CN220951198U - System for preparing sodium carbonate by combining high-salt type trona raw halogen with green ammonia and carbon fixation - Google Patents
System for preparing sodium carbonate by combining high-salt type trona raw halogen with green ammonia and carbon fixation Download PDFInfo
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- CN220951198U CN220951198U CN202322750331.4U CN202322750331U CN220951198U CN 220951198 U CN220951198 U CN 220951198U CN 202322750331 U CN202322750331 U CN 202322750331U CN 220951198 U CN220951198 U CN 220951198U
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- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 title claims abstract description 83
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 25
- 229910000029 sodium carbonate Inorganic materials 0.000 title claims abstract description 25
- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 22
- 150000002367 halogens Chemical class 0.000 title claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 21
- 241001625808 Trona Species 0.000 title claims abstract description 20
- 239000003513 alkali Substances 0.000 claims abstract description 44
- 238000003763 carbonization Methods 0.000 claims abstract description 19
- 150000003839 salts Chemical class 0.000 claims abstract description 19
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 42
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 26
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 21
- 239000001569 carbon dioxide Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 15
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 13
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 13
- 239000013078 crystal Substances 0.000 claims description 8
- 239000007791 liquid phase Substances 0.000 claims description 6
- 239000012071 phase Substances 0.000 claims description 6
- 239000007790 solid phase Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000012267 brine Substances 0.000 abstract description 5
- 230000008020 evaporation Effects 0.000 abstract description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 5
- 239000002910 solid waste Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000002425 crystallisation Methods 0.000 abstract description 4
- 230000008025 crystallization Effects 0.000 abstract description 4
- VQBIMXHWYSRDLF-UHFFFAOYSA-M sodium;azane;hydrogen carbonate Chemical compound [NH4+].[Na+].[O-]C([O-])=O VQBIMXHWYSRDLF-UHFFFAOYSA-M 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract 1
- 235000017550 sodium carbonate Nutrition 0.000 description 15
- 239000007789 gas Substances 0.000 description 12
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000011780 sodium chloride Substances 0.000 description 5
- 238000001354 calcination Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009621 Solvay process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical group [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The utility model provides a system for preparing sodium carbonate by combining high-salt trona raw halogen, green ammonia and carbon fixation, which comprises a carbonization tower, a first filter, a first dryer, a calciner, a first evaporator, a second filter, a second dryer, a combined alkali system, a carbon fixation pipeline and a green ammonia pipeline; the advantages are that: aiming at high-salt type trona raw halogen, a special alkali preparation system is provided, most alkali can be separated out through a carbonization tower, and the problem that the high-salt type trona raw halogen is subjected to evaporation crystallization to cause the salt content in an alkali product to exceed the standard can be avoided; the salt and alkali mixture obtained after the second dryer is used as a raw material to be sent into an alkali combination system, so that sodium carbonate and ammonium chloride are obtained, the salt is discharged out of the system, accumulation of salt in the system is avoided, resource utilization of solid waste can be realized, the treatment cost of the solid waste is saved, and certain economic benefit can be brought; the drainage of the system only has condensed water, and the content of salt in the trona raw brine can not be influenced after the condensed water is re-injected into an underground ore deposit.
Description
Technical field:
The utility model relates to a preparation system of sodium carbonate, in particular to a system for preparing sodium carbonate by combining high-salt sodium carbonate raw halogen, green ammonia and carbon fixation.
The background technology is as follows:
The soda production capacity in Asia is mainly concentrated in China, mainly an ammonia-soda process, a combined soda process and a natural soda process, and the existing ammonia-soda process and combined soda process have larger capacity, and along with the discovery and development of large-scale natural soda mineral resources in China, the natural soda process soda will develop and grow gradually, and become a mainstream soda production method in the world.
In the existing alkali extraction process, a unified treatment system and technology are adopted, and the salt content in the raw brine is not distinguished, so that the condition that the raw brine with lower salt content is directly subjected to a carbonization technology without concentration decrement treatment often occurs, so that the treatment capacity of equipment is large, the volume of the equipment is large, the treatment cost of the whole system is high, and the economic benefit of enterprises is seriously influenced; or directly evaporating the raw halogen with higher salt content to cause that the salt content in the obtained sodium carbonate product exceeds the standard, thereby causing that the product is unqualified.
The utility model comprises the following steps:
In order to solve the problems, the utility model aims to provide a system for preparing sodium carbonate by combining high-salt type trona raw halogen, green ammonia and carbon fixation.
The utility model is implemented by the following technical scheme:
A system for preparing sodium carbonate by combining high-salt type trona raw halogen, green ammonia and carbon fixation comprises a carbonization tower, a first filter, a first dryer, a calciner, a first evaporator, a second filter, a second dryer, a combined alkali system, a carbon fixation pipeline and a green ammonia pipeline;
The outlet of the carbonization tower is communicated with the inlet of the first filter through a pipeline, the solid phase outlet of the first filter is divided into two paths, one path is communicated with the feed inlet of the first dryer, and the discharge outlet of the first dryer is communicated with the feed inlet of the baking soda storage tank; the other path is communicated with a feed inlet of the calciner, and a discharge outlet of the calciner is communicated with a feed inlet of a soda storage tank;
The liquid phase outlet of the first filter is communicated with the liquid inlet of the first evaporator through a pipeline, the liquid outlet of the first evaporator is communicated with the liquid inlet of the second evaporator through a pipeline, the crystal slurry outlet of the second evaporator is communicated with the inlet of the second filter, the solid phase outlet of the second filter is communicated with the feed inlet of the second dryer, the discharge outlet of the second dryer is communicated with the raw material inlet of the alkali combination system, the outlet of the carbon fixing pipeline is communicated with the carbon dioxide inlet of the alkali combination system, and the outlet of the green ammonia pipeline is communicated with the ammonia inlet of the alkali combination system; the alkali outlet of the alkali combination system is communicated with the inlet of the sodium carbonate storage tank, and the salt outlet of the alkali combination system is communicated with the inlet of the ammonium chloride storage tank.
Further, the liquid outlet of the first evaporator is also communicated with the liquid inlet of the carbonization tower through a pipeline.
Further, the liquid phase outlet of the second filter is communicated with the liquid inlet of the second evaporator through a pipeline.
Further, the air outlets of the first evaporator and the second evaporator are communicated with the inlet of the first separator through pipelines, and the gas phase outlet of the first separator is communicated with the carbon dioxide inlet of the alkali combination system through pipelines.
Further, the tail gas outlet of the calciner is communicated with the inlet of the second separator through a pipeline, and the gas phase outlet of the second separator is communicated with the carbon dioxide inlet of the alkali combination system through a pipeline.
The utility model has the advantages that:
1. Compared with the traditional system, the utility model provides a special alkali preparation system aiming at the high-salt type trona raw halogen, and most alkali can be separated out through carbonization reaction in a carbonization tower, so that the problem that the high-salt type trona raw halogen is first evaporated and crystallized to cause the salt content in the obtained alkali product to exceed the standard can be avoided;
2. The salt and alkali mixture obtained after the second dryer is used as a raw material to be sent into an alkali combination system, so that sodium carbonate and ammonium chloride are obtained, the salt is discharged out of the system, and the salt is prevented from accumulating in the system to influence the quality of alkali products;
3. Meanwhile, the alkali mixture which is originally used as the solid waste is treated by an alkali combination system to obtain sodium carbonate and ammonium chloride, so that the resource utilization of the solid waste is realized, the treatment cost of the solid waste is saved, and certain economic benefit is brought;
4. The system does not discharge high-salt brine into the ground, only condensate is discharged from the system, and the content of salt in the trona raw brine is not affected after the condensate is re-injected into an underground ore deposit.
Description of the drawings:
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of system connection in this embodiment.
In the figure: the device comprises a carbonization tower 1, a first filter 2, a first dryer 3, a calciner 4, a first evaporator 5, a second evaporator 6, a second filter 7, a second dryer 8, a combined soda system 9, a baking soda storage tank 10, a soda storage tank 11, an ammonium chloride storage tank 12, a first separator 13, a second separator 14, a carbon fixing pipeline 15 and a green ammonia pipeline 16.
The specific embodiment is as follows:
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1:
The system for preparing the sodium carbonate by combining the high-salt type trona raw halogen with the green ammonia and the carbon fixation as shown in fig. 1 comprises a carbonization tower 1, a first filter 2, a first dryer 3, a calciner 4, a first evaporator 5, a second evaporator 6, a second filter 7, a second dryer 8, a combined alkali system 9, a carbon fixation pipeline 15 and a green ammonia pipeline 16; the first dryer 3 is a baking soda dryer; the calciner 4 is a sesquisoda calciner.
The outlet of the carbonization tower 1 is communicated with the inlet of the first filter 2 through a pipeline, the solid phase outlet of the first filter 2 is divided into two paths, one path is communicated with the feed inlet of the first dryer 3, and the discharge outlet of the first dryer 3 is communicated with the feed inlet of the baking soda storage tank 10; the other path is communicated with a feed inlet of the calciner 4, and a discharge outlet of the calciner 4 is communicated with a feed inlet of the soda storage tank 11; the tail gas outlet of the calciner 4 is communicated with the inlet of the second separator 14 through a pipeline, and the gas phase outlet of the second separator 14 is communicated with the carbon dioxide inlet of the combined alkali system 9 through a pipeline.
The liquid phase outlet of the first filter 2 is communicated with the liquid inlet of the first evaporator 5 through a pipeline, the liquid outlet of the first evaporator 5 is communicated with the liquid inlet of the second evaporator 6 through a pipeline, and the liquid outlet of the first evaporator 5 is also communicated with the liquid inlet of the carbonization tower 1 through a pipeline. The crystal slurry outlet of the second evaporator 6 is communicated with the inlet of the second filter 7, and the liquid phase outlet of the second filter 7 is communicated with the liquid inlet of the second evaporator 6 through a pipeline. The solid phase outlet of the second filter 7 is communicated with the feed inlet of the second dryer 8, the discharge outlet of the second dryer 8 is communicated with the raw material inlet of the combined alkali system 9, the outlet of the carbon fixing pipeline 15 is communicated with the carbon dioxide inlet of the combined alkali system 9, and the outlet of the green ammonia pipeline 16 is communicated with the ammonia inlet of the combined alkali system 9; the alkali outlet of the alkali combination system 9 is communicated with the inlet of the sodium carbonate storage tank 11, and the salt outlet of the alkali combination system 9 is communicated with the inlet of the ammonium chloride storage tank 12.
In this embodiment, the air outlets of the first evaporator 5 and the second evaporator 6 are both communicated with the inlet of the first separator 13 through a pipeline, and the gas phase outlet of the first separator 13 is communicated with the carbon dioxide inlet of the combined alkali system 9 through a pipeline.
The working description:
The system is suitable for high-salt type trona raw halogen, and the high-salt type raw halogen generally refers to sodium carbonate and sodium bicarbonate (sodium bicarbonate) with the content of more than or equal to 80g/L and sodium chloride with the content of more than or equal to 180g/L.
The high-salt trona raw halogen is firstly sent into a carbonization tower 1 to react with carbon dioxide gas to generate sodium bicarbonate crystals, sodium bicarbonate crystals obtained after filtration by a first filter 2 are partially sent into a first dryer 3 to be dried to obtain sodium bicarbonate products; and the other part is sent into a calciner 4 to decompose carbon dioxide by calcination to obtain a soda ash product. The carbon dioxide produced after calcination can be sent to the co-soda system 9 for use.
The filtered mother liquor obtained after the filtration of the first filter 2 contains sodium chloride and uncrystallized sodium carbonate, after the sodium chloride and the sodium chloride are evaporated and concentrated by the first evaporator 5, the concentration of the sodium carbonate and the sodium chloride is close to saturation, no crystallization is separated out, and a part of the sodium carbonate is returned to the carbonization tower 1 for recycling, so that the recycling rate of resources is improved; and the other part of the crystal is sent into a second evaporator 6 to obtain alkali-containing salt through evaporation and crystallization, the alkali-containing salt is filtered by a second filter 7, the filtered mother liquor is returned into the second evaporator 6 to participate in evaporation and crystallization again, the crystal obtained after filtration is dried by a second dryer 8 and then is used as a raw material to enter an alkali combination system 9 for treatment, and the crystal reacts with carbon dioxide gas and externally supplied green ammonia or gray ammonia to finally obtain sodium carbonate and ammonium chloride products.
In this embodiment, in the evaporation process of the first evaporator 5 and the second evaporator 6, part of the sodium bicarbonate in the trona raw halogen can decompose into carbon dioxide gas, meanwhile, water vapor can be generated in the evaporation process, the carbon dioxide gas and the water vapor enter the first separator 13 for separation, the separated carbon dioxide gas can enter the carbonization tower 1 for carbonization reaction, and the separated condensate water can be used for halogen production.
Meanwhile, in the calcining process of the calciner 4, carbon dioxide and moisture are decomposed after sodium bicarbonate is calcined, and the carbon dioxide is sent to the alkali combination system 9 after the sodium bicarbonate is subjected to a third separator.
The carbon fixation source required by the combined soda system 9 can be carbon dioxide generated by decomposition of sodium bicarbonate, carbon dioxide recovered from flue gas in the calcination process and carbon dioxide gas discharged by other coal chemical equipment.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The system for preparing the sodium carbonate by combining the high-salt type trona raw halogen, the green ammonia and the carbon fixation is characterized by comprising a carbonization tower, a first filter, a first dryer, a calciner, a first evaporator, a second filter, a second dryer, a combined alkali system, a carbon fixation pipeline and a green ammonia pipeline;
The outlet of the carbonization tower is communicated with the inlet of the first filter through a pipeline, the solid phase outlet of the first filter is divided into two paths, one path is communicated with the feed inlet of the first dryer, and the discharge outlet of the first dryer is communicated with the feed inlet of the baking soda storage tank; the other path is communicated with a feed inlet of the calciner, and a discharge outlet of the calciner is communicated with a feed inlet of a soda storage tank;
The liquid phase outlet of the first filter is communicated with the liquid inlet of the first evaporator through a pipeline, the liquid outlet of the first evaporator is communicated with the liquid inlet of the second evaporator through a pipeline, the crystal slurry outlet of the second evaporator is communicated with the inlet of the second filter, the solid phase outlet of the second filter is communicated with the feed inlet of the second dryer, the discharge outlet of the second dryer is communicated with the raw material inlet of the alkali combination system, the outlet of the carbon fixing pipeline is communicated with the carbon dioxide inlet of the alkali combination system, and the outlet of the green ammonia pipeline is communicated with the ammonia inlet of the alkali combination system; the alkali outlet of the alkali combination system is communicated with the inlet of the sodium carbonate storage tank, and the salt outlet of the alkali combination system is communicated with the inlet of the ammonium chloride storage tank.
2. The system for preparing sodium carbonate by combining high-salt type trona raw halogen, green ammonia and carbon fixation as claimed in claim 1, wherein the liquid outlet of the first evaporator is also communicated with the liquid inlet of the carbonization tower through a pipeline.
3. The system for preparing sodium carbonate by combining high-salt type trona raw halogen, green ammonia and carbon fixation as claimed in claim 1, wherein the liquid phase outlet of the second filter is communicated with the liquid inlet of the second evaporator through a pipeline.
4. The system for preparing sodium carbonate by combining high-salt type trona raw halogen, green ammonia and carbon fixation as claimed in claim 1, wherein the air outlets of the first evaporator and the second evaporator are communicated with the inlet of a first separator through pipelines, and the gas phase outlet of the first separator is communicated with the carbon dioxide inlet of the sodium carbonate combining system through pipelines.
5. The system for preparing sodium carbonate by combining high-salt type trona raw halogen, green ammonia and carbon fixation according to claim 1, wherein a tail gas outlet of the calciner is communicated with an inlet of a second separator through a pipeline, and a gas phase outlet of the second separator is communicated with a carbon dioxide inlet of the sodium carbonate combining system through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322750331.4U CN220951198U (en) | 2023-10-12 | 2023-10-12 | System for preparing sodium carbonate by combining high-salt type trona raw halogen with green ammonia and carbon fixation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322750331.4U CN220951198U (en) | 2023-10-12 | 2023-10-12 | System for preparing sodium carbonate by combining high-salt type trona raw halogen with green ammonia and carbon fixation |
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| Publication Number | Publication Date |
|---|---|
| CN220951198U true CN220951198U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322750331.4U Active CN220951198U (en) | 2023-10-12 | 2023-10-12 | System for preparing sodium carbonate by combining high-salt type trona raw halogen with green ammonia and carbon fixation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220951198U (en) |
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2023
- 2023-10-12 CN CN202322750331.4U patent/CN220951198U/en active Active
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