CN2881102Y

CN2881102Y - Combined device for explosion-proof, dust proof and use of coal mine gas

Info

Publication number: CN2881102Y
Application number: CN 200620070034
Authority: CN
Inventors: 吴金南; 吴洪明
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-03-10
Filing date: 2006-03-10
Publication date: 2007-03-21
Anticipated expiration: 2016-03-10

Abstract

The utility mode relates to a combined device for explosion-proof, dust proof and use of coal mine gas, which is characterized in that: an air opening (2) of a coal face (3) is connected with a nitrogen generator (1) or an oxygen generator, a return air intake (4) of the coal face is connected with a vacuum pump (5), the vacuum pump is connected with a methane deposit pool (6). The device admits nitrogen with pressure from the air inlet to the coal face and the bottom of the coal mine, uses nitrogen to replace air to prevent gas explosions, coal dust suffocation and gas poisoning and collect methane as resources for reuse.

Description

The explosion-proof dustproof composite set that utilizes that reaches of coal mine gas

Technical field

The utility model relates to the explosion-proof dustproof composite set that utilizes that reaches of a kind of coal mine gas.

Background technology

Gas is non-conventional gas, and calorific value is 2 to 5 times of general coal gas, seldom produces pollutant after the burning, belongs to the high-quality clean gas energy.Coal mine gas from explosion is actually gas in the colliery and reaches and meet naked light with airborne oxygen after the explosion limit and in very short time the violent chemical reaction that emits light and heat can take place, thus the effect of damaging and cause the people life property loss.Explosive reaction has three key elements: 1, methane, and its concentration will reach explosion limit; 2, air (oxygen) is arranged; 3, naked light (thermal source) is arranged.As long as eliminate 1 or 2, blast just can not take place in three key elements.

About naked light (thermal source), as long as coal-getter takes care, prevent naked light, can the minimizing accident, but fundamentally stop must not, blown out spark, frictions such as machinery, instrument produce static spark, and coal dust contacts the generation eremacausis with oxygen also can emit heat, and heat is many, when temperature reaches certain value coal dust can spontaneous combustion by heating blast, so that naked light is kept away is unavoidable.

The concentration of methane can be taked the way of extraction, and methane is hazards, also is a kind of resource, and available air exhauster extracts as industrial chemicals or fuel.Extraction methane can reduce concentration, but can not tackle the problem at its root, because methane and coal, oily symbiosis are together, methane also can overflow during coal mining, also can produce carbon monoxide as the accident of blasting in addition, this also is a kind of colourless odorlessness imflammable gas, and this gas concentration reaches explosion limit chance naked light and also can set off an explosion, and the poisonous meeting of carbon monoxide is poisoned the people.So the way of depending merely on extraction methane, carbon monoxide still can not prevent the generation of explosion accident fully.

All be to lead to into air from air intake at present, to guarantee need and diluting gas density and getting rid of heat and steam of workman's breathing, blast again easily with airborne oxygen chance naked light in the back but gas density reaches capacity.Be mixed with air (oxygen) in the methane, make also difficulty of industrial chemicals and fuel even draw up, dangerous, can cause an explosion accident.So best bet is the amount of control oxygen, there is not oxygen (air) blast just can not take place.

Summary of the invention

In order to overcome the shortcoming that prior art exists, the purpose of this utility model provides a kind of nitrogen of forward (FWD) certain pressure that fills from air intake to coal-face and mine bottom, replace air with nitrogen, prevent gas explosion and the composite set that methane collection is utilized again.

The utility model adopts technical scheme to be: the ventilation opening of coal-face is connected with nitrogen making machine or oxygenerator, and the return air inlet of coal-face is connected with vacuum pump, and vacuum pump connects methane store.

The nitrogen that fills the forward (FWD) certain pressure through nitrogen making machine from air intake replaces air to work plane and mine bottom with nitrogen, just can prevent gas explosion.Nitrogen is that nontoxic burning of colorless and odorless do not supported the gas that burns source electrode wide yet, and the pressurized nitrogen temperature is lower, can reduce the work plane temperature, helps burn-proof and explosion prevention, and the density of nitrogen is bigger than the density of methane.Nitrogen occupies work plane and mine bottom, and methane is up caught up with, and whole space has been full of the mixed gas of methane and nitrogen, constantly fills the into constantly past again simultaneously ground of nitrogen pump drainage methane, and is delivered in the methane air storage methane standby.Work plane and down-hole have only methane and nitrogen and do not have oxygen like this, even naked light was arranged originally or have the coal dust burning also can extinguish, fill concentration and no oxygen that nitrogen into can reduce methane, just can not burn and explode.Though draw up come methane be mixed with minute quantity nitrogen, as make industrial chemicals and fuel can not set off an explosion, at most just the calorific value during a little bit smaller influence burning of methane concentration.The staff goes into the well with the self-rescuer that can make oxygen with oxygen bag and standby oxygen, guarantees to have the oxygen of capacity to breathe, and can avoid work inspiration coal dust and silica dust, can prevent that the workman from suffering from anthraco-silicosis, and protection miner health is saved medical fee.

The utility model compared with prior art has the following advantages:

1, burn-proof and explosion prevention reduces injures and deaths, reduces the loss, and avoids stopping work and abandoned well, increases economic efficiency;

2, methane is done the resource recovery and made industrial chemicals, fuel feedback, turn waste into wealth, create a large amount of wealth of societys, alleviate the nervous situation of energy supply;

3, can prevent suffocating and gas poisoning, the workman goes into the well with the oxygen bag and is used to breathe suffocate phenomenon and the gas that occurs before can avoiding, the generation of anthracemia, protection workers ' health;

4, avoid working face of coal seam to catch fire, thicker seam mining once after, have air to enter working lining, after a period of time, coal and airborne oxygen reaction spontaneous combustion cause that the coalfield catches fire, and advance nitrogen as filling, just can not burn in the coalfield.

Description of drawings

Fig. 1 is the utility model structural representation.

Among Fig. 1, nitrogen making machine 1, ventilation opening 2, coal-face 3, return air inlet 4, vacuum pump 5, methane store 6 goes into the well 7 on the staff, transportation well 8.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is elaborated.

As shown in Figure 1, the ventilation opening 2 of coal-face 3 is connected with nitrogen making machine 1 or oxygenerator, and the return air inlet 4 of coal-face 3 is connected with vacuum pump 5, and vacuum pump 5 connects methane store 6.Constantly fill pure nitrogen gas into pressure by nitrogen making machine 1 to coal-face 3 and mine bottom, nitrogen is caught up with methane at the bottom of the ore deposit to return air inlet 4, and dilution methane, adopts vacuum pump 5 extraction methane to be transported to ground methane store 6 and makes industrial chemicals or fuel feedback.The staff is with well operations under oxygen bag and the self-rescuer.All there is the oxyen manutactory in general big colliery, and the source of nitrogen can be provided by the oxyen manutactory, and the oxyen manutactory comes oxygen separation and nitrogen with air specially, and general all unnecessary nitrogen emptying, so cheap nitrogen can be made full use of.

Claims

1, the explosion-proof dustproof composite set that utilizes that reaches of a kind of coal mine gas, it is characterized in that: the ventilation opening (2) of coal-face (3) is connected with nitrogen making machine (1) or oxygenerator, the return air inlet (4) of coal-face (3) is connected with vacuum pump (5), and vacuum pump connects methane store (6).