A safe and environment-friendly stone coal discharging receiving device for coal mill
By employing a stone coal storage tank, a pneumatic slag discharge valve, and a sealing flange structure in the stone coal discharge device of the coal mill, the dust is drawn in by the negative pressure of the mill, which solves the problems of dust pollution and inconvenient operation, and achieves environmentally friendly and convenient stone coal discharge.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUJIAN SANGANG MINGUANG
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-07
AI Technical Summary
Existing coal mill stone and coal discharge devices have problems such as dust pollution and inconvenience in operation. In particular, the closed receiving hopper is bulky and difficult to operate, while the open receiving hopper does not meet environmental protection requirements.
Design a safe and environmentally friendly coal mill stone discharge receiving device, which adopts a stone coal storage box, pneumatic slag discharge valve, material level alarm device and sealing flange structure. It uses the negative pressure of the mill to suck up dust, and combines manual and pneumatic clamping devices to achieve sealed transportation, reducing the number of pneumatic slag discharge valves to reduce costs.
It achieves zero dust emissions, reduces the difficulty of operation for workers, reduces equipment costs, and improves environmental friendliness and ease of operation.
Smart Images
Figure CN224462878U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a stone and coal emission receiving device, specifically a safe and environmentally friendly stone and coal emission receiving device for a coal mill. Background Technology
[0002] There are various types of coal mill stone and coal discharge devices currently available. Their main function is to prevent air from being drawn in due to negative pressure inside the mill during the stone and coal discharge process, which could lead to excessive oxygen levels or even fire and explosion. Stone and coal receiving devices are mainly of two types: one is an open receiving hopper, which generates coal dust during stone and coal discharge, polluting the surrounding environment and failing to meet the ultra-low emission requirements of steel plants. The other is a closed receiving hopper, which meets ultra-low emission acceptance requirements, but is relatively bulky (e.g., receiving buckets or boxes made of thick steel plates), making it very inconvenient and difficult for workers to operate during transfer and unloading. Utility Model Content
[0003] The purpose of this invention is to address the shortcomings and defects of existing technologies by providing a safe and environmentally friendly coal and stone discharge receiving device for a coal mill. Compared to other coal and stone discharge devices, this device eliminates the need for a pneumatic slag discharge valve at the front of the coal and stone storage tank, thus saving costs. Furthermore, by connecting the inside of the mill to the trolley during slag discharge, the negative pressure generated by the mill draws the dust generated during unloading into the mill, acting as a dust collector and preventing coal dust from overflowing, resulting in a dust-free environment and hygiene. Simultaneously, the receiving trolley is easy to operate; once full, it is flexible and easy to move and unload, reducing the workload of workers.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a safe and environmentally friendly coal mill stone discharge receiving device, which includes a stone discharge pipe, a stone storage tank and a pneumatic slag discharge valve installed on the stone discharge pipe, and a material level alarm device installed at the upper end of the stone storage tank. A manual clamping device and a pneumatic clamping device are installed at the flange at the bottom of the stone discharge pipe. A flange sealing gasket is provided on the bottom side of the flange of the stone discharge pipe, and a stone trolley is provided below the end of the stone discharge pipe. A trolley sealing flange for matching the flange sealing gasket is provided on the side of the top of the stone trolley.
[0005] Furthermore, the top end of the stone and coal discharge pipe is provided with a stone and coal slag discharge port for discharging stone and coal.
[0006] Furthermore, the bottom of the stone and coal discharge pipe where the stone and coal storage box is installed is equipped with support legs.
[0007] Furthermore, the bottom of the stone and coal trolley is provided with wheel pads for reinforcing and stabilizing the trolley and reducing the stress on the flange.
[0008] Furthermore, the pneumatic slag discharge valve is installed below the discharge direction of the stone and coal discharge pipe, and the stone and coal storage box is installed above the discharge direction of the stone and coal discharge pipe.
[0009] Furthermore, four manual clamping devices are provided, and the four manual clamping devices are equidistantly distributed at the end of the stone and coal discharge pipe. Two pneumatic clamping devices are provided, and the two pneumatic clamping devices are symmetrically arranged on both sides of the end of the stone and coal discharge pipe.
[0010] Furthermore, it also includes a controller for controlling the material level alarm device and the pneumatic slag discharge valve, the controller being a SIMATIC S7-1500.
[0011] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This device has at least the following advantages:
[0012] 1. Compared to other stone and coal discharge devices, this device has one less pneumatic slag discharge valve at the front of the stone and coal storage box. When two pneumatic slag discharge valves discharge stone and coal, they are closed and opened at the front and back to prevent air from being sucked into the mill. Since the receiving trolley is a sealed device, only one pneumatic slag discharge valve device is needed, which saves costs.
[0013] 2. During slag discharge, the inside of the mill is connected to the trolley. The negative pressure generated by the mill (about -1000pa) draws the dust generated during unloading into the mill, which acts as a dust collector, preventing coal dust from overflowing and ensuring no dust in the surrounding area, thus protecting the environment and maintaining hygiene.
[0014] 3. The material receiving trolley is easy to operate. After being filled with material, it is flexible and easy to move and tilt, which can reduce the workload of workers. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model.
[0017] Figure 2 yes Figure 1 A schematic diagram of the structure of the trolley for removing stones and coal.
[0018] Figure 3 This is a schematic diagram of the structure of the stone and coal cart in this utility model.
[0019] Figure 4yes Figure 3 The corresponding top-view structural diagram.
[0020] Explanation of reference numerals in the attached drawings: 1. Stone and coal discharge pipe; 2. Material level alarm device; 3. Stone and coal storage box; 4. Support leg; 5. Pneumatic slag discharge valve; 6. Stone and coal trolley; 7. Flange gasket; 8. Manual clamping device; 9. Pneumatic clamping device; 10. Trolley wheel pad; 11. Trolley sealing flange; 101. Stone and coal slag discharge port. Detailed Implementation
[0021] See Figures 1-4 As shown, the technical solution adopted in this specific embodiment is as follows: It includes a stone and coal discharge pipe 1, a stone and coal storage box 3 and a pneumatic slag discharge valve 5 installed on the stone and coal discharge pipe 1, and a material level alarm device 2 installed at the upper end of the stone and coal storage box 3. A manual clamping device 8 and a pneumatic clamping device 9 are installed at the flange at the bottom of the stone and coal discharge pipe 1. A flange sealing gasket 7 is provided on the bottom side of the flange of the stone and coal discharge pipe 1, and a stone and coal trolley 6 is provided below the end of the stone and coal discharge pipe 1. A trolley sealing flange 11 for matching the flange sealing gasket 7 is provided on the side of the top of the stone and coal trolley 6.
[0022] More specifically, the top end of the stone and coal discharge pipe 1 is provided with a stone and coal slag discharge port 101 for discharging stone and coal.
[0023] More specifically, a support leg 4 is installed at the bottom of the stone and coal discharge pipe 1 where the stone and coal storage box 3 is installed. The support leg 4 can support and fix the stone and coal discharge pipe 1 and the stone and coal storage box 3, ensuring the stability of the support of the stone and coal discharge pipe 1 and the stone and coal storage box 3.
[0024] More specifically, the bottom of the stone and coal trolley 6 is provided with wheel pads 10 for reinforcing and stabilizing the stone and coal trolley 6 and reducing the stress on the flange.
[0025] More specifically, the pneumatic slag discharge valve 5 is installed below the stone and coal discharge pipe 1 in the discharge direction, and the stone and coal storage tank 3 is installed above the stone and coal discharge pipe 1 in the discharge direction. By installing the pneumatic slag discharge valve 5 below the stone and coal storage tank 3, the pneumatic slag discharge valve 5 can control the discharge of stone and coal from the stone and coal storage tank 3.
[0026] More specifically, four manual clamping devices 8 are provided, and the four manual clamping devices 8 are equally distributed at the end of the stone and coal discharge pipe 1. Two pneumatic clamping devices 9 are provided, and the two pneumatic clamping devices 9 are symmetrically arranged on both sides of the end of the stone and coal discharge pipe 1. Through the four manual clamping devices 8 and the two pneumatic clamping devices 9, the stone and coal trolley 6 can be tightly connected to the stone and coal discharge pipe 1.
[0027] More specifically, it also includes a controller for controlling the material level alarm device 2 and the pneumatic slag discharge valve 5, the controller model being SIMATIC S7-1500.
[0028] The working principle of this utility model is as follows: The stone and coal from the mill are discharged to the stone and coal storage tank 3 through the stone and coal discharge pipe 1. After the material level alarm device 2 on the stone and coal storage tank 3 detects the set material level, the pneumatic slag discharge valve 5 at the bottom of the stone and coal storage tank 3 will automatically open. The stone and coal are discharged to the receiving stone and coal trolley 6 through the stone and coal discharge pipe 1. At this time, since the mill system is connected to the stone and coal trolley 6, the dust generated during the discharge process is carried into the mill by negative pressure to avoid polluting the environment. At the same time, the stone and coal trolley 6 and the mill are connected and sealed by the flange sealing gasket 7 and the trolley sealing flange 11, which can also prevent air from being sucked into the mill due to negative pressure, resulting in excessive oxygen content, thus ensuring safe discharge. After the stone and coal storage tank 3 is emptied, its material level alarm device 2 detects that the material level is empty, and the pneumatic slag discharge valve 5 will automatically close. After one or several slag discharges, the material level of the stone and coal trolley 6 is calculated based on the volume ratio between the stone and coal trolley 6 and the stone and coal storage tank 3. Once the stone and coal trolley 6 is full, it is pulled out to empty. Specifically, the trolley operation is as follows: the empty stone and coal trolley 6 is manually pushed to the bottom of the flange of the stone and coal discharge pipe 1. After the flange of the stone and coal discharge pipe 1 is aligned with the sealing flange 11 of the trolley, the trolley is lifted and clamped by the two pneumatic clamping devices 9 on the left and right. Then, it is clamped and reinforced by the four manual clamping devices 8 on the left and right. At this time, the trolley is suspended to receive material. In order to reduce the stress on the flange clamping device, the trolley wheel pads 10 are inserted under the wheels of the trolley to fix the trolley. The trolley wheel pads 10 can play a role in reinforcing and stabilizing the stone and coal trolley 6 and reducing the stress on the flange. After the trolley is filled with material, remove the wheel pads 10, loosen the four manual clamping devices 8, and then loosen the two pneumatic clamping devices 9. At this point, the trolley is placed on the ground. Pull out the trolley and move the stones and coal in the trolley to the unloading site to empty it.
[0029] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A safe and environmentally friendly coal mill stone and coal discharge receiving device, characterized in that: It includes a stone and coal discharge pipe (1), on which a stone and coal storage box (3) and a pneumatic slag discharge valve (5) are installed. A material level alarm device (2) is installed at the upper end of the stone and coal storage box (3). A manual clamping device (8) and a pneumatic clamping device (9) are installed at the flange at the bottom of the stone and coal discharge pipe (1). A flange sealing gasket (7) is provided on the bottom side of the flange of the stone and coal discharge pipe (1). A stone and coal trolley (6) is provided below the end of the stone and coal discharge pipe (1). A trolley sealing flange (11) for matching the flange sealing gasket (7) is provided on the side of the top of the stone and coal trolley (6).
2. The safe and environmentally friendly coal mill stone and coal discharge receiving device according to claim 1, characterized in that: The top end of the stone and coal discharge pipe (1) is provided with a stone and coal slag discharge port (101) for discharging stone and coal.
3. The safe and environmentally friendly coal mill stone and coal discharge receiving device according to claim 1, characterized in that: The bottom of the stone and coal discharge pipe (1) where the stone and coal storage box (3) is installed is supported by a support leg (4).
4. The safe and environmentally friendly coal mill stone and coal discharge receiving device according to claim 1, characterized in that: The bottom of the stone and coal trolley (6) is provided with wheel pads (10) for reinforcing and stabilizing the stone and coal trolley (6) and reducing the stress on the flange.
5. The safe and environmentally friendly coal mill stone and coal discharge receiving device according to claim 1, characterized in that: The pneumatic slag discharge valve (5) is installed below the discharge direction of the stone and coal discharge pipe (1), and the stone and coal storage box (3) is installed above the discharge direction of the stone and coal discharge pipe (1).
6. The safe and environmentally friendly coal mill stone and coal discharge receiving device according to claim 1, characterized in that: There are four manual clamping devices (8), and the four manual clamping devices (8) are equidistantly distributed at the end of the stone and coal discharge pipe (1). There are two pneumatic clamping devices (9), and the two pneumatic clamping devices (9) are symmetrically arranged on both sides of the end of the stone and coal discharge pipe (1).
7. The safe and environmentally friendly coal mill stone and coal discharge receiving device according to claim 1, characterized in that: It also includes a controller for controlling the material level alarm device (2) and the pneumatic slag discharge valve (5), the controller being model SIMATICS7-1500.