Mixed wastewater treatment device

Abstract

The utility model relates to the field of wastewater treatment devices, in particular to a mixed wastewater treatment device which comprises a treatment tank, a water inlet, a water outlet, a dredging port, a carrying table, a medicament cavity, a jacking channel pipe, a spraying ring pipe, a medicament outlet hole, an auxiliary heating bin and a stirring assembly, according to the sewage treatment device, the annular medicament cavity arranged in the treatment tank is used as a flocculant storage container, and a flocculant solution can be radially sprayed out from the interior of the treatment tank by virtue of the external booster pump and the spraying ring pipe communicated with the medicament cavity, so that the flocculant is in full contact with sewage, and the generation of precipitates in the sewage in a large range is accelerated; sewage in the treatment tank and a flocculating agent solution in the agent cavity can be synchronously heated through the arrangement of the auxiliary heating bin, the reaction rate of pollutants in the sewage and a flocculating agent is further increased, and the problems that in the existing mixed wastewater treatment process, the position of a mode of adding a flocculating and precipitating agent from outside to inside is fixed, and the operation is inconvenient are solved. The flocculation and sedimentation efficiency is low.

Description

Technical Field

[0001] The utility model relates to the field of wastewater treatment devices, in particular to a mixed wastewater treatment device. Background Art

[0002] If sewage mixed with domestic sewage and industrial sewage is not properly treated and discharged, it will have a very adverse impact on the urban water environment. The existing pretreatment of mixed sewage generally adds flocculants to the sewage to precipitate the soluble pollutants in the sewage, and then uses a filtration device to filter and remove the solid pollutants in the domestic sewage and the precipitated pollutants. However, the flocculants and other agents added in this treatment method are added from the outside of the treatment equipment to the inside. Not only is the addition point fixed, the pollutants in the treatment equipment are slow to fully contact with the flocculants, and the reaction speed is also slow, which leads to low efficiency in the filtration pretreatment of mixed sewage.

[0003] Therefore, in the existing mixed wastewater flocculation and sedimentation pretreatment procedure, since the position of the agent added from the outside to the inside is fixed, the flocculation and sedimentation efficiency is low, which is not conducive to the rapid formation of sedimentation for filtration. A dosing unit can be designed that uses radial pressure pumping from the inside of the treatment equipment. The dosing points are dispersed and uniform, ensuring full contact between the agent and the pollutants, thereby greatly improving the flocculation and sedimentation efficiency of the mixed wastewater. Utility Model Content

[0004] In order to overcome the problem that the method of adding flocculation and sedimentation agents from the outside to the inside in the existing mixed wastewater treatment process has a fixed position and low flocculation and sedimentation efficiency.

[0005] The technical scheme of the utility model is: a mixed wastewater treatment device, including a treatment tank, a water inlet, a water outlet, a dredging port, a carrier, a medicine cavity, a jacking channel pipe, a spraying ring pipe, a medicine outlet hole, an auxiliary heat bin, and a stirring component; the treatment tank is a cylindrical structure with an inner wall diameter of 100 cm, a water inlet 2 for docking a mixed sewage conveying pipe is arranged at the left end of the treatment tank 1, and a water outlet 3 for docking a sewage deep treatment device is arranged at the right end, the diameters of the water inlet 2 and the water outlet 3 are both 50 cm, a dredging port with a built-in plug is arranged at the lower end of the treatment tank, a carrier is arranged on the inner wall of the treatment tank with its own axis surrounding 210°, the carrier is a shuttle-shaped structure with a diameter of 50 cm at the left and right ends and a diameter of 90 cm in the middle, and the left and right ends of the carrier are respectively connected to the water inlet and The water outlet is butt-jointed, and the lower middle end of the platform is connected with the dredging port. The upper surface of the platform is an inclined structure with an angle of 15° with the horizontal plane. The inside of the platform is symmetrically provided with a reagent chamber which surrounds the inner wall of the treatment tank. The reagent chamber is filled with a flocculant solution. The lower end of the reagent chamber is fixedly connected with a lifting channel tube extending upward from the platform. The upper end of the lifting channel tube is fixedly connected with a spraying ring tube through a radially distributed inclined tube. The spraying ring tube passes through the top side wall of the reagent chamber. The side wall of the spraying ring tube outside the reagent chamber is provided with 10-12 drug outlet holes. A horizontally rotating spherical auxiliary heating bin is arranged in the middle of the treatment tank. The auxiliary heating bin is filled with hot water of 60-80℃, and the outer wall of the auxiliary heating bin is fixedly connected with 24-36 radially distributed stirring components.

[0006] Preferably, after the mixed sewage is input into the treatment tank through the water inlet, the external booster pump immediately pressurizes the reagent chamber, so that the flocculant solution is sprayed out from the discharge holes radially distributed on the spraying ring pipe and falls onto the sewage surface, fully contacting with a large area of ​​sewage. At the same time, the auxiliary heating chamber rotates horizontally, and the sewage is stirred by the stirring assembly on the outer wall, and the hot water inside radiates outward to conduct heat, thereby accelerating the contact reaction between the flocculant and the pollutants, and the generated precipitate gathers at the bottom of the carrier. As the amount of sewage fed in increases, the clarified sewage in the upper part is discharged through the water outlet, and the precipitate and sludge in the lower part are discharged through the dredging port.

[0007] Preferably, a front pusher is installed on the side of the treatment tank near the water inlet, and a rear pusher is installed on the side of the treatment tank near the water outlet. Both the front pusher and the rear pusher push the sewage to the middle of the treatment tank through rotating turbine blades. The turbine blades of the front pusher and the rear pusher are symmetrically designed, and the water flow is pushed in the tangential direction of the turbine blades, so that the sediment generated on the carrier is concentrated to the upper part of the dredging outlet along the flow direction of the water, which helps to clean the sediment through the dredging outlet.

[0008] Preferably, an arc-shaped filter is installed on one side of the treatment tank near the water outlet. The filter protrudes in an arc shape toward the middle side of the treatment tank. The filter is located between the rear pusher and the adjacent lifting channel pipe. The arc-shaped filter has a larger contact surface with the sewage. After the water flow thrust generated by the operation of the rear pusher acts on the filter, it will disperse around along the arc-shaped structure of the filter, thereby reducing the pressure on the filter and preventing the filter from deforming.

[0009] Preferably, a water injection pipe passing through the top wall of the treatment tank is fixedly connected to the upper end of the auxiliary heating bin, a bracket is fixedly installed on the upper end of the treatment tank, a motor whose transmission shaft is connected to the water injection pipe is installed on the upper end of the bracket, and the motor drives the auxiliary heating bin to rotate horizontally. During the rotation, the stirring assembly acts on the surrounding sewage, producing a stirring effect on the sewage, thereby accelerating the contact between the flocculant and the sewage, and adding hot water into the auxiliary heating bin through the water injection pipe. After adding, the water injection pipe can be closed with a plug, and the hot water radiates heat to the surroundings through the outer wall of the auxiliary heating bin, thereby increasing the reaction rate of the sewage and the flocculant.

[0010] Preferably, the stirring assembly is a stirring rod, which is a solid copper rod. The stirring rod is distributed in the upper, middle and lower layers of the outer wall of the auxiliary heating bin. There are 6-8 stirring rods arranged radially in the upper and lower layers, and 12-20 stirring rods arranged radially in the middle layer. The stirring rods made of solid copper rods can extend and radiate the heat carried on the outer wall of the auxiliary heating bin to the surrounding areas, and have a wider range of action. The three-layered stirring rods form different stirring effects on the middle and upper and lower parts of the sewage, and the sewage in the middle is stirred to a greater extent.

[0011] Preferably, the stirring assembly is a stirring tube, which is a copper hollow rod connected to the inside of the auxiliary heating bin. The stirring tubes are distributed in the upper, middle and lower layers of the outer wall of the auxiliary heating bin. There are 6-8 stirring tubes in the upper and lower layers, and 12-20 stirring tubes in the middle layer. Hot water can enter the stirring tube of the copper hollow rod, and the radiated heat extending outward will be more concentrated and the heat transfer efficiency will be higher. The three-layer stirring rods form different stirring effects on the middle and upper and lower parts of the sewage, and the sewage in the middle is stirred to a greater extent.

[0012] Preferably, a drug inlet port connected to the outside of the treatment tank is opened at the upper end of the spraying ring tube, and a pumping pipe of an external boosting pump is fixedly connected between the drug inlet ports. The external boosting pump pressurizes the reagent chamber through the pumping pipe, so that the flocculant solution is pushed upward from the lifting channel tube into the spraying ring tube. Under the action of continuous pressure, the flocculant solution is radially sprayed from the drug outlet hole and falls onto the sewage surface in the treatment tank. The boosting pump can also be replaced by existing products such as air compressors, vacuum pumps, compressors and other top pressure system equipment. The flocculant solution is lifted and sent out by increasing the gas pressure in the reagent chamber.

[0013] Beneficial effects of the utility model:

[0014] 1. By using the annular reagent chamber set inside the treatment tank as a storage container for the flocculant, with the help of an external booster pump and a spraying ring pipe connected to the reagent chamber, the flocculant solution can be radially sprayed from the inside of the treatment tank. Compared with the traditional method of adding flocculants at fixed points outside, the flocculant can be fully contacted with the sewage, accelerating the formation of sediments in the sewage over a large range, thereby improving the filtration efficiency. By using the setting of the auxiliary heating chamber, the sewage in the treatment tank and the flocculant solution in the reagent chamber can be heated simultaneously, further accelerating the reaction rate between the pollutants in the sewage and the flocculant;

[0015] 2. The auxiliary heating chamber uses the stirring component installed on the outer wall to heat the surrounding sewage while also stirring it, further accelerating the contact between the sewage and the flocculant solution and improving the sedimentation efficiency;

[0016] 3. By using a carrier with a shuttle-shaped cross-section, the generated sediment can be gathered above the dredging outlet. Compared with traditional horizontal tank-shaped treatment equipment, it is not easy to cause sediment residue due to dead corners of the internal structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a schematic diagram of the external three-dimensional structure of the mixed wastewater treatment device of the utility model;

[0018] Figure 2 What is shown is the external front view of the mixed wastewater treatment device of the utility model;

[0019] Figure 3 Shown is a three-dimensional structural schematic diagram of the interior of a treatment tank of a mixed wastewater treatment device according to a first embodiment of the present utility model;

[0020] Figure 4 Shown is a cross-sectional schematic diagram of the interior of a treatment tank of a mixed wastewater treatment device of the utility model in accordance with a first embodiment;

[0021] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of the second embodiment of the treatment tank of the mixed wastewater treatment device of the present invention;

[0022] Figure 6 Shown is a schematic cross-sectional view of the interior of a treatment tank of a mixed wastewater treatment device according to a second embodiment of the present invention;

[0023] Figure 7 What is shown is a schematic diagram of the three-dimensional structure of the front pusher of the mixed wastewater treatment device of the utility model;

[0024] Figure 8 What is shown is a schematic diagram of the three-dimensional structure of the rear pusher of the mixed wastewater treatment device of the present utility model.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. treatment tank; 2. water inlet; 3. water outlet; 4. dredging port; 5. carrier; 6. medicine chamber; 7. lifting channel pipe; 8. spraying ring pipe; 9. medicine outlet hole; 10. auxiliary heating chamber; 11. front pusher; 12. rear pusher; 13. filter; 14. motor; 15. stirring rod; 16. stirring tube; 17. medicine inlet port; 18. pumping pipe. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0027] See also Figure 1-6The utility model provides a mixed wastewater treatment device, including a treatment tank 1, a water inlet 2, a water outlet 3, a desilting port 4, a carrier 5, a medicine chamber 6, a lifting channel pipe 7, a spraying ring pipe 8, a medicine outlet 9, an auxiliary heat bin 10, and a stirring assembly; the treatment tank 1 is a cylindrical structure with an inner wall diameter of 100 cm, a water inlet 2 for docking a mixed sewage delivery pipe is arranged at the left end of the treatment tank 1, and a water outlet 3 for docking a sewage deep treatment device is arranged at the right end, the diameters of the water inlet 2 and the water outlet 3 are both 50 cm, a desilting port 4 with a built-in plug is arranged at the lower end of the treatment tank 1, and a carrier 5 is arranged on the inner wall of the treatment tank 1 to surround 210° with its own axis, and the carrier 5 is The shuttle-shaped structure has a diameter of 50 cm at both ends and a diameter of 90 cm in the middle. The left and right ends of the carrier 5 are connected to the water inlet 2 and the water outlet 3 respectively. The lower end of the middle of the carrier 5 is connected to the silt removal port 4. The upper surface of the carrier 5 is an inclined structure with an angle of 15° with the horizontal plane. The inside of the carrier 5 is symmetrically provided with a reagent chamber 6 surrounding the inner wall of the treatment tank 1. The reagent chamber 6 is filled with a flocculant solution. The lower end of the reagent chamber 6 is fixedly connected to a lifting channel pipe 7 extending upward from the carrier 5. The upper end of the lifting channel pipe 7 is fixedly connected to a spraying ring pipe 8 through a radially distributed inclined pipe. The spraying ring pipe 8 passes through the top side wall of the reagent chamber 6. The spraying ring pipe 8 is outside the reagent chamber 6. There are 10-12 medicine outlet holes 9 on the side wall, and a horizontally rotating spherical auxiliary heating bin 10 is arranged in the middle of the treatment tank 1. The auxiliary heating bin 10 contains hot water at 60-80°C. 24-36 radially distributed stirring components are fixedly connected to the outer wall of the auxiliary heating bin 10. After the mixed sewage is input into the treatment tank 1 through the water inlet 2, the external booster pump immediately pressurizes the reagent chamber 6, so that the flocculant solution is sprayed from the medicine outlet holes 9 radially distributed on the spraying ring pipe 8 and falls on the sewage surface, fully contacting with a large area of ​​sewage. At the same time, the auxiliary heating bin 10 rotates horizontally, and the stirring component on the outer wall is used to stir the sewage, and the hot water inside radiates heat outward. The contact reaction between the flocculant and the pollutants is accelerated, and the generated precipitates are collected at the lower part of the carrier 5. As the amount of sewage input increases, the clarified sewage at the upper part is discharged through the water outlet 3, and the precipitates and sludge at the lower part are discharged through the dredging port 4. A drug inlet port 17 connected to the outside of the treatment tank 1 is opened at the upper end of the spraying ring tube 8, and a pumping pipe 18 of an external boosting pump is fixedly connected between the drug inlet ports 17. The external boosting pump pressurizes the reagent chamber 6 through the pumping pipe 18, so that the flocculant solution is pushed upward from the lifting channel tube 7 into the spraying ring tube 8. Under the action of continuous pressure, the flocculant solution is radially sprayed from the drug outlet 9 and sprinkled onto the surface of the sewage in the treatment tank 1.

[0028] See also Figure 3-8In this embodiment, a front pusher 11 is installed on the side of the treatment tank 1 near the water inlet 2, and a rear pusher 12 is installed on the side of the treatment tank 1 near the water outlet 3. The front pusher 11 and the rear pusher 12 both push the sewage to the middle of the treatment tank 1 through rotating turbine blades. The turbine blades of the front pusher 11 and the rear pusher 12 are symmetrically designed, and the water flow is pushed in the tangential direction of the turbine blades, so that the sediment generated on the carrier 5 is concentrated to the upper part of the silt removal port 4 along the flow direction of the water flow, which is helpful to clean the sediment through the silt removal port 4. A filter screen 13 with an arc structure is installed on the side of the treatment tank 1 near the water outlet 3. The filter screen 13 is arc-shaped and protrudes toward one side of the middle of the treatment tank 1. The filter screen 13 is between the rear pusher 12 and the adjacent jacking channel pipe 7. The filter screen with an arc structure 13 has a larger contact surface with the sewage. The water thrust generated by the operation of the rear pusher 12 acts on the filter screen 13 and will be dispersed around along the arc-shaped structure surface of the filter screen 13, reducing the pressure on the filter screen 13 and preventing the filter screen 13 from deforming. The upper end of the auxiliary heating bin 10 is fixedly connected with a water injection pipe passing through the top wall of the treatment tank 1. A bracket is fixedly installed on the upper end of the treatment tank 1. A motor 14 connected to the water injection pipe and a transmission shaft is installed on the upper end of the bracket. The motor 14 drives the auxiliary heating bin 10 to rotate horizontally. During the rotation, the stirring component acts on the surrounding sewage, produces a stirring effect on the sewage, accelerates the contact between the flocculant and the sewage, and adds hot water to the auxiliary heating bin 10 through the water injection pipe. After adding, a plug can be used to close the water injection pipe. The hot water radiates heat to the surrounding through the outer wall of the auxiliary heating bin 10, thereby increasing the reaction rate of the sewage and the flocculant.

[0029] Example 1: Please refer to Figure 3-4 In this embodiment, the stirring component is a stirring rod 15, which is a solid copper rod. The stirring rod 15 is distributed in the upper, middle and lower layers of the outer wall of the auxiliary heating bin 10. There are 6-8 stirring rods 15 in the upper and lower layers, and 12-20 stirring rods 15 in the middle layer are radially arranged. The stirring rod 15 made of solid copper can extend and radiate the heat carried on the outer wall of the auxiliary heating bin 10 to the surrounding areas, and the range of action is wider. The three-layered stirring rods 15 form different stirring effects on the middle and upper and lower parts of the sewage, and the sewage in the middle is stirred to a greater extent.

[0030] Example 2: Please refer to Figure 5-6In this embodiment, the stirring component is a stirring tube 16, which is a copper hollow rod connected to the inside of the auxiliary heating bin 10. The stirring tubes 16 are distributed in the upper, middle and lower layers of the outer wall of the auxiliary heating bin 10. The stirring tubes 16 in the upper and lower layers are radially arranged with 6-8 pieces, and the stirring tubes 16 in the middle layer are radially arranged with 12-20 pieces. Hot water can enter the stirring tubes 16 of the copper hollow rod, and the radiated heat extending outward will be more concentrated, and the heat transfer efficiency will be higher. The three-layered stirring rods 15 form different stirring effects on the middle part and the upper and lower parts of the sewage, and the sewage in the middle part is stirred to a greater extent.

[0031] During operation, after the mixed sewage is input into the treatment tank 1 through the water inlet 2, the external booster pump immediately pressurizes the reagent chamber 6, so that the flocculant solution is pushed into the lifting channel pipe 7 from the reagent chamber 6, and as the pressure increases, it enters the spraying ring pipe 8, and finally sprays out from the drug outlet holes 9 radially distributed on the spraying ring pipe 8 and falls on the sewage surface;

[0032] At the same time, the motor 14 drives the auxiliary heating chamber 10 to rotate horizontally. During the rotation, the stirring component acts on the surrounding sewage, produces a stirring effect on the sewage, accelerates the contact between the flocculant and the sewage, and the hot water in the auxiliary heating chamber 10 radiates heat to the surrounding sewage and the reagent chamber 6 in the sewage through the outer wall of the auxiliary heating chamber 10 and the stirring component, heats the sewage and the flocculant solution, and further improves the reaction efficiency of the flocculant solution and the sewage;

[0033] The sediment generated in the sewage falls onto the carrier 5. Driven by the turbine blades of the front pusher 11 and the rear pusher 12, the sediment is concentrated to the upper part of the dredging outlet 4 along the flow direction of the water. As the amount of sewage input increases, the clarified sewage at the upper part is isolated by the filter 13 and finally discharged through the outlet 3. The sediment and sludge at the lower part are discharged through the dredging outlet 4 with the plug structure opened.

[0034] Through the above steps, the annular reagent chamber 6 provided inside the treatment tank 1 is used as a storage container for the flocculant. With the help of an external booster pump and a spraying ring pipe 8 connected to the reagent chamber 6, the flocculant solution can be radially sprayed from the inside of the treatment tank 1. Compared with the traditional method of adding flocculants at a fixed point externally, the flocculant can be fully contacted with the sewage, and the formation of sediment in the sewage in a large range can be accelerated, thereby improving the filtration efficiency. By utilizing the setting of the auxiliary heating chamber 10, the sewage in the treatment tank 1 and the flocculant solution in the reagent chamber 6 can be heated synchronously, further accelerating the reaction rate of the pollutants in the sewage and the flocculant, so as to solve the problem that in the existing mixed wastewater treatment process, the method of adding flocculation and precipitation agents from the outside to the inside has a fixed position and low flocculation and precipitation efficiency.

Claims

1. A mixed wastewater treatment device, comprising a treatment tank (1), a water inlet (2), a water outlet (3), and a dredging port (4); characterized in that: The treatment tank (1) also comprises a carrier (5), a reagent chamber (6), a lifting channel pipe (7), a spraying ring pipe (8), a drug outlet hole (9), an auxiliary heat chamber (10), and a stirring assembly; the treatment tank (1) is a cylindrical structure with an inner wall diameter of 100 cm; a water inlet (2) for connecting to a mixed sewage conveying pipe is arranged at the left end of the treatment tank (1); a water outlet (3) for connecting to a sewage deep treatment device is arranged at the right end; the diameters of the water inlet (2) and the water outlet (3) are both 50 cm; a dredging port (4) with a built-in plug is arranged at the lower end of the treatment tank (1); a carrier (5) is arranged on the inner wall of the treatment tank (1) so as to surround the treatment tank (1) by 210° with its own axis; the carrier (5) is a shuttle-shaped structure with a diameter of 50 cm at the left and right ends and a diameter of 90 cm in the middle; the left and right ends of the carrier (5) are respectively connected to the water inlet (2) and the water outlet (3); the middle lower end of the carrier (5) is connected to the dredging port (4) The upper surface of the carrier (5) is an inclined surface structure with an angle of 15° with the horizontal plane. A reagent chamber (6) is symmetrically arranged inside the carrier (5) and surrounds the inner wall of the treatment tank (1). The reagent chamber (6) is filled with a flocculant solution. The lower end of the reagent chamber (6) is fixedly connected to a lifting channel pipe (7) extending upward from the carrier (5). The upper end of the lifting channel pipe (7) is fixedly connected to a spraying ring pipe (8) through a radially distributed inclined pipe. The spraying ring pipe (8) passes through the top side wall of the reagent chamber (6). The spraying ring pipe (8) is provided with 10-12 drug outlet holes (9) on the side wall outside the reagent chamber (6). A spherical auxiliary heat chamber (10) that can rotate horizontally is arranged in the middle of the treatment tank (1). The auxiliary heat chamber (10) contains hot water at 60-80°C. The outer wall of the auxiliary heat chamber (10) is fixedly connected to 24-36 radially distributed stirring components.

2. A mixed wastewater treatment device according to claim 1, characterized in that: A front pusher (11) is installed on the side of the treatment tank (1) close to the water inlet (2), and a rear pusher (12) is installed on the side of the treatment tank (1) close to the water outlet (3). Both the front pusher (11) and the rear pusher (12) push the sewage to the middle of the treatment tank (1) through rotating turbine blades.

3. A mixed wastewater treatment device according to claim 2, characterized in that: A filter screen (13) with an arc structure is installed on one side of the treatment tank (1) near the water outlet (3). The filter screen (13) protrudes in an arc shape toward one side of the middle of the treatment tank (1). The filter screen (13) is located between the rear pusher (12) and the adjacent lifting channel pipe (7).

4. A mixed wastewater treatment device according to claim 1, characterized in that: The upper end of the auxiliary heating chamber (10) is fixedly connected to a water injection pipe that passes through the top wall of the processing tank (1), and a bracket is fixedly installed on the upper end of the processing tank (1). The upper end of the bracket is installed with a motor (14) whose transmission shaft is connected to the water injection pipe.

5. A mixed wastewater treatment device according to claim 1, characterized in that: The stirring assembly is a stirring rod (15), which is a solid copper rod. The stirring rod (15) is distributed in the upper, middle and lower layers of the outer wall of the auxiliary heating chamber (10). The stirring rods (15) in the upper and lower layers are arranged radially in 6-8 numbers, and the stirring rods (15) in the middle layer are arranged radially in 12-20 numbers.

6. A mixed wastewater treatment device according to claim 1, characterized in that: The stirring assembly is a stirring tube (16), which is a copper hollow rod connected to the interior of the auxiliary heating bin (10). The stirring tubes (16) are distributed in the upper, middle and lower layers of the outer wall of the auxiliary heating bin (10). The stirring tubes (16) in the upper and lower layers are radially arranged with 6 to 8 in number, and the stirring tubes (16) in the middle layer are radially arranged with 12 to 20 in number.

7. A mixed wastewater treatment device according to claim 1, characterized in that: A medicine inlet port (17) connected to the outside of the treatment tank (1) is provided at the upper end of the spraying ring pipe (8), and a pumping pipe (18) connected to an external additional pump is fixedly connected between the medicine inlet ports (17).

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