CN203507776U - Comprehensive recovery system for exhaust of petrochemical plant - Google Patents
Comprehensive recovery system for exhaust of petrochemical plant Download PDFInfo
- Publication number
- CN203507776U CN203507776U CN201320671272.5U CN201320671272U CN203507776U CN 203507776 U CN203507776 U CN 203507776U CN 201320671272 U CN201320671272 U CN 201320671272U CN 203507776 U CN203507776 U CN 203507776U
- Authority
- CN
- China
- Prior art keywords
- percent
- petrochemical plant
- psa unit
- exhaust
- tail gas
- 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
Images
Landscapes
- Separation Of Gases By Adsorption (AREA)
Abstract
The utility model provides a comprehensive recovery system for the exhaust of a petrochemical plant. The comprehensive recovery system is characterized by comprising a pretreatment system (used for removing impurities) and three groups of pressure-variable absorption units (respectively used for obtaining olefin, alkane and hydrogen) which are connected in series, wherein each pressure-variable absorption unit consists of at least five absorption towers which are connected in parallel. According to the comprehensive recovery system, three groups of pressure-variable absorption units which are connected in series are adopted, respective special adsorbent is filled in each tower, and the process is completed automatically under the control of a DCS (distributed control system). About 80 percent of most valuable gas components in the exhaust of the petrochemical plant serve as chemical raw materials or products, so that the exhaust of the petrochemical plant is recovered and utilized comprehensively. The system is operated under normal temperature or a low temperature, and has low energy consumption, short process, high automation degree, low cost, and high yield and product purity. The yield of the olefin is greater than or equal to 90 percent, the purity of ethylene is greater than or equal to 95 percent, the yield of the hydrogen is greater than or equal to 90 percent, the purity can reach 99.9 percent, and the yield of the alkane is greater than or equal 95 percent. The exhaust treatment amount is large, and the system is applicable to different scales of petrochemical plants.
Description
Technical field
The utility model relates to tail gas recycle and utilizes field, is specifically a kind of petrochemical plant tail gas synthetic energy-saving discharge-reducing recovery system.
Background technology
Petrochemical plant tail gas is mist, and complicated component wherein contains 10-20% left and right for N
2, O
2and CO
2gas, 20-30% left and right is H
2, 30% left and right is methane, 30% left and right is hydro carbons (ethene, propylene, ethane, propane), other composition trace.In tail gas, 80% left and right is of great value industrial chemicals composition.
Past petrochemical plant is these tail gas high altitude discharges or apply a torch and burn, contaminated environment, also have now many enterprises it as cheap fuel, although alleviated pollution, also cause the wasting of resources.
Valuable gas alkene, hydrogen and alkane separation purifying in petrochemical plant tail gas, H
2can be directly used in the hydrogenation technique of petrochemical plant, ethene, propylene are exactly basic raw material and product, alkane be industrial chemicals be also high-quality clean fuel.
Reclaiming separated these gases has cryogenic separation, middle cold oil absorption, complexed absorption and decompressor method, and these technical matters and device are complicated, and equipment investment is large, energy consumption is high, cause the non-constant of device economic benefit.The nearly more than ten years have developed pressure-variable adsorption and membrane absorption method also has application, but because there is no efficient dedicated separation material, effective ingredient organic efficiency is low, and energy consumption is high, seriously restrict the valuable gas of comprehensive reutilization petrochemical plant tail gas.
Utility model content
The purpose of this utility model is to overcome the deficiency of existing technique, and the utility model improves, and at this, provides the system that a kind of petrochemical plant tail gas comprehensive high-efficiency reclaims, energy consumption is low; This patent adopts the psa unit of three groups of series connection, and each unit is comprised of a plurality of adsorption towers, loads Special adsorbent separately in tower.
The utility model is to realize like this, construct a kind of petrochemical plant tail gas comprehensive recovery system, it is characterized in that: the psa unit that comprises pretreatment system and three groups of series connection, each psa unit is comprised of many adsorption towers in parallel, wherein pretreatment system connects heat exchanger, heat exchanger output is connected with the first psa unit, and the first psa unit, the second psa unit and the 3rd psa unit become to be connected in series.
According to petrochemical plant tail gas comprehensive recovery system described in the utility model, it is characterized in that: each psa unit is comprised of at least 5 adsorption towers in parallel.
According to petrochemical plant tail gas comprehensive recovery system described in the utility model, it is characterized in that: between the first psa unit and the second psa unit and between the second psa unit and the 3rd psa unit, be provided with surge tank; During enforcement, the first psa unit (or second psa unit) tail gas air pressure out can be inhomogeneous, and height differs; Surge tank plays air inlet and acts on uniformly.
Petrochemical plant tail gas head is that pretreatment removes wherein harmful impurity, meets the requirement of later separation, and pretreatment can be absorbed or the constituting of two kinds of methods by high temperature adsorption solution.
Can adopt three groups of series systems to implement; The High Pressure Absorption unit of three groups of series connection can be distinguished every group and obtain a kind of product.Its series sequences of High Pressure Absorption capable of regulating of three groups of series connection, reduce production energy consumption, and according to project location market situation, only recycle petrochemical plant tail gas hydrogen or alkene or alkane, or combination ingredient arbitrarily wherein.Adopt sorbing material, one group of unit can meet the requirements of corresponding product purity and yield.Adopt sorbing material, one group of recyclable hydro carbons (comprising alkene, alkane) wherein in unit, for the raw material of petrochemical iy produced, then reclaims methane production natural gas wherein, the last hydrogen wherein that reclaims again, reaches more than 80% the comprehensive utilization ratio of petrochemical plant tail gas.
This patent adopts the psa unit of three groups of series connection, and each unit is comprised of at least 5 adsorption towers, loads Special adsorbent separately in tower.The gas ingredients that all absorbs the most worthy of contained 80% left and right in purifying tail gas, as industrial chemicals or product, is realized comprehensive reutilization.This adsorbent equipment moves under normal temperature or cryogenic conditions, energy consumption is low, flow process is short, automaticity is high, cost is low, yield and product purity high.Olefin yields >=90%-95%, ethene purity >=99%, hydrogen yield >=90%-95%, purity 99.9%, alkane yield >=95%.It is large-minded from 500-50000Nm that device is processed tail
3/ h is applicable to the petrochemical plant of different scales.
The beneficial effects of the utility model are: the utility model provides a kind of petrochemical plant tail gas comprehensive recovery system at this, utilize this system comprehensive industrial chemicals that reclaims from the tail gas of petrochemical plant discharge; This system adopts the psa unit of three groups of series connection, and each absorbing unit is composed in parallel by least 5 adsorption towers.Ethene, propylene in first group of adsorption cleaning tail gas is costly Organic Chemicals; Second group of adsorption cleaning hydrogen is also that petrochemical plant hydrogenation technique needs the special raw material of manufacturing; The 3rd adsorption cleaning be methane, be basic chemical raw materials, be also high-quality clean fuel.This patent olefin yields is greater than 90%, ethene purity 80-99%, hydrogen yield >=99.5%, methane yield >=95%, purity 90-99%.
Accompanying drawing explanation
Fig. 1 is the comprehensive industrial chemicals process chart that reclaims from petrochemical plant tail gas
Fig. 2 is the utility model petrochemical plant tail gas comprehensive recovery system structural representation
In figure: 1, pretreatment system 2, the first psa unit, the 2, second psa unit, the 3, the 3rd psa unit, the 4, the 3rd psa unit, 5, adsorption tower, 6, heat exchanger, 7, surge tank.
The specific embodiment
Below in conjunction with accompanying drawing, 1-2 is described in detail the utility model:
The utility model is achieved through the following technical solutions:
The utility model provides a kind of petrochemical plant tail gas comprehensive recovery system at this, the psa unit 2,3,4 that comprises pretreatment system 1 and three groups of series connection, each psa unit is comprised of at least 5 adsorption towers in parallel 5, wherein pretreatment system 1 connects heat exchanger 6, heat exchanger 6 outputs are connected 4 one-tenth of 2, the first psa units 2, the second psa unit 3 and the 3rd psa units and are connected in series with the first psa unit.
Between the first psa unit 2 and the second psa unit 3 and between the second psa unit 3 and the 3rd psa unit 4, be provided with surge tank 7.
A kind of pressure swing adsorption (PSA) that utilizes from petrochemical plant tail gas comprehensively reclaims alkene in tail gas, H
2with alkane technology, reclaim the industrial chemicals of three kinds of most worthies or 80% left and right that product accounts for tail gas total amount, its process comprises that first module pressure-variable adsorption is separated, by Special adsorbent adsorbs olefins gas in tower, comprise ethene, propylene, a small amount of butylene, with vacuumizing method, resolve.
The tail gas of first group of adsorption tower, send into second group of pressure-swing absorber, this adsorption tower loads hydrogen Special adsorbent, and the non-hydrogen impurity of absorption parses with vacuum pumping method.
Send into the 3rd group of adsorption tower through the tail gas of second group of pressure-swing absorber, in this tower, load alkane Special adsorbent, the alkane of absorption parses by the method vacuumizing.
Petrochemical plant tail gas will carry out pretreatment before carrying out pressure-variable adsorption, deviate from the harmful sour gas of adsorbent, steam etc.
The absorption and sorption tower of every kind of industrial chemicals is used special-purpose separately adsorbent.
The alkene parsing, hydrogen, alkane also will carry out respectively post processing, by smart removing impurities matter unit to become high-purity industrial chemicals or product.
Tail gas after three unit comprehensives reclaim, has the composition of chemical utilization value and contamination seldom, the remaining just O identical with air composition
2, N
2and CO
2so the tail gas after the 3rd unit absorption is emptying.
Sending into the first psa unit through pretreated tail gas mist, isolate ethene, propylene.This unit is comprised of at least 5 adsorption towers in parallel, and adsorbent is wherein alkene special use, vacuumizes the ethene, a propylene resolution gas part of acquisition as the displacement gas of product, and major part is sent into the output of post-processing unit essence removing impurities matter.
The tail gas that last unit was adsorbed to alkene is sent into the second absorbing unit, and the adsorption process of this unit is identical with last unit, and just adsorbent is hydrogen Special adsorbent.By vacuumizing acquisition resolution gas, this unit hydrogen recovery rate >=95%, purity 99.9% after the de-processing of essence.
The tail gas that adsorbed hydrogen through the second absorbing unit is sent into the 3rd absorbing unit, and tail gas is at this moment rich in alkane.In the 3rd absorbing unit tower, load alkane Special adsorbent, adsorption process is identical with the first two unit, by vacuumizing, parses methane, a small amount of second, propane, and its rate of recovery reaches more than 95%, through post processing purity 99%, directly sends and utilizes or reprocessing.
Tail gas major part after three unit absorption is the O of air composition
2, N
2and CO
2, organic matter composition has been trace, pollution-free, directly emptying.
Claims (3)
1. a petrochemical plant tail gas comprehensive recovery system, it is characterized in that: the psa unit (2,3,4) that comprises pretreatment system (1) and three groups of series connection, each psa unit is comprised of many adsorption towers in parallel (5), wherein pretreatment system (1) connects heat exchanger (6), heat exchanger (6) output is connected (2) with the first psa unit, and the first psa unit (2), the second psa unit (3) and the 3rd psa unit (4) become to be connected in series.
2. petrochemical plant tail gas comprehensive recovery system according to claim 1, is characterized in that: each psa unit is comprised of at least 5 adsorption towers in parallel (5).
3. petrochemical plant tail gas comprehensive recovery system according to claim 1, is characterized in that: between the first psa unit (2) and the second psa unit (3) and between the second psa unit (3) and the 3rd psa unit (4), be provided with surge tank (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671272.5U CN203507776U (en) | 2013-10-29 | 2013-10-29 | Comprehensive recovery system for exhaust of petrochemical plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320671272.5U CN203507776U (en) | 2013-10-29 | 2013-10-29 | Comprehensive recovery system for exhaust of petrochemical plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203507776U true CN203507776U (en) | 2014-04-02 |
Family
ID=50366761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320671272.5U Expired - Fee Related CN203507776U (en) | 2013-10-29 | 2013-10-29 | Comprehensive recovery system for exhaust of petrochemical plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203507776U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252984A (en) * | 2018-09-06 | 2019-01-22 | 北京铂陆氢能科技开发有限公司 | A kind of energy storage and distributed generation resource electricity generation system based on organic liquid hydrogen storage material |
-
2013
- 2013-10-29 CN CN201320671272.5U patent/CN203507776U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252984A (en) * | 2018-09-06 | 2019-01-22 | 北京铂陆氢能科技开发有限公司 | A kind of energy storage and distributed generation resource electricity generation system based on organic liquid hydrogen storage material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201842645U (en) | High-purity nitrogen generation system integrating membrane separation and pressure swing adsorption device | |
| CN110960956B (en) | CO in flue gas is absorbed to applicable phase transition absorbent 2 Method and system of (2) | |
| CN103170214B (en) | Method for recovering methane chloride from organic silicon synthetic tail gas | |
| CN101628198A (en) | Pressure-swing adsorption method of directly enriching methane from coal bed gas | |
| CN103752129A (en) | Device and process for separating and recycling non-methane total hydrocarbons and hydrogen gas from refinery dry gas | |
| CN104147896A (en) | Method for recovering adsorbed phase product by two stages of PSA | |
| CN104291280A (en) | High-efficiency molecular sieve nitrogen making machine | |
| CN202569906U (en) | Dry gas pressure swing adsorption (PSA) ethylene-and-hydrogen recycling device in oil refinery | |
| CN203781834U (en) | Medical modular PSA oxygen generator | |
| CN101724479B (en) | Method for pressure swing adsorption and concentration of methane | |
| CN102935324B (en) | Variable pressure absorption method for increasing absorption phase product yield | |
| CN203507776U (en) | Comprehensive recovery system for exhaust of petrochemical plant | |
| CN107759436B (en) | Method for preparing high-purity methane by adsorbing and separating methane nitrogen through simulated moving bed | |
| CN1279006C (en) | Method for purification and recovery of methane from refuse landfill gas | |
| CN1329103C (en) | Pressure-varying adsorption method for recovering vinyl chloride and acetylene from gas mixture | |
| CN213202874U (en) | Device for preparing high-purity trifluoromethane | |
| CN102698563B (en) | High purity and high recovery rate methane concentration production process and implementing device thereof | |
| CN101096907B (en) | Method for producing natural gas from coal bed gas under low pressure | |
| CN203663664U (en) | Device for separating and recovering hydrocarboncomponents and hydrogen from refinery dry gas | |
| CN212492394U (en) | Device system for recovering nitrogen in polyethylene device flare gas | |
| CN102921271B (en) | Improved process for recovering non-methane hydrocarbon in polyolefin tail gases by adsorption method | |
| CN102091501A (en) | Upper and lower pressure-equalizing pressure swing adsorption method | |
| CN204873823U (en) | Coke oven gas system liquefied natural gas's rich hydrogen tail gas processing apparatus | |
| CN202666657U (en) | Facility for collecting carbon dioxide and/or hydrogen sulfide from gas mixture | |
| CN105038881B (en) | A kind of method that pressure-variable adsorption continuously separates biogas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610041, No. 3, building 8, 1 North Bauhinia street, Chengdu hi tech Development Zone, Sichuan, 4 Patentee after: SICHUAN DKT ENERGY TECHNOLOGY CO., LTD. Address before: 610041, No. 3, building 8, 1 North Bauhinia street, Chengdu hi tech Development Zone, Sichuan, 4 Patentee before: Sichuan DKT Energy Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140402 Termination date: 20201029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |