CN113830795A - Using sodium sulfate and CO2Equipment and method for producing sodium carbonate and ammonium sulfate - Google Patents
Using sodium sulfate and CO2Equipment and method for producing sodium carbonate and ammonium sulfate Download PDFInfo
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- CN113830795A CN113830795A CN202111278147.3A CN202111278147A CN113830795A CN 113830795 A CN113830795 A CN 113830795A CN 202111278147 A CN202111278147 A CN 202111278147A CN 113830795 A CN113830795 A CN 113830795A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/12—Preparation of carbonates from bicarbonates or bicarbonate-containing product
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/26—Carbonates or bicarbonates of ammonium
Abstract
The invention discloses a method for utilizing sodium sulfate and CO2An apparatus and a method for producing sodium carbonate and ammonium sulfate, which belong to the technical field of chemical industry. Comprises a sodium sulfate ammoniation liquid system, a sodium bicarbonate system, a soda ash system and an ammonium sulfate system; the sodium sulfate ammoniation liquid system comprises a waste ammonia water storage tank, a first ammonia still, an ammonia absorption tower, a mother liquid storage tank and a sodium sulfate dissolving tank which are connected in sequence; the sodium bicarbonate system comprises a compressor, a filter, a buffer tank, a carbonization tower, a tail gas absorption tower, a pre-carbonization tower and a water washing tower which are connected in sequence; the soda system comprises a sodium bicarbonate thickener, a centrifuge, a calciner and CO which are connected in sequence2A compressor; the ammonium sulfate system comprises a second ammonia still, a first reaction kettle, a second reaction kettle and an ammonium sulfate reaction kettle which are connected in sequence, wherein the second ammonia still passes throughThe reboiler forms the cycle. The invention reduces the environmental pollution, realizes the resource regeneration, can co-produce ammonium bicarbonate, soda ash and ammonium sulfate, has low cost and energy consumption and good economic benefit.
Description
Technical Field
The invention belongs to the technical field of chemical industry, relates to soda production, and particularly relates to a method for utilizing industrial solid waste sodium sulfate and CO in industrial waste gas2An apparatus and process for producing sodium carbonate and ammonium sulfate.
Background
At present, the domestic soda production process mainly comprises an ammonia-soda process, a combined soda process and trona processing. The following defects exist in the three methods respectively: (1) the natural alkali processing mainly depends on natural alkali minerals as raw materials to prepare soda ash, and although the natural alkali method has less environmental pollution and relatively low cost, the natural alkali method has geographical limitation; (2) the ammonia-soda process has great environmental pollution, consumes a large amount of natural resources, has low utilization rate of raw salt and small utilization rate of the produced by-product calcium chloride, and most of the by-product calcium chloride is treated as waste residues; (3) the combined alkali method has less pollution and higher utilization rate of raw salt than the ammonia alkali method, but needs to be matched with the synthetic ammonia industry, and the application range of the byproduct ammonium chloride as a fertilizer is limited.
The existing ammonium bicarbonate production process mainly utilizes anthracite coal gasified by a gas producer to prepare semi-water gas, the gas is desulfurized and decarbonized to synthesize ammonia, and the synthesized ammonia absorbs carbon dioxide in the gas in a carbonization section to generate ammonium bicarbonate.
The emission of a large amount of carbon dioxide in flue gas of industrial furnaces such as coking, metallurgy, power plants, lime kilns and the like is one of the great causes of global warming. In order to realize the national 'double-carbon' strategy of carbon neutralization, the national 'carbon peak reaching' and 'carbon neutralization' strategy deployment is implemented, and CO is realized in a carbon capture mode2The comprehensive utilization of the sodium carbonate is to convert the sodium carbonate into a chemical basic product, namely the sodium carbonate, and is a hot spot of the current research in the chemical field.
In order to solve the defects in the prior art, the invention develops a method for utilizing industrial solid waste sodium sulfate/anhydrous sodium sulphate; high-concentration CO in coking, metallurgy, power plant, lime kiln and other industrial furnaces2(ii) a Producing sodium carbonate and ammonium sulfate by using ammonia water as a by-product in chemical industry as a raw materialThe process of (1).
Disclosure of Invention
The invention aims to provide a method for utilizing industrial solid waste sodium sulfate and CO in industrial waste gas2Apparatus and process for producing sodium carbonate and ammonium sulfate to achieve CO reduction2Discharge, reduce production cost and solve the problem of environmental pollution caused by solid waste discharge.
The invention is realized by the following technical scheme:
by using sodium sulfate and CO2The equipment for producing sodium carbonate and ammonium sulfate comprises a sodium sulfate ammoniation liquid system, a sodium bicarbonate system, a soda ash system and an ammonium sulfate system;
the sodium sulfate ammoniation solution system comprises a waste ammonia water storage tank, a first ammonia still, an ammonia absorption tower, a mother solution storage tank and a sodium sulfate dissolving tank which are connected in sequence, wherein the ammonia absorption tower is connected with the sodium sulfate ammoniation solution storage tank through a heat exchanger;
the sodium bicarbonate system comprises first CO connected in sequence2The system comprises a compressor, a filter, a buffer tank, a carbonization tower, a tail gas absorption tower, a pre-carbonization tower and a water washing tower;
the soda system comprises a sodium bicarbonate thickener, a centrifugal machine, a calcining furnace and second CO which are connected in sequence2The centrifuge is also connected with a sodium bicarbonate mother liquor storage tank;
the ammonium sulfate system comprises a second ammonia still, a first reaction kettle, a second reaction kettle and an ammonium sulfate reaction kettle which are connected in sequence, wherein the second ammonia still forms circulation through a reboiler;
the carbonization tower is respectively connected with CO of the soda ash system2The compressor is connected with the sodium bicarbonate thickener, the second ammonia still is respectively connected with the sodium bicarbonate mother liquor storage tank and the ammonia absorption tower, and the pre-carbonization tower is connected with the ammonia absorption tower.
Further, the top of the ammonia absorption tower is filled with third CO2The compressor is connected with the pre-ammonia tower.
The bottom of the first reaction kettle of the ammonium sulfate system is sequentially connected with a first centrifuge and a first mother liquor tank, the first mother liquor tank is connected with a second reaction kettle, the bottom of the second reaction kettle is sequentially connected with a second centrifuge and a second mother liquor tank, and the second mother liquor tank is connected with the ammonium sulfate reaction kettle.
Furthermore, the invention also discloses a method for producing sodium carbonate and ammonium sulfate by using the equipment, which specifically comprises the following steps:
(1) CO in the mixed gas generated by the second ammonia still2Firstly, the mixture enters a pre-carbonization tower to pre-carbonize sodium sulfate ammoniated liquid, and the residual CO which is not absorbed2The gas enters a tail gas absorption tower to be CO2High concentration CO produced by gas and calciner2The gas enters a carbonization tower to react to generate sodium bicarbonate, and the unabsorbed gas enters a tail gas absorption tower to absorb CO2The flue gas is discharged from the tail gas absorption tower, and the gas enters a water washing tower for cleaning and emptying;
(2) feeding chemical residual ammonia water into a first ammonia still for concentration, cooling the ammonia gas by a cooler, introducing the ammonia gas into the lower part of an ammonia absorption tower, reversely contacting with sodium sulfate saturated liquid to generate sodium sulfate ammoniated liquid, cooling the ammoniated liquid by a heat exchanger to form the sodium sulfate ammoniated liquid, and feeding the sodium sulfate ammoniated liquid into a pre-carbonization tower for pre-carbonization;
(3) sending the sodium bicarbonate slurry into a sodium bicarbonate thickener, growing crystals, precipitating the crystals, centrifugally separating to obtain sodium bicarbonate solid, calcining in a calcining furnace to obtain soda ash, and sending gas generated by calcination into a carbonization tower to generate sodium bicarbonate;
(4) sodium bicarbonate mother liquor enters the second ammonia still from the upper part of the tower, is heated by a reboiler and returns to the tower, and NH is obtained by evaporation3And mixed gas of CO2, and clear liquid obtained after ammonia evaporation passes through a reaction kettle, and ammonium sulfate is obtained after refining and centrifugation.
5. The method for producing sodium carbonate and ammonium sulfate according to claim 4, wherein the first ammonia still concentrates the ammonia water to more than 85% by mass.
And (4) in the step (3), when the solid content of the sodium bicarbonate thickener reaches 50%, starting a sodium bicarbonate centrifugal machine, and performing centrifugal separation to obtain a sodium bicarbonate solid.
The step (2) is that the saturated sodium sulfate solution is derived from industrial solid waste sodium sulfate or industrial anhydrous sodium sulfate and secondary salt generated by an ammonium sulfate separation system.
The agricultural nitrogen content of the ammonium sulfate in the step (4) is more than 20 percent.
The annual production of the soda ash is more than 10 ten thousand tons.
Compared with the prior art, the invention has the following advantages:
(1) the industrial solid waste sodium sulfate or anhydrous sodium sulfate, carbon dioxide and chemical residual ammonia water are changed into valuable, the environmental pollution is reduced, and the resource regeneration is realized;
(2) can simultaneously produce agricultural ammonium bicarbonate, industrial soda ash and agricultural ammonium sulfate, and has low cost and energy consumption and good economic benefit.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1-a first compressor; 2-a filter; 3-CO2A buffer tank; 4-a pre-carbonization tower; 5-a tail gas absorption tower; 6-tail gas absorption tower circulating pump; 7-a carbonizer; 8-sodium bicarbonate slurry delivery pump; 9-a water washing tower; 10-sodium sulfate powder bin; 11-sodium sulfate dissolving tank; 12-ammonium sulfate dissolving tank delivery pump; 13-a sodium sulfate saturated mother liquor storage tank; 14-ammonium sulfate mother liquor delivery pump; 15-ammonia absorption tower; 16-a heat exchanger; 17-ammonia still ammoniated liquid delivery pump; a 18-sodium sulfate ammoniated liquid storage tank; 19-ammoniated liquid delivery pump; 20-a cooler; 21-ammonia still waste ammonia storage tank; 22-waste ammonia water delivery pump; 23-waste ammonia storage tank; 24-sodium bicarbonate thickener; 25-sodium bicarbonate centrifuge; 26-sodium bicarbonate mother liquor storage tank; 27-a calciner; 28-second CO2A compressor; 29-sodium bicarbonate mother liquor delivery pump; 30-a second ammonia still; 31-a reboiler; 32-circulating liquid delivery pump; 33-clear liquid transfer pump; 34-a first reaction kettle; 35-a first centrifuge; 36-a first mother liquor storage tank; 37-a first mother liquor delivery pump; 38-a second reaction kettle; 39-a second centrifuge; 40-a second mother liquor storage tank; 41-a second mother liquor delivery pump; 42-ammonium sulfate reaction kettle; 43-ammonium sulfate centrifuge; 44-ammonium sulfate mother liquor storage tank; 45-ammonium sulfate delivery pump; 46-third CO2A compressor.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in figure 1, a method for utilizing sodium sulfate and CO2The equipment for producing sodium carbonate and ammonium sulfate is characterized by comprising a sodium sulfate ammoniation liquid system, a sodium bicarbonate system, a soda ash system and an ammonium sulfate system; sodium sulfate ammoniation liquid system include waste ammonia storage tank 23, waste ammonia water transfer pump 22, first ammonia still tower 21, cooler 20 and the ammonia absorption tower 15 that connect gradually, still including connecting gradually sodium sulfate powder storehouse 10, sodium sulfate dissolving tank 11, ammonium sulfate dissolving tank transfer pump 12 and the saturated mother liquor storage tank 13 of sodium sulfate, the saturated mother liquor storage tank 13 of sodium sulfate pass through ammonium sulfate mother liquor transfer pump 14 and be connected with ammonia absorption tower 15, ammonia absorption tower 15 pass through third CO2The compressor 46 is connected with the pre-ammonia tower 4, and also comprises a sodium sulfate ammoniated liquid storage tank 18, an ammonia still ammoniated liquid delivery pump 17 and a heat exchanger 16 which are connected in sequence, wherein the bottom of the ammonia absorption tower 15 is connected with the heat exchanger 16; the sodium bicarbonate system comprises first CO connected in sequence2The system comprises a compressor 1, a filter 2, a buffer tank 3, a carbonization tower 7, a tail gas absorption tower 5, a pre-carbonization tower 4, a water washing tower 9, a tail gas absorption tower circulating pump 6 and a sodium bicarbonate slurry conveying pump 8; the soda ash system comprises a sodium bicarbonate thickener 24, a centrifuge 25, a calciner 27 and a second CO which are connected in sequence2The compressor 28, the centrifuge 25 is also connected with a sodium bicarbonate mother liquor storage tank 26; the ammonium sulfate system include the second ammonia still 30 that connects gradually, clear liquid delivery pump 33, first reation kettle 34, first centrifuge 35, first mother liquor storage tank 36, first mother liquor delivery pump 37, first reation kettle 38, second centrifuge 39, second mother liquor storage tank 40, second mother liquor delivery pump 41, ammonium sulfate reation kettle 42, ammonium sulfate centrifuge 43, ammonium sulfate mother liquor storage tank 44, the bottom of ammonium sulfate mother liquor storage tank 44 sets up ammonium sulfate delivery pump 45 and forms the circulation, wherein the bottom of second ammonia still 30 is connected with reboiler 31 through the circulating liquid delivery pump and is circulated.
During operation, flue gas of coking, metallurgy, power plants, cement plants, limekilns and other industrial furnaces contains a large amount of CO2The flue gas of the industrial furnace is treated by first CO2After being compressed by a compressor 1, the mixture is dehydrated and purified by a filter 2 and stored in a storage container CO2Buffer tank 3, compressed CO2CO in the mixed gas generated by the second ammonia still 30 of the gas and ammonium sulfate separation system2Firstly, the mixture enters a pre-carbonization tower 4 to be pre-carbonized by sodium sulfate ammoniation liquid, and the residual CO which is not absorbed2The gas enters a tail gas absorption tower 5; partial lime kiln CO2High concentration CO produced by the gas and soda ash generation system calciner 272The gas enters a carbonization tower 7 to react with the pre-carbonization liquid to generate sodium bicarbonate, and the gas which is not absorbed enters a tail gas absorption tower 5 to absorb CO2The flue gas is discharged from the tail gas absorption tower 5, and the gas enters a water washing tower 9 for cleaning and emptying.
A first secondary salt generated by an industrial solid waste sodium sulfate, industrial grade anhydrous sodium sulphate and ammonium sulfate separation system is stored in a sodium sulfate powder bin 10, a certain amount of sodium sulfate is added into a sodium sulfate dissolving tank 11, meanwhile, a certain amount of water is added to prepare a sodium sulfate saturated solution, and the sodium sulfate saturated solution is sent into a sodium sulfate mother liquor storage tank 13 through a dissolving tank delivery pump 12.
The ammonia concentration of the chemical residual ammonia water is 4%, the chemical residual ammonia water is stored in a waste ammonia water storage tank 23, the chemical residual ammonia water is sent into an ammonia still 21 through a waste ammonia water delivery pump 22, the ammonia water concentration is concentrated to 85% of gaseous ammonia in the ammonia still 21, the ammonia gas is cooled by a cooler 20, then the ammonia gas is introduced into the lower part of an ammonia absorption tower 15 and is reversely contacted with sodium sulfate saturated liquid which is sent to the upper part of the ammonia absorption tower 15 by a sodium sulfate mother liquor delivery pump 14, and sodium sulfate ammoniation liquid is generated. Cooling the ammoniated liquid by a heat exchanger 16, and sending the ammoniated liquid to a sodium sulfate ammoniated liquid storage tank 18 by an ammoniated liquid conveying pump 17 of an ammonia still; sodium sulfate ammoniation liquid is sent into a pre-carbonization tower 4 through an ammoniation liquid delivery pump 19 for pre-carbonization, the solution of a tail gas absorption tower 7 is poured into the carbonization tower 9 through a tail gas absorption tower circulating pump 6 according to the liquid level of the carbonization tower 9, and then the solution of the pre-carbonization tower 4 is poured into the tail gas absorption tower 7 for CO treatment2Absorbing, and replenishing ammonium sulfate ammoniation liquid to the pre-carbonization tower 4 again.
When the sodium bicarbonate in the carbonization tower 9 reaches a certain degree, the sodium bicarbonate slurry is sent to a sodium bicarbonate thickener 24 through a sodium bicarbonate delivery pump 8, the sodium bicarbonate grows up in the thickener 24, and crystals precipitate. The mother liquor overflowed from the sodium bicarbonate thickener 24 enters a sodium bicarbonate mother liquor storage tank 26 when the sodium bicarbonate thickener 24 containsAnd when the solid content reaches 50%, starting a sodium bicarbonate centrifuge 25, performing centrifugal separation to obtain sodium bicarbonate solid, and feeding the centrifuged mother liquor into a sodium bicarbonate mother liquor storage tank 26. The solid sodium bicarbonate is sent to a calciner 27 for calcination to obtain soda ash. The gas generated by calcination is passed through a second CO2The compressed gas is sent to the carbonization tower 9 to generate sodium bicarbonate after being compressed by the compressor 28. The mother liquor after the centrifugation of the sodium bicarbonate is sent to a second ammonia still 30 through a sodium bicarbonate mother liquor delivery pump 26, enters the second ammonia still 30 from the upper part of the second ammonia still 30, the bottom of the second ammonia still 30 is sent to a reboiler 31 through a sodium bicarbonate mother liquor delivery pump 32 to be heated, and then returns to the second ammonia still 30 to carry out the reaction on the unreacted HCO in the sodium bicarbonate mother liquor3 -And a portion of NH4+Evaporating to obtain NH3 and CO2The mixed gas, NH3, is absorbed by the ammonia absorption tower 21 to generate sodium sulfate ammoniated liquid, and unabsorbed CO2Gas, passing through the third CO2The compressed gas is compressed by the compressor 46 and sent to the precarbonizer 4. And sending the clear liquid after ammonia evaporation into a first reaction kettle 34 through a clear liquid delivery pump 33 for separating a first secondary salt, separating the first secondary salt through a first centrifuge 35 to obtain the first secondary salt, and sending the first secondary salt to a sodium sulfate powder bin 10 for preparing a sodium sulfate saturated liquid. The mother liquor separated by the first centrifuge 35 is stored in a first mother liquor storage tank 36 and sent to a second reaction kettle 38 by a first mother liquor delivery pump 37. The second reaction kettle 38 refines ammonium sulfate, secondary salt is obtained by separation through a second centrifuge 39, the secondary salt returns to the first reaction kettle 34, mother liquor obtained by centrifugation is stored in a second mother liquor storage tank 40, and the mother liquor is sent to an ammonium sulfate reaction kettle 42 through a # 2 mother liquor conveying pump 41. The mother liquor is evaporated and crystallized in the ammonium sulfate reaction kettle 42, agricultural ammonium sulfate is obtained after separation by an ammonium sulfate centrifuge 43, the centrifuged mother liquor is stored in an ammonium sulfate mother liquor storage tank 44, and the ammonium sulfate mother liquor is conveyed into the ammonium sulfate reaction kettle 42 by an ammonium sulfate mother liquor conveying pump 45 and enters the next round of ammonium sulfate evaporation.
The foregoing description of the invention is illustrative and not restrictive, and it will be understood by those skilled in the art that many changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. By using sodium sulfate and CO2The equipment for producing sodium carbonate and ammonium sulfate is characterized by comprising a sodium sulfate ammoniation liquid system, a sodium bicarbonate system, a soda ash system and an ammonium sulfate system;
the sodium sulfate ammoniation solution system comprises a waste ammonia water storage tank, a first ammonia still, an ammonia absorption tower, a mother solution storage tank and a sodium sulfate dissolving tank which are connected in sequence, wherein the ammonia absorption tower is connected with the sodium sulfate ammoniation solution storage tank through a heat exchanger;
the sodium bicarbonate system comprises first CO connected in sequence2The system comprises a compressor, a filter, a buffer tank, a carbonization tower, a tail gas absorption tower, a pre-carbonization tower and a water washing tower;
the soda system comprises a sodium bicarbonate thickener, a centrifugal machine, a calcining furnace and second CO which are connected in sequence2The centrifuge is also connected with a sodium bicarbonate mother liquor storage tank;
the ammonium sulfate system comprises a second ammonia still, a first reaction kettle, a second reaction kettle and an ammonium sulfate reaction kettle which are connected in sequence, wherein the second ammonia still forms circulation through a reboiler;
the carbonization tower is respectively connected with CO of the soda ash system2The compressor is connected with the sodium bicarbonate thickener, the second ammonia still is respectively connected with the sodium bicarbonate mother liquor storage tank and the ammonia absorption tower, and the pre-carbonization tower is connected with the ammonia absorption tower.
2. The use of sodium sulfate and CO according to claim 12The equipment for producing sodium carbonate and ammonium sulfate is characterized in that the top of the ammonia absorption tower is passed through a third CO2The compressor is connected with the pre-ammonia tower.
3. The use of sodium sulfate and CO according to claim 12Equipment for producing sodium carbonate and ammonium sulfate is characterized in that the bottom of a first reaction kettle of an ammonium sulfate system is sequentially connected with a first centrifuge and a first mother liquor tank, the first mother liquor tank is connected with a second reaction kettle, and the bottom of the second reaction kettle is sequentially connected with a second centrifugeAnd the second mother liquor tank is connected with the ammonium sulfate reaction kettle.
4. The method for producing sodium carbonate and ammonium sulfate by using the equipment of claim 1 comprises the following specific steps:
(1) CO in the mixed gas generated by the second ammonia still2Firstly, the mixture enters a pre-carbonization tower to pre-carbonize sodium sulfate ammoniated liquid, and the residual CO which is not absorbed2The gas enters a tail gas absorption tower to be CO2High concentration CO produced by gas and calciner2The gas enters a carbonization tower to react to generate sodium bicarbonate, and the unabsorbed gas enters a tail gas absorption tower to absorb CO2The flue gas is discharged from the tail gas absorption tower, and the gas enters a water washing tower for cleaning and emptying;
(2) feeding chemical residual ammonia water into a first ammonia still for concentration, cooling the ammonia gas by a cooler, introducing the ammonia gas into the lower part of an ammonia absorption tower, reversely contacting with sodium sulfate saturated liquid to generate sodium sulfate ammoniated liquid, cooling the ammoniated liquid by a heat exchanger to form the sodium sulfate ammoniated liquid, and feeding the sodium sulfate ammoniated liquid into a pre-carbonization tower for pre-carbonization;
(3) sending the sodium bicarbonate slurry into a sodium bicarbonate thickener, growing crystals, precipitating the crystals, centrifugally separating to obtain sodium bicarbonate solid, calcining in a calcining furnace to obtain soda ash, and sending gas generated by calcination into a carbonization tower to generate sodium bicarbonate;
(4) sodium bicarbonate mother liquor enters the second ammonia still from the upper part of the tower, is heated by a reboiler and returns to the tower, and NH is obtained by evaporation3And mixed gas of CO2, and clear liquid obtained after ammonia evaporation passes through a reaction kettle, and ammonium sulfate is obtained after refining and centrifugation.
5. The method for producing sodium carbonate and ammonium sulfate according to claim 4, wherein the first ammonia still concentrates the ammonia water to more than 85% by mass.
6. The method for producing sodium carbonate and ammonium sulfate according to claim 4, characterized in that the source of the saturated solution of sodium sulfate in step (2) is industrial solid waste sodium sulfate or industrial grade anhydrous sodium sulfate, and the secondary salt generated in the ammonium sulfate separation system.
7. The method for producing sodium carbonate and ammonium sulfate according to claim 4, wherein in the step (3), when the solid content of the sodium bicarbonate thickener reaches 50%, a sodium bicarbonate centrifuge is started, and sodium bicarbonate solid is obtained by centrifugal separation.
8. The process for the production of sodium carbonate and ammonium sulphate as claimed in claim 4 wherein the ammonium sulphate of step (4) has an agricultural grade nitrogen content of above 20%.
9. The method for producing sodium carbonate and ammonium sulfate according to claim 4, wherein the soda ash is produced in an amount of 10 million tons or more per year.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751429A (en) * | 2022-04-01 | 2022-07-15 | 北京赛科康仑环保科技有限公司 | Treatment process for preparing baking soda from desulfurized ash |
| CN117756140A (en) * | 2024-02-22 | 2024-03-26 | 南京新筛分科技实业有限公司 | process in sodium carbonate production |
-
2021
- 2021-10-30 CN CN202111278147.3A patent/CN113830795A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751429A (en) * | 2022-04-01 | 2022-07-15 | 北京赛科康仑环保科技有限公司 | Treatment process for preparing baking soda from desulfurized ash |
| CN114751429B (en) * | 2022-04-01 | 2023-06-23 | 北京赛科康仑环保科技有限公司 | Treatment process for preparing baking soda from desulfurized fly ash |
| CN117756140A (en) * | 2024-02-22 | 2024-03-26 | 南京新筛分科技实业有限公司 | process in sodium carbonate production |
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