CN203833908U - Natural gas deacidifying device - Google Patents
Natural gas deacidifying device Download PDFInfo
- Publication number
- CN203833908U CN203833908U CN201420217134.4U CN201420217134U CN203833908U CN 203833908 U CN203833908 U CN 203833908U CN 201420217134 U CN201420217134 U CN 201420217134U CN 203833908 U CN203833908 U CN 203833908U
- Authority
- CN
- China
- Prior art keywords
- acid gas
- pipeline
- interchanger
- flash
- tower
- 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.)
- Expired - Fee Related
Links
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses a natural gas deacidifying device which comprises an acid gas absorption tower. The acid gas absorption tower is respectively communicated with a mixer, a scrubber, an acid gas absorbent regeneration tower, a first flash evaporation tank and a second flash evaporation tank. A first flash evaporation pipe is communicated with the first flash evaporation tank and provided with a first flash evaporation valve. The upper portion of the first flash evaporation tank is communicated with the bottom of the acid gas absorbent regeneration tower through a compressor. A second backflow pipe is arranged on the lower portion of the second flash evaporation tank and communicated with a first backflow pump. The first backflow pump is respectively communicated with the acid gas absorbent regeneration tower and a second backflow pump through corresponding second backflow branches. The second backflow pump is used for being communicated with the acid gas absorption tower. Gas-phase poor absorbents obtained after flash evaporation are compressed through the compressor to reenter the middle lower portion of the acid gas absorbent regeneration tower to provide heat for the acid gas absorbent regeneration tower. Compared with the technology that steam in the equivalent amount is fully generated by a reboiler, energy consumption is saved.
Description
Technical field
The utility model relates to the field that catches acid gas from gaseous mixture, relates in particular to a kind of Sweet natural gas deacidifying device.
Background technology
It is predicted between 2005-2020, in the world to the demand of the energy with 1.7% speed increase every year on average.And to the demand of Sweet natural gas by the speed increment with the fastest, estimate before the year two thousand twenty by the demand exceeding coal.Sweet natural gas, as the more clean energy, has the advantage that transportation cost is low again simultaneously and gains great popularity.The mode of transport of Sweet natural gas mainly contains two kinds: through pipeline transportation or be liquefied as natural gas transportation, and the selection Main Basis shipment distance length of these two kinds of modes and Sweet natural gas volume and determine.
But no matter adopt any mode to transport, and all should pass through pre-treatment, remove the impurity such as sour gas in Sweet natural gas, water, heavy hydrocarbon, mercury.The present invention removes mainly for sour gas in Sweet natural gas.In Sweet natural gas, modal sour gas is H
2s, CO
2deng gas.H
2s is corrosive to metal implement, CO
2easily become solid separation, blocking pipe, also easily forms hydrate, corrosion pipeline.Acid stripping method has chemical absorption method, physical absorption method, physical chemistry associating absorption process, membrane separation process, low temperature processing etc.Generally adopt at present chemical absorption method, now preferred absorption agent is the aqueous solution of different amine, and amine used has MEA, DEA, DIPA, MDEA, Benfield etc. conventionally.
The amine method that tradition adopts removes the technical process of Sweet natural gas acid gas and installs as shown in Figure 1, comprises the equipment such as typical acid gas absorption tower, acid gas absorbent regeneration tower, acid gas absorption tower tower top washer, acid gas absorbent regeneration column overhead condenser, tower bottom reboiler.For many years, stable, depickling gas effect is better for the operation at home and abroad of this kind of technical process and device, but its energy consumption is relatively high, absorbs and regeneration efficiency also needs further raising.
Utility model content
In view of above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide a kind of Sweet natural gas deacidifying device, to reduce energy consumption.
For solving the problems of the technologies described above, the utility model scheme comprises:
A kind of Sweet natural gas deacidifying device, it comprises acid gas absorption tower, acid gas absorption tower is connected with mixing tank, washer, acid gas absorbent regeneration tower, the first flash tank, the second flash tank respectively, wherein, described acid gas absorbent regeneration tower bottom is provided with the first flash distillation pipeline, the first flash distillation pipeline is connected with the first flash tank, on the first flash distillation pipeline, is provided with the first flash valve; The first flash tank top is connected with acid gas absorbent regeneration tower bottom by a compressor, the first flash tank bottom is provided with the first return line, on the first return line, be provided with First Heat Exchanger and the second interchanger, the second interchanger is for being connected with acid gas absorption tower, and the second interchanger is connected with acid gas absorbent regeneration tower by the 3rd interchanger; Acid gas absorbent regeneration tower bottom is connected with reboiler by the first circulation line, and reboiler is connected with First Heat Exchanger, the 3rd interchanger respectively by the first backflow branch road of correspondence; Described acid gas absorbent regeneration top of tower is provided with the second flash distillation pipeline, the second flash distillation pipeline is connected with the second flash tank, on the second flash distillation pipeline, be provided with the first condenser, the second flash valve, the second flash tank top is for connecting the equipment of disacidify gas disposal, the second flash tank bottom is provided with the second return line, the second return line is connected with the first reflux pump, the first reflux pump is connected with acid gas absorbent regeneration tower, the second reflux pump respectively by the second backflow branch road of correspondence, and the second reflux pump is for being connected with acid gas absorption tower.
Described Sweet natural gas deacidifying device, wherein, bottom, described acid gas absorption tower one side is provided with the admission passage for importing pending Sweet natural gas, opposite side is provided with the first derivation pipeline, first derives pipeline is connected with the 4th interchanger, the 4th interchanger is connected with the second reflux pump by the first connecting pipeline, and the 4th interchanger is connected with bottom, acid gas absorption tower by the 3rd return line, is provided with the 3rd reflux pump on the 3rd return line; Bottom, described acid gas absorption tower is provided with the second derivation pipeline, and second derives pipeline is connected with the second interchanger, on the second derivation pipeline, is provided with lift pump.
Described Sweet natural gas deacidifying device, wherein, top, described acid gas absorption tower one side is provided with the importing pipeline for importing absorption agent, imports on pipeline and is provided with a mixing tank; Top, acid gas absorption tower is connected with washer by outlet pipe, and washer top is for connecting the equipment of dehydration; Mixing tank is connected with water supply device, washer respectively, and water supply device is connected with washer by water-supply line; Mixing tank is connected with the 4th reflux pump by the second condenser, and the 4th reflux pump is connected with the second interchanger by the second connecting pipeline.
Described Sweet natural gas deacidifying device, wherein, is provided with one for supplementing the supplementary pipeline of amine liquid on described mixing tank.
A kind of Sweet natural gas deacidifying device that the utility model provides, after acid gas absorbent regeneration tower is processed, its poor absorption agent directly enters in acid gas absorption tower and uses again, this process will be carried out flash distillation through flash valve and flash tank, the poor absorption agent of liquid phase after flash distillation is squeezed in acid gas absorption tower and is recycled, the poor absorption agent of gas phase after flash distillation reenters the heat that acid gas absorbent regeneration tower middle and lower part provides for acid gas absorbent regeneration tower after compressor compression, thereby can increase the amount of steam, and do not produce too much energy consumption, compared with the technique all being produced by reboiler with equivalent steam, save energy consumption, absorption and regeneration efficiency are improved, effectively utilize the heat of reboiler bottom liquid phases, the rich absorbent that enters acid gas absorbent regeneration tower is preheated, temperature when thereby raising rich absorbent enters acid gas absorbent regeneration tower, save energy.
Brief description of the drawings
Fig. 1 is the structural representation of Sweet natural gas deacidifying device in prior art;
Fig. 2 is the structural representation of Sweet natural gas deacidifying device in the present invention.
Embodiment
The utility model provides a kind of Sweet natural gas deacidifying device, for making the purpose of this utility model, technical scheme and effect clearer, clear and definite, below the utility model is further described.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of Sweet natural gas deacidifying device, as shown in Figure 2, it comprises acid gas absorption tower 1, acid gas absorption tower 1 is connected with mixing tank 2, washer 3, acid gas absorbent regeneration tower 4, the first flash tank 5, the second flash tank 6 respectively, and described acid gas absorbent regeneration tower 4 bottoms are provided with the first flash distillation pipeline 7, the first flash distillation pipeline 7 is connected with the first flash tank 5, is provided with the first flash valve 8 on the first flash distillation pipeline 7, the first flash tank 5 tops are connected with acid gas absorbent regeneration tower 4 bottoms by a compressor 9, the first flash tank 5 bottoms are provided with the first return line 10, on the first return line 10, be provided with First Heat Exchanger 11 and the second interchanger 12, the second interchanger 12 is for being connected with acid gas absorption tower 1, and the second interchanger 12 is connected with acid gas absorbent regeneration tower 4 by the 3rd interchanger 13, acid gas absorbent regeneration tower 4 bottoms are connected with reboiler 15 by the first circulation line 14, and reboiler 15 is connected with First Heat Exchanger 11, the 3rd interchanger 13 respectively by the first backflow branch road 16 of correspondence, described acid gas absorbent regeneration tower 4 tops are provided with the second flash distillation pipeline 17, the second flash distillation pipeline 17 is connected with the second flash tank 6, on the second flash distillation pipeline 17, be provided with the first condenser 18, the second flash valve 19, the second flash tank 6 tops are for connecting the equipment of disacidify gas disposal, the second flash tank 6 bottoms are provided with the second return line 20, the second return line 20 is connected with the first reflux pump 21, the first reflux pump 21 by the second corresponding backflow branch road 22 respectively with acid gas absorbent regeneration tower 4, the second reflux pump 23 is connected, the second reflux pump 23 is for being connected with acid gas absorption tower 4.
On the top of acid gas absorbent regeneration tower 4, with absorption agent body portion from after acid gas carry a certain amount of absorption agent and enter in the first condenser 18 and carry out condensation, enter the second flash tank 6 through the second flash valve 19, in the second flash tank 6, acid gas is separated with absorption agent, acid gas enters disacidify gas disposal technical process and equipment through the second flash tank 6, low temperature absorption agent enters the second return line 20, in the first reflux pump 21 is back to acid gas absorbent regeneration tower 4, carries out recycle.
In acid gas absorbent regeneration tower 4 bottoms, most of poor absorption agent enters in the first flash tank 5 and carries out flash distillation through the first flash distillation pipeline 7, the first flash valve 8, gas phase after flash distillation enters after compressor 9 compression heats up through pipeline, then enters acid gas absorbent regeneration tower 4 heat is provided; Liquid phase after flash distillation, enters First Heat Exchanger 11, the second interchanger 12 through the first return line 10, finally enters in acid gas absorption tower 1 and recycles.The method that poor absorption agent first carries out flash distillation has effectively utilized the heat of gas phase part after poor absorption agent flash distillation, thereby under less energy-consumption, increases the amount of steam, with the vapor phase ratio that only produces equivalent in traditional technology by reboiler 15, has saved energy.Meanwhile, in the first flash tank 5, acidic impurities is also flashed out as gas phase, and further separates with poor absorption agent, has improved to a certain extent separating effect, has improved the assimilated efficiency of poor absorption agent in acid gas absorption tower 1.
In acid gas absorbent regeneration tower 4, part still liquid enters in reboiler 15 through the first circulation line 14, part vaporization in reboiler 15, gas phase enters acid gas absorbent regeneration tower 4 heat is provided, a liquid phase part part for vaporization is not back in acid gas absorbent regeneration tower 4, and another part enters in First Heat Exchanger 11, the second interchanger 12, the 3rd interchanger 13 heat is provided through the first corresponding backflow branch road 16.In First Heat Exchanger 11, poor absorption agent absorbs heat; In the second interchanger 12, poor absorption agent transfers heat to rich absorbent; In the 3rd interchanger 13, rich absorbent further absorbs the heat of reboiler 15 bottom liquid phases of self-corresponding the first backflow branch road 16.These three interchanger effective heat that utilizes reboiler 15 bottom liquid phases is set, the rich absorbent that enters acid gas absorbent regeneration tower 4 is heated, thereby has improved temperature when rich absorbent enters acid gas absorbent regeneration tower 4, saved energy.
Of the present utility model described in another acid gas absorption tower 1 bottom one side be provided with the admission passage 24 for importing pending Sweet natural gas, opposite side is provided with the first derivation pipeline 25, first derives pipeline 25 is connected with the 4th interchanger 26, the 4th interchanger 26 is connected with the second reflux pump 23 by the first connecting pipeline 27, the 4th interchanger 26 is connected with 1 bottom, acid gas absorption tower by the 3rd return line 28, is provided with the 3rd reflux pump 29 on the 3rd return line 28; 1 bottom, described acid gas absorption tower is provided with the second derivation pipeline 30, the second derivation pipelines 30 and is connected with the second interchanger 12, on the second derivation pipeline 30, is provided with lift pump 31.Liquid with cooling from the condensed heat transfer fluid of the first connecting pipeline 27, then is returned in acid gas absorption tower 1 by the 3rd reflux pump 29 in the 4th interchanger 26.The setting of this side line cooling section, has reduced the temperature in acid gas absorption tower 1, has improved the receptivity of absorption agent, has improved assimilation effect, has reduced the regeneration times of acid gas absorption agent, thereby has reduced the energy consumption of reboiler 15, has saved energy.
Further, described acid gas absorption tower 1 top one side is provided with the importing pipeline 32 for importing absorption agent, imports on pipeline 32 and is provided with a mixing tank 2; 1 top, acid gas absorption tower is connected with washer 3 by outlet pipe 34, and washer 3 tops are for connecting the equipment of dehydration; Mixing tank 2 is connected with water supply device 33, washer 3 respectively, and water supply device 33 is connected with washer 3 by water-supply line 35; Mixing tank 2 is connected with the 4th reflux pump 37 by the second condenser 36, and the 4th reflux pump 37 is connected with the second interchanger 12 by the second connecting pipeline 38.In washer 3, water enters washer 3 middle and upper parts via water-supply line 35, and the amine absorption agent after washing enters after mixing tank 2 together with washings, enters in acid gas absorption tower 1 by importing pipeline 32; Sweet natural gas after washing enters natural gas dehydration process flow process and equipment.And on mixing tank 2, be provided with one for supplementing the supplementary pipeline 39 of amine liquid, in the time that natural qi exhaustion acid device inner absorbent is not enough, supplement in real time.
Certainly; more than explanation is only preferred embodiment of the present utility model; the utility model is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the instruction of this specification sheets; that makes is allly equal to alternative, obvious form of distortion, within all dropping on the essential scope of this specification sheets, ought to be subject to protection of the present utility model.
Claims (4)
1. a Sweet natural gas deacidifying device, it comprises acid gas absorption tower, acid gas absorption tower is connected with mixing tank, washer, acid gas absorbent regeneration tower, the first flash tank, the second flash tank respectively, it is characterized in that, described acid gas absorbent regeneration tower bottom is provided with the first flash distillation pipeline, the first flash distillation pipeline is connected with the first flash tank, on the first flash distillation pipeline, is provided with the first flash valve; The first flash tank top is connected with acid gas absorbent regeneration tower bottom by a compressor, the first flash tank bottom is provided with the first return line, on the first return line, be provided with First Heat Exchanger and the second interchanger, the second interchanger is for being connected with acid gas absorption tower, and the second interchanger is connected with acid gas absorbent regeneration tower by the 3rd interchanger; Acid gas absorbent regeneration tower bottom is connected with reboiler by the first circulation line, and reboiler is connected with First Heat Exchanger, the 3rd interchanger respectively by the first backflow branch road of correspondence; Described acid gas absorbent regeneration top of tower is provided with the second flash distillation pipeline, the second flash distillation pipeline is connected with the second flash tank, on the second flash distillation pipeline, be provided with the first condenser, the second flash valve, the second flash tank top is for connecting the equipment of disacidify gas disposal, the second flash tank bottom is provided with the second return line, the second return line is connected with the first reflux pump, the first reflux pump is connected with acid gas absorbent regeneration tower, the second reflux pump respectively by the second backflow branch road of correspondence, and the second reflux pump is for being connected with acid gas absorption tower.
2. Sweet natural gas deacidifying device according to claim 1, it is characterized in that, bottom, described acid gas absorption tower one side is provided with the admission passage for importing pending Sweet natural gas, opposite side is provided with the first derivation pipeline, first derives pipeline is connected with the 4th interchanger, the 4th interchanger is connected with the second reflux pump by the first connecting pipeline, and the 4th interchanger is connected with bottom, acid gas absorption tower by the 3rd return line, is provided with the 3rd reflux pump on the 3rd return line; Bottom, described acid gas absorption tower is provided with the second derivation pipeline, and second derives pipeline is connected with the second interchanger, on the second derivation pipeline, is provided with lift pump.
3. Sweet natural gas deacidifying device according to claim 1, is characterized in that, top, described acid gas absorption tower one side is provided with the importing pipeline for importing absorption agent, imports on pipeline and is provided with a mixing tank; Top, acid gas absorption tower is connected with washer by outlet pipe, and washer top is for connecting the equipment of dehydration; Mixing tank is connected with water supply device, washer respectively, and water supply device is connected with washer by water-supply line; Mixing tank is connected with the 4th reflux pump by the second condenser, and the 4th reflux pump is connected with the second interchanger by the second connecting pipeline.
4. Sweet natural gas deacidifying device according to claim 3, is characterized in that, is provided with one for supplementing the supplementary pipeline of amine liquid on described mixing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217134.4U CN203833908U (en) | 2014-04-30 | 2014-04-30 | Natural gas deacidifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217134.4U CN203833908U (en) | 2014-04-30 | 2014-04-30 | Natural gas deacidifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203833908U true CN203833908U (en) | 2014-09-17 |
Family
ID=51511777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420217134.4U Expired - Fee Related CN203833908U (en) | 2014-04-30 | 2014-04-30 | Natural gas deacidifying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203833908U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013296A (en) * | 2015-08-10 | 2015-11-04 | 中国石油集团工程设计有限责任公司 | Natural gas desulfuration and decarbonization system and method coupling acid gas concentration |
| 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 |
| CN116036838A (en) * | 2023-01-06 | 2023-05-02 | 江苏科技大学 | Carbon dioxide trapping system and method |
-
2014
- 2014-04-30 CN CN201420217134.4U patent/CN203833908U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105013296A (en) * | 2015-08-10 | 2015-11-04 | 中国石油集团工程设计有限责任公司 | Natural gas desulfuration and decarbonization system and method coupling acid gas concentration |
| CN105013296B (en) * | 2015-08-10 | 2017-06-06 | 中国石油集团工程设计有限责任公司 | A kind of selexol process decarbonization system and method for coupling acid gas concentrate |
| 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 |
| CN116036838A (en) * | 2023-01-06 | 2023-05-02 | 江苏科技大学 | Carbon dioxide trapping system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105013296B (en) | A kind of selexol process decarbonization system and method for coupling acid gas concentrate | |
| CN102806000B (en) | Energy-saving one-step rectisol method | |
| CN108744893B (en) | CO based on heat pipe enhanced heat recovery 2 Chemical absorption system and method | |
| CN204619690U (en) | A kind of coke-stove gas preparing liquefied natural gas carbon dioxide in process removes device | |
| CN106866368B (en) | Gas field alcohol-containing sewage methanol recovery device and process based on gas stripping method and vacuum membrane distillation method | |
| CN202751942U (en) | Sulphur tail gas absorption and purification combined device | |
| CN105233689B (en) | Organic amine wet flue gas desulphurization and desorption system with high-efficiency and low-energy consumption | |
| CN105664671B (en) | A kind of zero carbon emission technique gas purifying method and device | |
| CN203833908U (en) | Natural gas deacidifying device | |
| CN107715650A (en) | A kind of carbon trapping system regeneration gas heat recovery structure | |
| CN207533246U (en) | A kind of carbon trapping system regeneration gas heat reclaim unit | |
| CN104056462B (en) | A kind of heat pump distillation energy saver | |
| CN202460416U (en) | Recovery device of solvent in non-condensable gas containing solvent steam | |
| CN204891549U (en) | Natural gas desulfurization decarbonization system of coupling sour gas concentration | |
| CN202036906U (en) | NHD (polyethylene glycol dimethyl ether) desulfuration and decarburization condensate recycling system | |
| CN104043316B (en) | A kind of collecting carbonic anhydride of being coupled with low temperature multiple-effect distillation technology or piece-rate system | |
| CN209778320U (en) | System for coupling heat of pressurization deacidification ammonia distillation | |
| CN205710514U (en) | A kind of purifying ethylene glycol piece-rate system | |
| CN203989925U (en) | A kind of heat pump distillation energy saver | |
| CN205258394U (en) | Natural gas purifier | |
| CN204265446U (en) | A kind of magnesium nitric acid process produces the maximization production equipment of concentrated nitric acid | |
| CN108854456B (en) | System and method for recycling heat energy of desorption tower | |
| CN203517756U (en) | Steam recycling system of reeling machine | |
| CN203329583U (en) | Chlorine hydride absorption device in polycrystalline silicon tail gas recovery system | |
| CN202777885U (en) | Solvent distilled recovery device |
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 |
Granted publication date: 20140917 Termination date: 20150430 |
|
| EXPY | Termination of patent right or utility model |