Chemical dosing device for sewage treatment

Abstract

The utility model provides a dosing device for sewage treatment, which comprises a treatment component and a dosing component, the treatment component comprises a treatment tank, a stirring shaft is rotatably mounted on the treatment tank, the stirring shaft is fixedly connected with a stirring rod, a spray pipe is further fixedly mounted in a tank body of the treatment tank, a spray head is mounted on the spray pipe, and the spray head is matched with the stirring rod; the chemical feeding assembly comprises a support, an adjusting screw rod is installed on the support, the lower end of the adjusting screw rod is connected with a chemical feeding pipe, a paddle is rotatably installed in a pipe cavity of the chemical feeding pipe, a nozzle is further installed in the pipe cavity of the chemical feeding pipe and matched with the paddle, and a driving device for driving the adjusting screw rod to slide on the support is further installed on the support. The spraying pipe sprays water downwards, dissolution of chemicals is accelerated, the driving device drives the adjusting screw rod to ascend or descend, the height of the chemical feeding pipe is adjusted, chemicals are fed at different water heights, and the quality and efficiency of sewage treatment are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a dosing device for sewage treatment. Background Art

[0002] People generate a large amount of sewage in their daily production and life. In order to protect the environment, both production and domestic sewage need to be sent to sewage treatment plants for treatment before they can be discharged into the external environment.

[0003] A common sewage treatment method is to set up a sewage treatment pool in the sewage treatment plant. After the sewage is concentrated in the sewage treatment pool, the corresponding treatment agent is added to the sewage treatment pool. The treatment agent reacts with the substances in the sewage, causing the sewage to flocculate and precipitate, thereby achieving the purpose of sewage treatment. When adding treatment agents to the sewage treatment pool, a dosing device is generally used.

[0004] At present, the commonly used dosing device has a relatively simple structure, including a treatment tank for preparing liquid medicine. A spray head is provided above or inside the water body of the sewage treatment pool. The treatment tank is connected to these spray heads through pipelines. When in use, after the treatment agent is prepared in the treatment tank, the treatment agent is transported to the spray head through the pipeline. The spray head sprays the spray agent onto the surface of the water body of the sewage treatment pool or inside the water body of the sewage treatment pool to complete the dosing process. The commonly used dosing device will have the following problems during use. First, when powdered medicine is added to the treatment tank to prepare the treatment agent, the powdered medicine is relatively light and will float on the surface of the water body in the treatment tank and dissolve relatively slowly. When added, a small amount of medicine will also diffuse into the air in the treatment tank and escape from the treatment tank, resulting in waste of medicine. In addition, the spray heads in the sewage treatment pool are all fixedly installed, and the spraying depth cannot be adjusted, which is not conducive to the rapid mixing of the treatment agent and the water body of the sewage treatment pool, affecting the quality and efficiency of sewage treatment. Utility Model Content

[0005] In order to solve the above problems in the prior art, a sewage treatment dosing device is provided.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A dosing device for sewage treatment, comprising:

[0008] A processing assembly includes a processing tank, a stirring shaft rotatably mounted in the processing tank body, a plurality of stirring rods fixedly connected to the stirring shaft at intervals, a spray pipe fixedly mounted in the processing tank body, a plurality of spray heads mounted on the spray pipe, and the spray heads cooperate with the stirring rods;

[0009] A dosing assembly includes a bracket, an adjusting screw is passed through and slidably installed on the bracket, the lower end of the adjusting screw is fixedly connected to a dosing tube, a guide motor is installed in the lumen of the dosing tube, a paddle is installed at the shaft end of the guide motor, a nozzle is installed in the lumen of the dosing tube, the nozzle cooperates with the paddle, and the nozzle is connected to the treatment tank through a pipeline. A driving device is also installed on the bracket, and the driving device is used to drive the adjusting screw to slide on the bracket.

[0010] Preferably, a stirring motor is fixedly mounted on the processing tank, and one end of the stirring shaft passes through the processing tank body and is connected to the shaft end of the stirring motor.

[0011] Preferably, a feeding port is provided on the top wall of the processing tank, and the feeding port is detachably connected to a corresponding sealing cover.

[0012] Preferably, a vent valve is fixedly mounted on the top wall of the processing tank, and the vent valve is communicated with the tank body of the processing tank.

[0013] Preferably, the bottom of the treatment tank is connected to a first conduit, the first conduit is connected to a first water pump, the water inlet of the first water pump is connected to the first conduit, and the water outlet of the first water pump is connected to the spray pipe.

[0014] Preferably, a first valve for controlling the on-off of the first conduit is also installed on the first conduit.

[0015] Preferably, the bottom of the treatment tank is further connected to a second conduit, the second conduit is connected to a second water pump, the water inlet of the second water pump is connected to the second conduit, and the water outlet of the second water pump is connected to the nozzle through a pipeline.

[0016] Preferably, a second valve for controlling the on-off of the second conduit is also installed on the second conduit.

[0017] Preferably, the driving device includes support plates symmetrically arranged on both sides of the adjusting screw, the lower end of the support plate is fixedly connected to the bracket, a sliding groove is provided on the support plate, the upper end of the adjusting screw is fixedly connected to a sliding rod, the end of the sliding rod passes through the sliding groove, and the sliding rod is in sliding contact with the inner wall of the sliding groove.

[0018] Preferably, the end of the sliding rod is fixedly connected to a limiting block after passing through the sliding groove, and the width of the limiting block is greater than the width of the sliding groove.

[0019] Preferably, a rotating tube is provided on the bracket and is rotatably connected, the adjusting screw passes through the lumen of the rotating tube, the inner wall of the lumen of the rotating tube is provided with a thread adapted to the adjusting screw, the rotating tube is threadedly connected to the adjusting screw, a worm gear is coaxially fixedly sleeved on the end of the rotating tube away from the bracket, a worm gear is jointly provided on the two support plates and is rotatably connected, and the worm gear is meshedly connected to the worm gear.

[0020] Preferably, a rotating handle is installed after one end of the worm passes through one of the support plates.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. In the utility model, a stirring shaft is rotatably installed in the processing tank body, and a plurality of stirring rods are fixedly connected to the stirring shaft at intervals. A spray pipe is also fixedly installed in the processing tank body, and a plurality of spray heads are installed on the spray pipe. When the medicine is put into the processing tank to prepare the liquid medicine, the stirring shaft drives the stirring rod to rotate, and the stirring rod stirs the water body. The stirring of the water body is conducive to the dissolution of the medicine and also helps to make the concentration of the liquid medicine uniform. While the stirring rod stirs the water body, the spray pipe sprays the water body downward. When powder medicine is put in, the powder medicine is relatively light and will float on the surface of the water body, which is not easy to dissolve quickly. The water curtain generated by the spraying of the spray pipe, on the one hand, sprinkles on the surface of the powder medicine, which helps to accelerate the dissolution of the powder medicine. On the other hand, it helps to recover the medicine powder dispersed in the air in the processing tank body during the dosing into the water body, thereby avoiding the waste of medicine.

[0023] 2. In the utility model, the bottom of the treatment tank is connected to a first conduit, the first conduit is connected to a first water pump, the water inlet of the first water pump is connected to the first conduit, and the water outlet of the first water pump is connected to the spray pipe. With the cooperation of the first conduit, the first water pump draws water from the inside of the treatment tank for repeated spraying. The spraying will not introduce new water, which is conducive to ensuring the stability of the concentration of the liquid medicine.

[0024] 3. The dosing assembly of the present invention is provided with a dosing pipe, a guide motor is installed in the lumen of the dosing pipe, a paddle is installed at the shaft end of the guide motor, a nozzle is installed in the lumen of the dosing pipe, and the nozzle and the paddle cooperate with each other. When the medicine liquid is added to the sewage treatment pool, the medicine liquid in the treatment tank body is sprayed into the lumen of the dosing pipe through the nozzle, and at the same time, the guide motor drives the paddle to rotate. With the cooperation of the dosing pipe, the paddle stirs the water in the sewage treatment pool to generate a directional water flow. On the one hand, the generated water flow quickly transports the medicine liquid to the entire water body of the sewage treatment pool. On the other hand, the water flow will also stir the water body in the sewage treatment pool, accelerate the uniform mixing of the medicine liquid and the water body in the sewage treatment pool, and help improve the quality and efficiency of sewage treatment.

[0025] 4. The dosing assembly of the utility model is also provided with a driving device, which includes support plates symmetrically arranged on both sides of the adjusting screw, a slide groove is provided on the support plate, the upper end of the adjusting screw is fixedly connected to a slide rod, the end of the slide rod passes through the slide groove, and the slide rod is in sliding contact with the inner wall of the slide groove. In addition, a rotating tube is passed through and rotatably connected to the bracket, the adjusting screw passes through the lumen of the rotating tube, and the inner wall of the rotating tube lumen is provided with a thread adapted to the adjusting screw. The rotating tube is threadedly connected to the adjusting screw, and a worm gear is coaxially fixedly sleeved on one end of the rotating tube away from the bracket. A worm gear is jointly passed through and rotatably connected to the support plate, and the worm gear is meshed with the worm gear. When in use, the rotating worm gear The worm drives the worm wheel to rotate, and the rotation of the worm wheel drives the rotating tube to rotate. Under the cooperation of the threads between the rotating tube and the adjusting screw, the adjusting screw is driven to rise or fall, thereby adjusting the height of the dosing tube. In the process of rising or falling of the adjusting screw, the sliding rod and the sliding groove slide relative to each other, and the sliding rod and the sliding groove play a role of limiting, ensuring that the dosing tube can only move in the vertical direction and cannot rotate in the horizontal direction. In addition, the worm and the worm wheel have a self-locking function. When the worm stops rotating, the self-locking function of the worm and the worm wheel can automatically keep the rotating tube and the adjusting screw from rotating, thereby automatically keeping the height of the dosing tube unchanged. The design is ingenious and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 This is the main view of the overall structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the internal structure of the treatment tank of the utility model;

[0029] Figure 3 This is a side view of the internal structure of the medicine feeding tube of the utility model;

[0030] Figure 4 It is a schematic diagram of the internal structure of the driving device in the utility model.

[0031] Description of reference numerals:

[0032] 100 treatment tank; 101 stirring shaft; 102 stirring rod; 103 stirring motor; 104 feeding port; 105 ventilation valve; 110 spray pipe; 111 spray head; 112 first conduit; 113 first water pump; 114 first valve; 120 second conduit; 121 second water pump; 122 second valve; 200 bracket; 201 support plate; 202 slide; 203 rotating pipe; 204 worm gear; 205 worm; 210 adjusting screw; 211 dosing pipe; 212 guide motor; 213 paddle; 214 nozzle; 215 slide rod. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] like Figure 1-4 As shown, the utility model proposes a dosing device for sewage treatment, which includes:

[0035] The processing assembly includes a processing tank 100, a stirring shaft 101 is rotatably installed in the processing tank 100, and a plurality of stirring rods 102 are fixedly connected to the stirring shaft 101 at intervals. A spray pipe 110 is also fixedly installed in the processing tank 100, and a plurality of groups of spray heads 111 are installed on the spray pipe 110, and the spray heads 111 cooperate with the stirring rods 102;

[0036] The dosing assembly includes a bracket 200, on which an adjusting screw 210 is passed and slidably installed. The lower end of the adjusting screw 210 is fixedly connected to a dosing tube 211. A guide motor 212 is installed in the lumen of the dosing tube 211. A paddle 213 is installed at the shaft end of the guide motor 212. A nozzle 214 is installed in the lumen of the dosing tube 211. The nozzle 214 cooperates with the paddle 213. The nozzle 214 is connected to the treatment tank 100 through a pipeline. A driving device is also installed on the bracket 200, which is used to drive the adjusting screw 210 to slide on the bracket 200.

[0037] A stirring motor 103 is fixedly mounted on the processing tank 100 . One end of the stirring shaft 101 passes through the tank body of the processing tank 100 and is connected to the shaft end of the stirring motor 103 . The stirring motor 103 drives the stirring shaft 101 to rotate.

[0038] It should be noted that, in this embodiment, the spray head 111 is arranged above the stirring rod 102, the spray pipe 110 can be an annular tube, and the spray pipe 110 is coaxially arranged with the treatment tank 100. By setting the appropriate number of spray heads 111 and the spray angle, the water curtain formed by the spray head 111 can cover the entire tube cavity of the treatment tank 100. The installation of the spray pipe 110, the number of spray heads 111 and the setting of the spray angle belong to the existing technology and are not elaborated in this embodiment.

[0039] Taking the sewage treatment in the sewage treatment tank in the sewage treatment plant as an example, the method of using this device is introduced. Before use, after adjusting the direction of the dosing tube 211, fix the bracket 200 in the dosing assembly on the side wall of the sewage treatment tank, place the treatment tank 100 at a suitable position around the sewage treatment tank, and connect the treatment tank 100 with the nozzle 214 through a pipeline.

[0040] The bracket 200 plays the role of supporting and fixing the entire dosing assembly. The bracket 200 can be fixedly connected to the side wall of the sewage treatment tank in a variety of ways, including bolt connection, welding, etc., which are all existing technologies and will not be described in detail in this solution.

[0041] During use, according to the ratio of the treatment agent, an appropriate amount of solvent, such as water, is injected into the treatment tank 100, and then the medicine to be dissolved is put into the treatment tank 100, and the stirring motor 103 is started. The stirring motor 103 rotates to drive the stirring shaft 101 and the stirring rod 102 to rotate. The stirring rod 102 stirs the water in the treatment tank 100 to accelerate the dissolution of the medicine, thereby quickly forming a uniform and consistent treatment agent.

[0042] While the stirring rod 102 stirs the water, the spray pipe 110 sprays water downward. When powder medicines are added, since powder medicines are relatively light, they will float on the surface of the water after being added to the processing tank 100 and will not dissolve quickly. At the same time, a small amount of medicine will be dispersed in the air inside the processing tank 100. At this time, the water curtain generated by the spray head 111 sprays downward onto the surface of the powder medicine, which helps to quickly wet the powder medicine and accelerate the powder medicine to enter the water and dissolve. On the other hand, it also helps to recover the medicine powder dispersed in the air inside the processing tank 100 during administration back into the water, thereby avoiding waste of medicine.

[0043] After the treatment agent is prepared, the treatment agent is added to the water body of the sewage treatment pool. The treatment agent in the treatment tank 100 is sprayed into the tube cavity of the dosing pipe 211 through the nozzle 214, and the diversion motor 212 is started. The diversion motor 212 drives the paddle 213 to rotate. With the cooperation of the dosing pipe 211, the paddle 213 stirs the water body in the sewage treatment pool to generate a directional water flow. On the one hand, the generated water flow quickly transports the treatment agent to the entire water body of the sewage treatment pool. On the other hand, the water flow will also stir the water body in the sewage treatment pool, accelerate the uniform mixing of the treatment agent and the water body in the sewage treatment pool, and help improve the quality and efficiency of sewage treatment.

[0044] It should be noted that during the process of adding the treatment agent, the stirring motor 103 is always running, so as to keep the stirring rod 102 always treating the agent and ensure the uniformity of the treatment agent.

[0045] After the treatment reagents are added to the treatment tank 100 , the stirring motor 103 and the guide motor 212 are turned off.

[0046] like Figure 1 and Figure 2 As shown, in one embodiment of a sewage treatment dosing device of the present utility model,

[0047] A feeding port 104 is provided on the top wall of the processing tank 100 , and a corresponding sealing cover is detachably connected to the feeding port 104 .

[0048] A vent valve 105 is also fixedly mounted on the top wall of the processing tank 100 , and the vent valve 105 is communicated with the tank body of the processing tank 100 .

[0049] The bottom of the treatment tank 100 is connected to a first conduit 112 , which is connected to a first water pump 113 . The water inlet of the first water pump 113 is connected to the first conduit 112 , and the water outlet of the first water pump 113 is connected to the spray pipe 110 .

[0050] A first valve 114 is also installed on the first conduit 112 to control the on-off of the first conduit 112 .

[0051] The bottom of the treatment tank 100 is also connected to a second conduit 120 , which is connected to a second water pump 121 . The water inlet of the second water pump 121 is connected to the second conduit 120 , and the water outlet of the second water pump 121 is connected to the nozzle 214 through a pipeline.

[0052] A second valve 122 is also installed on the second conduit 120 for controlling the on-off of the second conduit 120 .

[0053] In this embodiment, the sealing cover and the feeding port 104 can be sealed by various methods such as snap-fitting, buckling, and threaded connection, which are all existing technologies and will not be described in detail in this solution.

[0054] One end of the first conduit 112 and the second conduit 120 in the processing tank 100 is provided with a filter screen to prevent large undissolved drug particles or solid impurities in the processing tank 100 from entering the spray head 111 and the nozzle 214 and causing blockage.

[0055] In the initial state, the first valve 114 and the second valve 122 are both in the closed state. At this time, the first conduit 112 and the second conduit 120 are both in the off state. The first valve 114 and the second valve 122 can use butterfly valves, ball valves and solenoid valves. In this embodiment, the first valve 114 and the second valve 122 use solenoid valves.

[0056] Before configuring the treatment agent, remove the sealing cover, open the feeding port 104, add the corresponding medicine and water into the treatment tank 100, reset the sealing cover, and close the feeding port 104 so that when the stirring rod 102 stirs the water, it will not splash out of the treatment tank 100.

[0057] After the feeding port 104 is closed, a sealed space is formed inside the treatment tank 100. Some drugs will generate heat when dissolving in water, and some drugs will produce gas when dissolving in water, which will cause the air pressure in the treatment tank 100 to increase. By setting the vent valve 105, excess gas can be discharged to ensure that the pressure inside and outside the treatment tank 100 is consistent, thereby ensuring the safety of the treatment reagent configuration.

[0058] When configuring the treatment agent, the first valve 114 is opened and the first conduit 112 is connected. At this time, the second valve 122 is still in the closed state. With the cooperation of the first conduit 112, the first water pump 113 extracts the water inside the treatment tank 100 for repeated spraying. The spraying will not introduce new water, which is conducive to ensuring the stability of the treatment agent concentration. Of course, the first water pump 113 repeatedly extracts the treatment agent in the treatment tank 100, which is also conducive to maintaining the uniformity of the treatment agent concentration.

[0059] When adding treatment chemicals, the first valve 114 is closed, the first conduit 112 is blocked, the second valve 122 is opened, the second conduit 120 is connected, and the second water pump 121 transports the treatment chemicals in the treatment tank 100 to the nozzle 214 and then sprays them out.

[0060] During the process of adding the treatment agent, as the water in the treatment tank 100 decreases, the air pressure in the treatment tank 100 will gradually decrease. At this time, the vent valve 105 will also open to introduce air from the external environment into the treatment tank 100, maintain the internal and external pressure balance, and ensure that the water in the treatment tank 100 flows out smoothly.

[0061] like Figures 1-4 As shown, in one embodiment of a sewage treatment dosing device of the present utility model,

[0062] The driving device includes a support plate 201 symmetrically arranged on both sides of the adjusting screw 210. The lower end of the support plate 201 is fixedly connected to the bracket 200. A slide groove 202 is provided on the support plate 201. The upper end of the adjusting screw 210 is fixedly connected to a slide rod 215. The end of the slide rod 215 passes through the slide groove 202, and the slide rod 215 is in sliding contact with the inner wall of the slide groove 202.

[0063] The end of the slide rod 215 passes through the slide groove 202 and is fixedly connected to a limit block. The width of the limit block is greater than the width of the slide groove 202. The limit block plays a limiting role to prevent the slide rod 215 from slipping out of the slide groove 202.

[0064] A rotating tube 203 is provided on the bracket 200 and is rotatably connected. The adjusting screw 210 passes through the lumen of the rotating tube 203. The inner wall of the lumen of the rotating tube 203 is provided with a thread compatible with the adjusting screw 210. The rotating tube 203 is threadedly connected to the adjusting screw 210. A worm gear 204 is coaxially fixed on the end of the rotating tube 203 away from the bracket 200. A worm 205 is jointly provided on the two support plates 201 and is rotatably connected. The worm gear 204 is meshed with the worm 205.

[0065] One end of the worm 205 passes through one of the support plates 201 and is provided with a rotating handle.

[0066] After the treatment agent is configured, when the treatment agent is added, the worm 205 is rotated, and the worm 205 drives the worm wheel 204 to rotate. The rotation of the worm wheel 204 drives the rotating tube 203 to rotate. Under the cooperation of the threads between the rotating tube 203 and the adjusting screw 210, the adjusting screw 210 is driven to rise or fall. In the process of rising or falling of the adjusting screw 210, the slide bar 215 and the slide groove 202 slide relative to each other. The slide bar 215 and the slide groove 202 play a role of limiting, ensuring that the dosing tube 211 can only move in the vertical direction and cannot rotate in the horizontal direction. By adjusting the height of the dosing tube 211, the treatment agent can be added at different water depths, so that the treatment agent can be quickly added to water bodies at different depths, which is beneficial to improving the quality and efficiency of mixing the treatment agent with the water body.

[0067] In addition, the worm 205 and the worm wheel 204 have a self-locking function. When the worm 205 stops rotating, the self-locking function of the worm 205 and the worm wheel 204 can automatically keep the rotating tube 203 and the adjusting screw 210 from rotating, thereby automatically keeping the height of the dosing tube 211 unchanged, which is beneficial to improving the stability of the dosing tube 211 during dosing, thereby improving the quality and efficiency of sewage treatment.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A dosing device for sewage treatment, characterized in that: It includes: A processing assembly, comprising a processing tank (100), wherein a stirring shaft (101) is rotatably mounted in the tank body of the processing tank (100), wherein the stirring shaft (101) is fixedly connected to a plurality of stirring rods (102) at intervals, and wherein a spray pipe (110) is fixedly mounted in the tank body of the processing tank (100), wherein a plurality of groups of spray heads (111) are mounted on the spray pipe (110), and wherein the spray heads (111) cooperate with the stirring rods (102); A dosing assembly comprises a bracket (200), an adjusting screw (210) is passed through and slidably mounted on the bracket (200), a dosing tube (211) is fixedly connected to the lower end of the adjusting screw (210), a flow guide motor (212) is mounted in the lumen of the dosing tube (211), a paddle (213) is mounted on the shaft end of the flow guide motor (212), a nozzle (214) is mounted in the lumen of the dosing tube (211), the nozzle (214) cooperates with the paddle (213), and the nozzle (214) is connected to the treatment tank (100) through a pipeline. A driving device is also mounted on the bracket (200), and the driving device is used to drive the adjusting screw (210) to slide on the bracket (200).

2. A sewage treatment dosing device according to claim 1, characterized in that: A stirring motor (103) is fixedly mounted on the processing tank (100), and one end of the stirring shaft (101) passes through the tank body of the processing tank (100) and is connected to the shaft end of the stirring motor (103).

3. A sewage treatment dosing device according to claim 1, characterized in that: A feeding port (104) is provided on the top wall of the processing tank (100), and a corresponding sealing cover is detachably connected to the feeding port (104).

4. A sewage treatment dosing device according to claim 1, characterized in that: A vent valve (105) is also fixedly mounted on the top wall of the treatment tank (100), and the vent valve (105) is communicated with the tank body of the treatment tank (100).

5. A sewage treatment dosing device according to claim 1, characterized in that: The bottom of the treatment tank (100) is connected to a first conduit (112), the first conduit (112) is connected to a first water pump (113), the water inlet of the first water pump (113) is connected to the first conduit (112), and the water outlet of the first water pump (113) is connected to the spray pipe (110).

6. A sewage treatment dosing device according to claim 5, characterized in that: The first conduit (112) is also provided with a first valve (114) for controlling the on-off of the first conduit (112).

7. A sewage treatment dosing device according to claim 1, characterized in that: The bottom of the treatment tank (100) is also connected to a second conduit (120), the second conduit (120) is connected to a second water pump (121), the water inlet of the second water pump (121) is connected to the second conduit (120), and the water outlet of the second water pump (121) is connected to the nozzle (214) through a pipeline.

8. A sewage treatment dosing device according to claim 7, characterized in that: A second valve (122) for controlling the on-off of the second conduit (120) is also installed on the second conduit (120).

9. A sewage treatment dosing device according to claim 1, characterized in that: The driving device includes a support plate (201) symmetrically arranged on both sides of the adjusting screw (210), the lower end of the support plate (201) is fixedly connected to the bracket (200), a slide groove (202) is provided on the support plate (201), the upper end of the adjusting screw (210) is fixedly connected to a slide rod (215), the end of the slide rod (215) passes through the slide groove (202), and the slide rod (215) is in sliding contact with the inner wall of the slide groove (202).

10. A sewage treatment dosing device according to claim 9, characterized in that: A rotating tube (203) is provided on the bracket (200) and is rotatably connected thereto. The adjusting screw (210) passes through the lumen of the rotating tube (203). The inner wall of the lumen of the rotating tube (203) is provided with a thread adapted to the adjusting screw (210). The rotating tube (203) is threadedly connected to the adjusting screw (210). A worm gear (204) is coaxially fixedly sleeved on one end of the rotating tube (203) away from the bracket (200). A worm gear (205) is provided on both of the support plates (201) and is rotatably connected thereto. The worm gear (204) is meshedly connected to the worm gear (205).

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