A fabric filter dust collector for flue gas with waste heat recovery function

Abstract

The present invention discloses a flue gas bag filter with a waste heat recovery function, which relates to the technical field of bag filters and includes a dust collector box body, a mounting plate, a plurality of dust removal bags and a plurality of blowing pipes. A waste heat recovery mechanism extending to the outside of the dust collector box body is arranged inside the dust collector box body, and an adjusting mechanism for driving the limiting shaft is arranged inside the dust collector box body. The waste heat recovery mechanism includes a first water guide pipe, a second water guide pipe, a plurality of water inlet pipes, a plurality of water return pipes and a plurality of heat exchange pipes. By setting the waste heat recovery mechanism and the adjusting mechanism, while the heat exchange pipes install and support the dust removal bags, the heat exchange pipes absorb the heat in the flue gas and transfer the heat to the circulating water to achieve heat exchange, so as to achieve the purpose of waste heat recovery, improve the energy utilization rate, and can quickly extinguish the fire when a fire occurs by releasing the circulating water to reduce losses.

Description

Technical Field

[0001] The present invention relates to the technical field of bag filters, and specifically to a flue gas bag filter with a waste heat recovery function. Background Technique

[0002] A bag filter is a dry dust filtering device, which is suitable for collecting fine, dry, non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt, and the fibrous fabric is used to filter the dust-containing gas. When the dust-containing gas enters the bag filter, dust with large particles and high specific gravity settles down due to the action of gravity and falls into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is retained, and the gas is purified. Petroleum coke is a black or dark gray hard solid petroleum product with a metallic luster and is porous. It is a carbonaceous material composed of granular, columnar or needle-shaped micro graphite crystals. When calcining petroleum coke or green coke, it is necessary to pass the flue gas into the bag filter for filtration treatment.

[0003] When treating the flue gas, since the temperature of the flue gas generated by combustion is relatively high, if it is directly discharged, a large amount of heat will be dissipated, resulting in energy waste and reduced energy utilization rate. Moreover, when installing the dust removal bag, a grid frame is required to support the dust removal bag. In order to recover and utilize the waste heat and improve the energy utilization rate, therefore, a flue gas bag filter with a waste heat recovery function is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a flue gas bag filter with a waste heat recovery function to solve the problem of low energy utilization rate.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A flue gas bag filter with a waste heat recovery function, including a dust collector box body, a mounting plate, a plurality of dust removal bags and a plurality of spray pipes. The bottom ends of the plurality of spray pipes are connected with a plurality of three-way valves, and the plurality of three-way valves are respectively located above the plurality of dust removal bags. One side of the three-way valve is provided with a hand lever connected to the valve core shaft of the three-way valve, and a limiting shaft is welded to the outer wall of the hand lever. A waste heat recovery mechanism extending to the outside of the dust collector box body is arranged inside the dust collector box body, and an adjusting mechanism for driving the limiting shaft is arranged inside the dust collector box body;

[0006] The waste heat recovery mechanism includes a first water guide pipe, a second water guide pipe, a plurality of water inlet pipes, a plurality of water return pipes and a plurality of heat exchange pipes;

[0007] The first water conduit is fixedly installed at one end of the outer wall of the dust collector box body. The second water conduit is fixedly installed at one end of the outer wall of the dust collector box body and is located below the first water conduit. A plurality of water inlet pipes are connected to the outer wall of the second water conduit and penetrate into the interior of the dust collector box body. One input end of the three-way valve is connected to the water inlet pipe;

[0008] A plurality of water return pipes are connected to the outer wall of the first water conduit and penetrate into the interior of the dust collector box body;

[0009] A heat exchange pipe is installed inside the dust removal cloth bag. The input end of the heat exchange pipe is connected to the water inlet pipe, and the output end of the heat exchange pipe is connected to the water return pipe;

[0010] The adjusting mechanism includes a plurality of limit blocks, a plurality of connecting rods and a plurality of sliding rods;

[0011] A plurality of the connecting rods are slidably installed inside the dust collector box body and are located above the dust removal cloth bag. A plurality of the limit blocks are welded to the bottom ends of the connecting rods and sleeved on the outer wall of the limit shaft. A plurality of the sliding rods are respectively welded to one ends of the plurality of the connecting rods and penetrate to the outside of the dust collector box body. A transmission mechanism for adjusting the positions of the plurality of the sliding rods is arranged at one end of the outer wall of the dust collector box body.

[0012] As a further scheme of the present invention: The transmission mechanism includes a connecting plate, a screw rod and a hand wheel. The screw rod is rotatably installed at one end of the outer wall of the dust collector box body. The connecting plate is threadedly connected to the outer wall of the screw rod. A plurality of the sliding rods are all welded to the connecting plate. The hand wheel is welded to one end of the screw rod.

[0013] As a further scheme of the present invention: A plurality of connecting support feet are formed at the top end of the connecting plate. The connecting plate is welded to the plurality of the sliding rods respectively through the plurality of the connecting support feet. Circular holes are formed inside the connecting support feet and the connecting plate. A plurality of guide shafts are welded to the outer wall of the dust collector box body. The plurality of the guide shafts respectively penetrate through the plurality of the circular holes, and the inner wall of the circular hole matches the outer wall of the guide shaft.

[0014] As a further scheme of the present invention: A blow gas bag connected to the blow pipe is fixedly installed at one end of the outer wall of the dust collector box body. The first water conduit and the second water conduit are installed at one end of the outer wall of the dust collector box body through a first fixing frame. The first water conduit is connected to an external hot water tank. The second water conduit is connected to an external cold water tank. A water pump is connected to one end of the second water conduit located at the cold water tank.

[0015] As a further solution of the present invention: several rectangular sleeves are welded at one end of the inner wall of the dust collector box body. The inner wall of the rectangular sleeve is matched with the outer wall of the connecting rod. A chute matched with the outer wall of the sliding rod is formed at the other end of the inner wall of the dust collector box body, and the chute is slidably connected with the sliding rod through a sealing component.

[0016] As a further solution of the present invention: a travel groove is formed inside the limit block, and both ends of the inner wall of the travel groove are in contact with the outer wall of the limit shaft.

[0017] As a further solution of the present invention: the heat exchange tube is of a spiral structure, and the outer diameter of the heat exchange tube is smaller than the inner diameter of the dust removal bag.

[0018] As a further solution of the present invention: an exhaust pipe is installed above the mounting plate on one side of the outer wall of the dust collector box body, an air inlet is installed below the mounting plate on one side of the outer wall of the dust collector box body, and a dust hopper is installed at the bottom end of the dust collector box body.

[0019] As a further solution of the present invention: a spark detector is installed at the bottom end inside the dust collector box body. The spark detector is connected to an external controller, and an audible and visual alarm connected to the controller is installed on the outer wall of the dust collector box body.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: by setting a waste heat recovery mechanism and an adjustment mechanism, while the heat exchange tube installs and supports the dust removal bag, the heat exchange tube absorbs the heat in the flue gas and transfers the heat to the circulating water to achieve heat exchange, so as to achieve the purpose of waste heat recovery, improve energy utilization rate, and can quickly extinguish the fire in case of a fire by releasing the circulating water to reduce losses. Brief Description of the Drawings

[0021] Figure 1 is a structural schematic diagram of the present invention;

[0022] Figure 2 is the present invention Figure 1 Enlarged view of part A in;

[0023] Figure 3 is a sectional structural diagram of the dust collector box body of the present invention;

[0024] Figure 4 is the present invention Figure 3 Enlarged view of part B in;

[0025] Figure 5 is the present invention Figure 3 Enlarged view of part C in;

[0026] Figure 6Schematic diagram of the connection of some parts of the waste heat recovery mechanism and the adjustment mechanism of the present invention;

[0027] Figure 7 For the present invention Figure 6 Enlarged view at position D in;

[0028] Figure 8 Schematic diagram of the connection of some parts of the waste heat recovery mechanism and the adjustment mechanism of the present invention from another angle;

[0029] Figure 9 For the present invention Figure 8 Enlarged view at position E in.

[0030] In the figure: 1. Dust collector box body; 2. Installation plate; 3. Dust removal cloth bag; 4. Waste heat recovery mechanism; 401. Water inlet pipe; 402. Water return pipe; 403. Heat exchange pipe; 404. First water guide pipe; 405. Second water guide pipe; 5. Adjustment mechanism; 501. Limit block; 502. Connecting rod; 503. Sliding rod; 6. Transmission mechanism; 601. Connecting plate; 602. Screw rod; 603. Hand wheel; 7. Blowing pipe; 8. Three-way valve; 9. Hand lever; 10. Limit shaft; 11. Guide shaft. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1 to 9 , in the embodiment of the present invention, a flue gas bag filter with waste heat recovery function includes a dust collector box body 1, an installation plate 2, a plurality of dust removal cloth bags 3 and a plurality of blowing pipes 7. The bottom ends of the plurality of blowing pipes 7 are connected with a plurality of three-way valves 8. The plurality of three-way valves 8 are respectively located above the plurality of dust removal cloth bags 3. One side of the three-way valve 8 is provided with a hand lever 9 connected to the valve core shaft of the three-way valve 8. The outer wall of the hand lever 9 is welded with a limit shaft 10. A waste heat recovery mechanism 4 extending to the outside of the dust collector box body 1 is arranged inside the dust collector box body 1, and an adjustment mechanism 5 for driving the limit shaft 10 is arranged inside the dust collector box body 1;

[0033] The waste heat recovery mechanism 4 includes a first water guide pipe 404, a second water guide pipe 405, a plurality of water inlet pipes 401, a plurality of water return pipes 402 and a plurality of heat exchange pipes 403;

[0034] The first water conduit 404 is fixedly installed at one end of the outer wall of the dust collector housing 1. The second water conduit 405 is fixedly installed at one end of the outer wall of the dust collector housing 1 and is located below the first water conduit 404. A plurality of water inlet pipes 401 are connected to the outer wall of the second water conduit 405 and penetrate into the interior of the dust collector housing 1. One input end of the three-way valve 8 is connected to the water inlet pipe 401. It should be noted that the two input ends of the three-way valve 8 are respectively connected to the water inlet pipe 401 and the injection pipe 7. The output end of the three-way valve 8 is kept vertically downward and faces the top end of the dust removal bag 3.

[0035] A plurality of water return pipes 402 are connected to the outer wall of the first water conduit 404 and penetrate into the interior of the dust collector housing 1.

[0036] A heat exchange pipe 403 is installed inside the dust removal bag 3. The input end of the heat exchange pipe 403 is connected to the water inlet pipe 401, and the output end of the heat exchange pipe 403 is connected to the water return pipe 402. The heat exchange pipe 403 is in a spiral structure, and the outer diameter of the heat exchange pipe 403 is smaller than the inner diameter of the dust removal bag 3.

[0037] The adjusting mechanism 5 includes a plurality of limit blocks 501, a plurality of connecting rods 502, and a plurality of sliding rods 503.

[0038] A plurality of connecting rods 502 are slidably installed inside the dust collector housing 1 and are located above the dust removal bag 3. A plurality of limit blocks 501 are welded to the bottom ends of the connecting rods 502 and are sleeved on the outer wall of the limit shaft 10. A plurality of sliding rods 503 are respectively welded to one ends of the plurality of connecting rods 502 and penetrate to the outside of the dust collector housing 1. A transmission mechanism 6 for adjusting the positions of the plurality of sliding rods 503 is provided at one end of the outer wall of the dust collector housing 1.

[0039] The transmission mechanism 6 includes a connecting plate 601, a screw rod 602, and a hand wheel 603. The screw rod 602 is rotatably installed at one end of the outer wall of the dust collector housing 1. The connecting plate 601 is threadedly connected to the outer wall of the screw rod 602. A plurality of sliding rods 503 are all welded to the connecting plate 601. The hand wheel 603 is welded to one end of the screw rod 602. A spark detector is installed at the bottom end inside the dust collector housing 1. The spark detector is connected to an external controller, and an audible and visual alarm connected to the controller is installed on the outer wall of the dust collector housing 1.

[0040] In this embodiment: After cold water is provided to the water inlet pipe 401 through the second water conduit 405, the cold water is conveyed by the water inlet pipe 401 into the heat exchange pipe 403. While the heat exchange pipe 403 inside the dust removal bag 3 absorbs the heat inside the dust collector housing 1, the cold water is heated. The heated hot water is diverted into the water return pipe 402 and then discharged through the first water conduit 404, thereby realizing the recovery and utilization of the waste heat of the flue gas entering the dust collector housing 1. Through the mutual cooperation of the above parts, the purpose of waste heat recovery is achieved. The dust removal bag 3 is supported and installed by the heat exchange pipe 403, and there is no need to install a grid to support and install the dust removal bag 3.

[0041] Please refer particularly to Figure 1 、 Figure 2 and Figure 3 , a number of connecting feet are formed at the top of the connecting plate 601. The connecting plate 601 is respectively welded to a number of sliding rods 503 through a number of connecting feet. Round holes are formed inside the connecting feet and the connecting plate 601. A number of guide shafts 11 are welded to the outer wall of the dust collector housing 1. A number of guide shafts 11 respectively penetrate a number of round holes, and the inner wall of the round hole matches the outer wall of the guide shaft 11.

[0042] In this embodiment: When a fire breaks out inside the dust collector housing 1, the spark detector detects the fire and transmits a signal to the controller, causing the controller to control the audible and visual alarm to emit an alarm sound and flash the alarm light. After the operator reacts in time, by rotating the handwheel 603, the handwheel 603 drives the screw rod 602 to rotate. Under the guiding and supporting action of a number of guide shafts 11 on the connecting plate 601, while the connecting plate 601 moves in a limited way along the outer wall of the screw rod 602, the connecting plate 601 drives the sliding rod 503 to move, causing the sliding rod 503 to drive the connecting rod 502 to move, so that the connecting rod 502 drives the limiting block 501 to move, causing the limiting block 501 to drive the limiting shaft 10 to move, and thus the limiting shaft 10 drives the hand lever 9 to rotate, causing the hand lever 9 to switch the three-way valve 8, allowing the cold water inside the water inlet pipe 401 to enter the three-way valve 8, and causing the three-way valve 8 to spray cold water into the dust removal bag 3, preventing the dust removal bag 3 from catching fire, reducing the fire loss, and improving the fire extinguishing speed.

[0043] Please refer particularly to Figure 3 、 Figure 5 、 Figure 8 and Figure 9 , one end of the outer wall of the dust collector housing 1 is fixedly installed with a spray gas bag connected to the spray pipe 7. The first water conduit 404 and the second water conduit 405 are installed at one end of the outer wall of the dust collector housing 1 through the first fixing frame. The first water conduit 404 is connected to an external hot water tank, the second water conduit 405 is connected to an external cold water tank, and a water pump is connected to one end of the second water conduit 405 located at the cold water tank.

[0044] In this embodiment: Cold water in the cold water tank is conveyed to the second water conduit 405 by a water pump, and then conveyed into the water inlet pipe 401 by the second water conduit 405. After the cold water in the water inlet pipe 401 is heated in the heat exchange pipe 403, the hot water flows back into the first water conduit 404 through the water return pipe 402, and the first water conduit 404 conveys it into the hot water tank. High-pressure gas is blown into the blowing pipe 7 through the blowing air bag, and the high-pressure gas is blown into the dust removal cloth bag 3 through the three-way valve 8, causing the dust removal cloth bag 3 to vibrate and discharge ash.

[0045] Please refer specifically to Figure 1 , Figure 2 and Figure 7 , several rectangular sleeves are welded to one end of the inner wall of the dust collector housing 1. The inner wall of the rectangular sleeve matches the outer wall of the connecting rod 502. A chute matching the outer wall of the sliding rod 503 is formed at the other end of the inner wall of the dust collector housing 1, and the chute is slidably connected to the sliding rod 503 through a sealing component.

[0046] In this embodiment: The sliding rod 503 is driven to move by the connecting plate 601. While the sliding rod 503 slides along the limit of the chute, the sliding rod 503 drives the connecting rod 502 to move, and the connecting rod 502 slides along the limit of the inner wall of the rectangular sleeve, enabling the rectangular sleeve to provide sliding support for the connecting rod 502.

[0047] Please refer specifically to Figure 4 , Figure 7 , a travel groove is formed inside the limit block 501, and both ends of the inner wall of the travel groove are in contact with the outer wall of the limit shaft 10.

[0048] In this embodiment: The connecting rod 502 drives the limit block 501 to move. While the limit block 501 drives the limit shaft 10 to move, the limit shaft 10 drives the hand lever 9 to rotate. While the hand lever 9 drives the valve shaft of the three-way valve 8 to rotate, the limit shaft 10 moves along the limit of the travel groove inside the limit block 501.

[0049] Please refer specifically to Figure 1 , Figure 3 , an exhaust pipe is installed above the mounting plate 2 on one side of the outer wall of the dust collector housing 1, an air inlet is installed below the mounting plate 2 on one side of the outer wall of the dust collector housing 1, and a dust hopper is installed at the bottom end of the dust collector housing 1.

[0050] In this embodiment: Dust-containing flue gas is introduced into the dust collector housing 1 through the air inlet, and the flue gas is filtered by the dust removal cloth bag 3. After that, the filtered flue gas is discharged through the exhaust pipe. After high-pressure gas is blown onto the dust removal cloth bag 3 through the blowing pipe 7 and the three-way valve 8, the dust filtered on the outer wall of the dust removal cloth bag 3 drops into the dust hopper for collection and discharge.

[0051] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered within the protection scope of the present invention.

Claims

1. A flue gas bag filter with waste heat recovery function, comprising a dust collector box body (1), a mounting plate (2), a plurality of dust removal bags (3) and a plurality of spray pipes (7), characterized in that, The bottoms of several of the injection pipes (7) are connected to several three-way valves (8). The several three-way valves (8) are respectively located above the several dust removal cloth bags (3). One side of the three-way valve (8) is provided with a hand lever (9) connected to the valve core shaft of the three-way valve (8). A limit shaft (10) is welded to the outer wall of the hand lever (9). A waste heat recovery mechanism (4) extending outside the dust collector box body (1) is arranged inside the dust collector box body (1). An adjusting mechanism (5) for driving the limit shaft (10) is arranged inside the dust collector box body (1). The waste heat recovery mechanism (4) includes a first water guide pipe (404), a second water guide pipe (405), several water inlet pipes (401), several water return pipes (402), and several heat exchange pipes (403). The first water guide pipe (404) is fixedly installed at one end of the outer wall of the dust collector box body (1). The second water guide pipe (405) is fixedly installed at one end of the outer wall of the dust collector box body (1) and is located below the first water guide pipe (404). Several of the water inlet pipes (401) are connected to the outer wall of the second water guide pipe (405) and penetrate into the interior of the dust collector box body (1). One input end of the three-way valve (8) is connected to the water inlet pipe (401). Several of the water return pipes (402) are connected to the outer wall of the first water guide pipe (404) and penetrate into the interior of the dust collector box body (1). A heat exchange pipe (403) is installed inside the dust removal cloth bag (3). The input end of the heat exchange pipe (403) is connected to the water inlet pipe (401), and the output end of the heat exchange pipe (403) is connected to the water return pipe (402). The adjusting mechanism (5) includes several limit blocks (501), several connecting rods (502), and several sliding rods (503). Several of the connecting rods (502) are slidably installed inside the dust collector box body (1) and are located above the dust removal cloth bags (3). Several of the limit blocks (501) are welded to the bottom ends of the connecting rods (502) and sleeved on the outer wall of the limit shaft (10). Several of the sliding rods (503) are respectively welded to one ends of the several connecting rods (502) and penetrate outside the dust collector box body (1). A transmission mechanism (6) for adjusting the positions of the several sliding rods (503) is arranged at one end of the outer wall of the dust collector box body (1). The transmission mechanism (6) includes a connecting plate (601), a screw rod (602), and a hand wheel (603). The screw rod (602) is rotatably installed at one end of the outer wall of the dust collector box body (1). The connecting plate (601) is threadedly connected to the outer wall of the screw rod (602). Several of the sliding rods (503) are welded to the connecting plate (601). The hand wheel (603) is welded to one end of the screw rod (602). Several connecting feet are formed at the top of the connecting plate (601). The connecting plate (601) is welded to several sliding rods (503) respectively through several connecting feet. Round holes are formed inside the connecting feet and the connecting plate (601). Several guide shafts (11) are welded to the outer wall of the dust collector box body (1). Several guide shafts (11) respectively penetrate through several round holes, and the inner wall of the round hole matches the outer wall of the guide shaft (11).

2. The flue gas bag filter with waste heat recovery function according to claim 1, characterized in that, One end of the outer wall of the dust collector box body (1) is fixedly installed with a blow gas bag connected to the blow pipe (7). The first water guide pipe (404) and the second water guide pipe (405) are installed on one end of the outer wall of the dust collector box body (1) through a first fixing frame. The first water guide pipe (404) is connected to an external hot water tank, the second water guide pipe (405) is connected to an external cold water tank, and a water pump is connected to one end of the second water guide pipe (405) located in the cold water tank.

3. The flue gas bag filter with waste heat recovery function according to claim 1, characterized in that, Several rectangular sleeves are welded to one end of the inner wall of the dust collector box body (1). The inner wall of the rectangular sleeve matches the outer wall of the connecting rod (502). A chute matching the outer wall of the sliding rod (503) is formed at the other end of the inner wall of the dust collector box body (1), and the chute is slidably connected to the sliding rod (503) through a sealing component.

4. The flue gas bag filter with waste heat recovery function according to claim 1, characterized in that, A travel groove is formed inside the limit block (501), and both ends of the inner wall of the travel groove are in contact with the outer wall of the limit shaft (10).

5. The flue gas bag filter with waste heat recovery function according to claim 1, characterized in that, The heat exchange tube (403) has a spiral structure, and the outer diameter of the heat exchange tube (403) is smaller than the inner diameter of the dust removal bag (3).

6. The flue gas bag filter with waste heat recovery function according to claim 1, characterized in that, An exhaust pipe is installed above the mounting plate (2) on one side of the outer wall of the dust collector box body (1), an air inlet is installed below the mounting plate (2) on one side of the outer wall of the dust collector box body (1), and a dust hopper is installed at the bottom end of the dust collector box body (1).

7. The flue gas bag filter with waste heat recovery function according to claim 1, characterized in that, A spark detector is installed at the bottom end inside the dust collector box body (1). The spark detector is connected to an external controller, and an audible and visual alarm connected to the controller is installed on the outer wall of the dust collector box body (1).

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