Rotary air preheater cleaning device

Abstract

The utility model relates to a rotary air preheater cleaning device which comprises a shell, an air preheater is arranged in the shell, a liquid storage tank is arranged on the outer side wall of the shell, a connecting pipe is arranged on the liquid storage tank, a water pump is arranged on the connecting pipe, a water outlet pipe is arranged at one end of the connecting pipe and rotationally arranged in the shell, and a plurality of nozzles are arranged on the water outlet pipe in a communicating mode. The water outlet direction of the spray head faces the air pre-heater, the shell is provided with the driving assembly for rotating the water outlet pipe, after the driving assembly is started, the spray head rotates on the air pre-heater in a small range, the water outlet range of the spray head is enlarged, and therefore the contact area of cleaning liquid and the interior of the air pre-heater is increased; the rotary air preheater has the effect of improving the cleaning effect of the rotary air preheater.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of air preheaters, in particular to a rotary air preheater cleaning device. BACKGROUND

[0002] The rotary air preheater is a heat exchange equipment for improving the heat exchange performance of a boiler. The rotary air preheater transfers heat in a regenerative mode, and heat transfer is achieved by alternatingly flowing flue gas and air through the heated surface of a rotor in the preheater. However, since the flue gas contains a large amount of dust, the dust is prone to adhere to the heat storage elements, and if not cleaned in time, the heat exchange efficiency of the air preheater will be reduced.

[0003] A Chinese patent with the publication number CN212916750U discloses an online water flushing device for an air preheater. The device comprises a bearing plate, multiple through grooves are equidistantly formed in the bearing plate, an air preheater body is connected to the top end of the bearing plate, a flushing mechanism is installed at the top end of the air preheater body, the flushing mechanism comprises a water storage tank, multiple high-pressure water pumps are fixed to one side in the water storage tank, a hose is fixedly installed at the top end of the high-pressure water pumps, a first conduit is fixedly connected to the other side of the hose, multiple spray heads are equidistantly installed at the bottom end of the first conduit, and the spray heads are connected to the air preheater body.

[0004] The flushing device can send water in the water storage tank to the first conduit through the multiple high-pressure water pumps, and the multiple spray heads equidistantly installed at the bottom end of the first conduit can quickly clean and flush the air preheater body, thereby improving the flushing efficiency and reducing dead angles in the flushing process. However, since multiple fan-shaped compartments are formed in the air preheater, the contact area between the water flow vertically falling from the spray heads and the air preheater is small, which leads to poor cleaning effect of the air preheater, and obvious defects exist. Content of the utility model

[0005] In order to improve the cleaning effect of the rotary air preheater, the application provides a rotary air preheater cleaning device.

[0006] The application provides a rotary air preheater cleaning device adopting the following technical scheme:

[0007] The rotary air preheater cleaning device comprises a shell, an air preheater is arranged in the shell, a liquid storage tank is arranged on the outer side wall of the shell, a connecting pipe is arranged on the liquid storage tank, a water pump is arranged on the connecting pipe, a water outlet pipe is arranged at one end of the connecting pipe, the water outlet pipe is rotatably arranged in the shell, multiple spray heads are communicatively arranged on the water outlet pipe, the water outlet direction of the spray heads is arranged towards the air preheater, and a driving assembly for rotating the water outlet pipe is arranged on the shell.

[0008] By adopting the technical scheme, the operator first places the air preheater in the shell, and then starts the water pump, the cleaning liquid in the liquid storage tank flows into the water outlet pipe and is sprayed from the spray head, under the flushing action of the cleaning liquid, the dust in the air preheater is cleaned, and under the action of the driving assembly, the water outlet pipe is rotated slightly and drives the spray head to rotate slightly on the air preheater, the water outlet range of the spray head is expanded, so that the contact area of the cleaning liquid with the inside of the air preheater is improved, and the cleaning effect on the rotary air preheater is improved.

[0009] Optionally, the driving assembly comprises an electric push rod arranged on the outer side wall of the shell, an output shaft of the electric push rod is fixedly connected with a rack, a gear is arranged in meshing mode on the rack, and the gear is fixedly sleeved on the water outlet pipe.

[0010] By adopting the technical scheme, after the operator starts the electric push rod, the electric push rod drives the rack to reciprocate, the rack reciprocation drives the gear to rotate forward or reversely within a certain range, the gear rotation drives the water outlet pipe to rotate, and thus the slight rotation of the spray head is realized.

[0011] Optionally, a sliding groove is arranged on the outer side wall of the shell, and a sliding block is slidably connected in the sliding groove, and one end of the sliding block is connected to the rack.

[0012] By adopting the technical scheme, the sliding cooperation between the sliding groove and the sliding block can make the sliding of the rack on the shell more smooth, meanwhile, the sliding groove at both ends can limit the movement range of the rack, effectively avoid the rack being pushed out of the working range by the electric push rod, improve the stability of the driving assembly, and thus ensure the smooth progress of the cleaning work.

[0013] Optionally, a base is arranged in the shell, the air preheater is rotatably connected to the base, an outer gear ring is sleeved on the outer side wall of the air preheater, a gear disc is arranged in meshing mode on one side of the outer gear ring, and a motor is arranged on the base, and an output shaft of the motor is fixedly connected to the gear disc.

[0014] By adopting the technical scheme, under the driving of the motor, the gear disc rotation drives the outer gear ring to rotate, the outer gear ring drives the air preheater to rotate under the water outlet pipe, after the air preheater rotates one circle, the cleaning liquid will wash the air preheater in all directions, the contact range of the cleaning liquid with the air preheater is further improved, and thus the cleaning effect on the rotary air preheater is improved.

[0015] Optionally, a dust shaking assembly is arranged in the shell, the dust shaking assembly comprises a plurality of knocking rods arranged on the side wall of the shell, a sliding groove is arranged on each knocking rod, a first spring is connected to the side wall of the sliding groove, a knocking hammer is connected to the first spring, the knocking hammer is an iron hammer, and a magnetic block for attracting the knocking hammer is arranged on the outer side wall of the air preheater.

[0016] By adopting the technical scheme, in the process of rotation of the air preheater, the relative position of the magnetic block and the knocking hammer changes, when the magnetic block rotates to the position closest to the knocking hammer, the magnetic block adsorbs the knocking hammer, the knocking hammer hits the air preheater shell, and the inside of the air preheater vibrates at the moment of hitting, so that the gap between the dust adhered in the air preheater and the air preheater becomes larger, the probability of the dust being washed away by the cleaning liquid is improved, and the cleaning effect on the rotary air preheater is further improved.

[0017] Optionally, a liquid supplement tank is arranged on the outer side wall of the shell, a water supplement pipe in communication with the liquid storage tank is arranged on the liquid supplement tank, and a water supplement assembly is arranged in the liquid storage tank.

[0018] By adopting the technical scheme, as the working time increases, the cleaning liquid in the liquid storage tank will decrease, at this time, the water supplement assembly in the liquid storage tank automatically operates and supplements the cleaning liquid in time, avoids the interruption of the cleaning process caused by the forgetting of the operator to add the cleaning liquid, and ensures the smooth progress of the cleaning process.

[0019] Optionally, the water supplement assembly comprises a vertical rod arranged in the liquid storage tank, a floating ball sleeved on the outer side wall of the vertical rod, a connecting rope arranged on the outer side wall of the floating ball, a blocking block arranged at one end of the connecting rope, the blocking block being slidingly connected in the water supplement pipe, a second spring arranged at one end of the blocking block, a connecting ring arranged on the inner side wall of the water supplement pipe, and one end of the second spring being connected to the connecting ring, and the outer side wall of the blocking block being closely attached to the inner side wall of the water supplement pipe in the natural state of the second spring.

[0020] By adopting the technical scheme, when the water level in the liquid storage tank decreases, the floating ball vertically descends on the vertical rod, when descending to a certain position, the blocking block connected to the connecting rope is separated from the water supplement pipe, the cleaning liquid in the liquid supplement tank enters the liquid storage tank, as the water level rises, the floating ball moves upward on the vertical rod, when rising to a certain height, the blocking block re-seals the water supplement pipe under the resetting action of the second spring, and the setting of the water supplement assembly can realize the automatic supplement of the cleaning liquid in the liquid storage tank.

[0021] Optionally, a drainage groove in communication with the fan-shaped compartments is arranged on the base, and a collection box is arranged in communication below the drainage groove, and the collection box is slidingly arranged in the shell.

[0022] By adopting the technical scheme, the cleaning liquid after contacting the air preheater flows into the collection box under the guidance of the drainage groove, the accumulation of the cleaning liquid in the air preheater is avoided, and the operator can also concentrate on the treatment of the cleaning liquid by drawing out the collection box.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The application sets up a drive assembly and a water outlet pipe, under the action of the drive assembly, the water outlet pipe produces small amplitude rotation and drives the nozzle to rotate on the air preheater with small amplitude, which expands the water outlet range of the nozzle, thereby improving the contact area of the cleaning liquid with the inside of the air preheater, and further improving the cleaning effect on the rotary air preheater;

[0025] 2. The application sets up a motor, a toothed disc and an outer gear ring, under the drive of the motor, the toothed disc rotates to drive the outer gear ring to rotate, the outer gear ring drives the air preheater to rotate under the water outlet pipe, after the air preheater rotates a circle, the cleaning liquid will wash the air preheater all around, the contact range of the cleaning liquid with the air preheater is further improved, thereby improving the cleaning effect on the rotary air preheater;

[0026] 3. The application sets up a water supplement assembly, which realizes automatic supplement of the cleaning liquid in the liquid storage tank, avoids interruption of the cleaning process due to forgetting to add cleaning liquid by the operator, and ensures smooth progress of the cleaning process. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the application.

[0028] Figure 2 is a cross-sectional view of the shell in the embodiment of the application.

[0029] Figure 3 is a cross-sectional view of the base in the embodiment of the application.

[0030] Figure 4 is a cross-sectional view of the ash shaking assembly in the embodiment of the application.

[0031] Figure 5 is a cross-sectional view of the water supplement assembly in the embodiment of the application.

[0032] Explanation of reference signs: 1, shell; 101, operation door; 102, visible window; 103, collection box; 2, liquid storage tank; 21, connecting pipe; 211, water pump; 3, water outlet pipe; 31, nozzle; 4, drive assembly; 41, gear; 42, rack; 43, electric push rod; 5, base; 51, air preheater; 511, fan-shaped compartment; 512, outer gear ring; 52, drainage groove; 6, sliding groove; 61, sliding block; 7, motor; 71, toothed disc; 8, ash shaking assembly; 81, knocking rod; 82, first spring; 83, knocking hammer; 84, magnetic block; 9, sliding groove; 10, liquid supplement tank; 11, water supplement pipe; 111, connecting ring; 12, water supplement assembly; 121, vertical rod; 122, floating ball; 123, connecting rope; 124, plugging block; 125, second spring. DETAILED DESCRIPTION

[0033] The application will be further described below with reference to the accompanying drawings. Figures 1-5 The application will be further described below with reference to the accompanying drawings.

[0034] The application discloses a rotary air preheater cleaning device.

[0035] Referring to Figure 1 A rotary air preheater cleaning device comprises a shell 1, an operating door 101 is mounted on the outer surface of the shell 1, a transparent visual window 102 is formed in the operating door 101, a liquid storage tank 2 is fixedly mounted on the outer side wall of the shell 1, the liquid storage tank 2 stores cleaning liquid for cleaning an air preheater 51, a connecting pipe 21 is mounted on the outer side wall of the liquid storage tank 2, a water pump 211 is fixedly mounted on the connecting pipe 21, one end of the connecting pipe 21 extends upward in the vertical direction and is rotatably connected with a water outlet pipe 3, in this embodiment, the connecting pipe 21 and the water outlet pipe 3 are both hard pipes, the water outlet end of the water outlet pipe 3 extends into the shell 1, and a driving assembly 4 for driving the water outlet pipe 3 to rotate is arranged on the outer wall of the shell 1.

[0036] After the operating personnel open the operating door 101, the air preheater 51 is transported into the shell 1 by a carrying device, then the water pump 211 is started, the cleaning liquid in the liquid storage tank 2 flows into the water outlet pipe 3 under the driving of the water pump 211, the dust in the air preheater 51 is cleaned under the flushing action of the cleaning liquid, and the cleaning state of the air preheater 51 inside can be observed by the operating personnel through the visual window 102.

[0037] Referring to Figure 1 and Figure 2 A base 5 is fixedly mounted in the shell 1, the air preheater 51 is rotatably connected to the base 5, a plurality of fan-shaped compartments 511 are formed in the air preheater 51, the part of the water outlet pipe 3 extending into the shell 1 is horizontally arranged, the horizontal length of the water outlet pipe 3 is greater than the radius of the air preheater 51, a plurality of spray heads 31 are equidistantly and uniformly distributed on the water outlet pipe 3, in this embodiment, the spray heads 31 are high-pressure spray heads 31, the water outlet directions of the spray heads 31 are arranged towards the surface of the air preheater 51, and in the initial state, the spray heads 31 are vertically arranged and the water outlet pipe 3 is located directly above one of the fan-shaped compartments 511.

[0038] The driving assembly 4 comprises a gear 41 fixedly mounted on the outer surface of the water outlet pipe 3, the gear 41 is rotatably arranged on the outer side wall of the shell 1, a rack 42 is meshingly arranged on the gear 41, the rack 42 is slidably connected to the outer side wall of the shell 1, an electric push rod 43 for pushing the rack 42 to move is fixedly mounted on the outer side wall of the shell 1, and the output shaft of the electric push rod 43 is fixedly connected with the rack 42.

[0039] The operator starts the electric push rod 43, the electric push rod 43 drives the rack 42 to reciprocate, and the rack 42 drives the gear 41 to rotate forward or reverse within a certain range during reciprocation, the gear 41 drives the water outlet pipe 3 to rotate, the nozzle 31 rotates slightly above the air preheater 51, thereby expanding the water outlet range of the nozzle 31, improving the contact area of the cleaning liquid with the inside of the air preheater 51, and further improving the cleaning effect on the rotary air preheater.

[0040] With reference to Figure 2 , in order to ensure that the electric push rod 43 drives the rack 42 to move more stably, the outer wall of the shell 1 is provided with a sliding groove 6, and the sliding groove 6 is slidably connected with a sliding block 61, one side of the sliding block 61 close to the rack 42 is fixedly connected with the rack 42, and when the sliding block 61 slides from the bottom of the sliding groove 6 to the top of the sliding groove 6, the drive assembly 4 drives the water outlet pipe 3 to rotate slightly;

[0041] Through the sliding cooperation between the sliding groove 6 and the sliding block 61, the sliding of the rack 42 on the shell 1 is more smooth, and the sliding groove 6 at both ends can limit the movement range of the rack 42, effectively avoiding the situation that the electric push rod 43 pushes the rack 42 out of the working range, improving the stability of the drive assembly 4, and ensuring the smooth progress of the cleaning work.

[0042] With reference to Figure 2 and Figure 3 , in order to further expand the cleaning range, the base 5 is fixedly provided with a motor 7, the output shaft of the motor 7 extends out of the base 5 and is fixedly provided with a gear disc 71, the gear disc 71 is rotatably arranged on the base 5, and the outer surface of the air preheater 51 is provided with an outer gear ring 512 connected with the inner core of the gear disc 71.

[0043] Under the drive of the motor 7, the gear disc 71 drives the outer gear ring 512 to rotate, and the outer gear ring 512 drives the air preheater 51 to rotate under the water outlet pipe 3, and after the air preheater 51 rotates one circle, the cleaning liquid will wash the air preheater 51 in all directions, the contact range of the cleaning liquid with the air preheater 51 is further improved, and the cleaning effect on the rotary air preheater is further improved.

[0044] With reference to Figure 3 and Figure 4In order to further improve the cleaning effect, the shell 1 is provided with a shaking ash assembly 8, the shaking ash assembly 8 includes a plurality of knocking rods 81 fixedly installed on the side wall of the shell 1, in the embodiment, the knocking rods 81 are two, the two knocking rods 81 are located on the opposite side walls of the shell 1 respectively, a sliding groove 9 is formed in each of the knocking rods 81, a first spring 82 is arranged in the sliding groove 9, one end of the first spring 82 is connected to the inner wall of the sliding groove 9, the other end of the first spring 82 is connected with a knocking hammer 83, the knocking hammer 83 is an iron hammer and is slidingly arranged in the sliding groove 9, a magnetic block 84 for attracting the knocking hammer 83 is arranged on the outer side wall of the air preheater 51, in the initial state, the knocking hammer 83 is located in the sliding groove 9, when the distance between the knocking hammer 83 and the magnetic block 84 is the shortest, the attraction force of the magnetic block 84 to the knocking hammer 83 is greater than the pulling force of the first spring 82 to the knocking hammer 83.

[0045] In the process of rotating the air preheater 51, the relative position between the magnetic block 84 and the knocking hammer 83 changes, when the magnetic block 84 rotates to the position where the distance between the magnetic block 84 and the knocking hammer 83 is the shortest, the knocking hammer 83 is attracted by the magnetic block 84 and hits the air preheater 51, when the distance between the magnetic block 84 and the knocking hammer 83 becomes larger, under the pulling force of the first spring 82, the knocking hammer 83 is pulled back to the sliding groove 9, through the cooperation between the first spring 82 and the magnetic block 84, the knocking hammer 83 hits the air preheater 51 at intervals, in the moment of hitting, the inside of the air preheater 51 vibrates, so that the gap between the dust adhered in the air preheater 51 and the inner side wall of the air preheater 51 becomes larger, the probability that the dust is washed away by the cleaning liquid is improved, and the cleaning effect of the rotary air preheater is further improved.

[0046] Referring to Figure 4 and Figure 5 , in order to supplement the cleaning liquid in time, a liquid supplementing tank 10 is fixedly installed on the outer side wall of the shell 1, a water supplementing pipe 11 in communication with the liquid storage tank 2 is fixedly installed on the outer side wall of the liquid supplementing tank 10, a connecting ring 111 is fixedly installed in the water supplementing pipe 11, a water supplementing assembly 12 includes a vertical rod 121 fixedly installed in the liquid storage tank 2, the vertical rod 121 is vertically arranged, a floating ball 122 is slidingly sleeved on the outer surface of the vertical rod 121, a connecting rope 123 is fixedly connected to the outer surface of the floating ball 122, one end of the connecting rope 123 is fixedly installed with a blocking block 124, the blocking block 124 is slidingly arranged in the water supplementing pipe 11, second springs 125 are arranged on the opposite sides of the connecting ring 111, one end of each of the second springs 125 is fixedly connected to the connecting ring 111, the other end of each of the second springs 125 is fixedly connected to the side of the blocking block 124 close to the connecting ring 111, in the initial state, the springs are in the natural state, the outer side wall of the blocking block 124 is attached to the inner side wall of the water supplementing pipe 11.

[0047] When the liquid tank 2 drops, the floating ball 122 vertically drops on the vertical rod 121, when dropping to a certain position, the blocking block 124 connected on the connecting rope 123 is separated from the water supplement pipe 11, the cleaning liquid in the liquid tank 10 enters the liquid tank 2, with the rising of the water level, the floating ball 122 moves upward on the vertical rod 121, when rising to a certain height, under the reset action of the second spring 125, the blocking block 124 re-blocks the water supplement pipe 11, through the water supplement assembly 12, the automatic supplement of the cleaning liquid in the liquid tank 2 is realized, the interruption of the cleaning process caused by the forgetting of the operator to add the cleaning liquid is avoided, and the smooth progress of the cleaning process is ensured.

[0048] With reference to Figure 4 and Figure 5 The base 5 is provided with a drainage groove 52 for the outflow of the cleaning liquid, and the drainage groove 52 is communicated with a collection box 103 below, and the collection box 103 is slidingly arranged in the shell 1.

[0049] With reference to Figure 1 The cleaning liquid after contacting the air preheater 51 flows into the collection box 103 under the guidance of the drainage groove 52, avoiding the accumulation of the cleaning liquid in the air preheater 51, and the operator can also concentrate on the treatment of the cleaning liquid by drawing out the collection box 103.

[0050] The implementation principle of the rotary air preheater cleaning device is as follows: when the air preheater 51 needs to be cleaned, the operator first starts the motor 7, under the driving of the motor 7, the air preheater 51 rotates under the water outlet pipe 3, then the operator starts the water pump 211 and the electric push rod 43, under the driving of the water pump 211, the cleaning liquid is sprayed from the spray head 31, the cleaning liquid washes the dust in the air preheater 51 to the collection box, and at the same time, the electric push rod 43 drives the rack 42 to reciprocate, in the process of reciprocating of the rack 42, the gear 41 is driven to rotate forward or reverse, the rotation of the gear 41 drives the water outlet pipe 3 to rotate within a certain range, so that the spray head 31 rotates slightly above the air preheater 51, the water outlet range of the spray head 31 is expanded, and through the cooperation of the motor 7 and the driving assembly 4, the air preheater 51 is completely cleaned, and the cleaning effect of the rotary air preheater is improved.

[0051] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rotary air preheater cleaning device comprising a housing (1) in which an air preheater (51) is arranged, characterized in that, The outer side wall of the shell (1) is provided with a liquid storage tank (2), the liquid storage tank (2) is provided with a connecting pipe (21), the connecting pipe (21) is provided with a water pump (211), one end of the connecting pipe (21) is provided with a water outlet pipe (3), the water outlet pipe (3) is rotatably arranged in the shell (1), a plurality of spray heads (31) are communicated on the water outlet pipe (3), the water outlet direction of the spray head (31) is arranged towards the air preheater (51), and the shell (1) is provided with a driving assembly (4) for rotating the water outlet pipe (3).

2. A rotary air preheater cleaning device according to claim 1, wherein, The driving assembly (4) comprises an electric push rod (43) arranged on the outer side wall of the shell (1), the output shaft of the electric push rod (43) is fixedly connected with a rack (42), the rack (42) is engaged with a gear (41), and the gear (41) is fixedly sleeved on the water outlet pipe (3).

3. A rotary air preheater cleaning device according to claim 2, wherein, The outer side wall of the shell (1) is provided with a sliding groove (6), and the sliding groove (6) is slidably connected with a sliding block (61), one end of the sliding block (61) is connected with the rack (42).

4. A rotary air preheater cleaning device according to claim 1, wherein The shell (1) is provided with a base (5), the air preheater (51) is rotatably connected with the base (5), the outer side wall of the air preheater (51) is sleeved with an external gear ring (512), one side of the external gear ring (512) is engaged with a toothed disc (71), the base (5) is provided with a motor (7), and the output shaft of the motor (7) is fixedly connected with the toothed disc (71).

5. A rotary air preheater cleaning device according to claim 1, wherein The shell (1) is provided with a shaking assembly (8), the shaking assembly (8) comprises a plurality of knocking rods (81) arranged on the side wall of the shell (1), a sliding groove (9) is formed in each knocking rod (81), a first spring (82) is connected to the side wall of the sliding groove (9), a knocking hammer (83) is connected to the first spring (82), the knocking hammer (83) is an iron hammer, and the outer side wall of the air preheater (51) is provided with a magnetic block (84) for adsorbing the knocking hammer (83).

6. A rotary air preheater cleaning device according to claim 1, wherein The outer side wall of the shell (1) is provided with a liquid supplementing tank (10), the liquid supplementing tank (10) is provided with a water supplementing pipe (11) communicated with the liquid storage tank (2), and the liquid storage tank (2) is provided with a water supplementing assembly (12).

7. A rotary air preheater cleaning device according to claim 6, wherein, The water supplementing assembly (12) comprises a vertical rod (121) arranged in the liquid storage tank (2), the vertical rod (121) is sleeved with a floating ball (122), the outer side wall of the floating ball (122) is provided with a connecting rope (123), one end of the connecting rope (123) is provided with a blocking block (124), the blocking block (124) is slidably connected in the water supplementing pipe (11), one end of the blocking block (124) is provided with a second spring (125), the inner side wall of the water supplementing pipe (11) is provided with a connecting ring (111), one end of the second spring (125) is connected to the connecting ring (111), and the outer side wall of the blocking block (124) is tightly attached to the inner side wall of the water supplementing pipe (11) in the natural state of the second spring (125).

8. A rotary air preheater cleaning device as defined in claim 4 wherein, The base (5) is provided with a drainage groove (52) in communication with the inside of the air preheater (51), and the drainage groove (52) is provided with a collecting box (103) in communication at the lower portion, and the collecting box (103) is slidably arranged in the inside of the shell (1).

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