CN205099636U - Low concentration coal bed gas concentration unit - Google Patents
Low concentration coal bed gas concentration unit Download PDFInfo
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- CN205099636U CN205099636U CN201520796606.0U CN201520796606U CN205099636U CN 205099636 U CN205099636 U CN 205099636U CN 201520796606 U CN201520796606 U CN 201520796606U CN 205099636 U CN205099636 U CN 205099636U
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Abstract
The utility model provides a low concentration coal bed gas concentration unit, includes dust collector, this dust collector passes through the feed gas pipeline and links to each other with methane gas adsorption equipment, methane gas adsorption equipment is established ties by a plurality of methane adsorption tanks and forms, methane adsorption tanks bottom sets up the analytic trachea way of one -level atmospheric analysis trachea way and one -level vacuum, one -level atmospheric analysis trachea say with the analytic trachea way in one -level vacuum joins to a back continuously with oxygen nitrogen adsorption equipment through the analytic trachea way of one -level, oxygen nitrogen adsorption equipment is established ties by a plurality of oxygen nitrogen adsorption jars and forms its characterized in that: methane gas adsorption equipment front end sets up one -level supercharging device, oxygen nitrogen adsorption equipment front end sets up split -compressor, the utility model has the advantages that application scope is wide, and availability of methane is high, and the device security is high.
Description
Technical field
The utility model relates to low concentration coal-bed gas concentrate technical field; Be specifically related to a kind of device utilizing pressure swing adsorption extracting low-concentration coal-seam gas.
Background technology
Coal-seam gas is commonly called as coal mine gas, and its main component is methane.It is not only a kind of clean energy of preciousness, is also a kind of important industrial chemicals.China's coal-seam gas rich reserves, " 2014-2019 Coalbed Methane In China industry market is analyzed and Investment Trend research report " of issuing according to China's Industry research report net shows, and the total geological resource reserves of China's coal-seam gas are 3.68 × 10
13m
3, be the third-largest reserves state after Russia, Canada in the world.But, China's coal mine gas utilization ratio is not high.For 2012, methane output 126.02 billion cubic meter, utilization ratio was only 41.72%.
The methane concentration of China's overwhelming majority coal-seam gas is lower than 50%; This part coal-seam gas is very big on Safety of Coal Mine Production impact, and oxygen level is high, is difficult to direct utilization, and major part is all be not utilized to discharge sky with regard to direct.Not only waste energy, methane is a kind of greenhouse gases, but also causes serious environmental problems.
Chinese invention patent ZL200610028178.2 discloses " a kind of two stage low pressure method coal bed gas producing natural gas method ".The coal-seam gas of less than 10% methane concentration is being passed through more than two sections of pressure-changed adsorption concentratings to 95% close to normal pressure (below 0.05MPa) by this patent of invention.Two sections of pressure-variable adsorptions are two sections of CH
4aspiration attached concentrate workshop section series circulation forms.This technique by more than low concentration coal-bed gas concentrate to 95%, and can improve methane utilization ratio.But this technique is adsorbing coal-seam gas close under normal pressure, complete assembly huge structure, floor space is wide, is not suitable for the coal-seam gas concentrate of atm number; And the coal-seam gas of 10% methane concentration is just in time between blast area, can not ensure the safe operation of this technique.
Utility model content
Technical problem to be solved in the utility model is the situation for prior art, provides a kind of and is applicable to atm number and the good low concentration coal-bed gas concentration unit of security.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of low concentration coal-bed gas concentration unit, comprise cleaning apparatus, this cleaning apparatus is connected with methane gas adsorption unit by unstripped gas pipeline, described methane gas adsorption unit is in series by multiple methane adsorption tank, described methane adsorption pot bottom arranges one-level normal pressure resolution gas pipeline and one-level vacuum analysis feed channel, be connected with oxygen N2 adsorption device by one-level resolution gas pipeline after described one-level normal pressure resolution gas pipeline converges to a place with described one-level vacuum analysis feed channel, described oxygen N2 adsorption device is in series by multiple oxygen N2 adsorption tank, it is characterized in that: before described methane gas adsorption unit, one-level supercharging device is set, before described oxygen N2 adsorption device, two stage compressor is set.
The utility model arranges one-level supercharging device and two stage compressor respectively before methane gas adsorption unit, oxygen N2 adsorption device, greatly can reduce the volume of methane gas adsorption unit, oxygen N2 adsorption device, be not only applicable to the gas well of stingy amount, and be applicable to the gas well of atm number, enrich range of application.
In order to ensure that the coal-seam gas entering adsorption unit is dry, without oil, extend the work-ing life of sorbent material.Unstripped gas pipeline between described one-level supercharging device and described methane gas adsorption unit sets gradually one-level dewatering unit and one-level oil removal plant; One-level resolution gas pipeline between described two stage compressor and described oxygen N2 adsorption device sets gradually secondary dewatering unit and secondary oil removal plant.
Methane gas adsorption unit is in series by 2 ~ 4 methane adsorption tanks, and described oxygen N2 adsorption device is in series by 2 ~ 4 oxygen N2 adsorption tanks.Each adsorption tanks carry out adsorbing successively, step-down, displacement, boosting the above-mentioned steps that constantly circulates.
Described methane adsorption tank top is provided with exhaust emission pipe.
The bottom of described oxygen N2 adsorption tank arranges secondary atmospheric resolution gas pipeline and secondary vacuum resolution gas pipeline, and described secondary atmospheric resolution gas pipeline is connected with the import of described one-level supercharging device with behind described secondary vacuum resolution gas ducts converge to place.Secondary resolution gas is back to the recycle of one-level supercharging device, can significantly improve the utilization ratio of methane.
Described one-level vacuum analysis feed channel is provided with one-level vacuum pump, described secondary vacuum resolution gas pipeline is provided with two-stage vacuum pump.Vacuum pump is used to the adsorbent gas of vacuum analysis.
Described oxygen N2 adsorption tank top arranges finished product feed channel.
Described unstripped gas pipeline, described one-level normal pressure resolution gas pipeline, described one-level vacuum analysis feed channel, described exhaust emission pipe, described one-level resolution gas pipeline, described secondary atmospheric resolution gas pipeline, described secondary vacuum resolution gas pipeline, described finished product feed channel are provided with sequencing valve, and the opening and closing of this sequencing valve is controlled by PLC.
The import of described cleaning apparatus is connected with coal-seam gas source of the gas by water seal fire arrestor, exports and is connected with described one-level supercharging device by dry spark arrester.Before and after cleaning apparatus, spark arrester is set, can the safe operation of protector, and dangerous item station in minimum extent.
Accompanying drawing explanation
Fig. 1 is structure iron of the present utility model;
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
Fig. 1 illustrates an embodiment of the present utility model, and it comprises cleaning apparatus 3, and this cleaning apparatus 3 is connected with methane gas adsorption unit 8 by unstripped gas pipeline 10.
The import of cleaning apparatus 3 is connected with coal-seam gas source of the gas 1 by water seal fire arrestor 2.Coal-seam gas source of the gas methane concentration of the present utility model is 30% ~ 40%.The outlet of cleaning apparatus 3 is connected with one-level supercharging device 5 by dry spark arrester 4.Due in dust removal process gas flow rate too fast can produce unavoidably electrostatic occur confined explosion, spark arrester is set before and after cleaning apparatus, flame can be avoided to spread to two ends, protection complete assembly safety and the damage control in minimum extent.
One-level supercharging device can be water ring compressor, can be also centrifugal blower, the coal-seam gas of normal pressure is pressurized to 0.15 ~ 0.2MPa.
The outlet of one-level supercharging device 5 is connected with methane gas adsorption unit 8, the unstripped gas pipeline 10 between one-level supercharging device 5 and methane gas adsorption unit 8 sets gradually one-level dewatering unit 6 and one-level oil removal plant 7.Between methane gas adsorption unit, arrange dewatering unit and oil removal plant, be to remove moisture in unstripped gas and oil, ensures that the unstripped gas entering methane gas adsorption unit is that drying there is no oil, can extend the work-ing life of sorbent material in methane gas adsorption unit.
Methane gas adsorption unit 8 is in series by 2 to 4 methane adsorption tanks 9, is filled with methane adsorption sorbent material in this methane adsorption tank 9; The top of methane adsorption tank 9 is provided with exhaust emission pipe 13; Methane adsorption sorbent material can adsorbed methane and a small amount of oxygen nitrogen, is not discharged by exhaust emission pipe by the gas adsorbed.Each methane adsorption tank 9 carries out adsorbing successively, step-down, displacement, boosting the above-mentioned steps that constantly circulates.
The bottom of methane adsorption tank 9 arranges one-level normal pressure resolution gas pipeline 12 and one-level vacuum analysis feed channel 11, is connected after one-level normal pressure resolution gas pipeline 12 converges to a place with one-level vacuum analysis feed channel 11 with two stage compressor 15.One-level vacuum analysis feed channel 11 is provided with one-level vacuum pump 14.When methane adsorption tank adsorbed methane first carries out normal pressure parsing after saturated, the gas parsed flows out from one-level normal pressure resolution gas pipeline, after normal pressure is resolved, utilize one-level vacuum pump to carry out vacuum analysis further, the gas parsed flows out from one-level vacuum analysis feed channel.
After methane gas adsorption unit is purified, coal-seam gas methane concentration can be increased to 50% ~ 60%.
Unstripped gas pipeline 10, one-level normal pressure resolution gas pipeline 12, one-level vacuum analysis feed channel 11, exhaust emission pipe 13 are provided with sequencing valve, and the opening and closing of this sequencing valve is controlled by PLC.
Two stage compressor is preferably sprayed water spiral-lobe compressor, and one-level resolution gas is pressurized to 0.6 ~ 0.8MPa.The outlet of two stage compressor 15 is connected with oxygen N2 adsorption device 19 by one-level resolution gas pipeline 18, and the one-level resolution gas pipeline 18 between two stage compressor 15 and oxygen N2 adsorption device 8 sets gradually secondary dewatering unit 16 and secondary oil removal plant 17.
Oxygen N2 adsorption device 19 is in series by 2 to 4 oxygen N2 adsorption tanks 20, is filled with adsorb oxygen nitrogen absorber in oxygen N2 adsorption tank; The top of oxygen N2 adsorption tank 20 is provided with finished product feed channel 24; Adsorb oxygen nitrogen absorber energy adsorption of oxygen and nitrogen and a small amount of methane, after peroxide N2 adsorption device concentrate, high density coal-seam gas is discharged from finished product feed channel 24.After peroxide N2 adsorption device is purified, the methane concentration of coal-seam gas can reach more than 85%.
The bottom of oxygen N2 adsorption tank 20 arranges secondary atmospheric resolution gas pipeline 22 and secondary vacuum resolution gas pipeline 21, and secondary atmospheric resolution gas pipeline 22 is connected with the import of one-level supercharging device 5 after converging to a place with secondary vacuum resolution gas pipeline 21.Secondary vacuum resolution gas pipeline 21 is provided with two-stage vacuum pump 23.When first carrying out normal pressure parsing after oxygen N2 adsorption tank adsorb oxygen nitrification, the gas parsed flows out from secondary atmospheric resolution gas pipeline, after normal pressure is resolved, utilize two-stage vacuum pump to carry out vacuum analysis further, the gas parsed flows out from secondary vacuum resolution gas pipeline.
The resolution gas methane concentration that oxygen N2 adsorption device parses is 30% ~ 35%.
One-level resolution gas pipeline 18, secondary atmospheric resolution gas pipeline 22, secondary vacuum resolution gas pipeline 21, finished product feed channel 24 are provided with sequencing valve, and the opening and closing of this sequencing valve is controlled by PLC.
This device extracting and concentrating technology is roughly as follows: methane concentration be 30% ~ 40% coal-seam gas source of the gas 1 after cleaning apparatus 3 dedusting, enter one-level supercharging device 5 supercharging, the coal-seam gas of normal pressure is pressurized to 0.15 ~ 0.2MPa by this one-level supercharging device 5; Then methane gas adsorption unit 8 is entered, methane gas adsorption unit 8 is in series by 2 ~ 4 methane adsorption tanks 9, entered two stage compressor 15 by the coal-seam gas of adsorbing by one-level normal pressure parsing pipeline and one-level vacuum analysis pipeline, do not discharged by exhaust emission pipe 13 by the waste gas adsorbed; After methane gas adsorption device adsorbs concentrate, coal-seam gas methane concentration is promoted to more than 50%; The coal-seam gas that methane gas adsorption unit parses is pressurized to 0.6 ~ 0.8MPa by two stage compressor, enters oxygen N2 adsorption device 19; Oxygen N2 adsorption device 9 is in series by 2 ~ 4 oxygen N2 adsorption tanks 20, and the inside is filled with the sorbent material of adsorb oxygen nitrogen; After peroxide N2 adsorption device concentrate, high density coal-seam gas (methane concentration more than 85%) is discharged from finished product feed channel 24, the methane a small amount of by the oxygen nitrogen one-level of adsorbing resolves through secondary atmospheric parsing pipeline and secondary vacuum the import recycle that pipeline is back to one-level supercharging device, and the methane concentration of this secondary resolution gas is 30% ~ 35%.
Advantage of the present utility model is: 1, secondary absorption adopts methane adsorption device and oxygen N2 adsorption device respectively, and the resolution gas of oxygen N2 adsorption device gets back to recycle before one-level supercharging device, improves methane utilization ratio; 2, compression set is set before adsorption unit, greatly can reduces the volume of adsorption unit, not be only applicable to the gas well of stingy amount, also be applicable to the gas well of atm number, expand the scope of application; 3, coal-seam gas source of the gas of the present utility model is chosen as 30% ~ 40% between non-blast area, and arranges spark arrester before and after cleaning apparatus, the safe operation of protector, and dangerous item station in minimum extent.
Claims (9)
1. a low concentration coal-bed gas concentration unit, comprise cleaning apparatus (3), this cleaning apparatus (3) is connected with methane gas adsorption unit (8) by unstripped gas pipeline (10), described methane gas adsorption unit (8) is in series by multiple methane adsorption tank (9), described methane adsorption tank (9) bottom arranges one-level normal pressure resolution gas pipeline (12) and one-level vacuum analysis feed channel (11), described one-level normal pressure resolution gas pipeline (12) is connected with oxygen N2 adsorption device (19) by one-level resolution gas pipeline (18) after converging to a place with described one-level vacuum analysis feed channel (11), described oxygen N2 adsorption device (19) is in series by multiple oxygen N2 adsorption tank (20), it is characterized in that: described methane gas adsorption unit (8) front end arranges one-level supercharging device (5), described oxygen N2 adsorption device (19) front end arranges two stage compressor (15).
2. low concentration coal-bed gas concentration unit according to claim 1, is characterized in that: the unstripped gas pipeline (10) between described one-level supercharging device (5) and described methane gas adsorption unit (8) sets gradually one-level dewatering unit (6) and one-level oil removal plant (7); One-level resolution gas pipeline (18) between described two stage compressor (15) and described oxygen N2 adsorption device (19) sets gradually secondary dewatering unit (16) and secondary oil removal plant (17).
3. low concentration coal-bed gas concentration unit according to claim 1, it is characterized in that: methane gas adsorption unit (8) is in series by 2 ~ 4 methane adsorption tanks (9), described oxygen N2 adsorption device (19) is in series by 2 ~ 4 oxygen N2 adsorption tanks (20).
4. low concentration coal-bed gas concentration unit according to claim 3, is characterized in that: described methane adsorption tank (9) top is provided with exhaust emission pipe (13).
5. low concentration coal-bed gas concentration unit according to claim 4, it is characterized in that: the bottom of described oxygen N2 adsorption tank (20) arranges secondary atmospheric resolution gas pipeline (22) and secondary vacuum resolution gas pipeline (21), be connected with the import of described one-level supercharging device (5) after described secondary atmospheric resolution gas pipeline (22) converges to a place with described secondary vacuum resolution gas pipeline (21).
6. low concentration coal-bed gas concentration unit according to claim 5, it is characterized in that: described one-level vacuum analysis feed channel (11) is provided with one-level vacuum pump (14), described secondary vacuum resolution gas pipeline (21) is provided with two-stage vacuum pump (23).
7. low concentration coal-bed gas concentration unit according to claim 5, is characterized in that: described oxygen N2 adsorption tank (20) top arranges finished product feed channel (24).
8. low concentration coal-bed gas concentration unit according to claim 7, it is characterized in that: described unstripped gas pipeline (10), described one-level normal pressure resolution gas pipeline (12), described one-level vacuum analysis feed channel (11), described exhaust emission pipe (13), described one-level resolution gas pipeline (18), described secondary atmospheric resolution gas pipeline (22), described secondary vacuum resolution gas pipeline (21), described finished product feed channel (24) are provided with sequencing valve, and the opening and closing of this sequencing valve is controlled by PLC.
9. low concentration coal-bed gas concentration unit according to claim 1, it is characterized in that: the import of described cleaning apparatus (3) is connected with coal-seam gas source of the gas (1) by water seal fire arrestor (2), exports and is connected with described one-level supercharging device (5) by dry spark arrester (4).
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| CN201520796606.0U CN205099636U (en) | 2015-10-12 | 2015-10-12 | Low concentration coal bed gas concentration unit |
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| CN201520796606.0U CN205099636U (en) | 2015-10-12 | 2015-10-12 | Low concentration coal bed gas concentration unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199798A (en) * | 2015-10-12 | 2015-12-30 | 宁波鲍斯能源装备股份有限公司 | Low-concentration coal bed gas enriching device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105199798A (en) * | 2015-10-12 | 2015-12-30 | 宁波鲍斯能源装备股份有限公司 | Low-concentration coal bed gas enriching device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 315505 Zhejiang Province, Ningbo city Fenghua District streets Xiwu Shang Qiao Road No. 18 Patentee after: NINGBO BAOSI ENERGY EQUIPMENT Co.,Ltd. Address before: 315505 Zhejiang province Fenghua city streets Xiwu Shang Qiao Road No. 18 Patentee before: NINGBO BAOSI ENERGY EQUIPMENT Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |