Pulverized coal discharging device of pulverized coal bunker

Abstract

The utility model belongs to the technical field of thermal power generation, and particularly relates to a powder discharging device of a pulverized coal bunker, which comprises a bearing plate, a plurality of supporting rods transversely arranged on the bearing plate, a powder storage box arranged at the tops of the supporting rods, powder receiving pipes connected to the top of the powder storage box, and powder discharging pipes arranged in one-to-one correspondence with the powder receiving pipes. The powder receiving pipe is detachably connected to the powder discharging pipe through a dismounting assembly, a connecting pipe is horizontally connected between every two adjacent powder storage boxes, the powder storage box located at one end is further connected with a powder pumping pipe, and the powder pumping pipe is connected with an inlet pipe of an adjacent furnace. Pulverized coal in the pulverized coal bin is conveyed into the pulverized coal storage box through the pulverized coal receiving pipe, then the pulverized coal is conveyed into the adjacent furnace through the pulverized coal pumping pipe and the connecting pipe to be combusted, only the pulverized coal discharging pipe and the pulverized coal receiving pipe need to be connected together during pulverized coal discharging, the pulverized coal pumping pipe and an inlet pipe of the adjacent furnace need to be connected together, the pulverized coal discharging process is rapid and convenient, and the pulverized coal discharging efficiency is improved. And all the pulverized coal enters the adjacent furnace to be combusted, so that the waste of the pulverized coal is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal power generation, and particularly relates to a powder discharging device for a pulverized coal bin. Background Art

[0002] The boiler coal pulverizing system in a thermal power plant is widely involved. The coal pulverizing system is the most important auxiliary system in boiler combustion. The safe and stable operation of the coal pulverizing system directly affects the operation efficiency of the boiler. At present, an intermediate storage bin type coal pulverizing system is generally adopted. The coal pulverizing system first stores the prepared pulverized coal in the pulverized coal bin, and then, according to the load requirement of the boiler, takes out the pulverized coal from the pulverized coal bin. The pulverized coal is sent into the furnace through a feeder for combustion.

[0003] However, during boiler shutdown for maintenance or emergency shutdown, the pulverized coal in the pulverized coal bin has no time to burn, resulting in a large amount of pulverized coal being stored in the bin. Due to the relatively high temperature in the bin, long-term accumulation is extremely likely to cause spontaneous combustion, resulting in material waste and posing a great safety hazard to the equipment and the main structure of the plant. Therefore, during boiler shutdown for maintenance or emergency shutdown, it is necessary to discharge the pulverized coal in the pulverized coal bin. When discharging the powder, it is necessary to first remove the feeder, and then open the slide gate to discharge the powder on the spot. The powder discharging process is extremely cumbersome, and there will be a certain amount of waste when cleaning the discharged pulverized coal. Summary of the Utility Model

[0004] In order to solve the problems in the above background art, the utility model provides a powder discharging device for a pulverized coal bin. The pulverized coal in the pulverized coal bin is transported into a powder storage tank through a powder receiving pipe, and then the pulverized coal is transported into an adjacent furnace for combustion through a powder extraction pipe and a connecting pipe. When discharging the powder, only the powder down pipe and the powder receiving pipe need to be connected together, and the powder extraction pipe and the inlet pipe of the adjacent furnace need to be connected together. The powder discharging process is fast and convenient, and all the pulverized coal enters the adjacent furnace for combustion, reducing the waste of pulverized coal.

[0005] The utility model provides a powder discharging device for a pulverized coal bin, which is arranged below the pulverized coal bin. A plurality of feeders are horizontally arranged at the bottom of the pulverized coal bin, and a powder down pipe is connected to the bottom of the feeder. The device includes a bearing plate, on which a plurality of support rods are horizontally arranged in a row. A powder storage tank is arranged at the top of the support rod. A powder receiving pipe is connected to the top of the powder storage tank. The powder receiving pipes are arranged in one-to-one correspondence with the powder down pipes. The powder receiving pipe is detachably connected to the powder down pipe through a disassembly component. A connecting pipe is horizontally connected between adjacent two powder storage tanks. A powder extraction pipe is also connected to the powder storage tank at one end, and the powder extraction pipe is connected to the inlet pipe of the adjacent furnace.

[0006] Further, the disassembly component includes a locking ring fixed on the top of the powder receiving pipe. Locking plates are arranged at both ends of the locking ring, and the two locking plates are connected together through bolts and nuts.

[0007] Further, a valve is installed on the powder receiving pipe.

[0008] Further, a slider is provided at the bottom of the support rod, a chute is horizontally opened in the bearing plate, the slider is slidably arranged in the chute, a locking component for fixing the position of the support rod is arranged on the support rod, and the connecting pipe is set as a telescopic pipe.

[0009] Further, the connecting pipe is a steel wire hose.

[0010] Further, the locking component includes a fixing plate fixed on the support rod, a threaded rod is vertically threadedly connected in the fixing plate, the threaded rod penetrates through the fixing plate, the bottom end of the threaded rod abuts against the bearing plate, and a rotating rod is arranged at the top end of the threaded rod.

[0011] Further, two groups of locking components are provided, and the two groups of locking components are respectively arranged on both sides of the support rod.

[0012] Further, a plurality of universal wheels with brakes are installed at the bottom of the bearing plate, and a handle for facilitating the pushing of the bearing plate is further arranged at one end of the bearing plate.

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

[0014] (1) When the boiler is shut down for maintenance or emergently shut down, place the powder discharging device under the pulverized coal bin, then connect the powder receiving pipe and the powder discharging pipe together, connect the powder extracting pipe and the inlet pipe of the adjacent boiler together, and then open the plug plate to discharge powder. The pulverized coal first enters the powder storage box through the powder receiving pipe, and then enters the adjacent boiler through the powder extracting pipe and the connecting pipe for combustion. Not only is the powder discharging process faster and more convenient, but also all the pulverized coal enters the adjacent boiler for combustion, reducing the waste of pulverized coal.

[0015] (2) When connecting the powder discharging pipe and the powder receiving pipe, first put the powder receiving pipe on the powder discharging pipe, and then rotate the nut to make the bolt and the nut clamp the two locking plates, so that the locking ring tightly holds the powder discharging pipe, and then the powder receiving pipe and the powder discharging pipe can be connected together. The disassembly component facilitates the detachable connection of the powder receiving pipe and improves the installation efficiency of the powder receiving pipe.

[0016] (3) When the powder receiving pipe and the powder discharging pipe are not in the same vertical direction and cannot be connected, rotate the rotating rod, the rotating rod drives the threaded rod to rotate, and the threaded rod then moves upward away from the bearing plate, and then push the support rod to make the slider move in the chute. When the powder receiving pipe and the powder discharging pipe are in the same vertical direction, rotate the rotating rod in the reverse direction, the threaded rod moves downward and the bottom end abuts against the bearing plate, thereby fixing the support rod and realizing the adjustment of the horizontal position of the powder receiving pipe. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of a powder discharging device for a pulverized coal bin;

[0019] Figure 2 It is Figure 1 an enlarged schematic diagram of part A in

[0020] Figure 3 a schematic diagram of the structure of the locking assembly;

[0021] Explanation of reference numerals: 1, pulverized coal bin; 10, coal feeder; 11, powder discharging pipe; 2, bearing plate; 20, universal wheel; 21, handle; 3, support rod; 30, powder storage tank; 31, powder receiving pipe; 32, valve; 4, disassembly assembly; 40, locking ring; 41, locking plate; 42, bolt; 43, nut; 5, connecting pipe; 6, powder extraction pipe; 7, slider; 70, chute; 8, locking assembly; 80, fixing plate; 81, threaded rod; 82, rotating rod. Detailed implementation manners

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0023] The following will combine the attached Figure 1 to the attached Figure 3 and specific embodiments to elaborate on the present invention in detail.

[0024] Referring to Figures 1-3 , a powder discharging device for a pulverized coal bin provided by the present invention is arranged below the pulverized coal bin 1. A plurality of coal feeders 10 are horizontally installed at the bottom of the pulverized coal bin 1, and a powder discharging pipe 11 is connected to the bottom of each coal feeder 10.

[0025] A powder discharging device for a pulverized coal bin includes a bearing plate 2, on which a plurality of support rods 3 are arranged horizontally. At the top of the support rods 3, a powder storage tank 30 is fixedly connected. At the top of the powder storage tank 30, a powder receiving pipe 31 is connected. The powder receiving pipes 31 are arranged in one-to-one correspondence with the powder discharging pipes 11. A valve 32 is installed on the powder receiving pipe 31, and the valve 32 is used to control the opening and closing of the powder receiving pipe 31.

[0026] At the top of the powder receiving pipe 31, a disassembly component 4 is provided. The powder receiving pipe 31 is detachably connected to the powder discharging pipe 11 through the disassembly component 4. The disassembly component 4 includes a locking ring 40 fixedly installed at the top of the powder receiving pipe 31. The locking ring 40 is sleeved on the powder discharging pipe 11. At both ends of the locking ring 40, locking plates 41 are fixedly connected. A bolt 42 passes through between the two locking plates 41, and a nut 43 is threadedly connected to the bolt 42. The two locking plates 41 are clamped by the bolt 42 and the nut 43, so that the powder receiving pipe 31 is connected to the powder discharging pipe 11.

[0027] A telescopic connecting pipe 5 is connected between adjacent two powder storage tanks 30. In this embodiment, the connecting pipe 5 is a steel wire hose; a powder extraction pipe 6 is also connected to the powder storage tank 30 at one end. The end of the powder extraction pipe 6 far away from the powder storage tank 30 is connected to the inlet pipe (not shown in the figure) of the adjacent furnace; at the bottom end of the support rod 3, a slider 7 is fixedly connected. A chute 70 is horizontally opened on the bearing plate 2, and the slider 7 is slidably arranged in the chute 70, so as to realize the adjustment of the horizontal position of the support rod 3.

[0028] A locking component 8 for fixing the position of the support rod 3 is provided on the support rod 3. The locking component 8 includes a fixing plate 80 fixedly connected to the support rod 3. A threaded rod 81 is vertically threadedly connected in the fixing plate 80. The threaded rod 81 penetrates through the fixing plate 80, and the bottom end of the threaded rod 81 abuts against the bearing plate 2. The top end of the threaded rod 81 is fixedly connected with a rotating rod 82; in this embodiment, the locking component 8 is provided in two groups, and the two groups of locking components 8 are located on both sides of the support rod 3, further improving the stability of the support rod 3.

[0029] A plurality of universal wheels 20 are installed at the bottom of the bearing plate 2. In this embodiment, preferably four universal wheels 20 are provided. The universal wheels 20 facilitate the overall movement of the powder discharging device, improving the flexibility. And each universal wheel 20 is equipped with a brake. When the powder discharging device moves to a specific position, the universal wheel 20 can be locked by the brake, improving the stability of the powder discharging device; at one end of the bearing plate 2, an inclined handle 21 is fixedly connected, and the handle 21 is convenient for pushing the powder discharging device.

[0030] The implementation principle of a powder discharging device for a pulverized coal bin provided by the present utility model is as follows: When the boiler is shut down for maintenance or emergency shutdown, the powder discharging device is pushed below the pulverized coal bin 1 so that the powder receiving pipe 31 is directly opposite to the powder discharging pipe 11. Subsequently, the brakes of the universal wheels 20 are stepped on, and then the powder receiving pipe 31 is sleeved on the powder discharging pipe 11. The nut 43 is screwed to make the locking ring 40 tightly hold the powder discharging pipe 11, thereby connecting the powder receiving pipe 31 to the powder discharging pipe 11. Then, the powder extraction pipe 6 and the inlet pipe of the adjacent furnace are connected together. Subsequently, the slide plate is opened for powder discharging. The pulverized coal first enters the powder storage tank 30 through the powder receiving pipe 31, and then enters the adjacent furnace through the powder extraction pipe 6 and the connecting pipe 5 for combustion. Not only is the powder discharging process faster and more convenient, but also all the pulverized coal enters the adjacent furnace for combustion, reducing the waste of pulverized coal.

[0031] The above further describes the present utility model with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as a limitation on the essence and scope of the present utility model. Various modifications made by those of ordinary skill in the art to the above embodiments after reading this specification all fall within the scope protected by the present utility model.

Claims

1. A pulverized coal bin discharge device is arranged below the pulverized coal bin, a plurality of pulverized coal feeders are arranged transversely at the bottom of the pulverized coal bin, and a pulverized coal lowering pipe is connected to the bottom of the pulverized coal feeder, characterized in that: It includes a carrying plate, on which a plurality of support rods are arranged horizontally, a powder storage box is arranged on the top of the support rods, a powder receiving pipe is connected to the top of the powder storage box, the powder receiving pipe is arranged in a one-to-one correspondence with the lower powder pipe, the powder receiving pipe is detachably connected to the lower powder pipe through a disassembly assembly, a connecting pipe is horizontally connected between two adjacent powder storage boxes, and a powder extraction pipe is also connected to the powder storage box at one end, and the powder extraction pipe is connected to the inlet pipe of an adjacent furnace.

2. The pulverized coal bin discharge device according to claim 1, characterized in that: The disassembly assembly comprises a locking ring fixed on the top of the powder receiving pipe, locking plates are arranged at both ends of the locking ring, and the two locking plates are connected together by bolts and nuts.

3. The pulverized coal bin discharge device according to claim 1, characterized in that: A valve is installed on the powder receiving pipe.

4. The pulverized coal bin discharge device according to claim 1, characterized in that: A slider is provided at the bottom of the support rod, a slide groove is horizontally opened in the bearing plate, the slider is slidably arranged in the slide groove, a locking assembly for fixing the position of the support rod is provided on the support rod, and the connecting pipe is configured as a retractable pipe.

5. The pulverized coal bin discharge device according to claim 4, characterized in that: The connecting pipe is a steel wire hose.

6. The pulverized coal bin discharge device according to claim 4, characterized in that: The locking assembly includes a fixing plate fixed on the supporting rod, a threaded rod is vertically threadedly connected to the fixing plate, the threaded rod passes through the fixing plate, the bottom end of the threaded rod is pressed against the bearing plate, and a rotating rod is arranged at the top end of the threaded rod.

7. The pulverized coal bin discharge device according to claim 6, characterized in that: The locking components are arranged in two groups, and the two groups of locking components are arranged on both sides of the support rod respectively.

8. The pulverized coal bin discharge device according to claim 1, characterized in that: A plurality of universal wheels with brakes are installed at the bottom of the carrying plate, and a handle for pushing the carrying plate is also arranged at one end of the carrying plate.

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