CN205205089U - High concentration coal bed gas system CNG device - Google Patents
High concentration coal bed gas system CNG device Download PDFInfo
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- CN205205089U CN205205089U CN201520937533.2U CN201520937533U CN205205089U CN 205205089 U CN205205089 U CN 205205089U CN 201520937533 U CN201520937533 U CN 201520937533U CN 205205089 U CN205205089 U CN 205205089U
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Abstract
The utility model provides a high concentration coal bed gas system CNG device, includes dust collector, gas holder, reciprocating compressor, its characterized in that: dust collector's export links to each other with helical -lobe compressor's import, and this helical -lobe compressor is driven by inverter motor, and this inverter motor links to each other with PLC, helical -lobe compressor's export links to each other with dewatering device's import, and this dewatering device export is passed through the gas holder with the import of reciprocating compressor links to each other, the utility model has the advantages that area is little, with low costs and can guarantee the device steady operation.
Description
Technical field
The utility model relates to shallow-layer high density coal-seam gas evaluation and exploration technology field; Be specifically related to a kind of high density coal-seam gas through purification compression CNG processed (compressed natural gas) technical field.
Background technology
China's coal bed gas resource enriches.Evaluate achievement according to Ministry of Land and Resources new round National Oil Gas Resources, 2000 meters, China is 36.81 tcms with shallow Coal bed gas project, rank the world first three.
The exploitation of shallow-layer coal-seam gas needs, by technology such as drilling well, pressure break, mining, surface gathering and transferrings, extraction coal-seam gas out slightly to be made purifying treatment and can be directly used in civilian.But civilian demand is limited, is unsuitable for scale operation; When extensive gas production, need do further processing, the most economical processing mode of high density coal-seam gas makes CNG (compressed natural gas) exactly, and CNG can give refueling, also can be used as industrial raw material.
High density coal-seam gas CNG need configure reciprocating compressor and coal-seam gas is compressed to 20 ~ 25MPa.The range of pressure fluctuations of coal-seam gas well head is larger.Due to, reciprocating compressor requires higher to intake pressure, must ensure that intake pressure is in metastable state; Therefore, reciprocating compressor directly can not carry out extraction to coal bed gas well.Present modal solution is exactly configure a large gas holder before reciprocating compressor, when coal-seam gas boosts to certain value in large gas holder, starts reciprocating compressor and compresses, and stops compression when large gas holder is depressurized to certain value (about 0.08MPa).
Although adopt large gas holder to solve the problem of intake pressure instability; But large gas holder floor space is comparatively large, and cost is higher.
Utility model content
Technical problem to be solved in the utility model is the situation for prior art, provides that a kind of floor space is little, cost is low, can ensure the high density coal-seam gas CNG device that reciprocating compressor intake pressure is stable.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of high density coal-seam gas CNG device, comprise cleaning apparatus, gas-holder, reciprocating compressor, it is characterized in that: the outlet of described cleaning apparatus is connected with the import of spiral-lobe compressor, this spiral-lobe compressor is driven by variable-frequency motor, and this variable-frequency motor is connected with PLC; The outlet of described spiral-lobe compressor is connected with the import of dewatering unit, and the outlet of this dewatering unit is connected by the import of described gas-holder with described reciprocating compressor.
Arrange pneumatic adjusting valve between the import of described spiral-lobe compressor and outlet, this pneumatic adjusting valve is connected with PLC.PLC can regulate the aperture of pneumatic adjusting valve to control the quantity of reflux of coal-seam gas.
The ingress of described spiral-lobe compressor arranges intake pressure transmitter, and this intake pressure transmitter is connected with described PLC.Intake pressure transmitter sends the air inlet pressure force value detected to PLC, when intake pressure is lower than certain value, sends instruction stop complete assembly running by PLC.
The exit of described spiral-lobe compressor arranges exhaust pressure transmitter, and this exhaust pressure transmitter is connected with described PLC; This PLC regulates the aperture of described pneumatic adjusting valve according to the height of described exhaust pressure transmitter measured value.
The front end of described cleaning apparatus arranges emergency cutting off valve, and this emergency cutting off valve is connected with described PLC.In case of emergency, PLC closes emergency cutting off valve and cuts off coal-seam gas access to plant, and Accident prevention occurs.
The outlet of described reciprocating compressor is connected with sequential control dish.
Described sequential control dish has several to export.The outlet of sequential control dish can as required with bomb group, filling machine, fill post etc. and be connected.
The utility model adopts band variable-frequency motor spiral-lobe compressor and reciprocating compressor interlock CNG processed, before reciprocating compressor, adopt inverter screw compressor can ensure the stable of reciprocating compressor intake pressure well, and greatly can reduce floor space, reduce cost of investment.
Accompanying drawing explanation
Fig. 1 is system diagram of the present utility model;
Embodiment
Below in conjunction with accompanying drawing embodiment, the utility model is described in further detail.
Fig. 1 shows an embodiment of the present utility model, it comprises cleaning apparatus 2, gas-holder 6, reciprocating compressor 7, and the outlet of cleaning apparatus 2 is connected with the import of spiral-lobe compressor 3, and this spiral-lobe compressor 3 is driven by variable-frequency motor 4, this variable-frequency motor 4 is connected with PLC9, and its rotating speed is controlled by PLC.PLC can carry out the exhaust pressure of adjusting screw(rod) compressor by the load controlling variable-frequency motor.The outlet of spiral-lobe compressor 3 is connected with the import of dewatering unit 5.
Dewatering unit 5 is exported and is connected by the import of gas-holder 6 with reciprocating compressor 7.The effect that one gas-holder has steady pressure is set before reciprocating compressor.The outlet of reciprocating compressor 7 is connected with sequential control dish 8.This sequential control dish 8 has several to export, can as required with bomb group, filling machine, fill post etc. and be connected.
The solid particulates such as cleaning apparatus removing dust are entered after gas well high density coal-seam gas (methane concentration more than 90%) out gathers, high density coal-seam gas enters spiral-lobe compressor and carries out supercharging after dedusting, enter dewatering unit after supercharging to dewater, this dewatering unit drying effect can reach dew points at normal pressure less than-70 DEG C.After dehydration, high density coal-seam gas enters reciprocating compressor by gas-holder and is compressed to 20 ~ 25MPa and makes CNG, and is distributed by sequential control dish.
Arrange pneumatic adjusting valve 12 between the import of spiral-lobe compressor 3 and outlet, this pneumatic adjusting valve 12 is connected with PLC9.PLC is according to the aperture regulating pneumatic adjusting valve according to practical situation.
The ingress of spiral-lobe compressor 3 arranges intake pressure transmitter 10, and this intake pressure transmitter 10 is connected with PLC9.Intake pressure transmitter sends the pressure of spiral-lobe compressor import to PLC, and when intake pressure is lower than certain value, spiral-lobe compressor is out of service, and closes reciprocating compressor.
The exit of spiral-lobe compressor 3 arranges exhaust pressure transmitter 11, and this exhaust pressure transmitter 11 is connected with PLC9.The pressure of screw compressor exit is sent to PLC by exhaust pressure transmitter, and PLC regulates the aperture of variable valve according to the height of spiral-lobe compressor exhaust pressure.
The front end of cleaning apparatus 2 arranges emergency cutting off valve 1, and this emergency cutting off valve 1 is connected with PLC.When device breaks down, close emergency cutting off valve by PLC, prevent security incident from occurring.
The utility model adopts band variable-frequency motor spiral-lobe compressor and reciprocating compressor interlock to carry out CNG processed, and spiral-lobe compressor adopts variable-frequency motor can well control the stable of exhaust pressure; When variable-frequency motor cannot stablize exhaust pressure, can also by the effect regulating the quantity of reflux of pneumatic adjusting valve to reach stable exhaust pressure; Therefore, adopt screw compression function well to stablize reciprocating compressor intake pressure before reciprocating compressor, and greatly reduce floor space, cost of reducing investment outlay.
Claims (7)
1. a high density coal-seam gas CNG device, comprise cleaning apparatus (2), gas-holder (6), reciprocating compressor (7), it is characterized in that: the outlet of described cleaning apparatus (2) is connected with the import of spiral-lobe compressor (3), this spiral-lobe compressor (3) is driven by variable-frequency motor (4), and this variable-frequency motor (4) is connected with PLC (9); The outlet of described spiral-lobe compressor (3) is connected with the import of dewatering unit (5), and this dewatering unit (5) outlet is connected by the import of described gas-holder (6) with described reciprocating compressor (7).
2. high density coal-seam gas CNG device according to claim 1, it is characterized in that: arrange pneumatic adjusting valve (12) between the import of described spiral-lobe compressor (3) and outlet, this pneumatic adjusting valve (12) is connected with PLC (9).
3. high density coal-seam gas CNG device according to claim 2, it is characterized in that: the ingress of described spiral-lobe compressor (3) arranges intake pressure transmitter (10), this intake pressure transmitter (10) is connected with described PLC (9).
4. high density coal-seam gas CNG device according to claim 2, it is characterized in that: the exit of described spiral-lobe compressor (3) arranges exhaust pressure transmitter (11), this exhaust pressure transmitter (11) is connected with described PLC (9); This PLC (9) regulates the aperture of described pneumatic adjusting valve (12) according to the height of described exhaust pressure transmitter (11) measured value.
5. high density coal-seam gas CNG device according to claim 2, it is characterized in that: the front end of described cleaning apparatus (2) arranges emergency cutting off valve (1), and this emergency cutting off valve (1) is connected with described PLC (9).
6. according to high density coal-seam gas CNG device according to claim 2, it is characterized in that: the outlet of described reciprocating compressor (7) is connected with sequential control dish (8).
7. according to high density coal-seam gas CNG device according to claim 6, it is characterized in that: described sequential control dish (8) has several to export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937533.2U CN205205089U (en) | 2015-11-17 | 2015-11-17 | High concentration coal bed gas system CNG device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520937533.2U CN205205089U (en) | 2015-11-17 | 2015-11-17 | High concentration coal bed gas system CNG device |
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| Publication Number | Publication Date |
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| CN205205089U true CN205205089U (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520937533.2U Active CN205205089U (en) | 2015-11-17 | 2015-11-17 | High concentration coal bed gas system CNG device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349196A (en) * | 2015-11-17 | 2016-02-24 | 宁波鲍斯能源装备股份有限公司 | High density coal seam CNG preparation device |
| CN115467830A (en) * | 2022-09-19 | 2022-12-13 | 上海齐耀螺杆机械有限公司 | Gas quantity adjusting device and method for two-stage screw compressor |
-
2015
- 2015-11-17 CN CN201520937533.2U patent/CN205205089U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105349196A (en) * | 2015-11-17 | 2016-02-24 | 宁波鲍斯能源装备股份有限公司 | High density coal seam CNG preparation device |
| CN115467830A (en) * | 2022-09-19 | 2022-12-13 | 上海齐耀螺杆机械有限公司 | Gas quantity adjusting device and method for two-stage screw compressor |
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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 |