CN203954988U - A kind of butadiene device for recovering tail gas - Google Patents
A kind of butadiene device for recovering tail gas Download PDFInfo
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- CN203954988U CN203954988U CN201420410949.4U CN201420410949U CN203954988U CN 203954988 U CN203954988 U CN 203954988U CN 201420410949 U CN201420410949 U CN 201420410949U CN 203954988 U CN203954988 U CN 203954988U
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Abstract
A butadiene device for recovering tail gas, comprises successively connected normal temperature separator, drying device, condensation separating unit, adsorbent equipment; Condensation separating unit comprises heat exchanger, the first cold catch pot, turbine expansion unit, and turbine expansion unit comprises expanding end, pressurized end; Drying device is connected with the first import of heat exchanger, the first outlet of heat exchanger connects the import of the first cold catch pot, the outlet of the first cold catch pot connects the expanding end entrance of turbine expansion unit, the outlet of turbine expansion unit expanding end is connected with the second import of heat exchanger, the second outlet of heat exchanger connects the entrance of the pressurized end of turbine expansion unit, and adsorbent equipment is connected with the outlet of the pressurized end of turbine expansion unit.The utility model has solved the complex structure that in prior art, butadiene device for recovering tail gas exists, and the problem that processing cost is high, energy consumption is high has simple in structurely, and processing cost is low, energy consumption is low, advantage easy to maintenance.
Description
Technical field
The utility model relates to petrochemical industry, says further, relates to a kind of butadiene device for recovering tail gas.
Background technology
Present stage, the main production of butadiene was to produce butadiene by butylene catalytic oxidative dehydrogenation, and the residual gas that this device produces is commonly called as butadiene tail gas.In butadiene tail gas, contain organic concentration higher (as pentane, hexane, heptane etc.), generally containing 4 % by weight.These are rich in organic waste gas and there is no at present industrial utilization value, can only send flare system burning to process.Can cause the very large wasting of resources so on the one hand, can cause serious pollution to environment on the other hand.If by being rich in organic tail gas recycle utilization in these waste gas, will greatly improve the economic benefit of butadiene product equipment.
At present, in prior art, conventional method is mainly to adopt absorption process to process waste gas, and operation principle is to utilize absorbent by absorption plant, the organic matter in waste gas to be absorbed, thereby reaches the object of purifying exhaust air.But the defect of this technology one is sorbing material high cost, need to often change; The 2nd, sorbing material need to carry out after-treatment, complex operation, and operating cost is high.
Summary of the invention
Goal of the invention of the present utility model is for having solved the complex structure that in prior art, butadiene device for recovering tail gas exists, the problem that processing cost is high, energy consumption is high is for solving problems of the prior art, and provide a kind of simple in structure, processing cost is low, energy consumption is low, butadiene device for recovering tail gas easy to maintenance.
The technical solution of the utility model is: comprise successively connected normal temperature separator, drying device, condensation separating unit, adsorbent equipment; Condensation separating unit comprises heat exchanger, the first cold catch pot, turbine expansion unit, and turbine expansion unit comprises expanding end T, pressurized end C; Drying device is connected with the first import of heat exchanger, the first outlet of heat exchanger connects the import of the first cold catch pot, the outlet of the first cold catch pot connects the expanding end T entrance of turbine expansion unit, the outlet of turbine expansion unit expanding end is connected with the second import of heat exchanger, the second outlet of heat exchanger connects the entrance of the pressurized end of turbine expansion unit, and adsorbent equipment is connected with the outlet of the pressurized end of turbine expansion unit.For again entering heat exchanger and carry out Cooling capacity exchanging carrying out tail gas after secondary gas-liquid separation, then enter after the pressurized end supercharging of turbine expansion unit outer defeated.Butadiene tail gas access charcoal adsorbent equipment after processing by turbine expansion unit can reach environment protection emission requirement, directly emptying after charcoal adsorbent equipment is processed.
Between described turbine expansion unit expanding end outlet and heat exchanger, be provided with the second cold catch pot.
The first import of described heat exchanger, the first outlet are respectively the import of hot limit, the outlet of hot limit, and the second import, the second outlet are respectively the import of cold limit, the outlet of cold limit.
Tail gas is processed in the import reception of described normal temperature separator, and the outlet of normal temperature separator connects the import of drying device.
Described drying device is molecular sieve drying device.
Described molecular sieve drying device comprises two molecular sieve drying tanks in parallel.
Described adsorbent equipment is charcoal adsorbent equipment.
The purification of the utility model butadiene tail gas drying, condensing heat-exchange, expansion are lowered the temperature by charcoal absorption.
The utility model is except having solved the high problem of operating cost, also concrete following characteristics in butadiene tail gas recycle process:
1. in traditional handicraft, butadiene tail gas enters to release flare middlely to be burnt as fuel, and the utility model reclaims the organic matter in waste gas get off, and can, using organic matter directly as industrial chemicals utilization, have higher economic benefit;
2. the utility model directly utilizes the pressure energy of butadiene tail gas, by turbo-expander, make pressure energy be transformed into low temperature cold, reduce the temperature of oil gas, turbo-expander itself does not need driven by power, it relies on the gas pressure of import to drive turbine rotation, externally acting, gas outlet pressure reduces, the outlet temperature 50 ℃ of left and right that can decline.This has saved energy consumption greatly, has also eliminated the noise that tail gas discharge with pressure causes;
3. the device in the utility model moves at low temperatures, the danger of not catching fire, burn, exploding;
4. in the utility model, butadiene tail gas is but arrived to-74 ℃, most of organic matter condensation can be got off, without other cryogens, save energy consumption;
5. the utility model flow process is simple, number of devices is few, small investment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1, butadiene tail gas, 2, normal temperature separator, 3, molecular sieve drying device, 4, heat exchanger, the 5, first cold catch pot, 6, turbine expansion unit, the 7, second cold catch pot, 8, charcoal adsorbent equipment, 9, emptying end gas.
The specific embodiment
In Fig. 1, the utility model comprises and being connected with butadiene tail gas 1 for the normal temperature separator 2 of gas-liquid separation, be connected with normal temperature separator 2 gas outlet ends for sloughing the molecular sieve drying device 3 of the free water of tail gas, the condensation separating unit being connected with molecular sieve drying device 3, the charcoal adsorbent equipment 8 for the organic matter of tail gas is reclaimed being connected with condensation separating unit.Condensation separating unit comprises heat exchanger 4, the first cold catch pot 5, turbine expansion unit 6, the second cold catch pot 7.Drying device 3 is connected with the hot limit import of heat exchanger 4, the hot limit outlet of heat exchanger 4 connects the import of the first cold catch pot 5, the outlet of the first cold catch pot 5 connects the expanding end T entrance of turbine expansion unit 6, the 6 expanding end T outlets of turbine expansion unit connect the import of the second cold catch pot 7, the outlet of the second cold catch pot 7 connects the cold limit import of heat exchanger 4, and the cold limit outlet of heat exchanger 4 connects the entrance of the pressurized end C of turbine expansion unit 6.Charcoal adsorbent equipment 8 is connected with the outlet of the pressurized end of turbine expansion unit 6.For again entering heat exchanger and carry out Cooling capacity exchanging carrying out tail gas after secondary gas-liquid separation, then enter after the pressurized end supercharging of turbine expansion unit outer defeated.Molecular sieve drying device comprises two molecular sieve drying tanks in parallel.
Butadiene tail gas 1 is processed in the air inlet reception of normal temperature separator 2, the gas outlet of normal temperature separator 2 connects the air inlet of molecular sieve drying device, the gas outlet of molecular sieve drying device connects the hot limit import of heat exchanger 4, the hot limit outlet of heat exchanger 4 connects the air inlet of the first cold catch pot 5, the gas outlet of the first cold catch pot 5 connects the expanding end entrance of turbine expansion unit 6, the expanding end outlet of turbine expansion unit 6 connects the air inlet of the second cold catch pot 7, the gas outlet of the second cold catch pot 7 connects the cold limit import of heat exchanger 4, the cold limit outlet of heat exchanger 4 connects the pressurized end entrance of turbine expansion unit 6, the pressurized end outlet of turbine expansion unit 6 connects the air inlet of charcoal adsorbent equipment 8, tail gas after processing is discharged from the gas outlet of charcoal adsorbent equipment 8, emptying end gas 9.
Butadiene method for recovering tail gas, comprises the following steps:
Step 1, dry: butadiene tail gas, after 2 gas-liquid separations of normal temperature separator, enters molecular sieve drying device 3 and sloughs the free water in tail gas, makes its depoint depression to below-80 ℃.
Step 2, condensation separation: the cryogenic gas after entering exchanger heat limit and the cold limit of heat exchanger and expand from turbo-expander from the tail gas of step 1 carries out condensing heat-exchange, make exhaust temperature be down to-25 ℃ of left and right, then enter in the first cold catch pot 5 and carry out gas-liquid separation, enter again turbine expansion unit 6 expanding end refrigeration, gas temperature after swell refrigeration is down to-74 ℃ of left and right, enter in the second Low Temperature Liquid separator 7 and carry out after gas-liquid separation, enter the cold limit of heat exchanger and exchanger heat limit gas carries out Cooling capacity exchanging, finally enter after the pressurized end supercharging of turbine expansion unit outer defeated, now, the organic matter of 98% quality is separated.
Step 3, absorption: from the gas of step 2, enter charcoal adsorbent equipment 8 and be further processed, after charcoal adsorption treatment is complete, the organic matter in tail gas more than contained 99.9% quality is recovered, reach emptying after environment protection emission requirement.
Claims (7)
1. a butadiene device for recovering tail gas, is characterized in that: comprise successively connected normal temperature separator (2), drying device (3), condensation separating unit, adsorbent equipment (8); Condensation separating unit comprises heat exchanger (4), the first cold catch pot (5), turbine expansion unit (6), and turbine expansion unit (6) comprises expanding end, pressurized end; Drying device (3) is connected with the first import of heat exchanger (4), the first outlet of heat exchanger (4) connects the import of the first cold catch pot (5), the outlet of the first cold catch pot (5) connects the expanding end entrance of turbine expansion unit (6), the outlet of turbine expansion unit (6) expanding end is connected with the second import of heat exchanger (4), the second outlet of heat exchanger (4) connects the entrance of the pressurized end of turbine expansion unit (6), and adsorbent equipment (8) is connected with the outlet of the pressurized end of turbine expansion unit (6).
2. butadiene device for recovering tail gas according to claim 1, is characterized in that: between the outlet of described turbine expansion unit (6) expanding end and heat exchanger (4), be provided with the second cold catch pot (7).
3. butadiene device for recovering tail gas according to claim 1, is characterized in that: the first import of described heat exchanger, the first outlet are respectively the import of hot limit, the outlet of hot limit, and the second import of heat exchanger, the second outlet are respectively the import of cold limit, the outlet of cold limit.
4. butadiene device for recovering tail gas according to claim 1, is characterized in that: tail gas (1) is processed in the import reception of described normal temperature separator (2), and the outlet of normal temperature separator (2) connects the import of drying device (3).
5. butadiene device for recovering tail gas according to claim 1, is characterized in that: described drying device (3) is molecular sieve drying device.
6. butadiene device for recovering tail gas according to claim 5, is characterized in that: described molecular sieve drying device comprises two molecular sieve drying tanks in parallel.
7. butadiene device for recovering tail gas according to claim 1, is characterized in that: described adsorbent equipment (8) is charcoal adsorbent equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410949.4U CN203954988U (en) | 2014-07-24 | 2014-07-24 | A kind of butadiene device for recovering tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420410949.4U CN203954988U (en) | 2014-07-24 | 2014-07-24 | A kind of butadiene device for recovering tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203954988U true CN203954988U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420410949.4U Withdrawn - After Issue CN203954988U (en) | 2014-07-24 | 2014-07-24 | A kind of butadiene device for recovering tail gas |
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| Country | Link |
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| CN (1) | CN203954988U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307301A (en) * | 2014-07-24 | 2015-01-28 | 襄阳航力机电技术发展有限公司 | A butadiene tail gas recovery device and a recovery method thereof |
| CN106861223A (en) * | 2017-02-05 | 2017-06-20 | 襄阳航力机电技术发展有限公司 | A kind of recovery toluene oxidation tail gas organic matter, the method for overbottom pressure waste heat and its device |
-
2014
- 2014-07-24 CN CN201420410949.4U patent/CN203954988U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104307301A (en) * | 2014-07-24 | 2015-01-28 | 襄阳航力机电技术发展有限公司 | A butadiene tail gas recovery device and a recovery method thereof |
| CN104307301B (en) * | 2014-07-24 | 2016-03-30 | 襄阳航力机电技术发展有限公司 | A kind of butadiene device for recovering tail gas and recovery method thereof |
| CN106861223A (en) * | 2017-02-05 | 2017-06-20 | 襄阳航力机电技术发展有限公司 | A kind of recovery toluene oxidation tail gas organic matter, the method for overbottom pressure waste heat and its device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141126 Effective date of abandoning: 20160330 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |