CN204779510U - Coke oven gas synthetic natural gas device - Google Patents
Coke oven gas synthetic natural gas device Download PDFInfo
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- CN204779510U CN204779510U CN201520506533.7U CN201520506533U CN204779510U CN 204779510 U CN204779510 U CN 204779510U CN 201520506533 U CN201520506533 U CN 201520506533U CN 204779510 U CN204779510 U CN 204779510U
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- gas
- liquid
- evaporimeter
- natural gas
- storage tank
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Abstract
The utility model relates to a coke oven gas synthetic natural gas device, adding hydrogen tank, desulfurizing tower, super smart clarifier, methanator, desicator and membrane separator including what the order was connected, addding liquid CO2 storage tank and evaporimeter, connect the force (forcing) pump between the exit end of liquid CO2 storage tank and the entry end of evaporimeter, the exit end connection of evaporimeter is with hydrogen tank. Liquid CO2 in the liquid CO2 storage tank passes through the force (forcing) pump and gets into the evaporimeter gasification, replenishes gaseous state CO2 to purifying the hydrogen tank that adds that the process adds from the evaporimeter exit end, gets into the methanation process after hydro -conversion, smart desulfurization, super smart purifications, with CO2 and H2 reaction formation CH4, obtains the product natural gas after process drying, the membrane separation. The utility model provides a coke oven gas synthetic natural gas device, through to adding CO2 in the production system, suitable hydrocarbon proportion is controlled to the rich hydrogen tail gas of make full use of to improve the gas production, reduced the output of rich hydrogen tail gas.
Description
Technical field
The utility model relates to synthesizing natural gas from coke oven gas device.
Background technology
China is first coke production big country in the world, except coke oven melt down that heating is personal and civilian, generating, except production synthetic ammonia or methyl alcohol, the coke-oven gas diffused every year about 5,000,000,000 Nm
3.Coke-oven gas burns or directly discharges, and has both caused the huge wasting of resources, has caused again serious environmental pollution.For effectively improving the ecological environment, existing coke(oven)gas produces synthetic ammonia, methyl alcohol production capacity is seriously superfluous, development coke-oven gas post-treatment project, imperative.Coke-oven gas synthetic natural gas project is arisen at the historic moment in this context.Coke-oven gas synthetic natural gas technology, technical process is: after coke-oven gas removes benzene, naphthalene, sulfide by purification, more compressed, heat exchange, carries out methanation reaction, by CO, CO under methanation catalyst effect
2with H
2change into the main gas mixture containing methane, hydrogen, nitrogen, then adopt gas separation that the Hydrogen Separation in gas mixture is obtained the synthetic natural gas of methane concentration more than 94% (SNG).Coke-oven gas synthetic natural gas utilizes CO in coke-oven gas
2, CO and H
2reaction generates CH
4, in coke-oven gas, the height of carbon content directly affects the output of synthetic natural gas.
At present, the problem of ubiquity hydrogen surplus in coke-oven gas synthetic natural gas process.Such as, in the unstripped gas of Shanxi shale gas company limited coke-oven gas synthesis of natural device of air (CO+CO
2) about about 9%, lower than design load, H
2with (CO+CO
2) ratio be 56.5:(6.3+2.2)=6.6, by Theoretical Calculation (H
2-CO
2): (CO+CO
2) ≈ 3.5, H
2surplus, make per hourly in methanation reaction can produce a large amount of hydrogen rich off gas, because calorific value is lower, this part gas is sent to coke-oven plant and makes fuel, causes the waste of resource.
Therefore, need one to make full use of hydrogen rich off gas, the minimizing wasting of resources, improve the device of gas production.
Summary of the invention
The technical problems to be solved in the utility model is to provide one can make full use of hydrogen rich off gas, improves the synthesizing natural gas from coke oven gas device of gas production.
For solving above technical problem, the technical solution adopted in the utility model is:
A kind of synthesizing natural gas from coke oven gas device, comprises the hydrogenation tank, thionizer, superfinishing cleaner, methanator, moisture eliminator and the membrane separation apparatus that are linked in sequence, sets up liquid CO
2storage tank and vaporizer, liquid CO
2connect force (forcing) pump between the exit end of storage tank and the inlet end of vaporizer, the exit end of vaporizer connects hydrogenation tank.
Liquid CO
2liquid CO in storage tank
2enter vaporizer gasification by force (forcing) pump, the hydrogenation tank added from evaporator outlet end to cleaning section supplements gaseous state CO
2, after hydrocracking, fine de-sulfur, superfinishing purification, enter methanation operation, by CO
2with H
2reaction generates CH
4, after super-dry, membrane sepn, obtain product Sweet natural gas.
The synthesizing natural gas from coke oven gas device that the utility model provides, by adding CO in production system
2, make full use of hydrogen rich off gas, control suitable carbon ratio, thus improve gas production, decrease the output of hydrogen rich off gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model synthesizing natural gas from coke oven gas device.
In figure, 1-hydrogenation tank, 2-thionizer, 3-superfinishing cleaner, 4-methanator, 5-moisture eliminator, 6-membrane separation apparatus, the liquid CO of 7-
2storage tank, 8-vaporizer, 9-force (forcing) pump.
Embodiment
In order to make those skilled in the art better understand the utility model, below in conjunction with accompanying drawing, explanation clear, complete is further done to the utility model.
Synthesizing natural gas from coke oven gas device shown in Fig. 1, comprises the hydrogenation tank 1, thionizer 2, superfinishing cleaner 3, methanator 4, moisture eliminator 5 and the membrane separation apparatus 6 that are linked in sequence.On this basis, liquid CO is set up
2storage tank 7 and vaporizer 8, liquid CO
2connect force (forcing) pump 9 between the exit end of storage tank 7 and the inlet end of vaporizer 8, the exit end of vaporizer 8 connects hydrogenation tank 1.
Liquid CO
2entering vaporizer 8 by force (forcing) pump 9 to gasify, exporting by entering hydrogenation tank after governor valve control pressure, flow from vaporizer 8, after hydrocracking, ZnO fine de-sulfur, superfinishing purification, enter methanation operation, by CO
2with H
2reaction generates CH
4, after super-dry, membrane sepn, obtain product Sweet natural gas.
According to the requirement (CO+CO of methanation catalyst
2≤ 12%), in coke-oven gas, CO is added
2, the total carbon making coke-oven gas enter SNG system brings up to 12% by about 9%, improves about 3%.By production equipment 25000Nm at full capacity
3/ h production calculation, benefit CO per hour
2500Nm
3, 500Nm
3cO
2with H
2complete reaction can produce 500Nm
3sweet natural gas.
Mend CO
2profit analysis: daily mend CO
212000Nm
3, amount to liquid CO
224 tons.Liquid CO
2price 580 yuan/ton, average daily liquid CO
2cost 24 × 580=13920 unit, year cost 5,000,000 yuan.Recyclable CH after membrane sepn
490%, average daily voluminous Sweet natural gas 500 × 90% × 24=10800Nm
3.Current pipe natural gas price 2.25 yuan/Nm
3, average daily natural gas sales increases by 10800 × 2.25=24300 unit, and year sells increase by 8,000,000 yuan.During normal production, before pre-hydrogenation, electric heater (800KW) need leave 30% power, and before methanation second stage reactor, electric heater (800KW) need leave 20% power to ensure processing requirement.CO
2with H
2reaction generates CH
4reaction be thermopositive reaction, add CO
2after, system response is heat gain, and before pre-hydrogenation, before electric heater and methanation second stage reactor, electric heater can be stopped using.Save power consumption: (800 × 30%)+(800 × 20%)=400KW, power cost saving 400 × 0.6=240 unit, year power cost saving 1,900,000 yuan.Therefore, CO is mended
2annual return is about: 800+190-500=490 ten thousand yuan.
The claimed scope of the utility model is not limited to above embodiment; to those skilled in the art; the utility model can have various deformation and change, all in design of the present utility model and any amendment, the improvement done within principle be equal to replacement and all should be included within protection domain of the present utility model.
Claims (1)
1. a synthesizing natural gas from coke oven gas device, comprises the hydrogenation tank (1), thionizer (2), superfinishing cleaner (3), methanator (4), moisture eliminator (5) and the membrane separation apparatus (6) that are linked in sequence, it is characterized in that: set up liquid CO
2storage tank (7) and vaporizer (8), liquid CO
2connect force (forcing) pump (9) between the exit end of storage tank (7) and the inlet end of vaporizer (8), the exit end of vaporizer (8) connects hydrogenation tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520506533.7U CN204779510U (en) | 2015-07-14 | 2015-07-14 | Coke oven gas synthetic natural gas device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520506533.7U CN204779510U (en) | 2015-07-14 | 2015-07-14 | Coke oven gas synthetic natural gas device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204779510U true CN204779510U (en) | 2015-11-18 |
Family
ID=54519601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520506533.7U Expired - Fee Related CN204779510U (en) | 2015-07-14 | 2015-07-14 | Coke oven gas synthetic natural gas device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204779510U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105647607A (en) * | 2016-01-22 | 2016-06-08 | 新地能源工程技术有限公司 | Method and device for producing natural gas through low-carbon-hydrogen-ratio semi-coke tail gas |
-
2015
- 2015-07-14 CN CN201520506533.7U patent/CN204779510U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105647607A (en) * | 2016-01-22 | 2016-06-08 | 新地能源工程技术有限公司 | Method and device for producing natural gas through low-carbon-hydrogen-ratio semi-coke tail gas |
| CN105647607B (en) * | 2016-01-22 | 2018-04-03 | 新地能源工程技术有限公司 | A kind of method and device of low hydrogen-carbon ratio tail of semi coke production 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 |
Granted publication date: 20151118 Termination date: 20170714 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |