CN110295067A - A kind of processing low-temp methanol washes the device and method of discharge gas containing hydrocarbon - Google Patents
A kind of processing low-temp methanol washes the device and method of discharge gas containing hydrocarbon Download PDFInfo
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- CN110295067A CN110295067A CN201910684709.0A CN201910684709A CN110295067A CN 110295067 A CN110295067 A CN 110295067A CN 201910684709 A CN201910684709 A CN 201910684709A CN 110295067 A CN110295067 A CN 110295067A
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- flash column
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 250
- 229930195733 hydrocarbon Natural products 0.000 title claims abstract description 20
- 150000002430 hydrocarbons Chemical class 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000004215 Carbon black (E152) Substances 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 171
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 71
- 238000010521 absorption reaction Methods 0.000 claims abstract description 42
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 36
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- 238000004064 recycling Methods 0.000 claims abstract description 24
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 20
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007701 flash-distillation Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 238000005406 washing Methods 0.000 claims description 11
- 239000000571 coke Substances 0.000 claims description 8
- 238000005262 decarbonization Methods 0.000 claims description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 230000023556 desulfurization Effects 0.000 claims description 8
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/001—Purifying combustible gases containing carbon monoxide working-up the condensates
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/005—Carbon dioxide
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Industrial Gases (AREA)
Abstract
The invention discloses the device and methods that a kind of processing low-temp methanol washes discharge gas containing hydrocarbon, are related to technical field of coal chemical industry, are related to low-temp methanol and wash.Including oven gas absorption tower, conversion gas absorption tower, flash column, carbon dioxide product tower, hydrogen sulphide concentration tower, nitrogen stripping tower, hot recycling tower, acid gas separating device, tail gas water scrubber, dashpot；Flash column top is oven gas processing section, and lower part is conversion gas processing section；Oven gas absorption tower lower part is connect with flash column top, and oven gas processing section is connect with nitrogen stripping tower；Conversion gas absorption tower lower part is connect with flash column lower part, and conversion gas processing section is successively connect with carbon dioxide product tower, hydrogen sulphide concentration tower, nitrogen stripping tower；Nitrogen stripping tower is connect with hot recycling tower, and hot recycling tower is connect with the gentle jet-bedding of acid gas separating device respectively.Hydrocarbonaceous flashed vapour in coke-stove gas process can be enriched with, recycle by the present invention, realize the recycling of exhaust gas, reduce equipment investment and operating cost.
Description
Technical field
The present invention relates to technical field of coal chemical industry, are related to low-temp methanol and wash, in particular to a kind of processing low-temp methanol, which is washed, to be contained
The device and method of hydrocarbon discharge gas.
Background technique
Low-temp methanol washes two strands of unstripped gas of cell processing, one is the raw gas that coal gasification generates, transformed by CO
Conversion gas, another stock are oven gas.The raw gas low-temp methanol wash journey that coal gasification generates is first to spray a small gangs of methanol
Into raw gas conversion gas, the dew point of conversion gas is reduced, transformation Gas Cooler is entered back into and multiply logistics exchanges heat, into conversion gas
Desulfurization section and decarbonization section are successively passed through in absorption tower, remove sulfide and CO by low temperature poor methanol in tower2, from conversion gas absorption tower
Top comes out, and methanol synthesis unit is sent after exchanging heat；Wherein absorption tower decarbonization section absorbs CO2- 22 DEG C of methanol rich solutions afterwards, big portion
Divide in entering and press flash column, small part enters absorption tower desulfurization section and absorbs H2Middle pressure flash column is entered back into after S, is depressurized respectively
Flash distillation, when two strands of solution flash, most of available gas (CO, H2) be desorbed out, converge in two strands of flashed vapour towers, heat exchange is sent
It is recycled to flash gas compression machine return system；Before oven gas enters low temperature washing device for methanol, with purified coke-stove gas
Purified gas heat exchange, enters back into coke-stove gas absorption tower and is washed, and sprays into a large amount of poor methanols from top, while absorbing coke-stove gas
In acid gas components and other sulfide, the rich methanol come out from bottom enter in press flash column, in flash distillation recycling methanol
CO, H of dissolution2Return compression recycles, the rich methanol after flash distillation enters hydrogen sulphide concentration tower, with come from hydrogen sulphide concentration tower
Upper section absorbs the rich methanol mixing in water-gas after sour gas, to from nitrogen stripper-overhead gas stripping gas and extractor at the top of
Prewashing flash gas washing.However, due to the CO of water-gas and oven gas regeneration process generation2Pneumatic transmission is discharged to tail gas water scrubber
Exhaust gas after washing meets the hydrocarbons in exhaust gas most currently without feasible processing technique because hydrocarbons content is high
New environmental emission standard requirement.
Therefore, find it is a kind of can in effective recycling discharge gas hydrocarbons method and apparatus, to solve low temperature first
Alcohol washes discharge gas containing hydrocarbon problem not up to standard, is this field technical problem urgently to be resolved.
Summary of the invention
The object of the present invention is to provide the devices that a kind of processing low-temp methanol washes discharge gas containing hydrocarbon.
It is a further object to provide a kind of methods that processing low-temp methanol washes discharge gas containing hydrocarbon.
The present invention is achieved by the following technical solutions:
A kind of processing low-temp methanol washes the device of discharge gas containing hydrocarbon, including oven gas absorption tower, conversion gas absorption tower, flash column,
Carbon dioxide product tower, hydrogen sulphide concentration tower, nitrogen stripping tower, hot recycling tower, acid gas separating device, tail gas water scrubber, buffering
Slot；The flash column is divided into four sections from top to bottom, and two sections of top is oven gas processing section, and two sections of lower part is transformation gas disposal
Section；Oven gas absorption tower lower part drain pipe is connect with flash column top oven gas processing section, oven gas processing section and nitrogen
Stripper connection；Conversion gas absorption tower lower part drain pipe is connect with flash column lower part conversion gas processing section, converts gas disposal
Duan Yici is connect with carbon dioxide product tower, hydrogen sulphide concentration tower, nitrogen stripping tower；The nitrogen stripping tower and hot recycling tower
Connection, the hot recycling tower are connect with the gentle jet-bedding of acid gas separating device respectively；The carbon dioxide product tower and hydrogen sulfide
The exhaust outlet of concentration tower is connect with tail gas water scrubber respectively.
Further, the drain pipe of the oven gas absorption tower lower part is connect with flash column first segment, at the top of flash column
First segment is connect by pipeline with flash column second segment.
The conversion gas absorption tower lower part is desulfurization section, and top is decarbonization section, the desulfurization section drain pipe and flash column
The connection of the 4th section of bottom, decarbonization section drain pipe are connect with flash column third section.
The bottom on the oven gas absorption tower is provided with filter.
Further, the invention also discloses using the above-mentioned apparatus processing low-temp methanol method of washing discharge gas containing hydrocarbon,
Step are as follows:
1) coke-stove gas is cooled to -23 DEG C~-27 DEG C, low-temp methanol liquid is sprayed, into coke-stove gas absorb the bottom of the tower prewashing
It is washed below first block of column plate of section, from the main methanol solution for washing -50 DEG C~-55 DEG C of penetrating at the top of section in top, prewashing section bottom
Prewashing methanol solution out is sent to extractor, and the main methanol solution of section bottom out of washing enters flash column first segment vacuum flashing；
2) gas jet methanol will be converted, Input transformation aspiration tower bottom after heat exchange is removed through -50 DEG C~-55 DEG C low-temp methanols
Sulfide and carbon dioxide, methanol rich solution input flash column lower part third section and the 4th section；
3) -30 DEG C~-36 DEG C of the methanol-rich liquid that flash column first segment bottom is sent out enters second segment, sends out from second segment bottom
Hydrocarbonaceous methanol enter nitrogen stripping tower and stripped, press flash column second from the gas input that nitrogen stripping top of tower comes out
Section bottom, further strips the rich methanol from first segment bottom, washs through rich methanol, forms circulation；
4) for the methanol rich solution on conversion gas absorption tower after flash column third section and the 4th section of flash distillation, methanol solution successively passes through titanium dioxide
After carbon products tower, the processing of hydrogen sulphide concentration tower, gas enters tail gas water scrubber and is handled, and liquid enters nitrogen stripping tower；
5) methanol solution is after the processing of nitrogen stripping tower, and successively after the processing of hot recycling tower, gas is handled through acid gas separating device, liquid
Body is through filter process.
Coke-stove gas and water-gas of the present invention are separately handled, i.e., after coke-stove gas low-temp methanol being washed absorption, the flash distillation of middle pressure
Rich methanol low pressure flash, nitrogen stripping gas Recycle network are a route, and water-gas low-temp methanol is washed methanol after absorption, flash distillation
Solution is successively a route into carbon dioxide absorption tower and hydrogen sulphide concentration tower, stripping Recycle network；When carrying out practically, coke oven
Before coal gas enters washing device for methanol, -27 DEG C~-23 DEG C are cooled to the heat exchange of purified coke oven gas purification gas, to prevent coke
Producer gas is cooled to dew point or less and freezes, and before it enters coke-stove gas cooler, a small gangs of methanol is ejected into coke oven
In coal gas, the dew point of coke-stove gas is reduced, enters back into below the column plate of the 1st block of coke-stove gas absorption tower lower part and is washed, coke oven
Coal gas absorption tower is arranged two sections, and lower section is prewashing section, washes section based on upper section, prewashing section first washs coke-stove gas, bottom
It send after the prewashing methanol solution filtering of -24 DEG C or so out to extractor, recycles flashed vapour, naphtha, wash a section top in master
A large amount of -52 DEG C or so of poor methanols are sprayed into above column plate, while absorbing acid gas components H2S, CO in coke-stove gas2And its
His sulfide, makes coke oven gas purification gas total sulfur < 0.1PPm, CO2≤ 20PPm, temperature are 25 DEG C, meet LNG cryogenic separation list
First air inlet requirement；First at the top of pressure flash column in the main rich methanol entrance washed below pars infrasegmentalis column plate in coke-stove gas absorption tower
Vacuum flashing is carried out above the filler of section top, the available gas of absorption is desorbed, -33 sent out at the top of flash column are therefrom pressed
DEG C or so flashed vapour re-heat send compression recycling to 30 DEG C；- 33 DEG C or so of the process sent out from first segment bottom
Rich methanol after middle pressure flash distillation presses filler top in flash column second segment top to carry out low pressure flash again in entering, from second segment bottom
Hydrocarbonaceous methanol after the flash distillation of submitting enters nitrogen stripping tower after the pressurization heat exchange of hydrocarbonaceous methanol pump and is stripped, from nitrogen vapour
The nitrogen stripping gas that stripper overhead comes out presses flash column second segment bottom in entering, and further strips the richness from first segment bottom
Methanol, while rich methanol further washs nitrogen stripping gas, is flashed in second segment, flashed vapour is at the top of second segment
It sends out, is mixed with the prewashing flashed vapour at the top of extractor, recycled as discharge gas containing hydrocarbon, first segment bottom after stripping
Methanol enter water-gas nitrogen stripping tower, be incorporated to regeneration postorder process；To which coke-stove gas low-temp methanol to be washed to the CO of generation2
The hydrocarbons recycling in gas is discharged, fuel gas is can be used as, makes the CO of low temperature washing device for methanol2Hydro carbons is practically free of in discharge gas
Substance.
The configuration of the present invention is simple can ensure CO2It discharges gas and realizes qualified discharge, by the hydrocarbonaceous flash distillation in coke-stove gas process
Gas enrichment, recycling, realize the recycling of exhaust gas, equipment investment cost and operating cost can be greatly reduced.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
In figure: 1- oven gas absorption tower, 2- flash column, 3- carbon dioxide product tower, 4- hydrogen sulphide concentration tower, 5- nitrogen stripping
Tower, 6- hot recycling tower, 7- acidity gas separating device, 8- tail gas water scrubber, 9- dashpot, 10- filter, 11- conversion gas absorption tower.
Specific embodiment
Below in conjunction with drawings and examples, the invention will be further described.
A kind of processing low-temp methanol as shown in Figure 1 washes the device of discharge gas containing hydrocarbon, including oven gas absorption tower 1, transformation
Aspiration tower 11, flash column 2, carbon dioxide product tower 3, hydrogen sulphide concentration tower 4, nitrogen stripping tower 5, hot recycling tower 6, sour gas
Separator 7, tail gas water scrubber 8, dashpot 9；The flash column 2 is divided into four sections from top to bottom, and two sections of top is at oven gas
Section is managed, two sections of lower part is conversion gas processing section；At the 1 lower part drain pipe of oven gas absorption tower and 2 top oven gas of flash column
Section connection is managed, oven gas processing section is connect with nitrogen stripping tower 5；The 44 lower part drain pipe of conversion gas absorption tower and flash column 2
Lower part conversion gas processing section connection, conversion gas processing section successively with carbon dioxide product tower 3, hydrogen sulphide concentration tower 4, nitrogen stripping
Tower 5 connects；The nitrogen stripping tower 5 is connect with hot recycling tower 6, and the hot recycling tower 6 is gentle with acid gas separating device 7 respectively
Jet-bedding 9 connects；The exhaust outlet of the carbon dioxide product tower 3 and hydrogen sulphide concentration tower 4 is connect with tail gas water scrubber 8 respectively.
The drain pipe of 1 lower part of oven gas absorption tower is connect with 2 first segment of flash column, and 2 top first segment of flash column passes through pipe
Road is connect with 2 second segment of flash column；11 lower part of conversion gas absorption tower is desulfurization section, and top is decarbonization section, the desulfurization section drain
The 4th section with 2 bottom of flash column of pipe connect, and decarbonization section drain pipe is connect with flash column third section；The bottom on oven gas absorption tower 1
It is provided with filter 10.
Step when operation are as follows: 1) a small gangs of methanol is ejected into coke-stove gas, reduces the dew point of coke-stove gas, enter back into
It is washed below 1st block of column plate of coke-stove gas absorption tower lower prewash section bottom, prewashing section first washes coke-stove gas
It washs, -24 DEG C or so of the prewashing methanol solution that bottom comes out is sent after being filtered to extractor, recycles flashed vapour, stone brain
Oil, on top, main wash above section upper tray sprays into a large amount of -52 DEG C or so of poor methanols, while absorbing the H in coke-stove gas2S、
CO2And other sulfide, make coke oven gas purification gas total sulfur < 0.1PPm, CO2≤ 20PPm, temperature are 25 DEG C, meet LNG deep cooling
Separative unit air inlet requirement, the pressure flash distillation tower top in the main rich methanol entrance washed below pars infrasegmentalis column plate in coke-stove gas absorption tower
Vacuum flashing is carried out above the filler of portion first segment top, the available gas of absorption is desorbed, and is therefrom pressed and is sent at the top of flash column
The flashed vapour re-heat of -33 DEG C or so out send compression recycling to 30 DEG C；2) gas jet methanol will be converted, it is defeated after heat exchange
Enter conversion gas absorb the bottom of the tower, through -50 DEG C~-55 DEG C low-temp methanol removing sulfide and carbon dioxide, the input of methanol rich solution is dodged
Steam tower third section and the 4th section；3) -30 DEG C~-36 DEG C of the methanol-rich liquid that flash column first segment bottom is sent out enters second segment,
The hydrocarbonaceous methanol sent out from second segment bottom enters nitrogen stripping tower and is stripped, and the gas come out from nitrogen stripping top of tower is defeated
Enter middle pressure flash column second segment bottom, further strips the rich methanol from first segment bottom, washed through rich methanol, formation follows
Ring；4) for the methanol rich solution on conversion gas absorption tower after flash column third section and the 4th section of flash distillation, methanol solution successively passes through titanium dioxide
After carbon products tower, the processing of hydrogen sulphide concentration tower, gas enters tail gas water scrubber and is handled, and liquid enters nitrogen stripping tower；5)
Methanol solution is after the processing of nitrogen stripping tower, and successively after the processing of hot recycling tower, gas is handled through acid gas separating device, and liquid passes through
Filter processing.
Claims (5)
1. the device that a kind of processing low-temp methanol washes discharge gas containing hydrocarbon, which is characterized in that including oven gas absorption tower, transformation aspiration
Receive tower, flash column, carbon dioxide product tower, hydrogen sulphide concentration tower, nitrogen stripping tower, hot recycling tower, acid gas separating device, tail gas
Water scrubber, dashpot；The flash column is divided into four sections from top to bottom, and two sections of top is oven gas processing section, and two sections of lower part is
Conversion gas processing section；Oven gas absorption tower lower part drain pipe is connect with flash column top oven gas processing section, at oven gas
Reason section is connect with nitrogen stripping tower；Conversion gas absorption tower lower part drain pipe is connect with flash column lower part conversion gas processing section,
Conversion gas processing section is successively connect with carbon dioxide product tower, hydrogen sulphide concentration tower, nitrogen stripping tower；The nitrogen stripping tower
It is connect with hot recycling tower, the hot recycling tower is connect with the gentle jet-bedding of acid gas separating device respectively；The carbon dioxide product
The exhaust outlet of tower and hydrogen sulphide concentration tower is connect with tail gas water scrubber respectively.
2. the device that processing low-temp methanol according to claim 1 washes discharge gas containing hydrocarbon, which is characterized in that the coke oven
The drain pipe of aspiration tower lower part is connect with flash column first segment, and first segment passes through pipeline and flash column second segment at the top of flash column
Connection.
3. the device that processing low-temp methanol according to claim 1 or 2 washes discharge gas containing hydrocarbon, which is characterized in that described
Conversion gas absorption tower lower part is desulfurization section, and top is decarbonization section, and the desulfurization section drain pipe is connect for the 4th section of tower bottom with flash distillation,
Decarbonization section drain pipe is connect with flash column third section.
4. the device that processing low-temp methanol according to claim 1 or 2 washes discharge gas containing hydrocarbon, which is characterized in that described
The bottom on oven gas absorption tower is provided with filter.
5. the method for washing discharge gas containing hydrocarbon using any one of claim 1-4 device processing low-temp methanol, which is characterized in that step
Are as follows:
1) coke-stove gas is cooled to -23 DEG C~-27 DEG C, low-temp methanol liquid is sprayed, into coke-stove gas absorb the bottom of the tower prewashing
It is washed below first block of column plate of section, from the main methanol solution for washing -50 DEG C~-55 DEG C of penetrating at the top of section in top, prewashing section bottom
Prewashing methanol solution out is sent to extractor, and the main methanol solution of section bottom out of washing enters flash column first segment vacuum flashing；
2) gas jet methanol will be converted, Input transformation aspiration tower bottom after heat exchange is removed through -50 DEG C~-55 DEG C low-temp methanols
Sulfide and carbon dioxide, methanol rich solution input flash column lower part third section and the 4th section；
3) -30 DEG C~-36 DEG C of the methanol-rich liquid that flash column first segment bottom is sent out enters second segment, sends out from second segment bottom
Hydrocarbonaceous methanol enter nitrogen stripping tower and stripped, press flash column second from the gas input that nitrogen stripping top of tower comes out
Section bottom, further strips the rich methanol from first segment bottom, washs through rich methanol, forms circulation；
4) for the methanol rich solution on conversion gas absorption tower after flash column third section and the 4th section of flash distillation, methanol solution successively passes through titanium dioxide
After carbon products tower, the processing of hydrogen sulphide concentration tower, gas enters tail gas water scrubber and is handled, and liquid enters nitrogen stripping tower；
5) methanol solution is after the processing of nitrogen stripping tower, and successively after the processing of hot recycling tower, gas is handled through acid gas separating device, liquid
Body is through filter process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910684709.0A CN110295067A (en) | 2019-07-26 | 2019-07-26 | A kind of processing low-temp methanol washes the device and method of discharge gas containing hydrocarbon |
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| CN201910684709.0A CN110295067A (en) | 2019-07-26 | 2019-07-26 | A kind of processing low-temp methanol washes the device and method of discharge gas containing hydrocarbon |
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| CN209940921U (en) * | 2019-07-26 | 2020-01-14 | 山西焦煤集团飞虹化工股份有限公司 | Device for treating low-temperature methanol-washed hydrocarbon-containing exhaust gas |
-
2019
- 2019-07-26 CN CN201910684709.0A patent/CN110295067A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB944256A (en) * | 1960-05-11 | 1963-12-11 | Metallgesellschaft Ag | Process for the selective absorption of sulphur compounds from gas mixtures |
| US20100111784A1 (en) * | 2007-02-22 | 2010-05-06 | Fluor Technologies Corporation | Configurations And Methods For Carbon Dioxide And Hydrogen Production From Gasification Streams |
| CN204874431U (en) * | 2015-07-14 | 2015-12-16 | 上海国际化建工程咨询公司 | Rectisol plant that methane rate of recovery is high |
| CN107033974A (en) * | 2017-04-21 | 2017-08-11 | 北京三泰天洁气体净化技术有限公司 | The method that low-temp methanol elution removes lighter hydrocarbons in crude synthesis gas, conversion gas |
| CN108977236A (en) * | 2018-08-29 | 2018-12-11 | 国家能源投资集团有限责任公司 | A kind of providing method of rectisol system and synthesis gas |
| CN209940921U (en) * | 2019-07-26 | 2020-01-14 | 山西焦煤集团飞虹化工股份有限公司 | Device for treating low-temperature methanol-washed hydrocarbon-containing exhaust gas |
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