Decoloring and sterilizing all-in-one machine
By integrating air flotation and ozone treatment into a single decolorization and sterilization machine, the problems of low efficiency and high cost of ozone decolorization and sterilization are solved, achieving efficient color and bacterial inactivation while reducing equipment space occupation and operating costs.
Patent Information
- Application Number
- CN202423251340.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing technologies, ozone decolorization and sterilization are inefficient and costly, while air flotation treatment devices are not ideal, occupy a large space, and cannot effectively inactivate spore-forming bacteria, resulting in frequent replacement of bactericides and high operating costs.
Design a color removal and sterilization integrated machine. After removing suspended solids in the air flotation zone, ozone is used for sterilization. It integrates air flotation and ozone treatment functions, improves ozone utilization and reduces consumption, and adopts a sealed design to recycle the overflowing ozone.
It significantly improves the efficiency of ozone decolorization and sterilization, reduces equipment space occupation and operating costs, achieves efficient color and bacterial inactivation, and reduces ozone consumption and equipment requirements.
Smart Images
Figure CN223722891U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to papermaking industry sewage treatment equipment field especially relates to a kind of integrated equipment and its application capable of removing chromaticity in water, sterilization and disinfection. BACKGROUND
[0002] At present, for the treatment of water reuse in industrial production, the removal of chromaticity is more common to decoloring / bleaching agent;Sterilization and disinfection are more common to bactericide, ultraviolet light etc..Decoloring / bleaching agent is mostly strong oxidant product, residual in water reuse can affect product quality, cause not easy to color or chromaticity uneven.Using bactericide disinfection and sterilization, the most important disadvantage is that it cannot inactivate bacteria in spore state, the direct consequence is that bactericide needs to be frequently replaced, and the bactericidal effect is not ideal.Ultraviolet light also cannot inactivate bacteria in spore state.
[0003] Ozone has strong oxidizing property, and also has broad-spectrum bactericidal effect while decoloring.Using ozone to decolor and sterilize and disinfect is timely.But the consumption of ozone by suspended matter, COD / BOD, oil, colloidal substance etc. in water is very large, causing the efficiency of ozone decoloring and sterilization to be very low.The preparation of ozone needs high energy consumption, resulting in that the application range of ozone in industrial water treatment is limited, and in the existing treatment method, suspended matter etc. in wastewater is removed by air floatation method before ozone sterilization, but the air floatation treatment device has unsatisfactory air floatation effect, and is separately arranged with ozone treatment device, causing long wastewater treatment line, large occupied space, high cost and operation cost. UTILITARIAN CONTENT
[0004] In view of the deficiencies of the prior art, the utility model provides a decoloring and sterilization integrated machine, which can realize air floatation and ozone sterilization on wastewater in sequence, improves the efficiency of ozone decoloring and sterilization, has good water treatment effect, saves the occupied space of wastewater treatment line, and greatly reduces wastewater treatment cost.
[0005] To achieve the above purpose, the utility model takes the following technical solutions:
[0006] The utility model provides a kind of color removal sterilization integrated machine, comprising: outer cylinder, the inner cylinder is arranged in the outer cylinder, the space between the inner cylinder and outer cylinder forms air flotation zone, air flotation zone upper end is communicated with dregs collection chamber, dregs collection chamber is set on the upper end of outer cylinder, dregs collection chamber lower end is sheathed in the peripheral of outer cylinder mouth portion and is sealedly connected with outer cylinder, dregs collection chamber upper end is covered with sealing cover, dregs collection chamber is communicated with the dregs storage device outside outer cylinder by first pipeline in the inside, air flotation zone is communicated with raw water pool and micro-nano bubble generator respectively by second pipeline, the inside of inner cylinder is also communicated with the water purification collection device arranged outside outer cylinder by third pipeline, it is communicated with the liquid inlet of gas-liquid mixing pump by fourth pipeline, it is communicated with air flotation zone by eighth pipeline, the gas inlet of gas-liquid mixing pump is communicated with the fifth pipeline of ozone inlet, the outlet of gas-liquid mixing pump is communicated with the inside of inner cylinder by sixth pipeline, it is communicated with dregs collection chamber by seventh pipeline, dregs collection chamber is communicated with tail gas collection device by ninth pipeline.
[0007] Specifically, the upper end of the outer cylinder is higher than the lower end of the dregs collection chamber, the upper end of the inner cylinder is higher than the upper end of the outer cylinder, and the upper end of the dregs collection chamber is higher than the upper end of the inner cylinder.
[0008] Specifically, one end of the first pipeline connected to the dregs collection chamber is located at the lower end of the dregs collection chamber, one end of the second pipeline connected to the air flotation zone is located at the middle of the air flotation zone, one end of the eighth pipeline connected to the inner cylinder is located at the upper part of the inner cylinder, and one end of the eighth pipeline connected to the air flotation zone is located at the lower end of the air flotation zone.
[0009] Specifically, the lower end of the inner cylinder is provided with a partition plate, the partition plate is sealingly connected with the side wall of the inner cylinder, and water inlet holes are arranged on the partition plate, the area surrounded by the partition plate, the side wall of the inner cylinder and the lower wall of the inner cylinder forms a water purification collection chamber, one end of the third pipeline connected to the inner cylinder and one end of the fourth pipeline connected to the inner cylinder are both located in the water purification collection chamber, and one end of the sixth pipeline connected to the inner cylinder is located at the upper end of the partition plate.
[0010] Specifically, the upper end of the water purification chamber is provided with an ozone release chamber, one end of the sixth pipeline connected to the inner cylinder is located in the ozone release chamber, there is a gap between the side wall of the ozone release chamber and the side wall of the inner cylinder, the water inlet holes are located between the inner cylinder and the ozone release chamber, and gas outlet holes are uniformly and spacedly arranged on the top plate of the ozone release chamber.
[0011] Specifically, the eighth pipeline includes a first main pipe, one end of the first main pipe is located at the upper part of the inner cylinder, the other end is connected to a first branch pipe, and one end of the first branch pipe away from the first main pipe is located at the lower end of the air flotation zone.
[0012] Specifically, the first branch pipe is provided with a plurality of first branch pipes, and the ends of the plurality of first branch pipes away from the first main pipe are uniformly and spacedly arranged at the lower end of the air flotation zone.
[0013] Specifically, the seventh pipeline comprises a second main pipe and a plurality of second branch pipes, one end of the second main pipe is connected with the outlet of the gas-liquid mixing pump, the other end of the second main pipe is connected with the plurality of second branch pipes through the sealing cover, and the plurality of second branch pipes are arranged on the outer periphery of the upper end of the outer cylinder in uniform intervals.
[0014] Specifically, the upper end of the outer cylinder is 0.2-0.6 m higher than the lower end of the scum collecting chamber, the upper end of the inner cylinder is 0.3-0.5 m higher than the upper end of the outer cylinder, and the upper end of the scum collecting chamber is 0.3-0.5 m higher than the upper end of the inner cylinder.
[0015] The utility model discloses still propose above-mentioned decolorization sterilization integrated machine is applied to papermaking industry sewage treatment field.
[0016] Compared with the prior art, the utility model has the advantages of:
[0017] (1) the utility model provides a decolorization sterilization integrated machine, removes suspended matter and other substances in water body through a large number of tiny bubbles first, especially can classify and remove surface hydrophilic substances and surface hydrophobic substances, obtains intermediate treatment water, makes ozone even into intermediate treatment water again, utilizes the strong oxidizability of ozone dissolved in water, carries out efficient inactivation to chroma, bacteria, virus and the like in intermediate treatment water, the removal procedure of suspended matter and other substances of the utility model is high in removal rate, can significantly improve the efficiency of ozone in decolorization, sterilization and disinfection, saves the consumption of ozone;
[0018] (2) the utility model discloses a decolorization sterilization integrated machine for sealed design, and the ozone overflowed in water can be recycled, which improves the utilization rate of ozone and does not cause secondary pollution to the environment;
[0019] (3) the utility model discloses a decolorization sterilization integrated machine integrates air float treatment function and ozone treatment function, and has small space occupation, low equipment cost and low operation cost, water body enters another region in the integrated machine from one region by the natural pressure of water body, guarantees the wastewater treatment effect, reduces the setting of water pumping equipment pump, further reduces the energy consumption of water treatment line, and saves operation cost. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is the whole structure schematic diagram of the utility model integrated machine;
[0021] Figure 2 It is the overhead structure diagram of the utility model ozone releasing chamber;
[0022] 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 1201, 13, 1301, 14, 15, 16, 17, 18, 1801, 1802, 19, 1901, 1902. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0024] Embodiment 1
[0025] The embodiment provides a color-removing and sterilizing all-in-one machine, which comprises an outer cylinder body 5, an inner cylinder body 9 arranged in the outer cylinder body 5, a bottom wall of the inner cylinder body 9 is sealingly connected with a bottom wall of the outer cylinder body 5, a space between a side wall of the inner cylinder body 9 and a side wall of the outer cylinder body 5 forms a gas floating area 6, the gas floating area 6 is in communication with a scum collecting chamber 3 arranged at an upper end of the outer cylinder body 5, the scum collecting chamber 3 is sleeved on the outer periphery of the outer cylinder body 5 at a lower end thereof and is sealingly connected with the outer cylinder body 5, a sealing cover 2 is arranged at an upper end of the scum collecting chamber 3, the scum collecting chamber 3 is in communication with a scum storage device arranged outside the outer cylinder body 5 through a first pipeline 4 arranged inside the scum collecting chamber 3 and outside the outer cylinder body 5, the gas floating area 6 is in communication with a raw water pool and a micro-nano bubble generator 7 arranged outside the outer cylinder body 5 through a second pipeline 8, the inner cylinder body 9 is in communication with a clean water collecting device arranged outside the outer cylinder body 5 through a third pipeline 10 arranged inside the inner cylinder body 9, the third pipeline 10 is in communication with a liquid inlet of a gas-liquid mixing pump 16 arranged outside the outer cylinder body 5 through a fourth pipeline 14, the fourth pipeline 14 is in communication with the gas floating area 6 through an eighth pipeline 18, a gas inlet of the gas-liquid mixing pump 16 is in communication with a fifth pipeline 15 through which ozone is introduced, an outlet of the gas-liquid mixing pump 16 is in communication with the inner cylinder body 9 through a sixth pipeline 17, the sixth pipeline 17 is in communication with the scum collecting chamber 3 through a seventh pipeline 19, and the scum collecting chamber 3 is in communication with a tail gas collecting device arranged outside the outer cylinder body 5 through a ninth pipeline 1.
[0026] In the running of the integrated machine in the embodiment, the raw water is acted on by the nanometer generator before entering the air flotation area 6 through the second pipeline 8, so that numerous micro-nano bubbles are generated in the raw water. The raw water containing the micro-nano bubbles enters the air flotation area 6 through the second pipeline 8. In the air flotation area 6, the micro-nano bubbles are adsorbed on the suspended matters and the like, and drive the suspended matters and the like to go upwards. The suspended matters and the like go along with the liquid from the upper end of the air flotation area 6 into the scum collecting chamber 3 first, and then flow into the scum collecting device through the first pipeline 4. Since the suspended matters and the like in the raw water have floated up in the air flotation area 6, the water at the lower end of the air flotation area 6 does not contain the suspended matters and the like, and enters the inner cylinder 9 through the eighth pipeline 18. The liquid containing ozone enters the inner cylinder 9 through the sixth pipeline 17 to perform decoloring and sterilization on the water body. Since the water in the inner cylinder 9 goes downwards, and the ozone goes upwards in the water, the water at the lower end of the inner cylinder 9 is clean water treated by ozone. The clean water flows into the clean water collecting device through the third pipeline 10, and enters the air-oil mixing pump 16 through the fourth pipeline 14 to mix with the ozone to form the liquid containing ozone. The liquid containing ozone also enters the scum collecting chamber 3 through the seventh pipeline 19, so that the liquid in the scum collecting chamber 3 is constantly stirred, and the suspended matters and the like are guaranteed to be discharged from the first pipeline 4 along with the liquid. The ninth pipeline 1 is connected to one end of the scum collecting chamber 3, and is located at the upper end of the scum collecting chamber 3, so that the ozone overflowing from the liquid can be discharged through the ninth pipeline 1.
[0027] In order to better realize the effect of the utility model, in the above embodiment, the upper end of the outer cylinder 5 is higher than the lower end of the scum collecting chamber 3, and one end of the first pipeline 4 connected to the scum collecting chamber 3 is located at the lower end of the scum collecting chamber 3, so that the suspended matters and the like in the scum collecting chamber 3 can be removed to the maximum extent. The upper end of the inner cylinder 9 is higher than the upper end of the outer cylinder 5, so as to prevent the liquid at the upper end of the outer cylinder 5 from flowing into the inner cylinder 9 and polluting the liquid in the inner cylinder 9. In the actual running process, it is necessary to ensure that the liquid level of the scum collecting chamber 3 is between the upper end of the outer cylinder 5 and the upper end of the inner cylinder 9. One end of the second pipeline 8 connected to the air flotation area 6 is located in the middle of the air flotation area 6, so as to guarantee that the suspended matters and the like are discharged along with the micro-nano bubbles, and also guarantee that the liquid at the lower end of the air flotation area 6 contains as little suspended matters and the like as possible. The upper end of the scum collecting chamber 3 is higher than the upper end of the inner cylinder 9, and one end of the eighth pipeline 18 connected to the inner cylinder 9 is located at the upper part of the inner cylinder 9, so as to guarantee that the water entering the inner cylinder 9 goes downwards, and the ozone goes upwards in the inner cylinder 9. In this way, the water entering the inner cylinder 9 can be better affected by ozone. One end of the eighth pipeline 18 connected to the air flotation area 6 is located at the lower end of the air flotation area 6, so as to guarantee that the water entering the inner cylinder 9 is the clean water at the lower end of the air flotation area 6. One end of the third pipeline 10 connected to the inner cylinder 9 and one end of the fourth pipeline 14 connected to the inner cylinder 9 are both arranged at the lower part of the inner cylinder 9, so as to guarantee that the water discharged from the third pipeline 10 and the fourth pipeline 14 is clean water.
[0028] In the above embodiment, the eighth pipeline 18 comprises a first main pipe 1801, one end of which is located at the upper part of the inner cylinder 9, and the other end is communicated with a first branch pipe 1802, and a plurality of first branch pipes 1802 are provided, and the ends of the plurality of first branch pipes 1802 away from the first main pipe 1801 are uniformly arranged at the lower end of the air floatation zone 6, that is, a circle of first branch pipes 1802 is uniformly arranged at the lower end of the inner cylinder 9, so that the water at the lower part of the air floatation zone 6 uniformly enters the inner cylinder 9, which not only does not disturb the suspended matter and other substances that are floating up, but also ensures that the liquid entering the inner cylinder 9 does not contain suspended matter and other substances; the seventh pipeline 19 comprises a second main pipe 1901 and a second branch pipe 1902, one end of the second main pipe 1901 is connected with the outlet of the gas-liquid mixing pump 16, the other end penetrates through the sealing cover 2 and is communicated with one end of a plurality of second branch pipes 1902, respectively, and the ends of the plurality of second branch pipes 1902 away from the second main pipe 1901 are uniformly arranged at the periphery of the upper end of the outer cylinder 5, so as to ensure that the liquid in the scum collecting chamber 3 is uniformly stirred, and the local blockage of suspended matter and other substances is avoided.
[0029] In the above embodiment, the lower part of the inner cylinder 9 is provided with a partition plate 12, one end of the sixth pipeline 17 communicated with the inner cylinder 9 is located at the upper end of the clean water collecting chamber 11, the partition plate 12 is sealingly connected with the side wall of the inner cylinder 9, and the area surrounded by the partition plate 12, the side wall of the inner cylinder 9 and the lower wall of the inner cylinder 9 forms the clean water collecting chamber 11, a plurality of water inlet holes 1201 are uniformly arranged on the partition plate 12, which slow down the speed of water entering the clean water collecting chamber 11, on the one hand to prevent the ozone from being taken away before it has reacted with the water, and on the other hand to prevent the water level in the inner cylinder 9 from falling too fast, so as to ensure the pressure of the clean water in the clean water collecting chamber 11 flowing out from the third pipeline 10 and the fourth pipeline 14, and one end of the third pipeline 10 communicated with the inner cylinder 9 and one end of the fourth pipeline 14 communicated with the inner cylinder 9 are both located in the clean water collecting chamber 11.
[0030] The upper end of the clean water collecting chamber 11 is provided with an ozone releasing chamber 13, one end of the sixth pipeline 17 communicated with the inner cylinder 9 is located in the ozone releasing chamber 13, and there is a gap between the side wall of the ozone releasing chamber 13 and the side wall of the inner cylinder 9, the water inlet hole 1201 is located between the inner cylinder 9 and the ozone releasing chamber 13, and a plurality of gas outlet holes 1301 are uniformly arranged on the top plate of the ozone releasing chamber 13, the ozone bubbles entering the ozone releasing chamber 13 through the sixth pipeline 17 are uniformly released from the gas outlet holes 1301 after colliding in the ozone releasing chamber 13, which on the one hand increases the contact area between ozone and water, slows down the rising speed of ozone, and ensures the sterilization effect of ozone, and on the other hand, the gas outlet holes 1301 of the ozone releasing chamber 13 and the water inlet holes 1201 are at a certain distance, which further prevents the ozone just released from being taken away before it has reacted with the water.
[0031] In the above embodiment, the height difference between the upper end of the outer cylinder 5 and the lower end of the scum collecting chamber 3, the height difference between the upper end of the inner cylinder 9 and the upper end of the outer cylinder 5, the height difference between the upper end of the scum collecting chamber 3 and the upper end of the inner cylinder 9, and the flow rate of each pipeline can be determined according to design requirements. Preferably, the upper end of the outer cylinder 5 is 0.2-0.6 m higher than the lower end of the scum collecting chamber 3, the upper end of the inner cylinder 9 is 0.3-0.5 m higher than the upper end of the outer cylinder 5, and the upper end of the scum collecting chamber 3 is 0.3-0.5 m higher than the upper end of the inner cylinder 9.
[0032] To further improve the effect of the utility model, a filter layer can be arranged at the upper end of the water inlet hole 1201, so that the water in the inner cylinder 9 is filtered by the filter layer before entering the clean water collecting chamber 11.
[0033] The above embodiment can be applied to water treatment, which can significantly improve the ozone utilization rate and reduce the equipment cost and operation cost.
[0034] The specific embodiments of the utility model enable those skilled in the art to understand or implement the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model.
[0035] It should be understood that the utility model is not limited to the above-described content, and various modifications and changes can be made without departing from the scope thereof. The scope of the utility model is limited only by the appended claims.
Claims
1. A decolorizing and sterilizing all-in-one machine, characterized in that, The application relates to a water purifying device, which comprises the following parts: An outer cylinder (5) is internally provided with an inner cylinder (9), a space between the outer cylinder (5) and the inner cylinder (9) forms a gas floating area (6), the upper end of the gas floating area (6) is communicated with a scum collecting chamber (3), the scum collecting chamber (3) is arranged at the upper end of the outer cylinder (5), the scum collecting chamber (3) is internally communicated with a scum storage device outside the outer cylinder (5) through a first pipeline (4), the gas floating area (6) is communicated with a raw water pool and a micro-nano bubble generator (7) through a second pipeline (8), the inner cylinder (9) is further communicated with a clean water collecting device arranged outside the outer cylinder (5) through a third pipeline (10), communicated with a liquid inlet of a gas-liquid mixing pump (16) through a fourth pipeline (14), communicated with the gas floating area (6) through an eighth pipeline (18), the gas inlet of the gas-liquid mixing pump (16) is communicated with a fifth pipeline (15) for introducing ozone, and the outlet of the gas-liquid mixing pump (16) is communicated with the inner cylinder (9) through a sixth pipeline (17).
2. The decoloring and sterilizing all-in-one machine according to claim 1, characterized in that, The lower end of the scum collecting chamber (3) is sleeved on the outer periphery of the mouth of the outer cylinder (5) and is sealingly connected with the outer cylinder (5), the upper end of the outer cylinder (5) is higher than the lower end of the scum collecting chamber (3), the upper end of the inner cylinder (9) is higher than the upper end of the outer cylinder (5), and the upper end of the scum collecting chamber (3) is higher than the upper end of the inner cylinder (9).
3. The decoloring and sterilizing all-in-one machine according to claim 1, characterized in that, One end of the first pipeline (4) communicated with the scum collecting chamber (3) is located at the lower end of the scum collecting chamber (3), one end of the second pipeline (8) communicated with the gas floating area (6) is located at the middle part of the gas floating area (6), one end of the eighth pipeline (18) communicated with the inner cylinder (9) is located at the upper part of the inner cylinder (9), and one end of the eighth pipeline (18) communicated with the gas floating area (6) is located at the lower end of the gas floating area (6).
4. The decoloring and sterilizing all-in-one machine according to claim 1, characterized in that, A partition plate (12) is arranged at the lower end of the inner cylinder (9), the partition plate (12) is sealingly connected with the side wall of the inner cylinder (9) around, water inlets (1201) are arranged on the partition plate (12) at intervals, a clean water collecting chamber (11) is formed by the partition plate (12), the side wall of the inner cylinder (9) and the lower wall of the inner cylinder (9), one end of the third pipeline (10) communicated with the inner cylinder (9) and one end of the fourth pipeline (14) communicated with the inner cylinder (9) are located in the clean water collecting chamber (11), and one end of the sixth pipeline (17) communicated with the inner cylinder (9) is located at the upper end of the partition plate (12).
5. The decoloring and sterilizing all-in-one machine according to claim 4, characterized in that, An ozone releasing chamber (13) is arranged at the upper end of the clean water collecting chamber (11), one end of the sixth pipeline (17) communicated with the inner cylinder (9) is located in the ozone releasing chamber (13), there is a gap between the side wall of the ozone releasing chamber (13) and the side wall of the inner cylinder (9), the water inlets (1201) are located between the inner cylinder (9) and the ozone releasing chamber (13), and gas outlets (1301) are uniformly and intervally arranged on the top plate of the ozone releasing chamber (13).
6. The decoloring and sterilizing all-in-one machine according to claim 1, characterized in that, The eighth pipeline (18) comprises a first main pipeline (1801), one end of the first main pipeline (1801) is located at the upper part of the inner cylinder (9), the other end of the first main pipeline (1801) is communicated with a first branch pipeline (1802), and the end of the first branch pipeline (1802) away from the first main pipeline (1801) is located at the lower end of the gas floating area (6).
7. The decoloring and sterilizing all-in-one machine according to claim 6, characterized in that, The first branch pipes (1802) are arranged in multiple, and the ends of the multiple first branch pipes (1802) away from the first main pipe (1801) are uniformly and spacedly arranged at the lower end of the air floating area (6).
8. The decoloring and sterilizing all-in-one machine according to claim 2, characterized in that, The upper end of the outer cylinder (5) is 0.2-0.6 m higher than the lower end of the scum collecting chamber (3), the upper end of the inner cylinder (9) is 0.3-0.5 m higher than the upper end of the outer cylinder (5), and the upper end of the scum collecting chamber (3) is 0.3-0.5 m higher than the upper end of the inner cylinder (9).
9. The decoloring and sterilizing all-in-one machine according to claim 1, characterized in that, The upper end of the scum collecting chamber (3) is covered with a sealing cover (2), the outlet of the gas-liquid mixing pump (16) is also communicated with the scum collecting chamber (3) through a seventh pipeline (19), and the scum collecting chamber (3) is communicated with the tail gas collecting device through a ninth pipeline (1).
10. The decoloring and sterilizing all-in-one machine according to claim 1, characterized in that, The seventh pipeline (19) comprises a second main pipe (1901) and a second branch pipe (1902), one end of the second main pipe (1901) is connected with the outlet of the gas-liquid mixing pump (16), the other end penetrates through the sealing cover (2) and is respectively communicated with the multiple second branch pipes (1902), and the ends of the multiple second branch pipes (1902) away from the second main pipe (1901) are uniformly and spacedly arranged at the periphery of the upper end of the outer cylinder (5).