CN201650343U - Low-density methane gas mixture conveying system for methane gas oxidation device - Google Patents
Low-density methane gas mixture conveying system for methane gas oxidation device Download PDFInfo
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- CN201650343U CN201650343U CN2010201395231U CN201020139523U CN201650343U CN 201650343 U CN201650343 U CN 201650343U CN 2010201395231 U CN2010201395231 U CN 2010201395231U CN 201020139523 U CN201020139523 U CN 201020139523U CN 201650343 U CN201650343 U CN 201650343U
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Abstract
The utility model belongs to the technical field of comprehensive utilization of methane gas, and particularly relates to a low-density methane gas mixture conveying system applied to a methane gas oxidation device for low-density methane gas oxidation treatment in the coal mine. The low-density methane gas mixture conveying system is characterized in that a low-density methane gas conveying pipeline connected with a methane gas drainage station is included; a stop valve, an emergency cut-off electromagnetic valve, an electric butterfly valve and a fire arrestor are mounted on the low-density methane gas conveying pipeline sequentially; the other end of the low-density methane gas conveying pipeline is inserted into a mixture gas pipeline; a induction tunnel is arranged at the tail end of the mixture gas pipeline; the induction tunnel comprises two parts, namely, an induction tunnel flaring and an induction tunnel cone; an air inlet is formed on the mixture gas pipeline in the front of a rotary vane; the air butterfly valve is arranged at the air inlet; and the rotary vane and an air blower are arranged in the mixture gas pipeline at the rear part of the induction tunnel in sequence. The utility model has the advantages of safe use, uniform gas mixture, stability, reliability, high automation degree, and resource conservation.
Description
Technical field
The utility model belongs to the technical field of gas comprehensive utilization, is specifically related to a kind of methane oxidized apparatus that is applied to coal mine light concentration mash gas oxidation processes low concentration gas mixing and conveying system.
Background technology
According to data, China is annual to rank first in the world because of coal mining reaches 100 billion cubic meters to the methane gas of airborne release, accounts for 1/3 of world's coal mining discharging methane total amount, has caused the common concern of international community.In the methane of China's coal mines discharging, low concentration pump drainage gas (methane volume content 6%-25%) accounts for 1/3, because the low concentration gas of 5%-16% is in explosive range, the low concentration gas of 16%-25% is in explosion limit range, the low concentration gas of 8%-10% belongs to extremely responsive explosive range, so country clearly stipulated in the past, be lower than 30% low concentration gas and do not allow to store utilization, the directly discharging in atmosphere.Aggravate atmosphere pollution so on the one hand, caused greenhouse effect (greenhouse effect of methane are 21 times of carbon dioxide); Caused the serious waste of limited non-renewable resources on the other hand, only annual its low heat valve of gas that discharges from coal mine methane is equivalent to the low heat valve of more than 1,000 ten thousand tons of standard coals.Therefore, carry out the technical research of low concentration pump drainage gas utilization,, improve atmosphere quality, have very important significance for effectively utilizing existing resource and reducing greenhouse gas emission; Can promote simultaneously China's response environment and change and contractual capacity, improve the environmental protection equipment technical level, promote the Environmental Protection in China industry development.
At present, concentration is higher than 8% gas, can directly enter the internal combustion engine generating; And concentration is lower than 8% gas, does not also have other effective means.
The utility model content
The purpose of this utility model is to provide a kind of concentration that ensures to be in the low concentration gas and even, safe the mixing of air of the 3%-30% of risk range, satisfy the coal mine light concentration mash gas oxidation and utilize requirement, thereby improve low concentration pump drainage gas resources utilization rate, improve the gas utilization economic benefit, reduce greenhouse gas emission, improve atmosphere quality, promote the methane oxidized apparatus low concentration gas mixing and conveying system of Environmental Protection in China industry development.
The utility model is realized by the following technical solutions:
It is a kind of methane oxidized apparatus low concentration gas mixing and conveying system, it is characterized in that comprising the low concentration gas conveyance conduit that is connected with the gas drainage under suction station, low concentration gas carries gas tube that stop valve is installed successively, emergency cut-off magnetic valve, electric butterfly valve and spark arrester, the other end of low concentration gas conveyance conduit inserts gaseous mixture pipeline inside, end is provided with induction tunnel, induction tunnel is made up of induction tunnel enlarging and induction tunnel cone two parts, be provided with rotating vane and blast fan successively in the gaseous mixture pipeline after the induction tunnel, gaseous mixture pipeline before the rotating vane is provided with air intake, and the air intake place is provided with air butterfly valve.
Stop valve is two, and the low concentration gas conveyance conduit between two stop valves is provided with the gas exhaust stack, and the gas exhaust stack is provided with wet type and diffuses valve.Wet type is diffused the pressure that valve can suitably increase pump drainage gas, reaches the requirement of system to gas flow.
Gaseous mixture pipeline before the rotating vane is provided with explosion proof door.Explosion proof door is a plurality of, should be provided with at a certain distance, in case of emergency lets out except that the pressure in the pipeline.
Be equipped with the sensing methane concentration device on low concentration gas conveyance conduit and the gaseous mixture pipeline.
Emergency cut-off magnetic valve, electric butterfly valve, spark arrester, air butterfly valve, sensing methane concentration device all are connected with monitoring system.
Rotating vane is the special-purpose blade of explosion-proof fan.
Operating principle of the present utility model is as follows:
One can not directly enter methane oxidized apparatus the exit concentration of the extraction pumping plant in colliery, need dilute, with the reasonable concentration scope (under one situation, gas density is not more than 1.5%) that just can reach use after air mixes.Low concentration gas from the gas drainage under suction station enters in the gaseous mixture pipeline by the low concentration gas conveyance conduit, monitoring system is according to the gas density in the gaseous mixture pipeline, automatically regulate the electric butterfly valve on the low concentration gas conveyance conduit and the aperture of the air butterfly valve on the air duct, thereby the gas density that obtains to satisfy the oxidation unit requirement is not more than 1.5% mist.The part that low concentration gas mixes with air is installed induction tunnel, strengthens gas flow speed and changes flow direction, fully mixes with air under the stirring of rotating vane.The gaseous mixture that mixes enters methane oxidized apparatus by blast fan, and during blast fan work, air intake forms certain negative pressure, further accelerates the gaseous mixture flow velocity, and low concentration gas and air are mixed fully.The utility model is provided with a plurality of sensing methane concentration devices, and transfer of data to monitoring system, is controlled to adjust the aperture of electric butterfly valve by monitoring system, and judges in case of emergency, in time cuts off the low concentration gas source of the gas.Part in gas and Air mixing should be provided with explosion proof door at a certain distance, in case of emergency lets out except that the pressure in the pipeline.
The utility model running all processes is by computer monitoring, have safe in utilization, gas mixes, reliable and stable, automaticity is high, save the advantage of resource.Technology such as that the utility model is specifically related to is explosion-proof, fire-fighting, fluid mechanics principle, flow rate conversion, gas monitor, automation control, advanced design, type selecting is reliable, can guarantee safe, stable, the operation continuously of native system.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model;
Fig. 2 is the A portion enlarged diagram among Fig. 1.
1 low concentration gas conveyance conduit; 2 emergency cut-off magnetic valves; 3 electric butterfly valves; 4 spark arresters; 5 air intakes; 6 air butterfly valves; 7 air ducts; 8 induction tunnels; 9 explosion proof doors; 10 rotating vanes; 11 sensing methane concentration devices; 12 gaseous mixture pipelines; 13 blast fans; 14 induction tunnel enlargings; 15 induction tunnel cones; 16 stop valves; 17 wet types are diffused valve; 18 stop valves; 19 gas exhaust stacks; 20 monitoring systems.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further elaborated.
As shown in Figure 1 and Figure 2: the low concentration gas conveyance conduit 1 that is connected with the gas drainage under suction station is installed stop valve 18, stop valve 16, emergency cut-off magnetic valve 2, electric butterfly valve 3 and spark arrester 4 successively, insert then in the big caliber of gaseous mixture pipeline 12, the low concentration gas transfer pipeline 1 terminal induction tunnel 8 of installing, induction tunnel 8 is made up of induction tunnel enlarging 14 and induction tunnel cone 15 two parts, its sectional area should be slightly larger than the sectional area of low concentration gas conveyance conduit 1, and the length that induction tunnel 8 inserts gaseous mixture pipeline 12 should be greater than gaseous mixture pipeline 12 diameters of twice; Establish explosion proof door 9 on the pipeline of gas and air mixing portion at a certain distance, rotating vane 10 is installed in induction tunnel 8 backs, and its material is answered antistatic.Air air intake 5 should be above the ground level more than the 3m, and air intake 5 places are provided with air butterfly valve 6, and electric butterfly valve 3 can automatically controlledly be regulated.The impeller rotating part of blast fan 13 should be taked explosion precaution, and blade should adopt antistatic material or be coated with antistatic material, and partly produces when friction with Blower Housing, should not produce spark.Pipeline between stop valve 18, the stop valve 16 is provided with gas exhaust stack 19, and gas exhaust stack 19 is provided with wet type and diffuses valve 17.Be equipped with sensing methane concentration device 11 on the discharge pipe of low concentration gas conveyance conduit, gaseous mixture pipeline and blast fan.
During the utility model work: low-concentration methane gas enters in the low concentration gas conveyance conduit 1 from the gas drainage under suction station, successively by stop valve 18, stop valve 16, emergency cut-off magnetic valve 2, electric butterfly valve 3 and spark arrester 4, enter then in the induction tunnel 8, under the twitch of blast fan 13, fully mix with the air of air intake 5 along induction tunnel cone break-in acceleration, and under rotating vane 10 stirs, mix more even.The gaseous mixture that mixes enters methane oxidized apparatus by blast fan 13, and during blast fan work, air intake 5 forms certain negative pressure, further accelerates the gaseous mixture flow velocity, and low concentration gas and air are mixed fully.
Arrange a plurality of sensing methane concentration devices 11 in the pipe-line system, the aperture that monitoring system 20 is regulated electric butterfly valve 3 and air butterfly valve 6 automatically according to the signal of feedback, just in case gas density is overproof, signal is reached computer, guarantee urgent electromagnetic valve action by control system, in time cut off the gas source of the gas, guarantee the safety of system.
The requirement of the safety in production industry standard AQ1076-2009 of the People's Republic of China (PRC) " coal mine light concentration mash gas line transportation safe-guard system design specifications " is satisfied in design of the present utility model.
Claims (6)
1. methane oxidized apparatus low concentration gas mixing and conveying system, it is characterized in that comprising the low concentration gas conveyance conduit that is connected with the gas drainage under suction station, low concentration gas carries gas tube that stop valve is installed successively, emergency cut-off magnetic valve, electric butterfly valve and spark arrester, the other end of low concentration gas conveyance conduit inserts gaseous mixture pipeline inside, end is provided with induction tunnel, induction tunnel is made up of induction tunnel enlarging and induction tunnel cone two parts, be provided with rotating vane and blast fan successively in the gaseous mixture pipeline after the induction tunnel, gaseous mixture pipeline before the rotating vane is provided with air intake, and the air intake place is provided with air butterfly valve.
2. methane oxidized apparatus low concentration gas mixing and conveying system according to claim 1, it is characterized in that stop valve is two, low concentration gas conveyance conduit between two stop valves is provided with the gas exhaust stack, and the gas exhaust stack is provided with wet type and diffuses valve.
3. methane oxidized apparatus low concentration gas mixing and conveying system according to claim 1 is characterized in that the gaseous mixture pipeline before the rotating vane is provided with explosion proof door.
4. methane oxidized apparatus low concentration gas mixing and conveying system according to claim 1 is characterized in that being equipped with the sensing methane concentration device on low concentration gas conveyance conduit and the gaseous mixture pipeline.
5. methane oxidized apparatus low concentration gas mixing and conveying system according to claim 1 is characterized in that emergency cut-off magnetic valve, electric butterfly valve, spark arrester, air butterfly valve, sensing methane concentration device all are connected with monitoring system.
6. according to claim 1 or 3 described methane oxidized apparatus low concentration gas mixing and conveying systems, it is characterized in that rotating vane is the special-purpose blade of explosion-proof fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201395231U CN201650343U (en) | 2010-03-24 | 2010-03-24 | Low-density methane gas mixture conveying system for methane gas oxidation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201395231U CN201650343U (en) | 2010-03-24 | 2010-03-24 | Low-density methane gas mixture conveying system for methane gas oxidation device |
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| Publication Number | Publication Date |
|---|---|
| CN201650343U true CN201650343U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201395231U Expired - Fee Related CN201650343U (en) | 2010-03-24 | 2010-03-24 | Low-density methane gas mixture conveying system for methane gas oxidation device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359727A (en) * | 2011-03-24 | 2012-02-22 | 王平 | Injection impeller burner |
| CN104033174A (en) * | 2014-06-10 | 2014-09-10 | 中国矿业大学 | Safe and automatic methane concentration regulation system and method |
| US10537849B2 (en) | 2015-03-11 | 2020-01-21 | Johnson Matthey Davy Technologies Limited | Process for removing CO2 from crude natural gas |
| US10828601B2 (en) | 2013-10-21 | 2020-11-10 | Johnson Matthey Davy Technologies Limited | Process for removing methane from a gas |
-
2010
- 2010-03-24 CN CN2010201395231U patent/CN201650343U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359727A (en) * | 2011-03-24 | 2012-02-22 | 王平 | Injection impeller burner |
| US10828601B2 (en) | 2013-10-21 | 2020-11-10 | Johnson Matthey Davy Technologies Limited | Process for removing methane from a gas |
| CN104033174A (en) * | 2014-06-10 | 2014-09-10 | 中国矿业大学 | Safe and automatic methane concentration regulation system and method |
| CN104033174B (en) * | 2014-06-10 | 2016-03-30 | 中国矿业大学 | A kind of gas density safety automation regulating system and method |
| US10537849B2 (en) | 2015-03-11 | 2020-01-21 | Johnson Matthey Davy Technologies Limited | Process for removing CO2 from crude 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20170324 |