CN220758035U - High-efficient ammonia stripping device of transform lime set single tower - Google Patents
High-efficient ammonia stripping device of transform lime set single tower Download PDFInfo
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- CN220758035U CN220758035U CN202322543134.5U CN202322543134U CN220758035U CN 220758035 U CN220758035 U CN 220758035U CN 202322543134 U CN202322543134 U CN 202322543134U CN 220758035 U CN220758035 U CN 220758035U
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- tower
- acid gas
- ammonia
- cooler
- stripping
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 63
- 235000008733 Citrus aurantifolia Nutrition 0.000 title description 2
- 235000011941 Tilia x europaea Nutrition 0.000 title description 2
- 239000004571 lime Substances 0.000 title description 2
- 239000002253 acid Substances 0.000 claims abstract description 62
- 238000005406 washing Methods 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000002994 raw material Substances 0.000 claims abstract description 37
- 238000007670 refining Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 18
- 230000023556 desulfurization Effects 0.000 claims abstract description 18
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 7
- 238000000746 purification Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 9
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 150000003863 ammonium salts Chemical class 0.000 abstract description 4
- 238000002425 crystallisation Methods 0.000 abstract description 4
- 230000008025 crystallization Effects 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 abstract description 3
- 239000011593 sulfur Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 49
- 238000000034 method Methods 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 5
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 5
- 238000005204 segregation Methods 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002309 gasification Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
The utility model relates to a condensate single-tower efficient ammonia stripping device, which aims to solve the problems that the existing device is unfavorable for environmental protection, the obtained dilute ammonia water has poor quality, high energy consumption and low recovery efficiency, and the utility model not only improves the efficiency of sulfur fixation, but also solves the problems of ammonium salt crystallization caused by temperature reduction, thereby blocking equipment and pipelines and the like by arranging a raw material water tank, a stripping tower, a primary preheater, a secondary preheater, a feed cooler, an acid gas washing tower, a washing liquid circulating pump, a circulating cooler, an acid gas heat exchanger, a washing liquid cooler, a primary condenser, a secondary condenser, an ammonia refining tower, a desulfurization circulating pump, a desulfurization cooler, a partial condenser and a purification water pump.
Description
Technical Field
The utility model belongs to the field of chemical production, and particularly relates to a single-tower efficient ammonia stripping device for converting condensate.
Background
During the coal gasification process, certain ammonia is generated, the ammonia is finally enriched in the conversion condensate, and the purpose of the conversion condensate stripping device is to remove the enriched ammonia, and then the condensate is recycled into the gasification system.
The conversion condensate stripping device mainly comprises a single-tower low-pressure stripping process and a double-tower pressurized stripping process at present, a large amount of ammonia is entrained in acid gas (CO 2 and H2S) generated by the single-tower pressurized stripping process, the acid gas is directly discharged to a torch to generate an environmental protection problem, and the obtained diluted ammonia water is poor in quality, is usually treated as a harmful substance and is not recovered as a resource. The double-tower pressurized stripping has strong adaptability to raw materials, but has the defects of high energy consumption, large investment and the like. In view of this, we propose a single-tower high-efficiency ammonia stripping device for the shift condensate. And ammonia quality is improved while ammonia escaping from the acid gas torch is recovered.
Disclosure of Invention
The method aims at solving the problems that the existing device is unfavorable for environmental protection, the quality of the obtained dilute ammonia water is poor, the energy consumption is high, the investment is large, and the recovery efficiency is low.
The utility model discloses a condensate-changing single-tower efficient ammonia stripping device, which comprises a raw material water tank, a stripping tower, an ammonia gas refining tower, a raw material water pump, a primary preheater, a secondary preheater, a feed cooler, an acid gas washing tower, a washing liquid circulating pump, a circulating cooler, an acid gas heat exchanger, a washing liquid cooler, a primary condenser, a secondary condenser, an ammonia gas refining tower, a desulfurization circulating pump, a desulfurization cooler, a partial condenser and a purifying water pump, wherein the raw material water pump is arranged in the raw material water tank;
the bottom of the raw material water tank is divided into two paths after being pressurized by a raw material water pump, one path is connected with the top of the stripping tower through a feeding cooler, and the other path is connected with the upper part of the stripping tower through a primary preheater and a secondary preheater in sequence;
the middle part of the stripping tower is connected with a first-stage dephlegmator through a first-stage preheater, the top of the first-stage dephlegmator is connected with a second-stage dephlegmator through a second-stage condenser, the bottoms of the first-stage dephlegmator and the second-stage dephlegmator are connected with the upper part of a raw material water tank through a dephlegmator cooler, the bottom of the stripping tower is connected with one path of the second-stage preheater through a purification water pump, the other path of the stripping tower is connected with the top of an acid gas washing tower through an acid gas heat exchanger and a washing liquid cooler, and the top of the acid gas washing tower discharges acid gas through the acid gas heat exchanger;
the top of the stripping tower is connected with the lower part of the acid gas washing tower, one path of the bottom of the acid gas washing tower is connected with the upper part of a raw material water tank through a washing liquid circulating pump and a circulating cooler, the other path of the bottom of the acid gas washing tower is connected with the upper part of the raw material water tank, and the top of the acid gas washing tower is connected with an external acid gas pipeline;
the top of the secondary dephlegmator is connected with the lower part of the ammonia refining tower, the bottom of the ammonia refining tower is connected with the upper part of the ammonia refining tower through a desulfurization circulating pump and a desulfurization cooler, the other path of the ammonia refining tower is connected with the upper part of the raw material water tank,
the top of the ammonia refining tower discharges ammonia outwards; the top of the ammonia refining tower is connected with external ammonia water through a pipeline.
The acid gas washing tower is divided into an upper section and a lower section, wherein the upper section is a washing section, and the lower section is a cooling section.
The stripping tower is divided into an upper section and a lower section, wherein the upper section adopts a filler form and is an ammonia absorption section, the lower section adopts a tray form and is an ammonia stripping section, and the middle part of the stripping tower is provided with a plurality of extraction ports so as to adapt to raw materials with different components.
The utility model has the advantages that:
the technology adopts a process route of side stripping, two-stage segregation, ammonia refining and acid gas purifying, has the advantages of small investment, low energy consumption and the like, and replaces a third-stage cooling segregation system with an ammonia refining tower, thereby improving the sulfur fixing efficiency and solving the problems of blocking equipment and pipelines and the like due to ammonium salt crystallization caused by cooling of the third-stage segregation. An acid gas washing tower is added before the acid gas is discharged, so that ammonia in the acid gas is further removed, and the environmental protection problem is avoided.
Drawings
FIG. 1 is a schematic illustration of the present utility model;
reference numerals illustrate:
1. a raw material water tank; 2. a raw material water pump; 3. a primary preheater; 4. a secondary preheater; 5. a feed cooler; 6. a stripping column; 7. an acid gas scrubber; 8. a washing liquid circulation pump; 9. a circulation cooler; 10. an acid gas heat exchanger; 11. a washing liquid cooler; 12. a first-stage dephlegmator; 13. a second-stage condenser; 14. a secondary dephlegmator; 15. an ammonia refining tower; 16. a desulfurization circulation pump; 17. a desulfurization cooler; 18. a partial condensate cooler; 19. and (5) purifying the water pump.
Detailed Description
As shown in fig. 1: the utility model relates to a condensate-changing single-tower efficient ammonia stripping device, which comprises a raw material water tank 1, a stripping tower 6, an ammonia refining tower 15, a raw material water pump 2, a primary preheater 3, a secondary preheater 4, a feed cooler 5, an acid gas washing tower 7, a washing liquid circulating pump 8, a circulating cooler 9, an acid gas heat exchanger 10, a washing liquid cooler 11, a primary condenser 12, a secondary condenser 13, a secondary condenser 14, an ammonia refining tower 15, a desulfurization circulating pump 16, a desulfurization cooler 17, a condensate-separating cooler 18 and a purifying water pump 19, wherein the raw material water tank is provided with a liquid inlet and a liquid outlet;
the bottom of the raw material water tank 1 is divided into two paths after being pressurized by the raw material water pump 2, one path is connected with the top of the stripping tower 6 through the feeding cooler 5, and the other path is connected with the upper part of the stripping tower 6 through the primary preheater 3 and the secondary preheater 4 in sequence;
the middle part of the stripping tower 6 is connected with a first-stage dephlegmator 12 through a first-stage preheater 3, the top of the first-stage dephlegmator 12 is connected with a second-stage dephlegmator 14 through a second-stage condenser 13, the bottoms of the first-stage dephlegmator 12 and the second-stage dephlegmator 14 are connected with the upper part of a raw material water tank 1 through a dephlegmator cooler 18, the bottom of the stripping tower 6 is connected with one path of the second-stage preheater 4 through a purification water pump 19 and the other path of the stripping tower is connected with the top of an acid gas washing tower 7 through an acid gas heat exchanger 10 and a washing liquid cooler 11, and the top of the acid gas washing tower 7 discharges acid gas through the acid gas heat exchanger 10;
the top of the stripping tower 6 is connected with the lower part of the acid gas washing tower 7, the bottom of the acid gas washing tower 7 is connected with the upper part of the raw material water tank 1 through a washing liquid circulating pump 8 and a circulating cooler 9, and the top of the acid gas washing tower 7 is connected with an external acid gas pipeline;
the top of the secondary dephlegmator 14 is connected with the lower part of the ammonia refining tower 15, the bottom of the ammonia refining tower 15 is connected with the upper part of the ammonia refining tower 15 through a desulfurization circulating pump 16 and a desulfurization cooler 17, the other path is connected with the upper part of the raw material water tank 1,
the top of the ammonia refining tower 15 discharges ammonia outwards; the top of the ammonia refining tower 15 is connected with external ammonia water through a pipeline.
The acid gas washing tower 7 is divided into an upper section and a lower section, wherein the upper section is a washing section, and the lower section is a cooling section.
The stripping tower 6 is divided into an upper section and a lower section, wherein the upper section adopts a filler form and is an ammonia absorption section, the lower section adopts a tray form and is an ammonia stripping section, and the middle part of the stripping tower is provided with a plurality of extraction ports so as to adapt to raw materials with different components.
The working process of the utility model comprises the following steps: the raw material from the raw material water tank 1 is pressurized by the raw material water pump 2 and then divided into two paths, one path is used as cold feed, the cold feed is cooled by the feed cooler 5 and then enters the top of the stripping tower 6, the other path is used as hot feed, primary heat exchange is carried out on the hot feed and side line gas through the primary preheater 3, secondary heat exchange is carried out on the hot feed and tower bottom liquid through the secondary preheater 4, then the hot feed and the tower bottom liquid enter the middle upper part of the stripping tower 6 for stripping, and the stripping tower 6 directly enters the lower part of the stripping tower 6 by using low-pressure steam as a heat source.
Ammonia, carbon dioxide and hydrogen sulfide are transferred from the liquid phase to the steam, and most of the ammonia, carbon dioxide and hydrogen sulfide enter the gas phase when reaching the upper section of the stripping tower 6; the cold feed absorbs ammonia and steam in the gas phase, in order to further reduce the ammonia content in the acid gas, the acid gas is introduced into the acid gas washing tower 7, a stream of purified water is introduced, the temperature is reduced by the washing liquid cooler 11, the water enters from the top of the acid gas washing tower 7, the upper part of the acid gas washing tower 7 is a washing section, the lower part is a cooling section, when the acid gas is purified and discharged, the main components are carbon dioxide and hydrogen sulfide, and in order to prevent ammonium salt crystallization, the acid gas is discharged outside after being heated by the acid gas heat exchanger 10.
Excess washing water from the acid gas washing tower 7 is led out from the circulation cooler 9 and returned to the raw material tank 1 for circulation.
In the ammonia enrichment area in the middle of the stripping tower 6, ammonia-containing steam is extracted from the side line of the stripping tower 6, is cooled and separated step by step through a first-stage preheater 3, a first-stage dephlegmator 12, a second-stage condenser 13 and a second-stage dephlegmator 14 respectively, and after being cooled by a first-stage dephlegmator 18, the first-stage condensate is returned to the raw material water tank 1 again, crude ammonia separated by the second-stage dephlegmator 14 enters an ammonia refining tower 15 for further cooling and removing hydrogen sulfide, a part of fresh ammonia water is supplemented from the top, redundant desulfurization liquid of the ammonia refining tower 15 is led out from the outlet of a desulfurization cooler 17 and returns to the raw material water tank 1 again for circulation.
The utility model relates to a single-tower high-efficiency ammonia stripping device for converting condensate, which has the advantages of small investment, low energy consumption and the like, and replaces a third-stage cooling segregation system with an ammonia refining tower 15, thereby improving the sulfur fixation efficiency and solving the problems of blocking equipment and pipelines and the like due to ammonium salt crystallization caused by cooling in the third-stage segregation. An acid gas washing tower 7 is added before the acid gas is discharged, so that ammonia in the acid gas is further removed, and the environmental protection problem is avoided.
Claims (3)
1. The utility model provides a transform condensate single-tower high-efficient ammonia stripping device, includes raw materials water pitcher (1), stripper (6), its characterized in that: the device also comprises an ammonia refining tower (15), a raw water pump (2), a primary preheater (3), a secondary preheater (4), a feed cooler (5), an acid gas washing tower (7), a washing liquid circulating pump (8), a circulating cooler (9), an acid gas heat exchanger (10), a washing liquid cooler (11), a primary dephlegmator (12), a secondary condenser (13), a secondary dephlegmator (14), an ammonia refining tower (15), a desulfurization circulating pump (16), a desulfurization cooler (17), a dephlegmator cooler (18) and a purification water pump (19);
the bottom of the raw material water tank (1) is divided into two paths after being pressurized by the raw material water pump (2), one path is connected with the top of the stripping tower (6) through the feeding cooler (5), and the other path is connected with the upper part of the stripping tower (6) through the primary preheater (3) and the secondary preheater (4) in sequence;
the middle part of the stripping tower (6) is connected with a first-stage dephlegmator (12) through a first-stage preheater (3), the top of the first-stage dephlegmator (12) is connected with a second-stage dephlegmator (14) through a second-stage condenser (13), the bottoms of the first-stage dephlegmator (12) and the second-stage dephlegmator (14) are connected with the upper part of a raw material water tank (1) through a dephlegmator cooler (18), the bottom of the stripping tower (6) is connected with one path of the second-stage preheater (4) through a purifying water pump (19) and the other path of the stripping tower is connected with the top of an acid gas washing tower (7) through an acid gas heat exchanger (10) and a washing liquid cooler (11), and the top of the acid gas washing tower (7) discharges acid gas through the acid gas heat exchanger (10);
the top of the stripping tower (6) is connected with the lower part of the acid gas washing tower (7), one path of the bottom of the acid gas washing tower (7) is connected with the middle part of the acid gas washing tower (7) through a washing liquid circulating pump (8) and a circulating cooler (9), the other path of the bottom of the acid gas washing tower is connected with the upper part of the raw material water tank (1), and the top of the acid gas washing tower (7) is connected with an external acid gas pipeline;
the top of the secondary dephlegmator (14) is connected with the lower part of the ammonia refining tower (15), the bottom of the ammonia refining tower (15) is connected with one path of the ammonia refining tower (15) through a desulfurization circulating pump (16) and a desulfurization cooler (17) and the other path of the ammonia refining tower is connected with the upper part of the raw material water tank (1),
the top of the ammonia refining tower (15) discharges ammonia outwards; the top of the ammonia refining tower (15) is connected with external ammonia water through a pipeline.
2. The single-tower high-efficiency ammonia stripping device for converting condensate as claimed in claim 1, wherein: the acid gas washing tower (7) is divided into an upper section and a lower section, wherein the upper section is a washing section, and the lower section is a cooling section.
3. The single-tower high-efficiency ammonia stripping device for converting condensate as claimed in claim 1, wherein: the stripping tower (6) is divided into an upper section and a lower section, the upper section adopts a filler form and is an ammonia absorption section, the lower section adopts a tray form and is an ammonia stripping section, and the middle part of the stripping tower is provided with a plurality of extraction ports so as to adapt to raw materials with different components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322543134.5U CN220758035U (en) | 2023-09-19 | 2023-09-19 | High-efficient ammonia stripping device of transform lime set single tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322543134.5U CN220758035U (en) | 2023-09-19 | 2023-09-19 | High-efficient ammonia stripping device of transform lime set single tower |
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| Publication Number | Publication Date |
|---|---|
| CN220758035U true CN220758035U (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322543134.5U Active CN220758035U (en) | 2023-09-19 | 2023-09-19 | High-efficient ammonia stripping device of transform lime set single tower |
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| Country | Link |
|---|---|
| CN (1) | CN220758035U (en) |
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2023
- 2023-09-19 CN CN202322543134.5U patent/CN220758035U/en active Active
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