CN210483691U - Gas extraction system - Google Patents
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- CN210483691U CN210483691U CN201921074948.6U CN201921074948U CN210483691U CN 210483691 U CN210483691 U CN 210483691U CN 201921074948 U CN201921074948 U CN 201921074948U CN 210483691 U CN210483691 U CN 210483691U
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Abstract
The utility model discloses a gas drainage system, including fracturing drilling and drainage drilling, the fracturing pipe is inserted in the fracturing drilling, and the drainage pipe is inserted respectively in each drainage drilling, and the fracturing pipe stretches out of the coal bed bottom plate downwards and is connected with a mixing container, and the outlet of the mixing container is connected with the fracturing pipe, and the first inlet and the second inlet of the mixing container are connected with a first component liquid supply device and a second component liquid supply device respectively; the fracturing pipe is connected with a pressure gauge and a discharge pipe, each extraction pipe extends downwards out of the coal bed bottom plate and is connected with an extraction main pipe, and the extraction main pipe is connected with a gas extraction device. The utility model discloses a gas drainage system simple structure, convenient operation can utilize first component to supply liquid device and second component to supply liquid device to provide highly compressed first component and second component respectively to form in mixing container the utility model relates to a hydraulic fracturing liquid conveniently utilizes hydraulic fracturing liquid to carry out hydraulic fracturing to the coal seam, and is better to the anti-reflection effect of fracturing of coal seam.
Description
Technical Field
The utility model relates to a coal mining technology field especially relates to coal reservoir anti-reflection and gas drainage technique.
Background
Coal mine gas is the main culprit of coal mine disasters and is a non-renewable clean energy source, and coal and gas co-mining is a fundamental technology for realizing gas outburst prevention and resource utilization.
Coal beds in China generally have the characteristics of high gas content, strong adsorbability, low permeability and the like, most of coal bed gas is stored on the inner surfaces of pores of coal matrix in an adsorption state, and only a small amount of coal bed gas is dissociated in cleats and cracks. And for gas extraction, drilling extraction is mainly adopted, and the extraction efficiency mainly depends on the air permeability of the coal body, so that the permeability increase of the coal reservoir and the increase of the air permeability of the coal body become an effective way for realizing the co-extraction of coal and gas.
Along with the increasing of the depth of a mine, the restriction of the gas permeability of a coal body on gas extraction is more and more serious, and an efficient coal reservoir permeability increasing technology becomes a necessary technology for safe production and coal bed gas extraction of a coal mine. In order to increase permeability of a coal reservoir, a plurality of researchers develop researches such as hydraulic fracturing, high-pressure gas fracturing, microwave fracturing and chemical permeability improvement, but the existing physical permeability improvement technologies such as hydraulic fracturing, high-pressure gas and microwave fracturing are mainly applied to permeability improvement of coal seams with harder coal quality and better permeability, and the existing chemical permeability improvement has the problems of low permeability improvement efficiency, large environmental pollution, poor stability and high toxicity of permeability improvement agents and the like.
For the reasons, it is necessary to develop an efficient, safe and stable chemical permeability increasing method and a gas extraction system, so as to improve the gas permeability of the coal and facilitate gas extraction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a can improve gas drainage efficiency's gas drainage system.
In order to achieve the purpose, the gas extraction system comprises a fracturing drill hole and an extraction drill hole which are arranged between a coal seam top plate and a coal seam bottom plate, wherein the fracturing drill hole is provided with a fracturing influence area in the coal seam, and the extraction drill holes are respectively arranged in the fracturing influence areas on the left side and the right side of one fracturing drill hole;
fracturing pipes are inserted into the fracturing drill holes, extraction pipes are respectively inserted into the extraction drill holes, openings for liquid to flow into are formed in the fracturing pipes in the fracturing drill holes, and openings for gas to flow out are formed in the extraction pipes in the extraction drill holes; the fracturing pipe extends downwards out of the coal bed bottom plate and is connected with a mixing container, the mixing container is provided with a first inlet, a second inlet and an outlet, the outlet of the mixing container is connected with the fracturing pipe, the first inlet of the mixing container is connected with a first component liquid supply device, and the second inlet of the mixing container is connected with a second component liquid supply device;
a fracturing pipe between the mixing container and the fracturing drill hole is connected with a pressure gauge and a discharge pipe, and the discharge pipe is provided with a discharge valve;
and each extraction pipe extends downwards out of the coal seam bottom plate and is connected with an extraction main pipe, the extraction main pipe is connected with a gas extraction device, an extraction main valve is arranged on the extraction main pipe, and each extraction pipe is provided with an extraction branch valve.
The first component liquid supply device comprises a first component liquid supply box, the first component liquid supply box is connected with a first component liquid supply pump through a first component liquid outlet pipe, an outlet of the first component liquid supply pump is connected with a first inlet of the mixing container through a first component liquid supply pipe, and a first component liquid supply valve is arranged on the first component liquid supply pipe;
the second component liquid supply device comprises a second component liquid supply box, the second component liquid supply box is connected with a second component liquid supply pump through a second component liquid outlet pipe, an outlet of the second component liquid supply pump is connected with a second inlet of the mixing container through a second component liquid supply pipe, and a second component liquid supply valve is arranged on the second component liquid supply pipe.
And an ultrasonic vibration plate is arranged on the bottom wall of the second component liquid supply tank, and an ultrasonic generator is arranged on the ultrasonic vibration plate.
The utility model discloses have following advantage:
the utility model discloses a gas drainage system simple structure, convenient operation can utilize first component to supply liquid device and second component to supply liquid device to provide highly compressed first component and second component respectively to form in mixing container the utility model relates to a hydraulic fracturing liquid conveniently utilizes hydraulic fracturing liquid to carry out hydraulic fracturing to the coal seam, and is better to the anti-reflection effect of fracturing of coal seam.
The gas drainage device produces the negative pressure, and the gas in the area is influenced to the fracturing is taken out through taking out and drawing out drilling and taking out the pipe and taking out the house steward, thereby utilizes the utility model discloses a gas drainage system realizes fracturing and takes out comprehensive operation.
The ultrasonic vibration plate can promote the porous carbon containing transition metal ions to be fully and uniformly mixed with water by transmitting ultrasonic waves into the water, so that the reaction efficiency of the hydraulic fracturing fluid and organic matters in the coal bed is improved.
Pure water or single persulfate solution is used as the hydraulic fracturing fluid, the anti-reflection effect can be improved, but the improvement effect is poor, and the persulfate solution and the porous carbon mixed solution containing transition metal ions are mixed to be used as the hydraulic fracturing fluid, so that the effect of improving the anti-reflection effect is very obvious.
Adopt the technical scheme of the utility model, when carrying out hydraulic fracturing to the coal body, can utilize hydraulic fracturing liquid and the organic matter of different molecular weights in the coal to continuously carry out oxidation, normal position modification reaction in the temperature range of broad, and then dissolve the organic matter part of low molecular weight, dredge coal reservoir fracture and hole, also reduce coal seam adsorption methane ability to promote the absorptive gas in coal seam to free gas conversion, compare with simple hydraulic fracturing in the past and improve the anti-reflection effect of coal body by a wide margin.
The utility model discloses a gas drainage method utilizes hydraulic fracturing liquid and gas drainage system to go on, compares current gas drainage method, can improve gas drainage efficiency by a wide margin, has both solved the safety problem that coal seam gas brought for coal mining rapidly, has improved gas drainage efficiency again, has increased gas output.
Finally, the utility model discloses a hydraulic fracturing fluid, gas drainage system and gas drainage method have safety, stability and efficient characteristics.
Drawings
FIG. 1 is a schematic structural diagram of a middle gas extraction system of the present invention;
FIG. 2 is a gas extraction velocity plot for a single extraction borehole with different fracturing solutions.
Detailed Description
The utility model provides a hydraulic fracturing fluid for coal seam fracturing is anti-reflection, including first component and second component, first component is the aqueous solution of persulfate, and the second component is the mixed liquid of porous charcoal that contains transition metal ion and water, and the volume fraction of first component and second component is: 0.9-1.1 parts of first component (including both values, the same below) and 0.9-1.1 parts of second component. Further, the preferred parts by volume of the first component and the second component are: 1 part of first component and 1 part of second component.
The persulfate in the first component is ammonium persulfate and/or sodium persulfate and/or calcium persulfate and/or potassium persulfate, that is, the persulfate can adopt any one, any two, any three or all of ammonium persulfate, sodium persulfate, calcium persulfate and potassium persulfate. The persulfate and water in the first component comprise the following components in parts by weight: 1-25 parts of persulfate and 100 parts of water.
The porous carbon containing transition metal ions in the second component is prepared by the following method:
mixing transition metal salt and aromatic carboxylic acid by using a ball mill, and calcining the obtained mixture at high temperature in an inert atmosphere to obtain porous carbon containing transition metal ions; wherein, the ball mill is conventional equipment, and the specific structure is not described in detail.
The transition metal salt is nickel nitrate and/or manganese chloride and/or cobalt nitrate and/or copper sulfate and/or zinc nitrate (namely one or more of nickel nitrate, manganese chloride, cobalt nitrate, copper sulfate and zinc nitrate), the aromatic carboxylic acid is isophthalic acid and/or terephthalic acid and derivatives thereof and/or p-hydroxybenzoic acid and/or p-aminobenzoic acid (namely one or more of isophthalic acid, terephthalic acid and derivatives thereof, p-hydroxybenzoic acid and p-aminobenzoic acid), the inert atmosphere is nitrogen or argon atmosphere, and the calcining temperature is 500-1000 ℃; the mass parts of the transition metal salt and the aromatic carboxylic acid are as follows: 0.8-1.2 parts of transition metal salt, preferably 1.2 parts; 0.8-1.2 parts of aromatic carboxylic acid, preferably 0.8 part.
The second component comprises porous carbon containing transition metal ions and water in parts by weight: less than or equal to 25 parts of porous carbon containing transition metal ions and 100 parts of water.
As shown in fig. 1, the utility model also discloses a gas drainage system, the comprehensive operation is taken out in fracturing drainage of being convenient for to use above-mentioned hydraulic fracturing liquid, of course also can only use water and do not use above-mentioned hydraulic fracturing liquid to carry out hydraulic fracturing.
The utility model discloses a gas drainage system includes fracturing drilling 3 and drainage drilling 4 that set up between coal seam roof 1 and coal seam bottom plate 2, fracturing drilling 3 has the fracturing influence region in the coal seam (the coal body in this region all receives the fracturing anti-reflection influence), is equipped with respectively in the fracturing influence region of a fracturing drilling 3 left and right sides drainage drilling 4;
a pressure gauge 11 and a discharge pipe 12 are connected to a fracturing pipe between the mixing container 7 and the fracturing drill hole 3, and a discharge valve 13 is arranged on the discharge pipe 12;
the extraction pipes 6 respectively extend downwards out of the coal seam bottom plate 2 and are connected with an extraction main pipe 14, the extraction main pipe 14 is connected with a gas extraction device 15, an extraction main valve 16 is arranged on the extraction main pipe 14, and extraction branch valves 17 are respectively arranged on the extraction pipes 6.
The gas extraction device 15 is a device capable of generating negative pressure (a device with an exhaust fan and other negative pressure air extractions) in the prior art, and the specific structure is not described in detail.
The first component liquid supply device comprises a first component liquid supply tank 18, the first component liquid supply tank 18 is connected with a first component liquid supply pump 20 through a first component liquid outlet pipe 19, the outlet of the first component liquid supply pump 20 is connected with the first inlet 8 of the mixing container 7 through a first component liquid supply pipe 21, and a first component liquid supply valve 22 is arranged on the first component liquid supply pipe 21;
the second component supply device comprises a second component supply tank 23, the second component supply tank 23 is connected with a second component supply pump 25 through a second component liquid outlet pipe 24, an outlet 10 of the second component supply pump 25 is connected with a second inlet 9 of the mixing container 7 through a second component supply pipe 26, and a second component supply valve 27 is arranged on the second component supply pipe 26.
The first-component liquid-feed pump 20 and the second-component liquid-feed pump 25 are the same in model and thus the liquid-feed amounts are the same, so that the volume ratio of the first component to the second component is naturally maintained at 1: about 1.
The utility model discloses a gas drainage system simple structure, convenient operation can conveniently send into fracturing drilling 3 after mixing first component and second component together, produces the fracturing effect to 3 peripheral coal beds of fracturing drilling. Gas drainage device 15 produces the negative pressure, takes out the gas in the fracturing affected area through taking out and adopt drilling 4 and take out and adopt pipe 6 and take out and adopt house steward 14, utilizes the utility model discloses a hydraulic fracturing liquid realizes fracturing and takes out comprehensive operation, compares ordinary gas drainage system and is showing and improving gas drainage efficiency.
And an ultrasonic vibration plate 28 is arranged on the bottom wall of the second component liquid supply tank 23, and an ultrasonic generator is arranged on the ultrasonic vibration plate 28. The ultrasonic generator is a conventional device, not shown.
The ultrasonic vibration plate 28 can promote the porous carbon containing the transition metal ions to be sufficiently and uniformly mixed with water by transmitting ultrasonic waves into the water.
The utility model also discloses a gas drainage method that uses above-mentioned gas drainage system to go on, go on according to following step:
the first step is a preparation step; the preparing step includes a first sub-step and a second sub-step that are sequentially performed;
the first substep is to drill a hole and prepare hydraulic fracturing fluid, and specifically comprises the steps of performing drilling operation and preparing hydraulic fracturing fluid operation in no sequence;
the drilling operation is to construct a fracturing drill hole and two extraction drill holes 4 from the coal seam bottom plate 2 to the coal seam top plate 1 by using a drilling machine, so that the two extraction drill holes 4 are respectively positioned at two sides of the fracturing drill hole 3 and are both positioned in a fracturing affected area;
preparing a hydraulic fracturing fluid operation by respectively preparing a first component and a second component;
the preparation of the first component is: dissolving 1 to 25 parts by mass of persulfate in 100 parts by mass of clear water and storing in a first component supply tank 18;
the preparation of the second component is: mixing transition metal salt and aromatic carboxylic acid, and calcining the obtained mixture at high temperature in an inert atmosphere to prepare porous carbon containing transition metal ions; placing the porous carbon containing the transition metal ions in clear water and storing in the second component liquid supply tank 23; starting an ultrasonic generator on the ultrasonic vibration plate 28 to uniformly disperse the porous carbon containing the transition metal ions in the clean water in the second component liquid supply tank 23;
the second substep is to arrange fracturing equipment and arrange extraction equipment, wherein the arrangement of the fracturing equipment and the arrangement of the extraction equipment are not in sequence; a pressure gauge 11 and a discharge pipe 12 are arranged at the part of the fracturing pipe 5 outside the fracturing drill hole 3 in advance, and a discharge valve 13 is arranged on the discharge pipe 12; mounting a main extraction valve 16 on the main extraction pipe 14 in advance, and mounting extraction branch valves 17 on the extraction pipes 6;
the arrangement of the fracturing equipment comprises the following steps: extending the fracturing pipe 5 into the fracturing borehole 3, and extending the end part of the fracturing pipe 5 to the coal seam roof 1; the end of the fracturing pipe 5 outside the fracturing bore hole 3 is connected with the outlet 10 of the mixing container 7;
connecting the components of the first component supply device, and connecting a first component supply pipe 21 with the first inlet 8 of the mixing container 7;
connecting the parts of the second component supply device, and connecting the second component supply pipe 26 with the second inlet 9 of the mixing container 7;
the arrangement and extraction equipment comprises the following steps: extending the extraction pipe 6 into the extraction borehole 4, and enabling the end part of the extraction pipe 6 to extend to the coal seam roof 1; connecting one end of the fracturing pipe 5, which is positioned outside the fracturing borehole 3, with an extraction main pipe 14, and connecting the extraction main pipe 14 with a gas extraction device 15;
the second step is a hole sealing step, namely, a hole sealer is used for sealing the hole opening of the fracturing drill hole 3 and the hole opening of the extraction drill hole 4, and then the third step is carried out;
the third step is a hydraulic fracturing step;
closing the discharge valve, opening the first component liquid supply valve, the second component liquid supply valve, the first component liquid supply pump and the second component liquid supply pump, simultaneously pressurizing the first component and the second component, then sending the pressurized first component and the pressurized second component into a fracturing drill hole, and fracturing and permeability increasing the coal seam; observing the readings of the pressure gauge within 5 minutes after the first component liquid feed pump and the second component liquid feed pump are started, wherein the pressure value in the fracturing pipe is an initial pressure value, and the initial pressure value is more than or equal to 25MPa and less than or equal to 30 MPa; continuously observing the indication number of the pressure gauge, closing the first component liquid supply pump, the second component liquid supply pump, the first component liquid supply valve and the second component liquid supply valve when the pressure value in the fracturing pipe falls to 15 +/-3 MPa and is less than or equal to 18MPa for 5 continuous minutes, opening the discharge valve to release the pressure in the fracturing pipe, closing the discharge valve when the indication number of the pressure gauge returns to the normal pressure, ending the third step, and starting the fourth step;
the fourth step is a gas extraction step; the gas extraction step is as follows: opening the main extraction valve and each extraction branch valve, starting the gas extraction device, and extracting and storing the gas at the gas extraction hole;
and (4) observing the gas extraction amount in unit time through the gas extraction device, and stopping performing the fourth step when the gas extraction amount in unit time is less than or equal to 10 liters/minute.
Preparing a first component, wherein persulfate is ammonium persulfate;
preparing a second component, namely preparing porous carbon containing transition metal ions from copper ion-containing porous carbon, mixing copper sulfate and m-benzenetricarboxylic acid according to the mass ratio of 6:4 by using a ball mill, and calcining the obtained mixture at 600 ℃ in a nitrogen atmosphere to obtain the copper ion-containing porous carbon.
The first component adopts 2-10% (inclusive) ammonium persulfate aqueous solution, preferably 5-10%; the second component is a mixed solution of porous carbon containing copper ions and water, and the mass concentration of the porous carbon in the second component is 1-6%, preferably 6%.
The hydraulic fracturing fluid, the gas extraction system and the gas extraction method can oxidize and dissolve low-molecular organic matters in coal, enlarge, increase and dredge pores and cracks of a coal bed, so that a gas migration output channel is more smooth, and the extraction efficiency is improved; and aromatic lamellae in the coal can be oxidized in situ, the methane adsorption capacity of the coal bed is reduced, the conversion of adsorbed gas into free gas is promoted, and a material basis is provided for continuous and efficient gas extraction.
The applicant carries out hydraulic fracturing (do not use) and adopts to the simple clear water the utility model discloses a hydraulic fracturing liquid carries out hydraulic fracturing and gas drainage respectively and has carried out hydraulic fracturing and gas drainage experiment, wherein ammonium persulfate aqueous solution is adopted to first component to the first component to adopting different ammonium persulfate mass concentration has carried out hydraulic fracturing and gas drainage respectively and has experimented, and the test result is as shown in figure 2. In fig. 2, a represents that the hydraulic fracturing fluid of the present invention is not used but only clean water is used; b represents that the first component adopts 2 percent of ammonium persulfate aqueous solution by mass concentration; c represents that the first component adopts 5 percent of ammonium persulfate by mass concentration; d represents that the first component adopts 10 percent of ammonium persulfate aqueous solution by mass concentration; e represents that the first component adopts 2 percent of ammonium persulfate by mass concentration, and the second component adopts a mixed solution of porous carbon containing copper ions and water, wherein the mass concentration of the porous carbon is 1 percent; f represents that the first component adopts an ammonium persulfate aqueous solution with the mass concentration of 5 percent, and the second component adopts a mixed solution of porous carbon containing copper ions and water, wherein the mass concentration of the porous carbon is 2 percent; g represents that the first component adopts 10 percent of ammonium persulfate aqueous solution by mass concentration, and the second component adopts the mixed solution of porous carbon containing copper ions and water, wherein the mass concentration of the porous carbon is 6 percent.
As can be seen from fig. 2, the best gas extraction effect is the case of group G, that is, the first component uses an ammonium persulfate aqueous solution with a mass concentration of 10%, and the second component uses a copper ion-containing porous carbon and water mixed solution, wherein the mass concentration of the porous carbon is 6%, and at this time, the gas extraction amount per minute reaches 95 liters. Although the gas extraction speed is lower in the F group, the speed of 78 liters per minute is still far higher than that in the other groups, and compared with the G group, the consumption of ammonium persulfate and two thirds of porous carbon is reduced by half, so that the cost is lower. Therefore, controlling the amount of ammonium persulfate to be between group G and group F (i.e., 5% to 10%) is the optimum range for the amount of ammonium persulfate in the present invention.
Also can see from fig. 2, as long as used the utility model provides a hydraulic fracturing fluid just can improve gas drainage speed. The coal body permeability increasing method for modifying the coal reservoir by persulfate corrosion is used for implementing hydraulic fracturing permeability increasing on the coal seam, the single-hole average gas extraction purity is obviously increased, and the permeability increasing effect is obviously improved. Pure water or single persulfate solution is used as the hydraulic fracturing fluid, the anti-reflection effect is poor, and the anti-reflection effect is obvious by using persulfate and porous carbon mixed solution containing transition metal ions as the hydraulic fracturing fluid.
The utility model discloses with the difference of acid anti-reflection: the permeability increasing method of hydrochloric acid, hydrofluoric acid and acetic acid is to dissolve carbonate rock mineral components and sulfides in coal, and although the quantity of pores in coal can be increased, the permeability increasing effect of pores and cracks is not great. The utility model discloses a hydraulic fracturing fluid can dissolve the organic matter of low molecular weight in the coal, not only increases hole quantity in the coal, also can improve the connectivity of hole in the coal, crack by a wide margin, adopts for gas to provide more advantage.
The utility model discloses with the anti-reflection difference of chlorine dioxide: although chlorine dioxide has strong oxidizing property, chlorine dioxide is extremely unstable, has extremely strong chemical corrosivity, is extremely sensitive to heat, vibration, impact and friction, is extremely easy to decompose and explode, is inconvenient to transport, can only be prepared on site, and is difficult to apply on site in a large scale. The utility model discloses well hydraulic fracturing liquid each composition then is at the equal safety and stability of the overall process of transportation, storage and use.
The utility model discloses with the difference of fenton's reagent anti-reflection (the strong oxidation system that hydrogen peroxide and ferrous ion constitute): hydrogen peroxide solution is easy to be decomposed fast, and especially decomposition rate is faster under high concentration to it has better strong oxidizability only to cause fenton's reagent just has been disposed in first several minutes, is difficult to store, must prepare on the spot, only has the effect in several minutes after getting into the coal seam, the utility model discloses a hydraulic fracturing fluid then need not prepare on the spot, can last after getting into the coal seam and react with the organic matter in the coal seam.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention may be modified or substituted with equivalents without departing from the spirit and scope of the invention, which should be construed as being limited only by the claims.
Claims (3)
1. The gas extraction system is characterized in that: the coal mining drilling device comprises fracturing drill holes and extraction drill holes, wherein the fracturing drill holes and the extraction drill holes are arranged between a coal seam top plate and a coal seam bottom plate, the fracturing drill holes are provided with fracturing affected areas in a coal seam, and the extraction drill holes are respectively arranged in the fracturing affected areas on the left side and the right side of one fracturing drill hole;
fracturing pipes are inserted into the fracturing drill holes, extraction pipes are respectively inserted into the extraction drill holes, openings for liquid to flow into are formed in the fracturing pipes in the fracturing drill holes, and openings for gas to flow out are formed in the extraction pipes in the extraction drill holes; the fracturing pipe extends downwards out of the coal bed bottom plate and is connected with a mixing container, the mixing container is provided with a first inlet, a second inlet and an outlet, the outlet of the mixing container is connected with the fracturing pipe, the first inlet of the mixing container is connected with a first component liquid supply device, and the second inlet of the mixing container is connected with a second component liquid supply device;
a fracturing pipe between the mixing container and the fracturing drill hole is connected with a pressure gauge and a discharge pipe, and the discharge pipe is provided with a discharge valve;
and each extraction pipe extends downwards out of the coal seam bottom plate and is connected with an extraction main pipe, the extraction main pipe is connected with a gas extraction device, an extraction main valve is arranged on the extraction main pipe, and each extraction pipe is provided with an extraction branch valve.
2. The gas extraction system of claim 1, wherein: the first component liquid supply device comprises a first component liquid supply box, the first component liquid supply box is connected with a first component liquid supply pump through a first component liquid outlet pipe, an outlet of the first component liquid supply pump is connected with a first inlet of the mixing container through a first component liquid supply pipe, and a first component liquid supply valve is arranged on the first component liquid supply pipe;
the second component liquid supply device comprises a second component liquid supply box, the second component liquid supply box is connected with a second component liquid supply pump through a second component liquid outlet pipe, an outlet of the second component liquid supply pump is connected with a second inlet of the mixing container through a second component liquid supply pipe, and a second component liquid supply valve is arranged on the second component liquid supply pipe.
3. The gas extraction system according to claim 2, wherein: and an ultrasonic vibration plate is arranged on the bottom wall of the second component liquid supply tank, and an ultrasonic generator is arranged on the ultrasonic vibration plate.
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| CN201921074948.6U CN210483691U (en) | 2019-07-10 | 2019-07-10 | Gas extraction system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259427A (en) * | 2019-07-10 | 2019-09-20 | 河南理工大学 | Hydrofrac fluid, gas drainage system and gas pumping method |
| CN114737938A (en) * | 2022-03-21 | 2022-07-12 | 重庆大学 | Coal seam ultrasonic activation staged fracturing device |
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2019
- 2019-07-10 CN CN201921074948.6U patent/CN210483691U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259427A (en) * | 2019-07-10 | 2019-09-20 | 河南理工大学 | Hydrofrac fluid, gas drainage system and gas pumping method |
| CN114737938A (en) * | 2022-03-21 | 2022-07-12 | 重庆大学 | Coal seam ultrasonic activation staged fracturing device |
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