Bag collector with explosion-proof effect for coal milling system

Abstract

The utility model discloses an explosion-proof cloth bag dust collector for a coal mill system, which relates to the technical field of cloth bag dust collectors, and comprises a bottom plate, a box body is arranged on the outer wall of the top of the bottom plate, a partition plate is welded on the inner wall of the box body, a mounting hole is formed in the center of the partition plate, a connecting groove is formed in the inner wall of the mounting hole, and the connecting groove is communicated with the box body. The outer wall of the connecting groove is rotationally connected with a dust removal bag through threads, and a supporting frame is arranged on the inner wall of the connecting groove. According to the dust removal device, the dust removal bag purifies air, when the pressure in the box body is too large or the temperature is too high, unfiltered air in the box body is guided into the pressure relief box through the pressure relief pipe, and the air pressure and the temperature in the box body are gradually reduced along with the fact that high-temperature air in the box body is guided out; the dust collector is prevented from exploding by reducing the temperature and air pressure in the box body, compared with a traditional dust collector, the air pressure and temperature in the dust collector are reduced by exhausting air in time, and dust explosion caused by too high air pressure in the dust collector is prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of baghouse dust collectors, and in particular to a baghouse dust collector with explosion-proof effect for coal mill systems. Background Technology

[0002] A baghouse dust collector, also known as a bag filter, is a dry dust filtration device. It is suitable for collecting fine, dry, non-fibrous dust. The filter bags are made of woven filter cloth or non-woven felt, utilizing the filtration effect of the fibrous fabric to filter dust-laden gas. When the dust-laden gas enters the baghouse dust collector, larger, heavier dust particles settle due to gravity and fall into the ash hopper. Gas containing finer dust particles is purified by trapping the dust as it passes through the filter media. Baghouse dust collectors are widely used in flue gas treatment, especially in coal mill systems. The grinding of raw coal generates air containing a large amount of dust. If this dust is emitted directly without treatment, it will cause environmental pollution. Therefore, baghouse dust collectors are commonly used in coal mill systems to treat the dust-containing air.

[0003] However, existing baghouse dust collectors used in coal mill systems have certain shortcomings:

[0004] First, existing baghouse dust collectors do not have explosion-proof functions. When the dust pressure inside the dust collector is too high and the temperature is too high, dust explosions are very likely to occur, posing a certain danger.

[0005] Secondly, as the usage time of existing baghouse dust collectors increases, the dust and impurities adhering to the outer wall of the collection bags gradually increase, causing the outer wall of the bags to become gradually blocked, preventing normal air circulation. If cleaning is not carried out in time, it will lead to excessive internal pressure in the dust collector and even cause an explosion.

[0006] Therefore, a baghouse dust collector with explosion-proof properties for coal mill systems is proposed to solve the above problems. Utility Model Content

[0007] The purpose of this application is to provide a baghouse dust collector with explosion-proof properties for coal mill systems, in order to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this application provides the following technical solution: a baghouse dust collector with explosion-proof properties for a coal mill system, comprising a base plate, a housing provided on the top outer wall of the base plate, a partition welded to the inner wall of the housing, a mounting hole provided at the center of the partition, a connecting groove provided on the inner wall of the mounting hole, a dust collection bag rotatably connected to the outer wall of the connecting groove via threads, a support frame provided on the inner wall of the connecting groove, the support frame being adapted to the dust collection bag, and a cleaning component provided on the inner wall of the housing, the cleaning component being adapted to the dust collection bag. An explosion-proof component is installed on one side of the enclosure. The explosion-proof component is adapted to the enclosure and includes a pressure relief box welded to the top outer wall of the base plate. The pressure relief box contains a concentrated sodium hydroxide solution. A pressure relief pipe is installed in the middle of the outer wall of one side of the enclosure, leading into the pressure relief box. The two ends of the pressure relief pipe are located below the partition and below the sodium hydroxide liquid level, respectively. An exhaust pipe is installed at one end of the top outer wall of the pressure relief box, located above the liquid surface. A matching air pump and a one-way vent valve are installed on the outer wall of the pressure relief pipe.

[0009] Preferably, a temperature sensor and a pressure sensor are respectively installed on the inner walls of both sides of the enclosure, and a control panel is installed on the outer wall of the enclosure. The control panel is connected to the temperature sensor and the pressure sensor respectively via wires.

[0010] Preferably, both the temperature sensor and the pressure sensor are connected to a PLC controller via wires, and the PLC controller is connected to the air pump via wires.

[0011] Preferably, the cleaning component includes a rotating groove formed on the outer wall of the partition, a rotating ring rotatably mounted on the inner wall of the rotating groove, a cleaning brush disposed at the bottom of the rotating ring, and cleaning bristles evenly distributed on the inner wall of the cleaning brush, the cleaning brush being adapted to the dust bag.

[0012] Preferably, a control frame is welded to the top outer wall of the rotating ring, the control frame is rotatably connected to the top inner wall of the housing, and a servo motor is installed on the top outer wall of the housing by bolts, the output shaft of the servo motor is connected to the control frame.

[0013] Preferably, the bottom outer wall of the box is provided with a ash discharge trough, the ash discharge trough has a square structure, the inner wall of the ash discharge trough is slidably inserted with a matching sealing plate, and ash collection blocks are provided around the bottom inner wall of the box, the ash collection blocks being matched with the ash discharge trough.

[0014] Preferably, the bottom and top of the outer wall of the box away from the pressure relief box are respectively provided with an air inlet pipe and an air outlet pipe. The air inlet pipe and the air outlet pipe are adapted to the box. The air inlet pipe is provided with a one-way air inlet valve, and the air outlet pipe is provided with a one-way air outlet valve. The outer wall of the box is provided with an observation window, which is adapted to the dust bag and cleaning components.

[0015] Preferably, the outer wall of the pressure relief tank is provided with a liquid level window adapted to it, the top outer wall of the pressure relief tank is provided with a filling pipe, and the bottom of the outer wall of the pressure relief tank away from the tank body is provided with a drain pipe, and the drain pipe is provided with a control valve.

[0016] In summary, the technical effects and advantages of this utility model are as follows:

[0017] 1. In this utility model, during operation, dust-laden air enters the chamber through the inlet pipe. The dust collection bag filters and purifies the dust-laden air. Supported by the support frame, the dust collection bag remains inflated and will not be crushed by pressure, ensuring proper air filtration. When the internal pressure or temperature of the chamber is too high, the pressure relief pipe introduces unfiltered air into the pressure relief chamber. As the high-temperature air is expelled, the internal pressure and temperature gradually decrease. This reduces the internal temperature and pressure, preventing the dust collector from exploding. The gas introduced into the pressure relief chamber is cleaned with a concentrated sodium hydroxide solution, which lowers the air temperature and washes the gas with water, removing harmful substances and dust. Compared to traditional dust collectors, this design reduces internal pressure and temperature through timely exhaust, preventing dust explosions caused by excessive internal pressure, making it safer to use.

[0018] 2. In this utility model, the temperature sensor and the pressure sensor monitor the temperature and pressure inside the chamber in real time, respectively. The control panel sets the alarm data of the temperature sensor and the pressure sensor as needed. When the temperature sensor detects the alarm temperature or the pressure sensor detects the alarm pressure, the air pump of the pressure relief pipe is turned on to draw out the gas inside the chamber, thereby realizing the depressurization and cooling of the chamber.

[0019] 3. In this utility model, the servo motor drives the control frame to rotate, causing the rotating ring and cleaning brush to rotate. The cleaning bristles on the inner wall of the cleaning brush clean the outer wall of the dust bag during the rotation, removing the dust from the outer wall. The dust falls to the bottom of the box under the action of gravity and collects. The cleaning component cleans the dust bag, preventing excessive dust from adhering to the outer wall of the dust bag, which could cause the dust bag to become clogged and cause the air pressure inside the box to rise rapidly, leading to a dust explosion. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the main body's external structure in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the box in the embodiment of this application;

[0023] Figure 3 This is a schematic diagram of the dust bag structure in an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of the cleaning component structure in an embodiment of this application.

[0025] In the diagram: 1. Base plate; 2. Box body; 3. Partition plate; 4. Connecting groove; 5. Dust bag; 6. Pressure relief box; 7. Pressure relief pipe; 8. Exhaust pipe; 9. Air pump; 10. Temperature sensor; 11. Pressure sensor; 12. Control panel; 13. Rotating ring; 14. Cleaning brush; 15. Control frame; 16. Servo motor; 17. Support frame; 18. Ash discharge trough; 19. Sealing plate; 20. Ash collection block; 21. Observation window; 22. Liquid level window. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example: Reference Figure 1-4The diagram shows an explosion-proof baghouse dust collector for a coal mill system. It includes a base plate 1, a housing 2 mounted on the top outer wall of the base plate 1, a partition 3 welded to the inner wall of the housing 2, a mounting hole at the center of the partition 3, a connecting groove 4 on the inner wall of the mounting hole, a dust collection bag 5 threadedly connected to the outer wall of the connecting groove 4, a support frame 17 fitted to the dust collection bag 5, a cleaning component fitted to the dust collection bag 5 on the inner wall of the housing 2, and an explosion-proof component fitted to the housing 2 on one side. The explosion-proof component includes a pressure relief box 6 welded to the top outer wall of the base plate 1, containing a concentrated sodium hydroxide solution. A pressure relief pipe 7, leading into the pressure relief box 6, is located in the middle of the outer wall of one side of the housing 2. The pressure pipe 7 has two ends located below the partition plate 3 and below the sodium hydroxide liquid level, respectively. One end of the top outer wall of the pressure relief tank 6 is equipped with an exhaust pipe 8, which is located above the liquid level. The outer wall of the pressure relief pipe 7 is equipped with a matching air pump 9 and a one-way exhaust valve. The bottom and top of the outer wall of the tank body 2 away from the pressure relief tank 6 are respectively equipped with an air inlet pipe and an air outlet pipe, which are both matched with the tank body 2. The air inlet pipe is equipped with a one-way air inlet valve, and the air outlet pipe is equipped with a one-way air outlet valve. The outer wall of the tank body 2 is equipped with an observation window 21, which is matched with the dust bag 5 and the cleaning component. The outer wall of the pressure relief tank 6 is equipped with a matching liquid level window 22. The top outer wall of the pressure relief tank 6 is equipped with a filling pipe. The bottom of the outer wall of the pressure relief tank 6 away from the tank body 2 is equipped with a drain pipe, which is equipped with a control valve.

[0028] With the above structure: During operation, dust-laden air enters the housing 2 through the inlet pipe. The dust bag 5 filters and purifies the dust-laden air. The dust bag 5 remains inflated under the support of the support frame 17, preventing it from being crushed by pressure and ensuring normal air filtration. When the pressure or temperature inside the housing 2 is too high, the pressure relief pipe 7 introduces the unfiltered air from the housing 2 into the pressure relief box 6. As the high-temperature air in the housing 2 is discharged, the air pressure and temperature inside the housing 2 gradually decrease. By reducing the temperature and air pressure inside the housing 2, the dust collector is prevented from exploding. The gas introduced into the pressure relief box 6 is cleaned with a concentrated sodium hydroxide solution, which lowers the air temperature and washes the gas with water, removing harmful substances and dust from the gas. Compared with traditional dust collectors, timely exhaust reduces the air pressure and temperature inside the dust collector, preventing dust explosions caused by excessively high internal air pressure, making it safer to use.

[0029] like Figure 2As shown, temperature sensors 10 and pressure sensors 11 are installed on the inner walls of both sides of the chamber 2, respectively. A control panel 12 is installed on the outer wall of the chamber 2. The control panel 12 is connected to the temperature sensors 10 and pressure sensors 11 through wires. Both temperature sensors 10 and pressure sensors 11 are connected to PLC controllers through wires. Both PLC controllers are connected to the vacuum pump 9 through wires. Temperature sensors 10 and pressure sensors 11 monitor the temperature and pressure inside the chamber 2 in real time. The control panel 12 can set the alarm data of temperature sensors 10 and pressure sensors 11 as needed. When temperature sensor 10 detects the alarm temperature or pressure sensor 11 detects the alarm pressure, the vacuum pump 9 of the pressure relief pipe 7 is turned on to draw out the gas inside the chamber 2, thereby realizing the depressurization and cooling of the chamber 2.

[0030] like Figure 4 As shown, the cleaning assembly includes a rotating groove formed on the outer wall of the partition 3. A rotating ring 13 is rotatably mounted on the inner wall of the rotating groove. A cleaning brush 14 is provided at the bottom of the rotating ring 13. The inner wall of the cleaning brush 14 is provided with cleaning bristles distributed at equal intervals. The cleaning brush 14 is adapted to the dust bag 5. A control frame 15 is welded to the top outer wall of the rotating ring 13. The control frame 15 is rotatably connected to the top inner wall of the housing 2. A servo motor 16 is bolted to the top outer wall of the housing 2. The output shaft of the servo motor 16 is connected to the control frame 15. As the air pressure inside the housing 2 continuously rises... This indicates that the dust removal effect of the dust bag 5 has deteriorated, meaning that the dust bag 5 is clogged. At this time, the servo motor 16 drives the control frame 15 to rotate, which in turn drives the rotating ring 13 and the cleaning brush 14 to rotate. The cleaning bristles on the inner wall of the cleaning brush 14 clean the outer wall of the dust bag 5 during the rotation, removing the dust from its outer wall. The dust falls to the bottom of the box 2 under the action of gravity and collects. The cleaning component cleans the dust bag 5 to prevent the dust bag 5 from being clogged due to excessive dust adhering to its outer wall, which could cause the air pressure inside the box 2 to rise rapidly and lead to a dust explosion.

[0031] like Figure 2 As shown, a dust discharge trough 18 is provided on the bottom outer wall of the box 2. The dust discharge trough 18 has a square structure. A sealing plate 19 that is compatible with it is slidably inserted into the inner wall of the dust discharge trough 18. Dust collection blocks 20 are provided around the bottom inner wall of the box 2. The dust collection blocks 20 are compatible with the dust discharge trough 18. After the gas treatment is completed, the blocked dust falls into the dust discharge trough 18 for collection. At this time, the sealing plate 19 can be pulled out to clean the dust.

[0032] The working principle of this practical application is as follows:

[0033] During operation, dust-laden air enters the housing 2 through the inlet pipe. The dust bag 5 filters and purifies the dust-laden air. The dust bag 5 remains inflated under the support of the support frame 17, preventing it from being crushed by pressure and ensuring normal air filtration. When the pressure or temperature inside the housing 2 is too high, the pressure relief pipe 7 introduces the unfiltered air from the housing 2 into the pressure relief box 6. As the high-temperature air in the housing 2 is discharged, the air pressure and temperature inside the housing 2 gradually decrease. By reducing the temperature and air pressure inside the housing 2, the dust collector is prevented from exploding. The gas introduced into the pressure relief box 6 is cleaned with a concentrated sodium hydroxide solution, which lowers the air temperature and washes the gas with water, removing harmful substances and dust from the gas. Compared with traditional dust collectors, timely exhaust reduces the air pressure and temperature inside the dust collector, preventing dust explosions caused by excessively high internal air pressure, making it safer to use.

[0034] Temperature sensor 10 and pressure sensor 11 monitor the temperature and pressure inside the chamber 2 in real time. Control panel 12 sets the alarm data of temperature sensor 10 and pressure sensor 11 as needed. When temperature sensor 10 detects the alarm temperature or pressure sensor 11 detects the alarm pressure, the air pump 9 of pressure relief pipe 7 is turned on to draw out the gas inside the chamber 2, thereby realizing pressure relief and cooling of chamber 2.

[0035] The continuous rise in air pressure inside the housing 2 indicates that the dust removal effect of the dust bag 5 is deteriorating, meaning that the dust bag 5 is clogged. At this time, the servo motor 16 drives the control frame 15 to rotate, which in turn drives the rotating ring 13 and the cleaning brush 14 to rotate. The cleaning bristles on the inner wall of the cleaning brush 14 clean the outer wall of the dust bag 5 during the rotation, removing the dust from its outer wall. The dust falls to the bottom of the housing 2 under the action of gravity and collects. The cleaning component cleans the dust bag 5, preventing the dust bag 5 from being clogged due to excessive dust adhering to its outer wall, which could cause the air pressure inside the housing 2 to rise rapidly and lead to a dust explosion.

[0036] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bag filter with explosion-proof effect for coal grinding system, comprising a bottom plate (1), characterized in that: The outer wall of the top of the bottom plate (1) is provided with a box body (2), the inner wall of the box body (2) is welded with a partition plate (3), the center position of the partition plate (3) is provided with a mounting hole, the inner wall of the mounting hole is provided with a connecting groove (4), the outer wall of the connecting groove (4) is rotatably connected with a dust removal bag (5) through threads, the inner wall of the connecting groove (4) is provided with a supporting frame (17), the supporting frame (17) is matched with the dust removal bag (5), the inner wall of the box body (2) is provided with a cleaning assembly, the cleaning assembly is matched with the dust removal bag (5), one side of the box body (2) is provided with an explosion-proof assembly, the explosion-proof assembly is matched with the box body (2), the explosion-proof assembly comprises a pressure relief tank (6) welded to the outer wall of the top of the bottom plate (1), the pressure relief tank (6) contains sodium hydroxide concentrated solution, the outer wall of one side of the box body (2) is provided with a pressure relief pipe (7) penetrating into the inside of the pressure relief tank (6), the pressure relief pipe (7) is located below the partition plate (3) and below the sodium hydroxide liquid level respectively, one end of the outer wall of the top of the pressure relief tank (6) is provided with an exhaust pipe (8), the exhaust pipe (8) is located above the liquid level, the outer wall of the pressure relief pipe (7) is provided with a suction pump (9) and a one-way air outlet valve matched therewith.

2. A bag filter with explosion-proof effect for a coal grinding system according to claim 1, characterized in that: The inner walls on both sides of the box body (2) are respectively provided with temperature sensors (10) and pressure sensors (11), and the outer wall of the box body (2) is provided with a control panel (12), which is connected with the temperature sensors (10) and the pressure sensors (11) through wires.

3. A bag filter with explosion-proof effect for a coal grinding system according to claim 2, characterized in that: The temperature sensors (10) and the pressure sensors (11) are both connected with PLC controllers through wires, and the PLC controllers are connected with the suction pump (9) through wires.

4. The bag filter with explosion-proof effect for a coal grinding system according to claim 1, characterized in that: The cleaning assembly comprises a rotating groove formed in the outer wall of the partition plate (3), the inner wall of the rotating groove is rotatably provided with a rotating ring (13), the bottom of the rotating ring (13) is provided with a cleaning brush (14), the inner wall of the cleaning brush (14) is provided with cleaning hairs distributed at equal distances, and the cleaning brush (14) is matched with the dust removal bag (5).

5. A bag filter with explosion-proof effect for a coal grinding system according to claim 4, characterized in that: The top outer wall of the rotating ring (13) is welded with a control frame (15), the control frame (15) is rotatably connected with the top inner wall of the box body (2), and the outer wall of the top of the box body (2) is provided with a servo motor (16) connected through bolts, and the output shaft of the servo motor (16) is connected with the control frame (15).

6. A bag filter with explosion-proof effect for a coal grinding system according to claim 1, characterized in that: The outer wall of the bottom of the box body (2) is provided with an ash discharge groove (18), the ash discharge groove (18) is of a square structure, the inner wall of the ash discharge groove (18) is slidably inserted with a sealing plate (19) matched therewith, and the inner wall of the bottom of the box body (2) is provided with ash collecting blocks (20) around.

7. A bag filter with explosion-proof effect for a coal grinding system according to claim 1, characterized in that: The box (2) is provided with an air inlet pipe and an air outlet pipe at the bottom and top of the outer wall of the side away from the pressure relief tank (6), the air inlet pipe and the air outlet pipe are matched with the box (2), the air inlet pipe is provided with a one-way air inlet valve, the air outlet pipe is provided with a one-way air outlet valve, the outer wall of the box (2) is provided with an observation window (21), and the observation window (21) is matched with the dust removal bag (5) and the cleaning assembly.

8. A bag filter with explosion-proof effect for a coal grinding system according to claim 1, characterized in that: The outer wall of the pressure relief tank (6) is provided with a liquid level window (22) matched therewith, the top outer wall of the pressure relief tank (6) is provided with a filling pipe, and the bottom outer wall of the side of the pressure relief tank (6) away from the box (2) is provided with a drain pipe, and the drain pipe is provided with a control valve.

Images