Dosing device for sewage treatment

Abstract

A sewage treatment dosing device comprises a dosing assembly, the dosing assembly comprises a transparent graduated tube and a three-way tube, the top of the graduated tube is connected with a conical horn mouth, the bottom of the graduated tube is connected with a transparent tube, and the transparent tube is provided with a ball valve and connected with a medicine outlet tube through a connector in the bottom of the transparent tube; the inlet end of the three-way pipe is connected with a medicine supply pipe, the medicine supply pipe is communicated into a medicine storage tank with a medicine pump, a water taking connector is arranged at one outlet end of the three-way pipe, and a flushing ball valve is arranged on a pipeline; a control ball valve is arranged on a pipeline at the other outlet end of the three-way pipe and connected with a hose through an elbow, the bottom end of the hose extends into the conical horn mouth, and the length of the hose is not smaller than 10 cm. The device is convenient for workers to observe the dosing condition on site and judge whether the dosing pump and the buried pipeline are leaked or not. Meanwhile, negative pressure of the pipeline can be effectively eradicated, chemicals and sewage in the sewage pool are prevented from flowing back to the dosing room, and safe operation of the dosing room and the sewage plant is ensured.

Description

Technical Field

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

[0002] In order to ensure that the effluent meets the standards, sewage treatment needs to add chemicals in multiple treatment links during the sewage treatment process, such as adding carbon sources to the biochemical pool, adding PAC, PAM and other flocculation agents to the coagulation sedimentation tank, adding chlorine dioxide, sodium hypochlorite disinfectants to the disinfection pool, etc. For the convenience of operation and management, the required chemicals for each sewage treatment link are generally prepared into liquid form in the dosing room of the sewage plant, and then the liquid chemicals are transported to each treatment unit through the chemical dosing pump and dosing pipe to mix with the sewage.

[0003] Normally, the dosing room of a sewage treatment plant is an independent single-story building, and the drug dissolving device, drug storage tank, dosing pump, etc. in the dosing equipment room are installed at a height close to the floor height of the sewage treatment plant. The sewage treatment structures that require the addition of chemicals in sewage treatment plants, such as biochemical pools and high-efficiency sedimentation tanks, are mostly above-ground or semi-above-ground structures, and the sewage water level in the structures is usually higher than the ground level of the dosing room and the top elevation of the drug storage tank. In addition, the water inlet of most of these structures is located at the bottom of the pool. To ensure that the chemicals and sewage are fully integrated, the dosing pipe needs to be extended into the water inlet at the bottom of the pool, or the drug needs to be added directly into the water inlet pipe. The dosing pipe is generally laid underground from the dosing room to the side of the structure, and only the stop ball valve is installed in the dosing room and at the drug addition point, and the ball valve is normally open. For this type of dosing situation in sewage treatment plants, there are the following problems and hidden dangers:

[0004] First, after the dosing pump stops working, due to the influence of the liquid level difference, it is very easy for the agent to flow back, or even for the sewage to flow back to the dosing room through the dosing pipe, destroying the agent and equipment in the dosing room. Even if the dosing pipe is installed from the top of the treatment structure to the bottom of the pool, it is easy to cause siphoning due to negative pressure, resulting in the backflow of agents and sewage.

[0005] Second, the dosing pipes used in sewage treatment plants are generally PPR pipes or ABS pipes, which are directly inserted into the bottom of the pool or connected to the water inlet pipe. Since the pipes are opaque, it is impossible to directly observe the dosage of the reagents at the dosing point. The dosage can generally only be reflected and adjusted through the operation data of the dosing pump. However, the flow rate of the reagents added by the sewage treatment plant is small, the flow rate in the dosing pipe is slow, and the viscosity of the reagents is large, which can easily clog the dosing pipe. If there is a leak in the buried section in the middle of the dosing pipe, the reagent may overflow from the leak. The amount of reagents added to the sewage structure will be reduced or even unable to be added to the structure. At this time, the dosage reflected by the dosing pump and the actual dosage will deviate, affecting the sewage treatment effect and operation data.

[0006] Third, some of the chemicals used in sewage treatment plants are highly viscous, and some will form crystals and adhere to the dosing pipes, causing the dosing pipes to be easily blocked. In order to extend the normal operation time of the dosing pipes and reduce the frequency of pipe replacement, sewage treatment plants will regularly clean the dosing pipes. In addition to clean water, acidic or alkaline solutions are also used as cleaning fluids. If the cleaning solution enters the pipe from one end of the dosing room and then flows out from the pool end, it is easy to cause abnormal sewage treatment in the structure. Utility Model Content

[0007] In view of the problems and hidden dangers of adding chemicals in the above-mentioned sewage treatment plants, the present invention provides a sewage treatment chemical adding device.

[0008] A sewage treatment dosing device is arranged on a walkway board and a railing at the top of the side of a sewage treatment tank, and is characterized in that it includes a dosing component, a drug supply pipe and a drug outlet pipe; the dosing component is installed on the walkway board, and the dosing component includes a transparent graduated tube and a tee pipe, the graduated tube has a diameter larger than the drug outlet pipe, the top of the graduated tube is connected to a conical trumpet, and the bottom is connected to a transparent tube with the same diameter as the drug outlet pipe, a ball valve is arranged on the transparent tube and is connected to the drug outlet pipe through an interface at its bottom, and the drug outlet pipe extends into a water inlet in the sewage treatment tank; the entry end of the tee pipe is connected to the drug supply pipe, and the drug supply pipe is connected to a drug storage tank with a drug pump, a water intake joint is arranged on one of the outlet ends of the tee pipe, and a flushing ball valve is arranged on the pipeline; a control ball valve is arranged on the pipeline at the other outlet end of the tee pipe, and a hose is connected through an elbow, the bottom end of the hose extends into the conical trumpet and the length of the hose is not less than 10 cm.

[0009] Furthermore, the graduated tube has a diameter of 5 cm, a height of 20-40 cm, and a capacity of 500-1000 ml.

[0010] Furthermore, the cone-shaped horn mouth has an upper diameter of 20 cm, a lower diameter of 5 cm, and a height of 15 cm.

[0011] Furthermore, the medicine outlet pipe is a stainless steel pipe.

[0012] Furthermore, the medicine supply pipe, the tee pipe and the elbow are all ABS pipes.

[0013] Furthermore, the medicine adding assembly and the medicine outlet pipe are both fixed on the railing of the walkway board.

[0014] The beneficial effects of the utility model are as follows: the transparent tube is provided with a metering scale, and the actual flow rate of the agent added to the sewage pool is calculated by timing through the closing device's lower ball valve, so as to judge the sewage treatment situation. The actual dosing flow rate can also be compared with the dosing pump's operating data to judge whether the operation of the dosing pump is normal, and whether there is leakage in the middle section of the dosing tube. The installation position of the dosing tube improvement device is higher than the sewage level in the sewage pool, which can ensure that the agent can smoothly enter the sewage inlet in the pool and be fully mixed with the sewage. There is a partition between the hose and the conical bell mouth, so that the agent and sewage will not flow back to the dosing room due to the negative pressure in the pipe, thus ensuring the safe operation of the dosing room and the sewage treatment plant. The dosing tube improvement device is equipped with a flushing ball valve and a flushing quick interface, which is convenient for flushing and maintenance of the dosing tube. It has the advantages of low cost, convenient operation and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the structure of a sewage treatment dosing device.

[0016] Figure 2 The schematic diagram is an installation diagram of a sewage treatment dosing device, a sewage treatment tank and a drug storage tank.

[0017] Among them: 1-dosing component, 2-drug outlet pipe, 3-drug supply pipe, 4-wastewater treatment pool inlet, 5-drug storage tank, 6-walkway board, 7-rail; 11-conical bell mouth, 12-scale tube, 13-ball valve, 14-interface, 15-water intake interface, 16-flushing ball valve, 17-tee pipe, 18-control ball valve, 19-elbow, 110-hose. DETAILED DESCRIPTION

[0018] Embodiment 1: A sewage treatment dosing device is arranged on the walkway board 6 and the railing 7 at the top of the side of the sewage treatment tank, and includes a dosing component 1, a drug supply pipe 3 and a drug outlet pipe 2. The dosing component 1 is installed on the walkway board 6 and fixed on the railing 7 together with the drug outlet pipe 2 for easy manual operation. The dosing component 1 includes a transparent plastic graduated tube 12 and a three-way pipe 17. The diameter of the graduated tube 12 is larger than the drug outlet pipe 2, with a diameter of 5 cm, a height of 40 cm, and a capacity of 1000 ml. The top of the graduated tube 12 is connected to a conical trumpet 11, with an upper diameter of 20 cm, a lower diameter of 5 cm, and a height of 15 cm. The bottom of the graduated tube 12 is connected to a transparent tube with the same diameter as the drug outlet tube 2. A ball valve 13 is arranged on the transparent tube and connected to the drug outlet tube 2 through the interface 14 at the bottom thereof. The drug outlet tube 2 extends into the sewage treatment pool; the entrance end of the three-way tube 17 is connected to the drug supply tube 3, which is connected to the drug storage tank with a drug pump. A water intake joint 15 is arranged on one of the outlet ends of the three-way tube 17, and a flushing ball valve 16 is arranged on the pipeline; a control ball valve 18 is arranged on the pipeline at the other outlet end of the three-way tube 17, and a hose 110 is connected through an elbow 19. The bottom end of the hose 110 extends into the conical bell mouth 11 and the length of the hose is not less than 10 cm. The drug outlet tube 2 is a stainless steel tube, and the drug supply tube 3, the three-way tube 17 and the elbow 19 are all ABS tubes.

[0019] Normal dosing: The reagents delivered from the dosing room storage tank are delivered to the dosing assembly 1 through the supply pipe 3. The flushing ball valve 16 is closed, the control ball valve 18 and the ball valve 13 are opened, and the reagents flow to the water inlet 4 of the sewage treatment pool through the conical bell mouth 11, the graduated tube 12, and the discharge pipe 2 in sequence, and are fully mixed with the sewage entering the sewage treatment pool.

[0020] Measure the actual dosage of the agent: ensure that the dosing pump in the dosing room works normally and the agent flows out normally, close the ball valve 13, and the agent begins to accumulate in the graduated tube 12. When the liquid level of the agent in the graduated tube 12 reaches "0" or a certain scale, start timing, and stop timing when it reaches the next integer scale. The difference between the two scales is the dosage. The actual dosing flow rate of the sewage pool can be calculated by dividing the dosage by the timing time, so as to judge the sewage treatment situation. The actual dosing flow rate can also be compared with the dosing pump operation data to judge whether the operation of the dosing pump is normal and whether there is leakage in the middle section of the dosing pipe.

[0021] Pipeline flushing: When flushing the pipeline from the dosing room to the sewage pool, in order to prevent the acidic or alkaline flushing solution from entering the sewage pool, close the control ball valve 18, open the flushing ball valve 16, connect the flushing pipe or tap water pipe to the water intake interface 16 for flushing, and connect the drainage hose to the interface 14 to transfer the flushing waste liquid to the waste liquid collection warehouse for further treatment. When the scale tube 12 is contaminated by the liquid after a long period of use and affects the reading, open the interface 14, remove the dosing component 1, rinse it with clean water, and install it again.

Claims

1. A sewage treatment dosing device, arranged on the walkway board and railing at the top of the side of the sewage treatment tank, characterized in that It includes a dosing component, a drug supply pipe and a drug outlet pipe; the dosing component is installed on the walkway board, and the dosing component includes a transparent graduated tube and a tee pipe. The diameter of the graduated tube is larger than that of the drug outlet pipe. The top of the graduated tube is connected to a conical trumpet, and the bottom is connected to a transparent tube with the same diameter as the drug outlet pipe. A ball valve is arranged on the transparent tube and the tube is connected to the drug outlet pipe through the interface at the bottom thereof, and the drug outlet pipe extends to the water inlet in the sewage treatment pool; the inlet end of the tee pipe is connected to the drug supply pipe, and the drug supply pipe is connected to a drug storage tank with a drug pump. A water intake joint is arranged on one of the outlet ends of the tee pipe, and a flushing ball valve is arranged on the pipeline; a control ball valve is arranged on the pipeline at the other outlet end of the tee pipe, and a hose is connected through an elbow, and the bottom end of the hose extends into the conical trumpet and the length of the hose is not less than 10 cm.

2. A sewage treatment dosing device as claimed in claim 1, characterized in that The graduated tube has a diameter of 5 cm, a height of 20-40 cm, and a capacity of 500-1000 ml.

3. A sewage treatment dosing device as claimed in claim 1, characterized in that The cone-shaped trumpet mouth has an upper diameter of 20 cm, a lower diameter of 5 cm, and a height of 15 cm.

4. A sewage treatment dosing device as claimed in claim 1, characterized in that The medicine outlet pipe is a stainless steel pipe.

5. A sewage treatment dosing device as claimed in claim 1, characterized in that The medicine supply pipe, three-way pipe and elbow are all ABS pipes.

6. A sewage treatment dosing device as claimed in claim 1, characterized in that The medicine adding assembly and the medicine discharging pipe are both fixed on the railing of the walkway board.

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