Dosing device for sewage treatment

Abstract

The utility model discloses a sewage treatment dosing device which comprises a liquid medicine storage box, a dosing box is arranged at the left upper corner in the liquid medicine storage box, the top of the dosing box is flush with the top of the liquid medicine storage box, a dosing opening is formed in the top of a dosing box body, the bottom of the dosing box is higher than the bottom of the liquid medicine storage box, and a water outlet is formed in the position, close to the bottom, of one side of the dosing box. A water inlet is formed in one side of the liquid medicine storage box, a water outlet of the medicine dispensing box is communicated with the water inlet of the liquid medicine storage box through a connecting pipeline, a transition valve is arranged on the connecting pipeline, and stirring mechanisms are arranged in the medicine dispensing box and the liquid medicine storage box respectively. Compared with the prior art, the device has the advantages that potential safety hazards are eliminated, and the cleaning problem caused by PAC precipitation is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment devices, and particularly relates to a sewage treatment chemical dosing device. Background Technique

[0002] In modern industrial sewage treatment, polyaluminum chloride (PAC) and polyacrylamide (PAM) are widely added to improve water quality. Polyaluminum chloride (PAC) is a commonly used coagulant, which is used to coagulate suspended solids, colloids and color substances in water into larger particles for easier removal. The addition of PAC helps the impurities in water to quickly aggregate and precipitate, purifying the water quality. Polyacrylamide (PAM) is a polymer used as a flocculant, which can help aggregate tiny particles to form larger flocs. It can also improve the sedimentation speed of suspended solids in water, reduce the generation of mud or sludge, and improve the transparency of water.

[0003] The existing PAC and PAM dosing systems in sewage treatment stations mostly adopt an upper and lower two-layer structure. The upper layer is a chemical preparation and stirring tank, and the lower layer is a chemical solution storage tank. The dosing system with this structure mainly has the following two problems:

[0004] First, the upper and lower two-layer structure is relatively high, generally more than 3 meters in height, and there are certain safety hazards during chemical dosing operations or observations.

[0005] Second, there is no stirring device in the chemical solution storage tank. The solubility of PAC is greatly affected by temperature, and the optimal solubility is between 10°C and 30°C. When the temperature is lower or higher than this range, PAC precipitates in the chemical solution storage tank, bringing certain difficulties to daily maintenance. ～ When the temperature is lower or higher than this range, PAC precipitates and accumulates in the chemical solution storage tank, bringing certain difficulties to daily maintenance. Content of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a sewage treatment chemical dosing device to eliminate safety hazards and solve the cleaning problem caused by PAC precipitation.

[0007] The utility model is realized through the following technical solutions:

[0008] A sewage treatment chemical dosing device includes a chemical solution storage tank. A chemical preparation tank is provided at the upper left corner inside the chemical solution storage tank. The top of the chemical preparation tank is flush with the top of the chemical solution storage tank. A chemical dosing port is provided at the top of the chemical preparation tank body. The bottom of the chemical preparation tank is higher than the bottom of the chemical solution storage tank. A drain port is provided at a position near the bottom on one side of the chemical preparation tank. An inlet is provided on one side of the chemical solution storage tank. The drain port of the chemical preparation tank is communicated with the inlet of the chemical solution storage tank through a connecting pipe. A transition valve is provided on the connecting pipe. Stirring mechanisms are respectively provided in the chemical preparation tank and the chemical solution storage tank.

[0009] As a preferred solution of the above-mentioned chemical dosing device, a high-level liquid level switch is provided inside the dispensing tank, and a low-level liquid level switch is provided inside the chemical solution storage tank.

[0010] As a preferred solution of the above-mentioned chemical dosing device, an overflow pipe is provided at a position near the top on one side of the dispensing tank, and the overflow pipe is used to connect the inside of the dispensing tank and the inside of the chemical solution storage tank.

[0011] As a preferred solution of the above-mentioned chemical dosing device, a water inlet is provided at a position near the top on one side of the dispensing tank. The water inlet of the dispensing tank is externally connected to a water inlet pipe, and a water inlet valve is provided on the water inlet pipe.

[0012] As a preferred solution of the above-mentioned chemical dosing device, liquid level scales are respectively provided on one side of the dispensing tank and the chemical solution storage tank.

[0013] As a preferred solution of the above-mentioned chemical dosing device, a support plate is provided on the top of the chemical solution storage tank, and a pulse pump is provided on the support plate. The inlet end of the pulse pump is connected to the liquid medicine outlet at one side of the bottom of the chemical solution storage tank through a liquid medicine inlet pipe. The outlet end of the pulse pump is connected to a parallel liquid medicine delivery pipe and a liquid medicine return pipe. The end of the liquid medicine return pipe is connected to the water return port on the top of the chemical solution storage tank. A delivery valve is provided on the liquid medicine delivery pipe, and a return water valve is respectively provided on the liquid medicine return pipe.

[0014] As a preferred solution of the above-mentioned chemical dosing device, four feet are provided at the bottom of the chemical solution storage tank.

[0015] The utility model has the following advantages compared with the prior art:

[0016] A sewage treatment chemical dosing device provided by the utility model reduces the height of the whole device and eliminates potential safety hazards by arranging the dispensing tank and the chemical solution storage tank in an inner and outer inclusion form. At the same time, stirring mechanisms are arranged in both of the two tanks of the dispensing tank and the chemical solution storage tank, avoiding the cleaning problem caused by the precipitation of PAC in the chemical solution storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view of the utility model.

[0018] Figure 2 is the top view of the utility model.

[0019] Reference numerals in the drawings: 1 chemical solution storage tank; 2 feet; 3 dispensing tank; 4 partition; 5 chemical dosing port; 6 water inlet pipe; 7 water inlet valve; 8 connecting pipe; 9 transition valve; 10 overflow pipe; 11 stirring motor; 12 stirring rod; 13 paddle; 14 liquid level scale; 15 high-level liquid level switch; 16 low-level liquid level switch; 17 support plate; 18 pulse pump; 19 liquid medicine inlet pipe; 20 liquid medicine delivery pipe; 21 liquid medicine return pipe; 22 delivery valve; 23 return water valve. DETAILED DESCRIPTION OF THE INVENTION

[0020] The following is a detailed description of the embodiments of the present utility model. These embodiments are implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0021] See Figures 1 to 2 , this embodiment discloses a sewage treatment chemical dosing device, including a chemical liquid storage tank 1. Four supporting feet 2 are provided at the bottom of the chemical liquid storage tank 1 and the chemical liquid storage tank 1 is supported on the ground through the four supporting feet 2. A chemical preparation tank 3 is provided in the upper left corner inside the chemical liquid storage tank 1. The chemical preparation tank 3 is formed by partitioning a cavity inside the chemical liquid storage tank 1 through a partition plate 4. The top of the chemical preparation tank 3 is flush with the top of the chemical liquid storage tank 1. A chemical dosing port 5 is provided at the top of the chemical preparation tank 3. A water inlet is provided at a position near the top on one side of the chemical preparation tank 3. The water inlet of the chemical preparation tank 3 is externally connected to a water inlet pipe 6, and a water inlet valve 7 is provided on the water inlet pipe 6. The bottom of the chemical preparation tank 3 is higher than the bottom of the chemical liquid storage tank 1. A drain port is provided at a position near the bottom on one side of the chemical preparation tank 3. A water inlet is provided on one side of the chemical liquid storage tank 1. The drain port of the chemical preparation tank 3 is communicated with the water inlet of the chemical liquid storage tank 1 through a connecting pipe 8, and a transition valve 9 is provided on the connecting pipe 8. An overflow pipe 10 is provided at a position near the top on one side of the chemical preparation tank 3. The overflow pipe 10 is used to communicate the inside of the chemical preparation tank 3 and the inside of the chemical liquid storage tank 1. Stirring mechanisms are respectively provided inside the chemical preparation tank 3 and the chemical liquid storage tank 1. The stirring mechanism can adopt a stirring motor 11 to drive a stirring rod 12 to rotate, thereby driving the blades 13 on the stirring rod 12 to rotate, so as to realize the stirring of the liquid in the tank.

[0022] Liquid level gauges 14 are respectively provided on one side of the chemical preparation tank 3 and the chemical liquid storage tank 1, and the liquid level inside the tank can be visually observed. A high-level liquid level switch 15 is provided inside the chemical preparation tank 3, and a low-level liquid level switch 16 is provided inside the chemical liquid storage tank 1.

[0023] A support plate 17 is provided at the top of the chemical liquid storage tank 1. A pulse pump 18 is provided on the support plate 17. The inlet end of the pulse pump 18 is connected to the liquid medicine outlet at one side of the bottom of the chemical liquid storage tank 1 through a liquid medicine inlet pipe 19. The outlet end of the pulse pump 18 is connected to a parallel connection of a liquid medicine delivery pipe 20 and a liquid medicine return pipe 21. The end of the liquid medicine return pipe 21 is connected to the water return port at the top of the chemical liquid storage tank 1. A delivery valve 22 is provided on the liquid medicine delivery pipe 20, and a water return valve 23 is respectively provided on the liquid medicine return pipe 21.

[0024] During operation, first close the transition valve 9, add medicine to the medicine preparation tank 3 through the medicine adding port 5, and open the water inlet valve 7. Tap water enters the medicine preparation tank 3 from the water inlet pipe 6, and the liquid level in the medicine preparation tank 3 gradually rises. When the liquid level reaches the high liquid level switch 15, the high liquid level switch 15 is triggered. At this time, control the water inlet valve 7 to close, and at the same time start the stirring mechanism in the medicine preparation tank 3 to stir the liquid medicine through the stirring mechanism. After stirring is completed, open the transition valve 9, and the liquid medicine in the medicine preparation tank 3 flows into the medicine storage tank 1 through the connecting pipe 8. When the liquid level in the medicine storage tank 1 reaches the low liquid level switch 16, the low liquid level switch 16 is triggered. At this time, start the stirring mechanism in the medicine storage tank 1 to stir the liquid medicine in the medicine storage tank 1, effectively preventing PAC precipitation in the medicine storage tank 1 and solving the cleaning problem caused by PAC precipitation in the medicine storage tank 1. When subsequent sewage treatment is required, open the pulse pump 18 and the conveying valve 22, and convey the liquid medicine in the medicine storage tank 1 to the flocculation reaction tank through the liquid medicine conveying pipe 20.

[0025] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sewage treatment chemical dosing device, comprising a chemical storage tank, characterized in that: A dispensing box is provided at the upper left corner inside the liquid medicine storage tank. The top of the dispensing box is flush with the top of the liquid medicine storage tank. A medicine adding port is provided at the top of the dispensing box body. The bottom of the dispensing box is higher than the bottom of the liquid medicine storage tank. A drain port is provided at a position near the bottom on one side of the dispensing box. An inlet is provided on one side of the liquid medicine storage tank. The drain port of the dispensing box is communicated with the inlet of the liquid medicine storage tank through a connecting pipe. A transition valve is provided on the connecting pipe. Stirring mechanisms are respectively provided inside the dispensing box and the liquid medicine storage tank.

2. The sewage treatment chemical dosing device according to claim 1, characterized in that: A high-level liquid level switch is provided inside the dispensing box, and a low-level liquid level switch is provided inside the liquid medicine storage tank.

3. A sewage treatment chemical dosing device according to claim 1, characterized in that: An overflow pipe is provided at a position near the top on one side of the dispensing box, and the overflow pipe is used to communicate the inside of the dispensing box with the inside of the liquid medicine storage tank.

4. A sewage treatment chemical dosing device according to claim 1, characterized in that: An inlet is provided at a position near the top on one side of the dispensing box. The inlet of the dispensing box is externally connected to a water inlet pipe, and a water inlet valve is provided on the water inlet pipe.

5. A sewage treatment chemical dosing device according to claim 1, characterized in that: Liquid level scales are respectively provided on one side of the dispensing box and the liquid medicine storage tank.

6. The sewage treatment chemical dosing device according to claim 1, characterized in that: A support plate is provided at the top of the liquid medicine storage tank. A pulse pump is provided on the support plate. The inlet end of the pulse pump is connected to a liquid medicine outlet at one side of the bottom of the liquid medicine storage tank through a liquid medicine inlet pipe. The outlet end of the pulse pump is connected to a parallel combination of a liquid medicine delivery pipe and a liquid medicine return pipe. The end of the liquid medicine return pipe is connected to a water return port at the top of the liquid medicine storage tank. A delivery valve is provided on the liquid medicine delivery pipe, and water return valves are respectively provided on the liquid medicine return pipe.

7. The sewage treatment chemical dosing device according to claim 1, characterized in that: Four feet are provided at the bottom of the liquid medicine storage tank.

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