII metallic compound; and (3) dipping the alumina carrier obtained in the step (1) by using the solution prepared in the step (2), preheating an obtained wet catalyst in water-vapor-contained atmosphere, then, drying in air atmosphere, and then, roasting the catalyst to prepare the final catalyst. The hydro-demetalization catalyst prepared through the method disclosed by the invention is even in the distribution of active components and has higher activity and higher activity stability.

The invention relates to an anode rotary vacuum plating device based on PLC (Programmable Logic Controller) control. A plating tank of the anode rotary vacuum plating device based on PLC control is placed in a vacuum box, a cathode is placed in the plating tank, a binding post of the cathode is welded on the upper surface of the cathode, an anode is inserted into the cathode and is connected with a motor through a clamping and fixing device, a carbon brush of an anode connecting device is propped against the anode, a plurality of wiring holes are formed in the vacuum box, a wiring sealing block is arranged in each wiring hole, an external electrode wire of the anode is connected with the positive pole of a pulse electroplating power supply through the corresponding wiring sealing block, an external electrode wire of the cathode is connected with the negative pole of the pulse electroplating power supply through the corresponding wiring sealing block, and two external electrode wires of a motor are connected with a PLC through the corresponding wiring sealing blocks respectively. The anode rotary vacuum plating device based on PLC control solves the problem of difficulty in electroplating of negative plating parts having large sizes or complicated structures is solved, and the operation difficulty is lowered.

An embodiment of the invention discloses water and fertilizer integrated irrigation equipment. The water and fertilizer integrated irrigation equipment comprises a quantitative fertilizer feeding mechanism, a water and fertilizer mixing mechanism and a quantitative water delivery mechanism, wherein the quantitative fertilizer feeding mechanism comprises a fertilizer feeding barrel, a fertilizer feeding device is mounted at the bottom of the fertilizer feeding barrel, and a crank vibration mechanism for periodically impacting the fertilizer feeding barrel is arranged on the side surface of thefertilizer feeding barrel; the water and fertilizer mixing mechanism comprises a fertilizer mixing barrel, the fertilizer mixing barrel is connected with a fertilization pipe and a plurality of waterinlet pipes, the water inlet pipes are eccentrically mounted on the side wall of the fertilizer mixing barrel, and a filter cartridge is arranged in the fertilizer barrel located below the fertilizerfeeding barrel; the quantitative fertilizer feeding mechanism comprises a water delivery pipe, one end of the water delivery pipe is connected with a water supply end, the other end of the water delivery pipe is connected with the water inlet pipes, and a water delivery pump and a meter regulator are mounted on the water delivery pipe. With the adoption of the quantitative fertilizer feeding mechanism and the quantitative water delivery mechanism, the fertilizer and water are mixed in an equal ratio in real time in the water and fertilizer mixing mechanism, concentration of a fertilizer and water mixture is kept roughly the same all the time, so that fertilizer feeding efficiency is improved, the equipment is simplified, and space and production costs are saved.

The invention relates to a composite type reactive dye composition, which is characterized in that the composition is formed by mixing four kinds of reactive dyes A, B, C and D in percentage by mass: 50 to 100 percent of dye A, 0 to 50 percent of dye B, 0 to 50 percent of dye C, 0 to 50 percent of dye D, and the balance is auxiliaries, and the structure general formulas of the four kinds of reactive dyes A, B, C and D are respectively (1), (2), (3) and (4) shown as the accompanying drawing. The composite type reactive dye composition has better compatibility, the dyeing process is easy to control, and good dyeing stability is realized.

The present invention provides a ceramic component capable of controlling and preventing gas release, having an excellent immobilization effect on other substances attached and deposited on the surface, and less prone to peeling off of other substance particles when used in a thin film forming device, and a manufacturing method thereof. The ceramic part of the present invention is formed on the surface of a dense ceramic base material with a purity of 95% by weight or more, or on the surface of crystal grains near it, forming a plurality of protrusions with a diameter smaller than the diameter of the crystal grains, or with a purity of 95% by weight. The above-mentioned dense ceramics are used as the base material, and the surface layer is a ceramic with a concave-convex structure with a micropore whose diameter is 0.5 to 50 times the average particle size of the ceramic forming the base material and has a large-diameter portion in the depth direction. part. In the ceramic part, the surface of a dense ceramic substrate with a purity of more than 95% by weight and a density of more than 90% of the theoretical density is eroded in an acidic etching solution to form multiple ceramic particles on the surface of the substrate or its vicinity. protruding part to manufacture.

The invention discloses a quick evaluation method and a quick evaluation device for ammonia nitrogen removal characteristics of different biological fillings, belonging to the technical field of water treatment and bio-filter performance. The device comprises a bracket, a plurality of bioreactors, a solution collector, a circulating water pump, a waste liquid collector, an air compressor, an aeration head, a peristaltic pump and the different biological fillings. The method comprises the following steps: connecting multiple stages of bioreactors in parallel in a circulating device, arranging the different biological fillings with the same surface area into the bioreactors, carrying out nitrobacteria biofilm formation, measuring the total ammonia nitrogen (TAN) concentration of an inlet and an outlet and the residence time (t) of each reactor, calculating the first-order rate reaction constant k of the different biological fillings on the TAN removal, and determining the characteristics of the different fillings on the TAN removal. According to the quick evaluation method and the quick evaluation device, the TAN removal performances of the different biological fillings can be evaluated at the same time, a test is stable, the cycle is short, the ammonia nitrogen removal kinetic parameters can be efficiently and quickly determined, and the method and the device have remarkable technical and economic meanings for circulating aquaculture.

The invention relates to a slurry pump cylinder sleeve internal surface electroplating restoration anode rotation vibrating apparatus. The slurry pump cylinder sleeve internal surface electroplating restoration anode rotation vibrating apparatus comprises a support, a vibration beam, an electromagnet, a spring, an anode rotation device, a plating bath and a programmable logic controller (PLC), one end of the vibration beam is movably connected with the support through a pin, the spring is arranged between the vibration beam and a support crossbeam at the upper portion of the vibration beam, the lower end surface of the vibration beam is fixedly provided with a contact, the electromagnet is arranged just below the contact, the lower end surface of the vibration beam is also fixedly provided with a suspension block, the lower portion of the suspension block is provided with an inverted-U-shaped hole, a suspension rope traverses through the inverted-U-shaped hole and then is fixedly connected with the motor of the anode rotation device, the anode rotation device is connected with anode nickel, a cylindrical roller bearing is arranged outside the anode nickel, a terminal is welded outside the cylindrical roller bearing, the anode nickel is inserted into a cathode slurry pump cylinder sleeve, and the cathode slurry pump cylinder sleeve is placed in the plating bath; and the electromagnet and the motor are respectively connected with the programmable logic controller. The apparatus improves a concentration polarization phenomenon and improves the compactness of a plating layer through realizing automatic control of electroplating restoration.

The invention provides a bidirectionally-flowing nanofiltration membrane water treatment system and method. The system comprises a water tank, a membrane component and a valve component, wherein the water tank is connected with the membrane component through the valve component; the membrane component comprises a component main body and a convergence pipeline, the component main body is formed by arranging multiple membrane elements in parallel, a water inlet pipeline and a water concentrating pipeline are arranged at the two ends of the membrane elements respectively; the valve component is communicated with the convergence pipeline. According to the bidirectionally-flowing nanofiltration membrane water treatment system, a bidirectionally-flowing mode is adopted for conducting nanofiltration membrane water treatment in an alternate mode, and the pollution resistance of the nanofiltration membrane elements is improved.

The invention provides an adjustable isotope labeling device for plant photosynthesis. The device is characterized in that organic glass 1 and a sealing ring 2 form an external circulating leaf chamber 3, the external circulating leaf chamber 3 is communicated with a carbon dioxide absorption tank 11 through an organic hose 13, the external circulating leaf chamber 3 is communicated with a circulating pump 4 through an organic hose 5, the external circulating leaf chamber 3 is fixed on a multi-angle fixing frame 6 through a metal supporting rod 7, a carbon dioxide concentration detection probe 8 is arranged in the external circulating leaf chamber 3 and is communicated with a carbon dioxide detector 10 through an optical fiber 9, the carbon dioxide absorption tank 11 is communicated with the circulating pump 4 through an organic hose, a carbon dioxide supply pipe 12 is communicated with the organic hose 5 through a three-way electronic control valve, carbon dioxide supply is guaranteed by electronically controlling the flow speed of carbon dioxide, and a carbon dioxide storage tank 15 is communicated with the three-way electronic control valve and the organic hose 5 through the carbon dioxide supply pipe 12.

The invention belongs to the field of LED lamps, in particular to an LED underground lamp with an adjustable irradiation angle. The LED underground lamp comprises an inner shell and an LED lamp set installed in the inner shell. A transparent cover plate is fixedly mounted at the upper end of the inner shell; the inner shell is fixedly sleeved with an outer shell. An annular heat dissipation cavityis formed between the inner shell and the outer shell; the side wall of the annular heat dissipation cavity is connected with a sealing ring in a sealed and sliding mode. The sealing ring is fixedlyconnected with the bottom face of the outer shell through a supporting spring, a refraction plate is rotatably connected to the inner side wall of the inner shell through a hinge, the side wall of theother end of the refraction plate is connected with the inner side wall of the inner shell in a sealed and sliding mode, and a refraction cavity is formed between the refraction plate and the transparent cover plate. According to the underground lamp, the repulsive force of the arc-shaped magnet to the permanent magnet can be adjusted by rotating the adjusting ring, then the position of the refraction plate is adjusted, the refraction direction of refraction liquid to lamplight is changed, and the illumination angle of the underground lamp can be adjusted without disassembling the undergroundlamp.

The invention relates to an intelligent tea art machine automatic vending system. The intelligent tea art machine automatic vending system comprises a tea powder barrel (100), a tea powder transmitter (200), a tea powder collector (300), a heater (400), a refrigerator (500), a water pump (600), a flowmeter (700), a watering barrel (800), a tea bag shelf (900), a tea water collection cup (1000), a tea cup delivery machine (1100), a radiator (1200), a magnetic valve (1300) and a tea powder collector platform (1400). The intelligent tea art machine automatic vending system is different from a traditional automatic vending machine vending tea water and drink and the like. The intelligent tea art machine automatic vending system can effectively solve defects or disadvantages of the traditional automatic vending machine vending the tea water and the drink such as tea water concentration can't be guaranteed, stored tea leafs are easy to go bed, and residual tea bags or abandoned filter papers are generated and the like.

The invention relates to a method for continuously producing high-cleanness silicon dioxide. The method comprises the following steps: (1) a sodium sulfate solution V0 of which the amount-of-substance concentration n0 is 0.5 to 1 mol / L is added into a continuous reactor; (2) a sodium silicate solution of which the amount-of-substance concentration n1 is 1 to 1.5 mol / L is added into the continuous reactor, and the pH value of a reaction liquid is regulated to 8 to 10; (3) a reaction system is kept at 59 to 61 DEG C, at the same time, the sodium silicate solution of which the amount-of-substance concentration n1 is 1 to 1.5 mol / L and the sulfuric acid solution with the amount-of-substance concentration n2 are added, the volume of the added sodium silicate solution is V1, the volume of the added sulfuric acid solution is V2, the V1, V2, n1, n2 and V0 satisfy the following three relational expressions: V1*n1=V2*n2; (V1*n1) / (V1+V2)=no; n0<n1; (4) precipitation and solutions of which the volume is V1+V2 are discharged from an outlet below the continuous reactor, and the obtained precipitation is filtered, washed and dried to obtain silicon dioxide. By using the method, the silicon dioxide with stable properties can be produced continuously, the obtained silicon dioxide can be used in toothpastes, and teeth can be effectively cleaned.

The invention discloses a mechanically-agitating type liquid-replenishing device for a wool-making groove, which comprises a liquid storing tank, liquid conveying pipes, a liquid replenishing pump, a one-way valve, a flow meter and a wool-making groove, wherein the liquid replenishing pump, the one-way valve and the flow meter are serially connected through the liquid conveying pipe and then arranged between the liquid storing tank and the wool-making groove, a liquid sucking hole of the liquid replenishing pump is communicated with the bottom of the liquid storing tank through the liquid conveying pipe, a liquid outlet of the flow meter is communicated into the wool-making groove through the liquid conveying pipe, and an electric agitating rod is arranged in the liquid storing tank. Because the electric agitating rod is additionally arranged in the liquid storing tank and is controlled to be started for agitating 3-5min before the liquid replenishing pump pumps, the electric agitating rod can be used for uniformly agitating a chemical reagent in the liquid storing tank to ensure that the upper concentration and the lower concentration of the chemical agent in the liquid storing tank are uniform, the concentrations of chemical agents replenished in the wool-making groove every time are ensured to be equal, the wool-making solution in the wool-making groove meets the process requirement, and thus, the stability of the wool-making process is improved and the wool-making quality of a silicon wafer is ensured.

The invention relates to a portable analysis system for measuring photosynthesis of plants in field in real time, which is composed of an external circulating leaf chamber, a carbon dioxide absorption cell, a circulating pump, a carbon dioxide concentration detector, a carbon dioxide storage tank and a multi-angle fixing frame, and the external circulating leaf chamber is fixed on the multi-angle fixing frame; the carbon dioxide storage tank, the carbon dioxide absorption cell and the circulating pump are communicated with the external circulating leaf chamber through organic hoses and valves, and the carbon dioxide concentration detector is arranged in the external circulating leaf chamber. According to the system, the carbon dioxide concentration in the leaf chamber can be completely the same, non-uniform carbon dioxide concentration caused by photosynthesis in the leaf chamber is avoided, feasibility is provided for an experiment for measuring the photosynthetic intensity of a whole plant or a single leaf for a long time, meanwhile, the temperature rise of the closed environment of the leaf chamber can be effectively slowed down, and the stability of the environment humidity is effectively maintained.

The invention discloses a pneumatic soil-loosening and fertilizer-applying apparatus and method and belongs to the technical field of garden machines. The pneumatic soil-loosening and fertilizer-applying apparatus comprises fertilizer applying mechanisms and a supporting mechanism, wherein each fertilizer applying mechanism has a linear driver and an air pick; the bottom of a telescopic rod of the linear driver is connected with the upper side of the supporting seat; the air pick is detachably connected with a shock excitation rod; the shock excitation rod section on the lower side of the air pick is provided with an air and liquid inlet block; the shock excitation rod section under the air pick is hollow; the air and liquid inlet block communicates with the hollow section of the shock excitation rod; the upper part of the shock excitation rod is connected to the supporting seat; the shock excitation rod is parallel to the telescopic rod; the bottom side of the shock excitation rod is connected with a soil loosening device; the lowest part of the soil loosening device is tapered; a liquid applying cavity is formed in the soil loosening device; the soil loosening device corresponding to the liquid applying cavity is provided with at least one exhausting and liquid applying hole; and the air and liquid inlet block is provided with an air inlet and a liquid inlet. The supporting mechanism comprises a rack. A supporting arm is fixedly connected to the rack; and each linear driver is fixedly connected to the supporting arm. Soil ventilating property can be improved; and medicine liquid can be evenly applied to plant roots, so plant growth can be facilitated.

The invention relates to urea [<14>C] capsules and a micro-packaging method thereof. The method comprises: a solution preparation step: preparing an absolute ethyl alcohol solution containing urea [<14>C]; a split charging step: packaging the urea [<14>C]-containing absolute ethyl alcohol solution into capsules; a drying step: drying the capsules charged with the urea [<14>C]-containing absolute ethyl alcohol solution, thus obtaining the capsules containing urea [<14>C] powder. With absolute ethyl alcohol as a carrier medium, the method of the invention improves the packaging precision of theurea [<14>C] capsules. And no carrier medium residual is left in the prepared urea [<14>C] capsules, so that a hidden danger of the carrier medium is avoided and the production cost is reduced. Meanwhile, with a liquid solvent as the carrier medium, the method provided in the invention avoids pollution of radioactive powder, and the employment of an automatic liquid separator raises the packagingprecision and makes the operation process more secure simultaneously, so that influences to the environment can be reduced to the utmost.

The invention relates to the field of diode acid washing, in particular to diode acid washing equipment; the diode acid washing equipment comprises an acid washing tank, a storage mechanism, a stirring mechanism, a driving mechanism, a rotating mechanism, a reinforcing mechanism and a supporting mechanism; through the cooperation of the rotating mechanism and the storage mechanism, the rotating mechanism drives the storage mechanism to rotate in the acid washing liquid of the acid washing tank, so that the acid washing liquid in the acid washing tank is stirred, the concentration of the acid washing liquid after the reaction is improved, and therefore the continuous reaction of a chip is facilitated, the reaction between the chip and the acid washing liquid is accelerated, and the reactioneffect of the chip is ensured to be the same; the rotating mechanism is matched with the supporting mechanism and the reinforcing mechanism, so that the supporting mechanism is conveniently fixed atthe top end of the acid washing tank; and the deflection of the supporting mechanism is prevented by the aid of the reinforcing mechanism, so that the meshing teeth of a second gear and a rack in therotating mechanism are prevented from being staggered, and damage of the meshing teeth of the second gear and the rack are avoided.

The invention discloses a pesticide spraying device for preventing plant diseases and insect pests of peony and relates to the technical field of planting. The pesticide spraying device comprises a bottom plate, wherein the upper surface of the bottom plate is fixedly connected with the lower surface of a placement plate by virtue of a first electric hydraulic rod; and a bearing is arranged on theupper surface of the placement plate. According to the pesticide spraying device for preventing plant diseases and insect pests of peony, due to mutual cooperation of a second electric hydraulic rod,a first connecting block, a second connecting block, a pin shaft, a spraying pipe, a hose and a delivery pipe, the second electric hydraulic rod elongates to drive the spraying pipe to rotate to a horizontal state, the first electric hydraulic rod drives the spraying pipe to move to an appropriate height for spraying pesticides, and the pesticide spraying efficiency can be ensured to a certain degree. Meanwhile, peony leaves can be fully sprayed, the using effect of the pesticide can be ensured to a certain degree, the spraying pipe can be adjusted to be nearby the peony leaves for spraying pesticides, and the condition that the liquid medicine flies apart to cause waste because the spraying pipe is extremely high can be avoided.

The invention discloses a single-component water-based top-coat for a plastic runway. The single-component water-based top-coat is prepared from the following raw materials in parts by weight: 45-55 parts of waterborne acrylic resin, 30-40 parts of waterborne polyurethane resin, 1-5 parts of a water-soluble graphene aqueous dispersion, 0.3-0.5 part of a wetting agent, 0.2-0.4 part of a defoaming agent, 5-7 parts of a cosolvent, 0.3-0.5 part of a thickening agent, 0.5-0.7 part of a preservative and 3-6 parts of deionized water. The single-component water-based top-coat for the plastic runway has the advantage of relatively good wear resistance; the invention also provides a preparation method of the single-component water-based top-coat, and the graphene in the raw materials can be uniformly dispersed in the single-component water-based top-coat, so that the wear resistance of the top-coat is improved.

The invention discloses a method for culturing anaerobic ammonia oxidation granular sludge resistant to high-concentration spiramycin. The method comprises the following steps: adding spiromycin into the influent water of an anaerobic ammonium oxidation reactor and tracing the changes of the effluent water of the reactor, wherein the influent water contains nitrite nitrogen and ammonia nitrogen in a mass concentration ratio of 1: (0.9-1.1); stopping the addition of spiramycin according to the condition of the effluent water of the reactor, proportionally reducing the concentrations of ammonia nitrogen and nitrite nitrogen in the influent water, and restoring the operating performance of the reactor by proportionally and gradiently increasing the concentrations of ammonia nitrogen and nitrite nitrogen in the influent water; and after the reactor performance is restored, adding spiromycin again, wherein the denitrification performance of the reactor is stabilized after fluctuation, and the cultivation of the anaerobic ammonia oxidation granular sludge resistant to high-concentration spiramycinis completed. The method of the invention gradually induces changes in spiramycin resistance genes by the means of primary exposure-gradient restoration-secondary exposure, so anaerobic ammonia oxidation granular sludge resistant to long-term spiramycin interference is cultivated.

The invention provides a bubbling and stirring type liquid-replenishing device with a texturing tank. The bubbling and stirring type liquid-replenishing device comprises a liquid-storing pot, a liquid-conveying pipe, a liquid-replenishing pump, a unidirectional valve, a flow meter and the texturing tank; a bubbling and stirring component is arranged at the bottom of the liquid-storing pot; the bubbling and stirring component consists of an electromagnetic reversing valve, a main air inlet pipe and branch air-blowing pipes; the main air inlet pipe is communicated with the branch air-blowing pipes and communicated with a pressure nitrogen source through the electromagnetic reversing valve; and air outlet holes are formed on the branch air-blowing pipes. The pressure nitrogen source feeds nitrogen into the main air inlet pipe by opening the electromagnetic reversing valve within 3 to 5 minutes before the liquid-replenishing pump replenishes liquid into the texturing tank, and the nitrogen is exhausted from the air outlet holes on the branch air-blowing pipes; as a chemical reagent in the liquid-storing pot cannot react with the nitrogen, the effect of bubbling and stirring by using the pressure nitrogen is ideal, the chemical reagent in the liquid-storing pot can be ensured to be uniformly stirred before liquid replenishment, so that consistent concentration of liquid replenishment by the liquid-replenishing pump is guaranteed, the stability of the texturing process is enhanced, and the texturing quality of silicon sheets is ensured.

The invention provides a vertical type constant-current device with protective functions on three terminals and a manufacturing method therefor. The vertical type constant-current device comprises a constant-current device structure and a bidirectional transient voltage suppressor diode structure which are integrated on the same silicon substrate; an N type doped substrate, a third P type heavily-doped region, a positive electrode and an N type doped epitaxial layer are shared by the constant-current device structure and the bidirectional transient voltage suppressor diode structure; the constant-current device structure also comprises a first diffusion P type well region, an N type heavily-doped region, a first P type heavily-doped region, an N type channel region, a first oxide layer and a first metal negative electrode; and the bidirectional transient voltage suppressor diode structure also comprises a second P type heavily-doped region, a second oxide layer and a second metal negative electrode. According to the vertical type constant-current device, the bidirectional transient voltage suppressor diode and the constant-current device are integrated together, so that the constant-current device is endowed with certain surge handling capability, thereby improving the reliability of the constant-current device and a system formed by the constant-current device, and greatly reducing the area.

The invention discloses a centralized liquid supply system of polishing machines. The centralized liquid supply system comprises a polishing liquid concentration part, a polishing liquid mixing part and a liquid supply and backflow pipeline. According to the centralized liquid supply system of the polishing machines, centralized liquid supply is carried out on various polishing machines through aliquid supply pool and a liquid supply pipe, and centralized management and operation of polishing liquid are facilitated. Only the concentration of the polishing liquid in the liquid supply pool needs to be detected every time, control over the concentrations of the polishing liquid of the polishing machines can be achieved, it is guaranteed that the concentrations of the polishing liquid of thepolishing machines is the same, and quality conditions have no large difference.

The invention discloses a fertilizer stick for potted plants, and relates to the technical field of fertilizer sticks. With prior arts, when watering or fertilization is carried out upon a potted plant, wasting or soil compaction is caused. The invention aims at solving the problems. The fertilizer stick comprises an inner-layer fertilizer stick and an outer-layer fertilizer stick with opened tops, and a sealing cap used for sealing the inner-layer fertilizer stick. The inner-layer fertilizer stick is connected with the outer-layer fertilizer stick. A certain gap is formed between the inner-layer and outer-layer fertilizer sticks. A small hole is arranged on the inner-layer fertilizer stick. A sealing device used for sealing or opening the inner-layer fertilizer stick small hole is arranged between the inner-layer fertilizer stick and the outer-layer fertilizer stick. The bottom of the outer-layer fertilizer stick is opened. The fertilizer stick provided by the invention can be used for independently watering or fertilizing plants.

The invention belongs to chemical equipment, and particularly relates to a membrane catalytic reactor. The membrane catalytic reactor comprises a feed port, a discharge port, a raw material chamber, a product chamber, a jacket, an electric stirrer and a catalytic membrane, wherein the electric stirrer is arranged above the raw material chamber; stirring paddles extend into the raw material chamber; the catalytic membrane is arranged between the raw material chamber and the product chamber; the feed port is formed on the top of the raw material chamber; the discharge port is formed at the bottom of the product chamber; and the jacket is arranged outside the raw material chamber, the catalytic membrane and the product chamber. By adopting the membrane catalytic reactor for performing esterification reaction, the energy consumption is low, and the reaction efficiency is high; the problems of separation and recovery of a catalyst are avoided, and the product cost is reduced; strongly acidic cation exchange resin powder is used as a catalytically active matter; polyethersulfone is used as a base material; a hybrid membrane which is prepared by a phase conversion method is a catalytic membrane which has higher efficiency for catalytic esterification reaction and has no problems of equipment corrosion, environment pollution and the like; and the membrane catalytic reactor has the advantages of simple equipment structure, high adaptability, easiness in control of process, convenience in operation and suitability for industrial implementation.

The invention discloses passive heterotopic cultivation equipment for aquatic plants. The equipment comprises a box body with an open upper end, wherein a plurality of liquid storage cylinders are uniformly arranged on the side wall of the box body; a plurality of limit rods are symmetrically and vertically connected on the inner bottom wall of the box body; each limit rod is slidably sleeved witha floating plate; a plurality of control mechanisms matched with the corresponding floating plates are uniformly arranged on the box body; each control mechanism comprises a mounting groove formed inthe box body; sliding blocks are elastically connected in the mounting grooves through return springs; and the side walls of the sliding blocks are in sealed sliding connection with the walls of themounting grooves; communication pipes communicate between the mounting grooves and the corresponding liquid storage cylinders; and L-shaped channels matched with the communication pipes are formed inthe sliding blocks. Movement of the sliding blocks are controlled by cooperation of the floating plates and the return springs, so that the function of opening and blocking the communication pipes isachieved, the function of automatically adding a nutrient solution is achieved, and the situation that plants are damaged by mistaken or insufficient addition is avoided.

The present invention relates to a fuel cell based on the in-plate counter-flow flow field and belongs to the technical field of fuel cell. The air flow field plate of the cell unit is provided with two pairs of air ports, two groups of air flow channels with are distributed separately with each other and two groups of air through-holes which pass through the air flow field plate thereby forming the inner counter-flow flow field of the air plate. The air flow field plate is also provided with two pairs of fuel ports, two groups of fuel flow passages which are arranged separately and two groupsof fuel through-holes which pass through the fuel flow field plate thereby forming the inner couter-flow flow field of the fuel plate. The air flow field plate is also provided with two pairs of fuelports which are provided with two pairs of air ports thereby realizing the integration of two flow field plates. In the fuel cell of the invention, the gradual reduction of the concentration of eachcomponent of the fluid in one flow passage is averaged by the gradual increase of the concentration of each component of the fluid in the adjacent flow passage thereby realizing that the concentrationof each component in the fluid is kept same basically in any macroscopic micro cells in the whole active region.

The method includes following steps: providing a substrate with storage unit zone and high voltage circuit zone; forming first, second source poles / drain poles zones on the two pieces of zone in the substrate; forming oxidizing layer, first conductive layer and topping layer in sequence on the substrate; defining floating grid on the storage unit zone, and removing out the topping layer and the first conductive layer from the high voltage circuit zone; thickening exposed the oxidizing layer; removing out the topping layer, and forming barrier layer on the exposed surface of floating grid; forming second conductive layer, defining out grid pole in the high voltage circuit zone, and defining out control grid pole in storage unit zone. Combining procedure for preparing storage unit and high voltage components, the method does not need to increase number of using photoresist so as to shorten fabricating flow and lowering fabricating cost.