161results about "Ammonium carbonates/bicarbonates" patented technology

The invention discloses a coal-fired power plant flue gas carbon capture and ammonium fertilizer co-production system and method based on an ammonia process, desulfurized flue gas sequentially passes through a saturation area, an absorption area and an ammonia washing area of a decarburization system, passes through a first-stage ammonia washing spraying layer and a second-stage ammonia washing spraying layer, and finally, purified flue gas is discharged to the atmosphere. After sodium hydroxide, sodium carbonate and a flocculating agent are added into desulfurization wastewater, obtained clear liquid is pumped into a first-stage ammonia washing spraying layer through a clear liquid conveying pump to spray and absorb escape ammonia gas, enters an absorption area slurry box after the pH value reaches the upper limit, and enters a saturation area after the pH value of the absorption area slurry box reaches the upper limit; slurry in the saturation area is subjected to solid-liquid separation through a cyclone and a centrifugal machine, and clear liquid returns to the saturation area again. And the slurry in the saturation area is separated twice by a cyclone and a centrifugal machine to obtain solid ammonium bicarbonate. According to the invention, part of desulfurization wastewater and carbon dioxide in desulfurized flue gas can be cooperatively treated, and the produced ammonium bicarbonate fertilizer can be used for producing ammonium fertilizer or compound fertilizer, and has high economic value.

The invention relates to an integrated system and method for co-producing ammonium bicarbonate and methanol through air energy storage. According to the integrated system, the air energy storage subsystem, the ammonia synthesis subsystem, the methanol synthesis subsystem and the ammonium bicarbonate synthesis subsystem are coupled and connected, and coupled co-production of ammonia gas, methanol and ammonium bicarbonate is realized in the process of energy storage and power generation by using the air energy storage subsystem; and large-scale energy storage and consumption of each subsystem and cyclic utilization of various by-products can be realized, and the realization of the dual-carbon target can be assisted in multiple directions. Wherein the ammonia synthesis subsystem and the methanol synthesis subsystem are respectively connected with the air energy storage subsystem through at least one group of synthesis heat recovery loops, so that reaction heat of each subsystem is recycled for heating compressed air, the temperature of an expansion acting inlet of the air energy storage subsystem is increased, and the power generation efficiency of the air energy storage system is improved.

The utility model discloses a device for decarburization and comprehensive utilization of flue gas by an ammonia process. The device comprises an absorption tower with a flue gas inlet pipe and a flue gas outlet, an absorption liquid tank, a spraying layer group for spraying absorption liquid into the absorption tower, a combined demister for demisting in the absorption tower, and a cooling device, the lower part of the absorption tower is filled with absorption liquid; the cooling device is used for cooling flue gas in the flue gas inlet pipe, and the flue gas inlet pipe is provided with a condensate water discharge pipe. The device has the advantages that the pH of the absorption liquid is controlled through the two-section or multi-section absorption tower, so that the ammonia escape is reduced, and the carbon dioxide absorption rate is improved; two process routes are arranged to solve the problems of imbalanced carbon and nitrogen in the absorption liquid and overhigh operation cost; high-temperature flue gas waste heat before desulfurization is used as a heat source in the analysis device to reduce energy consumption.

The utility model relates to the technical field of ammonium bicarbonate production, and discloses a production device for producing ammonium bicarbonate by recovering carbon dioxide from carbon-containing tail gas, which comprises a first box body, a filtering mechanism is arranged on the front surface of a second box body, and a stirring mechanism is arranged at the top of the first box body. By means of the filtering mechanism, high-concentration ammonia water obtained after deamination and concentration is poured into the second box body through a feeding pipe, impurity particles in the ammonia water are filtered through a filtering plate in the second box body, the impurity particles are prevented from being injected into the first box body along with the ammonia water, the filtering plate is pulled out of a sliding groove, the filtering plate is replaced, and the filtering effect is good. The replaced filter plate slides into a sliding groove, the left side of the filter plate can make contact with the right end of a fixing block, the fixing block can abut against the left side of the filter plate through the elastic force of a spring to fix the filter plate, and ammonia water in the first box body and various tail gases in carbon dioxide can fully react through a stirring mechanism and two rotating modes of a stirring rod; ammonium bicarbonate is generated.

The present disclosure provides a method for full-chain integrated low-carbon production of a positive electrode material. The method comprises the following steps: (1) preparing a ternary precursor by means of a coprecipitation method, collecting first waste gas, and carrying out pre-oxidation treatment on the precursor to obtain an oxidized precursor; (2) mixing the oxidized precursor and lithium carbonate for first-stage sintering, collecting second waste gas, and introducing oxygen-containing gas for second-stage sintering to obtain a ternary positive electrode material; and (3) mixing a phosphorus source, an iron source and a lithium source to obtain a lithium iron phosphate precursor, mixing the lithium iron phosphate precursor with a carbon source, introducing the second waste gas, carrying out calcination treatment to obtain a lithium iron phosphate positive electrode material, and absorbing the second waste gas with a solution of the first waste gas to obtain an ammonium carbonate solution. According to the present disclosure, by changing the oxidation mode of a ternary material, the two preparation processes of the ternary material and a lithium iron phosphate material can cooperate with each other, and separation and recycling of two atmospheres are achieved by controlling conditions so as to achieve the objective of energy saving and carbon reduction.

The invention discloses a production method of a solution containing ammonium carbonate, which comprises the following steps: 1) firing rare earth carbonate by using natural gas to obtain rare earth oxide and first tail gas; 2) performing heat exchange on the first tail gas through a tail gas cooler and recovering heat; introducing the cooled first tail gas into a quench tower, and circularly spraying with ammonia water to obtain second tail gas; and 3) absorbing the second tail gas with ammonia water in a stator-rotor reactor to obtain a solution containing ammonium carbonate, introducing the formed third tail gas into a tail gas absorption tower, removing residual ammonia with acid, and discharging the obtained fourth tail gas meeting the emission standard. According to the method, carbon recycling can be achieved through low-concentration ammonia water, and the ammonia utilization rate reaches 95% or above.

An apparatus and method for producing ammonium bicarbonate in an ammonia-based decarbonation system is provided. The apparatus includes a cooling functional zone operable to cool a process gas, an ammonium bicarbonate production zone operable to produce ammonium bicarbonate, a carbon dioxide absorption zone operable to absorb carbon dioxide from the process gas via multi-stage absorption, and an ammonia removal functional zone operable to remove ammonia from the decarbonated process gas, in which absorbent ammonia for carbon dioxide removal is mainly added to the carbon dioxide absorption zone. Through the zone control of ammonium bicarbonate production, CO2 absorption and ammonia removal, the efficiency of decarbonation absorption can be improved and ammonia leakage can be reduced. Meanwhile, the carbon dioxide in the flue gas can be utilized for the production of ammonium bicarbonate as a nitrogen fertilizer.

The present invention addresses to a method of removing scale from the DHSV of the oil production string aiming at maintaining the production of the wells and thus avoiding the loss of production. First, a neutralizing solution is placed in the service line, before pumping the scale removing solution through the string to act on the DHSV. Next, the acid is pumped into the production string to react with the calcium carbonate scale. After the time for the dissolution of the scale inside the DHSV, the well is opened for production by the service line. The spent acid is mixed with the neutralizing solution inside the service line, reducing its corrosiveness in relation to the service line, contributing to its preservation.

The invention belongs to the technical field of ammonium bicarbonate production, and particularly relates to an ammonium bicarbonate production device capable of recovering high-concentration carbon dioxide, which comprises a reaction tank, a liquid inlet pipe arranged on the upper side of the reaction tank, a discharge pipe arranged at the bottom of the reaction tank, and a disturbance mechanism arranged on the reaction tank, a rotating shaft is fixed to an output shaft of the motor, multiple first disturbance blades are arranged on the side wall of the rotating shaft, a spraying pipe is fixed to the bottom of the rotating shaft, and multiple one-way sprayers are arranged at the upper end of the spraying pipe; a shell sleeving the outer side of the rotating shaft is fixed to the mounting frame and connected with an air inlet pipe, and an air inlet communicated with the interior of the shell is formed in the upper end of the air channel; through the synergistic effect of the first disturbance blade of the disturbance mechanism and the second disturbance blade of the auxiliary disturbance assembly, the mixing effect of carbon dioxide and ammonia water is enhanced, the absorption stroke of carbon dioxide is prolonged, the reaction is more sufficient, and thus the reaction efficiency is improved.

The invention relates to the technical field of water treatment, in particular to a method for reducing solid waste by treating phosphatized sewage through ternary composite alkali, which comprises the following steps: collecting phosphatized sewage data in real time through an online water quality sensor, inputting a support vector regression model optimized by an improved particle swarm optimization algorithm, calculating the dosage of the ternary composite alkali, and calculating the dosage of the ternary composite alkali. The pH value is adjusted in a segmented adding mode, so that heavy metal ions and phosphate are precipitated in sequence; adding a magnetic micro-nano seed crystal and cationic polyacrylamide in a neutralization reaction to promote the growth of precipitated particles, separating a mixed solution by using a superconducting high-gradient magnetic separator, and carrying out electroosmotic dehydration on the magnetic sludge; finally, mixing the dewatered sludge with sulfuric acid for acid leaching, filtering, adding ammonium bicarbonate to crystallize and separate out calcium hydrophosphate, removing heavy metal ions from mother liquor, and recovering calcium sulfate; the invention aims to solve the problems that the dosage of a medicament is difficult to accurately control and the treatment cost is high and resources are wasted due to water quality fluctuation when phosphating sewage is treated by using the traditional ternary composite alkali.

The invention discloses a metal ion removal method based on ammonium bicarbonate. The method comprises the following steps: S1, pretreating raw material gas and stronger ammonia water after desulfurization of synthetic ammonia; s2, mixing the raw material gas pretreated in the step S1, stronger ammonia water and CO2 to obtain an ammonium bicarbonate suspension, and filtering; s3, adjusting the pH value, adding a masking agent and a precipitating agent into the solution under a stirring condition, mixing, and filtering to obtain an ammonium bicarbonate solution; and S4, adjusting the pH value of the ammonium bicarbonate solution in S3, decolorizing, and dehydrating to obtain an ammonium bicarbonate product. According to the method for removing the metal ions in the ammonium bicarbonate production process, through appropriate reaction conditions such as appropriate temperature, time and pressure control, and selection of an efficient adsorption material and combination of a masking agent and a precipitating agent, the metal ion removal effect can be ensured, and meanwhile the economical efficiency and feasibility of the whole technological process are also ensured.

The invention discloses melamine tail gas treatment equipment, and belongs to the technical field of melamine tail gas treatment, the melamine tail gas treatment equipment comprises a base plate, the top end of the base plate is fixedly connected with an absorption tower and a carbonization tower, the outer side of the absorption tower is fixedly connected with a transmission pump A, the output end of the transmission pump A is fixedly connected with an outer guide pipe A, and the end, away from the transmission pump A, of the outer guide pipe A is communicated with the absorption tower; the output end of the transmission pump A is fixedly connected with a transmission pipe A, and the end, away from the transmission pump A, of the transmission pipe A communicates with the liquid inlet end of the carbonization tower; and the cooling assembly is assembled at the top end of the substrate. The melamine tail gas treatment equipment provided by the invention can solve the problem of environment-friendly treatment of the melamine tail gas, realizes cyclic utilization of resources, effectively controls the treatment cost of the melamine tail gas, realizes resource recovery while solving the problem of environment-friendly treatment of the melamine tail gas, and has the advantages of environmental protection and environmental protection. And the treatment cost of the melamine tail gas is relatively high.

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.

A method of treating a subterranean formation by contacting the formation with the following (a) ammonium bicarbonate; (b) an oxidizing agent selected from a perchlorate or a nitrite or combinations thereof; and (c) an acid (AA).

The application discloses a method for improving the purity of sodium bicarbonate and the filtering efficiency during the resource utilization of sodium chloride, and comprises the following steps: (1) carbonization; (2) separation and washing of sodium bicarbonate solid, and obtaining carbonization mother liquor; (3) deacidification: adding ammonium bicarbonate into the carbonization mother liquor during the deacidification, and making the added ammonium bicarbonate all be converted into ammonium carbonate, obtaining deacidification mother liquor, and returning the gas generated during the deacidification to the carbonization reaction solution in the step (1); (4) crystallization; (5) separation of ammonium chloride, and returning the obtained crystallization mother liquor to the carbonization reaction solution in the step (1).

Apparatus and method for producing ammonium bicarbonate in an ammonia-based decarbonization system are provided. The apparatus comprises a cooling function zone operable to cool a process gas; an ammonium bicarbonate generation zone operable to generate ammonium bicarbonate; a carbon dioxide absorption zone operable to absorb, via multi-stage absorption, carbon dioxide from the process gas; and an ammonia removal function zone operable to remove ammonia from a decarbonized process gas, wherein absorbent ammonia for carbon dioxide removal is mainly added into the carbon dioxide absorption zone. Through zone control of ammonium bicarbonate generation, CO2 absorption and ammonia removal, the efficiency of decarbonization absorption may be improved, and ammonia escape may be reduced. Meanwhile, carbon dioxide in flue gas can be utilized for producing ammonium bicarbonate as a nitrogen fertilizer.

The invention discloses a method for preparing calcium chloride by decomposing calcium carbonate with ammonium chloride, and belongs to the technical field of chemical metallurgy. The method comprises the following steps: taking a solution containing calcium chloride as a reaction base solution for decomposing calcium carbonate by ammonium chloride, adding ammonium chloride and calcium carbonate into the base solution, stirring and heating to quickly react in the solution with the temperature of 105-175 DEG C, and regularly or continuously discharging slurry generated by the reaction to maintain the balance of calcium chloride in a reaction system; and carrying out liquid-solid separation on the discharged slurry to obtain a calcium chloride solution, and collecting the gas generated by the reaction for comprehensive utilization. The method has the advantages of high solution reaction temperature, high calcium carbonate decomposition speed, thorough decomposition, easy recycling of gas generated by decomposition, simple process, convenient operation, low production cost and the like, and is suitable for large-scale industrial production of ammonium chloride wet decomposition of calcium carbonate.

The utility model relates to the technical field of ammonium bicarbonate production, and provides carbonization equipment for ammonium bicarbonate production, which comprises a carbonization tower main body, a plurality of inner rods and a lifting seat, the inner rods are arranged in the carbonization tower main body, the lifting seat is slidably sleeved and connected on the inner rods, and a cleaning assembly is arranged on the carbonization tower main body and the lifting seat. The collecting assembly is arranged in the carbonization tower body, the cleaning assembly comprises a first motor, the first motor is arranged at the top of the carbonization tower body, the top of the carbonization tower body is rotationally connected with a transverse shaft, the transverse shaft and the output end of the first motor are provided with first gears, and the top of the carbonization tower body is rotationally connected with a pair of reels. By means of the technical scheme, the problems that in the prior art, only the middle section of the carbonization tower can be cleaned, comprehensive cleaning cannot be achieved, the internal occupied space is too large, cleaned crystals are inconvenient to collect and can only be discharged at the discharging position, other equipment needs to be connected to the bottom of the tower body for collection, and the operation is troublesome are solved.

A method of forming an ammonia product and / or ammonium product includes - Feeding a feed stream containing ammonia to a stripper (2) at temperatures below the boiling point of water, - Introducing a stripper gas into the stripper at a stripper gas inlet (16), contacting the feed stream with the stripper gas, and removing the stripper gas at a stripper outlet (17), - Forming a condensate from the stripper gas in a condenser (20), - Feeding the condensate to a process unit (25), - Forming an ammonia and / or ammonium product in the process unit (25), and - Feeding an outlet (34,48) of the process unit (25) to the stripper gas inlet (16) of the stripper (2). Also a system (1) for removing ammonia from an ammonia containing effluent is described.

The present invention provides an offshore floating fertilizer production platform, which includes a gas purification module (114), an ammonia production module (115), and a fertilizer production module (116) that are sequentially connected on the floating fertilizer production platform (101); an air separation module (111) is connected to the gas purification module (114) to provide a nitrogen source; a seawater desalination module (109) is sequentially connected to an electrolytic hydrogen production module (110) and the gas purification module (114) to provide a hydrogen source; a carbon dioxide capture module (112) is sequentially connected to a carbon dioxide gas storage tank (113) and the fertilizer production module (116) to provide a carbon source. The present invention itself does not emit carbon, and can also capture carbon dioxide as a fertilizer raw material, achieving negative carbon emissions, no pollution, no carbon emissions, sufficient energy, solving the problems of high energy consumption and high pollution in fertilizer production, being not only green and environmentally friendly, but also having a low long-term operation cost.

Provided herein are systems and methods for producing nitrophosphates and mineralized carbon. Advantageously, the systems and methods are capable of sequestering carbon from the atmosphere. The systems generally include a first reactor for producing nitric acid; a mixer for mixing the nitric acid produced in the first reactor with a phosphate source, thereby producing nitro-phosphoric acid; and a second reactor for producing a solution comprising nitrophosphates and mineralized carbon, wherein the second reactor is operable to receive: the nitro-phosphoric acid from the mixer, ammonia, water, and carbon dioxide.

The invention relates to a method and a device for reducing volatilization of granular chemical fertilizer and improving strength, which are suitable for granular ammonium bicarbonate or ammonium bicarbonate-based compound fertilizer, the granular chemical fertilizer is treated in a vacuum packaging mode, and packaging tail gas is collected and purified. The problems of thermal decomposition volatilization, hardening, pulverization and the like of the granular fertilizer in the long-term storage process in a packaging bag are relieved, meanwhile, the strength of the granular fertilizer is improved, the fragile and pulverization characteristics of the granular fertilizer are reduced, and the long-term storage quality of the granular fertilizer product is improved.

The invention is applied to desulfurization and decarburization of process gas containing sulfur oxides and CO2, belongs to the field of environmental protection, and adopts ammonia as a desulfurization and decarburization agent, the gas firstly enters a desulfurization device for desulfurization to generate an ammonium sulfate fertilizer, the desulfurized gas enters a decarburization device, carbon dioxide in the gas is removed, and an ammonium bicarbonate fertilizer is generated; the decarbonized gas contains free ammonia, is washed with a desulfurization circulating solution and then is washed with water, and the washing solution returns to a desulfurization area to be used as an absorbent for desulfurization. The technology organically integrates decarburization and desulfurization technologies, adopts desulfurization circulating liquid to wash ammonia, is high in ammonia washing efficiency, successfully solves the problem of ammonia escape in the decarburization process, is simpler in process, is low in investment and operation cost, produces ammonium sulfate and ammonium bicarbonate fertilizers as byproducts, does not need to re-inject CO2 underground for storage, can use the byproduct ammonia water, and is environment-friendly. And the purposes of treating waste with waste and recycling economy are really achieved.

The present disclosure relates to a method of carbon dioxide mineralisation, the method comprising: treating a material, such as a mineral, with carbon dioxide and a base, wherein the treatment occurs in solution phase, the material comprising: a first cation that is Ca or Mg; a second cation which is not Ca and or Mg; and one or more anions which are not carbonate; such that a product solution comprising an acid or a salt of the base and one of the one or more anions and a salt of the second cation and one of the one or more anions is formed, and a carbonate salt of the first cation is caused to precipitate.

The present application discloses a denitrogenation method and various applications thereof. The denitrogenation method comprises: reacting a nitrogen-containing heteroaromatic compound, a hydrogen donor, a catalyst and a solvent in an oxygen-free environment to generate a nitrogen-containing inorganic compound and an organic compound without nitrogen-containing heteroatoms, wherein the hydrogen donor is not hydrogen.

The application discloses a recycling method of condensate of ammonia shift stripping tower, comprising the following steps: S1 condensate cooling: hot condensate with a temperature of 80-100 DEG C is led out from the lower part of the ammonia shift stripping tower; S2 split delivery: the cooled condensate is divided into two routes by a condensate pump: the first route is sent to a synthetic gas washing tower to replace fresh desalted water for cooling and demisting of the synthetic gas, and fresh water consumption is reduced; the second route is sent to a carbonization mother liquor tank; S3 ammonia absorption concentration: the ammonia absorption pump is used to deliver the ammonia absorption mother liquor in the carbonization mother liquor tank to a high ammonia absorber; S4 concentrated ammonia water cooling: the concentrated ammonia water after concentration is sent into an air-cooled heat exchanger; S5 carbonization reaction product: ammonia in the concentrated ammonia water reacts with carbon dioxide to generate ammonium bicarbonate crystals, and ammonium bicarbonate products are obtained after separation and drying. The whole recycling process can be directly connected with the existing ammonia production system, the existing equipment does not need large-scale modification, the investment cost is low, and the industrialization popularization is easy.

The invention discloses a key effect of a carbon capture byproduct ammonium bicarbonate chemical fertilizer on promotion of green development of agriculture and a method of the carbon capture byproduct ammonium bicarbonate chemical fertilizer. The method comprises the following steps: firstly, capturing carbon dioxide by ammonia to produce an ammonium bicarbonate chemical fertilizer, and then producing a low-nitrogen compound fertilizer by using ammonium bicarbonate, ammonium sulfate produced by an ammonia desulfurization technology, a phosphate fertilizer, a potash fertilizer and an auxiliary agent to exert a compound effect; deep application, drip irrigation, slow release, nitrogen reduction, phosphorus reduction and potassium reduction are combined, the effects of reducing pollution, reducing carbon, increasing efficiency and increasing yield are achieved, and green development of agriculture is promoted.

A high pressure melamine production process wherein treating crude melamine comprises separating solid melamine from a mother liquor (1) comprising water, ammonia, carbon dioxide, residual melamine and OAT; the treatment of the mother liquor comprises deamination (100) and treatment of an ammonia depletion solution (4) in an OAT decomposition section (200); a purification treatment (300) of the OAT-depleted stream (6) produces a vapor stream (7) containing ammonia, CO2 and water and a first liquid stream (8) and a second liquid stream (9); said first liquid stream (8) comprising residual ammonia and having a CO2 concentration not greater than a target concentration; the second liquid stream (9) has an ammonia concentration not greater than a target concentration; at least part of the first liquid stream and / or at least part of the second liquid stream is recycled to the melamine production process.

The invention discloses an improved high-grade pyrogenic process recovery method for regenerated lithium in battery black powder, and belongs to the technical field of battery black powder. The core of the method is that plasma high-temperature volatilization and carbon thermal reduction in-situ synthesis are coupled: firstly, battery black powder and graphite are mixed, lithium is selectively volatilized in a plasma furnace at 1400-1600 DEG C, and the lithium is enriched in smoke dust; then, lithium-rich smoke dust obtained through trapping is mixed with graphite and silicon dioxide, high-temperature smoke gas at the temperature of 700-800 DEG C discharged by a plasma furnace is directly used as a fluidizing medium and a heat source, a reaction is carried out in a fluidized bed at the temperature of 700-850 DEG C, and a high-grade lithium silicate product is synthesized in one step. According to the invention, cascade and closed-loop utilization of system energy is realized, additional fuel is not needed, an unstable intermediate product is directly converted into stable lithium silicate with high additional value, a complex wet purification step is omitted, and the method has the outstanding advantages of high lithium recovery rate, low energy consumption, high product value and green and efficient process.

The present disclosure provides methods and systems for capturing carbon dioxide. An example system includes: a pyrolysis device configured to produce syngas and bio-oil from biomass; a power generator configured to produce electricity by combusting at least one of the syngas or the bio-oil; and a carbon capture system configured to use the electricity to capture carbon dioxide from a gas.