A device for processing stone coal
By installing double-layer gate plates and dust removal units on the stone and coal hopper, the problem of dust overflow was solved, and the effective collection and reuse of dust was achieved, improving environmental cleanliness and economic benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU ORIENTAL POWER CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-10
AI Technical Summary
After the existing stone and coal discharge device has been running for a period of time, dust can easily overflow from the lower opening of the stone and coal hopper, causing environmental pollution in the plant.
A stone and coal processing device is designed, which adopts a double-gate plate structure. The first gate plate blocks the stone and coal, while the second gate plate does not come into contact with the stone and coal. Combined with a dust removal unit and a control unit, the leaked dust is introduced into the boiler for re-combustion using the negative pressure of the boiler, thus preventing dust from overflowing.
It effectively prevents dust from spilling out, improves environmental cleanliness, and enhances economic efficiency through dust re-combustion, while ensuring boiler combustion stability.
Smart Images
Figure CN224475100U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stone and coal processing equipment, and in particular to a stone and coal processing device. Background Technology
[0002] In thermal power plants, medium-speed roller mills (such as HP and MPS types) are widely used in pulverized coal preparation. During operation, ingrids such as gangue and iron lumps in the raw coal, known as coke, accumulate at the bottom of the mill and need to be periodically discharged. Existing coke discharge devices typically consist of a coke hopper and a dust removal mechanism. The coke hopper has openings at both ends, with the dust removal mechanism covering the upper opening and a gate at the lower opening. During discharge, coke first enters the coke hopper through the upper opening, is blocked by the gate, and is stored inside the hopper for dust removal. Then, the gate is opened, allowing the coke to be discharged from the lower opening. However, it has been found that after the unit has been running for a period of time, dust easily overflows from the lower opening of the coke hopper, causing environmental pollution in the plant. Utility Model Content
[0003] Therefore, the purpose of this utility model is to provide a stone coal processing device.
[0004] A stone and coal processing device includes: a stone and coal discharge unit, comprising a stone and coal hopper, a stone and coal feed pipe, and a stone and coal discharge valve; the stone and coal hopper has a storage space inside, and its upper and lower ends are respectively provided with a first opening and a second opening communicating with the storage space, the first opening being located above the second opening; one end of the stone and coal feed pipe is used to communicate with a coal mill, and the other end is used to communicate with the first opening; the stone and coal discharge valve is disposed at the second opening, including a first gate plate and a second gate plate; the first gate plate and the second gate plate are arranged at intervals in the vertical direction, and the first gate plate and the second gate plate can enter and exit the stone and coal hopper in the horizontal direction to open or seal the second opening; a dust removal unit is disposed above the first opening for collecting dust in the stone and coal hopper; and a control unit is electrically connected to the stone and coal discharge valve and the dust removal unit respectively, for controlling the opening or closing of the stone and coal discharge valve and the dust removal unit.
[0005] The stone and coal processing device of this utility model is provided with two gate plates at the stone and coal outlet. The first gate plate blocks the stone and coal, and the second gate plate does not directly contact the stone and coal. The two gate plates seal the stone and coal outlet at the same time, which avoids the situation where the sealing surface of the single-layer gate plate is worn by the stone and coal and the sealing is not tight, resulting in dust leakage.
[0006] Furthermore, the stone and coal discharge valve also includes two sets of gate slide rails extending in the horizontal direction, and the two sets of gate slide rails are arranged at intervals in the vertical direction; the first gate plate and the second gate plate are respectively slidably disposed in the two sets of gate slide rails.
[0007] Through the above technical solution, the first gate plate and the second gate plate slide out and / or slide into the stone and coal hopper within the gate slide rail.
[0008] Furthermore, the stone and coal discharge unit also includes a stone and coal feed valve, which is installed on the stone and coal feed pipe and electrically connected to the control unit, for controlling the opening and closing of the stone and coal feed pipe.
[0009] Through the above technical solution, the control unit controls the opening and closing of the stone and coal feeding pipeline through the stone and coal feeding valve.
[0010] Furthermore, the stone and coal discharge unit also includes a spark detector, which is disposed on the stone and coal hopper and close to the first opening.
[0011] Through the above technical solution, the spark detector can detect whether there are sparks in the dust and sound an alarm in time to avoid dust explosion.
[0012] Furthermore, the dust removal unit includes a dust suction hood, a dust discharge pipe, and a dust exhaust fan; the dust suction hood is positioned above the first opening, one end of the dust discharge pipe passes through the dust suction hood and communicates with the storage space, and the other end is communicated with the air inlet of the dust exhaust fan; the dust exhaust fan is electrically connected to the control unit.
[0013] With the above technical solution, when the dust exhaust fan is started, the dust in the stone and coal hopper is extracted and collected through the dust suction hood.
[0014] Furthermore, the dust removal unit also includes a dust discharge valve, which is installed on the dust discharge pipe and electrically connected to the control unit for controlling the opening and closing of the dust discharge pipe.
[0015] Through the above technical solution, the control unit controls the opening and closing of the dust emission pipeline through the dust emission valve.
[0016] Furthermore, the dust removal unit also includes a sealed pipe; a sealed space is provided between the first gate plate and the second gate plate, one end of the sealed pipe extends into the sealed space, the other end is connected to the dust emission pipe, and is located between the dust emission valve and the dust exhaust fan.
[0017] Through the above technical solution, the sealed space is connected to the boiler through a sealed pipe. The negative pressure of the boiler is used to discharge the dust in the sealed space into the boiler through the sealed pipe, which prevents the dust from entering the sealed space when the first gate plate is not sealed tightly and overflowing from the second opening when discharging the stone coal.
[0018] Furthermore, the stone coal processing device also includes a boiler, and the outlet of the dust exhaust fan is connected to the boiler.
[0019] The above technical solution improves economic efficiency by re-combusting dust in a boiler.
[0020] Furthermore, the stone coal processing device also includes an annular boiler feed pipe, the inlet of which is connected to the outlet of the dust exhaust fan, and a number of discharge pipes are evenly arranged around its circumference, with the discharge pipes extending into the boiler.
[0021] Through the above technical solution, multiple discharge pipes will evenly spray the collected dust in four directions, ensuring a uniform temperature field and stable combustion in the boiler, and avoiding local high-temperature coking.
[0022] Furthermore, the stone coal processing device also includes a check valve, which is located between the inlet of the annular boiler feed pipe and the outlet of the dust exhaust fan.
[0023] The above technical solution creates a one-way channel between the dust exhaust fan and the annular boiler feed pipe, preventing dust backflow.
[0024] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description
[0025] Figure 1 A schematic diagram of the overall structure of the stone and coal processing device provided by this utility model;
[0026] Figure 2 A schematic diagram of the spatial structure of the stone and coal hopper provided by this utility model;
[0027] Figure 3 A schematic diagram of the spatial structure of the stone and coal discharge valve provided by this utility model;
[0028] Figure 4 This is a schematic diagram of the spatial structure of the annular boiler feed pipe provided by this utility model. Detailed Implementation
[0029] The applicant studied the existing stone and coal discharge device and found that the reason why dust overflows from the lower opening of the stone and coal hopper after the unit has been running for a period of time is that the lower opening of the stone and coal hopper is only sealed with a single-layer gate plate. Due to the high hardness of stone and coal, when it enters from the upper opening of the stone and coal hopper and collides with the gate plate, it is easy to wear down the sealing surface of the gate plate and cause impact to the gate plate used for sealing, resulting in poor sealing of the lower opening, so that dust overflows from the lower opening of the stone and coal hopper.
[0030] Based on this, the applicant proposes a stone and coal handling device, which uses a first gate plate and a second gate plate spaced apart at the second opening of the stone and coal hopper. Stones and coal enter the stone and coal hopper through the first opening and are temporarily stored inside the hopper due to being blocked by the first gate plate. Even if the first gate plate wears down and becomes loose, the second gate plate can still seal the second opening, effectively preventing dust from overflowing. The following is one embodiment of the stone and coal discharge device provided in this application:
[0031] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of the overall structure of the stone and coal processing device provided by this utility model; Figure 2 A schematic diagram of the spatial structure of the stone and coal hopper provided by this utility model; Figure 3 A schematic diagram of the spatial structure of the stone and coal discharge valve provided by this utility model; Figure 4 This is a schematic diagram of the spatial structure of the annular boiler feed pipe provided by this utility model.
[0032] This utility model provides a stone and coal processing device, including a stone and coal discharge unit 1, a dust removal unit 2, a dust treatment unit 3, and a control unit (not shown).
[0033] The stone and coal discharge unit 1 is used to collect and discharge the stone and coal generated during the operation of the coal mill, and includes a stone and coal hopper 11, a stone and coal feed pipe 12, and a stone and coal discharge valve 13. The stone and coal hopper 11 is a frame with four sides sealed and a first opening 111 and a second opening 112 at the top and bottom ends, respectively. It has a storage space 110 inside for temporarily storing stone and coal. One end of the stone and coal feed pipe 12 is connected to the coal mill, and the other end is connected to the first opening 111. The stone and coal generated during the operation of the coal mill enters the stone and coal hopper 11 through the stone and coal feed pipe 12.
[0034] The stone and coal discharge valve 13 is located at the second opening 112, sealing or opening the second opening 112. It includes two sets of gate rails 131, a first gate plate 132, a second gate plate 133, and a gate actuator 134. The two sets of gate rails 131 are arranged at a certain distance apart in the vertical direction. Each set of gate rails 131 includes two gate rails 131, which are respectively located on two opposite inner sides of the stone and coal hopper 11 and extend in the horizontal direction.
[0035] The first gate plate 132 and the second gate plate 133 are slidably mounted on two sets of gate slide rails 131, respectively, and can extend out of the stone and coal hopper 11 along the extending direction of the gate slide rails 131. In this embodiment, the first gate plate 132 is located above the second gate plate 133. When the first gate plate 132 and the second gate plate 133 are located inside the stone and coal hopper 11, a sealed space 130 is formed between the first gate plate 132, the second gate plate 133 and the side wall of the stone and coal hopper 11. At this time, the stone and coal discharge valve 13 is in the closed state, and the stone and coal are blocked by the first gate plate 132 and stored in the storage space 110. When the first gate plate 132 and the second gate plate 133 extend out of the stone and coal hopper 11, the stone and coal discharge valve 13 is in the open state, and the stone and coal are discharged out of the stone and coal hopper 11 from the second opening 112.
[0036] The gate actuator 134 is fixedly connected to the first gate plate 132 and the second gate plate 133 respectively, and is used to pull the first gate plate 132 and the second gate plate 133 to slide along the gate slide rail 131. An electric telescopic rod, as used in the prior art, can be used. The gate actuator 134 is electrically connected to the control unit, and the control unit controls the working state of the gate actuator 134. In one embodiment, the same gate actuator 134 simultaneously drives the first gate plate 132 and the second gate plate 133 to move in the same direction; in another embodiment, two gate actuators 134 are respectively connected to the first gate plate 132 and the second gate plate 133, so that the first gate plate 132 and the second gate plate 133 can move at different times and in different directions.
[0037] Furthermore, the stone and coal discharge valve 13 also includes a displacement sensor 135, which is mounted on the gate actuator 134 and electrically connected to the control unit. The displacement sensor 135 can be a grating displacement sensor from the prior art, used to detect the push-pull distance of the gate actuator 134 and provide feedback to the control unit.
[0038] Furthermore, the stone and coal discharge unit 1 also includes a stone and coal feed valve 14, which is installed on the stone and coal feed pipe 12 and electrically connected to the control unit for controlling the opening and closing of the stone and coal feed pipe 12.
[0039] Furthermore, the stone and coal discharge unit 1 also includes a spark detector 15, which is disposed on the side wall of the stone and coal hopper 11 and close to the first opening 111. The spark detector 15 is used to detect whether there are sparks in the dust, so as to prevent the stone and coal stored in the stone and coal hopper 11 from rubbing against each other and causing a dust explosion accident when they are not discharged in time.
[0040] The dust removal unit 2 is used to remove dust escaping from the stone and coal hopper 11, and includes a dust suction hood 21, a dust discharge pipe 22, and a dust exhaust fan 23. The dust suction hood 21 is slightly larger than the first opening 111 and covers the first opening 111. The cross-sectional area of the dust suction hood 21 gradually decreases from bottom to top, making the dust suction hood 21 conical in shape. The dust suction hood 21, the first gate plate 132, and the side wall of the stone and coal hopper 11 enclose a storage space 110. The stone and coal feed pipe 12 passes through the dust suction hood 21 and extends into the storage space 110. One end of the dust discharge pipe 22 passes through the dust suction hood 21 and communicates with the storage space 110, and the other end communicates with the air inlet of the dust exhaust fan 23. The air outlet of the dust exhaust fan 23 communicates with the dust treatment unit 3 and is electrically connected to the control unit. The control unit controls the dust exhaust fan 23 to open or close. When the dust exhaust fan 23 is open, the dust in the storage space 110 is sucked up by the dust suction hood 21 and transferred to the dust treatment unit 3.
[0041] Furthermore, the dust removal unit 2 also includes a dust discharge valve 24, which is installed on the dust discharge pipe 22 and electrically connected to the control unit for controlling the opening and closing of the dust discharge pipe 22.
[0042] The dust treatment unit 3 includes a boiler 31 and an annular boiler feed pipe 32. The boiler 31 is used to burn the dust collected by the dust removal unit 2, allowing the dust to be reused as fuel, reducing pollution and cost waste. Its structure is existing technology and will not be described in detail here. The annular boiler feed pipe 32 is made of bent stainless steel pipe connected end to end. Its inlet is connected to the air outlet of the dust exhaust fan 23, and several discharge pipes 321 are evenly arranged around the annular boiler feed pipe 32. The discharge pipes 321 extend into the boiler 31 and spray the collected dust evenly in four directions, ensuring a uniform temperature field and stable combustion in the boiler 31 and avoiding local high-temperature coking. In this embodiment, there are four discharge pipes 321.
[0043] Furthermore, the dust removal unit 2 also includes a sealed pipe 25. One end of the sealed pipe 25 passes through the side wall of the stone and coal hopper 11 and extends into the sealed space 130, while the other end is connected to the dust emission pipe 22 and located between the dust emission valve 24 and the dust exhaust fan 23. That is, the sealed space 130 is connected to the boiler 31 through the sealed pipe 25. Since the boiler 31 operates under a slight negative pressure, the connection between the sealed space 130 and the boiler 31 via the sealed pipe 25 ensures that the sealed chamber always maintains a slight negative pressure. This discharges the dust and gas leaking into the sealed space 130 into the boiler 31, preventing dust from overflowing from the second opening 112 and polluting the external environment when discharging stone and coal.
[0044] Furthermore, the dust treatment unit 3 also includes a check valve 33, which is installed between the inlet of the annular boiler feed pipe 32 and the outlet of the dust exhaust fan 23 to prevent dust backflow.
[0045] The control unit is electrically connected to the gate actuator 134, the displacement sensor 135, the stone and coal feed valve 14, the spark detector 15, the dust exhaust fan 23, and the dust discharge valve 24, respectively, and is used to monitor and control the working status of each component. The control unit can be a PLC controller of existing technology, which has a built-in setting program and controls the operation of each component according to the setting program. In this embodiment, the stone and coal feed valve 14, the gate actuator 134, the dust exhaust fan 23, and the dust discharge valve 24 are interlocked. When the stone and coal feed valve 14 is open, the dust exhaust fan 23 and the dust discharge valve 24 are closed, and the valve actuator 134 pushes the first gate plate 132 and the second gate plate 133 into the stone and coal hopper 11, so that the stone and coal discharge valve 13 is in the closed state. When the stone and coal feed valve 14 is closed, the dust exhaust fan 23 and the dust discharge valve 24 are open, and the valve actuator pulls the first gate plate 132 and the second gate plate 133 out of the stone and coal hopper 11, so that the stone and coal discharge valve 13 is in the open state.
[0046] The stone and coal processing device provided by this utility model has two working modes: stone and coal storage mode and stone and coal discharge mode. The specific working principle is as follows:
[0047] (1) Stone and coal storage mode: The control unit controls the stone and coal feeding valve 14 to open, the dust exhaust fan 23 and the dust discharge valve 24 to close, and the gate pusher 134 pushes the first gate plate 132 and the second gate plate 133 into the stone and coal hopper 11 to seal the second opening 112. At this time, the stone and coal enter the stone and coal hopper 11 from the stone and coal feeding pipe 12 and are temporarily stored in the storage space 110.
[0048] (2) Stone and coal discharge mode: The control unit controls the stone and coal feed valve 14 to close, the dust discharge valve 24 and the dust exhaust fan 23 to open, the gate pusher 134 pulls the first gate plate 132 and the second gate plate 133 to slide out of the stone and coal hopper 11, opening the second opening 112. At this time, the dust exhaust fan 23 collects the dust in the stone and coal hopper 11 through the dust suction hood 21, and the stone and coal temporarily stored in the storage space 110 is discharged through the second opening 112.
[0049] Compared with existing technologies, the stone and coal processing device provided by this utility model has the following advantages:
[0050] (1) The stone and coal discharge valve 13 is provided with a first gate plate 132 and a second gate plate 133 spaced apart. The double gate plate design effectively avoids the situation where the first gate plate 132, which is in direct contact with the stone and coal, is worn by the stone and coal when the stone and coal discharge valve 13 is closed, resulting in poor sealing and dust leakage.
[0051] (2) The sealed space 130 between the first gate plate 132 and the second gate plate 133 is connected to the boiler 31 through the sealed pipe 25. The boiler 31 in negative pressure operation state can allow the dust and gas that leak into the sealed space 130 to enter the boiler 31 through the sealed pipe 25, so as to prevent the dust from overflowing from the second opening 112 when the stone coal discharge valve 13 is opened to discharge the stone coal.
[0052] (3) By using the dust collection hood 21, the dust exhaust fan 23 and the boiler 31 together, the dust contained in the coal can be recovered and reused, thereby improving economic efficiency.
[0053] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.
Claims
1. A stone and coal processing device, characterized in that, include: The stone and coal discharge unit includes a stone and coal hopper, a stone and coal feed pipe, and a stone and coal discharge valve; the stone and coal hopper has a storage space inside, and its upper and lower ends are respectively provided with a first opening and a second opening communicating with the storage space, with the first opening located above the second opening; one end of the stone and coal feed pipe is used to communicate with a coal mill, and the other end is connected to the first opening; The stone and coal discharge valve is located at the second opening and includes a first gate plate and a second gate plate. The first gate plate and the second gate plate are arranged at intervals in the vertical direction, and the first gate plate and the second gate plate can enter and exit the stone and coal hopper in the horizontal direction to open or seal the second opening. A dust removal unit is installed above the first opening to collect dust from the stone and coal hopper. The control unit is electrically connected to the stone and coal discharge valve and the dust removal unit respectively, and is used to control the opening or closing of the stone and coal discharge valve and the dust removal unit.
2. The stone and coal processing device according to claim 1, characterized in that: The stone and coal discharge valve also includes two sets of gate slide rails extending in the horizontal direction, and the two sets of gate slide rails are arranged at intervals in the vertical direction. The first gate plate and the second gate plate are respectively slidably disposed in two sets of gate slide rails.
3. The stone and coal processing device according to claim 1, characterized in that: The stone and coal discharge unit also includes a stone and coal feed valve, which is installed on the stone and coal feed pipe and electrically connected to the control unit, for controlling the opening and closing of the stone and coal feed pipe.
4. The stone and coal processing device according to claim 1, characterized in that: The stone and coal discharge unit also includes a spark detector, which is installed on the stone and coal hopper and close to the first opening.
5. The stone and coal processing device according to claim 1, characterized in that: The dust removal unit includes a dust suction hood, a dust discharge pipe, and a dust exhaust fan; the dust suction hood is positioned above the first opening, one end of the dust discharge pipe passes through the dust suction hood and communicates with the storage space, and the other end is communicated with the air inlet of the dust exhaust fan; the dust exhaust fan is electrically connected to the control unit.
6. The stone and coal processing device according to claim 5, characterized in that: The dust removal unit also includes a dust discharge valve, which is installed on the dust discharge pipe and electrically connected to the control unit for controlling the opening and closing of the dust discharge pipe.
7. The stone and coal processing device according to claim 6, characterized in that: The dust removal unit also includes a sealed pipe; a sealed space is provided between the first gate plate and the second gate plate, one end of the sealed pipe extends into the sealed space, the other end is connected to the dust emission pipe, and it is located between the dust emission valve and the dust exhaust fan.
8. The stone and coal processing device according to claim 5, characterized in that: It also includes a boiler, which is connected to the air outlet of the dust exhaust fan.
9. The stone and coal processing device according to claim 8, characterized in that: It also includes an annular boiler feed pipe, the inlet of which is connected to the outlet of the dust exhaust fan, and several discharge pipes are evenly arranged around its circumference, with the discharge pipes extending into the boiler.
10. The stone and coal processing device according to claim 9, characterized in that: It also includes a check valve, which is disposed between the inlet of the annular boiler feed pipe and the outlet of the dust exhaust fan.