CN111852539A - A system and method for low temperature dust reduction by negative pressure drainage in fully mechanized mining face - Google Patents

Abstract

The invention discloses a low temperature dust reduction system with negative pressure drainage of fully mechanized mining face. The low temperature dust reduction system includes an air inlet cover, an outer casing is detachably provided on the air inlet cover, and a bottom bracket is detachably arranged on the outer casing. There is a dust filter bracket with interference fit, a detachable negative pressure spray device is installed horizontally on the outer casing, the air inlet hood is located above the negative pressure spray device, and the dust filter bracket is provided with a cooling air nozzle. The wind surface and the air inlet surface are provided with air inlets distributed in an array. The outer casing includes a square frame body. The square frame body is provided with a sewage discharge surface, and the sewage discharge surface is provided with an array of sewage discharge outlets. The movement direction of the flow field perpendicular to the horizontal plane formed by the negative pressure drainage low temperature dust reduction system of the present invention is the same as the direction of gravity, and the cooling and humidification technology in the closed space is used to significantly improve the effect of spray dust reduction; avoid spraying in the open space. The problem of dust escape and poor dust capture effect in dust suppression.

Description

A system and method for low temperature dust reduction by negative pressure drainage in fully mechanized mining face

technical field

The invention relates to the technical field of coal mine dust control, in particular to a low temperature dust reduction system and method for negative pressure drainage of fully mechanized mining face.

Background technique

In the process of coal mine production, the fully mechanized mining face is the main source of production and personnel work area. With the increasing degree of mechanization of coal mining, the problem of dust control in the fully mechanized mining face has become more and more serious. The current dust control technology and equipment are difficult to meet the national requirements for safe production, and high concentrations of dust will also endanger the health of construction workers, so the design of an efficient dust suppression system has become something that has to be considered.

The existing dust suppression technologies in fully mechanized mining face mainly include: shearer spray, hydraulic support spray, coal seam water injection, air curtain dust isolation and other measures. However, the above measures have the following problems: these measures are all carried out in the open space where the fully mechanized mining face is located, and most of the measures use sprays to capture and settle dust in the open space, which has entered a bottleneck period at present. , the reasons are as follows: if the particle size of the spray droplet is too small, it will evaporate before it can effectively capture the dust, which will not effectively reduce dust, but will also generate evaporative air flow, which will affect the sedimentation of dust particles; if the particle size of the spray droplet is If it is too large, the dust will be affected by the airflow to bypass the droplet movement, making it more difficult to capture.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a negative pressure drainage and low temperature dust reduction system and method for fully mechanized mining face. Significantly improves the effect of spray dust reduction; avoids the problems of dust escape and poor dust capture effect in open space spray dust reduction.

The object of the present invention can be realized through the following technical solutions:

A low-temperature dust-reducing system with negative pressure drainage for fully mechanized mining face, the low-temperature dust-reducing system includes an air inlet cover, an outer casing is detachably provided on the air inlet hood, a bottom bracket is detachably arranged on the outer casing, and the outer casing is fitted with interference There is a dust filter bracket, a detachable negative pressure spray device is horizontally installed on the outer casing, the air inlet hood is located above the negative pressure spray device, and a cold air nozzle is arranged on the dust filter bracket.

The air inlet hood includes two mutually perpendicular air inlet surfaces, and the air inlet surfaces are provided with air inlets distributed in an array.

The outer casing includes a square frame body, and the square frame body is provided with a sewage discharge surface, and the sewage discharge surface is provided with sewage discharge ports distributed in an array.

The dust filter bracket includes a horizontal dust filter surface, and the dust filter surface is provided with an array of dust filter ports.

The negative pressure spray device includes an outer support frame, the outer support frame includes a top mounting plate, the outer support frame is provided with ventilation holes, the lower part of the outer support frame is provided with an array of high-pressure spray heads, and the outer support frame is provided with negative pressure fan.

Further, both ends of the air inlet surface are provided with sealing plates, the air inlet surface and the sealing plate form a pentahedral structure, and the included angle between the air inlet surface and the ground is 45 degrees.

Further, one end port of the square frame body is provided with a matching groove, the sewage discharge surface and the matching groove are respectively located at two ends of the square frame body, the outer casing is fixed on the bottom bracket through the square frame body, and the sewage discharge surface is in contact with the bottom bracket.

Further, symmetrically distributed support and fixing plates are arranged below the dust filter surface, the dust filter bracket is clamped in the square frame through the support and fixing plate, the dust filter port and the sewage outlet are perpendicular to each other in the horizontal direction, and the cold air nozzle is fixed on the dust filter surface. .

Further, the negative pressure fan is composed of a rotating shaft motor and a fan blade, and the rotating shaft motor is a mining explosion-proof motor.

Further, the negative pressure spray device is clamped in the matching groove through the top mounting plate.

Further, a closed cavity is formed between the negative pressure spray device, the dust filter support and the outer casing.

A method for low temperature dust reduction by negative pressure drainage of fully mechanized mining face, the dust reduction method comprises the following steps:

Step 1: Open the cold air nozzle, inject low-temperature air below 10°C into the closed cavity, and keep the cold air nozzle always open when it is working;

Step 2: Start the high-pressure nozzle in the negative pressure spray device, adjust it to the appropriate water pressure, and keep the high-pressure nozzle always on when it is working;

Step 3: Start the negative pressure fan in the negative pressure spray device, and inhale the dust airflow through the air inlet hood, so that the dust enters the closed cavity. Finally, it is left to the ground through the sewage outlet.

Beneficial effects of the present invention:

The movement direction of the flow field perpendicular to the horizontal plane formed by the negative pressure drainage low temperature dust reduction system of the invention is the same as the direction of gravity, and the cooling and humidification technology in the closed space is used to significantly improve the effect of spray dust reduction; avoid spraying in the open space. The problems of dust escape and poor dust capture effect in dust suppression.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is the structure schematic diagram of the negative pressure drainage low temperature dust suppression system of the present invention;

Fig. 2 is the structure schematic diagram of the air inlet hood of the present invention;

3 is a schematic diagram of the structure of the outer casing of the present invention;

4 is a schematic structural diagram of the dust filter support of the present invention;

5 is a schematic structural diagram of the negative pressure spray device of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A low temperature dust suppression system with negative pressure drainage of fully mechanized mining face, the low temperature dust suppression system includes an air inlet hood 1, as shown in Figure 1, the air inlet hood 1 is detachably provided with an outer casing 2, Bottom bracket 3, a dust filter bracket 4 is interferingly fitted on the outer shell 2, a detachable negative pressure spray device 6 is horizontally installed on the outer shell 2, the air inlet hood 1 is located above the negative pressure spray device 6, and the dust filter bracket 4 is provided. There are air-conditioning nozzles 5.

The air inlet hood 1 includes two air inlet surfaces 101 that are perpendicular to each other. As shown in FIG. 2 , the air inlet surface 101 is provided with an array of air inlets 102, and both ends of the air inlet surface 101 are provided with sealing plates 103. The wind surface 101 and the sealing plate 103 form a pentahedral structure, and the included angle between the air inlet surface 101 and the ground is 45 degrees.

The outer casing 2 includes a square frame body 203. As shown in FIG. 3, the square frame body 203 is provided with a sewage discharge surface 202, the sewage discharge surface 202 is provided with an array of sewage discharge ports 201, and one end port of the square frame body 203 is provided with a matching The groove 204 , the sewage discharge surface 202 and the matching groove 204 are located at the two ends of the square frame body 203 respectively.

The dust filter bracket 4 includes a horizontal dust filter surface 402. As shown in FIG. 4, the dust filter surface 402 is provided with an array of dust filter ports 401, and below the dust filter surface 402 is provided with a symmetrically distributed support fixing plate 403, and the dust filter bracket 4 is fixed by supporting The plate 403 is engaged in the square frame body 203 , the dust filter port 401 and the sewage discharge port 201 are perpendicular to each other in the horizontal direction, and cooperate with each other to collect dust.

The negative pressure spray device 6 includes an outer support frame 601. As shown in FIG. 5, the outer support frame 601 includes a top mounting plate 605. The outer support frame 601 is provided with ventilation holes 606, and the outer support frame 601 is provided with an array of distributed The high-pressure nozzle 602 and the outer support frame 601 are provided with a negative pressure fan. The negative pressure fan is composed of a rotating shaft motor 603 and a fan blade 604. The horizontal installation method ensures that the fan forms a flow from top to bottom and perpendicular to the horizontal plane during operation. Field, the shaft motor 603 is a mine explosion-proof motor.

The negative pressure spray device 6 is engaged in the matching groove 204 through the top mounting plate 605 .

A closed cavity is formed between the negative pressure spray device 6 , the dust filter bracket 4 and the outer casing 2 .

A method for low temperature dust reduction by negative pressure drainage of fully mechanized mining face, the dust reduction method comprises the following steps:

Step 1: Open the cold air nozzle 5, inject low-temperature air with a temperature below 10°C into the closed cavity, and keep the cold air nozzle 5 in an open state when it is working;

Step 2: start the high-pressure spray head 602 in the negative pressure spray device 6, adjust to a suitable water pressure, and keep the high-pressure spray head 602 in an open state during operation;

Step 3: Start the negative pressure fan in the negative pressure spray device 6, and inhale the dust airflow through the air inlet hood, so that the dust enters the closed cavity. The sewage surface 202 is finally left to the ground through the sewage outlet 201 .

In the description of this specification, description with reference to the terms "one embodiment," "example," "specific example," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one aspect of the present invention. in one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention.

Claims (8)

1. A low-temperature dust-reducing system with negative pressure drainage for fully mechanized mining face, the low-temperature dust-reducing system comprises an air inlet hood (1), characterized in that, an outer casing (2) is detachably provided on the described air inlet hood (1), and the outer casing A bottom bracket (3) is detachably provided on the body (2), a dust filter bracket (4) is interference fit on the outer body (2), and a detachable negative pressure spray device (6) is horizontally installed on the outer body (2). , the air inlet hood (1) is located above the negative pressure spray device (6), and the dust filter bracket (4) is provided with a cold air nozzle (5); The air inlet hood (1) includes two air inlet surfaces (101) that are perpendicular to each other, and the air inlet surfaces (101) are provided with air inlets (102) distributed in an array; The outer casing (2) includes a square frame body (203), a sewage discharge surface (202) is arranged in the square frame body (203), and the sewage discharge surface (202) is provided with an array of sewage discharge outlets (201); The dust filter bracket (4) includes a horizontal dust filter surface (402), and the dust filter surface (402) is provided with an array of dust filter ports (401); The negative pressure spray device (6) includes an outer support frame (601), the outer support frame (601) includes a top mounting plate (605), and the outer support frame (601) is provided with a ventilation hole (606) therethrough. The lower part of the (601) is provided with high-pressure spray heads (602) distributed in an array, and the outer support frame (601) is provided with a negative pressure fan. 2. The negative pressure drainage and low temperature dust reduction system for fully mechanized mining face according to claim 1, characterized in that, both ends of the air inlet surface (101) are provided with sealing plates (103), and the air inlet surface (101) is provided with sealing plates (103). 101) and the sealing plate (103) form a pentahedral structure, and the included angle between the air inlet surface (101) and the ground is 45 degrees. 3. The negative pressure drainage low temperature dust reduction system for fully mechanized mining face according to claim 1, characterized in that, a matching groove (204) is provided on one end port of the square frame body (203), and the sewage surface (202) ) and the matching grooves (204) are located at the two ends of the square frame body (203) respectively, the outer body (2) is fixed on the bottom bracket (3) through the square frame body (203), and the sewage discharge surface (202) is connected to the bottom bracket (3). )touch. 4. The negative pressure drainage low temperature dust reduction system for fully mechanized mining face according to claim 1, characterized in that, below the dust filter surface (402), symmetrically distributed support and fixing plates (403) are arranged, and a dust filter bracket ( 4) The supporting and fixing plate (403) is clamped in the square frame (203), the dust filter port (401) and the sewage outlet (201) are perpendicular to each other in the horizontal direction, and the cooling air nozzle (5) is fixed on the dust filter surface (402) superior. 5. The negative pressure drainage and low temperature dust reduction system for fully mechanized mining face according to claim 1, wherein the negative pressure fan is composed of a rotating shaft motor (603) and a fan blade (604), and the rotating shaft motor (603) For mine explosion-proof motor. 6. The negative pressure drainage and low temperature dust reduction system for fully mechanized mining face according to claim 3, wherein the negative pressure spray device (6) is engaged in the matching groove (605) through the top mounting plate (605). 204). 7 . The negative pressure drainage low temperature dust reduction system for fully mechanized mining face according to claim 1 , wherein the negative pressure spray device ( 6 ), the dust filter support ( 4 ) and the outer casing ( 2 ) are formed between the Close the cavity. 8. adopt the dust reduction method of the negative pressure drainage low temperature dust reduction system described in any one of claims 1-7, the dust reduction method comprises the following steps: Step 1: Open the cold air nozzle (5), inject low-temperature air with a temperature below 10°C into the closed cavity, and keep the cold air nozzle (5) always open during operation; Step 2: start the high-pressure spray head (602) in the negative pressure spray device (6), adjust to a suitable water pressure, and keep the high-pressure spray head (602) in an open state during operation; Step 3: Start the negative pressure fan in the negative pressure spray device (6), inhale the dust airflow through the air inlet hood, so that the dust enters the closed cavity, and the dust settles to the dust filter surface (402) after being sprayed humidified and cooled by the air conditioner The dust filter port (401) flows to the sewage discharge surface (202), and is finally left to the ground through the sewage discharge port (201).

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