Online cleaning device for desulfurization flue gas heat exchanger

Abstract

The online cleaning device comprises a heat exchanger body and a gas inlet pipe fixedly arranged on one side of the heat exchanger body in a penetrating mode, a filter screen is fixedly connected in the gas inlet pipe, and a collecting shell with an opening in the top is fixedly arranged on the lower half portion of the gas inlet pipe in a penetrating mode. A filter screen is arranged in the air inlet pipe, lead screws are vertically and rotatably connected to the positions, located on the two opposite sides of the filter screen, in the air inlet pipe, the lead screws partially extend out of the air inlet pipe, a driving part is arranged between the two lead screws, a cleaning part is arranged in the air inlet pipe, a top shell is fixedly connected to the top of the air inlet pipe, and a reverse blowing part is arranged in the top shell. The utility model relates to the technical field of heat exchangers. When the motor works, the spiral plate is driven to move on the surface of the filter screen, dust attached to the surface of the filter screen is scraped off, meanwhile, the spray head sprays air to the filter screen, airflow reversely penetrates through the filter screen, dust clamped in the hole diameter of the filter screen is flushed out, and the cleaning effect of the filter screen is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to an online cleaning device for a desulfurization flue gas heat exchanger. Background Art

[0002] The desulfurized flue gas heat exchanger is a heat exchange device that uses the heat of a high-temperature fluid to heat a low-temperature fluid. The heat pipe in the heat exchanger is generally composed of a tube shell and an internal working liquid (working fluid). The tube shell is made of steel and is a vacuum-evacuated sealed tube shell, and the working fluid is a specially treated liquid. Since the flue gas contains a lot of dust, it needs to enter the corresponding filter device before entering the heat exchanger.

[0003] For example, the Chinese patent with the publication number CN213421913U discloses an online cleaning device for a desulfurized flue gas heat exchanger, including a heat exchanger body; a spiral tube shell is arranged inside the heat exchanger body, the middle part of the left side of the heat exchanger body is connected with an air inlet pipe, a fixing frame is vertically fixedly installed on the right side of the inner wall of the air inlet pipe, the left side of the fixing frame penetrates the filter screen plate by bolts and is fixedly connected, an electric telescopic rod is fixedly installed on the top inner wall of the air inlet pipe, and the bottom end of the electric telescopic rod penetrates the top inner wall of the air inlet pipe and is connected with a brush. The utility model is capable of filtering dust in the flue gas by vertically fixing the filter screen plate inside the air inlet pipe. When the filter screen plate needs to be cleaned, the electric telescopic rod is controlled to work, and the brush can be pushed to move up and down on the left side of the filter screen plate, thereby automatically cleaning the dust filtered on the left side of the filter screen plate, and the cleaned dust falls into the collection box for storage, with a simple structure and high working efficiency.

[0004] In this patent, the filter is cleaned by scraping off the dust on the surface of the filter with a brush. However, in actual work, some dust may be stuck in the aperture of the filter, and the bristles cannot scrape it off, and may even cause it to be further stuck, so the cleaning effect is not good. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an online cleaning device for a desulfurization flue gas heat exchanger, so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A desulfurization flue gas heat exchanger online cleaning device comprises a heat exchanger body and an air intake pipe fixedly penetrated through one side of the heat exchanger body, a filter screen is fixedly connected inside the air intake pipe, a collecting shell with a top opening is fixedly penetrated through the lower half of the air intake pipe, screws are vertically rotatably connected at opposite sides of the filter screen inside the air intake pipe, the screw parts extend to the outside of the air intake pipe, a driving part is arranged between the two screws, a cleaning part is arranged inside the air intake pipe, a top shell is fixedly connected to the top of the air intake pipe, and a back-blowing part is arranged inside the top shell.

[0008] In a preferred example, the utility model can be further configured as follows: the cleaning part is a screw plate threadedly connected to the outer peripheral surface of the corresponding screw, the screw plate is located on the side of the filter away from the heat exchanger body, and the opposite side walls of the screw plate in the width direction are both in contact with the inner wall of the air inlet pipe, and the side of the screw plate close to the filter is coplanar with the side wall of the filter.

[0009] In a preferred example, the utility model can be further configured as follows: the driving part includes a motor fixedly connected to the top of the intake pipe, the output end of the motor is transmission-connected with a driving gear, the outer circumferences of the two lead screws are fixedly sleeved with driven gears, and the driving gear is meshed with the two driven gears.

[0010] In a preferred example, the utility model can be further configured as follows: the back-blowing portion includes a screw block threadedly connected to the outer peripheral surface of the corresponding screw, and the two opposite sides of the screw block in the width direction are both in contact with the inner wall of the air inlet pipe, and a plurality of nozzles are fixedly connected to the side of the screw block away from the heat exchanger body, and the side of the nozzle away from the screw block is in contact with the side wall of the filter screen;

[0011] A piston is interference fit in the top shell, a first one-way valve is provided on the upper half of one side of the top shell, a linkage rod is fixedly connected to the side of the screw block away from the nozzle, the linkage rod is L-shaped, and the vertical section of the linkage rod slides through the top wall of the intake pipe and is fixedly connected to the bottom of the piston, a hose is fixedly passed through the top of the intake pipe and is communicated with a plurality of the nozzles.

[0012] In a preferred example, the utility model can be further configured as follows: a second one-way valve is provided on the outer peripheral side of the hose.

[0013] In a preferred example, the utility model can be further configured as follows: a wind shield is fixedly connected to the bottom of the screw plate, a gap is left between the wind shield and the filter, and the wind shield and the plurality of nozzles are located at the same height.

[0014] In summary, the present invention includes at least one of the following beneficial technical effects:

[0015] 1. This is an online cleaning device for a desulfurization flue gas heat exchanger. When the motor is working, it drives the screw plate to move on the surface of the filter screen to scrape off the dust attached to the surface of the filter screen. At the same time, the nozzle sprays air toward the filter screen, and the airflow passes through the filter screen in the reverse direction to flush out the dust stuck in the filter screen aperture, thereby improving the cleaning effect of the filter screen;

[0016] 2. In the online cleaning device for the desulfurization flue gas heat exchanger, the wind shield is arranged so that the flue gas will not impact the part of the nozzle that recoils the filter, thereby ensuring that the dust can be recoiled from the filter by the airflow ejected from the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a three-dimensional diagram of an online cleaning device for a desulfurization flue gas heat exchanger according to the present embodiment;

[0019] Figure 2 It is a partial three-dimensional diagram of an online cleaning device for a desulfurization flue gas heat exchanger according to the present embodiment;

[0020] Figure 3 It is a front cross-sectional view of an air inlet pipe in an online cleaning device for a desulfurization flue gas heat exchanger according to this embodiment.

[0021] In the figure, 1. heat exchanger body; 2. air inlet pipe; 3. filter screen; 4. collecting shell; 5. screw; 6. driving part; 61. motor; 62. driving gear; 63. driven gear; 7. cleaning part; 71. screw plate; 8. top shell; 9. backblowing part; 91. screw block; 92. nozzle; 93. piston; 94. first one-way valve; 95. linkage rod; 96. hose; 10. second one-way valve; 11. wind shield. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Example:

[0024] Reference Figures 1 to 3 The utility model discloses an online cleaning device for a desulfurization flue gas heat exchanger, comprising a heat exchanger body 1 and an air intake pipe 2 fixedly arranged on one side of the heat exchanger body 1, wherein a filter screen 3 is fixedly connected to the air intake pipe 2.

[0025] A collecting shell 4 with an opening at the top is fixedly penetrated in the lower half of the air intake pipe 2. Lead screws 5 are vertically rotatably connected at opposite sides of the filter screen 3 in the air intake pipe 2, and part of the lead screws 5 extend to the outside of the air intake pipe 2, and a driving part 6 is arranged between the two lead screws 5. A cleaning part 7 is arranged in the air intake pipe 2, and a top shell 8 is fixedly connected to the top of the air intake pipe 2, and a back-blowing part 9 is arranged in the top shell 8.

[0026] In this embodiment, the collection shell 4 is connected to the air inlet pipe 2, and the dust blocked by the filter screen 3 can fall into the collection shell 4 when falling vertically. A material extraction plug is threadedly connected to the bottom of the collection shell 4, and the material extraction plug can be removed by rotating it, so that the dust in the collection shell 4 leaves the collection shell 4.

[0027] In a further preferred embodiment of the present invention, Figure 3 As shown, the cleaning portion 7 is a screw plate 71 threadedly connected to the outer peripheral surface of the corresponding screw 5, and the screw plate 71 is located on the side of the filter 3 away from the heat exchanger body 1. The opposite side walls of the screw plate 71 in the width direction are both in contact with the inner wall of the air inlet pipe 2, and the side of the screw plate 71 close to the filter 3 is coplanar with the side wall of the filter 3.

[0028] In this embodiment, in the initial state, the screw plate 71 is located at the upper half of the filter screen 3. When the corresponding lead screw 5 rotates, the screw plate 71 is driven to move vertically downward, and the screw plate 71 scrapes off the dust attached to the surface of the filter screen 3, and the dust falls into the collection shell 4.

[0029] In a further preferred embodiment of the present invention, Figure 1 As shown, the driving unit 6 includes a motor 61 fixedly connected to the top of the intake pipe 2, the output end of the motor 61 is transmission-connected to a driving gear 62, and the outer circumferences of the two lead screws 5 are fixedly sleeved with driven gears 63, and the driving gear 62 is meshed with the two driven gears 63.

[0030] In this embodiment, the motor 61 drives the driving gear 62 to rotate, and the driving gear 62 drives the two driven gears 63 to rotate, thereby driving the two lead screws 5 to rotate synchronously.

[0031] In a further preferred embodiment of the present invention, Figure 3 As shown, the back-blowing part 9 includes a screw block 91 threadedly connected to the outer peripheral surface of the corresponding screw 5, and the opposite sides of the screw block 91 in the width direction are both in contact with the inner wall of the air inlet pipe 2. A plurality of nozzles 92 are fixedly connected to the side of the screw block 91 away from the heat exchanger body 1, and the side of the nozzle 92 away from the screw block 91 is in contact with the side wall of the filter screen 3.

[0032] A piston 93 is interference fit in the top shell 8, and a first one-way valve 94 is provided on the upper half of one side of the top shell 8. A linkage rod 95 is fixedly connected to the side of the screw block 91 away from the nozzle 92. The linkage rod 95 is L-shaped, and the vertical section of the linkage rod 95 slides through the top wall of the intake pipe 2 and is fixedly connected to the bottom of the piston 93. A hose 96 is fixedly penetrated on the top of the piston 93. The hose 96 is fixedly penetrated through the top wall of the intake pipe 2 and is connected to several nozzles 92.

[0033] In this embodiment, in the initial state, the screw block 91 is located at the upper half of the filter screen 3. The first one-way valve 94 is located above the piston 93, and the first one-way valve 94 can only allow airflow from outside the top shell 8 to enter the top shell 8. The hose 96 can be freely bent and stretched.

[0034] When the corresponding lead screw 5 rotates, the screw block 91 and the nozzle 92 are driven to fall, and the screw block 91 drives the linkage rod 95 and the piston 93 to fall, and the external airflow enters the top shell 8 through the first one-way valve 94. When the corresponding lead screw 5 is reversed, the screw block 91, the nozzle 92, the linkage rod 95 and the piston 93 move upward, and the gas above the piston 93 enters the nozzle 92 through the hose 96 and is ejected through the nozzle 92. The airflow passes through the filter 3 in the reverse direction, and the filter 3 is backwashed, and the dust stuck in the aperture of the filter 3 is blown out, thereby improving the cleaning effect of the filter 3.

[0035] In a further preferred embodiment of the present invention, Figure 3 As shown, a second one-way valve 10 is provided on the outer peripheral side of the hose 96 .

[0036] In this embodiment, the second one-way valve 10 can only allow airflow to move from above the piston 93 to below the piston 93 and cannot flow in the opposite direction, thereby preventing smoke from passing through the filter 3 and then entering the top shell 8 through the hose 96.

[0037] In a further preferred embodiment of the present invention, Figure 2 As shown, a wind shield 11 is fixedly connected to the bottom of the screw plate 71, a gap is left between the wind shield 11 and the filter 3, and the wind shield 11 and the plurality of nozzles 92 are located at the same height.

[0038] In this embodiment, the wind shield 11 is arranged so that the smoke will not impact the part of the nozzle 92 that recoils the filter 3, thereby ensuring that the dust can be recoiled away from the filter 3 by the airflow ejected from the nozzle 92.

[0039] The implementation principle of the above embodiment is:

[0040] In the initial state, the screw plate 71 is located at the upper half of the filter screen 3, and the screw block 91 is located at the upper half of the filter screen 3 (such as Figure 3 shown).

[0041] When the filter screen 3 needs to be cleaned, the motor 61 is started to work, and the motor 61 drives the driving gear 62 to rotate, and the driving gear 62 drives the two driven gears 63 to rotate, thereby driving the two lead screws 5 to rotate synchronously. When the lead screw 5 rotates, it drives the screw plate 71 and the screw block 91 to move vertically downward, and the screw plate 71 scrapes off the dust attached to the surface of the filter screen 3, and the dust falls into the collection shell 4. The screw block 91 drives the linkage rod 95 and the piston 93 to fall, and the external airflow enters the top shell 8 through the first one-way valve 94.

[0042] Then the motor 61 works in the reverse direction, driving the screw plate 71 and the screw block 91 to move in the reverse direction. The screw block 91 drives the linkage rod 95 and the piston 93 to move upward, and the gas above the piston 93 enters the nozzle 92 through the hose 96 and is ejected through the nozzle 92. The airflow passes through the filter screen 3 in the reverse direction, and the filter screen 3 is backwashed, and the dust stuck in the aperture of the filter screen 3 is blown out, thereby improving the cleaning effect of the filter screen 3.

[0043] When the screw plate 71 and the screw block 91 move to the initial position, the motor 61 is turned off. The material taking plug is opened to take out the dust in the collecting shell 4.

[0044] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An online cleaning device for a flue gas heat exchanger for desulfurization, comprising a heat exchanger body (1) and an air inlet pipe (2) fixedly arranged on one side of the heat exchanger body (1), characterized in that: A filter screen (3) is fixedly connected inside the air intake pipe (2), a collecting shell (4) with a top opening is fixedly penetrated through the lower half of the air intake pipe (2), lead screws (5) are vertically rotatably connected at opposite sides of the filter screen (3) inside the air intake pipe (2), a portion of the lead screw (5) extends to the outside of the air intake pipe (2), and a driving part (6) is arranged between the two lead screws (5), a cleaning part (7) is arranged inside the air intake pipe (2), a top shell (8) is fixedly connected to the top of the air intake pipe (2), and a back-blowing part (9) is arranged inside the top shell (8).

2. The online cleaning device for a desulfurization flue gas heat exchanger according to claim 1 is characterized in that: The cleaning portion (7) is a screw plate (71) threadedly connected to the outer peripheral surface of the corresponding screw (5); the screw plate (71) is located on the side of the filter (3) away from the heat exchanger body (1); and the opposite side walls of the screw plate (71) in the width direction are both in contact with the inner wall of the air inlet pipe (2); and the side of the screw plate (71) close to the filter (3) is coplanar with the side wall of the filter (3).

3. The online cleaning device for a desulfurization flue gas heat exchanger according to claim 1 is characterized in that: The driving unit (6) comprises a motor (61) fixedly connected to the top of the air intake pipe (2); the output end of the motor (61) is drivingly connected to a driving gear (62); the outer circumferential surfaces of the two lead screws (5) are fixedly sleeved with driven gears (63); the driving gear (62) is meshed with the two driven gears (63).

4. The online cleaning device for a desulfurization flue gas heat exchanger according to claim 2 is characterized in that: The back-blowing portion (9) comprises a screw block (91) threadedly connected to the outer peripheral surface of the corresponding screw (5), the two opposite sides of the screw block (91) in the width direction are both in contact with the inner wall of the air inlet pipe (2), and a plurality of nozzles (92) are fixedly connected to the side of the screw block (91) away from the heat exchanger body (1), and the side of the nozzle (92) away from the screw block (91) is in contact with the side wall of the filter screen (3); A piston (93) is interference-fitted in the top shell (8), a first one-way valve (94) is provided on the upper half of one side of the top shell (8), a linkage rod (95) is fixedly connected to the side of the screw block (91) away from the nozzle (92), the linkage rod (95) is L-shaped, and the vertical section of the linkage rod (95) slides through the top wall of the intake pipe (2) and is fixedly connected to the bottom of the piston (93), a hose (96) is fixedly penetrated through the top wall of the intake pipe (2) and is in communication with a plurality of nozzles (92).

5. The online cleaning device for a desulfurization flue gas heat exchanger according to claim 4 is characterized in that: A second one-way valve (10) is provided on the outer peripheral side of the hose (96).

6. The online cleaning device for a desulfurization flue gas heat exchanger according to claim 4 is characterized in that: A windshield (11) is fixedly connected to the bottom of the screw plate (71), a gap is left between the windshield (11) and the filter screen (3), and the windshield (11) and the plurality of nozzles (92) are located at the same height.

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