Dust suppression device for coal conveying system of thermal power plant

Abstract

The utility model discloses a thermal power plant coal conveying system dust suppression device which comprises a first suppression frame, a second suppression frame is installed on one side of the first suppression frame, a third suppression frame is installed on one side of the second suppression frame, and meanwhile a third negative pressure pipe is fixedly installed on the surface of the third suppression frame. And a second negative pressure pipe is fixedly mounted on the surface of the second suppression frame. According to the dust suppression device for the coal conveying system of the thermal power plant, negative pressure is formed in the first suppression frame, the second suppression frame and the third suppression frame, so that when pulverized coal is collected on the surface of the conveying belt, generated pulverized coal dust can be adsorbed through the first suppression frame, the second suppression frame and the third suppression frame; the content of pulverized coal floating in a workshop is reduced, diffusion of dust generated in the coal conveying process is remarkably reduced, the dust concentration in air is reduced, and a cleaner and healthier working environment is provided for workers.

Description

Technical Field

[0001] The utility model relates to the field of dust suppression equipment, in particular to a dust suppression device for a coal conveying system in a thermal power plant. Background Technique

[0002] During the conveying process of the coal conveying belt in a thermal power plant, a large amount of pulverized coal generated on the surface of the conveying belt will bring the following defects: Environmental pollution: A large amount of pulverized coal diffuses into the air, causing serious air pollution and having an adverse impact on the surrounding ecological environment; for example, nearby plants may be covered by pulverized coal, affecting photosynthesis and normal growth; increasing the content of particulate matter in the air may lead to the aggravation of haze weather; Resource waste: The large amount of scattered pulverized coal means the loss of coal resources, reducing the utilization rate of coal and increasing the power generation cost; the coal cannot be fully utilized, affecting the economic benefits of the thermal power plant; Safety hazards: The accumulated pulverized coal is prone to cause fire or even explosion accidents, posing a serious threat to personnel and equipment; for example, a tiny fire source may trigger a large-scale fire; increasing the risk of equipment failure and affecting the stable operation of the entire coal conveying system;

[0003] Equipment damage: Pulverized coal will enter the mechanical components of the conveying belt, such as rollers, bearings, etc., accelerating the wear and corrosion of parts; it may cause faults such as the deviation and slipping of the conveying belt, shortening the service life of the equipment; Affecting workers' health: Workers exposed to the pulverized coal environment for a long time are prone to suffer from occupational diseases such as respiratory diseases and lung diseases; it may also have an adverse impact on the vision of workers, such as causing dry eyes and decreased vision; Therefore, when the pulverized coal is conveyed through the conveying belt, how to reduce the content of pulverized coal floating in the air is an urgent problem to be solved, which has important practical significance, and this case is generated based on this. Content of the Utility Model

[0004] The purpose of the utility model is to provide a dust suppression device for a coal conveying system in a thermal power plant to solve the defects mentioned in the above background technique.

[0005] To achieve the above purpose, a dust suppression device for a coal conveying system in a thermal power plant is provided, including a first suppression frame, a second suppression frame is installed on one side of the first suppression frame, and a third suppression frame is installed on one side of the second suppression frame. At the same time, a third negative pressure pipe is fixedly installed on the surface of the third suppression frame, and a second negative pressure pipe is fixedly installed on the surface of the second suppression frame. A first negative pressure pipe is fixedly installed on the surface of the first suppression frame; a first air extraction pipe is fixedly arranged at the bottom of the first negative pressure pipe, and a second air extraction pipe is fixedly arranged at the bottom of the second negative pressure pipe. At the same time, a third air extraction pipe is fixedly arranged at the bottom of the third negative pressure pipe, and the end of the third air extraction pipe is communicated with a negative pressure pump. The first suppression frame, the second suppression frame and the third suppression frame are butted together and fixed on the outer frame of the coal conveying belt in the thermal power plant through brackets.

[0006] Preferably, extension wing plates are fixedly installed on both sides of the bottom of the first suppression frame, the second suppression frame, and the third suppression frame, and the two groups of extension wing plates are arranged in an isosceles trapezoid shape.

[0007] Preferably, positioning seats are opened at the bottoms of the two groups of extension wing plates, positioning grooves are opened inside the positioning seats, the sizes of the positioning grooves are adapted to those of the isolation net plates, and the isolation net plates are clamped inside the positioning grooves and fixed by bolts.

[0008] Preferably, a second splicing seat is fixedly welded to the end of the third suppression frame, a first splicing seat is fixedly welded to the end of the second suppression frame, and the second suppression frame is inserted into the inner side of the end of the first suppression frame through the first splicing seat at the end.

[0009] Preferably, the third suppression frame is inserted into the inner side of the end of the second suppression frame through the second splicing seat at the end, and adjacent two groups of suppression frames are positioned and assembled through the splicing seats.

[0010] Preferably, isolation net plates are installed on the bottoms of the first suppression frame, the second suppression frame, and the third suppression frame by screwing, connection flanges are fixedly welded to both ends of the air extraction pipes at the tops of the first suppression frame, the second suppression frame, and the third suppression frame, and adjacent two groups of air extraction pipes are hermetically connected through the connection flanges.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. By forming a negative pressure inside the first suppression frame, the second suppression frame, and the third suppression frame, the present utility model can adsorb the pulverized coal dust generated when collecting pulverized coal on the surface of the conveyor belt through the first suppression frame, the second suppression frame, and the third suppression frame, reduce the content of pulverized coal floating in the workshop, significantly reduce the dust diffusion generated during the coal conveying process, reduce the dust concentration in the air, and provide a cleaner and healthier working environment for the staff;

[0013] 2. In the present utility model, the selected number of suppression frames includes but is not limited to three groups, and the number of suppression frames used can be selected according to the length of the pulverized coal conveyor belt. When the suppression frames are docked, they are quickly assembled through the splicing seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0015] Figure 2 is Figure 1 the top view of

[0016] Figure 3 is Figure 1 the bottom view of

[0017] Figure 4 Is the bottom view of the second suppression frame;

[0018] Figure 5 Is the schematic cross-sectional structure diagram of the second suppression frame.

[0019] Reference numerals in the figure: 1, the first suppression frame; 2, the second suppression frame; 3, the third suppression frame; 4, the extended wing plate; 5, the first negative pressure pipe; 6, the first air extraction pipe; 7, the first splicing seat; 8, the second splicing seat; 9, the connecting flange; 10, the second air extraction pipe; 11, the second negative pressure pipe; 12, the third negative pressure pipe; 13, the third air extraction pipe; 14, the positioning seat; 15, the isolation net plate. Specific embodiments

[0020] Please refer to Figures 1-5 , the present utility model provides a dust suppression device for a coal conveying system in a thermal power plant, including a first suppression frame 1, a second suppression frame 2 is installed on one side of the first suppression frame 1, and a third suppression frame 3 is installed on one side of the second suppression frame 2. At the same time, a third negative pressure pipe 12 is fixedly installed on the surface of the third suppression frame 3, and a second negative pressure pipe 11 is fixedly installed on the surface of the second suppression frame 2, and a first negative pressure pipe 5 is fixedly installed on the surface of the first suppression frame 1; a first air extraction pipe 6 is fixedly arranged at the bottom of the first negative pressure pipe 5, and a second air extraction pipe 10 is fixedly arranged at the bottom of the second negative pressure pipe 11. At the same time, a third air extraction pipe 13 is fixedly arranged at the bottom of the third negative pressure pipe 12, and the end of the third air extraction pipe 13 is communicated with a negative pressure pump. The first suppression frame 1, the second suppression frame 2 and the third suppression frame 3 are butted together and fixed on the outer frame of the coal conveying belt in the thermal power plant through brackets.

[0021] Working principle: When in use, first, the first suppression frame 1, the second suppression frame 2, and the third suppression frame 3 are butted and installed together through the first splicing seat 7 and the second splicing seat 8. At the same time, the adjacent two groups of air extraction pipes are hermetically connected through the connecting flange 9. The external switch of the external negative pressure pump is started, and a negative pressure is formed inside the first suppression frame 1, the second suppression frame 2, and the third suppression frame 3. When collecting pulverized coal on the surface of the conveyor belt, the pulverized coal dust generated can be adsorbed by the first suppression frame 1, the second suppression frame 2, and the third suppression frame 3, reducing the content of pulverized coal floating in the workshop, significantly reducing the dust diffusion generated during coal conveying, reducing the dust concentration in the air, and providing a cleaner and healthier working environment for the staff; reducing the wear and erosion of the conveyor belt and related equipment by dust, and extending the service life of the equipment; for some precision transmission components, it is not easy to be damaged due to dust intrusion; helping the thermal power plant to meet the increasingly strict environmental protection regulations and emission standards, and avoiding fines and rectifications due to excessive dust emissions.

[0022] As a preferred embodiment, extension wing plates 4 are fixedly installed on both sides of the bottom of the first suppression frame 1, the second suppression frame 2 and the third suppression frame 3, and the two groups of extension wing plates 4 are arranged in an isosceles trapezoid shape.

[0023] Positioning seats 14 are opened at the bottoms of the two groups of extension wing plates 4, positioning grooves are opened inside the positioning seats 14, the sizes of the positioning grooves are adapted to those of the isolation net plates 15, and the isolation net plates 15 are clamped inside the positioning grooves and fixed by bolts.

[0024] A second splicing seat 8 is fixedly welded to the end of the third suppression frame 3, a first splicing seat 7 is fixedly welded to the end of the second suppression frame 2, and the second suppression frame 2 is inserted into the inner side of the end of the first suppression frame 1 through the first splicing seat 7 at the end.

[0025] As Figures 1-5 shown: Isolation net plates 15 are installed at the bottoms of the first suppression frame 1, the second suppression frame 2 and the third suppression frame 3. With the setting of the isolation net plates 15, when the three groups of suppression frames adsorb pulverized coal, larger coal blocks, stones or other foreign objects are effectively blocked from entering the negative pressure absorption pipe, preventing these objects from blocking the pipeline or damaging subsequent dust collection equipment; the large particle impurities and part of the pulverized coal intercepted on the filter net plate are easy to clean and collect, reducing the dust accumulation in the subsequent pipelines and equipment, and reducing the difficulty and cost of maintenance.

[0026] As a preferred embodiment, the third suppression frame 3 is inserted into the inner side of the end of the second suppression frame 2 through the second splicing seat 8 at the end, and adjacent two groups of suppression frames are positioned and assembled through the splicing seats.

[0027] As a preferred embodiment, isolation net plates 15 are screwed and installed at the bottoms of the first suppression frame 1, the second suppression frame 2 and the third suppression frame 3, connection flanges 9 are fixedly welded to both ends of the air extraction pipes at the tops of the first suppression frame 1, the second suppression frame 2 and the third suppression frame 3, and adjacent two groups of air extraction pipes are hermetically connected through the connection flanges 9.

[0028] The selected number of suppression frames includes but is not limited to three groups. The number of suppression frames used can be selected according to the length of the pulverized coal conveyor belt. When the suppression frames are docked, they are assembled through the splicing seats; the air extraction pipes at the tops of the suppression frames are docked through the connection flanges 9.

Claims

1. A dust suppression device for a coal conveying system in a thermal power plant, comprising a first suppression frame (1), characterized in that: One side of the first suppression frame (1) is installed with a second suppression frame (2), one side of the second suppression frame (2) is installed with a third suppression frame (3), a third negative pressure pipe (12) is fixedly installed on the surface of the third suppression frame (3), a second negative pressure pipe (11) is fixedly installed on the surface of the second suppression frame (2), and a first negative pressure pipe (5) is fixedly installed on the surface of the first suppression frame (1); a first air extraction pipe (6) is fixedly arranged at the bottom of the first negative pressure pipe (5), a second air extraction pipe (10) is fixedly arranged at the bottom of the second negative pressure pipe (11), a third air extraction pipe (13) is fixedly arranged at the bottom of the third negative pressure pipe (12), and the end of the third air extraction pipe (13) is communicated with a negative pressure pump. The first suppression frame (1), the second suppression frame (2) and the third suppression frame (3) are butted together and fixed on the outer frame of the coal conveying belt of the thermal power plant through brackets.

2. The dust suppression device for the coal conveying system of a thermal power plant according to claim 1, characterized in that: Extended wing plates (4) are fixedly installed on both sides of the bottom of the first suppression frame (1), the second suppression frame (2) and the third suppression frame (3), and the two groups of extended wing plates (4) are arranged in an isosceles trapezoid shape.

3. The dust suppression device for the coal conveying system of a thermal power plant according to claim 2, characterized in that: Positioning seats (14) are opened at the bottoms of the two groups of extended wing plates (4), positioning grooves are opened inside the positioning seats (14), the sizes of the positioning grooves are adapted to those of the isolation net plates (15), and the isolation net plates (15) are clamped inside the positioning grooves and fixed by bolts.

4. A dust suppression device for a coal conveying system in a thermal power plant according to claim 1, characterized in that: A second splicing seat (8) is welded and fixed at the end of the third suppression frame (3), a first splicing seat (7) is welded and fixed at the end of the second suppression frame (2), and the second suppression frame (2) is inserted inside the inner side of the end of the first suppression frame (1) through the first splicing seat (7) at the end.

5. The dust suppression device for the coal conveying system of a thermal power plant according to claim 4, wherein: The third suppression frame (3) is inserted inside the inner side of the end of the second suppression frame (2) through the second splicing seat (8) at the end, and adjacent two groups of suppression frames are positioned and assembled through the splicing seats.

6. The dust suppression device for the coal conveying system of a thermal power plant according to claim 1, characterized in that: Isolation net plates (15) are installed on the bottoms of the first suppression frame (1), the second suppression frame (2) and the third suppression frame (3) by screwing, connecting flanges (9) are welded and fixed at both ends of the air extraction pipes at the tops of the first suppression frame (1), the second suppression frame (2) and the third suppression frame (3), and adjacent two groups of air extraction pipes are hermetically connected through the connecting flanges (9).

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