CN204619690U - A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device - Google Patents
A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device Download PDFInfo
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- CN204619690U CN204619690U CN201520326787.0U CN201520326787U CN204619690U CN 204619690 U CN204619690 U CN 204619690U CN 201520326787 U CN201520326787 U CN 201520326787U CN 204619690 U CN204619690 U CN 204619690U
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- gas
- carbon dioxide
- regenerator
- pipeline
- cooler
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 47
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 47
- 239000007789 gas Substances 0.000 title claims abstract description 41
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 150000001412 amines Chemical class 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000010521 absorption reaction Methods 0.000 claims abstract description 16
- 238000010992 reflux Methods 0.000 claims abstract description 12
- 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 abstract description 5
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 abstract description 5
- 239000008246 gaseous mixture Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device, belongs to coke-stove gas preparing liquefied natural gas technical field; It comprises absorption tower, depickling Gas Cooler, rich amine flash tank, regenerator, carbon dioxide cooler, gas-liquid separator, regenerator reflux pump; Top, absorption tower is connected with depickling Gas Cooler entrance point pipeline, and bottom is connected with rich amine flash tank pipeline; Rich amine flash tank is connected with regenerator upper pipe, and regenerator top is connected with carbon dioxide cooler pipeline; Gas-liquid separator top is connected with carbon dioxide cooler pipeline, and bottom pipeline connects regenerator reflux pump, and regenerator reflux pump pipeline is connected to regenerator.This device absorbs unnecessary carbon dioxide with MDEA, greatly reduces carbon dioxide content in SNG gaseous mixture, efficiently solves the easy clogging of pipeline in ice chest, improve SNG productive rate, this device regenerates MDEA, recycles, and production cost significantly reduces.
Description
Technical field
After the utility model relates to a kind of coke-stove gas preparing liquefied natural gas methanation reaction, to the device that the incomplete carbon dioxide of reaction removes.Belong to coke-stove gas preparing liquefied natural gas technical field.
Background technology
At coke-stove gas preparing liquefied natural gas, can respond incomplete carbon dioxide.Carbon dioxide, following after SNG enters ice chest, can be condensed into rapidly solid-state, cause the pipeline in ice chest to occur blocking, cause have a strong impact on the safe operation of ice chest.
At present, the method for common carbon dioxide removal has membrane separation process and pressure swing adsorption method (PSA).Wherein membrane separation process need by SNG boost in pressure to more than 5MPa; PSA method easily makes SNG loss comparatively large, affects output.Therefore above two kinds of methods are used for the decarburization of coke-stove gas preparing liquefied natural gas, all can not reach gratifying effect.
For the safe operation making ice chest continue, improve the output of SNG, be necessary to design a kind of device, this device effectively can remove the carbon dioxide in SNG gaseous mixture, thoroughly solves the easy clogging of pipeline in ice chest.
Summary of the invention
Technical problem to be solved in the utility model removes the too much carbon dioxide contained in the SNG unstripped gas that causes because of mend carbon technology, after preventing carbon dioxide from entering ice chest, is converted into solid-state at low temperatures, makes pipeline in ice chest form blocking.
The technical scheme solved the problems of the technologies described above is:
A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device, and it comprises absorption tower, depickling Gas Cooler, rich amine flash tank, regenerator, carbon dioxide cooler, gas-liquid separator, regenerator reflux pump; Top, absorption tower is connected with depickling Gas Cooler entrance point pipeline, and bottom is connected with rich amine flash tank pipeline; Rich amine flash tank is connected with regenerator upper pipe, and regenerator top is connected with carbon dioxide cooler pipeline; Gas-liquid separator top is connected with carbon dioxide cooler pipeline, and bottom pipeline connects regenerator reflux pump, and regenerator reflux pump pipeline is connected to regenerator.
Above-mentioned a kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device, and the described depickling Gas Cooler port of export successively pipeline connects depickling gas gas-liquid separator, depickling gas gas-liquid filteration device.
Above-mentioned a kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device, and described rich amine flash tank connects regenerator through poor rich liquid heat exchanger pipeline.
Above-mentioned a kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device, and described regenerator bottom is connected with reboiler pipeline, and reboiler pipeline connects reboiler and divides flow container.
The beneficial effects of the utility model are:
This device absorbs unnecessary carbon dioxide with MDEA, greatly reduces carbon dioxide content in SNG gaseous mixture, efficiently solves the easy clogging of pipeline in ice chest, MDEA is regenerated simultaneously, can carbon dioxide removal, again can be cost-saving, raise the efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, mark is as follows: SNG entrance 1, absorption tower 2, depickling Gas Cooler 3, depickling gas gas-liquid separator 4, depickling gas gas-liquid filteration device 5, depickling gas outlet 6, rich amine flash tank 7, poor rich liquid heat exchanger 8, regenerator 9, reboiler 10, reboiler divide flow container 11, carbon dioxide cooler 12, carbon dioxide gas-liquid separator 13, lean pump 14, regenerator reflux pump 15, carbon dioxide emptying 16, flashed vapour emptying 17, lean solution cooler 18.
Detailed description of the invention
As shown in Figure 1, from the SNG of methane synthesizing section, if when the content of carbon dioxide is lower than 50ppm, can without deacidifying device depickling; If carbon dioxide content is higher than 50ppm in SNG, deacidifying device need be entered by carbon dioxide eliminating.
SNG depickling: the SNG from methane synthesizing section enters absorption tower 2 from the SNG entrance 1 of the bottom on absorption tower 2, flows from bottom to top; Amine liquid drench from top, absorption tower 2 into, and pass through absorption tower 2, the amine liquid of reverse flow and SNG are in tower after abundant transmission of heat by contact mass transfer, the sour gas such as the carbon dioxide in unstripped gas are by amine absorption, the amine liquid absorbing sour gas goes regenerator 9 to regenerate bottom absorption tower 2, depickling gas flows out from top, absorption tower 2, then enter depickling Gas Cooler 3 and be cooled to about 40 DEG C, through depickling gas gas-liquid separator 4 and depickling gas liquid separating filter 5, the amine liquid carried is separated again, deliver to demercuration, dewater unit.The amine liquid fully absorbing carbon dioxide is called rich amine aqueous solution.Rich amine aqueous solution from absorption tower 2 is decompressed to about 0.5MPa(G) enter rich amine flash tank 7 after rich amine aqueous solution, the gas be dissolved in rich amine solution is flashed off.
Rich amine aqueous solution after flash distillation enters poor rich liquid heat exchanger 8, enters regenerator 9, the carbon dioxide absorbed parsed in rich amine aqueous solution with the poor amine aqueous solution from regenerator 9 end after carrying out heat exchange intensification.Tower reactor utilizes low-pressure steam (saturated vapor of 0.5MPaG) heated reboiler 10, provides amine liquid to regenerate institute's calorific requirement.Regenerator 9 top wet acidic gas gas is out rich in carbon dioxide, is first cooled to about 40 DEG C through tower top carbon dioxide cooler 12, then enters carbon dioxide gas-liquid separator 13 separatory, the emptying of carbon dioxide self-separation device 13 top height point; Liquid phase, as overhead reflux, sends regenerator 9 back to through regenerator reflux pump 15.The amine liquid going out regenerator 9 is called poor amine aqueous solution, and poor amine aqueous solution goes out regenerator 9 at the bottom of tower, enters poor rich liquid heat exchanger 8 successively and lean solution cooler 18 is cooled to about 45 DEG C, then delivers to absorption tower 2 through lean pump 14.
This device can carbon dioxide in efficient removal SNG, efficiently solves the easy clogging of pipeline in ice chest, adopts the mode recycled to regenerate simultaneously to MDEA, can carbon dioxide removal, again can be cost-saving, improves SNG productive rate.
Claims (4)
1. coke-stove gas preparing liquefied natural gas carbon dioxide in process removes a device, it is characterized in that: it comprises absorption tower (2), depickling Gas Cooler (3), rich amine flash tank (7), regenerator (9), carbon dioxide cooler (12), gas-liquid separator (13), regenerator reflux pump (15); Absorption tower (2) top is connected with depickling Gas Cooler (3) entrance point pipeline, and bottom is connected with rich amine flash tank (7) pipeline; Rich amine flash tank (7) is connected with regenerator (9) upper pipe, and regenerator (9) top is connected with carbon dioxide cooler (12) pipeline; Gas-liquid separator (13) top is connected with carbon dioxide cooler (12) pipeline, and bottom pipeline connects regenerator reflux pump (15), and regenerator reflux pump (15) pipeline is connected to regenerator (9).
2. a kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process according to claim 1 removes device, it is characterized in that: depickling Gas Cooler (3) port of export successively pipeline connects depickling gas gas-liquid separator (4), depickling gas gas-liquid filteration device (5).
3. a kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process according to claim 1 removes device, it is characterized in that: rich amine flash tank (7) connects regenerator (9) through poor rich liquid heat exchanger (8).
4. a kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process according to claim 1 removes device, it is characterized in that: regenerator (9) bottom is connected with reboiler (10) pipeline, and reboiler (10) pipeline connects reboiler and divides flow container (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520326787.0U CN204619690U (en) | 2015-05-20 | 2015-05-20 | A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520326787.0U CN204619690U (en) | 2015-05-20 | 2015-05-20 | A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device |
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| Publication Number | Publication Date |
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| CN204619690U true CN204619690U (en) | 2015-09-09 |
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| CN201520326787.0U Expired - Fee Related CN204619690U (en) | 2015-05-20 | 2015-05-20 | A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695017A (en) * | 2016-04-25 | 2016-06-22 | 重庆耐德能源装备集成有限公司 | Natural gas purifying system |
| CN108048147A (en) * | 2018-01-26 | 2018-05-18 | 中海石油气电集团有限责任公司 | A kind of amine liquid regenerative system and technique applied to Floating Liquefied Natural Gas facility |
| CN108977234A (en) * | 2018-07-25 | 2018-12-11 | 戴乐亭 | A kind of decarbonization method of coke-stove gas and converter and/or blast furnace gas |
| CN108970332A (en) * | 2018-07-25 | 2018-12-11 | 戴乐亭 | A kind of decarbonization method of converter and/or blast furnace gas |
| CN109111341A (en) * | 2018-07-25 | 2019-01-01 | 戴乐亭 | The method of coke-stove gas and converter and/or blast furnace gas synthesizing glycol coproduction LNG |
| CN110591781A (en) * | 2019-10-13 | 2019-12-20 | 内蒙古恒坤化工有限公司 | System and method for producing liquefied natural gas by coke oven gas with adjustable decarburization |
| CN110628479A (en) * | 2019-09-26 | 2019-12-31 | 江苏城乡建设职业学院 | Energy-saving method and system for deep decarburization of natural gas |
| CN111690449A (en) * | 2020-06-18 | 2020-09-22 | 北京颖泓科技发展有限公司 | Energy-saving natural gas MDEA decarburization system and decarburization process thereof |
| CN118064198A (en) * | 2024-04-23 | 2024-05-24 | 新疆凯龙清洁能源股份有限公司 | Intelligent control method and system for removing carbon dioxide in natural gas |
-
2015
- 2015-05-20 CN CN201520326787.0U patent/CN204619690U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105695017A (en) * | 2016-04-25 | 2016-06-22 | 重庆耐德能源装备集成有限公司 | Natural gas purifying system |
| CN108048147A (en) * | 2018-01-26 | 2018-05-18 | 中海石油气电集团有限责任公司 | A kind of amine liquid regenerative system and technique applied to Floating Liquefied Natural Gas facility |
| CN108048147B (en) * | 2018-01-26 | 2023-11-21 | 中海石油气电集团有限责任公司 | Amine liquid regeneration system and process applied to floating liquefied natural gas facility |
| CN108977234A (en) * | 2018-07-25 | 2018-12-11 | 戴乐亭 | A kind of decarbonization method of coke-stove gas and converter and/or blast furnace gas |
| CN108970332A (en) * | 2018-07-25 | 2018-12-11 | 戴乐亭 | A kind of decarbonization method of converter and/or blast furnace gas |
| CN109111341A (en) * | 2018-07-25 | 2019-01-01 | 戴乐亭 | The method of coke-stove gas and converter and/or blast furnace gas synthesizing glycol coproduction LNG |
| CN108977234B (en) * | 2018-07-25 | 2020-08-04 | 戴乐亭 | Decarburization method for coke oven gas and converter and/or blast furnace gas |
| CN109111341B (en) * | 2018-07-25 | 2021-10-08 | 戴乐亭 | Method for synthesizing ethylene glycol and co-producing LNG (liquefied natural gas) by using coke oven gas and converter and/or blast furnace gas |
| CN110628479A (en) * | 2019-09-26 | 2019-12-31 | 江苏城乡建设职业学院 | Energy-saving method and system for deep decarburization of natural gas |
| CN110591781A (en) * | 2019-10-13 | 2019-12-20 | 内蒙古恒坤化工有限公司 | System and method for producing liquefied natural gas by coke oven gas with adjustable decarburization |
| CN111690449A (en) * | 2020-06-18 | 2020-09-22 | 北京颖泓科技发展有限公司 | Energy-saving natural gas MDEA decarburization system and decarburization process thereof |
| CN118064198A (en) * | 2024-04-23 | 2024-05-24 | 新疆凯龙清洁能源股份有限公司 | Intelligent control method and system for removing carbon dioxide in natural gas |
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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: 20150909 |