132results about "Ammonium halides" patented technology

The invention discloses a resourceful treatment method for mother liquor in a glycine production process. The method comprises the following steps: introducing hydrogen chloride gas into mother liquor in a glycine production process to obtain hydrolysate; centrifugally separating the hydrolysate to obtain an ammonium chloride product, and treating the primary centrifugal filtrate in the next process; adding urea into the centrifugal filtrate for reaction, and after the reaction is completed, carrying out centrifugal separation to obtain a solid product urea-formaldehyde resin and a secondary centrifugal filtrate; the secondary centrifugal filtrate is heated, methyl alcohol in the filtrate is removed, methyl chloride is recycled, then heating continues, water in the filtrate is removed, evaporation condensate water is obtained, methyl chloride can be collected to serve as a by-product to be sold, the evaporation condensate water is reused for glycine production, and evaporation residual liquid serves as organic matter fertilizer to be treated. Under the condition of low energy consumption, impurities such as urotropin, ammonium chloride and methanol ammonia in the glycine mother liquor are separated, and resources such as urotropin, ammonium chloride and methanol in the mother liquor are recycled.

The invention provides a lithium bis (fluorosulfonyl) imide heavy slag treatment method which comprises the following steps: reacting bis (fluorosulfonyl) imide heavy slag to be treated with an aqueous solution of an alkaline compound to obtain a reaction solution containing a salt compound and ammonia gas; and recovering the reaction liquid to obtain the salt compound. By means of the method, resource recycling can be conducted on the lithium bis (fluorosulfonyl) imide heavy slag, economic benefits are improved, and the method has important significance in promoting sustainable development and circular economy.

The invention discloses a recycling method of NF3 residual electrolysis liquid, and relates to the technical field of residual electrolysis liquid recycling treatment. The method comprises the following steps: step 1, removing Fe ions in the electrolytic residual liquid: firstly, adding hydrogen peroxide or oxygen into the electrolytic residual liquid for reaction, oxidizing ferrous ions into ferric ions, then adding ammonia water and sodium hydroxide or ammonium bicarbonate and sodium hydroxide into the solution for reaction, precipitating ferric ions in the form of ferric hydroxide; 2, hydrofluoric acid is added into the electrolyte solution obtained after iron removal to adjust the pH of filtrate to 3-12, the filtrate enters an extraction system, the nickel element in ammonium hydrogen fluoride is extracted out, and ammonium hydrogen fluoride is purified; and step 3, the nickel element separated from the electrolyte enters a second section to be extracted and synthesized into a nickel sulfate product.

The invention provides a preparation process of an ultra-clean high-purity ammonium fluoride solution, and belongs to the technical field of preparation of electronic-grade chemicals. The microcapsule adsorbent is creatively introduced, various purification technologies are combined, the content of metal ions, particles and organic impurities in the ammonium fluoride solution is remarkably reduced, and the strict requirement of the semiconductor industry for high-purity chemicals is met. Wherein the hollow structure of the microcapsule adsorbent and the amide modified cyclodextrin have a synergistic effect, so that the microcapsule adsorbent is endowed with high specific surface area and strong adsorption capacity and has a strong adsorption effect on heavy metal ions and impurity particles, and the polyacrylate shell material enhances the stability of the microcapsule adsorbent in a strong acid / alkali environment. The traditional process has the problem of poor filtering effect and needs to use complex equipment (such as a centrifugal machine and an ultrafiltration device) for multi-step separation, while the method can achieve an efficient separation effect through conventional filtering operation, has the characteristics of high purification efficiency, convenience in separation, stable product quality and the like, and is suitable for industrial production.

The invention provides a special extracting agent for preparing monopotassium phosphate by a solvent extraction method, the extracting agent is composed of a main agent and an auxiliary agent, the main agent is N, N-diisooctyl ethanolamine and trioctyl methyl ammonium chloride, the auxiliary agent is xylene and C8-C16 alkane, the C8-C16 alkane is at least one of C8-C16 alkanes, and the volume ratio of the main agent to the auxiliary agent is (0.2-0.6): 1. The special extraction agent provided by the invention can improve the separation selectivity of hydrochloric acid and phosphoric acid while enhancing the extraction performance of hydrochloric acid, improves the separation performance of oil and water phases after extraction, avoids entrainment and shortens the phase separation time.

The present application specifically relates to the technical field of solid waste treatment. Disclosed is a method for preparing baking soda by using desulfurized fly ash. The method comprises: dissolution, coagulation-defluorination coupled precipitation defluorination, oxidative acidification, cooling crystallization, preparation of baking soda from sodium sulfate, reverse precipitation and preparation of baking soda from sodium chloride. In the present application, the industrial desulfurized fly ash is prepared into baking soda having a high added value by using an effective process, and the baking soda is reused in a desulfurization process, thereby achieving resource recycling of the industrial desulfurized fly ash. In addition, impurity ion COD, sulfite, carbonate, bicarbonate and fluorine ions, etc., in the desulfurized fly ash are comprehensively removed; and compared with a traditional process, the recycled baking soda has a higher purity and a higher recovery rate by means of process innovation.

The utility model relates to the technical field of anhydrous ammonium hydrogen fluoride preparation, and discloses a micro-channel reaction device for preparing anhydrous ammonium hydrogen fluoride, which comprises a raw material tank, a vaporizer, a micro-channel reactor and a shell-and-tube heat exchanger, two driving motors are mounted at the upper end of the micro-channel reactor, stirring rods are mounted at the lower ends of the driving motors through motor shafts, a plurality of stirring blades are arranged on the stirring rods, a micro-channel groove is formed in the middle in the micro-channel reactor, a plurality of channels are uniformly distributed in the micro-channel groove, and two catalysts are mounted at the bottom end in the micro-channel reactor. Two driving motors are started, the driving motors drive stirring rods to rotate through motor shafts, the flow speed of ammonium bifluoride gas is increased, multiple channels are formed in the micro-channel groove, the contact area and the retention time of reaction gas can be increased through the channels, the reaction efficiency is improved, the reaction gas reacts with other reactants under the action of a catalyst, and the reaction efficiency is improved. Anhydrous ammonium bifluoride and other byproducts are generated, so that the reaction is sufficient.

The invention relates to the technical field of solid waste recycling, and particularly provides a circulating fluidized bed system for gasification fly ash resourceful treatment and an aluminum oxide leaching method. The system comprises a hearth, a gas-solid heat exchange bed and an activation reactor. The gasified fly ash and a water glass binder are agglomerated and thickened through a fine powder agglomerator, incineration is conducted through a hearth, and ammonia gas is injected to fix heavy metal; the ash enters an activation reactor, a mullite structure is destroyed by utilizing residual carbon oxygen-enriched combustion (850-950 DEG C) of fly ash, aluminum ions are extracted through gradient acid leaching, acid leaching liquid is neutralized by ammonia water to precipitate aluminum hydroxide, and high-purity aluminum oxide (greater than 99%) and a byproduct ammonium chloride fertilizer are obtained through calcination; the escape rate of fine particles is lower than 10%, the leaching rate of aluminum oxide exceeds 85%, and the treatment cost is reduced by 50% or above compared with that of a traditional method.

The utility model discloses an ammonium bifluoride self-separation device which comprises a shell supported on the ground through a base, a feeding cylinder and a discharging cylinder are connected to the two ends of the inner wall of the shell respectively, a centrifugal cylinder is arranged between the feeding cylinder and the discharging cylinder, a screening plate is arranged on the outer wall of the centrifugal cylinder, and the screening plate is arranged on the outer wall of the shell. The two ends of the centrifugal barrel are rotationally connected with the feeding barrel and the discharging barrel correspondingly, a feeding hopper communicating with the feeding barrel is arranged at one end of the outer wall of the top end of the shell, the bottom end of the discharging barrel communicates with a solid discharging pipe, one end of the liquid cavity communicates with a liquid outlet pipe, a cavity is formed in the base, and a motor is fixed to the inner wall of the cavity. An output shaft of the motor is connected with a driving gear, and a driven gear meshed with the driving gear in a transmission mode is arranged on the outer wall of the centrifugal cylinder. According to the utility model, the feeding cylinder, the centrifugal cylinder, the feeding hopper and the discharging cylinder are arranged, so that the continuous separation of mother liquor and crystals is realized, and the production efficiency is improved.

The application discloses a method and system for preparing ammonium bifluoride from hydrofluoric acid waste liquid, which comprises the following steps: (1) adding the hydrofluoric acid waste liquid into an electrolytic cell, transporting the electrolytic cell to a first reaction kettle after electrodepositing treatment, adding silicon dioxide, then stirring and reacting, and returning the generated silicon tetrafluoride and hydrofluoric acid into a spray tower to react and then return to the first reaction kettle, and then adding ammonia water to perform neutralization reaction; (2) filtering the solid-liquid mixture I, evaporating and drying the obtained filtrate I to obtain an ammonium nitrate product, and returning the obtained filter cake I to a second reaction kettle, adding ammonia water to adjust the pH value, and then stirring and reacting; (3) filtering the solid-liquid mixture II, returning the obtained filter cake II to the first reaction kettle for reuse, transporting the obtained filtrate II to a reactor, adding hydrofluoric acid to perform reaction, and then performing evaporation and drying treatment to obtain an ammonium bifluoride product. The method is simple in process, low in energy consumption, convenient to operate and convenient for industrialized production and application.

The co-production and recovery process comprises the following steps: dissolving alpha-aminobutyric acid and potassium cyanate in water, and carrying out heating reaction to obtain an intermediate water solution; directly dropwise adding hydrochloric acid into the intermediate water solution, heating for reaction, cooling and filtering to obtain a main product filter cake and mother liquor; and drying the obtained main product filter cake to obtain the 5-ethyl hydantoin. Adding potassium hydroxide into the mother liquor to adjust the pH value, carrying out reduced pressure distillation until no distillate exists, adding ethanol, heating and filtering to obtain a potassium chloride filter cake and ethanol filtrate; concentrating and drying the ethanol filtrate, and recovering to obtain 5-ethyl hydantoin; washing the potassium chloride filter cake with ice water; drying the washed potassium chloride filter cake to obtain potassium chloride; and concentrating and drying the washing water after washing the potassium chloride filter cake to obtain the potassium chloride / ammonium chloride composite salt. According to the method, the product yield is increased, the waste liquid amount is reduced, and the production cost is further reduced, so that the method is very suitable for industrial large-scale environment-friendly production.

Systems and methods for in situ production of ammonia and / or ammonium salt compounds using subsurface geochemistry are provided. In some embodiments, one or more reactants can be transported to a subsurface region of the earth for the purpose of forming ammonia and / or ammonium salts in-situ. The reactants can contact a rock bed of ultramafic rocks to react to form hydrogen gas (H2). The hydrogen gas can then be reacted with a nitrogen source to form ammonia that can be collected. In alternate embodiments, the nitrogen gas can be pumped into contact with the hydrogen gas released from the rock bed to form ammonium salt in the earth's crust, which can be excavated. In some other embodiments, a catalyst can be transported along with reactants, or a reaction can be facilitated by a catalyst in the rock bed, to form ammonia gas in situ without hydrogen gas formation.

This invention belongs to the field of ammonium bifluoride purification technology, and specifically relates to a multi-stage filtration mechanism for ammonium bifluoride purification. The mechanism includes a tank with protective components on its outer surface, a discharge port at the bottom, a feed port on one side of the top, a motor in the center of the top, a rotating shaft at the motor's output end, a centrifugal drum at the bottom of the shaft, a flow guide platform below the centrifugal drum, and a bag filter at the bottom of the flow guide platform. This invention, through the cooperation of the motor, centrifugal drum, flow guide platform, bag filter, and activated carbon adsorption plate, enables the filtration mechanism to perform multi-stage filtration, avoiding the problem of poor impurity separation when filtration and purification of ammonium bifluoride in the liquid phase. Furthermore, the cooperation of the protective frame, rubber damping plate, rotating rod, and pressure relief cylinder prevents the surface of the device from easily denting or cracking after external impact.

The application discloses a neodymium-iron-boron secondary waste recycling method, which comprises the following steps: step 1, reacting neodymium-iron-boron secondary waste with acid solution, controlling the pH of the solution after reaction to be 0.5-1.5, and performing solid-liquid separation to obtain filter liquor A containing Fe 3+ and filter residue A; step 2, reducing Fe 3+ in the filter liquor A into Fe 2+ , performing solid-liquid separation to obtain filter liquor B and filter residue B; step 3, adjusting the pH of the filter liquor B to 2-6, performing solid-liquid separation to obtain filter liquor C and filter residue C; and step 4, reacting the filter liquor C with a precipitant, performing solid-liquid separation to obtain filter residue D and filter liquor D. The present application realizes short-process comprehensive utilization of oxalic acid, hydrochloric acid and iron resources, is friendly to the operation environment, does not need strong-acid and strong-alkali equipment, and can simultaneously realize green and efficient comprehensive utilization of iron-containing waste residue and oxalic acid wastewater.

The application discloses a recycling method of NF3 electrolysis residual solution and relates to the technical field of electrolysis residual solution recycling treatment. The method comprises the following steps: step 1: removing Fe ions in the electrolysis residual solution; first, hydrogen peroxide or oxygen is added into the electrolysis residual solution to oxidize the divalent iron ions into trivalent iron ions, and then ammonia water and sodium hydroxide or ammonium hydrogen carbonate and sodium hydroxide are added into the solution to react, so that the trivalent iron ions are precipitated in the form of iron hydroxide; step 2: the electrolyte solution after the removal of iron is adjusted to a pH of 3-12 by adding hydrofluoric acid, enters an extraction system, extracts the nickel element in the ammonium hydrogen fluoride, and purifies the ammonium hydrogen fluoride; and step 3: the nickel element separated from the electrolyte solution enters a second extraction to synthesize a nickel sulfate product.

The present application relates to the technical field of chemical devices, and in particular to a column reactor and a preparation method for bis(fluorosulfonyl)imide triethylamine salt. The column reactor comprises: a reactor main body which is provided with a gas outlet and a liquid outlet; a liquid inlet pipe arranged at the upper part of the reactor main body; a plurality of spaced column plates arranged in the reactor main body, at least one column plate being further away from the gas outlet than the liquid inlet pipe; a first gas inlet pipe arranged between any two adjacent column plates; a second gas inlet pipe arranged between any two adjacent column plates and further away from the liquid inlet pipe than the first gas inlet pipe; and a third gas inlet pipe arranged between any two adjacent column plates or mounted on the side, away from the liquid inlet pipe, of the column plate furthest away from the liquid inlet pipe, and further away from the liquid inlet pipe than the second gas inlet pipe, wherein at least one stirring mechanism is provided on at least one column plate. The at least one stirring mechanism is provided on the column plate, so that accurate temperature control is not required for the column reactor, thereby effectively improving the reaction yield.

The application discloses a method for recovering fluorine and triethylamine from fluorine-containing organic wastewater, and belongs to the technical field of fluoride preparation. The method adopts the synergistic effect of an organic phase of an extractant A and an extractant B under the condition that the pH is 0.5-4, realizes selective extraction of fluorine ions and inhibition of extraction of metal impurity cations under the premise that water-soluble triethylamine is not extracted through a one-step liquid-liquid extraction process, thereby realizing efficient and low-loss recovery of fluorine and triethylamine, and further preparing high-purity fluorides and triethylamine. The method has the advantages of short process, no need of complicated impurity removal process, high fluorine recovery rate, low production cost and the like.

The utility model provides a glycine crystallization regulation and control device, which relates to the technical field of glycine preparation and comprises a raw material tank filled with ammonification reaction liquid; the alcohol precipitation crystallization kettle is connected with the raw material tank; the first feeding pipe and the second feeding pipe are both connected with the alcohol precipitation crystallization kettle, and a pipeline flowmeter is arranged in the first feeding pipe; the radar liquid level meter is arranged on the alcohol precipitation crystallization kettle; the pH meter is used for monitoring the pH value of the material in the alcohol precipitation crystallization kettle; the pipeline flow meter, the radar liquid level meter and the pH meter are connected with the control system in a wired or wireless mode; wherein the first feeding pipe is used for adding methanol into the alcohol precipitation crystallization kettle, and the second feeding pipe is used for adding hydrochloric acid into the alcohol precipitation crystallization kettle. The glycine crystallization regulation and control device provided by the utility model can regulate and control the pH value to be close to a glycine isoelectric point in an alcohol precipitation process, and can track the adding amount of methanol in real time.

The invention belongs to the field of inorganic chemical industry, and particularly relates to a potassium carbonate production technology, in particular to a method for purifying a copper ion-containing pesticide synthesis byproduct potassium chloride and directly using the copper ion-containing pesticide synthesis byproduct potassium chloride to produce potassium carbonate. The method comprises the following steps: purifying a byproduct potassium chloride to obtain a refined byproduct potassium chloride solution V; conveying the refined byproduct potassium chloride solution V into a cation exchange resin bed, and carrying out ion exchange to respectively obtain a potassium bicarbonate solution and an ammonium chloride solution; the potassium bicarbonate solution and the ammonium chloride solution are subjected to evaporation, concentration, crystallization and centrifugal separation respectively, so that a potassium bicarbonate wet product and an ammonium chloride wet product are correspondingly obtained respectively; and calcining the potassium bicarbonate wet product at high temperature to obtain potassium carbonate. The method has the technical advantages of being low in energy consumption, free of waste water, free of newly-added pollutants and impurities and the like.

The utility model particularly relates to a process-simplified high-salinity wastewater zero-discharge synergistic saline-alkali land treatment device which is characterized in that the water outlet end of a high-salinity wastewater regulation reservoir is connected with the water inlet end of a wastewater pretreatment unit through a pipeline, and the water outlet end of the wastewater pretreatment unit is connected with the water inlet end of an RO (Reverse Osmosis) pre-concentration unit through a pipeline; the concentrated water end of the RO pre-concentration unit is connected with the water inlet end of the ultra-concentration RO membrane unit through a pipeline, the concentrated water end of the ultra-concentration RO membrane unit is connected with the water inlet end of the sodium sulfate saline water blending tank through a pipeline, and the water outlet end of the sodium sulfate saline water blending tank is connected with the inlet end of the double decomposition reaction device through a pipeline; and the discharge end of the double decomposition reaction device is connected with the compounding and mixing device through a pipeline. According to the utility model, the process is simplified, the investment cost is reduced, and the resource utilization rate is high.

The utility model relates to a zero-discharge recycling device for high-salinity wastewater taking sodium chloride as a main component, which comprises a high-salinity wastewater concentration device, a high-salinity wastewater recycling device, a high-salinity wastewater recycling device and a high-salinity wastewater recycling device, and the reactor is used for reacting the concentrated high-salinity wastewater with ammonium bicarbonate. The device comprises a first evaporation and concentration device, a first cold separation crystallizer, a second evaporation and concentration device and a second cold separation crystallizer. According to the utility model, the high-salt industrial wastewater is recycled as a raw material for preparing sodium bicarbonate, so that the device is an economical and environment-friendly wastewater recycling method. According to the utility model, sodium chloride and ammonium chloride are extracted by using mother liquor after sodium bicarbonate production, and condensed water generated by evaporation can also be used as product washing water, so that the device is a green and pollution-free technical method for harmless treatment and resource utilization of wastewater, zero emission and circular economy are really realized, and no wastewater is generated in the whole process.

The production method according to the present disclosure comprises a firing step for firing a mixed material comprising a compound containing Y, a compound containing Gd, NH4α, Liβ and Caγ2 under an inert gas atmosphere, in which the compound containing Y comprises at least one compound selected from the group consisting of Y2O3 and Yδ3, the compound containing Gd comprises at least one compound selected from the group consisting of Gd2O3 and Gdε3, the mixed material contains at least one compound selected from the group consisting of Y2O3 and Gd2O3, and α, β, γ, δ and ε independently represent at least one atom selected from the group consisting of F, Cl, Br and I.

The invention relates to the technical field of industrial-grade glycine production, in particular to a process and a device for purifying a byproduct ammonium chloride of industrial-grade glycine. The method comprises the following steps: decoloring methanol mother liquor from which glycine is separated through activated carbon or an aminated multi-walled carbon tube; continuously feeding the mixture and by-product red ammonium chloride into a pulping kettle, and fully stirring and mixing; continuously extracting the slurry, feeding the slurry into a horizontal scraper centrifuge to separate out wet ammonium chloride, and returning the separated filtrate to a rectification mother liquor ground pool; the filtrate normally enters a methanol recovery and red ammonium chloride recovery process flow, and an ammonium chloride wet product enters a disc dryer to be subjected to micro-negative-pressure drying, so that agricultural high-grade ammonium chloride can be produced. Firstly, the quality of the byproduct ammonium chloride of glycine can be improved from an agricultural qualified product to a superior product; 2, the quality of ammonium chloride is improved, and part of organic matters are intermittently recovered; and 3, the methanol mother liquor generated by the glycine is utilized, so that the normal operation of the glycine is not changed or influenced.

The invention relates to a method for green vanadium precipitation and sodium-ammonium circulation of a sodium modified vanadium solution, and belongs to the technical field of hydrometallurgy. The method comprises the following steps: adding hydrochloric acid and ammonium chloride into the sodium vanadium solution, adjusting the pH value, carrying out heating reaction, and carrying out solid-liquid separation to obtain ammonium polyvanadate and vanadium precipitation wastewater; adding a reducing agent into the vanadium precipitation wastewater for reduction reaction; adding a polycarboxylic acid water reducer, adjusting the pH value with ammonia water, and carrying out solid-liquid separation to obtain purified wastewater and vanadium-chromium filter residues; introducing carbon dioxide gas into the purified wastewater until the purified wastewater is saturated, cooling, crystallizing, and carrying out solid-liquid separation to obtain sodium bicarbonate solid and crystallization mother liquor; and evaporating and concentrating the crystallization mother liquor until the concentration of ammonium chloride is 65-75g / L, then cooling and crystallizing at the temperature of-10-20 DEG C, and carrying out solid-liquid separation to obtain ammonium chloride solid and residual wastewater. According to the invention, high-efficiency and high-purity recovery of sodium and ammonium ions and closed circulation of the system are realized, and the problems of sodium and ammonium circulation and impurity accumulation in the traditional process are solved.

The invention relates to the technical field of saline-alkali ore development, and discloses a method for processing alkali and ammonium chloride from saline-alkali ore in a short process. The method comprises the following steps: filtering saline-alkali brine extracted from saline-alkali ores, reacting with carbon dioxide to generate sodium bicarbonate, crystallizing and separating out the sodium bicarbonate to form baking soda slurry, carrying out solid-liquid preliminary separation on the baking soda slurry, washing a separated baking soda wet filter cake with water, and calcining; sodium carbonate generated by decomposition is cooled and sieved, and the sieved lower-layer product is a qualified sodium carbonate product; ammonium bicarbonate and sodium chloride are subjected to a double decomposition reaction, ammonium chloride and sodium bicarbonate crystals are generated, ammonium chloride mother liquor obtained after sodium bicarbonate is separated is pumped to a rotary precipitation machine, sodium chloride powder is added, ammonium chloride crystals are separated out, ammonium chloride slurry is formed, the separated ammonium chloride crystals are dried, screened and packaged, and qualified ammonium chloride products are produced. According to the method, all salt and alkali with economic value in the salt and alkali brine are processed and utilized, and benefit development of the high-salt-content trona ore is achieved.

The invention belongs to the technical field of chemical production, and particularly relates to a maltol chlorination neutralization reaction method and application. Comprising the following steps: putting 2m < 3 > of materials in a chlorination hydrolysis kettle into a neutralization kettle, stirring at 80r / min, and cooling to 60 DEG C; adding 1.6 m < 3 > of trichloromethane according to the ratio of the neutralization solution to the trichloromethane being 1: 0.8; introducing ammonia to adjust the pH value to 2.5-3.5, and standing for layering for 10 minutes; preheating the heavy phase to 120 DEG C, feeding the heavy phase into a sublimation kettle (vacuum is-0.065 to-0.096 MPa, and kettle temperature is less than 220 DEG C), sublimating, and freezing and centrifuging to obtain a maltol crude product; and freezing and centrifuging the light phase to obtain ammonium chloride salt. The method provided by the invention has the advantages of fast reaction, high yield, reduction of sewage amount and treatment cost, and improvement of device safety, and is suitable for ethyl maltol production.

The invention relates to the technical field of photovoltaics, in particular to a method for preparing ammonium bifluoride through combined treatment of fluorine and ammonia in the photovoltaic industry, which comprises a fluorine-containing waste liquid delivery pipe, an ammonia-containing waste gas absorption device, a membrane type solid-liquid concentration and separation device, a pH regulating tank, evaporation and concentration equipment, crystallization equipment and drying equipment, according to the method, the high-concentration fluorine-containing wastewater and ammonia-containing waste gas can be subjected to combined treatment, so that the fluorine-containing wastewater and ammonia-containing waste gas of a photovoltaic enterprise are subjected to resource recovery, and the environmental protection cost of the enterprise is reduced.

The system comprises an evaporative crystallization sodium chloride mother liquor tank, a reaction tank, a solid-liquid separator, an adjusting tank, an ammonium chloride crystallizer, a first centrifugal machine, a first micro-washer, a second centrifugal machine, a first dryer, an ammonium chloride storage tank and the like which are connected in sequence. According to the device, the evaporated and crystallized sodium chloride mother liquor is used as a raw material for preparing the baking soda, CO2 can be absorbed in the baking soda preparation process, carbon reduction and emission reduction are realized, sodium carbonate is prepared from the baking soda through calcination, sodium chloride which is poorer in sale is converted into sodium carbonate which is smoother in sale, and the additional value of byproducts is improved. And the byproduct sodium bicarbonate is reused in a hardness removal system of the high-salinity wastewater, so that the medicament cost for treating the high-salinity wastewater is reduced.

The invention relates to a resourceful treatment method for dried carnallite of ammonium chloride crystallization mother liquor, and belongs to the technical field of waste residue treatment in the field of ionic rare earth hydrometallurgy. An adsorption technology and a chemical precipitation method are adopted, pollutants are separated from the waste residues step by step, crystal form precipitates of calcium sulfate, calcium carbonate and ammonium magnesium phosphate are generated, solid-liquid separation is carried out, and then evaporated carnallite is converted into a high-purity ammonium chloride solution. The method is suitable for dry carnallite treatment of ammonium chloride crystallization mother liquor with various components in different proportions, impurity elements in carnallite are gradually separated by adopting a fractional precipitation method according to the fact that the solubility product constants of sulfide precipitation, calcium sulfate, calcium carbonate and magnesium ammonium phosphate are very small, technological parameters are strictly controlled, and the quality of the carnallite is improved. According to the method, the transformation from the dried carnallite of the ammonium chloride crystallization mother liquor to the ammonium chloride high-purity solution is realized, precipitation and adsorption materials in the steps are easy for solid-liquid separation, the process technology is simple, operation and control are easy, the consumption of chemical reagents is low, and the carnallite treatment cost is low.