CN211753696U - Coal mine ventilation air methane recovery system - Google Patents
Coal mine ventilation air methane recovery system Download PDFInfo
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- CN211753696U CN211753696U CN202020219947.2U CN202020219947U CN211753696U CN 211753696 U CN211753696 U CN 211753696U CN 202020219947 U CN202020219947 U CN 202020219947U CN 211753696 U CN211753696 U CN 211753696U
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- electromagnetic valve
- adsorption tower
- ventilation air
- gas pressure
- gas
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Abstract
The utility model discloses a colliery ventilation air methane recovery system, it includes: the ventilation air inlet pipe (5), the ventilation air inlet pipe (5) is connected with an air inlet of the booster pump (7); an air inlet of the booster pump (7) is respectively connected with air inlet ends of a first adsorption tower (11) and a second adsorption tower (12) through a first electromagnetic valve (9) and a second electromagnetic valve (10); the air outlet end of the first adsorption tower (11) is respectively connected with a main exhaust port (23) and a vacuum pump (19) through a third electromagnetic valve (16) and a fourth electromagnetic valve (17); the gas outlet end of the second adsorption tower (12) is respectively connected with a main exhaust port (23) and a vacuum pump (19) through a fifth electromagnetic valve (15) and a sixth electromagnetic valve (18); the vacuum pump (19) is connected with a gas storage tank (20); the problem of prior art do not have to implement the monitoring to the gas pressure in adsorption tower and the gas container, take place the too big dangerous condition of induction of gas pressure easily is solved.
Description
Technical Field
The utility model belongs to low concentration gas recycle field especially relates to a colliery ventilation air methane recovery system.
Background
Gas is the second only major greenhouse gas to carbon dioxide, and the greenhouse effect produced by gas per unit mass is equivalent to 21 times that of carbon dioxide of the same mass. The coal mine ventilation air methane is one of main emission sources in the gas industry, reduces the emission of the coal mine ventilation air methane, and can reduce the emission of greenhouse gases. Meanwhile, the main component of coal mine gas is methane, which is a high-quality clean gas energy source. Almost all coal mines do not attempt to recover and dispose of methane from the mine ventilation air and discharge it directly into the atmosphere, which not only results in a huge waste of resources, but also causes serious pollution to the atmospheric environment.
The existing technologies for recovering coal mine ventilation air methane mainly comprise two main types, one is to carry out oxidation combustion on the ventilation air methane, and related coal mine ventilation air methane oxidation combustion utilization devices mainly comprise CFRR catalytic combustors developed by Canadian CANMET energy technology and thermal TFRR combustors which are published in MEGTEC system by Sequa corporation in America and can be used for treating coal mine ventilation air methane, and the other is to separate methane from air in the ventilation air methane by using an adsorbent, then enrich the methane into high-concentration gas and utilize the gas. The former does not make good use of gas, and the latter is technically complex and has low utilization efficiency.
In the prior art, a coal mine ventilation air methane recovery system is disclosed, and a patent of patent No. 200920206797.5 introduces a coal mine ventilation air methane recovery method, but the prior art does not monitor the gas pressure in an adsorption tower and a gas container, so that the situation that the gas pressure is too high to induce danger easily occurs.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the coal mine ventilation air methane recovery system is simple in system and low in energy consumption, can effectively reduce the concentration of methane in ventilation air exhaust gas to achieve recovery, and avoids the situation that the danger is caused by the overlarge pressure of the methane.
The technical scheme of the utility model is that:
a coal mine ventilation air methane recovery system comprises: the ventilation air inlet pipe is connected with an air inlet of the booster pump; an air inlet of the booster pump is connected with air inlet ends of the first adsorption tower and the second adsorption tower through a first electromagnetic valve and a second electromagnetic valve respectively; the gas outlet end of the first adsorption tower is connected with the main gas outlet and the vacuum pump through a third electromagnetic valve and a fourth electromagnetic valve respectively; the gas outlet end of the second adsorption tower is connected with the main gas outlet and the vacuum pump through a fifth electromagnetic valve and a sixth electromagnetic valve respectively; the vacuum pump is connected with the gas storage tank.
A first gas pressure sensor is installed in the booster pump, a second gas pressure sensor is installed in the first adsorption tower, a third gas pressure sensor is installed in the second adsorption tower, and a fourth gas pressure sensor and a methane concentration sensor are installed in the gas storage tank; and the first gas pressure sensor, the second gas pressure sensor, the third gas pressure sensor, the fourth gas pressure sensor and the methane concentration sensor are respectively connected with the input end of the PLC.
The first adsorption tower and the second adsorption tower are arranged in parallel.
The PLC is connected with the monitoring system through an RS485 bus.
And control ends of the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the fifth electromagnetic valve and the sixth electromagnetic valve are respectively connected with the output end of the PLC.
The specific surface area of the adsorbent filled in the first adsorption tower and the second adsorption tower is more than 2000 m/g.
A drier is arranged on the ventilation air inlet pipe.
The utility model has the advantages that:
due to the adoption of the technical scheme, the beneficial effects of the utility model are that:
1) the utility model has the advantages that the two parallel adsorption towers are arranged, so that the adsorption and desorption can be alternately carried out, the efficiency of the device is improved, the methane concentration can be enriched and improved by more than 35%, the methane concentration of ventilation air methane is effectively reduced, and the energy conservation and emission reduction are realized;
2) the utility model is provided with a first gas pressure sensor in the booster pump, a second gas pressure sensor in the first adsorption tower, a third gas pressure sensor in the second adsorption tower, a fourth gas pressure sensor and a methane concentration sensor in the gas storage tank; the gas pressure is monitored in real time, and control is performed, so that the condition that danger is caused by overlarge gas pressure is avoided;
3) whether the adsorption process is sufficient can be judged according to a gas pressure sensor in the adsorption tower in the recovery process, and the vacuum pump is opened to extract the attached methane after the methane is absorbed and saturated, so that the whole recovery process is more effective.
The problem that the gas pressure in an adsorption tower and a gas container is not monitored in the prior art, and danger is easily caused by overlarge gas pressure is solved; the system is simple, consumes few energy, can effectively reduce the methane concentration in the ventilation air methane waste gas and realize the recovery, avoids taking place the too big dangerous condition that induces of gas pressure.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The specific implementation mode is as follows:
the invention will be described in further detail with reference to the following drawings and detailed description:
referring to fig. 1, a coal mine ventilation air methane recovery system, the system has the coal mine ventilation air methane recovery system of this embodiment, including monitored control system 1, monitored control system 1 includes PC and configuration king monitoring software 2, PLC controller 4, and PLC controller and monitored control system 1 pass through RS485 bus 3 and are connected. The PLC controller can be Siemens S7200 or S7300 series PLC controller. The configuration king can select Siemens WinCC V7.3 monitoring configuration software;
the ventilation air inlet pipe 5 is connected with an air inlet of a booster pump 7; an air inlet of the booster pump 7 is respectively connected with air inlet ends of a first adsorption tower 11 and a second adsorption tower 12 through a first electromagnetic valve 9 and a second electromagnetic valve 10; the gas outlet end of the first adsorption tower 11 is respectively connected with a main gas outlet 23 and a vacuum pump 19 through a third electromagnetic valve 16 and a fourth electromagnetic valve 17; the gas outlet end of the second adsorption tower 12 is connected with a main exhaust port 23 and a vacuum pump 19 through a fifth electromagnetic valve 15 and a sixth electromagnetic valve 18 respectively; the vacuum pump 19 is connected with a gas storage tank 20; the adsorbed exhaust gas is discharged to the atmosphere through the main exhaust port 23.
A first gas pressure sensor 8 is installed in the booster pump 7, a second gas pressure sensor 13 is installed in the first adsorption tower 11, a third gas pressure sensor 14 is installed in the second adsorption tower 12, and a fourth gas pressure sensor 21 and a methane concentration sensor 22 are installed in the gas storage tank 20; the first gas pressure sensor 8, the second gas pressure sensor 13, the third gas pressure sensor 14, the fourth gas pressure sensor 21 and the methane concentration sensor 22 are respectively connected with the input end of the PLC controller 4. The gas pressure sensor is JC316 gas pressure sensor of Beijing Jingbo Zhongji automatic control equipment, Inc. The methane concentration sensor is KGJ23 type high-low concentration methane sensor of Beijing Tongde Chuangye science and technology Limited.
The first adsorption tower 11 and the second adsorption tower 12 are arranged in parallel; the adsorption and desorption processes can be alternately carried out; the adsorbent filled in the first adsorption tower 11 and the second adsorption tower 12 has a specific surface area of more than 2000m/g and is active carbon with a micropore structure; the adsorbent has good adsorption effect, and can better reduce the gas concentration of ventilation air;
the control ends of the first electromagnetic valve 9, the second electromagnetic valve 10, the third electromagnetic valve 16, the fourth electromagnetic valve 17, the fifth electromagnetic valve 15 and the sixth electromagnetic valve 18 are respectively connected with the output end of the PLC 4; the electromagnetic valve is a high-temperature resistant electromagnetic valve; the ZCGL ultrahigh-temperature electromagnetic valve of Shanghai Juliang electromagnetic valve manufacturing Limited company can be selected.
As a further improvement of the embodiment, a gas pressure sensor is arranged in the vacuum pump, and a pressure sensor and a methane concentration sensor are arranged in the gas storage tank;
the ventilation air inlet pipe is provided with a drier 6, so that the ventilation air is dried more like the drying of the ventilation air, the moisture is prevented from being adsorbed by the adsorbent, and finally the ventilation air is recovered into the recovered gas.
The working principle of the system is as follows: the ventilation air methane enters the booster pump after being dehydrated by the drier 6 on the ventilation air inlet pipe, so that the moisture is prevented from entering the booster pump, and the water vapor is prevented from being absorbed by the adsorbent; the pressure value required by the booster pump is set, the pressure value in the booster pump is monitored in real time through the first gas pressure sensor 8 so as to meet the required requirement, the gas after being boosted sequentially enters the first adsorption tower 11 and the second adsorption tower 12 through the first electromagnetic valve 9 and the second electromagnetic valve 10 to be adsorbed, and the gas pressure in the adsorption towers is monitored through the gas pressure sensors arranged on the first adsorption tower 11 and the second adsorption tower 12. The first adsorption tower 11 and the second adsorption tower 12 alternately adsorb methane in the gas, if the pressure monitored by the gas pressure sensor in the first adsorption tower 11 reaches a set value, the fourth electromagnetic valve 17 is opened, meanwhile, the third electromagnetic valve 16 and the vacuum pump 19 pump away the gas in the adsorption tower and send the gas to the gas storage tank 20 connected with the vacuum pump for storage. The fourth electromagnetic valve 17 and the third electromagnetic valve 16 are alternately closed and opened, so that the opening and the closing are alternately carried out; it is ensured that the adsorption-saturated gas does not leak from the main exhaust port 23 during the pumping of the vacuum pump 19. This is performed as a half cycle, and thereafter the second adsorption tower 12 adsorbs, and the five solenoid valves 15 and the sixth solenoid valve 18 are alternately opened and closed during the adsorption. The vacuum pump pumps the methane from the second adsorption tower 12 and then changes to a cycle. The whole adsorption and air exhaust process is carried out under the control of the monitoring system, and automatic control can be realized. The gas pressure in the adsorption tower is monitored in real time through the gas pressure sensors in the first adsorption tower 11 and the second adsorption tower 12, the electromagnetic valve connected with the gas pressure sensor is immediately opened to extract methane and evacuate when the set pressure value is reached, and danger caused by overlarge gas pressure in the adsorption tower is prevented. Through set up gas pressure sensor real-time supervision pressure wherein in the gas holder to in time change the gas holder, still set up the methane concentration sensor in the gas holder in addition and in time monitor the methane concentration in the jar, can obtain the methane gas of certain concentration as required.
Claims (7)
1. A coal mine ventilation air methane recovery system comprises: the ventilation air inlet pipe (5), the ventilation air inlet pipe (5) is connected with an air inlet of the booster pump (7); an air inlet of the booster pump (7) is respectively connected with air inlet ends of a first adsorption tower (11) and a second adsorption tower (12) through a first electromagnetic valve (9) and a second electromagnetic valve (10); the air outlet end of the first adsorption tower (11) is respectively connected with a main exhaust port (23) and a vacuum pump (19) through a third electromagnetic valve (16) and a fourth electromagnetic valve (17); the gas outlet end of the second adsorption tower (12) is respectively connected with a main exhaust port (23) and a vacuum pump (19) through a fifth electromagnetic valve (15) and a sixth electromagnetic valve (18); the vacuum pump (19) is connected with a gas storage tank (20).
2. The coal mine ventilation air methane recovery system of claim 1, wherein: a first gas pressure sensor (8) is installed in the booster pump (7), a second gas pressure sensor (13) is installed in the first adsorption tower (11), a third gas pressure sensor (14) is installed in the second adsorption tower (12), and a fourth gas pressure sensor (21) and a methane concentration sensor (22) are installed in the gas storage tank (20); the first gas pressure sensor (8), the second gas pressure sensor (13), the third gas pressure sensor (14), the fourth gas pressure sensor (21) and the methane concentration sensor (22) are respectively connected with the input end of the PLC (4).
3. The coal mine ventilation air methane recovery system of claim 1, wherein: the first adsorption tower (11) and the second adsorption tower (12) are arranged in parallel.
4. The coal mine ventilation air methane recovery system of claim 1, wherein: the PLC (4) is connected with the monitoring system (1) through an RS485 bus (3).
5. The coal mine ventilation air methane recovery system of claim 2, wherein: the control ends of the first electromagnetic valve (9), the second electromagnetic valve (10), the third electromagnetic valve (16), the fourth electromagnetic valve (17), the fifth electromagnetic valve (15) and the sixth electromagnetic valve (18) are respectively connected with the output end of the PLC (4).
6. The coal mine ventilation air methane recovery system of claim 1, wherein: the specific surface area of the adsorbent packed in the first adsorption tower (11) and the second adsorption tower (12) is more than 2000 m/g.
7. The coal mine ventilation air methane recovery system of claim 1, wherein: a drier (6) is arranged on the ventilation air inlet pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020219947.2U CN211753696U (en) | 2020-02-27 | 2020-02-27 | Coal mine ventilation air methane recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020219947.2U CN211753696U (en) | 2020-02-27 | 2020-02-27 | Coal mine ventilation air methane recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211753696U true CN211753696U (en) | 2020-10-27 |
Family
ID=72910878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020219947.2U Expired - Fee Related CN211753696U (en) | 2020-02-27 | 2020-02-27 | Coal mine ventilation air methane recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211753696U (en) |
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2020
- 2020-02-27 CN CN202020219947.2U patent/CN211753696U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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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: 20201027 |