Bin storage device capable of preventing pulverized coal from being accumulated

Abstract

The utility model relates to a storage bin device capable of preventing pulverized coal from being accumulated, which belongs to the technical field of boiler pulverizing equipment and comprises a cooling device arranged in a storage bin and used for dissipating heat of pulverized coal. A side bypass of the discharge port of the stock bin is connected with a suction branch pipe; the outlet of the material suction branch pipe is connected with the input end of the adjacent powder exhauster; the cooling device is used for dissipating heat of accumulated pulverized coal, the pulverized coal is prevented from being accumulated and heated, the material suction branch pipe outputs the pulverized coal in the stock bin in time, and the accumulation amount of the pulverized coal in the stock bin is reduced; and under the combined action of the two, potential safety hazards caused by accumulation of the pulverized coal in the storage bin are eliminated, and the operation stability and safety of the boiler pulverizing system are greatly improved.

Description

Technical Field

[0001] This utility model relates to a coal powder accumulation prevention storage device, belonging to the technical field of boiler pulverizing equipment. Background Technology

[0002] The pulverizing system of a boiler in a thermal power plant involves a wide range of aspects. The pulverizing system is an important auxiliary system in the boiler operation process, and its normal operation directly affects the boiler's operating efficiency. At present, the intermediate storage pulverizing system is commonly used in the plant. The pulverizing system first stores the prepared pulverized coal in the pulverized coal silo, and then, according to the boiler load requirements, the pulverized coal is sent into the furnace for combustion using a pulverizer. The working process of the intermediate storage pulverizing system is also described in Chinese utility model patent with authorization announcement number CN202220929265.X.

[0003] During boiler shutdown for maintenance or emergency shutdown, the pulverizer corresponding to the storage silo stops operating, and the pulverized coal in the storage silo stops being transported out, resulting in a large amount of pulverized coal accumulating in the storage silo. Since the pulverized coal is at a high temperature after preliminary processing, coupled with the high workshop temperature, the long-term accumulation of pulverized coal is very likely to cause spontaneous combustion, which brings great safety hazards to the boiler workshop. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a coal dust accumulation storage device to prevent coal dust from accumulating in the storage silo during boiler maintenance and shutdown, and to eliminate the safety hazards caused by coal dust accumulation.

[0005] This utility model discloses a coal powder accumulation prevention storage device, comprising: several sets of parallel coal powder discharge machines, and several coal powder storage bins corresponding to the coal powder discharge machines. The input end of the coal powder discharge machine is connected to the discharge port of the corresponding bin through a pipe.

[0006] The silo is equipped with a cooling device for dissipating heat from the pulverized coal; a suction branch pipe is connected to the side of the silo outlet; the outlet of the suction branch pipe is connected to the input end of the adjacent pulverizer.

[0007] The cooling device includes: a fan duct, with several air inlet pipes evenly distributed on the lower side of the fan duct for introducing air; a fan for enhancing airflow is installed inside the fan duct, and heat dissipation strips are provided on the inner wall of the fan duct.

[0008] The air inlet pipe passes through the side wall of the silo, and the cooling device is connected to the inside of the silo through the air inlet pipe.

[0009] Furthermore, the silo includes: a silo body, a protective cover at the silo body inlet to prevent coal dust from escaping, and a feed inlet on the protective cover for adding coal dust into the silo body.

[0010] Several air inlet pipes pass through the side wall at the bottom of the silo, and the air duct passes through the top of the protective cover.

[0011] Furthermore, the feed inlet is funnel-shaped.

[0012] Furthermore, a valve is installed on the suction branch pipe.

[0013] Furthermore, a first filter screen is installed on the air outlet of the air duct, and a second filter screen is installed on the air inlet of the air inlet pipe.

[0014] Furthermore, the heat dissipation strips are spiral-shaped.

[0015] Furthermore, a temperature sensor is attached to the inner wall of the air duct.

[0016] The advantages of this utility model compared with the prior art are:

[0017] The cooling device dissipates heat from the accumulated pulverized coal, preventing it from overheating. The suction branch pipe promptly outputs the pulverized coal from the silo, reducing its accumulation. With the combined effect of these two devices, the safety hazards caused by the accumulation of pulverized coal in the silo are eliminated, and the stability and safety of the boiler pulverizing system are greatly improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a coal powder accumulation prevention storage device according to this utility model;

[0019] Figure 2 This is a partial cross-sectional view of a coal powder accumulation prevention storage device according to this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the cooling device of a coal powder accumulation prevention storage device according to this utility model.

[0021] In the picture:

[0022] 1. Hopper; 101. Hopper body; 102. Protective cover; 103. Feed inlet;

[0023] 2. Cooling device; 201. Air duct; 2011. First filter; 202. Air inlet pipe; 2021. Second filter; 203. Fan; 204. Heat dissipation strip;

[0024] 3. Suction branch pipe; 301. Valve. Detailed Implementation

[0025] like Figures 1-3 As shown, this embodiment is achieved through the following technical solution: several sets of parallel coal pulverizers and several silos 1 for storing coal powder corresponding to the coal pulverizers. The input end of the coal pulverizer is connected to the discharge port of the corresponding silo 1 through a pipe.

[0026] The silo 1 is equipped with a cooling device 2 for dissipating heat from pulverized coal; a suction branch pipe 3 is connected to the side of the discharge port of the silo 1; the outlet of the suction branch pipe 3 is connected to the input end of the adjacent pulverizer.

[0027] The cooling device 2 includes: a fan duct 201, with a plurality of air inlet pipes 202 evenly arranged on the lower side of the fan duct 201 for introducing air; a fan 203 for enhancing airflow is provided inside the fan duct 201, and heat dissipation guide strips 204 are provided on the inner wall of the fan duct 201.

[0028] The air inlet pipe 202 passes through the side wall of the silo 1, and the cooling device 2 is connected to the inside of the silo 1 through the air inlet pipe 202.

[0029] When the boiler corresponding to a certain silo 1 is shut down, the silo 1 and the corresponding pulverizer are both shut down. At this time, valve 301 is opened, and the pulverized coal in the silo 1 is introduced into the feed port of other operable pulverizers along the suction branch pipe 3. The pulverized coal in the silo 1 is thus dispersed, and the degree of accumulation of pulverized coal in the silo 1 is reduced.

[0030] Specifically, the silo 1 includes: a silo body 101, a protective cover 102 for preventing coal powder from escaping is provided on the inlet of the silo body 101, and a feed inlet 103 for adding coal powder into the silo body 101 is provided on the protective cover 102; specifically, the feed inlet 103 is funnel-shaped.

[0031] Several air inlet pipes 202 pass through the side wall at the bottom of the chamber 101, and the air duct 201 passes through the top of the protective cover 102, such as... Figure 2 As shown.

[0032] Specifically, valve 301 is installed on the suction branch pipe 3.

[0033] Specifically, the air outlet of the air duct 201 is provided with a first filter 2011, and the air inlet of the air inlet pipe 202 is provided with a second filter 2021. The function of the first filter 2011 and the second filter 2021 is to prevent debris from entering the air duct 201 and damaging the fan 203.

[0034] Specifically, the heat dissipation guide strip 204 is spiral-shaped. On the one hand, the heat dissipation guide strip 204 increases the heat dissipation area of ​​the inner wall of the air duct 201, and on the other hand, it is used to guide the airflow.

[0035] Specifically, a temperature sensor is attached to the inner wall of the ventilation duct 201. The temperature sensor helps people measure the temperature inside the hopper 1 so that people can perceive the temperature change of the coal powder inside the hopper in a timely manner.

[0036] The specific operating principle of this device is as follows:

[0037] When the boiler is under maintenance or shut down, the corresponding silo 1 is also closed. At this time, the fan 203 is manually started and the cooling device 2 dissipates heat from the coal powder accumulated in the silo 1 to prevent the coal powder temperature from rising. At the same time, the valve 301 is opened so that the coal powder is introduced into other operating pulverizers through the suction branch pipe 3, thereby reducing the amount of coal powder accumulated in the silo 1. By using the above two methods of cooling and venting, the temperature and amount of coal powder are reduced, avoiding safety hazards caused by coal powder accumulation.

[0038] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A pulverized coal accumulation prevention storage device, comprising: Several sets of parallel coal pulverizers and several coal pulverizer storage bins (1) corresponding to the coal pulverizers. The input end of the coal pulverizer is connected to the discharge port of the corresponding bin (1) through a pipe. The features are as follows: the silo (1) is equipped with a cooling device (2) for heat dissipation of pulverized coal; a suction branch pipe (3) is connected to the side of the discharge port of the silo (1); the outlet of the suction branch pipe (3) is connected to the input end of the adjacent pulverizer. The cooling device (2) includes: a duct (201), a plurality of air inlet pipes (202) for introducing air are evenly provided on the lower side of the duct (201); a fan (203) for enhancing airflow is provided inside the duct (201), and heat dissipation guide strips (204) are provided on the inner wall of the duct (201); The air inlet pipe (202) passes through the side wall of the silo (1), and the cooling device (2) is connected to the inside of the silo (1) through the air inlet pipe (202).

2. The anti-coal powder accumulation storage device according to claim 1, characterized in that, The silo (1) includes: a silo body (101), a protective cover (102) for preventing coal powder from escaping is provided on the inlet of the silo body (101), and a feed inlet (103) for adding coal powder into the silo body (101) is provided on the protective cover (102); Several air inlet pipes (202) pass through the side wall at the bottom of the silo (101), and the air duct (201) passes through the top of the protective cover (102).

3. The anti-coal powder accumulation storage device according to claim 2, characterized in that, The feed inlet (103) is funnel-shaped.

4. The anti-coal powder accumulation storage device according to claim 1, characterized in that, A valve (301) is provided on the suction branch pipe (3).

5. A coal powder anti-accumulation storage device according to claim 1, characterized in that, The air outlet of the air duct (201) is equipped with a first filter screen (2011), and the air inlet of the air inlet pipe (202) is equipped with a second filter screen (2021).

6. A coal powder anti-accumulation storage device according to claim 1, characterized in that, The heat dissipation strip (204) is spiral-shaped.

7. A coal powder anti-accumulation storage device according to claim 1, characterized in that, A temperature sensor is attached to the inner wall of the air duct (201).

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