A comprehensive utilization system of waste heat in acidification kiln

Abstract

The present invention relates to the technical field of waste heat recovery, and discloses a comprehensive utilization system of waste heat in an acidification kiln, including a bottom plate, an air box, a water tank and a filter cartridge, wherein a middle partition is provided in the front-to-back direction of the air box and the water tank, and a left heat pipe and a right heat pipe are provided in the left-to-right direction of the left and right sides of the air box and the water tank respectively; the left and right sides of the water tank are respectively connected with a water outlet pipe and a water inlet pipe, and the left and right sides of the air box are distributed and connected with a circulation pipe and an air inlet pipe, and the other end of the circulation pipe is connected with the bottom end of the filter cartridge. The present invention realizes the recovery of the heat of the flue gas by passing the flue gas generated during the roasting of lithium carbonate into the air box, absorbing the heat through the heat pipe in the air box and transferring it to the water tank, and then passing the flue gas into the filter cartridge to enter the activated carbon and lime layer to achieve the filtration and desulfurization of the flue gas, thereby ensuring that the flue gas can be discharged and utilized.

Description

Technical Field

[0001] The invention relates to the technical field of waste heat recovery, and in particular to a comprehensive utilization system of waste heat in an acidification kiln. Background Art

[0002] Lithium carbonate processing requires roasting, and then cooling. Currently, there are two main solutions for recycling: 1. Arrange a recovery unit outside the rotary kiln to recover the waste heat, which has a large heat loss. 2. Directly extend it into the rotary kiln to recover the high-temperature flue gas, but the high-temperature flue gas has low cleanliness and cannot be used directly.

[0003] However, the recovered heat can be used in the acidification process and can directly enter the acidification rotary kiln and the combustion chamber. The high-temperature flue gas directly recovered from the cooling kiln has poor cleanliness and low oxygen content, which is not conducive to combustion in the combustion chamber.

[0004] The existing patent discloses a high-temperature flue gas dust removal and heat absorption device (CN104913656A), including a dust removal device, a heat absorption device and a flue, and the dust removal device and the heat absorption device are connected through the flue; the dust removal device includes a box, two filter beds, a dust collection box and a two-position three-way reversing valve, the filter bed is located inside the box, the dust collection box is located behind the filter bed, and the two-position three-way reversing valve is connected to the box through the flue; the heat absorption device includes a heat absorption tower, a circulating water tank, a high-pressure water pump, a heat exchanger, a water tower and a water pipe, and the heat absorption tower and the circulating water tank are connected to form a loop. The technology disclosed in this patent does not take into account that when the dust in the flue gas adheres to the surface in the heat absorption state, the heat absorption efficiency will be greatly reduced. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a comprehensive utilization system of waste heat in an acidification kiln, which solves the problems in the above-mentioned background technology.

[0006] To solve the above technical problems, according to one aspect of the present invention, more specifically, a system for comprehensive utilization of waste heat in an acidification kiln includes a bottom plate, an air box, a water tank, and a filter cartridge, wherein a middle partition is provided through the front-to-back direction of the air box and the water tank, and a left heat pipe and a right heat pipe are provided through the left and right sides of the air box and the water tank respectively;

[0007] The left and right sides of the water tank are respectively connected with a water outlet pipe and a water inlet pipe, and the left and right sides of the air box are distributed and connected with a circulation pipe and an air inlet pipe. The other end of the circulation pipe is connected with the bottom end of the filter cartridge; the interior of the filter cartridge is provided with a lime layer, a sand and stone layer and an activated carbon layer from top to bottom, and the top of the filter cartridge is connected with an air outlet pipe.

[0008] Furthermore, the surface of the left heat pipe is provided with a left scraper that can move up and down, and the surface of the right heat pipe is provided with a right scraper that can move up and down, and the right scraper and the left scraper move up and down alternately;

[0009] A positive threaded rod and a negative threaded rod are respectively arranged on the left and right sides of the interior of the water tank. The positive threaded rod is threadedly connected to the left scraper frame, and the negative threaded rod is threadedly connected to the right scraper frame.

[0010] Furthermore, the bottom ends of the positive threaded rods pass through the bottom of the air box and are respectively covered with a left bevel gear and a left wheel, the lower ends of the reverse threaded rods pass through the bottom of the air box and are respectively covered with a right bevel gear and a right wheel, and a first belt is provided between the left and right wheels.

[0011] Furthermore, a U-shaped frame is fixedly installed on the surface of the bottom plate and located between the left wheel and the right wheel, a swing shaft is penetrated inside the U-shaped frame, and movable bevel gears are sleeved on both left and right ends of the swing shaft;

[0012] When the swing shaft is located at the left side, the movable bevel gear on the left side is meshed and connected with the left bevel gear. When the swing shaft is located at the right side, the movable bevel gear on the right side is meshed and connected with the right bevel gear.

[0013] Furthermore, a through groove is formed in the left area of ​​the swing shaft, and a movable wheel capable of moving left and right is sleeved on the surface of the through groove, and an intermediate block is also included inside the movable wheel, and the intermediate block passes through the through groove;

[0014] A limit block is fixedly installed on the surface of the bottom plate and located on the right side of the movable rotating wheel, and the limit block limits the left and right movement range of the movable rotating wheel;

[0015] A driving motor is fixedly mounted on the surface of the bottom plate, an output shaft sleeve of the driving motor is provided with a motor wheel, and a transmission sleeve between the motor wheel and the movable rotating wheel is provided with a third belt.

[0016] Furthermore, a swinging long rod is rotatably arranged above the right area of ​​the U-shaped frame, the front end of the swinging long rod is sleeved with an outer swinging frame, the bottom inner surface of the outer swinging frame is provided with two columns, the right surface of the swinging shaft is sleeved with a swinging plate, and the two columns are clamped on one side of the swinging plate;

[0017] The outer surface of the bottom of the outer swing frame is connected with a tension spring, and the other end of the tension spring is connected to the surface of the air box just above the swing long rod.

[0018] Furthermore, a left pressure rod and a right pressure rod capable of moving up and down are respectively arranged on the left and right sides of the air box, and engaging teeth are provided on the surfaces of one side corresponding to each other of the left pressure rod and the right pressure rod, and the left pressure rod and the right pressure rod move up and down alternately;

[0019] A left gear and a right gear are respectively arranged on the left and right sides of the lower part of the air box. The left gear and the left pressing rod, and the right gear and the right pressing rod are meshed and connected through meshing teeth.

[0020] Furthermore, a gear rod is sleeved at the center of the left gear and the right gear, one end of the gear rod on the left gear is sleeved with a left turntable, one end of the gear rod on the right gear is sleeved with a right turntable, and a second belt is sleeved between the left turntable and the right turntable;

[0021] An inner end of the swinging long rod is sleeved with an inner swinging frame, and a connecting column is installed at the other end of the inner swinging frame, and the connecting column is connected to the second belt.

[0022] Furthermore, the water tank is fixedly mounted on the front surface of the bottom plate, the filter cartridge is fixedly mounted on the rear surface of the bottom plate, the water tank is fixedly mounted above the air box, and a support plate is fixedly connected between the air box and the bottom plate.

[0023] Beneficial effects:

[0024] 1. The present invention allows the flue gas generated during the calcination of lithium carbonate to be passed into an air box, and the heat is absorbed by the heat pipe in the air box and transferred to the water tank to achieve heat recovery of the flue gas. The flue gas is then passed into a filter cartridge and passed through an activated carbon and lime layer to achieve filtration and desulfurization of the flue gas, thereby ensuring that the flue gas can be discharged and utilized;

[0025] 2. The present invention drives the left scraper and the right scraper to move up and down alternately by driving a driving motor or other driving units, so that the attachments on the surfaces of the left heat pipe and the right heat pipe can be removed quickly and efficiently, thereby ensuring that the surfaces of the left heat pipe and the right heat pipe are clean, thereby ensuring the efficiency of the heat pipe in absorbing heat in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a front cross-sectional view of the air box and water tank structure of the present invention;

[0028] Figure 3 For the present invention Figure 2 A magnified image of area A;

[0029] Figure 4 is a cross-sectional view of the filter cartridge 5 of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the scraper and the heat pipe of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the driving unit in the present invention;

[0032] Figure 7 It is a structural schematic diagram of the swinging long rod and its U-shaped frame of the present invention;

[0033] Figure 8 It is a structural schematic diagram of the swing shaft of the present invention;

[0034] Fig. 9 It is a state schematic diagram of the present invention.

[0035] In the figure: 1, bottom plate; 2, air box; 3, water tank; 4, support plate; 5, filter cartridge; 6, air inlet pipe; 7, water inlet pipe; 8, water outlet pipe; 9, circulation pipe; 10, first belt; 11, left heat pipe; 12, right heat pipe; 13, middle partition; 14, positive thread rod; 15, right scraper; 16, reverse thread rod; 17, left scraper; 18, limit block; 19, movable wheel; 20, middle block; 21, left pressure rod; 22, right pressure rod; 23, inner swing frame; 24, tension spring; 25, left gear; 26, left turn Plate; 27, right gear; 28, right turntable; 29, right bevel gear; 30, left bevel gear; 31, movable bevel gear; 32, U-shaped frame; 33, outer swing frame; 34, outlet pipe; 35, lime layer; 36, sand and stone layer; 37, activated carbon layer; 38, left wheel; 39, right wheel; 40, driving motor; 41, second belt; 42, third belt; 43, motor wheel; 44, swing long rod; 45, gear rod; 46, connecting column; 47, swing shaft; 48, swing plate; 49, column; 50, through groove. DETAILED DESCRIPTION

[0036] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1: Figure 1- 9, according to one aspect of the present invention, a comprehensive utilization system of waste heat in an acidification kiln is provided, comprising a bottom plate 1, an air box 2, a water box 3 and a filter cartridge 5, wherein a middle partition 13 is provided in the front-to-back direction of the air box 2 and the water box 3, and a left heat pipe 11 and a right heat pipe 12 are provided in the left-to-right direction of the left and right sides of the air box 2 and the water box 3, respectively; a water outlet pipe 8 and a water inlet pipe 7 are connected to the left and right sides of the water box 3, respectively; a circulation pipe 9 and an air inlet pipe 6 are distributed and connected to the left and right sides of the air box 2, and the other end of the circulation pipe 9 is connected to the bottom end of the filter cartridge 5; a lime layer 35, a sandstone layer 36 and an activated carbon layer 37 are provided in the filter cartridge 5 from top to bottom, and an air outlet pipe 34 is connected to the top of the filter cartridge 5. The water tank 3 is fixedly mounted on the front side surface of the bottom plate 1, the filter cartridge 5 is fixedly mounted on the rear side surface of the bottom plate 1, the water tank 3 is fixedly mounted above the air box 2, and a support plate 4 is fixedly connected between the air box 2 and the bottom plate 1. The flue gas generated by the lithium carbonate processing and roasting is passed into the air box 2 (such as Figure 2 As shown in the figure, the heat is absorbed by the heat pipe in the air box 2 and transferred to the water tank 3 to realize the recovery of flue gas heat, and then the flue gas is passed into the filter cartridge 5 and enters the activated carbon and lime to realize the filtration and desulfurization of the flue gas. The activated carbon 37 is used to absorb the tiny particulate impurities in the flue gas (such as Figure 4 As shown), the lime layer 35 is used to desulfurize the flue gas.

[0038] Embodiment 2: In this embodiment, the surface of the left heat pipe 11 is provided with a left scraper 17 that can move up and down, and the surface of the right heat pipe 12 is provided with a right scraper 15 that can move up and down, and the right scraper 15 and the left scraper 17 move up and down alternately; the inner left and right sides of the water tank 3 are respectively provided with a positive thread rod 14 and a negative thread rod 16, the positive thread rod 14 is threadedly connected with the left scraper 17, and the negative thread rod 16 is threadedly connected with the right scraper 15. The bottom ends of the positive thread rods 14 are all penetrated to the bottom of the air box 2 and are respectively sleeved with a left bevel gear 30 and a left wheel 38, the lower ends of the negative thread rods 16 are penetrated to the bottom of the air box 2 and are respectively sleeved with a right bevel gear 29 and a right wheel 39, and the first belt 10 is provided between the left wheel 38 and the right wheel 39. A U-shaped frame 32 is fixedly installed on the surface of the bottom plate 1 and located between the left wheel 38 and the right wheel 39. A swing shaft 47 is provided inside the U-shaped frame 32. Both left and right ends of the swing shaft 47 are sleeved with movable bevel gears 31. When the swing shaft 47 is located on the left side, the movable bevel gear 31 on the left side is meshed and connected with the left bevel gear 30. When the swing shaft 47 is located on the right side, the movable bevel gear 31 on the right side is meshed and connected with the right bevel gear 29 (such as Figure 2As shown in the figure), when the positive threaded rod 14 and the reverse threaded rod 16 are all rotated clockwise, the left scraper 17 will move downwards and the right scraper 15 will move upwards. Similarly, when the positive threaded rod 14 and the reverse threaded rod 16 are all rotated counterclockwise, the left scraper 17 will move upwards and the right scraper 15 will move downwards.

[0039] In this embodiment, a through groove 50 is opened in the left area of ​​the swing shaft 47, and the surface of the through groove 50 is sleeved with a movable rotating wheel 19 that can move left and right. The interior of the movable rotating wheel 19 also includes an intermediate block 20, and the intermediate block 20 passes through the through groove 50; a limit block 18 is fixedly installed on the surface of the bottom plate 1 and located on the right side of the movable rotating wheel 19, and the limit block 18 limits the left and right movement range of the movable rotating wheel 19; a driving motor 40 is fixedly installed on the surface of the bottom plate 1, and the output shaft sleeve of the driving motor 40 is provided with a motor wheel 43, and a third belt 42 is provided on the transmission sleeve between the motor wheel 43 and the movable rotating wheel 19. A swinging rod 44 is rotatably arranged above the right area of ​​the U-shaped frame 32, and the front end of the swinging rod 44 is sleeved with an outer swinging frame 33, and the bottom inner surface of the outer swinging frame 33 is provided with two columns 49, and the right surface of the swing shaft 47 is sleeved with a swinging plate 48, and the two columns 49 are stuck on one side of the swinging plate 48; the bottom outer surface of the outer swinging frame 33 is connected to a tension spring 24, and the other end of the tension spring 24 is connected to the surface of the air box 2 just above the swinging rod 44 (such as Figure 3 As shown), through the traction of the tension spring 24, it can be ensured that the outer swing frame 33 has only two states, namely, the state of being located on the left side and the state of being located on the right side.

[0040] In this embodiment, the left and right sides of the air box 2 are respectively provided with a left pressing rod 21 and a right pressing rod 22 that can move up and down, and the left pressing rod 21 and the right pressing rod 22 are provided with meshing teeth on the corresponding side surfaces, and the left pressing rod 21 and the right pressing rod 22 move up and down alternately; the left and right sides of the lower part of the air box 2 are respectively provided with a left gear 25 and a right gear 27, and the left gear 25 and the left pressing rod 21, and the right gear 27 and the right pressing rod 22 are meshed and connected through meshing teeth. The center of the left gear 25 and the right gear 27 are both sleeved with a gear rod 45, one end of the gear rod 45 on the left gear 25 is sleeved with a left turntable 26, and one end of the gear rod 45 on the right gear 27 is sleeved with a right turntable 28, and a second belt 41 is provided between the left turntable 26 and the right turntable 28; the inner end of the swinging long rod 44 is sleeved with an inner swing frame 23, and the other end of the inner swing frame 23 is installed with a connecting column 46, and its connecting column 46 is connected to the second belt 41.

[0041] The working principle of the present invention is as follows: Lithium carbonate processing requires roasting, thereby generating a large amount of flue gas. The flue gas is input into the interior of the air box 2 (such as Figure 1 , 2As shown in the figure, the flue gas enters the surface of the left heat pipe 11 through the surface of the right heat pipe 12, and then is output from the circulation pipe 9. The heat of the flue gas will enter the inside of the water tank 2 through the left heat pipe 11 and the right heat pipe 12. In this way, the heat of the flue gas can be recovered by inputting cold water from the water inlet pipe 7 into the internal water outlet pipe 8 of the water tank 3.

[0042] Then the smoke will enter the interior of the filter cartridge 5 through the flow tube 9 (such as Figure 4 As shown in FIG. 1 , the flue gas flows from bottom to top, and passes through the activated carbon layer 37, the sand and stone layer 36 and the lime layer 35 in sequence, and then is discharged through the outlet pipe 34.

[0043] Untreated flue gas directly enters the air box 2, which can easily blacken the surface of the left heat pipe 11 and the right heat pipe 12, thereby reducing the absorption of flue gas heat by the left heat pipe 11 and the right heat pipe 12. At this time, the left scraper 17 and the right scraper 15 are needed to clean the attachments on the surface of the left heat pipe 11 and the right heat pipe 12. The specific working principle is as follows:

[0044] After the driving motor 40 is started, it drives the swing shaft 47 to rotate through the third belt 42 and the movable rotating wheel 19 (such as Figure 3 , 6 As shown in FIG. 4 ), the movable bevel gears 31 at both ends of the swing shaft 47 will rotate accordingly. Figure 6 As shown in FIG. 1 , when the left bevel gear 31 drives the left bevel gear 30 and the positive threaded rod 14 to rotate clockwise, the reverse threaded rod 16 will also rotate clockwise through the transmission of the first belt 10. Since the thread directions of the positive threaded rod 14 and the reverse threaded rod 16 are opposite (as shown in FIG. 1 ), the left bevel gear 31 drives the left bevel gear 30 and the positive threaded rod 14 to rotate clockwise. Figure 2 As shown), when the positive threaded rod 14 and the reverse threaded rod 16 rotate clockwise, the left scraper 17 will move downward and the right scraper 15 will move upward (similarly, when the positive threaded rod 14 and the reverse threaded rod 16 rotate counterclockwise, the left scraper 17 will move upward and the right scraper 15 will move downward).

[0045] The left scraper 17 that continues to move downward will eventually come into contact with the left pressing rod 21 and press the left pressing rod 21 to move downward (such as Figure 3 , 6 As shown in FIG. 1 ), the meshing teeth on the left pressing rod 21 will drive the left gear 25 to rotate clockwise. Figure 6 As shown in the figure, the right gear 27 is driven to rotate clockwise, so that the right pressing rod 22 meshing with the right gear 27 moves upward.

[0046] When the second belt 41 moves clockwise, the connecting column 46 and the inner swing frame 23 drive the swing rod 44 to rotate clockwise (such as Figure 6 ,7 As shown in the figure, the outer swing frame 33 at the other end of the swing long rod 44 deflects accordingly, and squeezes the swing plate 48 to move rightward through the two columns 49, so that the movable bevel gear 31 at the right end of the swing shaft 47 is meshed and connected with the right bevel gear 29. At this time, the reverse threaded rod 16 and the forward threaded rod 14 will both rotate counterclockwise.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A system for comprehensive utilization of waste heat in an acidification kiln, characterized in that: It comprises a bottom plate (1), an air box (2), a water box (3) and a filter cartridge (5); a middle partition plate (13) is provided through the interior of the air box (2) and the water box (3) in the front-to-back direction; a left heat pipe (11) and a right heat pipe (12) are provided through the interior of the air box (2) and the water box (3) in the left-to-right direction on the left and right sides respectively; The left and right sides of the water tank (3) are respectively connected to a water outlet pipe (8) and a water inlet pipe (7); the left and right sides of the air box (2) are distributed and connected to a circulation pipe (9) and an air inlet pipe (6); the other end of the circulation pipe (9) is connected to the bottom end of the filter cartridge (5); the inside of the filter cartridge (5) is provided with a lime layer (35), a sand and stone layer (36) and an activated carbon layer (37) from top to bottom; the top of the filter cartridge (5) is connected to an air outlet pipe (34); The surface of the left heat pipe (11) is provided with a left scraper (17) that can move up and down, and the surface of the right heat pipe (12) is provided with a right scraper (15) that can move up and down, wherein the right scraper (15) and the left scraper (17) move up and down alternately; A positive threaded rod (14) and a negative threaded rod (16) are respectively provided on the left and right sides of the interior of the water tank (3); the positive threaded rod (14) is threadedly connected to the left scraper (17), and the negative threaded rod (16) is threadedly connected to the right scraper (15); The bottom ends of the positive threaded rods (14) penetrate to the bottom of the air box (2) and are respectively sleeved with a left bevel gear (30) and a left wheel (38); the lower ends of the negative threaded rods (16) penetrate to the bottom of the air box (2) and are respectively sleeved with a right bevel gear (29) and a right wheel (39); a first belt (10) is provided in a transmission sleeve between the left wheel (38) and the right wheel (39); A U-shaped frame (32) is fixedly mounted on the surface of the bottom plate (1) and located between the left wheel (38) and the right wheel (39); a swing shaft (47) is provided through the interior of the U-shaped frame (32); and movable bevel gears (31) are sleeved on both left and right ends of the swing shaft (47); When the swing shaft (47) is in the left state, the movable bevel gear (31) on the left side thereof is meshed and connected with the left bevel gear (30); when the swing shaft (47) is in the right state, the movable bevel gear (31) on the right side thereof is meshed and connected with the right bevel gear (29).

2. The comprehensive utilization system of waste heat in an acidification kiln according to claim 1 is characterized in that: A through groove (50) is formed in the left region of the swing shaft (47), and a movable rotating wheel (19) capable of moving left and right is sleeved on the surface of the through groove (50), and an intermediate block (20) is also included inside the movable rotating wheel (19), wherein the intermediate block (20) passes through the through groove (50); A limit block (18) is fixedly mounted on the surface of the bottom plate (1) and located on the right side of the movable rotating wheel (19), wherein the limit block (18) limits the left-right movement range of the movable rotating wheel (19); A driving motor (40) is fixedly mounted on the surface of the bottom plate (1); an output shaft sleeve of the driving motor (40) is provided with a motor wheel (43); and a third belt (42) is provided on a transmission sleeve between the motor wheel (43) and the movable rotating wheel (19).

3. The comprehensive utilization system of waste heat in an acidification kiln according to claim 2 is characterized in that: A swinging long rod (44) is rotatably arranged above the right side region of the U-shaped frame (32); the front end of the swinging long rod (44) is sleeved with an outer swinging frame (33); two upright posts (49) are arranged on the inner surface of the bottom of the outer swinging frame (33); a swinging plate (48) is sleeved on the right side surface of the swinging shaft (47); and the two upright posts (49) are clamped on one side of the swinging plate (48); A tension spring (24) is connected to the outer surface of the bottom of the outer swing frame (33), and the other end of the tension spring (24) is connected to the surface of the air box (2) directly above the swing long rod (44).

4. The comprehensive utilization system of waste heat in an acidification kiln according to claim 3 is characterized in that: A left pressing rod (21) and a right pressing rod (22) capable of moving up and down are respectively provided on the left and right sides of the air box (2), and the surfaces of one side of the left pressing rod (21) and the right pressing rod (22) corresponding to each other are provided with engaging teeth, and the left pressing rod (21) and the right pressing rod (22) move up and down alternately; A left gear (25) and a right gear (27) are respectively provided on the left and right sides below the air box (2); the left gear (25) and the left pressing rod (21), and the right gear (27) and the right pressing rod (22) are all meshedly connected via meshing teeth.

5. The comprehensive utilization system of waste heat in an acidification kiln according to claim 4 is characterized in that: A gear rod (45) is sleeved at the center of the left gear (25) and the right gear (27); one end of the gear rod (45) on the left gear (25) is sleeved with a left turntable (26); one end of the gear rod (45) on the right gear (27) is sleeved with a right turntable (28); a second belt (41) is sleeved between the left turntable (26) and the right turntable (28); The inner end of the swinging long rod (44) is sleeved with an inner swinging frame (23), and the other end of the inner swinging frame (23) is installed with a connecting column (46), and the connecting column (46) is connected to the second belt (41).

6. The comprehensive utilization system of waste heat in an acidification kiln according to claim 1 is characterized in that: The water tank (3) is fixedly mounted on the front surface of the bottom plate (1), the filter cartridge (5) is fixedly mounted on the rear surface of the bottom plate (1), the water tank (3) is fixedly mounted above the air box (2), and a support plate (4) is fixedly connected between the air box (2) and the bottom plate (1).

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