68results about How to "Maximum absorption" patented technology

The invention relates to a high-yield cultivation method for honeysuckles in low mountains and hills. The method includes the key technical steps such as variety selection, raising of seedlings by cutting, digging of planting holes, base fertilizer application and planting, covering of mulching films, pruning, integrated control of plant diseases and insect pests and topdressing. The method is characterized in that growth and development of plants of the honeysuckles are obviously promoted, the time limit ahead of the high-yield period is shortened, the yield of the honeysuckles is improved, and the quality of the honeysuckles is guaranteed. Compared with an ordinary planting method, the high-yield cultivation method enables the yield in the first year after transplant to be promoted by 56.7%, the yield in the second year after the transplant is promoted by 87.3%, and the yield in the third year after the transplant is promoted by 116.6%. However, no obvious changes happen on the content of chlorogenic acid of the honeysuckles and contents of galuteolin of the honeysuckles, the content of the chlorogenic acid of the honeysuckles and the content of the galuteolin of the honeysuckles all meet the standard provisions of <pharmacopoeia of the people's republic of China> (2010 version), and social benefits, economic benefits and ecological benefits are remarkable.

The present application relates to a solar cell based on a composite nanostructured photoanode, the solar cell is a dye-sensitized solar cell, and the dye-sensitized solar cell includes a conductive substrate, a photoanode, a dye sensitizer, an electrolyte and a counter electrode, wherein, The photoanode and the counter electrode are arranged on the conductive base and opposite to the package, the surface of the photoanode is adsorbed with a dye sensitizer, and the electrolyte is a liquid electrolyte, which is arranged between the photoanode and the counter electrode; The first absorption layer, the scattering layer and the second absorption layer; wherein, the first absorption layer is a ZnO nanowire layer, the scattering layer is a WO3 particle layer, and the second absorption layer is a TiO2 particle layer.

The invention provides a dendrobium officinale tea and a preparation method thereof. The dendrobium officinale tea comprises, in parts by weight, 40-70% of superfine powder of dendrobium officinale and 30-60% of tea powder, wherein the particle size of the superfine powder of dendrobium officinale is greater than or equal to 600 meshes. The application further provides a preparation method for the dendrobium officinale tea. The dendrobium officinale tea provided by the application is good in taste, and capable of enabling a human body to much directly and efficiently absorb effective ingredients in dendrobium officinale and tea plants, and effectively alleviating the sub-health states of human bodies. The preparation method for the dendrobium officinale tea provided by the application comprises the following steps: drying and dehydrating the cleaned dendrobium officinale, and carrying out superfine grinding on the dried dendrobium officinale to obtain superfine powder; adequately mixing the superfine powder with the tea powder in parts by weight to obtain the dendrobium officinale tea. The method is simple to operate, capable of furthest reserving the effects of dendrobium officinale, and convenient to use due to small packages.

The invention discloses a method for preparing a silicon-oxide-supported bismuth titanate photocatalyst for photocatalytic degradation of pollutants. The invention aims to uniformly support a bismuth titanate catalyst on a silicon oxide supporter surface in a high-temperature sintering mode to obtain the material with optimal degradation capacity. The silicon-oxide-supported bismuth titanate photocatalyst is prepared by an improved sol-gel preparation technique; and the method comprises the following step: by using bismuth nitrate and tetra-n-butyl titanate as precursors, preparing the high-supporting-capacity high-activity high-stability silicon-oxide-supported bismuth titanate photocatalyst by sol-gel and calcination processes. The keys of the preparation process are refinement of the sol-gel technique and optimization of calcination conditions. The method has the advantages of simple technique, mild conditions and favorable repetitiveness, can be widely used for photocatalytic degradation of organic pollutants, and has wide application prospects in the aspect of environmental treatment.

The invention discloses a wave pushing plate bi-directional driving rotation-type wave energy power generation device which comprises a wave energy collection system, a wave energy conversion system, a gear power generation system, a closed box body control system and a base. The wave energy collection system is connected with the closed box body control system through a hinge point, the wave energy collection system is connected with the wave energy conversion system through a hinge support, the wave energy conversion system is connected with the gear power generation system through a gear shaft, the gear shaft is fixed on the closed box body control system through a thrust bearing, and the closed box body control system is installed on the base through an inner meshing gear device. According to the wave pushing plate bi-directional driving rotation-type wave energy power generation device, the wave energy is used for driving the reciprocating motion of a wave pushing plate to be converted into the same-direction rotation motion of the wave pushing plate, accordingly, the wave energy is directly converted into the rotation energy, and the inertia of a rotation part is sufficiently used for driving a power generator to conduct continuous power generation. The wave pushing plate bi-directional driving rotation-type wave energy power generation device is exquisite in structure, few in transmission link and high in transmission efficiency, has high operational reliability, and additionally can rotate the position of a wave energy power generation device at random to adapt to various terrains and various wave directions.

Disclosed is a long-life photocatalyst deodorization device (1) which effectively excites photocatalysts over the entire surface of a photocatalyst sheet and is capable of maintaining deodorization performance over a long period. Substrates (5 and 7) upon which vent holes (4) have been provided are disposed in parallel, and upon at least one substrate (5) of the two substrates, LEDs (3) are mounted. Between the two substrates, photocatalyst sheets (6) constituted by woven glass fiber material (6A) carrying photocatalyst particles (6B) and a frame (6C) supporting the material are disposed. The photocatalyst sheets and the two substrates are fixed to a housing (8), whereupon emitting surfaces of the LED light sources for exciting the photocatalysts and the photocatalyst sheets are disposed in parallel. Air fed from the vent holes is caused to pass through the photocatalyst sheets. The photocatalyst sheets are constituted by bundling glass fibers and weaving the fibers in a crisscross manner so as to have a predetermined aperture ratio such that ventilation is possible under low wind speed. The photocatalyst particles are mechanically held in contact between the glass fibers of the photocatalyst sheets.

The invention discloses a preparation method of a barium ferrite-ferroferric oxide composite wave-absorbing material. The preparation method comprises the following steps: preparing a (001) direction-oriented BaFe12O19 flaky powder by virtue of a molten salt method first, and then enabling Fe3O4 to grow on the BaFe12O19 which is used as a matrix by adopting a hydrothermal method, thereby preparing the barium ferrite-ferroferric oxide two-phase composite wave-absorbing material. The preparation process provided by the invention is simple in operation and short in period, the diameter of the prepared flaky barium ferrite-ferroferric oxide is about 2[mu]m, the size is uniform, and the microwave absorptivity of the flaky barium ferrite-ferroferric oxide has certain improvement.

The invention discloses a device for drying agricultural products. The device for drying agricultural products comprises a frame and a vibratory conveying mechanism mounted on the frame, a microwave drying system and a hot air drying system, wherein the microwave drying system comprises a microwave drying chamber and a microwave source; the microwave source is connected with the microwave drying chamber through a microwave energy reclaiming structure; the hot air drying system is communicated with the bottom of the microwave drying chamber; and the vibratory conveying mechanism penetrates through the microwave drying chamber so as to enable the agricultural products to penetrate through the microwave drying chamber in sequence and dry through the microwave drying chamber and the hot air drying system. Through the device for drying agricultural products, the advantages of dynamic and even drying characteristics of fluidized drying are combined with the advantages of high moisture and low cost of hot air drying and the advantages of rapidity and high efficiency of microwave drying, so that the aim of efficient, energy-saving, rapid, even, high-quality, high-yield and continuous drying is achieved; and the finished product ratio of the product is improved.

The invention discloses a solar panel control method which comprises the following steps of: (a) using a computer and establishing a coordinate system; (b) arranging a spherical hinge in the center of the bottom surface of a solar panel for supporting, respectively arranging one auxiliary support rod at the negative ends of the east-west direction and the north-south direction of the solar panels, arranging one vertical rack at each positive end of the solar panel, and arranging two motors to respectively drive one gear to be respectively engaged with the two vertical racks, wherein the two motors are connected with the computer and controlled by the computer; (c) taking a picture of the sky by using an imaging device, (d) analyzing the taken picture to obtain the coordinate position of the brightest point of the image in the coordinate system; and (e) calculating by using the computer according to the coordinate position of the brightest point in the image, and controlling the two motors to drive the solar panel to rotate to the position right against the brightest point in the sky through the gear and the racks. The invention has the advantages of accurate tracking and high reliability.

The invention discloses a production method of 2.5 mm photovoltaic module ultrathin tempered coated glass. Deep processing is carried out on a 2.5-mm ultrathin solar photovoltaic glass sheet with extremely low iron content, and an automatic deep processing flow production line is planned and assembled through the advanced production process. A specially-made toughening furnace is used for being matched with a corresponding sheet feeding machine, an edge grinding machine, a coating machine, a glass cleaning machine, a sheet discharging machine, a driller, a driller cleaning machine, a power supply and distribution system and a pure water circulating system to carry out deep processing on 2.5-mm ultrathin solar photovoltaic glass, and the 2.5 mm ultrathin tempered coated photovoltaic module glass meeting the requirement of the market is manufactured.

There is disclosed an air deodorizing device for use in a refrigerator or a freezer. The air deodorizing device comprises a honeycomb structure disposed between a pair of permeable walls. The honeycomb structure has a plurality of honeycomb pores which extend between the permeable walls. The honeycomb pores are evenly filled with activated carbon. Also disclosed is a method of manufacturing the same.

A landing supporting mechanism of an asteroid lander comprises an unfolding locking mechanism, a cantilever structure and a landing buffer. The unfolding locking mechanism is connected with the lander. The cantilever structure and the unfolding locking mechanism are connected through a rotating shaft and rotate around the rotating shaft. The landing buffer is fixedly connected with the cantileverstructure. The unfolding locking mechanism provides rotation power for rotation of the cantilever structure through driving force springs; after the unfolding locking mechanism moves to the assigned position, locking is conducted; and when the lander starts to touch the bottom, the landing buffer conducts buffering and speed reduction till the lander finally stably lands. The landing supporting mechanism can be used for meeting a series of specific function requirements of asteroid spacecrafts in the future, and the function realization, weight reduction and miniaturization design of spacecraft products is achieved.

The invention relates to a coal anaerobic mining method which comprises the following steps: step 1, mine sealing: each of a main shaft and an auxiliary shaft of a mine is sealed to a sealed state, so that an atmospheric environment inside the mine is isolated from a ground atmosphere; step 2, coal anaerobic mining: oxygen concentration and gas concentration in the mine are monitored in real time, underground mining personnel wears a respirator to start with coal mining when the oxygen concentration inside the mine is reduced to be 5 percent or lower, and the gas concentration is kept above the upper limit of an explosion limit, and in the mining process, arranged oxygen concentration monitoring probes and an inert gas injection system are matched to monitor the oxygen concentration in real time, so that the oxygen concentration is controlled to be 5 percent or lower, and the coal mining is finished. The coal anaerobic mining method provided by the invention is suitable for various types of mines, can completely avoid the occurrence of underground gas explosion, coal dust explosion, underground fire and other major safety accidents and effectively guarantee personnel safety; the operation method is simple, and the initial investment cost and the mine production cost are greatly reduced; meanwhile, the greenhouse gas emission is reduced, so that the environment is protected.

The invention relates to hydrazine waste gas absorption liquid, which comprises the following main components in percentage by weight: 0.01-15 percent of citric acid, 0.01-1.0 percent of potassium sorbate, 0.01-45 percent of calcium chloride, 0.01-45 percent of calcium nitrate, 0.01-45 percent of sodium nitrate, 0.01-20 percent of acetic acid and the balance of water; and preferably, the hydrazine waste gas absorption liquid further comprises following main components in percentage by weight: 0.01-45 percent of at least one of ethylene glycol and alcohol. The absorption liquid is prepared by following steps: adding water with volume half of that of the absorption liquid to be prepared in a container, starting a stirrer, sequentially adding, the citric acid, the otassium sorbate, the calcium chloride, the calcium nitrate, the sodium nitrate, the ethylene glycol, the alcohol and the acetic acid, adding water again to the volume to be prepared after all solid materials are added, continuously stirring for 30 minutes and stopping, and filtering residuals and insoluble matters after standing for one hour, thus obtaining clear liquid, namely, the absorption liquid.

The invention discloses a solar panel tracking control method comprising the following steps: a, adopting a computer and building a coordinate system; b, arranging a spherical hinge to support the central position of the bottom surface of a solar panel, respectively arranging an assistant strut bar on the negative terminal of the east-west direction and the north-south direction of the solar panel, respectively arranging a vertical rack on the positive terminal of the solar panel, and arranging two motors to respectively drive one gear to be meshed with two vertical racks, wherein two motors are both connected with the computer and controlled by the computer; c, shooting the sky by imaging equipment; d, analyzing the shot image, and obtaining the coordinate position of the lightest point in the coordinate system; and e, according to the coordinate position of the lightest point in the image, calculating by the computer and controlling two motors to drive the solar panel to rotate to the position just against the lightest point in the sky by the gear and the rack. The invention has the advantages of accurate tracking and high reliability.

The invention discloses a nano-porous energy absorbing material as well as a preparation method and application thereof. The nano-porous energy absorbing material is prepared from nano-porous molecular sieves and functional fluid, wherein the nano porous molecular sieves are uniformly dispersed in the functional fluid, are treated molecular sieves and are one and a combination of more than one of ZSM-5, ZSM-22, beta, mordenite, Y, MCM-41 and SBA15; the functional fluid is one or a combination of more than one of water, ethylene glycol, glycerol and lubricating oil. By using the nano-porous material obtained by the preparation method disclosed by the invention, pore volume, aperture, specific surface and solid-liquid interface characteristics of the nano-porous material can be adjusted; in addition, the prepared nano-porous material has the advantages of small crystalline grains, stable performance and simple process; after the prepared nano-porous material is matched with the functional fluid, a corresponding energy absorbing system can be configured according to different application fields, and further maximum absorption of impact energy is reached.

The invention discloses an amorphous silicon germanium thin-film solar cell having a double-layer interface band gap buffer layer. The amorphous silicon germanium thin-film solar cell comprises an electrode I, an n-type doped amorphous silicon thin film, an n-i buffer layer, a continuously variable band gap intrinsic (i type) amorphous silicon germanium thin film, an i-p double-layer band gap buffer layer, a p-type doped amorphous silicon thin film and an electrode II which are successively prepared on a substrate; and the electrode I and the electrode II are respectively a bottom electrode and a top electrode of the cell. A digital flowmeter is controlled through a computer, the continuously variable band gap amorphous silicon germanium thin film is prepared, and hole transmission is effectively increased; and, through adoption of the double-layer band gap buffer layer structure, energy band mismatching of a p-type window layer and the amorphous silicon germanium thin film is reduced, and then recombination of carriers at an interface defect state is reduced. Furthermore, the invention provides a method for preparing a micro-nano structure on a back reflection electrode, the optical paths of light rays in the cell can be increased, and then light absorption is increased.

The invention discloses an intelligent LED advertisement window with a solar tracker comprising a window body, a power supply, a central controller, an LED display screen, a solar photovoltaic panel and a communication module. The central controller, the LED display screen, the solar photovoltaic panel and the communication module are electrically connected to the power supply. The window body is transparent and is provided with a hollow inner cavity. The hollow inner cavity of the window body is provided with the LED display screen. The solar photovoltaic panel is movably connected to the edge of the window body. The solar tracker is installed on the top of the solar photovoltaic panel. The solar tracker rotates along with the rotation of the sun. The communication module is used for receiving advertisement information and transmitting the information to the central controller. The LED display screen is controlled by the central controller to display the advertisement information. The solar tracker moves along with the movement of the sunshine so that the solar photovoltaic panel can absorb sunshine to the fullest and provide enough electric energy for the LED display screen.

The invention discloses a femtosecond laser double-pulse glass welding strength enhancing system device, and belongs to the technical field of ultrafast laser. According to the technical scheme, an ultra-short pulse laser beam is divided into two cross beams which are perpendicular to each other through a spectroscope, the two cross beams are focused on the interface of a to-be-welded glass product, a computer conducts online monitoring, layered scanning is conducted according to a preset scanning path, an electric control one-dimensional motion platform is controlled to precisely regulate and control the delay time of the two beams of pulses, the scanning speed of ultrafast laser pulses generated by a high-repetition-frequency ultrafast laser is regulated and controlled, femtosecond laser single-pulse light beams are modulated to be converged at the connecting position of the to-be-welded glass product and spread towards the deep position of a to-be-welded glass product material, by adjusting the femtosecond laser pulse energy and scanning track parameters, and a melting effect is formed on the surface of the connection interface of the glass product to obtain molten pools with absorption effects of heat affected zones of different sizes, so that the to-be-welded laminated glass is welded together, and a compact welding seam is formed after cooling.

The invention relates to the technical field of solar thermal power generation and discloses a selective absorption cavity heat collector. The selective absorption cavity heat collector comprises a heat collecting cavity body and a selective absorption coating coated at the heat absorption surface of the heat collecting cavity body; the selective absorption coating comprises a metal reflection layer and a semiconductor absorption layer formed on the metal reflection layer. The selective absorption cavity heat collector overcomes the fatal defect of the low absorption rate of a semiconductor material for a solar energy spectrum and fully plays the advantages that the semiconductor can be provided with a cutoff slope and has small negative influence on the low infrared emittance of a good metal, so the high-temperature, efficient and spectrum selective heat collector which can furthest absorb the solar energy spectrum and inhibit the infrared radiation under the high-temperature condition is formed.

The invention relates to a treatment solution for hydrazine waste liquid, and the treatment solution comprises the following main components: 0.1-20% of hydrogen peroxide, 0.01-1.0% of potassium sorbate, 0.1-20% of acetic acid, 0.1-10% of phosphoric acid, 0.01-1% of sodium selenate, and the balance of water. The treatment solution is prepared by the following steps: adding water with a volume being about half of the liquid volume of the treatment solution to be prepared into a container, starting a stirring device, adding hydrogen peroxide, potassium sorbate, acetic acid, phosphoric acid, and sodium selenate sequentially, and adding water to achieve a volume to be prepared after all the solid materials are added; continuing to stir for 30 min and stopping; allowing the solution to stand for 1 h, filtering to remove residues and insoluble substances so as to obtain a clear solution which is the treatment solution.

The invention discloses an energy-saving high-efficiency nano mixed liquid sectional radiator. The energy-saving high-efficiency nano mixed liquid sectional radiator comprises a chassis, a radiating box combination, a steam cooling device, a conveying pump combination, a particle damping device and a control electric box, wherein the radiating box combination consists of a mixing box and a fan, the mixing box is mounted on the top side wall of the chassis through bolts, a return pipe is arranged on the top side wall of the mixing box, one side of the mixing box is provided with a steam exhaustpipe and a water inlet pipe from top to bottom, and one side of the mixing box is provided with a fan cover. According to the energy-saving high-efficiency nano mixed liquid sectional radiator, the volume in an exchange cavity is periodically changed, so that the steam at the top in the mixing box can be guided into an exchange envelope by an inlet one-way valve, the low-temperature condensed water in the exchange cavity can be sent back into the mixing box by an outlet one-way valve, meanwhile, a laser transmitter on a piston head can emit the laser, and according to the principle of Dopplereffect and atomic energy level quantization of light, the laser can cool down violently-moving water molecules, the steam saturation is reduced, and the heat exchange capacity is improved.

The invention provides a diatomite air humidity regulator. A preparation method of the diatomite air humidity regulator relates to the field of chemical product. The main preparation material is diatomite, which has unique porous structure and strong absorption affinity. During the preparation process, salt sintering aid and soda ash cosolvent are added into the diatomite, and the mixture is sintered into blocks; then the sintered blocks are crushed into irregular granular shape and prepared into a regulator capable of regulating air humidity effectively. The sintered blocks still keep the characteristic of strong absorption affinity of the diatomite and have increased contact area with air, so as to absorb vapor in air to the largest extend and reduce humidity of environment surrounding people. When the air is dry, the air humidity regulator can automatically release moisture therein, thereby finally realizing application effects of adjusting humidity balance of air surrounding human body, adjusting breathing circulation and improving sleep environment obviously.

The invention discloses a wireless communication box based on smart home, and relates to the technical field of smart home, comprising a first cover plate, a communication box body and a second coverplate, wherein both sides of the outer surface of the communication box body are fixedly installed with protective rubber pads, embedded long rod screws are fixedly inserted at front corner edges of the front surface of the first cover plate, and the embedded long rod screws penetrate the first cover plate, the communication box body and the second cover plate in order from the front to the rear,and are fixed installed with lock nuts. The invention also discloses a monitoring method for a wireless communication box based on smart home, comprising five steps. The wireless communication box isconvenient for adjusting the inclination angle of the solar photovoltaic panel so as to maximize the solar absorption rate, reduce the cost loss and save the use cost, facilitates the installation anddisassembly of the heat dissipation fan, has the advantages of high intelligence, strong versatility and high anti-interference ability, and can detect the signal strength information in the box in real time to facilitate the user to control the wireless communication box.

The invention relates to an efficient and flexible interaction distributed energy waste heat utilization system and a work method thereof and aims at solving the supply and demand contradiction between a supply side and a user side and the running problem. The efficient and flexible interaction distributed energy waste heat utilization system comprises a prime motor, a first-stage smoke-water heatexchanger, a lithium bromide unit, a second-stage smoke-water heat exchanger, a regulating system, a heat pump and a hot water distributor. The prime motor, the first-stage smoke-water heat exchanger, the lithium bromide unit and the second-stage smoke-water heat exchanger are sequentially connected, and the prime motor, the lithium bromide unit and the second-stage smoke-water heat exchanger areconnected with the user side. A cylinder jacket water outlet of the prime motor is connected with the lithium bromide unit, the first-stage smoke-water heat exchanger is connected with the heat pump,the first-stage smoke-water heat exchanger and the second-stage smoke-water heat exchanger are connected with the user side through the hot water distributor, and the heat pump is also connected withthe user side. By means of the efficient and flexible interaction distributed energy waste heat utilization system and the work method thereof, on one hand, the distributed energy efficiency is effectively improved, on the other hand, the steam supply problem is solved, and great social benefits and economic benefits are achieved.

Disclosed is a long-life photocatalyst deodorization device (1) which effectively excites photocatalysts over the entire surface of a photocatalyst sheet and is capable of maintaining deodorization performance over a long period. Substrates (5 and 7) upon which vent holes (4) have been provided are disposed in parallel, and upon at least one substrate (5) of the two substrates, LEDs (3) are mounted. Between the two substrates, photocatalyst sheets (6) constituted by woven glass fiber material (6A) carrying photocatalyst particles (6B) and a frame (6C) supporting the material are disposed. The photocatalyst sheets and the two substrates are fixed to a housing (8), whereupon emitting surfaces of the LED light sources for exciting the photocatalysts and the photocatalyst sheets are disposed in parallel. Air fed from the vent holes is caused to pass through the photocatalyst sheets. The photocatalyst sheets are constituted by bundling glass fibers and weaving the fibers in a crisscross manner so as to have a predetermined aperture ratio such that ventilation is possible under low wind speed. The photocatalyst particles are mechanically held in contact between the glass fibers of the photocatalyst sheets.

The invention discloses an aluminum profile cooling and separation device. The device comprises a base table; multiple support columns are fixedly arranged on the base table; a conveying mechanism, acooling mechanism and a recovery mechanism are fixedly arranged at the upper ends of the corresponding support columns; the cooling mechanism comprises a cooling pipe, and two pressurized water tankssymmetrically arranged; multiple air blowers are symmetrically arranged on the side walls of an inlet of the cooling pipe; and multiple water spraying pipes are arranged on the side walls of the two pressurized water tanks. The device is novel in structure, can achieve higher cooling efficiency under the condition of arranging fans with the same power, and reduces the energy consumption and the production cost; meanwhile, through arrangement of a guide plate, the kinetic energy after spraying of cooling liquid is improved to accelerate the cooling liquid to penetrate through vapor films on thesurfaces of aluminum profiles; and high-temperature aluminum profiles are quickly cooled by using the heat exchange effect of the cooling liquid.

The invention discloses an omnibearing lighting solar water heater comprising a water storage container, a water heater bracket, evacuated solar collector tubes of which the opening ends are communicated with the lower part of the water storage container, a sunlight baffle plate arranged below the evacuated solar collector tubes, a sewer tube communicated with the water storage container and a breather tube arranged on the top of the water storage container; the water storage container is spherical, and the evacuated solar collector tubes are in a tapered structure so that the lighting area of the solar collector tubes can be conveniently increased; in addition, the evacuated solar collector tubes are distributed in an umbrella shape and are arranged in each direction of the solar water heater so as to obtain the sunlight for the solar water heater in all the directions, increase the lighting efficiency, and maximally absorb solar energy. An automatic water supplier is added to the solar water heater so that the automatic water supply of the solar water heater is realized, the solar water heater is convenient to control and the waste of water resources is reduced.

The invention discloses equipment for dissolving a nitrate solution. Nitrate comprises nitrate ions and metal ions. The nitrate liquor is dissolved by the equipment to obtain a nitric acid solution and metallic oxides. The equipment comprises a concentration device, a calcination device and an absorption device. The concentration device is used for concentrating stock solutions, the calcination device is used for calcinating second concentrated solutions, and the absorption device is used for absorbing nitric acid in acid gases. The concentration device comprises a first filter, a second filter and an evaporation and concentration device. The ratio of filtration media of the first filter to the molecular weight is larger than or equal to interception rate of 1000 substances which is larger than or equal to 99%. The ratio of filtration media of the second filter to the molecular weight is larger than or equal to the interception rate of 100 substances which is larger than or equal to 99%. A first filtrate outlet of the first filter is communicated with a liquid inlet of the second filter. A first concentrated-solution outlet of the second filter is communicated with a liquid inlet of the evaporation and concentration device. A second concentrated-solution outlet of the evaporation and concentration device is communicated with a liquid inlet of the calcination device. An acid-gas outlet of the evaporation and concentration device is communicated with a gas inlet of the absorption device.

The invention discloses a preparation method of a shell powder artistic coating material capable of removing formaldehyde. The method comprises the following steps: S1, preparing the following raw materials in parts by weight: 200-400 parts of water, 20-30 parts of a soluble propylene glycol copolymer, 5-10 parts of a soluble dispersant, 2-5 parts of a soluble defoaming agent, 0.5-2 parts of a soluble preservative, 0.5-2 parts of a soluble wetting agent, 100-250 parts of shell powder, 40-80 parts of a soluble vegetable gum, 150-250 parts of soluble titanium dioxide, 2-4 parts of a soluble absolute ethyl alcohol copolymer, 5-25 parts of a soluble sodium stearate copolymer, 2-5 parts of a soluble alkaloid copolymer, 0.5-3 parts of a soluble cellulose copolymer, 20-40 parts of a soluble coloring agent, 1-4 parts of a soluble water reducing agent and 0.5-2 parts of a soluble thickener; and S2, screening the shell powder through a sieve mesh, so that the impurities contained in the shell powder can be removed, the shell powder with large particles can also be screened and removed, and the quality of shell powder raw materials is guaranteed. According to the invention, the shell powder artistic coating material does not contain harmful gases such as formaldehyde and the like, can be combined with a mesh macromolecule film-forming material for use, and has an adsorption effect on indoor harmful gases such as formaldehyde and the like, so that harm to a human body due to harmful gases such as formaldehyde and the like can be avoided.