Device for removing suspended matter and scum from corncob washing water and utilizing waste

Abstract

The utility model discloses a device for removing suspended matter and scum from corncob washing water and utilizing waste, which belongs to the technical field of sewage treatment and comprises a primary sedimentation tank and a secondary sedimentation tank which are separated by a partition plate, and the top end of the tank wall of the secondary sedimentation tank far away from the primary sedimentation tank is lower than or equal to the top ends of other tank walls. A stirring tank is arranged in front of the second-stage sedimentation tank in the first direction; a scraping plate is arranged on the first-stage sedimentation tank and the second-stage sedimentation tank in a sliding manner and slides along a first direction; the scraping plate can rotate between a first angle and a second angle, when the scraping plate is at the first angle, the scraping plate can scrape suspended matter scum in the first-stage sedimentation tank and the second-stage sedimentation tank into the stirring tank, and the stirring tank can stir the suspended matter scum into slurry; at the second angle, the scraper blade is not in contact with the washing water; and the stirring tank is connected with a plate-and-frame filter press. According to the utility model, the scum is cleaned by the scraper, time and labor are saved, the scum is pressed and filtered into combustible solids by the plate-and-frame filter press, the waste is utilized, and the waste treatment cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely relates to a device of corn cob washing water sedimentation tank suspended matter scum removal and waste treatment utilization. BACKGROUND

[0002] Before using corn cob to produce xylose in industry, the soil and corn cob hair chaff and other sundries in the corn cob raw material need to be removed to avoid affecting production. First, most of the sundries easy to separate are removed through a rolling sieve, and then the corn cob is washed through a washing tank. The wastewater from washing the corn cob is filtered through a curved sieve and then enters a sedimentation tank. The wastewater entering the sedimentation tank contains suspended matter scum and a small amount of silt, and the silt and suspended matter scum are further removed in the sedimentation tank, so that the wastewater can be recycled. The sedimentation tank is usually a four-pool or multi-pool, and the washing water passes through four sedimentation tanks in turn, and the suspended matter scum and silt are removed by step-by-step sedimentation.

[0003] In the prior art, the suspended matter scum is cleaned by an excavator, which is time-consuming and labor-intensive, increases the cost, carries out a large amount of water, is not conducive to the drying treatment of the suspended matter scum, and pollutes the environment;

[0004] The suspended matter scum cleaned out and the hydrophobic waste residue generated by the hydrolysis of xylose are not well utilized, resulting in waste of resources.

[0005] In view of the problems existing in the prior art, the utility model combines years of design and use experience in the relevant field to design and manufacture a device for removing suspended matter scum from corn cob washing water and utilizing waste, to overcome the above-mentioned defects. UTILITY MODEL CONTENTS

[0006] For the problems existing in the prior art, the device for removing suspended matter scum from corn cob washing water and utilizing waste provided by the utility model scrapes off the suspended matter scum in the washing water at low cost, reduces the amount of water carried, and uses the suspended matter scum and the hydrophobic waste residue generated by the hydrolysis of corn cob as biomass boiler fuel, thereby reducing the cost of waste treatment and protecting the environment.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a device for removing suspended matter scum from corn cob washing water and utilizing waste, comprising a sedimentation tank, a first-stage sedimentation tank and a second-stage sedimentation tank are arranged in the sedimentation tank, the first-stage sedimentation tank and the second-stage sedimentation tank are separated by a partition plate, a first communication pipe is horizontally arranged on the partition plate, a water inlet is arranged on the first-stage sedimentation tank, the pool wall top end of the second-stage sedimentation tank away from the first-stage sedimentation tank is lower than or equal to the top end of the other pool walls, a stirring tank is arranged in front of the second-stage sedimentation tank along a first direction, and the stirring tank is connected with a plate-and-frame filter press through a discharge pipe;

[0008] A scraper is slidably arranged on the primary and secondary settling tanks and slides in the first direction;

[0009] The scraper can rotate between a first angle and a second angle. At the first angle, the scraper can scrape the suspended matter scum in the primary and secondary settling tanks into the stirring tank, which can stir the suspended matter scum into a slurry. At the second angle, the scraper slides from the secondary settling tank into the primary settling tank without contacting the washing water.

[0010] Preferably, the top end of the partition plate and the top end of the tank wall of the secondary settling tank away from the primary settling tank are lower than the top ends of the tank walls of the primary settling tank and the top ends of the tank walls of the secondary settling tank on both sides in the first direction.

[0011] When the scraper scrapes the suspended matter scum, the lower end of the scraper is slightly lower than the top end of the partition plate and the top end of the tank wall of the secondary settling tank away from the primary settling tank.

[0012] Preferably, the top end of the tank wall of the secondary settling tank away from the primary settling tank is provided with a downwardly inclined sliding plate, the sliding plate is connected to the stirring tank away from the end of the secondary settling tank, the width of the sliding plate gradually narrows in the direction close to the stirring tank, and the sliding plate is provided with a protective plate on both sides.

[0013] Preferably, the side wall of the stirring tank is connected with a water storage tank through a water control pipe, and the water control pipe is provided with a second filter screen at the connection end of the stirring tank.

[0014] Preferably, the scraper is made of stainless steel mesh material.

[0015] Preferably, the top ends of the tank walls of the primary settling tank on both sides in the first direction and the top ends of the tank walls of the secondary settling tank on both sides in the first direction are provided with guide rails, a sliding seat is slidably connected on the guide rails, a first connecting seat is arranged on the sliding seat, a second connecting seat is arranged on the scraper, the first connecting seat and the second connecting seat are connected through a pneumatic cylinder, and the pneumatic cylinder drives the scraper to rotate between the first angle and the second angle.

[0016] Preferably, the stirring tank is connected with a waste residue tank containing hydrophobic waste residue on one side.

[0017] Preferably, the settling tank further comprises a third settling tank and a fourth settling tank, and the primary settling tank, the secondary settling tank, the third settling tank, and the fourth settling tank are arranged in a clockwise or counterclockwise direction.

[0018] The settling tank is internally provided with a second communication pipe communicating the secondary settling tank and the third settling tank, and a third communication pipe communicating the third settling tank and the fourth settling tank, and the fourth settling tank is provided with a water outlet.

[0019] Preferably, the third sedimentation tank is provided with a first filter screen, the first filter screen is arranged close to the water outlet end of the second communication pipe, and the two ends of the first filter screen are respectively in abutment with the pool wall of the third sedimentation tank.

[0020] Preferably, the water inlet is connected with a water inlet pipeline, and the water outlet is connected with a water outlet pipeline.

[0021] Valves are arranged on the water inlet pipeline, the water outlet pipeline, the first communication pipe, the second communication pipe and the third communication pipe.

[0022] The device has the advantages that:

[0023] 1. The scraper regularly cleans the suspended matter and scum in the first and second sedimentation tanks and discharges them into the stirring tank, thereby saving time and effort and not bringing out too much washing water; the stirring tank and the plate-and-frame filter are arranged, the stirring tank stirs the discharged suspended matter and scum into slurry, and the plate-and-frame filter filters the slurry into solid matter which can be used as biomass boiler fuel, thereby utilizing waste and reducing waste treatment cost.

[0024] 2. The device communicates the waste residue tank in the xylose hydrolysis process with the stirring tank, discharges the hydrophobic waste residue in the waste residue tank into the stirring tank to mix with the slurry-like suspended matter and scum, and discharges them into the plate-and-frame filter together, thereby reducing the water content of the solid matter generated by pressure filtration. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic view of a device for removing suspended matter and scum from corn cob washing water and utilizing waste.

[0026] Figure 2 It is a side view of a device for removing suspended matter and scum from corn cob washing water and utilizing waste.

[0027] Figure 3 It is a schematic view of driving the scraper to rotate.

[0028] In the drawings: 1 - sedimentation tank, 2 - first sedimentation tank, 3 - second sedimentation tank, 4 - third sedimentation tank, 5 - fourth sedimentation tank, 6 - partition plate, 7 - sliding plate, 8 - protection plate, 9 - stirring tank, 10 - centrifugal pump, 11 - plate-and-frame filter, 12 - water storage tank, 13 - water control pipe, 14 - waste residue tank, 15 - first filter screen, 16 - water inlet, 17 - water outlet, 18 - water inlet pipeline, 19 - discharge valve, 20 - water outlet pipeline, 21 - scraper, 22 - first communication pipe, 23 - second communication pipe, 24 - third communication pipe, 25 - sliding seat, 26 - guide rail, 27 - water control valve, 28 - second filter screen, 29 - discharge pipe, 30 - washing water liquid level, 31 - motor, 32 - air cylinder, 33 - first connecting seat, 34 - second connecting seat. DETAILED DESCRIPTION

[0029] For the convenience of those skilled in the art to understand, the utility model is further explained below in combination with the drawings.

[0030] As Figure 1 , Figure 2 and Figure 3 Indicated, a corncob washing water removal suspended matter scum and waste utilization device, including sedimentation tank 1, be equipped with primary sedimentation tank 2 and secondary sedimentation tank 3 in sedimentation tank 1, primary sedimentation tank 2 and secondary sedimentation tank 3 are separated by baffle 6, baffle 6 is equipped with first communication pipe 22 horizontally, primary sedimentation tank 2 is equipped with water inlet 16, the pool wall top of secondary sedimentation tank 3 far from the end of primary sedimentation tank 2 is lower than or equal to other pool wall top. Figure 1 The direction indicated by the arrow in the middle is the first direction.

[0031] Primary sedimentation tank 2 and secondary sedimentation tank 3 are equipped with a rectangular scraper 21 slidingly, scraper 21 slides along the first direction, scraper 21 is made of stainless steel mesh material. Along the first direction, secondary sedimentation tank 3 is equipped with stirring tank 9 in front, stirring tank 9 is the conventional stirring tank 9 in the field, is the existing structure, and will not be repeated here.

[0032] Scraper 21 can rotate between the first angle and the second angle, when the first angle, scraper 21 can scrape the suspended matter scum in primary sedimentation tank 2 and secondary sedimentation tank 3 into stirring tank 9, and stirring tank 9 can stir the suspended matter scum into pulp; When the second angle, scraper 21 slides from secondary sedimentation tank 3 to primary sedimentation tank 2, and does not contact with washing water. When scraper 21 scrapes the suspended matter scum, the lower end of scraper 21 is slightly lower than the top of baffle 6 and the pool wall top of secondary sedimentation tank 3 far from the end of primary sedimentation tank 2, and the angle between scraper 21 and washing water liquid level 30 is preferably 45-75 °.

[0033] Specifically, the scraper 21 slides from the first sedimentation tank 2 to the second sedimentation tank 3 at the first angle to scrape the suspended matter scum, and slides from the second sedimentation tank 3 to the first sedimentation tank 2 at the second angle. The top end of the partition plate 6 and the top end of the pool wall of the second sedimentation tank 3 away from the first sedimentation tank 2 are lower than the top end of each pool wall of the first sedimentation tank 2 and the top end of the pool wall on both sides of the second sedimentation tank 3 in the first direction, so that when the suspended matter scum and a small amount of water on the surface of the washing water are discharged into the agitator tank 9 by the scraper 21 after the liquid level 30 of the washing water in the first sedimentation tank 2 and the second sedimentation tank 3 is slightly lower than the top end of the pool wall of the second sedimentation tank 3 away from the first sedimentation tank 2, the washing water will not overflow from other pool walls. When the scraper 21 cleans the suspended matter scum, the lower end of the scraper 21 is slightly lower than the top end of the partition plate 6, the suspended matter scum in the first sedimentation tank 2 is scraped, the scraper 21 is rotated when passing through the partition plate 6 to smoothly enter the second sedimentation tank 3, and then the scraper 21 is adjusted to the first angle to clean the suspended matter scum in the second sedimentation tank 3.

[0034] As shown in Figure 2 , Figure 3 The top end of the first sedimentation tank 2 and the top end of the second sedimentation tank 3 in the first direction are provided with guide rails 26, the guide rails 26 are slidably connected with sliding seats 25, the sliding seats 25 are provided with first connecting seats 33, the scraper 21 is provided with second connecting seats 34, the first connecting seats 33 and the second connecting seats 34 are connected through air cylinders 32, the air cylinders 32 drive the scraper 21 to rotate between the first angle and the second angle, and the sedimentation tank 1 is provided with a motor 31 for driving the sliding seat 25 to slide. Specifically, one end of the air cylinder 32, i.e. the piston rod end, is hinged to the second connecting seat 34, and the other end of the air cylinder 32 is hinged to the first connecting seat 33.

[0035] The scraper 21 made of stainless steel in the utility model can reduce the water resistance when scraping the suspended matter scum. The motor 31 drives the sliding seat 25 to slide on the guide rail 26, and the sliding seat 25 drives the scraper 21 to slide in the first direction. The piston rod end of the air cylinder 32 is telescopic to drive the scraper 21 to rotate.

[0036] The side wall of the agitator tank 9 is connected with a water storage tank 12 through a water control pipe 13, the water control pipe 13 is provided with a water control valve 27, and the connection end of the water control pipe 13 and the agitator tank 9 is provided with a second filter screen 28. The agitator tank 9 is connected with a plate-and-frame filter press 11 through a discharge pipe 29, the discharge pipe 29 is provided with a discharge valve 19 and a centrifugal pump 10, and one side of the agitator tank 9 is connected with a waste residue tank 14 containing hydrophobic waste residue.

[0037] The utility model discloses a stirring tank 9 is through with washing water is discharged into the water storage tank 12, control the mass ratio of suspended matter dregs and water, thereby stir into pulp with suspended matter dregs, second filter screen 28 can avoid the suspended matter dregs in stirring tank 9 into the water storage tank 12. Centrifugal pump 10 can pump the material in stirring tank 9 into plate and frame filter press 11, and the slurry material forms solid after pressure filtration through plate and frame filter press 11, and can be used as biomass boiler fuel. The waste residue tank 14 contains the hydrophobic waste residue generated in the xylose hydrolysis process, and the hydrophobic waste residue and the slurry suspended matter dregs are mixed and pumped into the plate and frame filter press 11 together, and the hydrophobic performance of the waste residue reduces the water content in the solid material, which is more conducive to combustion. The suspended matter dregs and the hydrophobic waste residue are reasonably utilized, and the waste treatment cost is reduced. The whole process realizes mechanized operation, stable operation, convenient operation and maintenance, reduces the workload, and improves the operation efficiency.

[0038] The top end of the pool wall of the secondary sedimentation tank 3 away from the end of the primary sedimentation tank 2 is provided with a downwardly inclined sliding plate 7, the sliding plate 7 away from the end of the secondary sedimentation tank 3 is connected with the stirring tank 9, the width of the sliding plate 7 gradually narrows along the direction close to the stirring tank 9, and the sliding plate 7 is provided with a protective plate 8 on both sides.

[0039] The sliding plate 7 plays a guiding role, guides the suspended matter dregs and washing water into the stirring tank 9, and avoids the suspended matter dregs and washing water from falling to the ground from both sides of the sliding plate 7, thereby causing secondary pollution and keeping the working environment clean and sanitary.

[0040] The sedimentation tank 1 further includes a tertiary sedimentation tank 4 and a quaternary sedimentation tank 5, and the primary sedimentation tank 2, the secondary sedimentation tank 3, the tertiary sedimentation tank 4 and the quaternary sedimentation tank 5 are arranged in clockwise or counterclockwise. The sedimentation tank 1 is provided with a second communication pipe 23 communicating the secondary sedimentation tank 3 and the tertiary sedimentation tank 4, a third communication pipe 24 communicating the tertiary sedimentation tank 4 and the quaternary sedimentation tank 5, and a water outlet 17 arranged on the quaternary sedimentation tank 5. The tertiary sedimentation tank 4 is provided with a first filter screen 15, the first filter screen 15 is arranged close to the water outlet end of the second communication pipe 23, and the first filter screen 15 is in abutment with the two pool walls of the tertiary sedimentation tank 4 at both ends. The water inlet 16 is connected with a water inlet pipeline 18, and the water outlet 17 is connected with a water outlet pipeline 20. Valves are arranged on the water inlet pipeline 18, the water outlet pipeline 20, the first communication pipe 22, the second communication pipe 23 and the third communication pipe 24.

[0041] Specifically, the suspended matter dregs entering the tertiary sedimentation tank 4 are blocked by the second filter screen 28, so that the suspended matter dregs are prevented from entering the quaternary sedimentation tank 5, and the effect of purifying washing water by the sedimentation tank 1 is improved.

[0042] Specific operation process

[0043] The washing water containing suspended matter scum and a small amount of silt is introduced into the first sedimentation tank 2 through the water inlet pipe 18, and flows through the first sedimentation tank 2, the second sedimentation tank 3, the third sedimentation tank 4 and the fourth sedimentation tank 5 in sequence. The suspended matter scum enters the first sedimentation tank 2, the second sedimentation tank 3 and the third sedimentation tank 4 along with the washing water, and the suspended matter scum entering the third sedimentation tank 4 is blocked by the first filter screen 15. The silt settles to the bottom of the first sedimentation tank 1 during the flow, and the suspended matter scum floats on the surface of the washing water. The preliminarily purified washing water flows out of the water outlet 17 of the fourth sedimentation tank 5.

[0044] When the suspended matter scum in the first sedimentation tank 2 and the second sedimentation tank 3 reaches a certain thickness, the valve on the second communication pipe 23 between the second sedimentation tank 3 and the third sedimentation tank 4 is closed, and the washing water continues to be introduced into the first sedimentation tank 2 until the washing water level 30 is slightly lower than the top end of the partition plate 6 and the top end of the tank wall of the second sedimentation tank 3 away from the first sedimentation tank 2. The air cylinder 32 is started, and the piston rod end of the air cylinder 32 extends to adjust the scraper 21 to a first angle, specifically, the included angle between the scraper 21 and the washing water level 30 is 60°, and the lower end of the scraper 21 is almost flush with the water level. The motor 31 is started, and the motor 31 drives the sliding seat 25 to slide along the guide rail 26, and the sliding seat 25 drives the scraper 21 to slide in a first direction, and the scraper 21 slides from the first sedimentation tank 2 to the partition plate 6, and the suspended matter scum on the first sedimentation tank 2 is scraped off, and then the air cylinder 32 is started, and the air cylinder 32 drives the scraper 21 to rotate to a position where the lower end of the scraper 21 is higher than the top end of the partition plate 6. After the scraper 21 enters the second sedimentation tank 3 from above the partition plate 6, the air cylinder 32 drives the scraper 21 to rotate to the first angle, and then the suspended matter scum in the second sedimentation tank 3 is scraped off, and the suspended matter scum and a small amount of water enter the stirring tank 9 along the sliding plate 7. Then the piston rod end of the air cylinder 32 is retracted to adjust the scraper 21 to a second angle, specifically, the scraper 21 is parallel to the washing water level 30, and the motor 31 is reversed to drive the scraper 21 to slide into the first sedimentation tank 2.

[0045] The water control valve 27 on the water control pipe 13 is opened to discharge the excess washing water in the stirring tank 9 into the water storage tank 12, and the second filter screen 28 filters the washing water entering the water control pipe 13, and the water control valve 27 is closed, and the stirring tank 9 stirs the suspended matter scum into a slurry. Then the hydrophobic waste in the waste tank 14 is transported into the stirring tank 9 to mix with the suspended matter scum to form a material, and then the discharge valve 19 on the discharge pipe 29 is opened, and the material is transported into the plate-and-frame filter press 11 through the centrifugal pump 10 for pressure filtration, and finally the solid material with a water content of ≤54% is obtained.

[0046] It should be understood that the use of these embodiments is by way of illustration only and is not intended to limit the scope of the present application. In addition, it should also be understood that, after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all these equivalent forms also fall within the protection scope defined by the claims attached to the present application.

Claims

1. A device for removing suspended matter and scum from corncob washing water and for waste utilization, characterized in that: The invention comprises a sedimentation tank (1), wherein a primary sedimentation tank (2) and a secondary sedimentation tank (3) are provided in the sedimentation tank (1), the primary sedimentation tank (2) and the secondary sedimentation tank (3) are separated by a partition (6), a first connecting pipe (22) is horizontally provided on the partition (6), a water inlet (16) is provided on the primary sedimentation tank (2), a top end of a wall of the secondary sedimentation tank (3) away from the primary sedimentation tank (2) is lower than or equal to the top end of other walls, and a stirring tank (9) is provided in front of the secondary sedimentation tank (3) along a first direction, and the stirring tank (9) is connected to a plate and frame filter press (11) through a discharge pipe (29); A scraper (21) is slidably provided on the primary sedimentation tank (2) and the secondary sedimentation tank (3), and the scraper (21) slides along a first direction; The scraper (21) can rotate between a first angle and a second angle. At the first angle, the scraper (21) can scrape the suspended matter scum in the primary sedimentation tank (2) and the secondary sedimentation tank (3) into the stirring tank (9), and the stirring tank (9) can stir the suspended matter scum into a slurry. At the second angle, the scraper (21) slides from the secondary sedimentation tank (3) into the primary sedimentation tank (2) without contacting the washing water.

2. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 1, characterized in that: The top of the partition (6) and the top of the wall of the secondary sedimentation tank (3) away from the end of the primary sedimentation tank (2) are lower than the top of each wall of the primary sedimentation tank (2) and the top of the walls of the secondary sedimentation tank (3) on both sides along the first direction; When the scraper (21) scrapes off the suspended matter scum, the lower end of the scraper (21) is slightly lower than the top of the partition (6) and the top of the wall of the secondary sedimentation tank (3) away from the end of the primary sedimentation tank (2).

3. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 1, characterized in that: A downwardly inclined slide plate (7) is provided at the top of the wall of the secondary sedimentation tank (3) away from the primary sedimentation tank (2). The slide plate (7) is connected to the stirring tank (9) away from the secondary sedimentation tank (3). The width of the slide plate (7) gradually narrows in a direction approaching the stirring tank (9). Protective plates (8) are provided on both sides of the slide plate (7).

4. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 1, characterized in that: The mixing tank (9) is connected to a water storage tank (12) via a water control pipe (13), and a second filter screen (28) is provided at the connection end between the water control pipe (13) and the mixing tank (9).

5. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 1, characterized in that: The scraper (21) is made of stainless steel mesh material.

6. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 1, characterized in that: Guide rails (26) are provided at the top of the pool walls on both sides of the first sedimentation tank (2) and the top of the pool walls on both sides of the second sedimentation tank (3) along the first direction. A slide seat (25) is slidably connected to the guide rails (26). A first connecting seat (33) is provided on the slide seat (25). A second connecting seat (34) is provided on the scraper (21). The first connecting seat (33) and the second connecting seat (34) are connected via a cylinder (32). The cylinder (32) drives the scraper (21) to rotate between a first angle and a second angle.

7. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 1, characterized in that: One side of the stirring tank (9) is connected to a waste residue tank (14) filled with hydrophobic waste residue.

8. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 1, characterized in that: The sedimentation tank (1) further comprises a tertiary sedimentation tank (4) and a quaternary sedimentation tank (5), wherein the primary sedimentation tank (2), the secondary sedimentation tank (3), the tertiary sedimentation tank (4) and the quaternary sedimentation tank (5) are arranged in a clockwise or counterclockwise direction; A second connecting pipe (23) connecting the secondary settling tank (3) and the tertiary settling tank (4), and a third connecting pipe (24) connecting the tertiary settling tank (4) and the quaternary settling tank (5) are provided inside the settling tank (1); a water outlet (17) is provided on the quaternary settling tank (5).

9. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 8, characterized in that: The tertiary sedimentation tank (4) is provided with a first filter screen (15), which is arranged close to the water outlet end of the second connecting pipe (23), and both ends of the first filter screen (15) are respectively in contact with the wall of the tertiary sedimentation tank (4).

10. The device for removing suspended matter and scum from corncob washing water and utilizing waste according to claim 8, characterized in that: The water inlet (16) is connected to a water inlet pipe (18), and the water outlet (17) is connected to a water outlet pipe (20); Valves are provided on the water inlet pipe (18), the water outlet pipe (20), the first connecting pipe (22), the second connecting pipe (23) and the third connecting pipe (24).

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