A secondary separation device for drilling gas and slag

Abstract

The present invention relates to a secondary separation device for drilling gas and slag, which belongs to the field of coal mine gas extraction. The device includes an air inlet, a dust removal box, an air outlet, a sewage outlet, a manual butterfly valve, a pneumatic butterfly valve, a liquid level observation window, an environmental observation window, and a support frame. The mixed gas in the borehole is discharged through a gas-slag separator or other gas collecting device installed at the borehole mouth, and the gas, dust, etc. discharged during the drilling construction process are drained through a negative pressure pipe through the air inlet to a dust removal box containing a certain amount of clean water. The air outlet is connected to the extraction pipeline, and impurities such as dust are filtered by clean water and precipitated at the bottom of the dust removal box. The cleaned gas flows out above the liquid surface through the air outlet and enters the extraction pipe, so as to achieve the effect of continuous closed-circuit cleaning of gas mixed with impurities in the drilling project, thereby reducing the dust concentration and gas concentration of the working surface, and eliminating the problems of blockage of the extraction pipeline and gas exceeding the limit. The present invention can be widely used in places such as extraction hole construction and water exploration hole construction.

Description

Technical Field

[0001] The invention belongs to the field of coal mine gas extraction and relates to a drilling gas and slag secondary separation device. Background Art

[0002] Gas is one of the important disasters that coal mining enterprises need to deal with. Gas directly discharged into the tunnel during the drilling process can easily cause gas exceeding the limit on the working face or even the entire mine. At present, each mine adds a gas-slag separator or a blowout preventer at the orifice during the drilling process to allow the gas to enter the extraction pipe directly. This prevents gas exceeding the limit to a certain extent, but coal powder enters the extraction pipe together with the gas, causing the extraction pipe to be blocked and thus affecting the extraction system. Although some workers clean the extraction pipe regularly and even install various slag removal devices on the extraction pipe, the effect is minimal and the actual problem is not fundamentally solved. The drilling gas secondary separation device of the present invention is to fundamentally solve the problem of coal powder entering the extraction pipe together with the gas and blocking the extraction pipe. The device uses water to filter the gas to clean the gas accompanied by coal powder and then connects it to the extraction pipe through the pipeline. The method of secondary separation of drilling gas can effectively prevent coal powder from entering the extraction pipeline, reduce the workload of workers, and play an extremely important role in drilling construction and improving extraction efficiency. Summary of the Invention

[0003] In view of this, an object of the present invention is to provide a drilling gas slag secondary separation device.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A drilling gas slag secondary separation device, the device includes a dust removal box, an air inlet, an air outlet, a sewage outlet, a liquid level observation window, a transparent cover, a pneumatic butterfly valve, a manual butterfly valve for the sewage outlet, a manual butterfly valve for the air outlet, a handle, a clamp, a transparent cover and a support frame;

[0006] A support frame is provided at the bottom of the dust removal box for supporting stability;

[0007] The bottom of the dust removal box is also provided with a sewage outlet, and the sewage outlet is provided with a sewage outlet manual butterfly valve;

[0008] The top side of the dust removal box is provided with two air outlets, and the cleaned and filtered gas enters the extraction pipe through the air outlets;

[0009] One of the two gas outlets is provided with a manually controlled butterfly valve, which is connected to the extraction pipe and the valve size is adjusted according to the amount of gas;

[0010] The other gas outlet is equipped with a pneumatic butterfly valve, which is connected to the extraction pipe. If the gas volume of the blowhole increases sharply by 5m3 / min, the pneumatic butterfly valve is fully opened, and the extraction pipeline continuously extracts the gas flowing into the device; when the gas pressure or concentration returns to below 1% of the normal value, the compressed air is controlled to close the pneumatic butterfly valve, and then the drilling of the next meter is carried out;

[0011] An air inlet is provided on the top side of the dust removal box and not on the same side as the two air outlets; during drilling construction, the hole-mouth gas-slag separator is connected to the air inlet through an air guide pipe, and the gas mixed with coal powder during the drilling process is introduced into the dust removal box below the liquid level;

[0012] A liquid level observation window is provided on the side of the dust removal box to determine the liquid level in the barrel;

[0013] A transparent cover is provided on the top of the dust removal box for observing the gas outflow state in the barrel and judging the gas inflow and outflow situation; the transparent cover is connected to the dust removal box through a clamp, and a handle is fixedly connected to the dust removal box and locked with the clamp for disassembly;

[0014] The manual butterfly valve at the sewage outlet and the manual butterfly valve at the air outlet are opened and closed mechanically; the pneumatic butterfly valve is connected via an air guide pipe and is opened and closed manually by controlling compressed air;

[0015] The dust removal box removes coal dust from the mixed gas through the water inside the box;

[0016] The device can separate the gas and drill cuttings discharged from the drilling in real time, and quickly complete the control of the pneumatic butterfly valve in combination with instructions to achieve closed-circuit separation of the drilling gas.

[0017] Optionally, the pneumatic butterfly valve opens according to the instruction, allowing the gas in the box to enter the extraction pipe.

[0018] Optionally, the three-dimensional structure is a cylinder, a cone, a cube or a cuboid.

[0019] Optionally, the depth of the gas guide tube inside the air inlet inserted into the liquid surface can be flexibly adjusted according to the gas outflow volume and the negative pressure of the extraction pipe.

[0020] Optionally, the sewage outlet is concave.

[0021] Optionally, the pneumatic butterfly valve, the manual butterfly valve for the sewage outlet and the manual butterfly valve for the air outlet can be replaced with electric valves.

[0022] The beneficial effects of the present invention are that it can be widely applied to various drilling constructions, has the functions of preventing working face gas from exceeding the limit, reducing dust concentration and eliminating blockage of extraction pipes, and is an indispensable important equipment for drilling construction and gas extraction in various mines.

[0023] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure markings: 1-dust removal box, 2-liquid level observation window, 3-support frame, 4-drain outlet, 5-manual butterfly valve for drain outlet, 6-manual butterfly valve for air outlet, 7-air outlet, 8-pneumatic butterfly valve, 9-handle, 10-clamp, 11-air inlet, 12-transparent cover. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0028] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] See also Figure 1 This is a secondary separation device for drilling gas. The device includes a dust removal box 1, an air inlet 11, an air outlet 7, a sewage outlet 4, a liquid level observation window 2, a transparent cover, a pneumatic butterfly valve 8, a manual butterfly valve for the sewage outlet 5, a manual butterfly valve for the air outlet 6, a handle 9, a clamp 10, a transparent cover 12, and a support frame 3.

[0031] The dust removal box is a closed three-dimensional structure consisting of a transparent cover 12 and a stainless steel cylinder;

[0032] Two air inlets 11 are provided directly behind the dust removal box, through which the gas mixed with coal powder discharged during the drilling process is introduced into the dust removal box through the air duct;

[0033] There is an air outlet 7 on each side of the dust removal box, which is connected to the extraction pipe through the air guide pipe to introduce the cleaned gas into the extraction pipe;

[0034] The bottom of the dust removal box is concave in design and is provided with a sewage outlet 4, which can be connected to a pipeline to discharge the dirt deposited in the box;

[0035] There is a liquid level observation window 2 in the front of the box, which can be used to observe the situation inside the dust removal box at any time;

[0036] The manual butterfly valve 5 at the sewage outlet, the manual butterfly valve 6 at the air outlet and the pneumatic butterfly valve 8 are connected to the pipes through threads;

[0037] The liquid level observation window 2 is connected and sealed to the dust removal box body by using a sealing gasket and threaded sealing method;

[0038] The transparent cover 12 and the dust removal box are connected and sealed by a clamp 10;

[0039] The support frame 3 and the handle 9 are connected to the dust removal box by welding;

[0040] Before use, the dust collector is filled with water to a certain level. During drilling, the gas mixed with pulverized coal removed during the drilling process is introduced into the dust collector through a gas-slag separator or other gas collection chamber at the borehole opening. This gas mixed with pulverized coal in the dust collector enters below the liquid level, and the liquid level is determined by the negative pressure in the extraction pipe. The air outlets on both sides of the dust collector are connected to the extraction pipe through air guide pipes. The extraction speed is controlled by adjusting the opening and closing of the manual and pneumatic butterfly valves at the air outlets. The dust collector's internal conditions are monitored through the liquid level observation window. If excessive pulverized coal is deposited in the dust collector, the manual drain valve can be opened to remove the waste and then refill with water.

[0041] The opening and closing of the pneumatic butterfly valve at the gas outlet can be manually controlled according to the amount of gas gushing out of the borehole and the gas concentration.

[0042] The dust collector has two air inlets at the rear. Gas mixed with pulverized coal enters the dust collector below the liquid level through the inlets. After filtration, cleaning, and separation, the gas enters the negative pressure extraction pipe through the outlet. The dust collector can be shaped in a variety of ways, including cubes, rectangular blocks, cones, and cylinders. The size of the dust collector can be tailored to the actual gas levels in the mine. The air inlets and outlets typically use pagoda joints, with diameters ranging from DN50 to DN98 mm.

[0043] The bottom of the dust removal box is designed to be concave; the sewage outlet is placed at the concave bottom and is controlled by a manual butterfly valve. The sewage outlet should be located at a height of more than 100 mm from the ground.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A drilling gas slag secondary separation device, characterized by: The device includes a dust removal box, an air inlet, an air outlet, a sewage outlet, a liquid level observation window, a transparent cover, a pneumatic butterfly valve, a manual butterfly valve for the sewage outlet, a manual butterfly valve for the air outlet, a handle, a clamp, a transparent cover and a support frame; A support frame is provided at the bottom of the dust removal box for supporting stability; The bottom of the dust removal box is also provided with a sewage outlet, and the sewage outlet is provided with a sewage outlet manual butterfly valve; The top side of the dust removal box is provided with two air outlets, and the cleaned and filtered gas enters the extraction pipe through the air outlets; One of the two gas outlets is provided with a manually controlled butterfly valve, which is connected to the extraction pipe and the valve size is adjusted according to the amount of gas; The other gas outlet is equipped with a pneumatic butterfly valve, which is connected to the extraction pipe. If the gas volume in the blowhole increases to a threshold within a certain period of time, the pneumatic butterfly valve will open completely, and the extraction pipe will continuously extract the gas flowing into the device. When the gas pressure or concentration returns to normal, the compressed air is controlled to close the pneumatic butterfly valve, and then the drilling of the next meter can be carried out. An air inlet is provided on the top side of the dust removal box and not on the same side as the two air outlets; during drilling construction, the hole-mouth gas-slag separator is connected to the air inlet through an air guide pipe, and the gas mixed with coal powder during the drilling process is introduced into the dust removal box below the liquid level; A liquid level observation window is provided on the side of the dust removal box to determine the liquid level in the barrel; A transparent cover is provided on the top of the dust removal box for observing the gas outflow state in the barrel and judging the gas inflow and outflow situation; the transparent cover is connected to the dust removal box through a clamp, and a handle is fixedly connected to the dust removal box and locked with the clamp for disassembly; The manual butterfly valve at the sewage outlet and the manual butterfly valve at the air outlet are opened and closed mechanically; the pneumatic butterfly valve is connected via an air guide pipe and is opened and closed manually by controlling compressed air; The dust removal box removes coal dust from the mixed gas through the water inside the box; The device can separate the gas and cuttings discharged from the drilling in real time, and quickly control the pneumatic butterfly valve in combination with instructions to achieve closed-circuit separation of drilling gas. The pneumatic butterfly valve opens according to the command, allowing the gas in the box to enter the extraction pipe; The depth of the gas guide pipe inserted into the liquid surface inside the gas inlet is flexibly adjusted according to the gas outflow volume and the negative pressure of the extraction pipe; The sewage outlet is concave.

2. The drilling gas secondary separation device according to claim 1, characterized in that: The three-dimensional structure is a cylinder, a cone, a cube or a cuboid.

3. The drilling gas secondary separation device according to claim 1, characterized in that: The pneumatic butterfly valve, the manual butterfly valve for the sewage outlet and the manual butterfly valve for the air outlet can be replaced with electric valves.

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