High-temperature filter bag pulse blowing device

Abstract

The utility model belongs to the field of pulse jet device, specifically is a high temperature filter bag pulse jet device, including cloth bag type dust collector, one side of cloth bag type dust collector is fixed with gas pocket, one side of gas pocket and compressed gas flow supply equipment intercommunication, the top of cloth bag type dust collector is equipped with the waste hole that arranges, the inner wall of cloth bag type dust collector is fixed with the flower board, install a plurality of cloth bags in the flower board, the inside of cloth bag is equipped with the framework, the top of gas pocket is connected with a plurality of pulse pipe, through the cooperation of sheath and heating wire, can heat the compressed gas flow flowing in pulse pipe, reduce the temperature difference of compressed gas flow and flue gas, and then avoid the water vapor condensed in cloth bag, reduce the situation that the clearance in cloth bag appears to block, prolong the service life of cloth bag.

Description

Technical Field

[0001] This utility model relates to the field of pulse jet blowing devices, specifically a high-temperature filter bag pulse jet blowing device. Background Technology

[0002] As the core equipment for industrial flue gas purification, baghouse dust collectors capture dust through the fiber filtration of filter bags. The dust deposited on the filter media can be removed from the surface of the filter media and fall into the ash hopper under the action of pulse jet cleaning.

[0003] In existing technologies, baghouse dust collectors are generally used to treat and remove dust from high-temperature flue gas, while pulse jets are generally at room temperature. During use and observation, it has been found that when high-temperature flue gas is mixed with room-temperature pulse jets, the flue gas temperature drops rapidly below the dew point, causing water vapor to condense into liquid water. The water condenses on the surface of the filter bag to form a water film, which in turn increases the adhesion of the filter bag surface, making it difficult to remove dust.

[0004] Therefore, a high-temperature filter bag pulse jet blowing device is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A high-temperature filter bag pulse jet cleaning device of this utility model includes a baghouse dust collector, with an air tank fixedly connected to one side of the baghouse dust collector; one side of the air tank is connected to a compressed air supply device; a waste discharge hole is opened at the top of the baghouse dust collector; a tube sheet is fixedly connected to the inner wall of the baghouse dust collector; multiple filter bags are installed inside the tube sheet; a frame is provided inside the filter bags; multiple pulse tubes are connected to the top of the air tank; the pulse tubes and the baghouse dust collector... The dust collector is designed to penetrate through the filter bag and extend into the inner wall of the filter bag. Multiple air jet holes are located at the bottom of the pulse tube inside the filter bag, and these holes correspond to the filter bags. A sheath is fixedly attached to the middle of the pulse tube. A heating wire is fixedly attached to the inner wall of the sheath. Through the combined action of the sheath and the heating wire, the compressed airflow flowing inside the pulse tube can be heated, reducing the temperature difference between the compressed airflow and the flue gas. This prevents water vapor condensation inside the filter bags, reduces the likelihood of blockage in the filter bag's pores, and extends the service life of the filter bags.

[0007] Preferably, a jacket is fixed to the outer wall of the gas bag; the jacket and the pulse tube are connected through each other; the jacket and the exhaust hole are connected by a pipe, and exhaust holes are opened on both sides of the jacket; by setting the jacket, the high-temperature exhaust gas discharged from the exhaust hole can preheat the compressed air flow in the gas bag, which helps to reduce condensation in the filter bag and also realizes the recovery and utilization of residual heat energy of flue gas by the device.

[0008] Preferably, a first baffle and a second baffle are fixedly connected to both sides of the inner wall of the jacket; the first baffle and the second baffle are staggered; by setting the first baffle and the second baffle, when the high-temperature exhaust gas flows in the jacket, the flow path will be increased due to the obstruction effect of the first baffle and the second baffle, thereby increasing the time for the high-temperature exhaust gas to heat the compressed airflow in the bag filter, and further improving the utilization rate of the waste heat in the high-temperature exhaust gas.

[0009] Preferably, the frame includes a cover plate, multiple connecting rods, and multiple connecting rings; the multiple connecting rods and the frame are fixedly connected; the connecting rings and the multiple connecting rods are also fixedly connected; a protective pad is fixedly attached to the outer wall of the connecting ring; the protective pad is located between the connecting ring and the bag; the frame provides internal support for the bag. When the pulsed airflow blows onto the bag, the bag expands and sways. The protective pad will contact the inner wall of the bag when the bag sways. Since the surface of the protective pad is made of a smooth material, it can reduce the friction and wear when the bag and the protective pad come into contact, and can also reduce the direct contact between the bag and the frame, thus extending the service life of the bag.

[0010] Preferably, the outer wall of the cover plate is provided with multiple limiting grooves; multiple fixing blocks are fixedly connected to the inner wall of the tube sheet; the limiting grooves and fixing blocks are correspondingly arranged; by setting the limiting grooves and fixing blocks, when the frame is installed into the bag, the limiting grooves can be aligned with the fixing blocks first, and then the frame can be installed on the surface of the tube sheet and inside the bag, so that the frame will not be deflected by the airflow, thereby reducing the friction between it and the bag.

[0011] Preferably, a third baffle is fixedly connected between adjacent connecting rods; the third baffle and the connecting ring are correspondingly arranged and have a frustum structure; by setting the third baffle, the pulsed airflow will come into contact with the third baffle after entering the bag, and the third baffle will obstruct the airflow to reduce its flow rate, so as to avoid damage to the surface of the bag due to excessive compressed airflow. At the same time, because the third baffle has a frustum structure, it can expand the airflow, which facilitates the airflow to blow onto the inner wall of the bag.

[0012] The advantages of this utility model are:

[0013] 1. The high-temperature filter bag pulse jet blowing device of this utility model can heat the compressed airflow flowing in the pulse tube through the cooperation of the sheath and the heating wire, reduce the temperature difference between the compressed airflow and the flue gas, thereby avoiding water vapor condensation in the filter bag, reducing the blockage of the gaps in the filter bag, and extending the service life of the filter bag.

[0014] 2. The high-temperature filter bag pulse jet blowing device of this utility model, by setting a jacket, allows the high-temperature exhaust gas discharged from the exhaust hole to preheat the compressed airflow in the air tank, which helps to reduce condensation inside the filter bag and also realizes the recovery and utilization of residual heat energy of flue gas. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the main body of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the decorative panel in this utility model;

[0018] Figure 3 This is a schematic diagram of the pulse tube structure in this utility model;

[0019] Figure 4 This is a schematic diagram of the skeleton structure in this utility model;

[0020] Figure 5 This is a schematic diagram of the connecting ring in this utility model.

[0021] In the diagram: 1. Baghouse dust collector; 12. Waste discharge hole; 13. Tube sheet; 14. Filter bag; 15. Frame; 16. Air manifold; 17. Pulse jet tube; 18. Sheath; 19. Heating wire; 2. Jacket; 3. First baffle; 32. Second baffle; 4. Cover plate; 42. Connecting rod; 43. Connecting ring; 44. Protective pad; 5. Limiting groove; 52. Fixing block; 6. Third baffle. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 scope of protection of the present utility model.

[0023] Specific implementation examples are given below.

[0024] Please see Figures 1 to 5As shown in the figure, a high-temperature filter bag pulse jet cleaning device according to an embodiment of the present invention includes a bag filter 1, an air tank 16 fixedly connected to one side of the bag filter 1; one side of the air tank 16 is connected to a compressed air supply device; a waste discharge hole 12 is opened at the top of the bag filter 1; a tube sheet 13 is fixedly connected to the inner wall of the bag filter 1; a plurality of filter bags 14 are installed in the tube sheet 13; a frame 15 is provided inside the filter bags 14; and a plurality of pulse tubes 17 are connected to the top of the air tank 16. The pulse jet pipe 17 and the bag filter 1 are connected through each other and extend to the inner wall of the bag filter 1. Multiple air jet holes are opened at the bottom of the pulse jet pipe 17 inside the bag filter 1, and the air jet holes and the filter bags 14 are correspondingly arranged. A sheath 18 is fixedly connected to the middle of the pulse jet pipe 17. A heating wire 19 is fixedly connected to the inner wall of the sheath 18. When pulse jet cleaning is performed on the filter bags 14, compressed air can be injected into the air tank 16 through a compressed air supply device, and the pulse valve on the pulse jet pipe 17 can be opened to allow the pulse jet to be applied. Compressed airflow can be injected into the bag 14 through the jet hole at the bottom of the pulse tube 17, causing the bag 14 to expand rapidly and shake off the dust on its surface. The above-mentioned injection process can be repeated intermittently by the control module to perform pulse injection on the bag 14. The above pulse injection on the bag 14 is a mature existing technology, so its principle will not be described in detail. After the pulse valve is opened, the airflow will enter the pulse tube 17. At this time, the heating wire 19 can be energized to generate heat to heat the compressed airflow flowing in the pulse tube 17. The outer wall of the heating wire 19 can be provided with heat insulation material to reduce the leakage of the heat generated by the heating wire 19. The heated compressed airflow can reduce the temperature difference between it and the flue gas, thereby reducing the condensation phenomenon in the bag 14. Through the cooperation of the sheath 18 and the heating wire 19, the compressed airflow flowing in the pulse tube 17 can be heated, reducing the temperature difference between the compressed airflow and the flue gas, thereby avoiding the condensation of water vapor in the bag 14, reducing the blockage of the gaps in the bag 14, and extending the service life of the bag 14.

[0025] Please see Figures 1 to 3As shown, a jacket 2 is fixed to the outer wall of the air tank 16; the jacket 2 and the pulse tube 17 are connected through each other; the jacket 2 and the exhaust hole 12 are connected by a pipe, and exhaust holes are opened on both sides of the jacket 2; after the high-temperature flue gas is drawn into the bag filter 1 under negative pressure, it will be cleaned by the filter bag 14, and the cleaned exhaust gas will be discharged through the exhaust hole 12. At this time, the high-temperature exhaust gas will enter the interior of the jacket 2 through the pipe and flow in the jacket 2 until it is discharged along both sides of the jacket 2. The high-temperature exhaust gas in the jacket 2 will heat the compressed air flow in the bag filter 1 through heat conduction, so as to preheat the compressed air flow and further reduce the temperature difference between the high-temperature exhaust gas and the compressed air flow; by setting the jacket 2, the high-temperature exhaust gas discharged from the exhaust hole 12 can preheat the compressed air flow in the air tank 16, which helps to reduce condensation in the filter bag 14 and also realizes the recovery and utilization of the residual heat energy of the flue gas.

[0026] Please see Figure 3 As shown, a first baffle 3 and a second baffle 32 are fixedly connected to both sides of the inner wall of the jacket 2, respectively; the first baffle 3 and the second baffle 32 are staggered; by setting the first baffle 3 and the second baffle 32, when the high-temperature exhaust gas flows in the jacket 2, the flow path will be increased due to the obstruction of the first baffle 3 and the second baffle 32, thereby increasing the time for the high-temperature exhaust gas to heat the compressed airflow in the bag filter 1, and further improving the utilization rate of the waste heat in the high-temperature exhaust gas.

[0027] Please see Figure 4 and Figure 5 As shown, the frame 15 includes a cover plate 4, multiple connecting rods 42, and multiple connecting rings 43; the multiple connecting rods 42 and the frame 15 are fixedly connected; the connecting rings 43 and the multiple connecting rods 42 are also fixedly connected; a protective pad 44 is fixedly connected to the outer wall of the connecting ring 43; the protective pad 44 is located between the connecting ring 43 and the bag 14; the frame 15 provides internal support for the bag 14. When the pulsed airflow blows the bag 14, the bag 14 will expand and sway. The protective pad 44 will contact the inner wall of the bag 14 when the bag 14 sways. Since the surface of the protective pad 44 is made of a smooth material, it can reduce the friction and wear when the bag 14 and the protective pad 44 come into contact, and also reduce the direct contact between the bag 14 and the frame 15, thus extending the service life of the bag 14.

[0028] Please see Figure 4 and Figure 5As shown, the outer wall of the cover plate 4 is provided with multiple limiting grooves 5; the inner wall of the flower plate 13 is fixed with multiple fixing blocks 52; the limiting grooves 5 and the fixing blocks 52 are correspondingly arranged; by setting the limiting grooves 5 and the fixing blocks 52, when the frame 15 is installed into the bag 14, the limiting grooves 5 can be aligned with the fixing blocks 52 first, and then the frame 15 can be installed onto the surface of the flower plate 13 and placed inside the bag 14, so that the frame 15 will not be deflected by the airflow, thereby reducing the friction between it and the bag 14.

[0029] Please see Figure 5 As shown, a third baffle 6 is fixedly connected between adjacent connecting rods 42; the third baffle 6 and the connecting ring 43 are correspondingly arranged and have a frustum structure; by setting the third baffle 6, the pulsed airflow will come into contact with the third baffle 6 after entering the bag 14. The third baffle 6 will obstruct the airflow to reduce its flow rate and avoid damage to the surface of the bag 14 due to excessive compressed airflow. At the same time, because the third baffle 6 has a frustum structure, it can expand the airflow, which facilitates the airflow to blow onto the inner wall of the bag 14.

[0030] Working principle: When pulse-jet blowing is performed on the filter bag 14, compressed air is injected into the air tank 16 through the compressed air supply device. By opening the pulse valve on the pulse tube 17, the compressed air is blown into the filter bag 14 through the jet hole at the bottom of the pulse tube 17, causing the filter bag 14 to expand rapidly and shake off the dust on its surface. The above-mentioned blowing process can be repeated intermittently by the control module to pulse-jet blow the filter bag 14. The above-mentioned pulse-jet blowing of the filter bag 14 is a mature existing technology, so its principle will not be described in detail. After the pulse valve is opened, the airflow will enter the pulse tube 17. At this time, the heating wire 19 can be energized to generate heat, thereby heating the compressed airflow flowing in the pulse tube 17. The outer wall of the heating wire 19 can be provided with heat insulation material to reduce the leakage of heat generated by the heating wire 19. The heated compressed airflow can reduce the temperature difference between it and the flue gas, thereby reducing the condensation phenomenon inside the filter bag 14. After the high-temperature flue gas is drawn into the bag filter 1 under negative pressure, it will be cleaned by the filter bag 14. The cleaned exhaust gas will be discharged through the exhaust hole 12. At this time, the high-temperature exhaust gas will enter the jacket 2 through the pipe and flow in the jacket 2 until it is discharged along both sides of the jacket 2. The high-temperature exhaust gas in the jacket 2 will heat the compressed airflow in the bag filter 1 through heat conduction to achieve preheating of the compressed airflow and further reduce the temperature difference between the high-temperature exhaust gas and the compressed airflow. By setting the first baffle 3 and the second baffle, Plate 32, when the high-temperature exhaust gas flows within the jacket 2, increases the flow path due to the obstruction of the first baffle 3 and the second baffle 32, thereby increasing the time for the high-temperature exhaust gas to heat the compressed airflow inside the bag filter 1, further improving the utilization rate of the waste heat inside the high-temperature exhaust gas; the frame 15 provides internal support for the filter bag 14. When the pulse airflow blows the filter bag 14, the filter bag 14 will expand and sway, and the protective pad 44 will contact the inner wall of the filter bag 14 when the filter bag 14 sways. Since the surface of the protective pad 44 is made of a smooth material, it can reduce the friction and wear experienced by the filter bag 14 when it contacts the protective pad 44, and also reduce the direct contact between the filter bag 14 and the frame 15, thus extending the service life of the filter bag 14. Service life; By setting the limiting groove 5 and the fixing block 52, when installing the frame 15 into the bag 14, the limiting groove 5 can be aligned with the fixing block 52 first, and then the frame 15 can be installed on the surface of the tube sheet 13 and inside the bag 14, so that the frame 15 will not be deflected by the airflow, thereby reducing the friction between it and the bag 14; By setting the third baffle 6, the pulsed airflow will come into contact with the third baffle 6 after entering the bag 14. The third baffle 6 will obstruct the airflow to reduce its flow rate, and avoid damage to the surface of the bag 14 due to excessive compressed airflow. At the same time, because the third baffle 6 is a frustum structure, it can expand the airflow, which facilitates the airflow to blow onto the inner wall of the bag 14.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-temperature filter bag pulse jet cleaning device, comprising a baghouse dust collector (1), wherein an air tank (16) is fixedly connected to one side of the baghouse dust collector (1); one side of the air tank (16) is connected to a compressed air supply device; characterized in that: The top of the bag filter (1) is provided with a waste discharge hole (12); the inner wall of the bag filter (1) is fixedly connected with a tube sheet (13); multiple filter bags (14) are installed in the tube sheet (13); the filter bags (14) are provided with a frame (15) inside; the top of the air tank (16) is connected to multiple pulse tubes (17); the pulse tubes (17) and the bag filter (1) are connected through each other and extend to the inner wall of the bag filter (1); the bottom of the pulse tubes (17) located inside the bag filter (1) is provided with multiple air jet holes, and the air jet holes and the filter bags (14) are correspondingly arranged; a protective sleeve (18) is fixedly connected to the middle of the pulse tubes (17); a heating wire (19) is fixedly connected to the inner wall of the protective sleeve (18).

2. The high-temperature filter bag pulse jet blowing device according to claim 1, characterized in that: The outer wall of the air bag (16) is fixed with a jacket (2); the jacket (2) and the pulse tube (17) are connected through each other; the jacket (2) and the exhaust hole (12) are connected by a pipe, and exhaust holes are opened on both sides of the jacket (2).

3. The high-temperature filter bag pulse jet blowing device according to claim 2, characterized in that: The inner walls of the jacket (2) are respectively fixed with a first baffle (3) and a second baffle (32); the first baffle (3) and the second baffle (32) are staggered.

4. The high-temperature filter bag pulse jet blowing device according to claim 3, characterized in that: The frame (15) includes a cover plate (4), multiple connecting rods (42), and multiple connecting rings (43); the multiple connecting rods (42) and the frame (15) are fixedly connected; the connecting rings (43) and the multiple connecting rods (42) are also fixedly connected; a protective pad (44) is fixedly connected to the outer wall of the connecting ring (43); the protective pad (44) is located between the connecting ring (43) and the cloth bag (14).

5. A high-temperature filter bag pulse jet blowing device according to claim 4, characterized in that: The outer wall of the cover plate (4) is provided with multiple limiting grooves (5); the inner wall of the flower plate (13) is fixed with multiple fixing blocks (52); the limiting grooves (5) and the fixing blocks (52) are set in a corresponding manner.

6. The high-temperature filter bag pulse jet blowing device according to claim 5, characterized in that: A third baffle (6) is fixed between adjacent connecting rods (42); the third baffle (6) and the connecting ring (43) are correspondingly arranged and are frustum structures.

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