CN203781843U - System for treating Claus sulfur recovery tail gas by low-temperature methanol washing hydrogen sulfide concentrating tower - Google Patents
System for treating Claus sulfur recovery tail gas by low-temperature methanol washing hydrogen sulfide concentrating tower Download PDFInfo
- Publication number
- CN203781843U CN203781843U CN201420157093.4U CN201420157093U CN203781843U CN 203781843 U CN203781843 U CN 203781843U CN 201420157093 U CN201420157093 U CN 201420157093U CN 203781843 U CN203781843 U CN 203781843U
- Authority
- CN
- China
- Prior art keywords
- tail gas
- tower
- low
- sulfur recovery
- hydrogen sulfide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000007789 gas Substances 0.000 title claims abstract description 75
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 35
- 239000011593 sulfur Substances 0.000 title claims abstract description 35
- 238000011084 recovery Methods 0.000 title claims abstract description 30
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910000037 hydrogen sulfide Inorganic materials 0.000 title claims abstract description 25
- 238000005406 washing Methods 0.000 title claims abstract description 11
- 238000010791 quenching Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 239000007921 spray Substances 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 9
- GBMDVOWEEQVZKZ-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC GBMDVOWEEQVZKZ-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 11
- 238000005984 hydrogenation reaction Methods 0.000 description 8
- 239000005864 Sulphur Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 1
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 1
- ZNZNXSDPNKCWNO-UHFFFAOYSA-N S.CO Chemical compound S.CO ZNZNXSDPNKCWNO-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002608 ionic liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- FZGFIGTVHPIXJA-UHFFFAOYSA-N methanol;hydrate Chemical compound O.OC.OC FZGFIGTVHPIXJA-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
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- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses a system for treating Claus sulfur recovery tail gas by a low-temperature methanol washing hydrogen sulfide concentrating tower and belongs to the technical field of sulfur recovery and tail gas treatment, solving the technical problem that a system for treating sulfur recovery tail gas with the advantages of simplified operation, low investment cost and very low sulfur emission concentration and sulfur emission is provided. According to the technical scheme, the system for treating Claus sulfur recovery tail gas by a low-temperature methanol washing hydrogen sulfide concentrating tower comprises a Claus tail gas treatment system and a low-temperature methanol washing hydrogen sulfide concentrating system, sulfur recovery tail gas is hydrogenated and pressurized by the Claus tail gas treatment system and then enters into the low-temperature methanol washing hydrogen sulfide concentrating system, the hydrogenated tail gas is sprayed by a small amount of methanol and deeply cooled, the separated tail gas enter an H2S concentrating tower and H2S is recovered; the content of H2S in finally emitted tail gas can achieve to be less than or equal to 20mg/Nm<3>.
Description
Technical field
A kind of system of processing Sulfur Recovery Unit tail gas with low-temperature rectisol hydrogen sulfide upgrading tower of the utility model, belongs to sulfur recovery tail gas processing technology field.
Background technology
The recovery technology of sulfur route using in coal chemical engineering equipment is at present mainly high-temp combustion sulphur+claus catalytic reaction+vent gas treatment processed.The technology that high-temp combustion sulphur processed and claus catalytic reaction adopt is all identical, and difference is in vent gas treatment part.
Vent gas treatment mainly contains three kinds of modes: (1) tail gas hydrogenation+MDEA absorbs H
2s+ resolves H
2s gas returns to burner for producing sulfur+tail gas and burns; (2) tail gas burning+ionic liquid absorbs SO
2+ parsing SO
2gas returns to burner for producing sulfur; (3) tail gas burning+SO
2preparing sulfuric acid by oxidizing.Wherein technology (1) and (3) emission can reach SO
2≤ 400mg/Nm
3, technology (2) emission can reach SO
2≤ 200mg/Nm
3, all can meet current standards GB16297-1996 " atmosphere pollutants emission standards " SO
2≤ 960mg/Nm
3requirement.
GB16297-1996 " atmosphere pollutants emission standards " or will be substituted by new standard in July, 2014, new standard requires SO
2≤ 200mg/Nm
3or SO
2≤ 400mg/Nm
3.Prior art (1) and (3) may not meet the demands, technology (2) although meet the demands, owing to burning into SO
2return to burner for producing sulfur, cause roasting kiln oxygen requirement to reduce, furnace temperature reduces, and is unfavorable for NH
3decomposition.And all flow process is longer relatively for above three kinds of technology, operate more complicated, invest accordingly and running cost also large.
Patent CN 102631827 A relate to a kind of zero release sulfur recovery technique combining with low-temperature rectisol Acidic Gas Treating, and its method adopting is: the sulfur-containing tail gas hydrogenation after Crouse is reclaimed, makes sulfide all be converted into H
2s, then utilizes existing low-temp methanol hydrogen sulfide concentration systems and thermal regeneration system, obtains concentrated H
2s returns to Crouse's system again.The method claims that sulphur yield can reach 100% in theory.
Utility model content
The utility model overcomes the deficiencies in the prior art, and technical problem to be solved is to provide and a kind ofly simplifies the operation, cost of investment is low, sulphur emissions concentration and the extremely low system for sulfur recovery tail gas processing of quantity discharged.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: the system of processing Sulfur Recovery Unit tail gas with low-temperature rectisol hydrogen sulfide upgrading tower, comprise claus tail-gas clean-up system and low-temperature rectisol hydrogen sulfide concentration systems, described claus tail-gas clean-up system comprises: hydrogenator, vapour generator, quench tower and compressor, the outlet of described hydrogenator is communicated with the import of vapour generator, the outlet of described vapour generator is communicated with the opening for feed of quench tower, the tower top outlet of described quench tower is communicated with the import of compressor, the tower bottom outlet of described quench tower is in communication with the outside, described low-temperature rectisol concentration systems comprises methyl alcohol spray equipment, chiller, separator, H
2s upgrading tower and methanol-water knockout tower, the outlet of described compressor is communicated with chiller, described methyl alcohol spray equipment is arranged between compressor and chiller, before sulfur recovery tail gas enters chiller, sulfur recovery tail gas is carried out to a small amount of methyl alcohol spray, the outlet of described chiller is communicated with the opening for feed of separator, air outlet, top and the H of separator
2the import of S upgrading tower is communicated with, and the bottom liquid outlet of described separator is communicated with methanol-water knockout tower.
The refrigerant of described quench tower is water.
Described H
2the tower top tail gas outlet of S upgrading tower is directly communicated with atmosphere or is communicated with the inlet mouth of tail gas washing tower, emptying after again purifying.
Described whole system also should comprise the equipment configurations such as pump, gas blower, chimney and pipeline, and annexation and the configuration relation of itself and aforesaid device are the known technologies of this area.
System work process and principle explanation.
The sulfur recovery tail gas process hydrotreatment of sulphur recovery unstripped gas after high-temp combustion sulphur processed, Crouse's catalysis sulphur processed is by SO wherein
2all be converted into H
2s, tail gas after hydrogenation reclaims heat through vapour generator, be cooled to normal temperature through quench tower again, finally by compressor pressure-raising, the pressure of hydrogenation tail gas reached after the requirement of hydrogen sulfide upgrading tower and methanol-water knockout tower, after send battery limit (BL) to low temperature washing device for methanol; Hydrogenation tail gas after the freezing point that reduces water through a small amount of spray methyl alcohol enters chiller, and (heat-eliminating medium is ammonia or propylene, from the refrigeration system of low-temperature rectisol) enter separating tank after deep cooling and carry out gas-liquid separation, reducing hydrogenation tail gas is the water-content in rich hydrogen sulfide tail gas, liquid phase (methanol aqueous solution) after separation enters methanol-water knockout tower, and gas phase enters H
2s upgrading tower.H in gas phase
2s is at H
2in S upgrading tower, be washed down and enter at the bottom of tower in solution, other component in gas phase is with H
2the tail gas of S upgrading tower discharges atmosphere together, the H in final emission
2s≤20mg/Nm
3.
The utility model has carried out creationary application to existing low-temperature rectisol equipment, after chiller is arranged on to methyl alcohol spray equipment, methyl alcohol only sprays on a small quantity, its objective is the freezing point (reaching-40 DEG C does not freeze) that reduces water, make after chiller deep cooling, saturation steam content in hydrogenation tail gas greatly reduces, and has reduced the water-content entering in recycle methanol, has reduced the load of low temperature washing device for methanol methanol-water separation system; Gas after deep cooling enters hydrogen sulfide upgrading tower, CO
2, N
2discharge H from tower top with tail gas Deng gas
2at the bottom of S is concentrated in tower, thereby realize high-level efficiency sulfur recovery.
Compared with prior art the utlity model has following beneficial effect.
1, the utility model combines sulfur recovery unit and low temperature washing device for methanol, utilizes low-temperature rectisol existing installation to recycle tail gas, compares the technical process of sulfur recovery unit individual curing tail gas, and flow process is short, equipment is few, tail gas place is effective.
The tail gas H of final discharge
2s≤20mg/Nm
3, be equivalent to SO
2≤ 38mg/Nm
3, more much lower than existing sulfur recovery tail gas treatment technology.
2, the utility model is sent the tail gas after hydrogenation into the processing of hydrogen sulfide upgrading tower, compares the technique that enters Methanol Wash Column processing, and required pressure is much lower.
3, tail gas of the present utility model by chiller deep cooling, enters hydrogen sulfide upgrading tower after separation, compares the technique that directly enters hydrogen sulfide upgrading tower, has entered discharge reduction in recycle methanol a lot, has greatly reduced the impact on rectisol system.
The refrigeration system that derives from low-temp methanol device of cold, with respect to adopting other deep cooling mode to process tail gas, easy, energy-conservation.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure, 1 is hydrogenator, and 2 is vapour generator, and 3 is quench tower, and 4 is compressor, and 5 is methyl alcohol spray equipment, and 6 is chiller, and 7 is separator, and 8 is H
2s thickener, 9 is methanol-water knockout tower.
Embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
As shown in Figure 1:
Process the system of Sulfur Recovery Unit tail gas with low-temperature rectisol hydrogen sulfide upgrading tower, comprise claus tail-gas clean-up system and low-temperature rectisol hydrogen sulfide concentration systems, described claus tail-gas clean-up system comprises: hydrogenator 1, vapour generator 2, quench tower 3 and compressor 4, the outlet of described hydrogenator 1 is communicated with the import of vapour generator 2, the outlet of described vapour generator 2 is communicated with the opening for feed of quench tower 3, the tower top outlet of described quench tower 3 is communicated with the import of compressor 4, and the tower bottom outlet of described quench tower 3 is in communication with the outside; Described low-temperature rectisol concentration systems comprises methyl alcohol spray equipment 5, chiller 6, separator 7, H
2s upgrading tower 8 and methanol-water knockout tower 9; The outlet of described compressor 4 is communicated with chiller 6, described methyl alcohol spray equipment 5 is arranged between compressor 4 and chiller 6, before sulfur recovery tail gas enters chiller, sulfur recovery tail gas is carried out to a small amount of methyl alcohol spray, the outlet of described chiller 6 is communicated with the opening for feed of separator 7, air outlet, top and the H of separator 7
2the import of S upgrading tower 8 is communicated with, and the bottom liquid outlet of described separator 7 is communicated with methanol-water knockout tower 9.
The refrigerant of described quench tower 3 is water.
Described H
2the tower top tail gas outlet of S upgrading tower 8 is directly communicated with atmosphere or is communicated with the inlet mouth of tail gas washing tower, emptying after again purifying.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-described embodiment, in the ken possessing those of ordinary skill in the art, can also under the prerequisite that does not depart from the utility model aim, make various variations.
Claims (4)
1. process the system of Sulfur Recovery Unit tail gas with low-temperature rectisol hydrogen sulfide upgrading tower, comprise claus tail-gas clean-up system and low-temperature rectisol hydrogen sulfide concentration systems, described claus tail-gas clean-up system comprises: hydrogenator (1), vapour generator (2), quench tower (3) and compressor (4), the outlet of described hydrogenator (1) is communicated with the import of vapour generator (2), the outlet of described vapour generator (2) is communicated with the opening for feed of quench tower (3), the tower top outlet of described quench tower (3) is communicated with the import of compressor (4), the tower bottom outlet of described quench tower (3) is in communication with the outside, it is characterized in that: described low-temperature rectisol concentration systems comprises methyl alcohol spray equipment (5), chiller (6), separator (7), H
2s upgrading tower (8) and methanol-water knockout tower (9), the outlet of described compressor (4) is communicated with chiller (6), described methyl alcohol spray equipment (5) is arranged between compressor (4) and chiller (6), before sulfur recovery tail gas enters chiller, sulfur recovery tail gas is carried out to a small amount of methyl alcohol spray, the outlet of described chiller (6) is communicated with the opening for feed of separator (7), air outlet, top and the H of separator (7)
2the import of S upgrading tower (8) is communicated with, and the bottom liquid outlet of described separator (7) is communicated with methanol-water knockout tower (9).
2. the system of processing Sulfur Recovery Unit tail gas with low-temperature rectisol hydrogen sulfide upgrading tower according to claim 1, is characterized in that: the refrigerant of described quench tower (3) is water.
3. according to the system with low-temperature rectisol hydrogen sulfide upgrading tower processing Sulfur Recovery Unit tail gas described in right 1, it is characterized in that: described H
2the tower top tail gas outlet of S upgrading tower (8) is directly communicated with atmosphere.
4. according to the system with low-temperature rectisol hydrogen sulfide upgrading tower processing Sulfur Recovery Unit tail gas described in right 1, it is characterized in that: described H
2the tower top tail gas outlet of S upgrading tower (8) is communicated with the inlet mouth of tail gas washing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157093.4U CN203781843U (en) | 2014-04-02 | 2014-04-02 | System for treating Claus sulfur recovery tail gas by low-temperature methanol washing hydrogen sulfide concentrating tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157093.4U CN203781843U (en) | 2014-04-02 | 2014-04-02 | System for treating Claus sulfur recovery tail gas by low-temperature methanol washing hydrogen sulfide concentrating tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203781843U true CN203781843U (en) | 2014-08-20 |
Family
ID=51318051
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420157093.4U Expired - Fee Related CN203781843U (en) | 2014-04-02 | 2014-04-02 | System for treating Claus sulfur recovery tail gas by low-temperature methanol washing hydrogen sulfide concentrating tower |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523524A (en) * | 2015-12-29 | 2016-04-27 | 大连百傲化学股份有限公司 | Apparatus and method for producing highly pure hydrogen sulfide |
| CN106492607A (en) * | 2016-12-27 | 2017-03-15 | 中煤陕西榆林能源化工有限公司 | A kind of sulfur recovery is hydrogenated with the processing method and processing device of tail gas |
| CN106512650A (en) * | 2016-11-23 | 2017-03-22 | 北京丰汉工程技术有限公司 | Method and system for treating Claus process tail gas |
| CN107128882A (en) * | 2017-04-10 | 2017-09-05 | 华陆工程科技有限责任公司 | A kind of H2S claus reaction combinations low-temp methanol washs the sulfur recovery technology of tail gas |
| CN110314540A (en) * | 2019-07-19 | 2019-10-11 | 河南开祥精细化工有限公司 | A kind of low-temp methanol washes hydrogen sulphide disposal unit |
| CN110404374A (en) * | 2019-07-23 | 2019-11-05 | 西安超滤环保科技股份有限公司 | A kind of low-temp methanol washes periodic off-gases desulfurization Zero discharging system and technique |
-
2014
- 2014-04-02 CN CN201420157093.4U patent/CN203781843U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105523524A (en) * | 2015-12-29 | 2016-04-27 | 大连百傲化学股份有限公司 | Apparatus and method for producing highly pure hydrogen sulfide |
| CN106512650A (en) * | 2016-11-23 | 2017-03-22 | 北京丰汉工程技术有限公司 | Method and system for treating Claus process tail gas |
| CN106492607A (en) * | 2016-12-27 | 2017-03-15 | 中煤陕西榆林能源化工有限公司 | A kind of sulfur recovery is hydrogenated with the processing method and processing device of tail gas |
| CN107128882A (en) * | 2017-04-10 | 2017-09-05 | 华陆工程科技有限责任公司 | A kind of H2S claus reaction combinations low-temp methanol washs the sulfur recovery technology of tail gas |
| CN110314540A (en) * | 2019-07-19 | 2019-10-11 | 河南开祥精细化工有限公司 | A kind of low-temp methanol washes hydrogen sulphide disposal unit |
| CN110404374A (en) * | 2019-07-23 | 2019-11-05 | 西安超滤环保科技股份有限公司 | A kind of low-temp methanol washes periodic off-gases desulfurization Zero discharging system and technique |
| CN110404374B (en) * | 2019-07-23 | 2024-05-07 | 西安超滤环保科技股份有限公司 | Low-temperature methanol purge gas desulfurization zero-emission system and process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 |