227results about "Ammonium sulfates" patented technology

The invention belongs to the technical field of solid waste control, and particularly relates to a VOCs catalyst based on manganese slag, a preparation method and application of the VOCs catalyst and a manganese slag resource utilization method. The method comprises the following steps: mixing manganese slag with a sulfuric acid solution, and carrying out solid-liquid separation to obtain a washing solution and washing slag; mixing the washing solution and the carbonate aqueous solution, and sequentially carrying out precipitation reaction, standing and solid-liquid separation to obtain a precipitate and a separation solution; roasting the precipitate to obtain a roasted substance, washing the roasted substance with an organic acid solution and water in sequence, and then drying to obtain a purified product; mixing the purified product, a binder and water to obtain a mixed material; the mixed material is subjected to extrusion molding and then dried, and the VOCs catalyst based on the manganese slag is obtained. According to the method, resource utilization of metal elements in the manganese slag is achieved, and the excellent VOCs catalytic oxidation effect is achieved on the premise that the production cost of the catalyst is greatly reduced.

The invention relates to the technical field of preparation of nano aluminum oxide, in particular to a preparation method of high-purity nano aluminum oxide, which comprises the following steps: dissolving aluminum ammonium sulfate in high-temperature hot water, filtering, recrystallizing, drying the recrystallized aluminum ammonium sulfate to remove moisture to obtain dried aluminum ammonium sulfate, and roasting the dried aluminum ammonium sulfate at high temperature to obtain the high-purity nano aluminum oxide. The preparation method comprises the following steps: calcining the alumina powder, decomposing to generate alpha-Al2O3 nano-alumina, simultaneously releasing ammonia gas and sulfur dioxide gas, introducing the ammonia gas and sulfur dioxide released in the roasting process into water through a negative pressure absorption device to generate an ammonium sulfate solution, and finally obtaining the superfine alumina powder with the particle size reaching the nanoscale. According to the method, the market value of the product is improved, ammonia gas and sulfur dioxide generated in the roasting process are absorbed to successfully generate a byproduct ammonium sulfate, and the byproduct ammonium sulfate is reused in a catalyst wet vanadium precipitation process, so that the environmental pollution is reduced, the output quality of aluminum oxide is improved, and the production loss caused by impurities is reduced, thereby improving the production efficiency and economic benefits.

The present invention provides a method and device system for preparing sodium carbonate and / or sodium bicarbonate and co-producing ammonium sulfate from sodium-based wastewater. According to the phase equilibrium law of a multi-component water-salt system, through the regulation of crystallization kinetics and supersaturation, the sodium-based wastewater does not need to be evaporated and crystallized to produce sodium sulfate solid. Instead, the wastewater after simple pretreatment is directly treated to achieve gradient crystallization separation of sodium sulfate, ammonium sulfate and sodium bicarbonate, thereby obtaining high-quality sodium bicarbonate, sodium carbonate and ammonium sulfate products.

The invention discloses an ammonia desulfurization system and method based on zone control. The ammonia desulfurization system comprises a desulfurization tower, an absorption circulating tank, an ammonia water tank, a rinsing tank and a process water tank. The desulfurization tower is sequentially provided with a flue gas outlet, a demisting section, a second-section absorption layer, a first-section absorption layer and a concentration section from top to bottom. A partition plate is arranged in the absorption circulating tank and divides the absorption circulating tank into an upper oxidation tank and a lower absorption circulating section. An aeration pipe is arranged in the upper oxidation tank, and the upper oxidation tank is connected with a spraying liquid inlet of the second absorption layer through a pipeline; the lower concentration section of the desulfurizing tower is connected with the oxidation tank through a liquid conveying pipeline. The water washing tank supplies water to the demisting section and the absorption circulating tank; the ammonia water tank supplements ammonia water to the oxidation tank, the first-section absorption layer and the lower absorption circulation section respectively; recycled liquid of the demisting section is connected back to the rinsing bath through a pipeline. According to the invention, absorption and oxidation are partitioned in the same tank, so that coupling interference is eliminated; two-stage absorption and demisting recovery are matched, so that ammonia escape is effectively controlled while efficient removal of sulfur dioxide is guaranteed.

The present application relates to the technical field of ammonia compound preparation, in particular to a method for preparing ammonium sulfate and co-producing sodium bicarbonate by using sodium sulfate, comprising the following steps: mixing industrial-grade liquid ammonia with deionized water to prepare ammonia water with a free ammonia concentration of 60-120 ti (ti is the abbreviation of titer, which is 1 / 20 mol / L), controlling the temperature of the mixing process to be less than or equal to 40 DEG C to avoid ammonia volatilization, pre-carbonizing by passing in CO2 under the conditions of 20-70 DEG C and a carbon dioxide pressure of 0.1-0.6 MPa, and adding sodium sulfate or a mixture of sodium bicarbonate and mirabilite to obtain a pre-carbonized liquid. The present application adopts an integrated process of pre-carbonization, clarification, carbonization, ammonia separation and low-temperature crystallization, and ammonia evaporation circulation, and can be operated continuously or intermittently, has low industrial implementation difficulty, strong running stability, separates ammonium sulfate by using ammonia separation and low-temperature crystallization technology, replaces the traditional evaporation and concentration process, combines material recycling design, and reduces the energy consumption per unit product compared with the traditional process.

The invention provides a process for the preparation of sul furic acid and minerali zation of CO2 from industrial gases, comprising : CO2- absorption step, comprising continuously sparging C02- containing gas through an aqueous solution of ammonia in a first reactor, or continuously sparging C02-containing gas and ammonia gas through water, to form [ (NH4 ) 2CO3 / NH4HCO3 ] solution; continuously withdrawing [ (NH4 ) 2CO3 / NH4HCO3 ] solution from the first reactor and providing said [ (NH4 ) 2CO3 / NH4HCO3 ] solution, after it has been optionally cooled, to a second reactor, wherein NH3 and CO2-bearing gas stream discharged from the first reactor is fed to the second reactor, thereby producing (NH4 ) 2CO3 aqueous solution in the second reactor and releasing an essentially NH3 and CO2- free gas from the second reactor; CO2-minerlai ztion step, comprising reacting the (NH4 ) 2CO3 in water with calcium sul fate [ CaSO4 ], to form a solution of ammonium sul fate [ (NH4 ) 2SO4 ] and precipitate solid calcium carbonate [ CaCO3 ], separating CaCO3 from said solution and recovering ammonium sulfate crystals from the solution; and H2SO4- format ion step, comprising thermally decomposing the (NH4 ) 2SO4 to give sul furic acid and supplying a stream of ammonia released from the thermally decomposed (NH4 ) 2SO4 to the CO2-absorption step.

The application discloses a process for preparing high-molecular-ratio cryolite and ammonium sulfate by using fluorine-containing etching waste liquid, and comprises the following steps: adding sodium metaaluminate slurry and sodium sulfate solution into the fluorine-containing etching waste liquid, then adjusting pH to be acidic by using a sulfuric acid solution, carrying out heating reaction, then carrying out centrifugal separation treatment, and drying the obtained cryolite precipitate; adding sodium metaaluminate slurry into the fluorine-containing supernatant, and obtaining defluorination filtrate by treatment; adding a sulfuric acid solution into the defluorination filtrate, carrying out neutralization reaction, then carrying out vacuum evaporation on the reaction mixture containing ammonium sulfate, carrying out centrifugal separation treatment after cooling, drying the obtained ammonium sulfate precipitate, and obtaining ammonium sulfate product. The fluorine ion in the fluorine-containing etching waste liquid can be effectively utilized, the generated cryolite product can reach the national standard of high-molecular ratio, the fluorine ion content of the generated filtrate is less, so that the filtrate can enter the synthesis of ammonium sulfate, and no waste liquid is generated in the process.

The present disclosure relates to new methods and processes of byproduct conversion, wastewater remediation, byproduct upcycling / recycling, and sustainable cyclic methods thereof.

The invention relates to a method for recovering a magnesium element from a magnesium-containing solution and application thereof, and relates to the technical field of wastewater treatment. According to the method, magnesium precipitation separation is achieved through the steps of alkalization, carbonization, flash decomposition and the like, and basic magnesium carbonate, active magnesium oxide and ammonium sulfate with high additional values can be recycled.

The present application belongs to the technical field of pharmaceutical production, and particularly relates to a method and device for preparing L-magnesium aspartate by selective ion replacement electrodialysis. The present application uses a selective ion replacement electrodialysis device to convert an intermediate product of industrial L-aspartate production, L-ammonium aspartate, to prepare L-magnesium aspartate. The selective permeability of the ion exchange membrane is used to realize the replacement of cations in two different electrolytes, so that the ions are recombined to form L-magnesium aspartate. Thus, the deficiencies of the prior art process of first preparing L-aspartate and then preparing L-magnesium aspartate are avoided. The purity of the L-aspartate prepared according to the present method and the conversion rate of the L-ammonium aspartate both reach more than 97%, and the energy consumption is low. The L-magnesium aspartate product with high purity can be quickly prepared, and the by-product ammonium sulfate can also be obtained in the product chamber 2, thereby improving the economic benefits of the process and having important industrial application value.

A process for the synthesis of hydrogen by catalytic cleavage of ammonia; the process comprising the step of subjecting an ammonia-containing stream (10) to a catalytic cleavage step (11) in the presence of heat to produce a combustion gas and a hot cleavage stream (14) containing nitrogen, hydrogen and potentially residual ammonia, and optionally water; the process further comprising the step of subjecting the hot cleavage stream to a hydrogen recovery step to produce a high-purity hydrogen stream (22).

The utility model discloses a chemical waste gas treatment device, belongs to the technical field of chemical waste gas treatment, and solves the problems of low efficiency and incomplete treatment of an existing waste gas treatment method. The input end of the alkaline waste gas collecting induced draft fan is communicated with the alkaline waste gas collecting pipe, and the output end is communicated with the input end of the pickling tower. The output end of the pickling tower and the output end of the alkaline washing tower are both communicated with the input end of the biological treatment unit, the output end of the biological treatment unit is communicated with the input end of the activated carbon adsorption tower, the output end of the activated carbon adsorption tower is communicated with the input end of the air exhaust induced draft fan, and the output end of the air exhaust induced draft fan is communicated with the input end of the coal-fired boiler. The output end of the coal-fired boiler is communicated with the input end of the denitration unit, the output end of the denitration unit is communicated with the input end of the bag-type dust removal unit, the output end of the bag-type dust removal unit is communicated with the input end of the desulfurization unit, and the output end of the desulfurization unit is communicated with the input end of the cyclone. The chemical waste gas treatment device can efficiently and thoroughly treat chemical waste gas.

The present application belongs to the technical field of energy saving and consumption reduction of titanium dioxide production, and particularly relates to a method for energy saving and pollution reduction in the calcination process of sulfuric acid method titanium dioxide. The present application realizes the cascade utilization of high-temperature to medium-low-temperature waste heat through the integrated scheme of "preheating and quality improvement + oxygen-rich calcination + tail gas synergistic desulfurization and denitrification + resource utilization of by-products", that is, the calcination tail gas (1000-1100℃) is first used to generate steam for production through a waste heat boiler, and then is used for preheating and drying metatitanic acid after being cooled, thereby realizing the cascade utilization of high-temperature to medium-low-temperature waste heat, and simultaneously, the oxygen-rich combustion improves the fuel efficiency, the natural gas combustion is more sufficient, the energy consumption per unit product is reduced by 30-40%, and the ammonia method is used to simultaneously remove SO2 and NO x in a single reactor, the desulfurization efficiency is greater than or equal to 95%, the denitrification efficiency is greater than or equal to 85%, the concentration of dust in the tail gas after being removed by a bag filter is less than or equal to 10 mg / Nm3 for emission, the unity of environmental benefits and economic benefits is realized, and a new path is provided for the green upgrading of the sulfuric acid method titanium dioxide industry.

This invention relates to a method for the resource utilization of ammonia-containing waste generated during beryllium smelting, belonging to the technical field of wastewater and waste residue treatment and resource utilization. The method includes: mixing aluminum ammonium vanadium slag with beryllium washing wastewater; mixing the resulting aluminum ammonium vanadium beryllium solution with a calcium-containing transforming agent to obtain aluminum-calcium slag and aluminum ammonium vanadium purified solution; mixing solution A with beryllium precipitation wastewater and adding a calcium-containing alkaline substance to obtain a conditioning solution and gypsum slag; adding a decalcifying agent to the conditioning solution for precipitation and decalcification to obtain decalcified slag and decalcified solution; stripping the decalcified solution to obtain ammonia water and ammonia stripping mother liquor; solution A is an aluminum ammonium vanadium beryllium solution and / or aluminum ammonium vanadium purified solution; or, mixing the aluminum ammonium vanadium purified solution with beryllium precipitation wastewater and evaporating and crystallizing to obtain ammonium salts. This method fully utilizes the ammonia resources in the ammonia-containing waste generated during beryllium smelting, preparing ammonium salts or ammonia water, achieving full recycling of ammonia nitrogen in the production process.

The invention relates to the technical field of ammonia compound preparation, in particular to a method for preparing ammonium sulfate and co-producing sodium bicarbonate by using sodium sulfate, which comprises the following steps: mixing industrial liquid ammonia with deionized water to prepare ammonia water with the free ammonia concentration of 60-120ti (ti titer abbreviation, namely 1 / 20mol / L), and controlling the temperature to be less than or equal to 40 DEG C in the mixing process to avoid ammonia volatilization, cO2 is introduced for pre-carbonization under the conditions that the temperature is 20-70 DEG C and the pressure of carbon dioxide is 0.1-0.6 MPa, sodium sulfate or a mixture of mirabilite and sodium bicarbonate is added, and a pre-carbonization solution is obtained; the process adopts an integrated process of pre-carbonization, clarification, carbonization, ammoniation low-temperature crystallization and ammonia distillation circulation, can be continuously or intermittently operated, is low in industrial implementation difficulty and high in operation stability, separates ammonium sulfate through an ammoniation and low-temperature crystallization synergistic technology, replaces a traditional evaporation and concentration process, is combined with a material cyclic utilization design, and has a good industrial application prospect. The unit product energy consumption is reduced compared with the traditional process.

The utility model discloses an ammonium sulfate and monoammonium phosphate mixed solution evaporative crystallization salt separation treatment system which comprises a preheating unit, an ammonium sulfate evaporation concentration unit, an ammonium sulfate evaporation crystallization unit, a recovery heat exchange unit, an ammonium sulfate post-treatment unit, a monoammonium phosphate cooling crystallization unit, a monoammonium phosphate post-treatment unit and a carnallite treatment unit. According to the technical scheme adopted by the utility model, a mixed solution containing ammonium sulfate and monoammonium phosphate is subjected to combined treatment, so that qualified ammonium sulfate crystal salt, monoammonium phosphate crystal salt and mixed salt can be obtained, and the by-product benefit of a wastewater treatment system can be effectively improved.

The invention discloses a reactor suitable for ammonium sulfate crystallization, and relates to the technical field of ammonium sulfate crystallization. The reactor suitable for ammonium sulfate crystallization comprises a crystallization tank, a heat exchange tank communicated with the crystallization tank, and a heat exchange plate installed in the heat exchange tank and communicated with a water conveying pipe, and the crystal removal assembly comprises a crystal removal plate located outside the heat exchange plate, under the driving of the driving element, crystals formed on the surface of the heat exchange plate are scraped to become seed crystals for growth of the crystallizing tank; the temperature sensor is fixed on the crystal removal plate and is used for detecting the temperature of the surface of the corresponding heat exchange plate and providing a basis for the operation of the switching assembly; and the expansion area is fixedly mounted in the crystal removal plate, deforms under the action of external force to be adaptive to the shape of the heat exchange plate and is adaptively attached to the outline of the whole heat exchange surface, so that dead-corner-free scraping is ensured, uniform pressure is kept, and a product with high quality, uniform granularity and good fluidity can still be produced after the scraped ammonium sulfate crystals continuously grow in the main body solution.

The invention belongs to the technical field of mirabilite resource utilization, and particularly relates to a mirabilite resource utilization method based on micro-nano bubble enhanced mass transfer. The method comprises the following steps: (1) dissolving mirabilite solid waste with water or carrying out concentration treatment on mirabilite waste water to enable the concentration of sodium sulfate to be close to a saturated state so as to obtain a mirabilite solution; (2) firstly introducing ammonia gas in a micro-nano bubble form into the mirabilite solution in the step (1) to form a sodium sulfate solution system rich in dissolved ammonia, and then continuously introducing carbon dioxide in the micro-nano bubble form to carry out a crystallization precipitation reaction; (3) carrying out solid-liquid separation on the reaction material in the step (2), and washing and drying the solid phase to obtain a sodium bicarbonate product; adding sulfuric acid into the liquid phase to react to convert the dissolved sodium bicarbonate into sodium sulfate, then performing concentration-crystallization treatment on the solution to obtain an ammonium sulfate crystal product, and recycling the residual mother liquor in the step (1). According to the method, a high-purity sodium bicarbonate product and a high-purity ammonium sulfate product can be simultaneously obtained through a simple process.

The invention discloses a method for treating nickel precipitates in ammonium sulfate solution and belongs to the field of metallurgy and chemical engineering. The method combines free nickel ions into a stable organic nickel complex precipitate by sequentially adopting a combination of pretreatment, ammonium sulfide nickel precipitation, oxidation and complex breaking, and fenammonium nickel solidification, and finally removes the nickel precipitate by simple filtration. The method can effectively prevent the nickel precipitate from dissolving, solves the problem of excessive heavy metal content caused by the dissolution of heavy metal nickel precipitates in ammonium sulfate solution, and makes the salt product of the purified ammonium sulfate solution reach the GB535-1995 superior product quality standard through evaporation and crystallization, thereby improving economic benefits and avoiding environmental pollution, and having high application value.

This invention discloses a system for the co-production of ammonium sulfate and calcium carbonate from phosphogypsum mineralization flue gas and carbon dioxide. The system includes a reactor, a circulating pump, a hydrocyclone separator, a three-stage cooler, an absorption tower, and a three-stage heat pump system. The reactor is used to introduce phosphogypsum slurry, ammonia, and CO2-containing flue gas to form a mixed slurry. The circulating pump is used to input the mixed slurry into the hydrocyclone separator, which separates the mixed slurry into an upward overflowing fluid and a downward swirling fluid. The three-stage cooler is used to cool the first fluid from 60-65°C to 18-20°C in stages. The absorption tower is used to absorb CO2 from the CO2-containing flue gas. The three-stage heat pump system is used to exchange heat with the three-stage cooler and input the heat exchanged heat into the reactor, maintaining the reactor temperature at 60-65°C. This invention solves the technical pain points of the one-step phosphogypsum mineralization technology, which requires high temperatures for the phosphogypsum conversion reaction and low temperatures for CO2 absorption.

The invention discloses a treatment device and a treatment method for acid tar in ammonium sulfate production by a saturator method, and belongs to the technical field of coking. The treatment device comprises a full flow tank, an acid tar conveying inclined pipe, an acid tar heating tank, a conveying pump and a mechanical clarifying tank, an outlet of the full flow tank is connected with one end of the acid tar conveying inclined pipe through a pipeline, an ammonia water conveying inlet is formed in the acid tar conveying inclined pipe, and the other end of the acid tar conveying inclined pipe is connected with the acid tar heating tank; a steam heating pipe inlet is formed in the bottom of the side wall of the acid tar heating tank; a liquid outlet in the bottom is connected with the mechanical clarifying tank through a delivery pump. The inclined angle of the acid tar conveying inclined pipe is set, ammonia water generated by coking is jointly introduced to clean acid tar adhered to the pipe wall, meanwhile, steam is introduced into the acid tar heating tank to melt the acid tar, and finally, precipitation separation is performed in the mechanical clarifying tank, so that the environmental pollution is obviously reduced, the labor intensity of post personnel is reduced, and the production efficiency is improved. And the problem of acid tar treatment is effectively solved.

The invention discloses a method for transforming a rare earth material containing sulfuric acid and recovering ammonium sulfate, which comprises the following steps: 1) mixing the rare earth material containing sulfuric acid, an ammonia precipitant I and a slurry to react to obtain a reaction product I, and carrying out solid-liquid separation on the reaction product I to obtain a first-stage filter cake and a first-stage immersion liquid; 2) mixing and reacting the first-stage filter cake, an ammonia precipitator II and the mixed slurry to obtain a reaction product II, and carrying out solid-liquid separation on the reaction product II to obtain a second-stage filter cake and a second-stage immersion liquid; 3) mixing and reacting the second-stage filter cake, an ammonia precipitator III and the mixed slurry to obtain a reaction product III, and carrying out solid-liquid separation on the reaction product III to obtain a third-stage filter cake and a third-stage immersion liquid; and 4) reacting the third-stage filter cake with an acidic solution to obtain a rare earth chloride solution. The transformation efficiency of the rare earth can be remarkably improved, and the energy consumption of wastewater treatment is effectively reduced.

The invention discloses a resource utilization method for preparing calcium aluminate through aluminum ash denitrification aluminum extraction-calcium roasting, and belongs to the technical field of aluminum ash resource processing. The method comprises the following steps: carrying out dry grinding on raw material aluminum ash to realize monomer dissociation to micron size, sieving, carrying out wet grinding on the obtained aluminum ash fine powder in a water-containing medium for denitrification, and sieving to recover metal aluminum and obtain aluminum-rich slag slurry; the aluminum-rich slag slurry is subjected to solid-liquid separation and soluble salt leaching treatment, and purified aluminum-rich slag is obtained; and the purified aluminum-rich slag is subjected to high-temperature calcium roasting, and the calcium aluminate system steelmaking refining slag with 12CaO. 7Al2O3 as the main crystalline phase is obtained. According to the method, physical separation, wet chemical reaction and pyrogenic calcination are combined for cooperative treatment, harmful elements such as nitrogen and fluorine can be efficiently removed, the aluminum ash of metal aluminum in the aluminum ash can be recycled, and harmless treatment, zero waste and all-component high-value utilization of the aluminum ash are achieved.

The invention discloses a lithium source impurity removal method, lithium phosphate and a preparation method thereof, and belongs to the technical field of battery materials. The invention solves the problem of how to provide a method for preparing high-purity lithium phosphate from a lithium source in lithium ore. The method comprises the step of removing impurities from a lithium source, and specifically comprises the following steps: roasting lithium ore, and leaching a product obtained after roasting to obtain a lithium sulfate solution; adding one or more of ammonia water, ammonia gas or liquid ammonia into the lithium sulfate solution to adjust the pH value to 8-11, and then filtering to obtain primary purified mother liquor; adding monoammonium phosphate or / and diammonium phosphate into the primary purified mother liquor, adjusting the pH value to 8-11 again, reacting under the stirring condition, and filtering to obtain secondary purified mother liquor; and adding EDTA (Ethylene Diamine Tetraacetic Acid) into the secondary purified mother liquor to obtain the lithium sulfate purified mother liquor. And adding one or more of ammonia water, ammonia gas or liquid ammonia into the monoammonium phosphate solution to adjust the pH value to 8-11, and adding the purified lithium sulfate mother liquor into the monoammonium phosphate solution to obtain the high-purity lithium phosphate.

The application discloses a kind of green treatment recycling methods of vanadium precipitation wastewater, belong to chemical industry.Green treatment recycling methods of vanadium precipitation wastewater include the following steps: removing metal impurity ions from sodium vanadium extraction vanadium precipitation wastewater, then adding calcium oxide and passing compressed air to remove ammonia, ammonia gas generated by ammonia removal is absorbed to obtain ammonium sulfate solution, calcium sulfate is calcined to generate calcium oxide and sulfur dioxide, and further prepared sulfuric acid, after ammonia removal, the wastewater is passed into carbon dioxide to generate sodium bicarbonate, evaporation concentration is obtained sodium bicarbonate solid and condensate, and the residual concentrated slurry returns evaporation concentration process.In the process flow, the generated sodium bicarbonate returns the roasting process, the condensate returns the leaching process, the ammonium sulfate solution returns the vanadium precipitation process, and the calcium oxide returns the ammonia removal process.The green treatment recycling method of vanadium precipitation wastewater has the advantages of low cost, convenient operation, resource recycling, etc., and realizes the green treatment of vanadium precipitation wastewater.

The invention discloses ammonium sulfate wastewater MVR evaporator concentrated solution drying equipment which comprises an evaporation tank, a solution supply mechanism, a gas supply mechanism, a salting-out mechanism and an auger, a first partition plate is fixedly connected in the evaporation tank, and the evaporation tank is divided into an evaporation area and an equipment area by the first partition plate; the liquid supply mechanism comprises a liquid storage tank, a liquid conveying pump is fixedly installed on the liquid storage tank, and a first liquid conveying pipe is fixedly connected to the liquid conveying pump. Compared with the prior art, the ammonium sulfate wastewater MVR evaporator concentrated solution drying equipment effectively solves the problems of non-uniform heat transfer and slow drying of inner-layer materials, not only can improve the treatment efficiency of ammonium sulfate wastewater, but also can realize continuous feeding, drying and discharging, saves the periodic waiting time of traditional equipment, and has the advantages of low cost and high efficiency. The treatment capacity of the ammonium sulfate concentrated solution in unit time is greatly improved, the requirements of large-scale industrial production can be better met, and equipment support is provided for centralized and large-scale treatment of ammonium sulfate wastewater.

To manufacture granular ammonium sulfate with large grain diameter stably.SOLUTION: A manufacturing method of granular ammonium sulfate includes: reacting an ammonia-containing gas with a sulfuric acid aqueous solution to obtain an ammonium sulfate aqueous solution; introducing the ammonium sulfate aqueous solution to a crystal can; precipitating ammonium sulfate in the crystal can to obtain granular ammonium sulfate; and pulling a slurry containing the granular ammonium sulfate from a lower part of the crystal can. The manufacturing method of granular ammonium sulfate is characterized by that solid-liquid ratios at plural heights in the crystal can are measured and a pulling amount of the slurry is controlled based on the solid-liquid ratio.SELECTED DRAWING: Figure 1

The invention discloses an efficient treatment method and device for exhaust of inorganic gas tail gas in a test box, and relates to the technical field related to tail gas treatment.The method comprises the steps that inorganic gas in the test box is collected to obtain to-be-treated tail gas, and the to-be-treated tail gas is sensed and monitored to obtain tail gas information before treatment; introducing a tail gas evaluation mechanism to evaluate and analyze the tail gas information before treatment to obtain a tail gas treatment index; judging whether the tail gas treatment index is at a preset limit value; and if yes, activating the physicochemical duplex processor to treat the tail gas to be treated to obtain the tail gas to be discharged. The technical problems that in the prior art, inorganic tail gas of a test box is difficult to cooperatively discharge and treat, treatment parameters cannot be adaptively adjusted according to the concentration change of the tail gas, the tail gas treatment efficiency is low, emission does not reach the standard, and the environmental protection performance is insufficient are solved. The technical effects of intelligent regulation and control of tail gas treatment and accurate up-to-standard emission are achieved, and the tail gas purification treatment efficiency and the environmental protection performance are improved.

The utility model discloses an ammonium sulfate drying, spraying and water replenishing system which comprises a belt conveyor, a drying bed main body, a heat exchanger, a cyclone dust collector, a water washing dust collector and an evaporation raw water tank, one end of the heat exchanger is connected into heat source steam, the other end of the heat exchanger is connected into a condensation bolt pipe network, the heat exchanger inputs air through the air blower for heat exchange to form hot air, and the hot air enters the drying bed main body, passes through the cyclone dust collector and then passes through the washing dust collector for secondary dust removal. The system has the beneficial effects that the problems of tail gas dust and smell in the ammonium sulfate drying process can be solved, the problems of dust particles and hot gas drifting in the tail gas are solved, crystals in the tail gas are recycled, and particulate matter pollution caused by direct exhaust of the tail gas is reduced; the problem that other water is introduced is effectively avoided, the evaporation water amount of the system is reduced, and water resource consumption of a large amount of spraying water is avoided.

The invention discloses an automatic mother liquor level detection and supplement subsystem in a coked ammonium sulfate system, which relates to the technical field of ammonium sulfate production systems and is technically characterized by comprising a radar liquid level meter mounted above a full-flow tank to measure the liquid level; the steam heater uses water vapor as a heat source to heat nitrogen or dry compressed air to 40-80 DEG C; the anti-frosting protection nozzle is of an angle-adjustable rotary type, a protection film can be formed on the surface of the radar liquid level meter probe, and the hot anti-frosting protection gas conveying pipe conveys heating gas for the radar liquid level meter probe. A saturator mother liquor operation control valve and a mother liquor circulation operation control valve control on-off of mother liquor; the anti-freezing and anti-crystallization blocking circulating pipe is prevented from being frozen and blocked by mother liquor; spraying the mother liquor to a French spray saturator by a spray absorption nozzle; the replenisher flowmeter measures the flow, and the replenisher pump provides power; the device has the functions of liquid level height automatic detection and supplement, radar liquid level frosting prevention in winter and acid gas corrosion prevention.