CN203489578U - Device for recycling methane in membrane hydrogen extraction tail gas - Google Patents
Device for recycling methane in membrane hydrogen extraction tail gas Download PDFInfo
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- CN203489578U CN203489578U CN201320519644.2U CN201320519644U CN203489578U CN 203489578 U CN203489578 U CN 203489578U CN 201320519644 U CN201320519644 U CN 201320519644U CN 203489578 U CN203489578 U CN 203489578U
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Abstract
The utility model discloses a device for recycling methane in membrane hydrogen extraction tail gas. The device comprises a purification unit, a compression unit, a liquefaction unit and a storage unit; the purification unit is used for performing operation on feed gas and conveying the purified gas to the liquefaction unit; the compression unit is used for performing pressurized cooling operation on nitrogen and conveying the low temperature gas after expansion refrigeration to the liquefaction unit; the liquefaction unit is used for receiving the feed gas from the purification unit and the low temperature gas from the compression unit, controlling the feed gas to be separated after being cooled by the low temperature gas and conveying the LNG (Liquefied Natural Gas) located at the separation position to the storage unit; the storage unit is used for performing storage recycling on the LNG which is output from the liquefaction unit. According to the device for recycling the methane in the membrane hydrogen extraction tail gas, a large amount of methane can be recycled in the membrane hydrogen extraction tail gas and accordingly the energy-saving measures of enterprises can be effectively improved, the resource consumption of the enterprises can be reduced, and the energy comprehensive utilization of the enterprises can be improved.
Description
Technical field
The utility model relates to methane recovery art field, and especially a kind of film is carried the device that reclaims methane in hydrogen tail gas.
Background technology
At present, along with improving constantly of people's living standard, for the utilization of the energy also age different from the past, so, the energy-saving and cost-reducing of the energy all advocated in a lot of areas energetically now, reduces the loss of the energy, increases the utilization ratio of the energy, the descendants that not only can better bring benefit to the mankind, has responded the guiding theory of country about sustainable development especially energetically.Investigation demonstration, the methane concentration in atmosphere has increased more than one times for many years, mainly by mankind's activity, is caused.The energy force rate carbon dioxide that methane stops heat to distribute from atmosphere is high 23 times, and therefore reducing discharge of methane and reclaiming in time methane is to solve the good approach that global warming issue can take effect in a short time.
Wherein, recycle methane as clean energy resource, can not only reduce global discharge of methane, also promote the production safety coefficients such as colliery, improve local air quality.The methane marketization is the new period mankind's a wise selection, for consolidating economic growth, promote energy security, improving environment and reduce greenhouse gas emission, is all a thing being highly profitable.In prior art, for film, carry in hydrogen tail gas and do not carry out a well recycling, the methane recovery operation of especially carrying in hydrogen tail gas for film does not have an effective way.
Utility model content
The technical problem that the utility model solves is to provide a kind of film and carries the device that reclaims methane in hydrogen tail gas; Can carry in hydrogen tail gas and reclaim a large amount of methane at film, can effectively improve the conservation measures of enterprise, reduce the resource consumption of enterprise, improve the comprehensive utilization of energy of enterprise.
For solving the problems of the technologies described above, the utility model provides a kind of film to carry the device that reclaims methane in hydrogen tail gas, it is characterized in that; Comprise clean unit, compression unit, liquefaction unit and storage element; Wherein,
Clean unit, for unstripped gas is operated, and flows to liquefaction unit by purified gas;
Compression unit, for nitrogen is carried out to supercharging cooling down operation, and is delivered to liquefaction unit by the cryogenic gas after swell refrigeration;
Liquefaction unit, for receiving from the unstripped gas of clean unit with from the cryogenic gas of compression unit; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to storage element;
Storage element, for storing the LNG of liquefaction unit output to reclaim.
Above-mentioned film is carried the device that reclaims methane in hydrogen tail gas also can have following features; Also comprise and diffuse unit; Wherein,
Diffuse unit, for carrying out high altitude discharge operation in the exhaust gas centralized of device.
Above-mentioned film is carried the device that reclaims methane in hydrogen tail gas also can have following features; Described clean unit comprises drying tower and filter;
After described unstripped gas drying tower, remove H
2o enters liquefaction unit after filter carries out dust pretreatment.
Above-mentioned film is carried the device that reclaims methane in hydrogen tail gas also can have following features; Described compression unit comprises compressor, cooler and surge tank;
Described nitrogen, after nitrogen buffer tank carries out buffer operation, enters compressor and carries out boost operations, enters cooler and carry out cooling down operation after boost operations completes, and coldly goes the cryogenic gas after operation to be delivered to liquefaction unit and to use as cold-producing medium.
Above-mentioned film is carried the device that reclaims methane in hydrogen tail gas also can have following features; Described liquefaction unit comprises heat exchanger, knockout drum and rectifying column;
Described unstripped gas carries out cooling down operation under the effect of described cryogenic gas, and entering knockout drum after cooling carries out lock out operation, and the gas of sub-department enters after rectifying column from tower top output hydrogen and nitrogen, from output LNG product at the bottom of tower and flow to storage element.
Above-mentioned film is carried the device that reclaims methane in hydrogen tail gas also can have following features; Described storage element comprises LNG holding vessel.
Above-mentioned film is carried the device that reclaims methane in hydrogen tail gas also can have following features; The described unit that diffuses comprises diffusing tower
The utility model technique scheme has following beneficial features:
The utility model is by for operating unstripped gas purified gas is flowed to the clean unit of liquefaction unit, for nitrogen being carried out to supercharging cooling down operation and being delivered to the compression unit of liquefaction unit by the cryogenic gas after swell refrigeration, for receiving from the unstripped gas of clean unit with cryogenic gas from compression unit, controlling the liquefaction unit that unstripped gas carries out lock out operation and the LNG at separated place flowed to storage element after cryogenic gas is cooling; For the LNG of liquefaction unit output is stored to the storage element reclaiming; Application the utility model can be realized effective recovery of methane, can effectively improve the conservation measures of enterprise, reduces the resource consumption of enterprise, improves the comprehensive utilization of energy of enterprise.
The application's further feature and advantage will be set forth in the following description, and, partly from description, become apparent, or understand by implementing the application.The application's object and other advantages can be realized and be obtained by specifically noted structure in description, claims and accompanying drawing.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present utility model;
Fig. 2 is compression unit schematic diagram of the present utility model.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, hereinafter will be elaborated to embodiment of the present utility model.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can be combined mutually.
The utility model provides a kind of film to carry the device that reclaims methane in hydrogen tail gas, as shown in Figure 1, comprises clean unit, compression unit, liquefaction unit and storage element; Wherein,
Clean unit, for unstripped gas is operated, and flows to liquefaction unit by purified gas; Clean unit can comprise drying tower and filter; After unstripped gas drying tower, remove H
2o enters liquefaction unit after filter carries out dust pretreatment.
In concrete operations, in the concrete enforcement of the utility model, technological process is as follows:
The utility model adopts proposes to being rich in the film of CH4 the TJSMN technological process that hydrogen tail gas is purified and developed, and adopts nitrogen expanding refrigeration liquefaction technology, low-temperature fractionating tower isolation technics to produce highly purified LNG product.
Wherein, refrigeration system adopts TJSMN single cycle refrigeration technique.The technological process of TJSMN kind of refrigeration cycle adopts nitrogen expansion refrigeration.Nitrogen is cooled to 0.8MPaG, 40 ℃ through compressor C1201 supercharging, then enters ice chest and is cooled to-140 ℃, then enters after decompressor swell refrigeration obtains-185 ℃ of cryogenic gases and returns to liquefaction ice chest, precooling unstripped gas, liquefied methane.
The main task of this unit is: from the unstripped gas of battery limit (BL), first enter molecular sieve dehydrating drying system and enter liquefaction ice chest meeting after decontamination index requires.Concrete equipment and parameter are as follows:
1) drying tower
Drying tower is mainly used to adsorb the micro-H20 in unstripped gas, prevents that H20 from stopping up plate-fin heat exchanger in low temperature process process.
Quantity: 2
Pattern: vertical
Working media: unstripped gas
Operating pressure: 3.8MPaG
Operating temperature: 35 ℃
Adsorbent pattern: 4A molecular sieve
Work period 8h
Material: Q345R
Size: φ 1000 * 3000
2) regeneration gas heater
Regeneration gas heater is used for the gas that thermal regeneration molecular sieve is used
Quantity: 1
Tube side medium: the warm steam of office
Tube side inlet temperature: press saturated vapor in 2.5MPaG
Tube side outlet temperature: condensed steam
Shell side medium: regeneration gas (rich nitrogen)
Operating pressure: 0.07MPaG
Shell side inlet temperature: 40 ℃
Outlet temperature: 240 ℃
Material: Q345R
3) piping filter
The molecular sieve dust that filter is mainly used to filter in preprocessing process enters aluminum plate-fin heat exchanger, stops up Cryo Equipment.
Quantity: 2
Pattern: vertical
Working media: unstripped gas
Operating pressure: 3.8MPaG
Operating temperature: 40 ℃
Filtering accuracy: 0.125mm
Wherein, compression unit, for nitrogen is carried out to supercharging cooling down operation, and is delivered to liquefaction unit by the cryogenic gas after swell refrigeration; As shown in Figure 2, compression unit can comprise compressor 2, cooler 3 and surge tank 1; Nitrogen, after nitrogen buffer tank carries out buffer operation, enters compressor and carries out boost operations, enters cooler and carry out cooling down operation after boost operations completes, and coldly goes the cryogenic gas after operation to be delivered to liquefaction unit and to use as cold-producing medium.
In concrete operations, refrigerant compression unit is comprised of single cycle nitrogen compressor, water cooler and nitrogen buffer tank.
Low-pressure nitrogen from ice chest heat exchanger enters nitrogen buffer tank, then enters nitrogen compressor and boosts to 0.8MPaG, then enters water cooler cooling, goes out that water cooler is laggard enters ice chest precooling, then enters expander refrigeration end.Mix refrigerant enters cold-producing medium surge tank, then enters cold-producing medium and presses
Refrigerant compression unit key equipment is that nitrogen compressor, its technical parameter are as follows:
Wherein, liquefaction unit, for receiving from the unstripped gas of clean unit with from the cryogenic gas of compression unit; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to storage element; Liquefaction unit can comprise heat exchanger, knockout drum and rectifying column; Unstripped gas carries out cooling down operation under the effect of described cryogenic gas, and entering knockout drum after cooling carries out lock out operation, and the gas of sub-department enters after rectifying column from tower top output hydrogen and nitrogen, from output LNG product at the bottom of tower and flow to storage element.
In concrete operations, the liquefaction ice chest of this unit is comprised of equipment such as plate-fin heat exchanger, rectifying column, knockout drums.Unstripped gas is cooled to-160 ℃ in ice chest, and throttling flash separation goes out the laggard low-temperature fractionating tower T1301 of entering of gas.Tower top is isolated all hydrogen and nitrogen, from the LNG product of producing at the bottom of tower.
Wherein, the technical parameter of liquefaction ice chest is as follows:
Wherein, storage element, for storing the LNG of liquefaction unit output to reclaim; Storage element can comprise LNG holding vessel.
In concrete operations, this unit adopts LNG primary and secondary tank stores with pressure, and tank volume is 300m
3, can 0 meet the storage of 4 days full load LNG products.The parameter of LNG storage tank is as described below:
LNG storage tank
Quantity: 1
Pattern: vertical
Working media: LNG
Operating pressure: 0.3MPaG
Operating temperature :-160 ℃
Design pressure: 0.5MPaG
Design temperature :-196 ℃
Preferably, in the utility model embodiment, also comprise and diffuse unit; Wherein, diffuse unit, for carrying out high altitude discharge operation in the exhaust gas centralized of device; Diffuse unit and can comprise diffusing tower.Waste gas cloud diffusing tower from the safety valve discharge in liquefaction system is concentrated high altitude discharge, and the design parameter of its diffusing tower is as follows:
1) diffuse medium: normal-temperature natural-gas
2) designing and arranging high-volume: 6000m3/h
3) exhaust stack inlet pressure: 6-12kPa
4) steam pressure: 0.2-0.4MPa
5) caliber interface: DN50
6) Power Level: AC220V 50Hz
7) diffuse height :～40m
8) earthquake intensity: 7 degree
The final LNG parameter that the utility model finally makes is as follows:
Film is carried refine and reclaim CH4 in hydrogen tail gas
CH4 purity in LNG: >=98% (V/V)
LNG flow: 1313.9Nm3/h
LNG temperature :-160 ℃
LNG pressure: 0.2MPaA
Application the utility model can be carried in hydrogen tail gas and reclaim a large amount of methane at film, can effectively improve the conservation measures of enterprise, reduces the resource consumption of enterprise, improves the comprehensive utilization of energy of enterprise.
Although the disclosed embodiment of the utility model as above, the embodiment that described content just adopts for the ease of understanding the utility model, not in order to limit the utility model.Technical staff under any the utility model in technical field; do not departing under the prerequisite of the disclosed spirit and scope of the utility model; can do any modification and variation what implement in form and in details; but scope of patent protection of the present utility model, still must be as the criterion with the scope that appending claims was defined.
Claims (6)
1. film is carried a device that reclaims methane in hydrogen tail gas, it is characterized in that; Comprise clean unit, compression unit, liquefaction unit and storage element; Wherein,
Clean unit, for unstripped gas is operated, and flows to liquefaction unit by purified gas;
Compression unit, for nitrogen is carried out to supercharging cooling down operation, and is delivered to liquefaction unit by the cryogenic gas after swell refrigeration;
Liquefaction unit, for receiving from the unstripped gas of clean unit with from the cryogenic gas of compression unit; Control unstripped gas and after cryogenic gas is cooling, carry out lock out operation, and the LNG of separation place is flowed to storage element;
Storage element, for storing the LNG of liquefaction unit output to reclaim.
2. film according to claim 1 is carried the device that reclaims methane in hydrogen tail gas, it is characterized in that; Described clean unit comprises drying tower and filter;
After described unstripped gas drying tower, remove H20, after filter carries out dust pretreatment, enter liquefaction unit.
3. film according to claim 1 is carried the device that reclaims methane in hydrogen tail gas, it is characterized in that; Described compression unit comprises compressor, cooler and surge tank;
Described nitrogen, after nitrogen buffer tank carries out buffer operation, enters compressor and carries out boost operations, enters cooler and carry out cooling down operation after boost operations completes, and coldly goes the cryogenic gas after operation to be delivered to liquefaction unit and to use as cold-producing medium.
4. film according to claim 1 is carried the device that reclaims methane in hydrogen tail gas, it is characterized in that; Described liquefaction unit comprises heat exchanger, knockout drum and rectifying column;
Described unstripped gas carries out cooling down operation under the effect of described cryogenic gas, and entering knockout drum after cooling carries out lock out operation, and the gas of sub-department enters after rectifying column from tower top output hydrogen and nitrogen, from output LNG product at the bottom of tower and flow to storage element.
5. film according to claim 1 is carried the device that reclaims methane in hydrogen tail gas, it is characterized in that; Described storage element comprises LNG holding vessel.
6. film according to claim 2 is carried the device that reclaims methane in hydrogen tail gas, it is characterized in that; Also comprise and diffuse unit;
The described unit that diffuses, for carrying out high altitude discharge operation in the exhaust gas centralized of device;
The described unit that diffuses comprises diffusing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320519644.2U CN203489578U (en) | 2013-08-25 | 2013-08-25 | Device for recycling methane in membrane hydrogen extraction tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320519644.2U CN203489578U (en) | 2013-08-25 | 2013-08-25 | Device for recycling methane in membrane hydrogen extraction tail gas |
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| Publication Number | Publication Date |
|---|---|
| CN203489578U true CN203489578U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320519644.2U Expired - Fee Related CN203489578U (en) | 2013-08-25 | 2013-08-25 | Device for recycling methane in membrane hydrogen extraction tail gas |
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| CN (1) | CN203489578U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266963A (en) * | 2018-01-16 | 2018-07-10 | 中科睿凌江苏低温设备有限公司 | A kind of tail gas recycle prepares the device of liquefied natural gas |
| CN112295373A (en) * | 2019-08-02 | 2021-02-02 | 陈刚 | Gas separation system of integrated design |
-
2013
- 2013-08-25 CN CN201320519644.2U patent/CN203489578U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266963A (en) * | 2018-01-16 | 2018-07-10 | 中科睿凌江苏低温设备有限公司 | A kind of tail gas recycle prepares the device of liquefied natural gas |
| CN112295373A (en) * | 2019-08-02 | 2021-02-02 | 陈刚 | Gas separation system of integrated design |
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|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20140319 Termination date: 20190825 |