Automatic emergency fire extinguishing system for cloth bag filter

Abstract

The utility model discloses a cloth bag filter automatic emergency fire extinguishing system, including: filter structure, smoke sensing alarm, spray structure and buffer pool, filter structure includes cloth bag body and outer cylinder, the outer cylinder is sleeved outside cloth bag body, forms with the cloth bag body is connected with the interlayer of induced draft fan, and the spray structure is connected with the buffer pool. The interior of the cloth bag body is connected with a material inlet, and the bottom end of the cloth bag body is provided with a discharge port provided with a first valve and an opening communicated with the interlayer and provided with a second valve; the smoke sensing alarm is provided with a detection end arranged in the cloth bag body; the spraying structure is provided with a spraying end arranged in the cloth bag body; the buffer pool is communicated with a water outlet of the interlayer; according to the device, emergency fire-fighting automation of the cloth bag filter can be realized, and possible fire risks are reduced; and materials sprayed by water after fire fighting are separated from original normal materials, so that greater loss is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of positive electrode material production, in particular to an automatic emergency fire-fighting system for a bag filter. Background Art

[0002] At present, in the production process of lithium iron phosphate positive electrode materials, the spray drying device needs to be used with a bag filter. When the dry lithium iron phosphate material after secondary granulation by the atomizer passes through the bag filter, large particles and fine dust are separated to ensure the cleanliness of the subsequent materials.

[0003] For example, the cloth bag filter for collecting positive electrode material powder provided by publication number CN207871750U includes a slot, a bag and a cage frame; the slot is vertically arranged on the inner surface of the first filter housing, and the top of the slot is flush with the top of the first filter housing; the bag is sleeved on the outside of the cage frame, and the bag is fixed to the inside of the first filter housing by snapping the cage frame into the slot. The positive electrode material powder is brought in by gas, enters the inside of the first filter housing through the feed pipe, and is adsorbed on the bag; the air in the air tank can enter the bag through the air delivery pipe, blow the bag, make the bag expand rapidly, and make the positive electrode material powder adsorbed on the bag fall off, thereby realizing the collection of the positive electrode material powder.

[0004] Since the temperature of the spray drying burner is 230℃, the outlet temperature is controlled not higher than 150℃ by adjusting the frequency of the material pump. However, the commonly used bags are not resistant to high temperatures, are flammable, and are prone to wear and aging. Once the outlet temperature is not properly controlled, the bags will catch fire. Therefore, the bag fire often occurs during the lithium iron phosphate spray drying process. Moreover, when the bag catches fire, the lithium iron phosphate material sprayed with fire water will mix with the original dry material, causing all materials to be scrapped, increasing costs. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and to provide an automatic emergency fire fighting system for bag filters, so as to solve the technical problem in the prior art that after the bag of the bag filter catches fire, the sprayed material is easily mixed with the dry material, thereby increasing the cost.

[0006] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an automatic emergency fire-fighting system of a bag filter, comprising: a filtering structure, a smoke alarm, a spray structure and a buffer pool, wherein the filtering structure comprises a bag body and an outer cylinder, wherein the outer cylinder is sleeved on the outside of the bag body to form an interlayer connected to a draft fan with the bag body, the inside of the bag body is connected to a material inlet, and a discharge port with a first valve installed and an opening communicating with the interlayer and with a second valve installed are provided at the bottom end thereof; the smoke alarm has a detection end arranged inside the bag body; the spray structure has a spray end arranged inside the bag body; and the buffer pool is connected to a water outlet of the interlayer.

[0008] In some embodiments, the discharge port is arranged on the bottom surface of the bag body, and a plurality of the openings are arranged, and a plurality of the openings are located above the discharge port, and a plurality of the openings are evenly arranged on the side wall of the bottom end of the bag body; the bottom surface of the interlayer forms an annular surface surrounding the outside of the discharge port of the bag body, and the water outlet is arranged on the annular surface, and a water outlet pipe is arranged at the water outlet, and the other end of the water outlet pipe extends to the interior of the buffer pool.

[0009] In some embodiments, the water outlet is provided with a bottom plate, and the bottom plate has a sealed state and an open state. When the bottom plate is in the open state, the bottom plate is at least partially separated from the water outlet so that the interlayer is connected to the water outlet pipe; when the bottom plate is in the sealed state, the bottom plate is pressed against the water outlet to seal the water outlet; one end of the bottom plate is hingedly connected to the annular surface at the bottom of the outer tube, and the other end of the bottom plate is connected to the inner wall of the outer tube through a spring and a connecting plate; when the spring is in the initial state, the bottom plate is pressed against the water outlet to form the sealed state; when water flows through the water outlet, the water squeezes the bottom plate to compress the spring, and at this time, the bottom plate is at least partially separated from the water outlet to form the open state; thereby, the bottom plate can be automatically switched between the sealed state and the open state during drainage, so that the fire-fighting water and waste can be discharged into the buffer pool together.

[0010] In some embodiments, the lower part of the bag body is a discharge part, and the cross-sectional area of ​​the discharge part gradually decreases from top to bottom to facilitate discharge and centralized drainage; two smoke alarms are provided and are respectively arranged on both sides of the bag body to improve the detection effect of smoke.

[0011] In some embodiments, the spray structure includes a nozzle, a connecting pipe and a water pump. The nozzle is installed inside the bag body, and the nozzle is connected to the water outlet end of the water pump through a connecting pipe. A plurality of the nozzles are installed on the inner wall of the bag body, and the plurality of nozzles are arranged around the inner wall of the bag body with the central axis of the bag body as a reference.

[0012] In some embodiments, the filtering structure further includes a pulse jet pipe, the jet port of which is connected to the interior of the bag body so as to perform backblowing inside the bag body to separate the material adhered to the bag body.

[0013] In some embodiments, the automatic emergency fire fighting system through a bag filter also includes a dehumidifying and drying feeder and a bag filter. The discharge port of the bag body is connected to a conveying pipe, one end of the conveying pipe is connected to the dehumidifying and drying feeder, and the other end of the conveying pipe is connected to the bag filter, so that the material coming out of the discharge port of the filtering structure can be blown to the bag filter by the dehumidifying and drying feeder, so as to further remove dust by the bag filter.

[0014] Compared with the prior art, the automatic emergency fire-fighting system of the bag filter provided by the utility model can detect the smoke concentration inside the bag body through the filter structure, smoke alarm, sprinkler structure and buffer pool. When the smoke concentration reaches a certain level, it will trigger an alarm, so that the fire hazard can be discovered in time. At the same time, the sprinkler structure can spray water inside the bag body to perform fire extinguishing operations, with high fire extinguishing efficiency and can reduce the possible risk of fire. Moreover, when the bag body catches fire, the opening can be opened and the discharge port can be closed through the first valve and the second valve, so that the water and material mixture after the fire can be discharged to the interlayer through the opened opening, and then discharged to the buffer pool through the interlayer. Therefore, the water and material mixture after the fire can be separated from the dry material in time by using this solution to prevent more dry materials from being scrapped and to avoid greater losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the automatic emergency fire fighting system of the bag filter provided by the embodiment of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the installation of the filter structure of the automatic emergency fire fighting system of the bag filter provided by the embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of the top view of the water outlet and material outlet of the automatic emergency fire-fighting system of the bag filter provided by the embodiment of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the base plate installation of the automatic emergency fire fighting system of the bag filter provided by the embodiment of the utility model.

[0019] Description of reference numerals:

[0020] 1. Filter structure; 11. Bag body; 111. Discharge port; 112. Opening; 12. Outer cylinder; 121. Interlayer; 122. Water outlet; 123. Water outlet pipe; 124. Annular surface; 13. Pulse jet pipe; 14. Bottom plate; 15. Spring; 16. Connecting plate;

[0021] 2. Smoke alarm;

[0022] 3. Spraying structure; 31. Nozzle; 32. Connecting pipe; 33. Water pump;

[0023] 4. Cache pool;

[0024] 5. Dehumidification drying feeder; 51. Conveying pipeline; 6. Bag filter; 7. Spray drying outlet; 8. Induced draft fan. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] In order to solve the technical problem that after the bag of the bag filter catches fire, the sprayed material is easily mixed with the dry material, which increases the cost, the utility model provides an automatic emergency fire fighting system for the bag filter, which can separate the water and material mixture after fire fighting from the dry material in time to prevent more dry materials from being scrapped and avoid greater losses.

[0027] See also Figure 1 and Figure 2 The automatic emergency fire fighting system of the bag filter includes: a filtering structure 1, a smoke alarm 2, a spray structure 3 and a buffer pool 4. The filtering structure 1 includes a bag body 11 and an outer cylinder 12. The outer cylinder 12 is mounted on the outside of the bag body 11, and a sandwich 121 connected to a draft fan 8 is formed between the outer cylinder 12 and the bag body 11. The inside of the bag body 11 is connected to the material inlet, and the bottom end is provided with a discharge port 111 equipped with a first valve and an opening 112 connected to the sandwich 121 and equipped with a second valve; the smoke alarm 2 has a detection end arranged inside the bag body 11; the spray structure 3 has a spray end arranged inside the bag body 11; the buffer pool 4 is connected to the water outlet 122 of the sandwich 121.

[0028] In the present device, the filtering structure 1 includes a bag body 11 and an outer cylinder 12, the outer cylinder 12 is mounted on the outside of the bag body 11, and a sandwich 121 is formed between the outer cylinder 12 and the bag body 11, the sandwich 121 is connected to an induced draft fan 8, and the inside of the bag body 11 is connected to the material inlet, so that the material enters the inside of the bag body 11, and the negative pressure generated by the induced draft fan 8 is used to filter the fine dust in the material; since the smoke alarm 2 has a detection end arranged inside the bag body 11, and the spray structure 3 has a spray end arranged inside the bag body 11, the smoke alarm 2 can detect the smoke concentration inside the bag body 11. When the smoke concentration reaches a certain level, an alarm will be triggered, and fire hazards can be discovered in time. At the same time, the configured spray structure 3 can spray water inside the bag body 11 to perform fire extinguishing operations; since the bottom end of the bag body 11 A discharge port 111 and an opening 112 connected to the interlayer 121 are provided, and a first valve and a second valve are installed on the discharge port 111 and the opening 112 respectively, so that the discharge port 111 and the opening 112 can be controlled to open and close by the first valve and the second valve. When the filtering structure 1 is working normally, the first valve can be opened and the second valve can be closed. At this time, the discharge port 111 is opened and the opening 112 is closed, so that the material can be discharged normally through the discharge port 111; when the bag body 11 catches fire, the second valve can be opened and the first valve can be closed. At this time, the opening 112 is opened and the discharge port 111 is closed, so that the water and material mixture after the fire can be discharged to the interlayer 121 through the opened opening 112, and the buffer pool 4 is connected with the water outlet 122 of the interlayer 121, so that the water and material mixture after the fire can be discharged into the buffer pool 4, which is convenient for the subsequent treatment of waste and sewage.

[0029] It should be noted that the smoke alarm 2 achieves fire prevention by monitoring the concentration of smoke. It uses an ion smoke sensor inside. The ion smoke sensor is a technologically advanced sensor with stable and reliable operation. It is widely used in various fire alarm systems. Its specific working principle can refer to the principle of the existing smoke alarm; in this solution, the model of the smoke alarm 2 is SD119.

[0030] For further information, see Figure 1 The automatic emergency fire fighting system through the bag filter also includes a dehumidifying and drying feeder 5, a bag filter 6 and a spray drying device. The spray drying outlet 7 of the spray drying device is connected to the interior of the bag body 11. The discharge port 111 of the bag body 11 is connected to the side of a conveying pipe 51, so that the material output by the bag body 11 will enter the conveying pipe 51, and one end of the conveying pipe 51 is connected to the dehumidifying and drying feeder 5, and the other end thereof is connected to the bag filter 6. Therefore, the material can be conveyed to the bag filter 6 through the dehumidifying and drying feeder 5 to further filter the dust in the material.

[0031] It should be noted that in this solution, the bag filter 6 can be set to have the same structure as the filter structure 1, and the bag dust collector in the prior art can also be directly used. The dehumidifying and drying feeder 5 integrates the three functions of dehumidification, drying, and two-stage feeding, which is the prior art.

[0032] Due to the negative pressure, a lot of dust will be attached to the bag body 11. In order to prevent the dust from clogging the bag, it is necessary to clean the dust regularly. In some embodiments, please refer to Figure 2 A pulse jet pipe 13 is arranged inside the bag body 11, and the jet port of the pulse jet pipe 13 is connected to the inside of the bag body 11 so as to perform back-blowing inside the bag body 11. Under the pulse jet principle, the compressed air in the bag filter is adjusted through the air storage tank and the control device. When the bag body 11 is blocked, the control device will open the pulse nozzle 31 according to the set time interval and pressure signal to spray high-pressure airflow to the surface of the filter bag. This high-pressure airflow will form a large pneumatic shock wave in an instant, so that the dust on the surface of the bag body 11 is peeled off and impacted, so as to achieve the purpose of separating the material adhering to the bag body 11.

[0033] By arranging the opening 112 and the discharge port 111, discharging and drainage can be achieved respectively. In the present embodiment, the lower part of the bag body 11 is the discharge part, and the discharge part is a conical structure. The cross-sectional area of ​​the discharge part gradually decreases from top to bottom. The discharge port 111 is arranged on the bottom surface of the bag body 11, so that the discharge port 111 is arranged at the bottom of the cone to facilitate the concentrated discharge of materials. At the same time, the conical structure also facilitates the discharge of water and material mixture after fire fighting.

[0034] Among them, the bottom of the outer cylinder 12 extends inward until it is sealed and connected to the bottom of the cloth bag body 11. The bottom of the outer cylinder 12 and the bottom of the cloth bag body 11 are connected in a detachable direction. For example, the cloth bag body 11 is tied to the outer cylinder 12 with a clamp to achieve a sealed connection between the two.

[0035] It should be noted that in this plan, please refer to Figure 2 and Figure 3There is no limit to the number of openings 112 and water outlets 122. In some embodiments, there are a plurality of openings 112, which are of the same size and are located above the discharge port 111 and are installed on the same horizontal plane, so that a plurality of openings 112 are evenly opened on the side wall at the bottom of the bag body 11. The bottom surface of the interlayer 121 forms an annular surface 124 surrounding the outer side of the discharge port 111 of the bag body 11. The annular surface 124 is provided with a plurality of water outlets 122. A water outlet pipe 123 is fixedly installed at the water outlet 122. The other end of the water outlet pipe 123 extends to the interior of the buffer pool 4, so that the mixture of water and materials after fire fighting is discharged to the interlayer 121 through the opening 112. The mixed water is discharged to the interior of the buffer pool 4 through the water outlet pipe 123 and the water outlet 122 in the interlayer 121.

[0036] Preferably, in this embodiment, two of the openings 112 and water outlets 122 are provided. The openings 112 are provided at two sides of the bottom of the bag body 11 , and the water outlets 122 are provided at two opposite sides of the annular surface 124 .

[0037] In order to prevent the water outlet 122 from affecting the negative pressure state inside the filter structure 1, in the present embodiment, the water outlet 122 is provided with a bottom plate 14, and the bottom plate 14 has a sealed state and an open state. When the bottom plate 14 is in the open state, the bottom plate 14 is at least partially separated from the water outlet 122 so that the interlayer 121 is connected to the water outlet pipe 123, so that water flows to the buffer pool 4 through the water outlet 122; when the bottom plate 14 is in the sealed state, the bottom plate 14 abuts against the water outlet 122 to seal the water outlet 122, so that the filter structure 1 can normally separate large particles and fine dust in the material through the negative pressure generated by the induced draft fan 8.

[0038] In one embodiment, see Figure 4 , one end of the bottom plate 14 is hingedly connected to the annular surface 124 at the bottom of the outer tube 12, and a spring 15 is fixedly connected to the bottom of the other end of the bottom plate 14, and the bottom end of the spring 15 is fixedly installed on a connecting plate 16, and the connecting plate 16 is fixedly connected to the inside of the outer tube 12; when the spring 15 is in the initial state, the bottom plate 14 is against the water outlet 122, forming a sealed state of the bottom plate 14; when water flows through the water outlet 122, the bottom plate 14 is squeezed by the water, and the bottom plate 14 rotates downward around its hinged end at this time, so that the spring 15 is compressed, and the bottom plate 14 is spaced from the water outlet 122, so that the water outlet 122 is opened, forming an open state of the bottom plate 14. Therefore, when draining water, the bottom plate 14 can be automatically switched between the sealed state and the open state, so that the fire water and waste can be discharged into the buffer pool 4 together.

[0039] Furthermore, an electric push rod may be provided above the water outlet 122 , the bottom end of the electric push rod contacts the bottom plate 14 , and the electric push rod may be used to push one end of the bottom plate 14 to rotate downward, thereby opening the water outlet 122 .

[0040] It should be noted that, in other embodiments, the installation method of the bottom plate 14 is not limited to this, and other installation methods may be used. For example, a mounting plate is arranged above the water outlet 122, and the bottom plate 14 is arranged below the water outlet 122, and is connected to the mounting plate through a spring, so that when no water flows through, the spring is in an initial state, and the bottom plate 14 is pressed tightly against the bottom of the water outlet 122. When water flows, the mounting plate moves downward to stretch the spring, and at the same time the water outlet 122 is opened to allow water to flow through, thereby realizing automatic switching of the bottom plate 14 between a sealed state and an open state.

[0041] In order to improve the smoke alarm 2's smoke sensitivity, in some embodiments, refer to Figure 2 There are two smoke alarms 2, which are fixedly mounted on the outer tubes 12 on both sides of the bag body 11. The detection end of the smoke alarm 2 passes through one side of the bag body 11 to extend to the interior of the bag body 11. The smoke concentration can be detected on both sides of the bag body 11, and the detection is more accurate.

[0042] It should be noted that the two fire smoke alarms 2 have the function of writing PLC programs. The concentration value for triggering the alarm of the smoke alarm 2 can be set through the control panel, and the sprinkler structure 3 is also connected through the control system. When the smoke alarm 2 sounds an alarm, the sprinkler structure 3 sprays water synchronously to realize the automatic fire extinguishing function, so that the fire is extinguished in time.

[0043] In order to realize the fire extinguishing of the bag body 11 by spraying water, in this embodiment, please refer to Figure 1 and 2 The spray structure 3 includes a nozzle 31, a connecting pipe 32 and a water pump 33. The nozzle 31 is installed inside the bag body 11 and is connected to the water outlet of the water pump 33 through the connecting pipe 32. When implemented, water is transported to the nozzle 31 through the water pump 33 and the connecting pipe 32, so that the water is sprayed onto the inner wall of the bag body 11 through the nozzle 31 to extinguish the fire. It should be noted that the water pump 33 is installed on a water tank or other location with a water source.

[0044] In order to improve the fire extinguishing efficiency, in one embodiment, a plurality of nozzles 31 are installed on the inner wall of the bag body 11, and the plurality of nozzles 31 are arranged around the inner wall of the bag body 11 based on the central axis of the bag body 11. The plurality of nozzles 31 are connected to the water outlet of a water pump 33 through a connecting pipe 32. When implemented, the plurality of nozzles 31 can spray water to the inner wall of the bag body 11 at the same time, thereby expanding the spraying range of the spraying structure 3.

[0045] It should be noted that in this solution, there is no limit on the number of the nozzles 31 , and the number of the nozzles 31 is specifically customized according to the diameter of the bag body 11 . As the diameter of the bag body 11 increases, the number of nozzles 31 installed therein increases sequentially.

[0046] Working principle: When the bag body 11 is on fire, the smoke alarm 2 detects that the concentration of the smoke inside the bag body 11 exceeds the set value. At this time, the smoke alarm 2 sounds, and the spray drying outlet 7, the induced draft fan 8, the first valve of the discharge port 111 and the dehumidification drying feeder 5 are closed. The water pump 33 is turned on to put the nozzle 31 into working state. At the same time, the second valve of the opening 112 is opened, and the bottom plate 14 is automatically opened under the action of the water flow, so that the water and material mixture after the fire is automatically discharged to the buffer pool 4 through the opening 112, the water outlet 122 and the water outlet pipe 123 in turn. After a period of water spraying to extinguish the fire, the smoke alarm 2 no longer sounds, and then the inner wall of the bag body 11 is continuously flushed for about 5 minutes, and then the water pump 33 and the second valve are closed, and the spray drying outlet 7, the induced draft fan 8, the discharge port 111 and the dehumidification drying feeder 5 are opened. Finally, the program ends and returns to the starting point.

[0047] The utility model is provided with a filtering structure 1, a smoke alarm 2, a spray structure 3 and a buffer pool 4. The smoke alarm 2 can detect the smoke concentration inside the bag body 11. When the smoke concentration reaches a certain level, an alarm will be triggered, and the fire hazard can be discovered in time. At the same time, the configured spray structure 3 can spray water inside the bag body 11 to perform a fire extinguishing operation. The fire extinguishing efficiency is high and the possible fire risk can be reduced. Moreover, when the bag body 11 is on fire, the opening 112 can be opened and the discharge port 111 can be closed by means of the first and second valves, so that the water and material mixture after the fire can be discharged to the interlayer 121 through the opened opening 112, and then the water and material mixture after the fire can be discharged to the buffer pool 4 through the interlayer 121. Therefore, the present solution can be used to separate the water and material mixture after the fire from the dry material in time to prevent more dry materials from being scrapped and to avoid greater losses.

[0048] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A bag filter automatic emergency fire fighting system, characterized in that: include: A filter structure, the filter structure comprising a bag body and an outer cylinder, the outer cylinder is sleeved on the outside of the bag body, and a sandwich connected to an induced draft fan is formed between the outer cylinder and the bag body, the inside of the bag body is connected to the material inlet, and the bottom end of the bag body is provided with a discharge port equipped with a first valve and an opening connected to the sandwich and equipped with a second valve; A smoke alarm having a detection end disposed inside the bag body; A spray structure, the spray structure having a spray end disposed inside the bag body; and A buffer pool is connected to the water outlet of the interlayer.

2. The automatic emergency fire fighting system for bag filters according to claim 1 is characterized in that: The discharge port is arranged on the bottom surface of the cloth bag body, and a plurality of the openings are arranged, and a plurality of the openings are located above the discharge port. A plurality of the openings are evenly arranged on the side wall at the bottom end of the cloth bag body.

3. The automatic emergency fire fighting system for bag filters according to claim 1 is characterized in that: The bottom surface of the interlayer forms an annular surface surrounding the outer side of the discharge port of the cloth bag body, the water outlet is arranged on the annular surface, a water outlet pipe is arranged at the water outlet, and the other end of the water outlet pipe extends to the interior of the buffer pool.

4. The automatic emergency fire fighting system for bag filters according to claim 3 is characterized in that: The water outlet is provided with a bottom plate, and the bottom plate has a sealed state and an open state. When the bottom plate is in the open state, the bottom plate is at least partially separated from the water outlet so that the interlayer is connected to the water outlet pipe; when the bottom plate is in the sealed state, the bottom plate is against the water outlet to seal the water outlet.

5. The automatic emergency fire fighting system for bag filters according to claim 4 is characterized in that: One end of the bottom plate is hingedly connected to the annular surface at the bottom of the outer cylinder, and the other end of the bottom plate is connected to the inner wall of the outer cylinder through a spring and a connecting plate; when the spring is in an initial state, the bottom plate is against the water outlet to form the sealed state; when water flows through the water outlet, the water squeezes the bottom plate to compress the spring, and at this time, the bottom plate is at least partially separated from the water outlet to form the open state.

6. The automatic emergency fire fighting system for bag filters according to claim 1, characterized in that: The lower part of the bag body is a discharge part, and the cross-sectional area of ​​the discharge part gradually decreases from top to bottom; two smoke alarms are provided, and are respectively arranged on both sides of the bag body.

7. The automatic emergency fire fighting system for bag filters according to claim 1 is characterized in that: The spray structure comprises a nozzle, a connecting pipe and a water pump. The nozzle is installed inside the bag body, and the nozzle is connected to the water outlet end of the water pump through the connecting pipe.

8. The automatic emergency fire fighting system for bag filters according to claim 7 is characterized in that: The inner wall of the bag body is installed with a plurality of the nozzles. Taking the central axis of the bag body as a reference, the plurality of the nozzles are arranged on the inner wall of the bag body in a circumferential manner.

9. The automatic emergency fire fighting system for bag filters according to claim 1, characterized in that: The filtering structure further comprises a pulse jet pipe, the jet port of which is connected to the interior of the bag body.

10. The automatic emergency fire fighting system for bag filters according to claim 1, characterized in that: The bag filter automatic emergency fire fighting system also includes a dehumidification and drying feeder and a bag filter. The discharge port of the bag body is connected to a conveying pipe, one end of the conveying pipe is connected to the dehumidification and drying feeder, and the other end of the conveying pipe is connected to the bag filter.

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