CN219984346U - Hydrogen chloride falling film absorption tail gas recycle device - Google Patents
Hydrogen chloride falling film absorption tail gas recycle device Download PDFInfo
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- CN219984346U CN219984346U CN202320994822.0U CN202320994822U CN219984346U CN 219984346 U CN219984346 U CN 219984346U CN 202320994822 U CN202320994822 U CN 202320994822U CN 219984346 U CN219984346 U CN 219984346U
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- tail gas
- compressor
- absorption tower
- valve
- outlet
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- 239000007789 gas Substances 0.000 title claims abstract description 111
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 84
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910000041 hydrogen chloride Inorganic materials 0.000 title claims abstract description 23
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 239000011552 falling film Substances 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 36
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000001257 hydrogen Substances 0.000 claims abstract description 24
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 24
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 238000004064 recycling Methods 0.000 claims abstract description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000010926 purge Methods 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 2
- 239000003595 mist Substances 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000006096 absorbing agent Substances 0.000 description 9
- 238000005406 washing Methods 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses a hydrogen chloride falling film absorption tail gas recycling device, which comprises a tail gas main pipe, wherein the tail gas main pipe is connected with a buffer tank, a tail gas oxygen analyzer, a tail gas tank outlet vent valve and a tail gas tank outlet switch valve are arranged on the buffer tank, the tail gas outlet switch valve is respectively connected with a first compressor and a second compressor, the first compressor and the second compressor are both connected with an absorption tower, the absorption tower is connected with a first circulating pump and a second circulating pump, the outlet ends of the first circulating pump and the second circulating pump are also connected with the absorption tower, and the first circulating pump and the second circulating pump are also connected with an absorption tower liquid level regulating valve through pipelines; the top of the absorption tower is provided with an alkali adding pipeline, the absorption tower is also provided with an absorption tower remote liquid level meter, and the outlet of the top of the absorption tower is connected with an inlet pipe of the hydrogen compressor. The utility model can effectively reduce the waste of hydrogen resources, realize the recycling of resources, effectively avoid the potential safety hazard caused by the discharge of hydrogen in the tail gas, and prevent trace acid mist in the tail gas from polluting the environment and corroding equipment.
Description
Technical Field
The utility model belongs to the technical field of tail gas recovery treatment process equipment, and particularly relates to a hydrogen chloride falling film absorption tail gas recovery utilization device.
Background
In the hydrogen chloride synthesis process in the chlor-alkali industry, chlorine and excessive hydrogen are combusted in a synthesis furnace to generate hydrogen chloride gas, most of the hydrogen chloride gas is sent to a synthetic vinyl chloride monomer, and part of the hydrogen chloride gas is absorbed by a falling film to produce hydrochloric acid for use by a production device or for sale. Excessive hydrogen in the hydrogen chloride gas sent to the vinyl chloride synthesis process can be recovered through a pressure swing adsorption device, but excessive hydrogen in the hydrochloric acid production process through falling film absorption can only be discharged to the environment through a tail gas tower (the tail gas contains 85-90% of hydrogen), so that on one hand, the waste of partial hydrogen resources is caused, on the other hand, the discharge of the hydrogen contained in the tail gas is easy to generate potential safety hazard, and trace acid mist pollutes the environment and corrodes equipment.
Disclosure of Invention
The utility model aims to provide a hydrogen chloride falling film absorption tail gas recycling device which can effectively avoid the discharge of hydrogen in tail gas.
The technical scheme includes that the hydrogen chloride falling film absorption tail gas recycling device comprises a tail gas main pipe, wherein the tail gas main pipe is connected with a plurality of tail gas tower blow-down pipes, the tail gas main pipe is connected to the inlet end of a buffer tank, a tail gas oxygen analyzer, a tail gas tank outlet blow-down valve and a tail gas tank outlet switch valve are arranged on a tail gas outlet pipeline at the top of the buffer tank, the tail gas outlet switch valve is respectively connected with a first compressor and a second compressor through pipelines, the first compressor and the second compressor are both connected with an absorption tower through pipelines, the bottom of the absorption tower is also respectively connected with a first circulating pump and a second circulating pump through pipelines, the outlet ends of the first circulating pump and the second circulating pump are also connected with the top of the absorption tower through connecting pipelines, and the connecting pipelines are provided with a circulating liquid pH analyzer; the outlet ends of the first circulating pump and the second circulating pump are also provided with absorption tower liquid level regulating valves; the top of the absorption tower is provided with an alkali adding pipeline, the alkali adding pipeline is provided with a circulating liquid pH regulating valve, the circulating liquid pH regulating valve is linked with a circulating liquid pH analyzer, the absorption tower is also provided with an absorption tower remote transmission liquid level meter, the absorption tower remote transmission liquid level meter is linked with the absorption tower liquid level regulating valve, and the outlet of the top of the absorption tower is connected with an inlet pipe of the hydrogen compressor.
The present utility model is also characterized in that,
a tail gas main valve is also arranged between the tail gas main pipe and the buffer tank; the tail gas oxygen analyzer is interlocked with a tail gas tank outlet vent valve and a tail gas tank outlet switch valve.
The bottom of the buffer tank is provided with a buffer tank clean valve, the top of the buffer tank is provided with a buffer tank remote transmission pressure gauge, a return pipeline between the outlet of the second compressor and the buffer tank is also provided with a buffer tank pressure regulating valve, and the buffer tank remote transmission pressure gauge is interlocked with the buffer tank outlet pressure regulating valve.
The pipeline between the tail gas outlet switch valve and the first compressor is provided with a first compressor inlet valve, and the pipeline between the tail gas outlet switch valve and the second compressor is provided with a second compressor inlet valve.
Be provided with first compressor outlet valve on the pipeline between first compressor and the absorption tower, be provided with the second compressor outlet valve on the pipeline between second compressor and the absorption tower, still be provided with compressor export teletransmission manometer and absorption tower tail gas inlet valve on the pipeline between first compressor, second compressor and the absorption tower, absorption tower bottom still is provided with the absorption tower and puts clean valve.
The first circulating pump is provided with a first circulating pump outlet valve, and the second circulating pump is provided with a second circulating pump outlet valve.
An absorption tower tail gas outlet valve is also arranged between the absorption tower and the hydrogen compressor inlet pipe.
The beneficial effects of the utility model are as follows: compared with the traditional pressure swing adsorption technology hydrogen purification device, the device adopts an alkali liquor washing mode to remove trace hydrogen chloride gas in the tail gas, and fully utilizes the cooling equipment of the existing device, thereby achieving the purpose of recycling hydrogen to the existing production system.
Drawings
Fig. 1 is a schematic structural diagram of a hydrogen chloride falling film absorption tail gas recycling device of the utility model.
In the figure, 1, a main tail gas pipe, 2, a tail gas tower blow-down pipe, 3, a buffer tank, 4, a first compressor, 5, a second compressor, 6, an absorber, 7, a first circulating pump, 8, a second circulating pump, 9, a tail gas main valve, 10, a buffer tank blow-down valve, 11, a tail gas oxygen analyzer, 12, a buffer tank remote pressure gauge, 13, a buffer tank outlet blow-down valve, 14, a buffer tank outlet tail gas switching valve, 15, a buffer tank pressure regulating valve, 16, a first compressor inlet valve, 17, a first compressor outlet valve, 18, a second compressor inlet valve, 19, a second compressor outlet valve, 20, a compressor outlet remote pressure gauge, 21, a circulating liquid pH regulating valve, 22, an absorber tail gas inlet valve, 23, an absorber purge valve, 24, an absorber remote liquid level gauge, 25, a circulating liquid pH analyzer, 26, an absorber tail gas outlet valve, 27, a first circulating pump outlet valve, 28, a second circulating pump outlet valve, 29, an absorber liquid level regulating valve, 30 and a hydrogen inlet pipe.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
The utility model relates to a hydrogen chloride falling film absorption tail gas recycling device, which is shown in figure 1, and comprises a tail gas main pipe 1, wherein the tail gas main pipe 1 is connected with a plurality of tail gas tower blow-down pipes 2, and each tail gas tower blow-down pipe 2 is provided with a switch valve and a blow-down valve;
the tail gas main pipe 1 is connected with the inlet end of the buffer tank 3, and a tail gas main valve 9 is arranged between the tail gas main pipe 1 and the buffer tank 3; the bottom of the buffer tank 3 is provided with a buffer tank emptying valve 10, a tail gas oxygen analyzer 11, a tail gas tank outlet emptying valve 13 and a tail gas tank outlet switching valve 14 are arranged on a tail gas outlet pipeline at the top of the buffer tank 3, wherein the tail gas oxygen analyzer 11 is interlocked with the tail gas tank outlet emptying valve 13 and the tail gas tank outlet switching valve 14, and a buffer tank remote transmission pressure gauge 12 is arranged at the top of the buffer tank 3;
the tail gas outlet switch valve 14 is respectively connected with the first compressor 4 and the second compressor 5 through pipelines, a first compressor inlet valve 16 is arranged on the pipeline between the tail gas outlet switch valve 14 and the first compressor 4, a second compressor inlet valve 18 is arranged on the pipeline between the tail gas outlet switch valve 14 and the second compressor 5, the first compressor 4 and the second compressor 5 are both connected with the absorption tower 6 through pipelines, a first compressor outlet valve 17 is arranged on the pipeline between the first compressor 4 and the absorption tower 6, and a second compressor outlet valve 19 is arranged on the pipeline between the second compressor 5 and the absorption tower 6;
the buffer tank pressure regulating valve 15 is connected with the outlet pipelines of the buffer tank 3 and the second compressor 5 respectively through pipelines, wherein the buffer tank remote transmission pressure gauge 12 is interlocked with the buffer tank outlet pressure regulating valve 15;
the utility model discloses a circulating liquid pH analyzer, including first compressor 4, second compressor 5 and absorption tower 6, still be provided with compressor export teletransmission manometer 20 and absorption tower tail gas import valve 22 on the pipeline between the absorption tower 6, absorption tower 6 bottom still is provided with absorption tower and puts clean valve 23, absorption tower 6 bottom still respectively through pipe connection first circulating pump 7 and second circulating pump 8, be provided with first circulating pump outlet valve 27 on the first circulating pump 7, be provided with second circulating pump outlet valve 28 on the second circulating pump 8, the exit end of first circulating pump 7 and second circulating pump 8 still passes through connecting tube with absorption tower 6 top and is connected, this connecting tube sets up circulating liquid pH analyzer 25.
The outlet ends of the first circulating pump 7 and the second circulating pump 8 are also connected with an absorption tower liquid level regulating valve 29 through pipelines; an alkali adding pipeline is arranged at the top of the absorption tower 6, a circulating liquid pH adjusting valve 21 is arranged on the alkali adding pipeline, the circulating liquid pH adjusting valve 21 is linked with a circulating liquid pH analyzer 25, an absorption tower remote transmission liquid level meter 24 is also arranged on the absorption tower 6, the absorption tower remote transmission liquid level meter 24 is linked with an absorption tower liquid level adjusting valve 29, and an outlet at the top of the absorption tower 6 is connected with a hydrogen press inlet pipe 30; an absorber tail gas outlet valve 26 is also arranged between the absorber 6 and the hydrogen compressor inlet pipe 30;
the utility model relates to a hydrogen chloride falling film absorption tail gas recycling device, which has the following specific working principle:
the tail gas header pipe 1 receives the tail gas from the tail gas tower blow-down pipe 2, the tail gas enters the buffer tank 3, the buffer tank 3 plays a buffering mixing role, a tail gas oxygen analyzer 11 is arranged at the outlet of the buffer tank 3, when the oxygen content of the detected tail gas exceeds the standard, the chain buffer tank outlet blow-down valve 13 is opened and is blown down, the chain buffer tank outlet tail gas switch valve 14 is closed, the chain buffer tank outlet tail gas switch valve 14 is opened when the oxygen content of the tail gas is normal, and the chain buffer tank outlet blow-down valve 13 is closed. The tail gas of buffer tank 3 gets into first compressor 4 or second compressor 5, and the compressor is used for improving tail gas pressure, and the two are reserve each other, and normal operating is one, and the tail gas of being convenient for can get into absorption tower and hydrogen house steward. The outlet of the compressor is provided with a return flow path which enters the buffer tank 3, and the buffer tank pressure regulating valve 15 is interlocked with the remote transmission pressure 12 of the buffer tank to control the pressure micro negative pressure of the buffer tank 3. The outlets of the first compressor 4 and the second compressor 5 are connected to a washing tower 6, the washing tower 6 is mainly used for removing trace hydrogen chloride in tail gas, the absorption tower 6 is supplemented with 5% sodium hydroxide solution through a circulating liquid pH adjusting valve 21, the first circulating pump 7 and the second circulating pump 8 (the circulating pumps are standby and normally operate) are used for spraying and washing, the washed tail gas enters a hydrogen compressor inlet pipe 30, a circulating liquid pH analyzer 25 is arranged on a washing liquid circulating pipeline to detect the pH change of the washing liquid, and the circulating liquid pH analyzer 25 is interlocked with the circulating liquid pH adjusting valve 21 of the washing tower; the second circulation pump outlet valve 28 is interlocked with the absorber remote level gauge 24. When the liquid level of the absorption tower is high, the waste water is discharged to a waste water system through a pump outlet drainage pipeline.
Claims (7)
1. The hydrogen chloride falling film absorption tail gas recycling device is characterized by comprising a tail gas main pipe (1), wherein the tail gas main pipe (1) is connected with a plurality of tail gas tower blow-down pipes (2), the tail gas main pipe (1) is connected with the inlet ends of buffer tanks (3), tail gas outlet pipelines at the tops of the buffer tanks (3) are provided with a tail gas oxygen analyzer (11), a tail gas tank outlet blow-down valve (13) and a tail gas tank outlet switch valve (14), the tail gas outlet switch valve (14) is respectively connected with a first compressor (4) and a second compressor (5) through pipelines, the first compressor (4) and the second compressor (5) are both connected with an absorption tower (6) through pipelines, the bottoms of the absorption tower (6) are also respectively connected with a first circulating pump (7) and a second circulating pump (8) through pipelines, the outlet ends of the first circulating pump (7) and the second circulating pump (8) are also connected with the tops of the absorption tower (6) through connecting pipelines, and the connecting pipelines are provided with a circulating liquid pH analyzer (25); the outlet ends of the first circulating pump (7) and the second circulating pump (8) are also connected with an absorption tower liquid level regulating valve (29) through pipelines; the utility model discloses a hydrogen compressor, including absorption tower (6), absorption tower (6), hydrogen compressor, absorption tower, hydrogen compressor, absorption tower (6) top is provided with the alkali adding pipeline, set up circulation liquid pH governing valve (21) on the alkali adding pipeline, circulation liquid pH governing valve (21) are linked with circulation liquid pH analyzer (25), still set up absorption tower teletransmission level gauge (24) on absorption tower (6), absorption tower teletransmission level gauge (24) are linked with absorption tower liquid level governing valve (29), hydrogen compressor inlet tube (30) are connected to absorption tower (6) top exit linkage.
2. The hydrogen chloride falling film absorption tail gas recycling device according to claim 1, wherein a tail gas main valve (9) is further arranged between the tail gas main pipe (1) and the buffer tank (3); the tail gas oxygen analyzer (11) is interlocked with a tail gas tank outlet vent valve (13) and a tail gas tank outlet switch valve (14).
3. The hydrogen chloride falling film absorption tail gas recycling device according to claim 1, wherein a buffer tank clean-out valve (10) is arranged at the bottom of the buffer tank (3), a buffer tank remote transmission pressure gauge (12) is arranged at the top of the buffer tank (3), a buffer tank pressure regulating valve (15) is further arranged on the buffer tank (3), the buffer tank pressure regulating valve (15) is further connected with an outlet pipeline of the second compressor (5) through a pipeline, and the buffer tank remote transmission pressure gauge (12) is interlocked with the buffer tank outlet pressure regulating valve (15).
4. The hydrogen chloride falling film absorption tail gas recycling device according to claim 1, wherein a first compressor inlet valve (16) is arranged on a pipeline between the tail gas outlet switch valve (14) and the first compressor (4), and a second compressor inlet valve (18) is arranged on a pipeline between the tail gas outlet switch valve (14) and the second compressor (5).
5. The hydrogen chloride falling film absorption tail gas recycling device according to claim 1, wherein a first compressor outlet valve (17) is arranged on a pipeline between the first compressor (4) and the absorption tower (6), a second compressor outlet valve (19) is arranged on a pipeline between the second compressor (5) and the absorption tower (6), a compressor outlet remote pressure gauge (20) and an absorption tower tail gas inlet valve (22) are further arranged on the pipeline between the first compressor (4), the second compressor (5) and the absorption tower (6), and an absorption tower purge valve (23) is further arranged at the bottom of the absorption tower (6).
6. The hydrogen chloride falling film absorption tail gas recycling device according to claim 1, wherein a first circulating pump outlet valve (27) is arranged on the first circulating pump (7), and a second circulating pump outlet valve (28) is arranged on the second circulating pump (8).
7. The hydrogen chloride falling film absorption tail gas recycling device according to claim 1, wherein an absorption tower tail gas outlet valve (26) is further arranged between the absorption tower (6) and the hydrogen compressor inlet pipe (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320994822.0U CN219984346U (en) | 2023-04-27 | 2023-04-27 | Hydrogen chloride falling film absorption tail gas recycle device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320994822.0U CN219984346U (en) | 2023-04-27 | 2023-04-27 | Hydrogen chloride falling film absorption tail gas recycle device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219984346U true CN219984346U (en) | 2023-11-10 |
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ID=88617391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320994822.0U Active CN219984346U (en) | 2023-04-27 | 2023-04-27 | Hydrogen chloride falling film absorption tail gas recycle device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219984346U (en) |
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2023
- 2023-04-27 CN CN202320994822.0U patent/CN219984346U/en active Active
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