44results about How to "Has the advantage of energy saving" patented technology

The invention relates to a low-loss microwave dielectric ceramic material and a preparation method thereof, which belongs to the technical field of an electronic information functional material and device. The low-loss microwave dielectric ceramic material comprises a main crystal phase and additives, wherein the main crystal phase comprises MgTiO3, Mg2SiO4 and CaTiO3, and the main crystal phase contains little Mg2TiO4; the additives comprise MnO2, Co2O3, CeO2 and Nb2O5; the loss of the material is detected to be low (Qxf falls in the range of 65000 to 85000GHz), the dielectric constant is adjustable (between 9 and 20), the frequency temperature coefficient is stable (within + / -10ppm / DEG C), the machinability is good, and the application requirement of a microwave communication industry can be met. The preparation method is a solid-phase sintering method and has the characteristics of simplicity, environmental friendliness and low cost, and is easy to control.

The invention provides a microwave dielectric ceramic material and a preparation method thereof, belonging to the technical field of electronic materials. The microwave dielectric ceramic material comprises the following components in percentage by mass: 25-35% of MgO, 60-68% of TiO2, 1-10% of CaO, 0-2% of SiO2, 0-2% of MnO2, 0-2% of Nb2O5 and 0-2% of CeO2; the microwave dielectric ceramic material is prepared by proportioning the MgO, TiO2, CaO, SiO2, MnO2, Nb2O5 and CeO2 according to the mass percentage of each component; performing ball milling and mixing; pre-calcining a mixture at a temperature in a range of 1050-1200 DEG C and sintering the mixture at the temperature in a range of 1250-1360 DEG C. In the invention, the microwave dielectric ceramic material is prepared by utilizing atraditional solid-phase sintering method, the process is simple and the cost is low; according to the prepared microwave dielectric ceramic material, the Q*f value is in a range of 63,000-83,000 GHz,the relative dielectric constant epsilon r is in a range of 20-22, and the temperature coefficient of resonance frequency is within + / -10 ppm / DEG C, so that the preparation requirements of a high-performance microwave device can be met.

The invention discloses a (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material and a preparation method thereof and belongs to the technical field of electronic information functional materials. The (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material comprises a base material and additives. The base material is (1-x)Sr(1-y)CayTiO3-xLaAlO3, x is greater than or equal to 0.40 and is less than or equal to 0.50 and y is greater than or equal to 0.05 and is less than or equal to 0.20. The additives comprise B2O3, Co2O3, MnO and CeO2. A main crystalline phase formed from the base material is a composite perovskite SrTiO3-LaAlO3 phase. A sintering temperature in air is in a range of 1530-1580 DEG C. A Q*f value is in a range of 45000-55000GHz. A relative dielectric constant is in a range of 35-43. A resonant frequency temperature coefficient is + / -10ppm / DEG C. The (SrCa)TiO3-LaAlO3-based microwave dielectric ceramic material is prepared by the traditional solid-phase ceramic synthesis technology, has the advantages of cheap raw materials, environmental friendliness and low cost, and is convenient for batch production and application popularization.

The invention relates to a parallel series dynamical system of engineering machinery. The parallel series dynamical system comprises two parts namely a travelling mechanism power system and a working device power system, wherein the walking mechanism power system and the working device power system are connected through a transfer case and a clutch, and the walking mechanism power system is a parallel type oil-liquid hybrid power system; and the working device power system is a series type oil-electricity-liquid hybrid power system. Through controlling the connection and the disconnection of an electricity generator clutch, a hydraulic travelling driving clutch and an engine clutch, the purpose of shifting a parallel type hybrid mode and a series type hybrid mode can be realized, and braking energy of the working device and the travelling mechanism can be recycled and reused through a hydraulic accumulator and a power battery. According to the hybrid dynamical system disclosed by the invention, not only can the advantages of the parallel connection system and the advantages of the series connection system be fully brought out, but also the energy recycling efficiency of the working device can be improved through the combination of hydraulic energy storage and battery energy storage, and the complete engineering machinery fuel oil consumption is effectively reduced.

A B-substituted BNT microwave dielectric ceramic material and its preparation method belong to the technical field of a functional material. The general chemical formula of the microwave dielectric ceramic material is Ba3.75Nd9.5Ti18-y(M,N)yO54, wherein y is less than or equal to 2.5 and greater than or equal to 0.6; the microwave dielectric ceramic material is prepared by steps of: burdening BaO, Nd2O3, TiO2, oxides of metallic elements M and N according to mole ratio of the general chemical formula, carrying out ball-milling, presintering and sintering; an oxide of the element M is Nb2O5; and an oxide of the element N is one or more compounds selected from Al2O3, MgO, ZnO, Co2O3 and NiO. According to the invention, simultaneous substitution of high and low valence elements is carried out in the B position of Ba6-3xNd8+2xTi18O54. The microwave dielectric ceramic material prepared by a one-step synthesis process has high dielectric constant, low loss characteristic and low frequency-temperature coefficient, can meet requirements in the microwave communication industry, and is especially suitable for manufacturing of RFID tags.

The invention relates to a compound BZT microwave ceramic dielectric material and a preparation method thereof and belongs to the field of an electronic information functional material and a device. The material has a structure of two crystal phases with a mole ratio of BaTi4O9 to BaZn2Ti4O11 equal to (1-x): x (x belonging to [0.05, 0.75]), and meanwhile, 0.0 to 2.0 percent of MnO2, 0.0 to 1.5 percent of Nd2O3 and 0.0 to 3.0 percent of CuO are added. In the invention, the BaTi4O9 ceramics and the BaZn2Ti4O11 ceramics which respectively have positive and negative frequency temperature coefficients are compounded, and the MnO2, the Nd2O3 and the CuO are added, thereby obtaining the compound BZT microwave ceramic dielectric material with moderate dielectric constant, higher quality factor and continuously adjustable frequency temperature coefficient approaching to zero. The compound BZT microwave ceramic dielectric material can be roasted at middle temperature and is suitable for manufacturing microwave communication elements, such as, a resonator, a filter, a base plate, an antenna, and the like. During a preparation process, a traditional solid phase method is adopted for once compounding a BaTi4O9+ BaZn2Ti4O11 complex phase structure. The preparation method is characterized by optimized process, capability of saving energy and environmental protection.

The invention discloses a preparation method of linen flat-strip fabric. The preparation method comprises the following steps that raw flax with a disintegration degree larger than or equal to 250 count is selected and made into linen roving; bio-enzymatic treatment is conducted, and degumming treatment is conducted on the linen roving; the linen roving treated with bio-enzymes is made into linen S twist yarn and linen Z twist yarn, and the count of both the linen S twist yarn and the linen Z twist yarn is 36 metric count; the linen S twist yarn is put into a humidification storehouse for humidification curing; warping and drawing-in treatment is conducted on the linen Z twist yarn in sequence; the linen Z twist yarn is regarded as warp yarn, the linen S twist yarn is regarded as weft yarn, a loom is used for weaving, and fabric dyeing is conducted on woven gray cloth to obtain the linen flat-strip fabric. According to the preparation method, the prepared linen fabric has the advantages that dyeing is even, colors are beautiful, and the design and color and the cloth type are novel and fashionable.

The invention provides a high-medium single-layer miniature ceramic capacitor substrate material. Raw materials comprise main ingredients and doping agents. Chemical components of the main ingredients are SrTiO3. The doping agents are composed of, by mass, mwt% of Nb2O5, nwt% of SiO2, pwt% of Y2O3, qwt% of CaSnO3 and rwt% of composite oxide additives. The preparation method includes batching, ball-milling, drying, pelleting, forming, glue discharging, reduction atmosphere sintering and oxidation heat treatment. No Pb, Cd or other volatile or heavy metal elements are contained in the formula of the high-medium single-layer miniature ceramic capacitor substrate material, and the high-medium single-layer miniature ceramic capacitor substrate material is an environment-friendly and pollution-free medium ceramic material. The sintering temperature of ceramic is 1340-1400 DEG C, the dielectric constant is high, and a certain energy-saving advantage is achieved; the raw materials are sufficiently supplied at home, price is low, and the high-medium single-layer miniature ceramic capacitor substrate material is suitable for manufacturing high-performance communication components in the modern communication technology.

The invention relates to a magnesium oxychloride-based immature soil curing agent and a preparation method and application thereof. The magnesium oxychloride-based immature soil curing agent is prepared from, by weight, 100 parts of light burned magnesium oxide powder, 50-250 parts of a magnesium chloride solution, 0.1-2.0 parts of toughened crack-resistant fiber, 0.5-5.0 parts of a strengtheningauxiliary and 0.8-8.0 parts of water resistant additives. The preparation method comprises the steps that a magnesium oxide solution is put into a stirrer, the toughened crack-resistant fiber, the light burned magnesium oxide powder, the strengthening auxiliary and the water resistant additives are added, and stirring is conducted for a period of time. For the application, 100 parts by weight of immature soil and 130-900 parts by weight of the curing agent are taken, mixed and stirred to be uniform, and curing sample slurry is obtained, then the curing sample slurry is put into a mold to be cured and formed, with a plastic film covered to keep moisture, and standing and maintenance are conducted for 7-50 d in the environment that the temperature is 5-65 DEG C, and the relative humidity is45-85%. Compared with an existing curing agent, the curing agent is high in strength and good in water resistance.

The invention discloses a vehicle transmission method and a vehicle transmission mechanism of a hybrid power system. The vehicle transmission mechanism at comprises an engine, a first clutch, a motor / power generator, a power transmission gear pair, a second clutch and a motor, wherein the first clutch is arranged between the engine and the motor / power generator; the second clutch is arranged between the motor / power generator and wheels as well as between the first clutch and the wheels; the power transmission gear pair is arranged between the first clutch and the wheels as well as between the motor / power generator and the wheels; the wheels can be driven by the motor directly or through a gear. According to the vehicle transmission method and the vehicle transmission mechanism, disclosed by the invention, the advantages of the hybrid power system are remained; meanwhile, on the premise that uninterrupted connection between the hybrid power system and the wheels is ensured, parts and structures such as a transmission, a starter and a small power generator in a common hybrid power system can be removed, the structure of the hybrid power system is simplified, the weight of the hybrid power system is reduced, impact in the hybrid power system due to power exchange can be reduced, and meanwhile, the hybrid power system can be very conveniently allocated into a two-wheel-drive or all-wheel-drive system.

The invention discloses an automatic incubator and a working process thereof. The incubator comprises a box body, a processor, a balancing air inlet pipe, egg rack carts, a fan, an air inlet, heat exchange coil pipes, a CO2 (carbon dioxide) sensor, an air door and temperature sensors, wherein the CO2 sensor is arranged in the box body; the air door is arranged in the middle of the top plate of the box body; the processor is respectively connected with the CO2 sensor and the air door; the temperature sensors are arranged on a side plate corresponding to a circulating air flue in the box body; the heat exchange coil pipes are arranged between two adjacent rows of the egg rack carts in the box body; the heat exchange coil pipes are provided with joints which are connected with an external hot water source and an external cold water source; the processor is respectively connected with the temperature sensors and the joints; and the processor is used for controlling the communication of the heat exchange coil pipes with the external hot water source or the external cold water source. The working process of the incubator comprises the following steps of: temperature control, humidity control, egg turning on the egg rack carts and CO2 control. The automatic incubator and the working process can enable the simulation of an incubation environment in the incubator to be more precise andthe regulation and control to be simpler and more feasible.

The invention relates to the field of microwave dielectric materials, in particular to a high-quality-factor microwave dielectric ceramic material and a preparation method thereof. The microwave dielectric ceramic material comprises raw materials included in a formula expression, i.e., (1-x)(Mg<1-y>, Zn)TiO<3> + xCaTiO<3> + awt%Mg<2>SiO<4> + bwt% MO. The microwave dielectric ceramic material prepared by the method has an ultrahigh quality factor, wherein epsilon<r> is equal to 18-22, Qf is equal to 90000-100000 GHz, and tau<f> is equal to + / - 8ppm / DEG C. The microwave dielectric ceramic material disclosed by the invention is simple in preparation process, low in cost, good in reproducibility, easy for industrial production and excellent in performance, and can be widely applied to manufacturing of microwave frequency devices such as high-stability dielectric filters, duplexers, combiners and the like.

Provided is a glyphosate synthesis technology. The glyphosate synthesis technology is characterized in that a metal alkoxide organic compound is adopted as a catalyst for glyphosate synthesis and particularly for depolymerization and addition during glyphosate synthesis. The glyphosate synthesis technology includes the following steps: an alcohol and paraformaldehyde are mixed and stirred to be uniform, the catalyst is added into a mixture solution or directly added into an alcohol solution of formaldehyde, and a transparent mixture solution is generated; triethylamine and glycine are added into the transparent mixture solution, stirring is conducted to carry out an addition reaction, and after the addition reaction is finished, dimethyl phosphite is added into the mixture solution to carry out a condensation reaction; and after the condensation reaction is finished, hydrochloric acid is added into the mixture solution to carry out hydrolysis, and then through crystallization, washingand drying, glyphosate is obtained. According to the technical scheme of the glyphosate synthesis technology, the specific catalyst is adopted, therefore, glyphosate synthesis reaction speed and selectivity are improved, reaction speeds of depolymerization and addition are high, the reactions are conducted completely, the final yield of a glyphosate product obtained through the glyphosate synthesis technology is increased by 3% or above compared with the final yield of a glyphosate product obtained through traditional technologies, and thus the glyphosate synthesis technology has a reaction advantage, an energy-saving advantage, a coat advantage and an environment-friendly advantage.

The invention discloses an independent controllable intake-exhaust two-stroke (capable of being changed into four-stroke) internal-combustion engine system which is used for solving the defects including low fuel efficiency, large emission pollution, participation of engine oil in combustion and the like of a two-stroke internal-combustion engine by applying the independent controllable intake-exhaust system, so that the energy is saved, the emission is reduced, the pressurized working conditions of the two-stroke internal-combustion engine are realized, the defect that the power per liter of a four-stroke internal-combustion engine is lower than that of the two-stroke engine is solved, and a completely new function of freely converting between the two strokes and the four strokes in one internal-combustion engine is creatively realized. Moreover, the independent controllable intake-exhaust two-stroke internal-combustion engine system is simpler in structure, lighter, provided with theoretical maximum power which is twice that of the conventional four-stroke pressurizing internal-combustion engine, integrated with the advantages of the two-stroke internal-combustion engine and the four-stroke internal-combustion engine and capable of making up the defects of the two-stroke internal-combustion engine and the four-stroke internal-combustion engine, and therefore, the independent controllable inlet-exhaust two-stroke internal-combustion engine system is an internal-combustion engine system with a completely new principle and a completely new manufacturing method, and a novel power choice is provided for the vehicle industry and other equipment manufacturing industries.

The invention discloses a low-temperature sintered medium-dielectric-constant microwave dielectric ceramic material and a preparation method thereof, the low-temperature sintered medium-dielectric-constant microwave dielectric ceramic material comprises a base material and an additive, and the preparation method of the low-temperature sintered medium-dielectric-constant microwave dielectric ceramic material comprises the following steps: step 1, burdening; 2, carrying out primary ball milling; step 3, performing solid-phase synthesis; 4, carrying out secondary ball milling; step 5, granulatingand molding; and step 6, sintering; the method comprises the following steps: step 1. MgO, TiO2, CaCO3 and La2O3 are used as raw materials; according to the invention, the sintering temperature of the traditional microwave-based ceramic is reduced; the microwave dielectric ceramic has the advantages of energy conservation, excellent performance, simple sintering condition, air sintering atmosphere, wide sintering range, high stability, greatly improved quality factor and great practical value, the raw materials are all domestic raw materials, the price is moderate, the formula does not contain heavy metals, and the microwave dielectric ceramic is environment-friendly and pollution-free.

The multiple heat source multifunctional solar energy heat pump consists of one solar heat collecting system and one multifunctional heat pump system. The solar heat collecting system includes full glass tube solar heat collector, large heat accumulating water tank, solenoid valve and high temperature circulating pump; and the multifunctional heat pump system includes variable frequency compressor, outdoor water cooling source heat exchanger, outdoor air cooling source heat exchanger, indoor air cooling source heat exchanger, indoor coil pipe water heating tank, condensing coil pipe, electronic expansion valve, liquid storage and two electromagnetic triple valves. The solar heat collecting system and the multifunctional heat pump system are connected through the variable frequency high temperature circulating pump and solenoid valve. The present invention can utilize both solar energy and air source as the heat source of the heat pump, and has several functions and raised COP value of heat pump system.

The invention relates to a process for synthesizing glyphosate by an alkyl ester method, the method comprises the following steps: heating or alkalifying a methanol solution of paraformaldehyde or formaldehyde to depolymerize, adding glycinate, uniformly stirring to carry out addition reaction, adding no or less triethylamine, adding dimethyl phosphite and a small amount of triethylamine to carry out condensation reaction after the addition reaction, and hydrolyzing with hydrochloric acid, adding alkali to crystallize, washing and drying to obtain the glyphosate. Glycine salt is used for replacing glycine, the glyphosate crystallization yield is not affected, the addition reaction efficiency is higher, the temperature is low, the time is short, the process has the characteristics of being simple to operate, energy-saving, environment-friendly and high in selectivity, the production cost of glyphosate synthesis can be greatly reduced (for example, the use amount of hydrochloric acid, liquid caustic soda and steam is greatly reduced), mother liquor treatment is simple, and the process has the advantages of reaction, cost and environmental protection.

The invention discloses a negative temperature coefficient thermomagnetic composite sensitive resistance material and a preparation method thereof, and belongs to the field of electronic component materials. The resistance material of the invention comprises the following components in weight percentages, calculated by oxides: 73-78% of Mn3(subscript)O4(subscript), 10.5-13% of Co2(subscript)O3(subscript), 11.5-14% of NiO and 0-0.5% CuO. A formula of the invention does not contain Fe, ensuring high homogeneity under the condition of high temperature sintering; and the sintering temperature is as low as only 1140 DEG C, showing a certain energy-saving advantage; and the raw materials are abundant in China and appropriate in price, without higher cost constraints for the large-scale production of the resistance material.

The invention discloses a worm wheel type ratchet wheel type hoisting mechanism. The worm wheel type ratchet wheel type hoisting mechanism comprises a motor, a winding drum and a pawl type worm wheeland worm one-way force transmission speed reducing mechanism, the motor comprises an ascending motor and a descending motor, and the pawl type worm wheel and worm one-way force transmission speed reducing mechanism comprises an output shaft, a centering disc, a ratchet wheel, a worm wheel, a pawl and a worm, wherein the ratchet wheel is fixed on the output shaft and rotates along with the output shaft, the centering disc and the worm wheel are sleeved on the output shaft through bearings and do not rotate along with the output shaft, the centering disc is located on the left side of the ratchet wheel, the worm wheel is located on the right side of the ratchet wheel, one end of the connecting shaft is fixed on the centering disc, the other end of the connecting shaft is fixed to the worm wheel, the pawl is arranged on the connecting shaft, one end of the spring is fixed to the centering disc, the other end of the spring is fixed in the middle of the pawl, the worm wheel is meshed with the worm, the ascending motor is connected with the left end of the winding drum, the right end of the winding drum is connected with the output shaft, and the descending motor is connected with the worm. The worm wheel type ratchet wheel type hoisting mechanism has an automatic locking function, and the ascending motor and the descending motor only need to rotate unidirectionally, so that the failure rate is low.

A magnesium oxysulfide-based raw soil curing agent, its preparation method and application. The curing agent includes by weight: 100 parts of light-burned magnesium oxide powder; 50 parts to 250 parts of magnesium sulfate solution; 2.0 parts; 0.5 to 5.0 parts of reinforcing additives; 0.8 to 8.0 parts of water resistance additives. The preparation method comprises the steps of pouring the magnesium sulfate solution into a mixer, adding toughening and anti-cracking fibers, light-burned magnesium oxide powder, reinforcing additives and water-resistant additives, and stirring for a period of time. The application includes taking 100 parts of raw soil and 130 to 900 parts of the above-mentioned curing agent by weight, mixing the two, stirring evenly to obtain a cured sample slurry, and then putting the cured sample slurry into a mold for curing and molding, covering the plastic film To keep the moisture, keep it in an environment with a temperature of 5-65°C and a relative humidity of 45%-85% for 7d-50d. Compared with the existing curing agent, the curing agent has higher curing strength and better water resistance.

The invention discloses an organic catalyst for synthesis of glyphosate. The catalyst is an alkoxy compound including alkali metal in the first main group, also comprises alkoxy metal compounds whichare prepared through a reaction between fresh anhydrous alcohol and anhydrous hydroxides or oxides of the first main-group alkali metal or the alkali metal, and is one or a combination of more of thealkoxy metal compounds in the form of an alcohol solution of the alkoxy metal compounds. The glyphosate synthesizing process comprises the steps: adding the organic catalyst to a methanol solution ofparaformaldehyde or formaldehyde, performing a depolymerization reaction, adding triethylamine and glycine after completion of the reaction, performing stirring for an addition reaction, adding dimethyl phosphite after completion of the reaction, performing a condensation reaction, adding hydrochloric acid for hydrolysis after completion of the reaction, and then performing crystallization, washing and drying so as to obtain glyphosate. The reaction speed and reaction selectivity of glyphosate synthesis can be improved through the specific catalyst, the depolymerization reaction has a high speed and thoroughness, and the addition reaction also has high selectivity, so that the yield of the glyphosate product reaches 3% or above; and the process has the advantages of reactions, energy saving, cost and environmental protection.

The present invention relates to a method, a system and a device for pushing digital information to a terminal through traditional audio broadcasting. The method comprises the following steps: S1, converting multimedia data into an information-carrying audio signal; S2, modulating and broadcasting the information-carrying audio signal through a broadcasting station; S3, demodulating the audio signal through a radio receiver circuit by a terminal; S4, recovering the information-carrying audio signal to the multimedia data by the terminal; and S5, caching the multimedia data locally and providing an interactive interface for data browsing, playing and management by the terminal. In addition, complementation of advantages of traditional broadcasting and digital broadcasting and smooth transition from analog signals to digital signals can be achieved through mixed arrangement of audible audio and information-carrying audio according to periods of time. Through adoption of the scheme of the present invention, a user can receive digital multimedia broadcasting without replacing equipment, and the problem that mobile network traffic cost is required for acquiring information outdoors at present is solved. The technical scheme of the present invention has the advantages of economy, convenience, timeliness, energy saving, easy popularization, simple operation and maintenance, etc.

The invention discloses a microwave energy alcohol thermal growth method for a red light luminous crystal. A chemical metering formula of the crystal is Ca(1-a-b-c)MgaS:bMn; chemical valences of ions of cEu, Mn and Eu are divalent; a, b and c are atom mole numbers, wherein a is more than or equal to 0.0 and less than or equal to 0.5; b is more than or equal to 0.000 and less than or equal to 0.005, and c is more than or equal to 0.000 and less than or equal to 0.003; solid materials are dissolved by using alcohols; alcohol thermal growth is carried out in an enclosed reaction tank of a microwave reactor; and after solid-liquid separation and annealing treatment are carried out, the red light luminous crystal of which the emission main wavelength is 660 nanometers can be manufactured. The microwave energy alcohol thermal growth method has the advantages that a microwave energy heating means is utilized, the method has the advantage of energy conservation and can overcome the defect of environment pollution in the traditional preparation method in the enclosed reaction tank; the solvent can be recycled, and the emission wavelength of the crystal is easily modulated to a required red light wavelength position, so that the red light can be emitted after the crystal can be effectively excited by the green light and the blue light.

A B-substituted BNT microwave dielectric ceramic material and its preparation method belong to the technical field of a functional material. The general chemical formula of the microwave dielectric ceramic material is Ba3.75Nd9.5Ti18-y(M,N)yO54, wherein y is less than or equal to 2.5 and greater than or equal to 0.6; the microwave dielectric ceramic material is prepared by steps of: burdening BaO, Nd2O3, TiO2, oxides of metallic elements M and N according to mole ratio of the general chemical formula, carrying out ball-milling, presintering and sintering; an oxide of the element M is Nb2O5; and an oxide of the element N is one or more compounds selected from Al2O3, MgO, ZnO, Co2O3 and NiO. According to the invention, simultaneous substitution of high and low valence elements is carried out in the B position of Ba6-3xNd8+2xTi18O54. The microwave dielectric ceramic material prepared by a one-step synthesis process has high dielectric constant, low loss characteristic and low frequency-temperature coefficient, can meet requirements in the microwave communication industry, and is especially suitable for manufacturing of RFID tags.

The invention discloses an energy-saving air-conditioner, which comprises the following parts: two indoor sets within two evaporators and outdoor set within compressor and condenser, wherein the outlet of two indoor sets connects liquid accumulator through pipe; the outlet of liquid accumulator connects the inlet of two compressors separately; the inlet and outlet of two compressors connect the condenser through one-way valve; the other end of condenser two outlet connects the evaporator inlet of two indoor sets through paralleling pipe of capillary and electromagnetic valve; the equilibrate capillary is connected among the paralleling pipe of two capillaries and electromagnetic valve.

An organic catalyst for synthesizing glyphosate, the catalyst is an alkoxy compound comprising the first main group alkali metal, and also comprises fresh anhydrous methanol, ethanol and potassium, sodium metal or potassium, sodium anhydrous hydroxide Or a combination of one or more of the alkoxy metal compounds prepared by oxides or prepared by alkali metal reaction, and in the form of alcoholic solutions of the alkoxy metal compounds. In the process of synthesizing glyphosate, paraformaldehyde or methanol solution of formaldehyde is depolymerized after adding organic catalyst, and after the reaction is completed, triethylamine and glycine are added to stir for addition reaction; after the reaction is completed, dimethyl phosphite is added to carry out Condensation reaction, hydrochloric acid is added for hydrolysis after the reaction is completed, and then glyphosate is obtained through crystallization, washing and drying. Using a specific catalyst to improve the reaction speed and reaction selectivity of glyphosate synthesis, the depolymerization reaction speed is fast, the reaction is thorough, the addition reaction selectivity is also high, and the glyphosate product yield is more than 5% higher, which has the advantages of reaction and energy saving. , cost advantage, environmental protection advantage.

The invention relates to a process for extracting and concentrating a dilute aqueous formaldehyde solution by using a composite solvent. A process device comprises a recovery extraction tower, a concentration extraction tower, a desolventizing rectifying tower and a plurality of heat exchangers, wherein tower equipment in the process is a plate type tower in which a plurality of sieve plates are arranged, a solvent is selected as a continuous phase during operation, and the aqueous formaldehyde solution is a dispersed phase. The process comprises the following specific steps: completely extracting formaldehyde in a dilute formaldehyde solution into a composite solvent phase in a recovery extraction tower, allowing the composite solvent phase to flow out from the top of the tower, removing most of a cosolvent through heating and evaporating, enabling the composite solvent phase to enter the bottom of a concentration extraction tower, and allowing the content of formaldehyde in the solvent phase to be continuously increased under the action of adding concentrated formaldehyde into the tower top until a concentration requirement is met. The composite solvent adopted by the process can obviously improve the partition coefficient of formaldehyde under the condition of a low concentration, and a concentrated product is obtained by further concentration through fractional extraction, so efficient purification and phase separation are realized, and an energy-saving and effective production method is provided for concentration of the low-concentration aqueous formaldehyde solution.

The invention discloses a sand prevention type oil well pump oil production process. The sand prevention type oil well pump oil production process is mainly composed of a screw pump and a viscous oilpumping structure. An underground structure is the screw pump disposed in an oil field, includes a joint, a sucker rod and other equipment, and is used for collecting oil of the oil field; and at thesame time, the underground structure is further provided with an annulus sand setting structure and oil production power, the oil production power includes a motor, an electric cabinet and other structures, various driving operations in the oil production are completed, the operation of the screw pump can be stably controlled, and the technological process of the oil production is improved. The sand prevention type oil well pump oil production process does not involve too much motion equipment due to the concise structure of the screw pump, so that hydraulic loss is not generated, and a certain energy-saving advantage is achieved.

The invention relates to a microwave device ceramic substrate material and a preparation method thereof, and belongs to the technical field of electronic materials. The microwave device ceramic substrate material comprises a main crystal phase and a modified additive, wherein the chemical general formula of the main crystal phase is Mg(1+x)CoyTiO(3+x+y), x is more than 0.01 and less than 0.05, y is more than 0.001 and less than 0.01, the modified additive is one or a plurality of materials selected from CeO2, Nb2O5, Nd2O3, ZnO, MnCO3 and SiO2, and the mass of the modified additive is 0.0-4.0%of the total mass of the whole microwave device ceramic substrate material. The preparation method comprises processes of material preparing, ball milling, pelletizing, forming and sintering. The microwave device ceramic substrate material has characteristics of high Q*f value (80000-100000), medium dielectric constant (17-20) and serialization dielectric constant temperature coefficient (0-110),is applicable for preparations of the microwave device substrate materials, and can meet the preparation requirements of the microwave devices (especially the microstrip filter). The method of the present invention has characteristics of simpleness, easy control, environmental protection and low cost.