586results about How to "Achieve recycling" patented technology

A bio-based artificial quartz stone and a production process thereof are disclosed. The bio-based artificial quartz stone includes the following components by weight: 0-80% of quartz sand; 10-70% of quartz powder; 3-20% of curable resin; 0.05-3% of a curing agent; 0.01-40% of lignin; 0-5% of a crosslinking agent; 0.05-5% of a coupling agent; 0-1% of a promoter; 0-2% of a pigment; and 0-3% of a defoaming agent. According to the invention, the lignin is used in the artificial quartz, the environmental pollution of the lignin is reduced, the cost of the artificial quartz is reduced, and at the same time the weather resistance and light stability of the artificial quartz are improved, thus the artificial quartz has antibacterial ability, is green and environmental-friendly, and is suitable for using in building decoration of living environments.

The invention discloses a separating method of glyphosate in the mother liquid with glyphosate through film technique, which comprises the following steps: separating the mother liquid with large amount of glyphosate; adjusting pH value between 2 and 11; entering one-grade film separation when the water polluting index is not more than 5; collecting the liquid in the reserving groove when the glyphosate percentage at dense side reaches 2-5%; continuing separating when the glyphosate percentage is below 2% in the condensate; entering the one-grade penetranting liquid with rich salt into two-grade film separation; returning the two-grade condensate into the one-grade film separation; entering the two-grade penetranting liquid with rich salt into three-grade film separation; returning the three-grade condensate into two-grade film separation; draining large amount of salt along with three-grade penetranting liquid.

The invention relates to the technical field of an energy-saving charging and discharging test on cells, and specially, relates to a method for energy-saving charging and discharging of cells and a system for testing energy-saving charging and discharging of cells. When all cells are in a charging state, power is sent from an electrical network and orderly passes through a direct current-alternating current transformation unit, a direct current-direct current transformation unit and the cells. When all the cells are in a discharging state, power is sent from the cells and orderly passes through the direct current-direct current transformation unit, the direct current-alternating current transformation unit and the electrical network. When cell charging powder and cell discharging powder are unequal, the powder unbalance is adjusted by the direct current-alternating current transformation unit and the electrical network. In the invention, charging and discharging of cells are realized simultaneously. Powder produced by cell discharging is fed back to an electrical network so that powder cyclic utilization is realized and powder-saving effects are obtained. A part of the cells are in a charging state and the other part of the cells are in a discharging state so that powder can be transmitted between the two parts without passing through the electrical network and thus powder cyclic utilization efficiency is improved; powder consumption is reduced; charging-discharging integration is realized; and operation processes are simple and efficient.

The invention discloses an automation carbon vending machine which is characterized by comprising an equipment cabinet, a main machine system (4), a touch screen (5), a metal keyboard (2), a label printer (6) and a coin collector (1), wherein the main machine system (4) and the label printer (6) are arranged inside the equipment cabinet, a panel in the front of the equipment cabinet is provided with the touch screen (5), the coin collector (1) is arranged inside the machine cabinet, and the inlet of the coin collector (1) is arranged below the touch screen. Each part is connected with a plurality of serial ports of the main machine system (4) through communication cables, and the main machine system (4) is connected with a server through the network. The automation carbon vending machine can calculate carbon discharge quantity of users, account recharge can be conducted in cash mode, batteries can be recovered automatically, models of the recovered batteries can be distinguished, internet communication of battery recovering information and the cash paper money receiving information is achieved, and the processes are in unattended operation.

The invention discloses a film distillation seawater desalting system by utilizing economical energy. The system comprises a film component, a seawater storage tank and a freshwater storage tank; the hot side of the film component is provided with a seawater inlet and a seawater outlet; the cold side of the film component is provided with a steam outlet; the seawater inlet of the film component is connected with an outlet of the seawater storage tank by a feed pump; the seawater outlet of the film component and the steam outlet are connected to the same heat pump; a seawater outlet of the heat pump is connected with the seawater storage tank; a freshwater outlet of the heat pump is connected with an inlet of the freshwater storage tank; and an inlet of the seawater storage tank is connected with a seawater heating system. The seawater outlet and the steam outlet of the film component of the desalting system disclosed by the invention are connected to the same heat pump, thereby realizing the recovery of steam heat by seawater, improving the energy using efficiency and saving manufacturing cost without needing specialized cooling equipment to condense steam.

The invention relates to a method for recycling high-purity fluorine and phosphorus from a wastewater of phosphogypsum residue field. According to the different reaction conditions of calcium fluoride and magnesium ammonium phosphate, the implementation of the method is divided into two stages: in the first stage of recycling high-purity calcium fluoride: adjusting the pH (Potential Of Hydrogen) value of the wastewater of the phosphogypsum residue field by a sodium hydroxide solution to 3-6 to enable the fluoride ions and calcium ions in the wastewater to be reacted to generate calcium fluoride precipitate, filtering and recycling calcium fluoride; and the second stage of recycling high-purity magnesium ammonium phosphate: adjusting the pH value of the wastewater after the first section of recycling high-purity calcium fluoride by the sodium hydroxide solution to 7.5-9.5, adding a magnesium source and an ammonia source at the same time, generating magnesium ammonium phosphate, magnesium ammonium phosphate analogs or phosphate compounds in a crystalline state in a magnesium ammonium phosphate crystallization reactor, filtering and recycling magnesium ammonium phosphate. The water treated by the method disclosed by the invention has low impurity content and can be directly used as the industrial water and circulating cooling water in a phosphorus chemical production system.

The system includes generator, vapor - vapor injector, compressor, condenser, expansion valve, evaporator, vapor - liquid injector, and heat exchange tube etc. In procedure of using air condition, refrigeration in jet type driven by residual heat of tail gas is always operated; and compressor to compress refrigerant supplies deficient cool quantity. The said two methods share same set of condenser, evaporator, and expansion valve. Based on current refrigerating system, the invention uses residual heat of tail gas by adding few parts and cost so as to realize energy saving. Comparing prior art, the system saves energy about 10úÑ for general saloon car, and saves more energy for saloon cars in large and middle size. Features are: no moving part, simple and reliable.

The invention aims at providing a passive safety shell cooling system comprising a water tank, an inner evaporator pipe bundle, a steam-water separator and an outer air cooler, wherein the water tank is positioned in an annular cavity formed by an inner-layer concrete safety shell and an outer-layer concrete safety shell; the outer air cooler is positioned between the dome of the inner-layer concrete safety shell and the dome of the outer-layer concrete safety shell; both an inner evaporator and the steam-water separator are positioned inside the inner-layer concrete safety shell; two ends of the inner evaporator are respectively connected with the steam-water separator through two pipes; the steam-water separator is connected with the outer air cooler through a first pipe extending out of the inner-layer concrete safety shell; and the inner evaporator pipe bundle is communicated with the water tank through a second pipe extending out of the inner-layer concrete safety shell. When accidents such as LOCA (Loss Of Coolant Accident) and MSLB (Main Steam Line Break) occur, the passive safety shell cooling system can be used for safely and reliably conducting heat out of the safety shell for a long term, ensuring the temperature inside the safety shell, and guaranteeing that pressure is no more than a limiting design value, thereby maintaining the integrity of the safety shell.

The invention relates to a steam condensation recovery structure for a steam box. The steam condensation recovery structure comprises a condensation device and a steam generator. The condensation device comprises a condensation body with a steam inlet, an exhaust port and a condensate outlet, a condensation cavity and a water storage cavity are formed in the condensation body and are communicatedwith each other through a water guide groove, the steam inlet and the exhaust port are formed in the condensation cavity, and the condensate outlet is formed in the water storage cavity and communicated with the steam generator via fluid. Compared with the prior art, the steam condensation recovery structure can effectively avoid the situation that as moisture in steam is carried to external spacealong with gas, deterioration of the external use environment of the steam box is caused, and the use experience of a user is affected; besides, the structure can achieve moisture recycling, so thatthe single use time of the steam box is prolonged.

The invention provides a method for recycling a waste and old nickel-plated rare-earth-iron-boron series permanent magnet material. The method comprises the following steps of: (1) treating the surface of the waste and old nickel-plated rare-earth-iron-boron series permanent magnet material; (2) mechanically crushing the surface-treated waste and old nickel-plated rare-earth-iron-boron series permanent magnet material to obtain mixed particles with 1-50 mm particle size; (3) performing hydrogen absorption treatment on the particles in anaerobic environment to obtain a nickel layer and rare-earth-iron-boron series permanent magnet material powder with 0.01-5 mm particle size, and recovering the nickel layer through screen separation; (4) adding an auxiliary material into the rare-earth-iron-boron series permanent magnet material powder, and performing ball milling or jet milling after uniform mixing to obtain mixed powder with 0.1-100 mum particle size; and (5) performing oriented formation, sintering and tempering heat treatment on the obtained mixed powder. The method provided by the invention has the advantages of simple process, low cost and no environmental pollution.

The invention belongs to the accumulator charging repairing technology field, specially an accumulator charging repairing system with electrical energy recycling and method thereof. The repairing system is composed of a battery repairing table, a battery rapid test table, a battery multifunction test table, a low voltage bus, a compensating charger, an emergency discharging load, a power supply system monitor, an energy storage battery group, a PC, a multi-access communication module and a barcode scanner, characterized in that: the battery repairing table, the battery rapid test table, the battery multifunction test table and energy storage battery group are connected to the low voltage bus. The energy storage battery group recycles and stores the electricity energy when the battery discharges through the low voltage bus. The electricity energy is provided by the energy storage battery group when needed to repair the battery. The electricity energy stored when discharging is recycled; the compensating charger automatically starts to charge the low voltage bus battery group when the volume of the power supply bus is not enough. The invention is scientific, rational, high efficient, active and has great economic benefit.

The invention provides an energy recovery vibration attenuating system for a cantilever frame, which is characterized in that the energy recovery vibration attenuating system has an energy recovery state and a vibration attenuating state and comprises a piezoelectric energy converting device and an energy storing device, wherein the piezoelectric energy converting device is connected with a cantilever frame and can carry out the corresponding conversion of energy according to an operating state of the energy recovery vibration attenuating system; and the energy storing device is connected with the piezoelectric energy converting device by a power converting device and can store or release the energy according to the operating state of the energy recovery vibration attenuating system.

The invention provides a non-wood raw material clean pulping method. Main agents used in the invention comprise a bio-enzyme, an alkaline salt, a surfactant-1, a surfactant-2, an oxidant and the like. The non-wood raw material pulping method comprises a step 1 of raw material pretreatment, a step 2 of kneading devillicate, a step 3 of pulping dipping, a step 4 of defibering pulping; a step 5 of pulp refining, a step 6 of enhanced bleaching, a step 7 of screening, and a step 8 of wastewater reuse, wherein the above pulping agents are used in the step 1 and the step 3. The pulping agents provided in the invention are utilized to pulp non-wood raw materials, and the non-wood raw materials mainly comprise cotton stalks, Caragana microphylla, Salix cheilophila, bamboos, reeds and the like. Compared with traditional alkaline pulping methods, the pulping method provided by the invention has the advantages of substantial yield increase, great whiteness increase, realization of recycling the pulping agents, reduction of the consumption of chemical agents, and reduction of the environmental pollution.

The invention discloses a device for measuring a permeability coefficient of concrete. The device comprises a water tank, a positioning water drum, a water outlet, a measuring drum, a telescopic water permeating support, a transparent cylinder with scales, a water overflowing opening, an upper water collection opening, a water pump and a water pipe, wherein the positioning water drum is positioned on the water tank; the water outlet is formed in the side face of the positioning water drum; the measuring drum is correspondingly arranged below the water outlet; the telescopic water permeating support is positioned in the positioning water drum and is used for holding a concrete test block; the transparent cylinder with scales sleeves the concrete test block; the water overflowing opening is formed in the side face of the transparent cylinder with scales; the upper water collection opening is formed in the part, corresponding to the water overflowing opening, on the water tank; the water tank is connected with the water pump; the water pump is connected with the water pipe to supply water to the transparent cylinder with scales. The device can measure both the permeability coefficient of a concrete varying head and the permeability coefficient of a concrete fixed head; meanwhile, the device is easy to assemble and disassemble and convenient to actually operate, and has energy-saving and environment-friendly effects since water can be recycled.

The invention relates to a method for preparing an alloy of titanium, silicon and aluminum by using the carbothermy reduction method, and is characterized in that titaniferous slag, titaniferous ore or mixture of the titaniferous slag and the titaniferous ore are taken as raw titaniferous materials, and a carbonaceous reducing agent is added for mixing and milling; a caking agent is added for mixing, and titaniferous pellets are prepared and parched; the titaniferous pellets, silicon ore and the carbonaceous reducing agent are mixed according to a proportion that is required by a finished product so as to prepare charging materials; the prepared charging materials are placed into an ore-bearing electric arc furnace for smelting, thus obtaining the finished alloy product of titanium, silicon and aluminum. The method for preparing the alloy of titanium, silicon and aluminum by using the carbothermy reduction method uses titaniferous waste slag or gangue, adopts the carbothermy reduction method for directly preparing the alloy of titanium, silicon and aluminum in the ore-bearing electric arc furnace, thus lowering production cost and energy consumption, and having important meaning to the comprehensive utilization of the titaniferous slag and the titaniferous ore.

The invention relates to a method for recovering rare earth in neodymium-iron-boron waste by high-temperature and high-pressure leaching. The neodymium-iron-boron waste is subjected to oxidation roasting, hydrochloric acid high-temperature and high-pressure leaching, and oxidation and impurity removal purification on Fe2+ in a leachate so as to obtain a rare-earth chloride leachate; and the rare-earth chloride leachate can be used as a subsequent process and a product raw material, rare earth is obtained through extraction and separation, rare earth carbonate is prepared through precipitation,or rare earth oxide is prepared through precipitation-roasting. According to the method, a closed high-pressure reaction kettle is adopted as leaching equipment, so that the dynamic condition of theleaching process is excellent, the requirement for the particle size of the leached raw materials is low, a large amount of dust generated by the fine grinding process of the raw materials is avoided,the leaching rate of rare earth in the leaching process is high, the utilization rate of hydrochloric acid is high, no acid gas is discharged, energy is saved, and the environment is protected; and in addition, the method has the advantages of being short in process flow, simple in process conditions and low in recovery cost, and the method has considerable economic, social and environmental protection benefits for large-scale recovery of the neodymium-iron-boron waste.

The invention provides a process for recovering aluminium, iron and scandium from Bayer-process red mud powder. The process comprises the following steps: mixing the Bayer-process red mud powder with sodium carbonate, lime and carbon powder, and then carrying out high-temperature roasting to obtain a roasted product A; placing the roasted product A in an alkaline liquid and dissolving out, separating to obtain a leaching liquid B and a leaching residue B, and using the leaching liquid B for recovering aluminium; screening out magnetic minerals and nonmagnetic minerals from the leaching residue B through magnetic separation, and using the magnetic minerals for recovering iron; drying the nonmagnetic minerals, and then adequately mixing and roasting the nonmagnetic minerals with chlorides to obtain a roasted product C; directly leaching the roasted product C with water, filtering and then obtaining a leaching liquid D, that is, scandium-containing solution, and a leaching residue D; and using the leaching liquid D for recovering scandium. The invention provides a method for recovering scandium from Bayer-process red mud, for recovering elements such as scandium and aluminium, thus resource recycling is realized.

The invention discloses treatment technique of waste water generated in production of o-nitrophenol. The treatment technique comprises the following steps: firstly, pretreating waste water, entering a resin adsorption column for adsorption, desorbing the resin by adopting NaOH solution after the resin adsorption is saturated, adding acid into high-concentration desorption solution for acidizing so as to recover o-nitrophenol, wherein a low-concentration desorption solution sleeve is used for desorption, distilling and purifying the recovered o-nitrophenol, conducting hydrogenation and catalysis to produce o-nitrophenol; carrying out ozone oxidation, neutralization and decoloration on the waste water after being subjected to adsorption treatment, thereby becoming qualified salt water. After the technique is adopted, organic pollution of the waste water to water environment is lightened, the resource utilization can be realized, and the treatment technique has great economic values and practical values in treating the waste water generated in production of o-nitrophenol.

A double-effect vane secondary element, which is made up of a rotator, a stator, a vane, variable cylinder, a shell and a distributing plate. The variable cylinder is made up of a variable pole, variable piston, and variable shell. The variable shell is fixed on the shell through bolt, the sphere head of the variable pole is connected to the concave groove of the variable piston, another end of the variable pole is fixed on the external surface of the stator long radius arc center. The merits of the invention are: through the control to the stator position, the 'hydraulic motor' condition of the secondary element and the 'hydraulic pump' condition can convert each other, it realizes the reclaim and the reuse of energy.

The invention provides a method for preparing fatty acid by illegal cooking oil. Water is sent into a steam generator, the temperature is controlled to be 100-110 DEG C, pressure is controlled to be 0.10-0.15MPa, so that the water is evaporated into steam; illegal cooking oil is sent into a hydrolysis kettle, the temperature is controlled to be 200-250 DEG C, and the pressure is controlled to be 0.09-0.12MPa; and the steam is sent into the hydrolysis kettle at the flow of 200-250m3/h, and the illegal cooking oil and the steam are subjected to a hydrolysis reaction under high temperature condition, thus obtaining fatty acid, crude glycerine, oil and water. Water and oil are all returned to be recycled, not only no pollute is discharged, but also cost is saved, water resource consumption is reduced, the entire process is continuous, reaction velocity is high, flow is short, equipment is simple, investment cost is low, production process is clean, and the method is beneficial to environmental protection.

The invention provides a preparation method for low-viscosity poly-alpha-olefin synthetic oil. The preparation method comprises the following steps: subjecting raw materials to dehydration; then withBF3 alcohol or an organic acid complex as a catalyst, carrying out oligomerisation at a temperature of 0 to 100 DEG C and a pressure of 0 to 1.0 MPa; after completion of oligomerisation, subjecting areaction product to flash evaporation and separating a gas-phase BF3 catalyst; compressing the gas-phase BF3 for recycling, subjecting an oil phase to precipitation or centrifugation so as to separatethe complexation catalyst and poly-alpha-olefin lubricating oil, recycling the complexation catalyst, washing the oil phase with alkaline water; and carrying out pressure-reduced distillation on a clean intermediate product so as to separate monomers and dimmers, and then carrying out hydrotreatment so as to obtain saturated poly-alpha-olefin lubricating oil base oil.

The invention discloses a method for deep separation of vanadium and molybdenum, which comprises three steps of presetting of the pH value of a solution, adjustment of the ion state and resin ion exchange separation analysis. Firstly, a persulfate solution containing vanadium and molybdenum is adjusted to reach the proper value by using sulfuric acid, the oxidation reduction potential of the solution is adjusted through adding reducing agent and oxidizing agent, the valence states and ionic conditions of vanadium and molybdenum are adjusted, vanadium is reduced into V (IV) from V (V), and exists in the form of VO<2+>, molybdenum exists in the form of sexavalence anion, then obtained solution continuously passes through exchange columns of the strong-base anion exchange resin, the exchange speed is controlled as per the contact time of 20-30 minutes, the adsorption effect is adjusted according to the concentration of Mo of the effluent, and the loaded resin is recycled after being analyzed. The method has the advantages that through changing the existing valence states of vanadium and molybdenum, vanadium and molybdenum exist in different hydrated ion forms and through selective adsorption of the resin, the deep separation of vanadium and molybdenum can be realized.

The invention relates to an air-source heat pump air-conditioner heater, comprising in-out heating water system and air-conditioner system. The in-out heating water system is connected with the air-conditioner system. Said in-out heating water system comprises water tank, heat exchanger of water tank, water inlet port and water outlet port. The water inlet port of heat exchanger of water tank is connected with water inlet port by pipe and the water outlet port of heat exchanger of water tank is connected with water inlet port of water tank. The water outlet port of water tank is connected with the water outlet port. In the invention, because the structure that in-out heating water system is combined with the air-conditioner system is adopted; little electric power can be needed to drive the compressor run. Not only refrigerating and heating performance can be realized but also hot water is generated in cycle so as to realize energy recovery. It is provided with compact structure, low cost, convenience installment and maintenance. It can decrease energy consumption greatly and the thermal efficiency is improved greatly.

The invention relates to a method for preparing lignin sulfonate by utilizing residue from enzymatic hydrolysis of lignocellulose. The method comprises the following steps of: performing pretreatment on a lignocellulose raw material through a diluted acid method to get the residue from acid hydrolysis, performing enzymolysis with cellulase and xylanase to get the residue from the enzymatic hydrolysis, and further performing steam boiling and sulfonation on the residue from the enzymatic hydrolysis through a hydrosulphite process steam boiling technology to prepare a lignin sulfonate product. According to the method disclosed by the invention, the utilization rate of the lignocellulose raw material is improved, and the method further has better economic and social benefits.

The invention discloses a sludge treatment method. The method comprises steps as follows: sludge is injected into a reaction kettle, saturated steam is introduced into the reaction kettle, so that thesludge is subjected to a thermal hydrolysis reaction, and mud subjected to thermal hydrolysis is obtained; the obtained mud is injected into a filter press for mechanical filter-pressing dewatering,and a mud cake and filtrate are obtained; the obtained mud cake is put in a carbonization furnace to be carbonized, and biochar, pyrolysis gas and tar are obtained; a part of the obtained biochar is taken as a catalyst for the thermal hydrolysis reaction and back-mixed in the reaction kettle; the obtained pyrolysis gas and tar are subjected to dust removal and introduced into a pyrolysis gas steamboiler, and produced high-temperature steam is returned to the reaction kettle. By means of the method, the bio-char is taken as a raw material for the catalytic thermal hydrolysis reaction, the sludge hydrolysis efficiency can be improved, no chemical addition in the high-dryness dewatering process of sludge can be realized, and a new thought for sludge treatment is further expanded.

The invention relates to a construction material product produced by industrial solid waste and building refuse. The said product is prepared by material at the following weight ratio and method: 18-22 portion of fly ash; 38-46 portion of slag; 8-13 portion ofcoal slack; 8-13 portion of builders rubbish; 5-10 portion of lime; 1.5-6 portion of gypsum; 0.05-0.1 portion of binder. The said raw material is crushed into the particle size of 5mm, and after dry mixing each constituent, adding water and agitating, in-mold vibration and compression are performed to mould. After 12-24 hours of product maintenance and 5-7 days of dry wet curing, natural seasoning is ok. The invention maximizes improving the enviroment to realize the cyclic utilization of waste and regeneration of resource to make the cost lower and the range of building materials larger. The invention can produce building block, mark brick, insulating brick for building wall and also can produce gtound hardening series such as plaza brick, footpath brick; and also can producebearing wall material; and also can produce warming plate, plasterer mortar and the other building materials.

The invention relates to a preparation method of matrix for household sewage biological treatment technology, and in particular to a method for preparing a matrix for household sewage biological treatment technology by using rice husk activated carbon. The matrix is prepared by evenly mixing soil and rice husk activated carbon according to different mass ratio. The rice husk activated carbon adopted in the invention is prepared from an agricultural waste rice husk through activation by an activator, contains mesoporous and microporous structures, and has large specific surface area and strong adsorption capacity; the matrix prepared by uniformly mixing rice husk activated carbon and soil according to a certain proportion can be used to adsorb nitrogen and phosphorus in rural decentralized household sewage, not only can purify water but also can be applied to farmland as a fertilizer containing nitrogen and phosphorus rich, so as to realize the recycling of resources.

The invention discloses a method for recovering uranium-containing wastewater and uranium in underground water through high-efficiency electrochemical reduction enrichment. Metal electrodes are used as a cathode and an anode to construct an electrochemical system, and hexavalent uranyl ions are used to reduce electrons into tetravalent insoluble uranium dioxide, so the electrodes reduce hexavalenturanium into uranium dioxide and make the uranium dioxide enriched on the surfaces of the electrodes without an exogenous additive. A tetravalent uranium coating layer can further catalytically reduce hexavalent uranium in wastewater to form a new tetravalent uranium coating layer. The uranium dioxide enriched electrodes are taken out from the solution after the electrochemical reduction enrichment in order to realize high-efficiency reducing removal of the uranium in the wastewater and underground water. The electrodes are placed in a dilute nitric acid solution, and are oxidized to furtherrealize high-efficiency recovery. The method has the advantages of wide application range, and realization of high-efficiency removal and recovery of uranyl carbonate in low-concentration and high-concentration uranium-containing wastewater and carbonate-containing underground water.

The invention discloses a method for treating solid waste in a low-carbon mode and restraining generation of dioxin. The method for treating solid waste in the low-carbon mode and restraining generation of dioxin comprises the following steps that S1, solid waste is smashed; and S2, chemical looping combustion treatment is conducted on the smashed solid waste, wherein the chemical looping combustion temperature ranges from 800 DEG C to 1000 DEG C, oxygen carriers modified through an adsorbing agent is used for chemical looping combustion, the particle sizes of the oxygen carriers modified through the adsorbing agent is 0.1 mm-0.3 mm, the adsorbing agent can adsorb and fix gaseous chlorine elements and condensate and capture carbon dioxide obtained during chemical looping combustion. The method solves the technical problems that at present, during solid waste combustion, carbon emission is high, and dioxin is generated easily.

The invention discloses a method for recycling lithium carbonate from a lithium iron phosphate battery. The method comprises the following steps: (S0) discharging, decomposing and sorting the lithium iron phosphate battery and taking lithium iron phosphate powder; (S1) calcining under high temperature; (S2) performing oxidizing acid-pickling reaction, wherein the pH value is 0-1.5; (S3) filtering, thereby taking a filtrate I; (S4) adding alkali, regulating the pH value to be 2-4, filtering and taking the filtrate; (S5) adding alkali, regulating the pH value to be 8-11, filtering and taking the filtrate; (S6) performing evaporative crystallizing, sintering at 250-550 DEG C and taking the residual block powder; (S7) adding water for dissolving, filtering and taking the filtrate; (S8) dropwise adding a sodium carbonate solution, thereby acquiring lithium carbonate. According to the method, the technological process is simple, the cost is low, lithium iron phosphate batteries can be recycled in batches and the yield and the purity of lithium carbonate are high.