Small pulverized coal combustion boiler unit

Abstract

The utility model relates to the technical field of pulverized coal fired boiler feeding, and discloses a small pulverized coal fired boiler unit which comprises a feeding box, a storage box is fixedly installed on the right side of the top of the feeding box, a pulverized coal recycling box is fixedly installed at the right end of the feeding box, and a feeding mechanism is arranged in the feeding box. A discharging opening is formed in the connecting position of the storage box and the feeding box, a material flattening plate is fixedly installed below the left side of the discharging opening, and the right end of the feeding box communicates with the bottom of the left side of the pulverized coal recycling box. By arranging the feeding box, the material receiving plate, the feeding mechanism, the first conveying crawler belt, the material carrying box, the pulverized coal recycling box, a second driving roller, a second conveying crawler belt, a second motor, a recycling plate and the like, feeding is uniform, the problem that the normal work of the device is affected due to accumulation of pulverized coal in the feeding assembly can be avoided, waste of the pulverized coal can be avoided, and the service life of the device is prolonged. The device has the capability of automatically recovering the pulverized coal, and the pulverized coal can be placed into the storage box again.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverized coal boiler feeding, in particular to a small pulverized coal combustion boiler unit. Background Art

[0002] Pulverized coal boilers increase the combustion rate of coal, are highly efficient and energy-saving, and are easy to start and stop. They consist of a furnace, a burner, an ignition device, etc. Although China is actively expanding the use of clean energy, pulverized coal industrial boilers are still the most important heating equipment at present;

[0003] The existing pulverized coal boiler has certain problems in the powder feeding system during actual operation. From the actual operation situation, there is a problem of uneven coal powder feeding, which will cause the problem of unstable furnace outlet pressure. Most of the existing feeding structures use spiral rods for feeding. Although a mechanical sealing mechanism is set in the feeding spiral, the particle size of the pulverized coal is relatively small and is easily affected by the impact of unloading, so the sealing effect is relatively limited, which causes the coal powder to easily penetrate into the bearing, affecting the normal operation of the device and causing certain waste. Summary of the invention

[0004] In view of the deficiencies in the prior art, the utility model provides a small pulverized coal combustion boiler unit, which has the advantages of uniform feeding, avoiding the problem of pulverized coal accumulation in the feeding component affecting the normal operation of the device, avoiding the waste of pulverized coal, and having the ability to automatically recycle pulverized coal and put the pulverized coal back into the storage box, etc., solving the problems of uneven feeding of the pulverized coal feeding system in the actual operation of the existing pulverized coal boilers, which easily affects the normal operation of the device and causes waste.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a small pulverized coal combustion boiler unit, comprising a feed box, a storage box is fixedly installed on the top right side of the feed box, a pulverized coal recovery box is fixedly installed on the right end of the feed box, a feeding mechanism is arranged inside the feed box, a discharge port is opened at the connection between the storage box and the feed box, a flat material plate is fixedly installed on the lower left side of the discharge port, and the right end of the feed box is communicated with the left bottom of the coal recovery box.

[0006] Preferably, a discharge port is provided at the left end of the feeding box, and a receiving plate is fixedly installed at the bottom of the discharge port, and the receiving plate is inclined upward, and the receiving plate will not hinder the operation of the feeding mechanism.

[0007] Preferably, the feeding mechanism is composed of a first driving roller, a first conveying crawler and a first motor. The first driving roller is provided in two groups. The first conveying crawler is sleeved on the two groups of first driving rollers, and matching crawler teeth are provided between the first driving roller and the first conveying crawler. The output shaft of the first motor passes through the feeding box and is connected to the first driving roller.

[0008] Preferably, a material loading box and a material sweeping plate are fixedly mounted on the surface of the first conveying crawler, the material sweeping plate is located between the two groups of material loading boxes, and bristles are arranged on the top of the material sweeping plate.

[0009] Preferably, the height of the loading box is flush with the flattening plate, which can sweep away the coal powder loaded in the loading box without hindering the forward movement of the loading box, and the plate structure height of the sweeping plate is lower than the height of the discharge port.

[0010] Preferably, a recovery mechanism is provided inside the coal powder recovery box, a material receiving trough is provided above the connection between the coal powder recovery box and the storage box, the bottom of the connection between the coal powder recovery box and the feeding box is inclined to the right, and a material injection port is provided on the top of the storage box.

[0011] Preferably, the recovery mechanism is composed of a second drive roller, a second conveyor belt, and a second motor. The second drive roller is provided with two groups. The second conveyor belt is sleeved on the two groups of second drive rollers, and matching track teeth are provided between the second drive roller and the second conveyor belt. The output shaft of the second motor passes through the coal powder recovery box and is connected to the second drive roller.

[0012] Preferably, a recovery plate is provided on the surface of the second conveying crawler, and the recovery plate is inclined.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. This small pulverized coal combustion boiler unit is provided with a feeding box, in which a receiving plate, a feeding mechanism, a first conveying crawler, a loading box and other devices are installed, and a flattening plate is provided at the discharge port of the storage box. The flattening plate can sweep the pulverized coal in the loading box to ensure that the load of pulverized coal in each loading box is the same, thereby achieving the purpose of uniform feeding, and the arrangement of structures such as the sweeping plate can avoid the problem of pulverized coal being accumulated in the feeding component to affect the normal operation of the device, and can avoid the waste of pulverized coal.

[0015] 2. This small pulverized coal combustion boiler unit has the ability to automatically recycle pulverized coal by setting up a pulverized coal recovery box and installing a second drive roller, a second conveyor belt, a second motor, a recovery plate and other devices in the pulverized coal recovery box. The pulverized coal recovered in the feed box can be placed back into the storage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of the feeding device of the pulverized coal combustion boiler of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the feeding device of the utility model;

[0019] Figure 3 This is a schematic diagram of the feeding mechanism structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the recycling mechanism of the utility model.

[0021] Description of reference numerals:

[0022] 1. Feed box; 11. Discharge port; 12. Receiving plate; 13. Feeding mechanism; 131. First drive roller; 132. First conveyor belt; 133. Loading box; 134. Sweeping plate; 135. First motor; 2. Storage box; 21. Filling port; 22. Discharge port; 23. Flat plate; 24. Receiving trough; 3. Coal powder recovery box; 31. Recovery mechanism; 311. Second drive roller; 312. Second conveyor belt; 313. Second motor; 314. Recovery plate. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 4 , the utility model provides a technical solution:

[0025] A small pulverized coal combustion boiler unit comprises a feed box 1, a storage box 2 is fixedly installed on the top right side of the feed box 1, a pulverized coal recovery box 3 is fixedly installed on the right end of the feed box 1, a feeding mechanism 13 is arranged inside the feed box 1, a feed opening 22 is provided at the connection between the storage box 2 and the feed box 1, a flat material plate 23 is fixedly installed at the lower left side of the feed opening 22, the right end of the feed box 1 is communicated with the left bottom of the pulverized coal recovery box 3, a discharge port 11 is provided at the left end of the feed box 1, and a The receiving plate 12 is tilted upward, and the receiving plate 12 will not hinder the operation of the feeding mechanism 13. The feeding mechanism 13 is composed of a first driving roller 131, a first conveying crawler 132, and a first motor 135. The first driving roller 131 is provided with two groups, and the first conveying crawler 132 is sleeved on the two groups of first driving rollers 131. Matching crawler teeth are provided between the first driving roller 131 and the first conveying crawler 132. The output shaft of the first motor 135 passes through the feeding box 1 and is connected to the first driving roller 131.

[0026] By adopting the above technical solution, when in use, the coal powder is first injected into the storage box 2 through the injection port 21, so that the storage box 2 is filled with coal powder to supply the material box 1 for loading and use, and the coal powder in the storage box 2 will flow downward through the discharge port 22. At this time, the first motor 135 and the second motor 313 are turned on to make them work, and the first motor 135 drives the first driving roller 131 to rotate, and the first driving roller 131 drives the first conveying crawler 132 to rotate. When the first conveying crawler 132 rotates, it will drive the surface loading box 133 and the sweeping plate 134 to rotate, and the coal powder will flow into the loading box 133 below through the discharge port 22, and will also fall onto the first conveying crawler 132. Under normal conditions, part of the coal powder loaded in the loading box 133 will overflow, and the box mouth of the loading box 133 is bulging. As the first conveying crawler 132 continues to move forward, When it contacts the flat material plate 23, the flat material plate 23 can scrape off the bulging coal powder in the loading box 133, thereby ensuring that the amount of coal powder loaded in each loading box 133 is the same, and the purpose of uniform feeding is achieved. As the first conveyor crawler 132 moves forward, the coal powder loaded in the loading box 133 is finally discharged through the discharge port 11, and the coal powder received on the surface of the first conveyor crawler 132 will fall onto the receiving plate 12. The surface of the first conveyor crawler 132 is located between the loading boxes 133 and is provided with a sweeping plate 134. The sweeping plate 134 rotates with the first conveyor crawler 132. When the first conveyor crawler 132 rotates to the bottom, the coal powder collected by the receiving plate 12 can be swept backwards, thereby achieving the purpose of collecting the coal powder backwards, and at the same time ensuring the working state in the feeding box 1, avoiding coal powder accumulation affecting the operation of the device, and avoiding coal powder waste. The purpose of uniform feeding is achieved through the above design.

[0027] Specifically, Figure 2 and Figure 4 As shown, a loading box 133 and a sweeping plate 134 are fixedly installed on the surface of the first conveyor crawler 132. The sweeping plate 134 is located between the two groups of loading boxes 133, and a brush is arranged on the top of the sweeping plate 134. The height of the loading box 133 is flush with the flat plate 23. The flat plate 23 can sweep the coal powder loaded in the loading box 133 but will not hinder the loading box 133 from moving forward. The plate structure height of the sweeping plate 134 is lower than the height of the discharge port 22. A recovery mechanism 31 is arranged inside the coal powder recovery box 3. A receiving trough 24 is provided above the connection between the coal powder recovery box 3 and the storage box 2. The coal powder recovery box 3 is connected to the feeding box 1 The bottom of the connection is inclined to the right, and a filling port 21 is provided on the top of the storage box 2. The recovery mechanism 31 is composed of a second driving roller 311, a second conveying crawler 312, and a second motor 313. The second driving roller 311 is provided with two groups, and the second conveying crawler 312 is sleeved on the two groups of second driving rollers 311, and matching crawler teeth are provided between the second driving roller 311 and the second conveying crawler 312. The output shaft of the second motor 313 passes through the coal powder recovery box 3 and is connected to the second driving roller 311. The surface of the second conveying crawler 312 is provided with a recovery plate 314, and the recovery plate 314 is inclined.

[0028] By adopting the above technical solution, during the loading process of the feed box 1, the coal powder will directly flow onto the first conveyor crawler 132 due to the flat material plate 23, and will also fall onto the first conveyor crawler 132 due to the scraping of the flat material plate 23. When the first conveyor crawler 132 moves forward and turns to the corner, the coal powder in the loading box 133 will be poured out, and at the same time, the coal powder on the first conveyor crawler 132 will also fall onto the receiving plate 12 below and the bottom plate in the feed box 1. The sweeping plate 134 can sweep the fallen coal powder to the rear of the feed box 1 with the movement of the first conveyor crawler 132 until the coal powder is swept to the connection between the feed box 1 and the coal powder recovery box 3, and because the connection is concave, the coal powder is automatically The coal powder flows to the bottom of the coal powder recovery box 3, and the second motor 313 drives the second driving roller 311 to rotate. The second driving roller 311 mobilizes the second conveying crawler 312 to rotate, and the second conveying crawler 312 drives the recovery plate 314 on the surface to rotate in the coal powder recovery box 3. When rotating, the recovery plate 314 can scoop up the coal powder at the bottom of the coal powder recovery box 3 and climb with the recovery plate 314 until the recovery plate 314 climbs to the top and then descends. At this time, the coal powder can enter the storage box 2 again through the collecting trough 24 to complete the cycle, and process the coal powder accumulated in the feeding box 1, so as to avoid the accumulation of coal powder in the device, which not only wastes coal powder but also affects the parts in the component.

[0029] Working principle: When in use, first inject the coal powder into the storage box 2 through the injection port 21, so that the storage box 2 is filled with coal powder to supply the material box 1 for loading, and the coal powder in the storage box 2 will flow downward through the discharge port 22. At this time, turn on the first motor 135 and the second motor 313 to make them work, and the first motor 135 drives the first driving roller 131 to rotate, and the first driving roller 131 drives the first conveying crawler 132 to rotate. When the first conveying crawler 132 rotates, it will drive the loading box 133 and the sweeping plate 134 on the surface to rotate, and the coal powder will flow into the loading box 133 below through the discharge port 22, and will also fall onto the first conveying crawler 132. Under normal conditions, part of the coal powder loaded in the loading box 133 will overflow, and the loading box 133 will be The box mouth is bulging, and the loading box 133 will contact the flat material plate 23 as the first conveyor belt 132 continues to move forward. The flat material plate 23 can scrape off the bulging coal powder in the loading box 133, thereby ensuring that the amount of coal powder loaded in each loading box 133 is the same, thereby achieving the purpose of uniform feeding. As the first conveyor belt 132 moves forward, the coal powder loaded in the loading box 133 is finally discharged through the discharge port 11, and the coal powder received on the surface of the first conveyor belt 132 will fall onto the receiving plate 12. The surface of the first conveyor belt 132 is located between the loading boxes 133 and is provided with a sweeping plate 134. The sweeping plate 134 rotates with the first conveyor belt 132. When the first conveyor belt 132 rotates to the bottom, the coal powder collected by the receiving plate 12 can be swept backwards. The purpose of collecting the coal powder to the rear is achieved, while ensuring the working state in the feeding box 1, avoiding the accumulation of coal powder affecting the operation of the device, and avoiding the waste of coal powder. The purpose of even feeding is achieved through the above design. During the feeding process of the feeding box 1, the coal powder will directly flow onto the first conveying crawler 132 due to the flat material plate 23, and will also fall onto the first conveying crawler 132 due to the scraping of the flat material plate 23. When the first conveying crawler 132 moves forward and turns to the turning point, the coal powder in the loading box 133 will be poured out, and at the same time, the coal powder on the first conveying crawler 132 will also fall onto the receiving plate 12 below and the bottom plate in the feeding box 1. The sweeping plate 134 can sweep the fallen coal powder to the rear of the feeding box 1 with the movement of the first conveying crawler 132 until the coal powder is swept to the feeding box The connection between box 1 and the coal powder recovery box 3 is concave, so the coal powder automatically flows to the bottom of the coal powder recovery box 3, and the second motor 313 drives the second driving roller 311 to rotate, and the second driving roller 311 mobilizes the second conveying crawler 312 to rotate, and the second conveying crawler 312 drives the recovery plate 314 on the surface to rotate in the coal powder recovery box 3. When rotating, the recovery plate 314 can collect the coal powder at the bottom of the coal powder recovery box 3 and climb with the recovery plate 314 until the recovery plate 314 climbs to the top and then descends. At this time, the coal powder can enter the storage box 2 again through the collecting trough 24 to complete the cycle, and process the coal powder accumulated in the feeding box 1, so as to avoid the accumulation of coal powder in the device, which not only wastes coal powder but also affects the parts in the component.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A small pulverized coal combustion boiler unit, comprising a feed box (1), characterized in that: A storage box (2) is fixedly installed on the top right side of the feeding box (1), a coal powder recovery box (3) is fixedly installed on the right end of the feeding box (1), a feeding mechanism (13) is arranged inside the feeding box (1), a feed opening (22) is provided at the connection between the storage box (2) and the feeding box (1), a flat material plate (23) is fixedly installed at the lower left side of the feed opening (22), and the right end of the feeding box (1) is communicated with the left bottom of the coal powder recovery box (3).

2. A small pulverized coal combustion boiler unit according to claim 1, characterized in that: The left end of the feeding box (1) is provided with a discharge port (11), and a receiving plate (12) is fixedly installed at the bottom of the discharge port (11), and the receiving plate (12) is inclined upward, and the receiving plate (12) will not hinder the operation of the feeding mechanism (13).

3. A small pulverized coal combustion boiler unit according to claim 2, characterized in that: The feeding mechanism (13) is composed of a first driving roller (131), a first conveying crawler (132), and a first motor (135); the first driving roller (131) is provided with two groups; the first conveying crawler (132) is sleeved on the two groups of first driving rollers (131); matching crawler teeth are provided between the first driving roller (131) and the first conveying crawler (132); and the output shaft of the first motor (135) passes through the feeding box (1) and is connected to the first driving roller (131).

4. A small pulverized coal combustion boiler unit according to claim 3, characterized in that: A material loading box (133) and a material sweeping plate (134) are fixedly mounted on the surface of the first conveying crawler (132); the material sweeping plate (134) is located between two groups of material loading boxes (133), and bristles are arranged on the top of the material sweeping plate (134).

5. A small pulverized coal combustion boiler unit according to claim 4, characterized in that: The height of the material loading box (133) is flush with the leveling plate (23), and the leveling plate (23) can sweep away the coal powder loaded in the material loading box (133) without hindering the forward movement of the material loading box (133). The plate structure height of the sweeping plate (134) is lower than the height of the discharge port (22).

6. A small pulverized coal combustion boiler unit according to claim 1, characterized in that: A recovery mechanism (31) is provided inside the coal powder recovery box (3), a material receiving trough (24) is provided above the connection between the coal powder recovery box (3) and the material storage box (2), the bottom of the connection between the coal powder recovery box (3) and the material feeding box (1) is inclined to the right, and a material injection port (21) is provided at the top of the material storage box (2).

7. A small pulverized coal combustion boiler unit according to claim 6, characterized in that: The recovery mechanism (31) is composed of a second driving roller (311), a second conveying crawler (312), and a second motor (313); the second driving roller (311) is provided with two groups; the second conveying crawler (312) is sleeved on the two groups of second driving rollers (311); matching crawler teeth are provided between the second driving roller (311) and the second conveying crawler (312); and the output shaft of the second motor (313) passes through the coal powder recovery box (3) and is connected to the second driving roller (311).

8. A small pulverized coal combustion boiler unit according to claim 7, characterized in that: A recovery plate (314) is provided on the surface of the second conveying crawler belt (312), and the recovery plate (314) is inclined.

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