107results about "Ammonium carbonates/bicarbonates" patented technology

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.

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 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.

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.

The invention relate to use of aqueous solution of organic ammonium carboxylate of formula (I): [NR1R2R3R4]+n[R5(COO)]-n, in which R1, R2, and R3 are selected from the group composing of hydrogen and methyl, R4 is a C1-C4-alkyl substituted with a hydroxyl group, R5 is hydrogen or methyl and n is 1, as a mist or drops in preventing dusting of fine material and in lowering the freezing point of said aqueous solution on the surface of said fine material or on the surface of dust particles obtained from said fine material by spraying said mist or drops onto fine material or onto dust particles obtained from said fine material to neutralize negatively charged dust particles or by changing negatively charged dust particles into positively charged dust particles, wherein said fine material is selected from the group composing of sand, crushed stone, stone powder, crushed expanded clay, or crushed expanded clay aggregate, crushed cement or concrete, cement or concrete powder, chopped organic material, minerals and metal powder.

The utility model relates to the technical field of ammonium bicarbonate processing, in particular to an energy-saving ammonium bicarbonate reaction tower which comprises a reaction tower and a stirring mechanism, the stirring mechanism comprises a stirring shaft body, a lifting twisting piece, a sleeve shaft, a swing rod and a balancing weight, the stirring shaft body is rotationally connected with the reaction tower and embedded in the reaction tower, the lifting twisting piece is fixedly connected with the stirring shaft body and sleeves the outer surface wall of the stirring shaft body, the sleeve shaft is fixedly connected with the stirring shaft body and sleeves the outer surface wall of the stirring shaft body, and the swing rod is arranged on the swing rod. The swing rod is fixedly connected with the sleeve shaft and located on the outer surface wall of the sleeve shaft, and the balancing weight is in threaded connection with the swing rod and located at one end of the swing rod. The reaction efficiency of ammonium bicarbonate can be effectively improved, accumulation of raw materials is avoided, meanwhile, the load of the output end of the motor can be reduced under the action of reducing driving resistance, centrifugal force and inertia, so that the purpose of saving energy is achieved, and the reaction efficiency can be effectively improved.

The invention discloses a carbon dioxide gas treatment device and method, and relates to the technical field of carbon dioxide treatment. The device comprises a purification assembly, an adsorption assembly is arranged at the top of the purification assembly, a transmission assembly is arranged on the purification assembly, and a crystallization assembly is arranged on the purification assembly. By controlling an abutting rod to abut against an arc-shaped abutting block, the arc-shaped rod drives a first piston plate to move in an arc-shaped pipe and extrudes oil liquid to be pumped into a cylindrical pipe, the oil liquid in the pipe pushes a second piston plate and drives a circular plate and a pricking needle to be away from the cylindrical pipe, and after the abutting rod crosses the arc-shaped abutting block, the pricking needle is reset under the elastic force effect of a second reset spring; a second piston plate pushes the oil back to an arc-shaped pipe, and meanwhile, a second spring enables an arc-shaped abutting block to reset, so that two groups of pricking needles reciprocate in a separation cover to prick bubble-shaped carbon dioxide, the bubble-shaped carbon dioxide is in full contact with the potassium carbonate solution, and meanwhile, two poking plates rotate to stir the potassium carbonate solution, so that the contact effect is further improved; therefore, the purification effect of carbon dioxide in the mixed gas is improved.

The application relates to a method for recycling secondary aluminum ash, which comprises the following steps: obtaining an aluminum-containing suspension and a first ammonia-containing gas by alkali leaching of the secondary aluminum ash; obtaining an aluminum-containing solid phase and a met-aluminate mother liquor by solid-liquid separation of the aluminum-containing suspension; obtaining an ammonium bicarbonate solution by first cooling and first carbonization of the first ammonia-containing gas; and mixing the met-aluminate mother liquor and the ammonium bicarbonate solution to prepare aluminum hydroxide. The method solves the pollution problem of the secondary aluminum ash, realizes efficient recovery of aluminum resources in the secondary aluminum ash, preferably has a recovery rate of active aluminum of more than 94.0%, and preferably has a total recovery rate of aluminum of more than 97.5%. The method realizes safe treatment and resource utilization of the secondary aluminum ash, and has the advantages of mild conditions, simple operation and easy industrial large-scale application.

The application provides a recycling method of lithium iron phosphate black powder. The recycling method comprises the following steps: mixing the lithium iron phosphate black powder and a nitric acid solution, performing self-thermal oxidation to obtain an acidolysis recovery gas and an acidolysis solution, the acidolysis recovery gas containing carbon dioxide and nitrogen oxides; performing one-stage impurity removal leaching and oxidative leaching on the acidolysis solution, and performing solid-liquid separation to obtain an oxidative leaching solution and a filter cake; calcining the filter cake to obtain a ferric phosphate product; performing two-stage impurity removal leaching on the oxidative leaching solution to obtain a two-stage impurity removal leaching solution; introducing the acidolysis recovery gas into the two-stage impurity removal leaching solution to perform three-stage impurity removal leaching, and performing solid-liquid separation to obtain a three-stage impurity removal leaching solution and a lithium carbonate product; and concentrating and crystallizing the three-stage impurity removal leaching solution to obtain a nitric acid product and a carbonic acid product. The lithium iron phosphate black powder is comprehensively utilized by using the nitric acid solution, the comprehensive recovery of carbon, lithium, phosphorus and nitrogen elements is realized, the lithium recovery rate is greater than 95%, and the phosphorus recovery rate is greater than 98%.

The invention relates to a blast furnace tail gas treatment method. The method comprises the following steps: carrying out desulfurization and dechlorination treatment on tail gas generated by a total-oxygen blast furnace; carrying out decarburization treatment on the tail gas subjected to desulfurization and dechlorination treatment to obtain carbon monoxide gas and carbon dioxide gas; carbon monoxide obtained after decarburization treatment is supplied to a total-oxygen blast furnace, and urea or ammonium bicarbonate products are prepared from carbon dioxide gas obtained after decarburization treatment. According to the method, processes such as total-oxygen blast furnace, hydrogen production through water electrolysis, nitrogen production through air separation and ammonia synthesis are effectively coupled, and byproducts of the processes are effectively utilized, so that the method has remarkable economic benefits, the treatment and purification cost of the blast furnace tail gas is reduced, and near-zero-carbon production of steel is realized.

Process for producing (NH4)2CO3 and Na2CO3 in an electrodialyzer cellstack by feeding a base chamber of the electrodialyzer cellstack with an aqueous solution comprising NH4Cl, NaCl, dissolved CO2 and obtaining an outlet solution from the base chamber comprising (NH4)2CO3 and Na2CO3, and wherein the pH of the outlet solution from the base chamber is at most 9.5.