Pebble coal dust-free discharging device

Abstract

The utility model discloses a pebble coal dust-free discharging device which comprises a pebble coal collecting box, a pebble coal discharging pipeline and a pebble coal pneumatic discharging valve. The pressure relief pipeline is mounted on the top surface of the pebble coal collecting box and communicated with the interior of the pebble coal collecting box; the pneumatic valve is mounted at the top end of the pressure relief pipeline; the dust filter is mounted at the top of the pneumatic valve; the pressure relief pipeline is mounted behind the pebble coal discharge valve, the dust filter is mounted at the tail end of the pipeline, active pressure relief is realized through linkage control of the pneumatic valve, and when the pebble coal collecting box is replaced subsequently, the pressure relief pneumatic valve is opened in an interlocking manner after the discharge valve is closed, so that the pebble coal collecting box is replaced. Positive-pressure gas in the pebble coal discharging device is discharged instantly from the pressure relief pipeline through the dust filter, it is guaranteed that the internal pressure and the external pressure of the pebble coal discharging device are consistent, then no dust or smoke is sprayed out after the locking sealing device is loosened, leakage of high-temperature smoke and dust is effectively avoided, and operators do not need to make direct contact with a pollution source.

Description

Technical Field

[0001] This utility model belongs to the technical field of auxiliary equipment for power plant coal mills, and specifically relates to a dust-free emission device for stone coal. Background Technology

[0002] In thermal power plants, the medium-speed coal mill is the core equipment of the pulverizing system. The coking stones (containing coal powder, impurities, and abrasive metal particles) generated during its operation need to be cleaned regularly through a dedicated discharge device. The existing coking stone discharge device mainly consists of coking stone discharge pipes, coking stone collection boxes, locking and sealing devices, and pneumatic discharge valves. Its working principle is as follows:

[0003] During operation: The coal mill maintains a positive pressure of 7 kPa. The coal and stones are transported to the discharge pipe through the scraper and finally fall into the collection box.

[0004] Replacement phase: When the collection box is full, the pneumatic discharge valve needs to be manually closed and the locking sealing device needs to be released to replace the collection box. During this process, because the pressure inside the device is higher than the ambient pressure, a large amount of dust and high-temperature flue gas are ejected with the pressure relief operation, causing serious pollution in the coal mill area, threatening the health of operators, and may cause the risk of dust explosion.

[0005] Therefore, this utility model proposes a dust-free emission device for gravel and coal. Utility Model Content

[0006] The purpose of this invention is to provide a dust-free emission device for stone and coal to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a dust-free emission device for gravel and coal, comprising a gravel and coal collection box, a gravel and coal emission pipe, and a pneumatic emission valve for gravel and coal. The left side of the gravel and coal collection box is provided with an inlet pipe connected to the gravel and coal emission pipe, and the pneumatic emission valve for gravel and coal is located between the gravel and coal emission pipe and the inlet pipe.

[0008] A pressure relief pipe installed on the top surface of the stone and coal collection box and connected to the inside of the stone and coal collection box; a pneumatic valve installed at the top of the pressure relief pipe; and a dust filter installed at the top of the pneumatic valve.

[0009] Preferably, it also includes an adjustable air-blocking component, which is disposed on the top of the stone and coal collection box.

[0010] Preferably, the adjustable air-blocking assembly includes an arc-shaped base rail fixed to the top surface of the stone and coal collection box and an arc-shaped protective plate slidably installed on top of the arc-shaped base rail and located on one side of the dust filter.

[0011] Preferably, the top surface of the arc-shaped base rail is provided with a T-shaped groove, and the bottom surface of the arc-shaped protective plate is fixed with a T-shaped slider that matches the T-shaped groove, and the T-shaped slider slides in the T-shaped groove.

[0012] Preferably, the adjustable air baffle assembly further includes a limiting structure, which is disposed on the outside of the arc-shaped protective plate.

[0013] Preferably, the limiting structure includes a support plate fixed to the outer surface of the arc-shaped protective plate, a tightening block set on the top of the support plate, and a clamping screw fixed to the bottom surface of the tightening block. The clamping screw is threaded through the support plate, and the bottom end of the clamping screw abuts against the top surface of the stone and coal collection box.

[0014] Preferably, the surface of the support plate is provided with a threaded hole that matches the clamping screw.

[0015] Preferably, the surface of the tightening block is provided with anti-slip grooves.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model installs a pressure relief pipe after the stone and coal discharge valve, and installs a dust filter at the end of the pipe. Active pressure relief is achieved through the linkage control of a pneumatic valve. When the stone and coal collection box is replaced, the pressure relief pneumatic valve is interlocked and opened after the discharge valve is closed. The positive pressure gas in the stone and coal discharge device is instantly discharged from the pressure relief pipe through the dust filter, ensuring that the pressure inside and outside the stone and coal discharge device is consistent. After the locking and sealing device is loosened, no dust or smoke is sprayed out, effectively avoiding the leakage of high-temperature smoke and dust. Operators do not need to directly contact the pollution source, fundamentally solving the dust pollution problem in the stone and coal discharge process and reducing occupational disease hazards for stone and coal operators. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This utility model Figure 2 A magnified view of a portion of region A in the middle;

[0020] In the diagram: 1. Stone and coal collection box; 11. Feed pipe; 2. Stone and coal discharge pipe; 3. Stone and coal pneumatic discharge valve; 4. Pressure relief pipe; 5. Pneumatic valve; 6. Dust filter; 71. Arc-shaped base rail; 72. Arc-shaped protective plate; 73. T-shaped chute; 75. Limiting structure; 751. Support plate; 752. Tightening block; 753. Tightening screw. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Please see Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a technical solution: a dust-free emission device for gravel and coal, including a gravel and coal collection box 1, a gravel and coal emission pipe 2, and a pneumatic emission valve 3. The left side of the gravel and coal collection box 1 is provided with an inlet pipe 11 connected to the gravel and coal emission pipe 2, and the pneumatic emission valve 3 is located between the gravel and coal emission pipe 2 and the inlet pipe 11. The above structures are all prior art, and the specific structural details and principles will not be elaborated here. When the gravel and coal collection box 1 is full, the pneumatic emission valve 3 can be closed, and then the gravel and coal emission pipe 2 and the inlet pipe 11 can be disassembled to replace the gravel and coal collection box 1. It also includes...

[0024] A pressure relief pipe 4 is installed on the top surface of the stone and coal collection box 1 and communicates with the inside of the stone and coal collection box 1. A pneumatic valve 5 is installed at the top of the pressure relief pipe 4. A dust filter 6 is installed at the top of the pneumatic valve 5. The specification of the pressure relief pipe 4 is DN32. The air intake of the pneumatic valve 5 comes from the original control air of the stone and coal pneumatic discharge valve 3. The pneumatic valve 5 and the stone and coal pneumatic discharge valve 3 can operate simultaneously, but the opening and closing states are opposite. This ensures that when the coal mill is running, the stone and coal pneumatic discharge valve 3 opens to discharge slag, and the pneumatic valve 5 closes, so that the hot flue gas in the system does not leak out. When replacing the stone and coal collection box 1, after the stone and coal pneumatic discharge valve 3 is closed, the pneumatic valve 5 is interlocked and opened. The positive pressure gas in the stone and coal discharge device is instantly discharged from the pressure relief pipe 4 through the dust filter 6, ensuring that the pressure inside and outside the stone and coal discharge device is consistent. Finally, the stone and coal discharge pipe 2 and the feed pipe 11 are disassembled to replace the stone and coal collection box 1. This process ensures that there is no dust or flue gas ejection during the replacement process.

[0025] Example 2

[0026] Please see Figures 1 to 3 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but with the difference that it also includes an adjustable air-blocking component, which is installed on the top of the stone and coal collection box 1.

[0027] In this embodiment, preferably, the adjustable gas-blocking assembly includes an arc-shaped base rail 71 welded and fixed to the top surface of the stone and coal collection box 1, and an arc-shaped protective plate 72 slidably installed on the top of the arc-shaped base rail 71 and located on one side of the dust filter 6. Under the blocking effect of the arc-shaped protective plate 72, when the subsequent operator closes the stone and coal pneumatic discharge valve 3 and opens the pneumatic valve 5 to depressurize before changing the box, the gas sprayed from the dust filter 6 will be partially blocked by the arc-shaped protective plate 72, preventing the gas from splashing in front of the dust filter 6 during the depressurization process, further reducing the impact of the gas on the surrounding environment during depressurization. At the same time, the position of the arc-shaped protective plate 72 can also be adjusted to a certain extent according to the actual use requirements to meet different blocking requirements, and the use is highly flexible.

[0028] In this embodiment, preferably, the top surface of the arc-shaped base rail 71 is provided with a T-shaped groove 73, and the bottom surface of the arc-shaped protective plate 72 is fixed with a T-shaped slider that is adapted to the T-shaped groove 73. The T-shaped slider slides in the T-shaped groove 73, so that the arc-shaped protective plate 72 can slide on the top of the arc-shaped base rail 71 to adjust its position.

[0029] In this embodiment, preferably, the adjustable air baffle assembly further includes a limiting structure 75, which is disposed on the outside of the arc-shaped protective plate 72.

[0030] In this embodiment, preferably, the limiting structure 75 includes a support plate 751 welded and fixed to the outer surface of the arc-shaped protective plate 72, a tightening block 752 disposed on the top of the support plate 751, and a clamping screw 753 welded and fixed to the bottom surface of the tightening block 752. The clamping screw 753 is threaded through the support plate 751, and the bottom end of the clamping screw 753 abuts against the top surface of the stone and coal collection box 1, thereby achieving stable limiting of the arc-shaped protective plate 72 during daily use. When the position of the arc-shaped protective plate 72 needs to be adjusted later, it is only necessary to reverse the position of the tightening block 752. Rotating the clockwise direction causes the tightening screw 753 to move upward and no longer press against the stone and coal collection box 1, thus quickly releasing the limiting position on the arc-shaped protective plate 72. Then, the arc-shaped protective plate 72 can be slid on the top of the arc-shaped base rail 71 for position adjustment. After the arc-shaped protective plate 72 is adjusted to the appropriate position, the tightening block 752 is rotated clockwise so that the bottom end of the tightening screw 753 can press firmly against the top surface of the stone and coal collection box 1, thereby re-fixing the arc-shaped protective plate 72 and completing the stable fixation of the arc-shaped protective plate 72 after position adjustment.

[0031] In this embodiment, preferably, the surface of the support plate 751 is provided with a threaded hole that matches the clamping screw 753, so that the clamping screw 753 can be smoothly threadedly connected to the support plate 751.

[0032] In this embodiment, preferably, the surface of the tightening block 752 is provided with an anti-slip groove, which can play a certain anti-slip role when the operator tightens the tightening block 752.

[0033] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust-free emission device for gravel and coal, comprising a gravel and coal collection box (1), a gravel and coal emission pipe (2), and a pneumatic emission valve for gravel and coal (3), wherein the left side of the gravel and coal collection box (1) is provided with an inlet pipe (11) connected to the gravel and coal emission pipe (2), and the pneumatic emission valve for gravel and coal (3) is disposed between the gravel and coal emission pipe (2) and the inlet pipe (11), characterized in that: Also includes A pressure relief pipe (4) installed on the top surface of the stone and coal collection box (1) and communicating with the inside of the stone and coal collection box (1), a pneumatic valve (5) installed at the top of the pressure relief pipe (4), and a dust filter (6) installed at the top of the pneumatic valve (5).

2. The dust-free emission device for stone and coal as described in claim 1, characterized in that: It also includes an adjustable air-blocking assembly, which is disposed on top of the stone and coal collection box (1).

3. The dust-free emission device for stone and coal according to claim 2, characterized in that: The adjustable air-blocking assembly includes an arc-shaped base rail (71) fixed to the top surface of the stone and coal collection box (1) and an arc-shaped protective plate (72) slidably installed on the top of the arc-shaped base rail (71) and located on one side of the dust filter (6).

4. The dust-free emission device for stone and coal as described in claim 3, characterized in that: The top surface of the arc-shaped base rail (71) is provided with a T-shaped groove (73), and the bottom surface of the arc-shaped protective plate (72) is fixed with a T-shaped slider that is compatible with the T-shaped groove (73), and the T-shaped slider slides in the T-shaped groove (73).

5. The dust-free emission device for stone and coal according to claim 2, characterized in that: The adjustable air-blocking assembly also includes a limiting structure (75), which is disposed on the outside of the arc-shaped protective plate (72).

6. The dust-free emission device for stone and coal according to claim 5, characterized in that: The limiting structure (75) includes a support plate (751) fixed to the outer surface of the arc-shaped protective plate (72), a tightening block (752) set on the top of the support plate (751), and a tightening screw (753) fixed to the bottom surface of the tightening block (752). The tightening screw (753) is threaded through the support plate (751), and the bottom end of the tightening screw (753) abuts against the top surface of the stone and coal collection box (1).

7. The dust-free emission device for stone and coal according to claim 6, characterized in that: The surface of the support plate (751) is provided with a threaded hole that matches the clamping screw (753).

8. The dust-free emission device for stone and coal according to claim 6, characterized in that: The surface of the tightening block (752) is provided with anti-slip grooves.

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