CN116641749A - An integrated system and method for efficient utilization of underground gas and gas drainage - Google Patents

Abstract

The application discloses an underground gas efficient utilization and gas extraction integrated system and method, and relates to the technical field of energy system optimization. The method comprises the following steps: starting the burner by introducing a certain amount of air and gas mixture; conveying part of the high-temperature flue gas to a steam turbine for power generation; converting part of the flue gas into carbon dioxide, and simultaneously injecting the carbon dioxide and the inorganic salt solution into a coal bed; displacing the gas and promoting gas extraction, wherein the extracted gas is used for combustion, so that a closed-loop emission reduction mode is formed. The system also comprises an underground gas power generation system, a heat injection system, a liquid injection system, a gas extraction system, an underground power supply system and an independent ventilation system. The application effectively solves the problems of low exploitation efficiency, easy leakage, explosion and other risks in the gas exploitation process.

Description

An integrated system and method for underground gas efficient utilization and gas drainage

technical field

The invention relates to the technical field of energy system optimization, in particular to an integrated system and method for efficient underground gas utilization and gas drainage.

Background technique

Coal is an important part of my country's energy composition. According to statistics, by the end of 2021, my country's coal resource reserves will be 207.885 billion tons. Coal and gas go hand in hand. Gas is indispensable when mining coal mines. Coal mine gas is also called coal seam Gas, whose main combustible component is methane; gas is one of the main sources of coal mine accidents such as coal mine gas explosions, coal and gas outbursts, etc. At the same time, gas is also a kind of clean energy. Cubic meters, the development and utilization of gas can not only realize the direct economic benefits of "turning waste into wealth", but also achieve the purpose of energy saving and emission reduction.

Gas drainage is the main way to reduce gas disasters in coal mines, realize gas utilization and optimize energy structure. For the gas drainage work, China puts forward the guideline of "draining first, then mining, exhausting as much as possible, and using it to promote gas extraction" to guide its development; most coal mines in China are underground coal mines, and the main drainage technology used is underground drilling Drainage technology; however, conventional drainage technology is difficult to effectively reduce the gas content in coal seams, mainly because about 20% of the gas is stored in the coal seam in the form of free state, while about 80% of the gas is in the form of adsorbed state Stored in the coal seam, the free state means that the gas exists in the cracks and pores of the coal body or surrounding rock in a free gas state, and the adsorption state means that the free gas molecules are tightly adsorbed on the surface of the pores under the action of the gravitational force of the solid molecules on the surface of the pores. On the pore wall of the coal body, a thin adsorption layer is formed. Conventional drainage can only extract the free gas in the cracks and pores, and most of the adsorbed gas in the coal body cannot be discharged. In addition, during the gas extraction process, the gas will release the coal slag, coal powder and water vapor in the coal seam. Such impurities are brought out, causing blockage and corrosion of pipelines or air pumps. Therefore, in the process of underground gas extraction in coal mines, the risk of gas disasters is relatively high; , high stress, high gas, strong adsorption, low permeability and low gas permeability, coupled with complex geological conditions, severely restrict the safe and efficient production and use of coal and gas. With the increase of mining depth, the coal seam The ground stress will also increase, the air permeability will be further reduced, and the amount of gas gushing will also be increased, thereby increasing the risk of mine mining and the difficulty of gas drainage.

Contents of the invention

The purpose of this section is to outline some aspects of embodiments of the invention and briefly describe some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and titles of this application, to avoid obscuring the purpose of this section, abstract and titles, and such simplifications or omissions should not be used to limit the scope of the invention.

In view of the above-mentioned existing gas mining process, the mining efficiency is not high, and risks such as leakage and explosion are prone to occur, so the present invention is proposed.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solution: an integrated method of underground gas efficient utilization and gas drainage, comprising the following steps:

S1: start the burner by feeding a certain amount of air and gas mixture;

S2: Send part of the high-temperature flue gas to the steam turbine for power generation;

S3: convert part of the flue gas into carbon dioxide, inject carbon dioxide and inorganic salt solution into the coal seam at the same time;

S4: Displace gas and promote gas extraction, and the extracted gas is used for combustion to form a closed-loop emission reduction model.

In order to solve the above technical problems, the present invention provides the following technical solutions: an integrated system for efficient utilization of underground gas and gas drainage, which is applied to the above-mentioned integrated method for efficient utilization of underground gas and gas drainage. The integrated system of utilization and gas drainage includes: underground gas power generation system, heat injection system, liquid injection system, gas drainage system, underground power supply system and independent ventilation system.

As a preferred solution described in the integrated system of efficient utilization of underground gas and gas drainage in the present invention, wherein: the air supply system and the coal mine gas supply system in the gas power generation system are connected to the gas supply system through the intake pipe and the extraction pipe respectively. The mixing chamber is connected; the ports of the burner are respectively connected with the waste heat boiler, the water storage tank and the circulating water treatment system through pipelines; the circulating water treatment system includes the waste heat boiler, the steam turbine connected with the waste heat boiler, the condenser and the water storage tank; The heat injection system includes a plurality of gas injection holes drilled into the coal seam from the well, and all the gas injection holes are connected to the discharge end of the gas treatment chamber through the gas injection pipe and the booster pump; the gas drainage system includes a plurality of gas injection holes. All the drainage holes are connected to the front end of the gas mixing chamber through drainage pipes and gas extraction pumps; the liquid injection system includes a plurality of liquid injection holes drilled into the coal seam from the well, All liquid injection holes are connected with inorganic salt solution storage tanks through liquid injection pipes and booster pumps.

As a preferred solution of the integrated system of efficient utilization of underground gas and gas drainage in the present invention, wherein: the underground power supply system includes the electric energy generated by the steam turbine and transmitted to the temporary refuge chamber, lighting lamps, and other utilities through power lines. electrical equipment and power grid; the independent ventilation system includes an air inlet and a return fan; the air inlet and the return air outlet of the ventilation system are respectively located on both sides of the coal mine, and the positive pressure of the surface air is transported into the air inlet by the inlet fan, The mine is ventilated with a suitable air volume, the ventilated air flows into the return air outlet, and the ventilated air is drawn out under negative pressure through the return fan; the liquid injection pipe is made of high temperature resistant and corrosion resistant materials; the Both the power generation room and the temporary refuge chamber are equipped with thickened steel explosion-proof doors that are super-strong and overpressure-resistant, and protective airtight walls that are pressure-resistant, high-temperature resistant, and explosion-proof.

Another problem to be solved by the present invention is that in the gas extraction process, the gas suction pump lacks the function of filtering coal slag and water vapor, which may easily cause equipment blockage, and the present invention is proposed.

In order to solve the above technical problems, the present invention provides the following technical solutions: a filter device for cinder and water vapor in gas gas, characterized in that it is applied to the above-mentioned integrated system for efficient utilization of underground gas and gas extraction, and the filter device includes: The delivery unit includes a gas delivery pipeline and an auxiliary pipeline connected to one side of the gas delivery pipeline; the filter unit includes a filter cover and an absorption cover arranged in sequence in the said gas delivery pipeline; and a collection unit includes a sealing plate and a collection box, the sealing plate is mated and plugged into the side wall in the vertical direction of the auxiliary pipeline, the collection box is arranged at the bottom end of the sealing plate, and can cooperate to close the opening of the auxiliary pipeline; the driving assembly includes a driving motor , a driven part, a belt and a steering part, the driven part is provided with multiple groups, the output shaft of the drive motor is connected with the driven part, the output shaft of the driven part is engaged with the filter unit, and the belt Sleeved on the follower, one end of the steering member is connected with the follower through a belt, and the other end is movably connected with the absorbing cover.

As a preferred solution of the coal slag and water vapor filter device in the gas gas of the present invention, wherein: the two ends of the gas transmission pipeline are open, which are respectively the input port and the output port, and the side wall of the gas transmission pipeline is provided with a lower leakage hole ; The input port is provided with a tapered polymer piece towards the inside of the pipeline; the auxiliary pipeline includes a slope section pipeline and a vertical section pipeline, and one end of the slope section pipeline with a larger size is connected to the lower drain hole, and the other end is connected to the vertical section pipeline. Straight pipe connections.

As a preferred solution of the coal slag and water vapor filter device in the gas gas of the present invention, wherein: the filter cover includes a fixed shell, a filter shell, a rotating shell and a leak-proof baffle; the fixed shell cooperates with the inner wall of the gas pipeline connection, its outer wall is open, the filter shell is a hemispherical structure, the round edge is connected with the fixed shell, and filter holes are evenly opened on the filter shell; the rotating shell includes a shell, and the shell is also a hemispherical structure , the size of the spherical outer wall is the same as the size of the inner wall of the filter housing, and the axis is located on the same straight line. The housing is also uniformly provided with adjustment holes, and the diameter of the adjustment holes is larger than the filter hole; the housing axis is also provided with A rotating shaft, the end of the rotating shaft away from the housing is provided with a first bevel gear groove, the first bevel gear groove is connected to the top end of the output shaft of the follower; the leak-proof baffle is connected to the opening of the fixed shell, An inclined surface is provided at the end away from the fixed shell, and the inclined surface is parallel to the inclined surface of the pipeline in the inclined section.

As a preferred solution of the coal slag and water vapor filter device in the gas gas of the present invention, wherein: the absorption cover is arranged on the inner wall of the gas pipeline near the output port, including a connecting shell, absorbent cotton and extruded parts; The inner wall of the connecting shell is provided with an extruding boss, and the middle part of the extruding boss is open, forming a water squeezing area with the connecting shell, and the water-absorbing cotton is placed in the water squeezing area; The shell has an opening at one end of the squeeze area, the outer diameter of which is equal to the inner diameter of the connecting shell. piece.

As a preferred solution of the coal slag and water vapor filter device in the gas gas of the present invention, wherein: the outer wall of the vertical section pipeline is provided with a placement bump, and the other side outer wall is provided with a limit bump, so The top of the placement bump is connected to the slope side wall of the slope section pipeline; a placement layer is provided inside the placement bump, and the placement layer is sequentially connected to the placement bump, the vertical section pipeline and the limit bump, and the sealing The plates are slidably arranged in the placement layer; the two ends of the sealing plate parallel to the axis of the gas pipeline are provided with moving plates, and the moving plates are uniformly provided with clamping holes; One end is symmetrically provided with a gear groove, and the gear groove corresponds to the moving plate, and a plurality of sets of gears are symmetrically rotated in it, and the gears are meshed and connected with the snap-in holes; the collection box includes a box body and a contact block, and the contact block The block is arranged symmetrically on the top of the box body, and the contact block is meshed with the gear.

As a preferred solution of the coal slag and water vapor filter device in gas gas of the present invention, wherein: the follower is arranged corresponding to the filter cover, including a turntable, a support platform and a support sleeve, and the support platform is fixedly connected to the gas transmission On the outer wall of the pipeline, the turntable is rotatably installed in the support platform, and its outer wall is connected to the belt in rotation, and the output shaft of the turntable is plugged into the support sleeve; the support sleeve is connected to the inner wall of the gas pipeline, and it points to the gas pipeline axis, and the outer wall of the support sleeve is also connected with a support frame, the other end of the support frame is provided with an axis sleeve, and the axis sleeve is sleeved on the rotating shaft; the steering member includes a steering shaft and a connecting plate, The middle part of one end of the connection plate is connected with the steering shaft, and the edge of the other end is provided with a protrusion, and the protrusion slides in the return-shaped slider; the gas pipeline is also provided on the inner wall between the steering piece and the inner wall absorption cover There is a sliding sleeve in which the push rod slides.

Beneficial effects of the present invention:

Through the filter unit set in the delivery unit, impurities such as coal slag and water vapor contained in the gas gas are filtered out, so as to achieve the purpose of collecting relatively clean gas, avoid impurities entering the air pump, and affect the operation of the equipment, and reduce to a certain extent In the operation steps of secondary purification, the collection unit can be opened when the air pump is working normally, and the delivery unit is sealed synchronously to avoid gas leakage. The burner can adopt the corresponding burner type according to the concentration of the extracted gas, such as porous media burner, internal combustion engine and MLID burner, etc., and has a wide range of applications. Different types of condensers (water-cooled, air-cooled or evaporative) can be used, and can be selected according to different positions; the steam after work is recycled to effectively save water resources. Various types of inorganic salt solution can be used, such as sodium carbonate, potassium carbonate and other solutions, which can be selected according to the actual situation; injecting them into the coal seam can effectively improve the air permeability of the coal seam. The tail gas of the burner is converted into carbon dioxide and injected into the coal seam after treatment. The carbon dioxide replaces the gas and stores it in the coal seam. loss, reducing the risk of gas disasters and forming a good closed-loop emission reduction work. The invention realizes the multi-stage utilization of the waste heat of the burner, which is used for power generation, preheating gas, heating and water supply for personnel. It has high energy utilization efficiency. The invention realizes the multi-stage utilization of electric energy, and the generated electric energy is mainly used by underground temporary refuge chambers, lighting lamps and other electric equipment through the transmission line, and is transmitted to the power grid through the auxiliary well.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort. in:

Fig. 1 is a schematic flow chart of the integrated system and method for efficient utilization of underground gas and gas extraction according to the present invention.

Fig. 2 is a system schematic diagram of an integrated system and method for efficient utilization of underground gas and gas drainage according to the present invention.

Fig. 3 is a schematic diagram of the overall structure of the coal slag and water vapor filter device in the gas gas of the present invention.

Fig. 4 is a cross-sectional view of the gas transmission pipeline of the coal slag and water vapor filter device in the gas gas of the present invention.

Fig. 5 is a schematic diagram of the structure of the sealing plate of the coal slag and water vapor filter device in the gas gas of the present invention.

Fig. 6 is a schematic structural diagram of the collection box of the coal slag and water vapor filter device in the gas gas of the present invention.

Fig. 7 is a partial structural schematic diagram of the filter device for coal slag and water vapor in the gas gas of the present invention.

Fig. 8 is a schematic diagram of the connection shell structure of the coal slag and water vapor filter device in the gas gas of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. By analogy, the present invention is therefore not limited to the specific examples disclosed below.

Second, "one embodiment" or "an embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. "In one embodiment" appearing in different places in this specification does not all refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

Secondly, the present invention is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional view showing the structure of the device will not be partially enlarged according to the general scale, and the schematic diagram is only an example, and it should not be used here. Limit the scope of protection of the present invention. In addition, the three-dimensional space dimensions of length, width and depth should be included in actual production.

Example 1

Referring to Fig. 1, it is an embodiment of the present invention, which provides an integrated method for efficient utilization of underground gas and gas drainage, as shown in Fig. 1 , including the following steps:

S1: start the burner by feeding a certain amount of air and gas mixture;

S2: Send part of the high-temperature flue gas to the steam turbine for power generation;

S3: convert part of the flue gas into carbon dioxide, inject carbon dioxide and inorganic salt solution into the coal seam at the same time;

S4: Displace gas and promote gas extraction, and the extracted gas is used for combustion to form a closed-loop emission reduction model.

The foregoing is a schematic scheme of an integrated method for efficient underground gas utilization and gas drainage in this embodiment. It should be noted that the technical solution for the integrated system of efficient underground gas utilization and gas drainage is the same concept as the above-mentioned technical solution for the integrated method of efficient utilization of underground gas and gas drainage. For details not described in detail in the technical solution of the integrated system of gas drainage, please refer to the description of the technical solution of the above-mentioned integrated method of efficient utilization of underground gas and gas drainage.

Fig. 2 is a schematic structural diagram of an integrated system for efficient underground gas utilization and gas drainage provided by the present invention. This embodiment is applicable to the integrated method of efficient underground gas utilization and gas drainage.

Referring to Fig. 2, the integrated system of underground gas efficient utilization and gas drainage in this embodiment includes:

Underground gas power generation system, heat injection system, liquid injection system, gas drainage system, underground power supply system and independent ventilation system.

In the gas power generation system, the air supply system and the coal mine gas supply system are respectively connected to the gas mixing chamber 3 through the intake pipe 2 and the extraction pipe 22; The systems are connected; the circulating water treatment system includes a waste heat boiler 10 , a steam turbine 9 connected to the waste heat boiler 10 , a condenser 11 and a water storage tank 12 .

Specifically, the heat injection system includes a plurality of gas injection holes 27 drilled into the coal seam 26 from the well 23 , and all the gas injection holes 27 are connected to the discharge end of the gas treatment chamber 13 through the gas injection pipe 21 and the No. 1 booster pump 20 .

The gas extraction system includes a plurality of extraction holes 28 drilled into the coal seam 26 from the well 23, and all the extraction holes 28 are connected to the front end of the gas mixing chamber 3 through the extraction pipe 22 and the gas extraction pump 19.

Specifically, the liquid injection system includes a plurality of liquid injection holes 41 drilled into the coal seam 26 from the well, and all the liquid injection holes 41 are connected to the inorganic salt solution storage tank 38 through the liquid injection pipe 40 and the No. 2 booster pump 39 .

The underground power supply system includes that the electric energy generated by the steam turbine 9 is transmitted to the temporary refuge chamber 17, the lighting lamp 34, other electrical equipment 14 and the power grid 30 through the transmission line.

The independent ventilation system comprises air intake fan 33 and return fan 35.

The air inlet 32 and the return air outlet 37 of the ventilation system are respectively located on both sides of the coal mine, and the positive pressure of the surface air is sent to the air inlet 32 through the inlet fan 33, and the mine 18 is ventilated with a suitable air volume, and the ventilated air flows into the return air outlet 37 Inside, through the return fan 35, the negative pressure of the ventilated air is drawn out.

The liquid injection pipe 40 is made of high temperature resistant and corrosion resistant materials.

The power generation room 1 and the temporary refuge chamber 17 are all equipped with super-strong anti-overpressure thickened steel explosion-proof doors and pressure-resistant, high-temperature-resistant and explosion-proof protective airtight walls.

It should be noted that because calcite will fill in the cracks of the coal seam and reduce the air permeability of the coal seam. The main component of calcite is calcium carbonate. Adding inorganic salt solution to dissolve calcium carbonate can improve the air permeability of the coal seam. Therefore, this index is decisive. index.

Example 2

Referring to Figures 1 and 2, an embodiment of the present invention provides an integrated method and system for efficient utilization of underground gas and gas drainage. In order to verify its beneficial effect, scientific demonstration is carried out through specific implementation methods and implementation effects.

This embodiment is specifically as follows:

Step 1, before the work starts, open the ventilation system, and send the surface air to the air inlet 32 under positive pressure through the air inlet fan 33, and perform ventilation work on the mine 18 with a suitable air volume, and the ventilated air flows into the return air outlet 37, and passes through the return fan 35. Draw out the negative pressure of the ventilated air.

Step 2. During operation, a certain amount of air/gas mixture is first introduced into the burner for oxidative combustion reaction, and the high-temperature flue gas generated by the burner is transported to the waste heat boiler 10 and the water storage tank 12 .

Step 3, the waste heat boiler 10 extracts the waste heat after combustion to generate steam, and part of the steam is delivered to the heat supply pipe jacket 4 to preheat the air/gas mixture before entering the burner. Part of the steam is transported to the steam turbine 9 for power generation, and the power generation room 1 is equipped with a thickened steel explosion-proof door with super anti-overpressure and a protective airtight wall resistant to pressure, high temperature and explosion. The steam after work is returned to the waste heat boiler 10 and the water storage tank 12 through the condenser 11 for recycling; the condenser 11 adopts a corresponding type according to different actual conditions, such as water-cooled, air-cooled or evaporative condensers. The generated electric energy is mainly used by the temporary refuge chamber 17 , lighting lamp 34 and other electrical equipment 14 through the transmission line, and is transmitted to the grid 30 through the auxiliary well 31 . Temporary refuges are used for emergencies, and people in distress can quickly hide inside and wait for external rescue. The chamber is equipped with super-strong anti-overpressure thickened steel explosion-proof doors and pressure-resistant, high-temperature-resistant and explosion-proof protective airtight At the same time, it provides facilities such as oxygen, food, water, and first-aid kits necessary for survival; lighting is used for underground lighting; other electrical equipment includes coal shearers, excavators, trucks, and various transport aircraft.

Step 4, the high-temperature flue gas passing through the waste heat boiler 10 loses part of its heat to become medium-temperature flue gas, which enters the water storage tank 12 to generate hot water, which is transported to the water separator 16 to supply water and heat to the temporary refuge chamber 17 .

Step 5, the medium-temperature flue gas passing through the water storage tank 12 loses part of its heat, becomes low-temperature flue gas and enters the gas treatment chamber 13, and the carbon dioxide produced in the gas treatment chamber 13 is pressurized by the No. The gas injection hole 27 drilled into the coal seam 26 by the well 23 is injected into the coal seam 26 , and carbon dioxide is sealed in the coal seam 26 instead of gas.

Step 6, simultaneously the inorganic salt solution in the inorganic salt solution storage tank 38 is pressurized by No. 2 booster pump 39, and injected into the coal seam 26 through the liquid injection pipe 40 from the well 23 into the liquid injection hole 41 of the coal seam 26, at the same time Under the action of ion reaction, calcium carbonate will be dissolved in the inorganic salt solution, and the water and gas generated during the dissolution process and the released heat will promote the desorption of the coal seam and convert the adsorbed gas into a free state. The inorganic salt solution adopts solutions such as sodium carbonate, potassium carbonate and ammonium hydroxide; the injection pipe 40 is made of high temperature resistant and corrosion resistant materials.

Step 7: The flue gas and the inorganic salt solution jointly displace the gas and promote its extraction. The coal mine gas extracted by the gas extraction pump 19 is sent into the gas mixing chamber 3 through the extraction pipe 22, and is transmitted through the intake pipe 2. According to the different gas extraction concentrations measured by the gas concentration detector 29, the corresponding burner type is selected for combustion, such as the porous media burner 5, the internal combustion engine 6 and the MLID burner 7, etc., so as to form a closed-loop reduction row mode.

Example 3

With reference to Fig. 3, it is the third embodiment of the present invention, and what this embodiment is different from the second embodiment is to provide a kind of coal slag and water vapor filter device in the gas gas: this device comprises delivery unit 100, comprises gas pipeline 101 and the auxiliary pipeline 102 connected to the gas pipeline 101 side; the outlet of the gas pipeline 101 is connected with the air pump, and the inlet is connected with the air pipeline to achieve the purpose of fixing the device at the inlet of the air pump; the filter unit 200 includes In order to cooperate with the filter cover 201 and the absorption cover 202 arranged in the gas pipeline 101, the preferred filter cover 201 in this embodiment is provided with two groups, one group of the absorption cover 202, and the two groups of filter covers 201 can effectively reduce the escape rate of coal slag. And; the collection unit 300 includes a sealing plate 301 and a collection box 302, the sealing plate 301 is mated and plugged into the side wall in the vertical direction of the auxiliary pipeline 102, the collection box 302 is arranged at the bottom of the sealing plate 301, and can cooperate to close the auxiliary pipeline 102 openings;

During use, the collection box 302 is inserted under the auxiliary pipeline 102, and the collection box 302 is pulled out according to the set time to pour out the internal impurities. During the extraction process, the sealing plate 301 will block the opening of the auxiliary pipeline 102 to avoid The gas in the gas pipeline 101 leaks, and when the collection box 302 is reinserted into the auxiliary pipeline 102, the sealing plate 301 will reset, and the opening will be exposed, allowing the cinders to fall into the collection box 302.

The drive assembly 400 includes a drive motor 401, a driven part 402, a belt 403 and a steering part 404. The driven part 402 is provided with multiple groups, the output shaft of the drive motor 401 is connected with the driven part 402, and the output shaft of the driven part 402 Mesh connection with the filter unit 200 , the belt 403 is sleeved on the driven member 402 , one end of the steering member 404 is connected with the driven member 402 through the belt 403 , and the other end is movably connected with the absorbing cover 202 .

All the other structures are identical to those of Embodiment 2.

During use, the drive motor 401 is started at regular intervals to drive the driven member 402 to rotate, thereby driving the internal structure of the filter cover 201 to move to achieve the purpose of scraping off residual cinders. Driven by the belt 403, the steering member 404 will also rotate, thereby extruding Absorb the water-absorbing material in the cover 202, discharge the water, and reduce the saturation of the water-absorbing material.

Example 4

Referring to Figures 3 to 8, it is the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that it also includes: openings at both ends of the gas pipeline 101, which are respectively the input port 101a and the output port 101b, The side wall of the gas transmission pipeline 101 is provided with a lower leakage hole 101c, and the lower leakage hole 101c is used to discharge coal slag or water vapor downward; the input port 101a is provided with a conical aggregate 101a-1 facing the inside of the pipeline to concentrate the gas entering and exiting. In the filter housing 201; the auxiliary pipeline 102 includes a slope section pipeline 102a and a vertical section pipeline 102b, and the larger end of the slope section pipeline 102a is connected to the lower leakage hole 101c, and the other end is connected to the vertical section pipeline 102b.

The filter cover 201 includes a fixed shell 201a, a filter shell 201b, a rotating shell 201c and a leak-proof baffle 201d; the fixed shell 201a is connected with the inner wall of the gas pipeline 101, and its outer wall is open, and the filter shell 201b is a hemispherical structure with rounded edges and fixed The shell 201a is connected, and the filter shell 201b is evenly opened with filter holes 201b-1, and the aperture of the filter hole 201b-1 meets the requirements of dust filtration; the rotating shell 201c includes a shell 201c-1, and the shell 201c-1 is also a hemispherical structure. The spherical structure mainly has a converging effect, and can also buffer the impact force brought by the gas. The size of the spherical outer wall is the same as that of the inner wall of the filter housing 201b, and the axis is located on the same straight line. The housing 201c-1 is evenly equipped with adjustment holes 201c -1a, the diameter of the adjustment hole 201c-1a is larger than that of the filter hole 201b-1; the axis of the housing 201c-1 is also provided with a rotating shaft 201c-2, and the end of the rotating shaft 201c-2 away from the housing 201c-1 is provided with a first cone Type gear groove 201c-2a; leakproof baffle plate 201d is connected with the opening of fixed shell 201a, and its end away from fixed shell 201a is provided with an inclined surface, and the inclined surface is parallel to the inclined surface of slope section pipeline 102a.

The absorbing cover 202 is arranged on the inner wall of the gas pipeline 101 near the output port 101b, and includes a connecting shell 202a, absorbent cotton 202b and extruding parts 202c; the inner wall of the connecting shell 202a is provided with extruding bosses 202a-1, The middle part of the table 202a-1 is open, and the connecting shell 202a forms a water squeezing area A1, and the absorbent cotton 202b is placed in the water squeezing area A1 in cooperation; The outer diameter is equal to the inner diameter of the connecting shell 202a, the middle part of the extrusion part 202c is open, and the end away from the connecting shell 202a is also connected with a push rod 202c-1, and the other end of the push rod 202c-1 is connected with a return-shaped sliding block 202c-2.

One side outer wall of the vertical section pipeline 102b is provided with a placement bump 102b-1, and the other side outer wall is provided with a limit bump 102b-2, and the top of the placement bump 102b-1 is connected to the slope side wall of the slope section pipeline 102a There is a placement layer B1 inside the placement bump 102b-1, and the placement layer B1 is sequentially connected to the placement bump 102b-1, the vertical section pipe 102b and the limit bump 102b-2, and the sealing plate 301 is arranged on the placement layer in cooperation with sliding In B1, when the sealing plate 301 is normally plugged in to seal the opening of the vertical pipe 102b, one end of the sealing plate 301 will be stuck in the limiting protrusion 102b-2, and the other end will still stay in the placement protrusion 102b-1, and The two sides are clamped in the side wall of the vertical section pipeline 102b to ensure the sealing; the two ends of the sealing plate 301 parallel to the axis of the gas pipeline 101 are provided with a moving plate 301a, and the moving plate 301a is evenly opened with a clamping hole 301a -1; The end of the placement bump 102b-1 away from the slope section pipeline 102a is symmetrically provided with a gear groove 102b-1a, and the gear groove 102b-1a corresponds to the moving plate 301a, and there are multiple groups of gears C1 symmetrically rotated inside it, and the gears C1 and The clamping hole 301a-1 is meshed and connected; the collection box 302 includes a box body 302a and a contact block 302b, the contact block 302b is symmetrically arranged on the top of the box body 302a, and the contact block 302b is meshed with the gear C1; the contact block 302b meshes with the gear C1 from below The connection makes the gear C1 rotate, and then drives the moving plate 301a to move, realizing the horizontal movement of the sealing plate 301 .

The follower 402 is correspondingly arranged with the filter cover 201, and includes a rotating disk 402a, a supporting platform 402b and a supporting sleeve 402c. The supporting platform 402b is fixedly connected on the outer wall of the gas pipeline 101, and the rotating disk 402a is installed in the supporting platform 402b. 403 rotating connection, the output shaft of the turntable 402a is plugged into the support sleeve 402c; the support sleeve 402c is connected with the inner wall of the gas pipeline 101, which points to the axis of the gas pipeline 101, and the outer wall of the support sleeve 402c is also connected with a support frame 402c-1 , the other end of the support frame 402c-1 is provided with a shaft sleeve 402c-1a, and the shaft sleeve 402c-1a is sleeved on the rotating shaft 201c-2.

The steering member 404 includes a steering shaft 404a and a connecting disc 404b. The middle part of one end of the connecting disc 404b is connected to the steering shaft 404a, and the edge of the other end is provided with a bump 404b-1, and the bump 404b-1 slides in the return-shaped slider 202c-2; The air pipeline 101 is also provided with a sliding sleeve 101d on the inner wall between the steering member 404 and the inner wall absorbing cover 202, and the push rod 202c-1 slides in the sliding sleeve 101d.

All the other structures are identical to those of Embodiment 3.

Referring to Figures 1 and 2 together, during use, the driving assembly 400 drives the driven member 402 to rotate, and under the condition that the first bevel gear groove 201c-2a meshes with the output shaft bevel gear of the driven member 402, the rotating shell 201c rotates to scrape The coal slag remaining on the fixed shell 201a through the aperture can effectively ensure the cleanliness of the fixed shell 201a, and the outer wall of the rotating shell 201c in contact with the fixed shell 201a can be provided with a brush structure for cleaning the filter hole 201b-1.

Further, because of the drive of the belt 403, the steering member 404 will also rotate, and the steering shaft 404a drives the connection plate 404b to rotate, and the protrusion 404b-1 on the connection plate 404b is in the return-shaped slider 202c-2, and the push rod 202c -1 slides in the sliding sleeve 101d and is limited by the sliding sleeve 101d, so the entire extruded part 202c will reciprocate along the central axis of the air pipeline 101 to squeeze the absorbent cotton 202b to discharge the moisture inside.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation, although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. An integrated method for underground gas efficient utilization and gas drainage, characterized in that: comprising the following steps: Introduce a certain amount of air and gas mixture to start the burner; Send part of the high-temperature flue gas to the steam turbine for power generation; Part of the flue gas is converted into carbon dioxide, and the carbon dioxide and inorganic salt solution are simultaneously injected into the coal seam; Displace gas and promote gas extraction, and the extracted gas is used for combustion to form a closed-loop emission reduction model. 2. An integrated system of efficient underground gas utilization and gas drainage, characterized in that it is applied to the integrated method of efficient underground gas utilization and gas drainage as claimed in claim 1, the efficient utilization of underground gas and gas drainage The integrated system includes: Underground gas power generation system, heat injection system, liquid injection system, gas drainage system, underground power supply system and independent ventilation system. 3. The underground gas efficient utilization and gas drainage integrated system according to claim 2, characterized in that: the air supply system and the coal mine gas supply system in the gas power generation system pass through the air intake pipe (2) and the gas extraction system respectively. The extraction pipe (22) is connected to the gas mixing chamber (3); the ports of the burner are respectively connected to the waste heat boiler (10), the water storage tank (12) and the circulating water treatment system through pipelines; the circulating water treatment system includes the waste heat boiler (10), a steam turbine (9), a condenser (11) and a water storage tank (12) connected to the waste heat boiler (10); The heat injection system includes a plurality of gas injection holes (27) drilled into the coal seam (26) from the well (23), and all the gas injection holes (27) are connected with the gas injection pipe (21) and the No. 1 booster pump (20). The discharge ends of the gas processing chamber (13) are connected; The gas drainage system includes a plurality of drainage holes (28) drilled into the coal seam (26) from the well (23), and all the drainage holes (28) pass through the drainage pipe (22) and the gas drainage pump ( 19) Connected to the front end of the gas mixing chamber (3); The liquid injection system includes a plurality of liquid injection holes (41) drilled into the coal seam (26) from the well, and all the liquid injection holes (41) are connected with the liquid injection pipe (40) and the No. 2 booster pump (39). The inorganic salt solution storage tank (38) is connected. 4. The underground gas efficient utilization and gas drainage integrated system according to claim 3, characterized in that: the underground power supply system includes the electric energy generated by the steam turbine (9) and is transmitted to the temporary refuge chamber (17) through the transmission line ), lighting (34), other electrical equipment (14) and power grid (30); The independent ventilation system includes an inlet fan (33) and a return fan (35); The air inlet (32) and the return air outlet (37) of the ventilation system are respectively located on both sides of the coal mine, and the positive pressure of the surface air is delivered to the air inlet (32) through the air inlet fan (33), and the mine (18) is provided with a suitable air volume. The ventilation work, the ventilated air flows into the return air outlet (37), and the ventilated air is sucked out by negative pressure through the return fan (35); The liquid injection pipe (40) is made of high temperature resistant and corrosion resistant materials; Both the power generation room (1) and the temporary refuge chamber (17) are equipped with super-strong anti-overpressure thickened steel explosion-proof doors and pressure-resistant, high-temperature-resistant and explosion-proof protective airtight walls. 5. A coal slag and water vapor filtering device in gas gas, characterized in that it is applied to the integrated system of underground gas efficient utilization and gas drainage as described in any one of claims 2 to 4, and the filtering device includes: The delivery unit (100), arranged at the inlet of the gas extraction pipeline of the gas extraction system, includes a gas pipeline (101) and an auxiliary pipeline (102) connected to one side of the gas pipeline (101); A filtering unit (200), comprising a filtering cover (201) and an absorbing cover (202) arranged sequentially in the gas pipeline (101), and; The collection unit (300) includes a sealing plate (301) and a collection box (302), the sealing plate (301) is mated and plugged into the side wall in the vertical direction of the auxiliary pipeline (102), and the collection box (302) It is arranged at the bottom end of the sealing plate (301), and can cooperate to close the opening of the auxiliary pipe (102); The driving assembly (400) includes a driving motor (401), a driven part (402), a belt (403) and a steering part (404), the driven parts (402) are arranged in multiple groups, and the driving motor (401 ) is connected to the driven member (402), the output shaft of the driven member (402) is engaged with the filter unit (200), and the belt (403) is sleeved on the driven member (402), One end of the steering member (404) is connected to the driven member (402) through a belt (403), and the other end is movably connected to the absorbing cover (202). 6. The coal slag and water vapor filtering device in gas gas according to claim 5, characterized in that: the two ends of the gas transmission pipeline (101) are open, which are respectively the input port (101a) and the output port (101b), and the A lower leakage hole (101c) is opened on the side wall of the gas pipeline (101); The input port (101a) is provided with a conical aggregate (101a-1) facing the inside of the pipeline; The auxiliary pipeline (102) includes a slope section pipeline (102a) and a vertical section pipeline (102b). Segment pipeline (102b) connection. 7. The coal slag and water vapor filter device in gas gas according to claim 6, characterized in that: the filter cover (201) includes a fixed shell (201a), a filter shell (201b), a rotating shell (201c) and a leak-proof Baffle (201d); The fixed shell (201a) is mated with the inner wall of the gas pipeline (101), and its outer wall is open. The filter shell (201b) is a hemispherical structure with round edges connected to the fixed shell (201a). The filter shell (201b) ) are evenly opened with filter holes (201b-1); The rotating shell (201c) includes a shell (201c-1), the shell (201c-1) is also a hemispherical structure, the size of its spherical outer wall is the same as that of the inner wall of the filter shell (201b), and the axis is located at the same On the straight line, the housing (201c-1) is evenly provided with adjustment holes (201c-1a), and the diameter of the adjustment holes (201c-1a) is larger than that of the filter hole (201b-1); A rotating shaft (201c-2) is also arranged on the axis of the housing (201c-1), and a first bevel gear groove ( 201c-2a), the first bevel gear groove (201c-2a) is connected to the top end of the output shaft of the follower (402); The leak-proof baffle (201d) is connected to the opening of the fixed shell (201a), and an inclined surface is provided at the end away from the fixed shell (201a), parallel to the inclined surface of the slope section pipeline (102a). 8. The coal slag and water vapor filter device in gas gas according to claim 6 or 7, characterized in that: the absorption cover (202) is arranged on the inner wall of the gas pipeline (101) near the output port (101b) , including a connection shell (202a), absorbent cotton (202b) and an extruded part (202c); The inner wall of the connecting shell (202a) is provided with an extruding boss (202a-1), and the middle part of the extruding boss (202a-1) is open, forming a water squeezing area (A1) with the connecting shell (202a). Absorbent cotton (202b) is placed in the squeeze area (A1); The extruded part (202c) is fitted at the opening of one end of the connecting shell (202a) with the squeeze area (A1), its outer diameter is equal to the inner diameter of the connecting shell (202a), and the middle part of the extruding part (202c) is open A push rod (202c-1) is connected to the end far away from the connecting shell (202a), and a return-shaped slider (202c-2) is connected to the other end of the push rod (202c-1). 9. The filter device for coal slag and water vapor in gas gas according to claim 6 or 7, characterized in that: the outer wall of one side of the vertical pipe (102b) is provided with a placement bump (102b-1), and another A limiting protrusion (102b-2) is arranged on one side of the outer wall, and the top of the placement protrusion (102b-1) is connected to the slope side wall of the slope section pipeline (102a); There is a placement layer (B1) inside the placement bump (102b-1), and the placement layer (B1) is sequentially connected to the placement bump (102b-1), the vertical section pipe (102b) and the limit bump (102b-2), the sealing plate (301) is arranged in the placement layer (B1) in cooperation with sliding; The two ends of the sealing plate (301) parallel to the axis of the gas pipeline (101) are provided with a moving plate (301a), and the moving plate (301a) is uniformly provided with clamping holes (301a-1); The end of the placement projection (102b-1) away from the slope section pipe (102a) is symmetrically provided with a gear groove (102b-1a), and the gear groove (102b-1a) corresponds to the moving plate (301a) and is internally symmetrical Multiple sets of gears (C1) are provided for rotation, and the gears (C1) are meshed and connected with the clamping hole (301a-1); The collection box (302) includes a box body (302a) and a contact block (302b), the contact block (302b) is symmetrically arranged on the top of the box body (302a), and the contact block (302b) meshes with the gear (C1) connect. 10. The coal slag and water vapor filter device in gas gas according to claim 8, characterized in that: the follower (402) is arranged corresponding to the filter cover (201), including a turntable (402a) and a support table (402b) and a support sleeve (402c), the support platform (402b) is fixedly connected to the outer wall of the gas pipeline (101), the rotating disk (402a) is installed inside the support platform (402b), and its outer wall and the belt (403) rotate connected, the output shaft of the turntable (402a) is plugged into the support sleeve (402c); The support sleeve (402c) is connected with the inner wall of the gas transmission pipeline (101), which points to the axis of the gas transmission pipeline (101), and the outer wall of the support sleeve (402c) is also connected with a support frame (402c-1), the The other end of the support frame (402c-1) is provided with a shaft center sleeve (402c-1a), and the shaft center sleeve (402c-1a) is sleeved on the rotating shaft (201c-2); The steering member (404) includes a steering shaft (404a) and a connecting plate (404b). One end of the connecting plate (404b) is connected to the steering shaft (404a) in the middle, and a bump (404b-1) is provided on the edge of the other end. The bump (404b-1) slides inside the return-shaped slider (202c-2); The air pipeline (101) is also provided with a sliding sleeve (101d) on the inner wall between the steering piece (404) and the inner wall absorption cover (202), and the push rod (202c-1) is mounted on the sliding sleeve (101d) slide inside.