Automatic dosing system for waterworks

Abstract

The utility model discloses an automatic dosing system for waterworks, which comprises two stirring pools, the two stirring pools are respectively communicated with a chemical storage pool through pipelines, and a filter, an electromagnetic valve and a communication valve are sequentially connected on the pipeline for connecting each stirring pool and the chemical storage pool from the chemical storage pool to the stirring pool. Overflow ports are formed in the tops of the stirring pools and the top of the medicine storage pool, the water supplementing pipe is communicated with the two stirring pools, water supplementing valves are connected between the stirring pools and the water supplementing pipe, and the overflow ports of the stirring pools and the overflow ports of the medicine storage pool are formed above the pipe ditch. The automatic dosing system for the waterworks is easy and convenient to install and high in stirring efficiency, solves the problems that in a traditional dosing method, a stirrer is poor in operation working condition and high in failure rate, a stirring pool is inconvenient to clean, and the disassembly and assembly process is tedious, effectively reduces the operation and maintenance cost, and improves the operation reliability and safety of equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of tap water purification, in particular to an automatic dosing system for a water plant. Background Art

[0002] The purpose of the water treatment process of the water plant is to remove impurities from the raw water, so as to obtain qualified water that meets the national water quality requirements. Turbidity reduction is an important production process in the water treatment process of the water plant. In the turbidity reduction treatment process, drug addition is an important link. The drug addition process refers to adding polyaluminium chloride reagents to the raw water to make the suspended matter, colloids, silt, etc. in the water unstable, precipitate, and precipitate, so as to achieve the purpose of water purification.

[0003] The dosing system is generally composed of a stirring device and a dosing device. The stirring device is generally a stirrer installed above the stirring tank, which dissolves the polyaluminium chloride powder in the water by stirring. The dosing device in the water plant is generally dosed by a diaphragm metering pump, and is equipped with a series of auxiliary parts such as a buffer, a pressure gauge, a safety valve, and a back pressure valve.

[0004] Disadvantage 1: In the traditional water plant dosing scheme, the agitator has poor operating conditions, high failure rates, inconvenient cleaning of the mixing tank, and cumbersome disassembly and assembly processes. The reason is that in the traditional mixing scheme, the agitator needs to be fixed in the middle part of the top of the pool, and the mixing propeller is arranged at the bottom of the pool through a transmission rod. A special fixing bracket is required, and the cables need to be wrapped around the pool wall. The agitator and its cables are cumbersome to disassemble and assemble during subsequent maintenance, which hinders the cleaning operation when the pool is cleaned. The agitator needs to be removed before the mixing tank can be cleaned. In addition, the agitator motor is located directly above the pool, where the humidity is high. In addition, water stains will splash onto the motor during cleaning, causing grounding or electric shock accidents, a high failure rate, and low safety.

[0005] Disadvantage 2: The traditional water plant dosing solution mainly uses mechanical diaphragm metering pumps, which are cumbersome to install, have many leakage points, and are time-consuming and labor-intensive to dismantle and repair. The reason is that the dosing system of the mechanical diaphragm metering pump requires many accessories such as dampers, back pressure valves, pressure gauges, safety valves, etc., resulting in many pipe joints and leakage risk points. In addition, the diaphragm metering pump has a complex structure, many consumables, and is difficult and time-consuming to dismantle and repair.

[0006] Therefore, this dosing scheme proposes a new stirring process and dosing method to solve the above-mentioned shortcomings of the traditional dosing scheme. Utility Model Content

[0007] The utility model aims to provide an automatic dosing system for water plants in view of the deficiencies of the prior art, so as to solve the problems existing in the traditional dosing system.

[0008] The technical purpose of this utility model is achieved through the following technical solutions:

[0009] An automatic chemical dosing system for a waterworks includes two mixing tanks. The two mixing tanks are respectively connected to a chemical storage tank through pipelines. On the pipelines connecting each mixing tank to the chemical storage tank, a filter, a solenoid valve, and a connecting valve are sequentially connected from the chemical storage tank to the mixing tank. Overflow ports are provided at the tops of both the mixing tank and the chemical storage tank. The system also includes a makeup water pipe and a trench. The makeup water pipe is respectively connected to the two mixing tanks, and a makeup water valve is connected between the mixing tank and the makeup water pipe. The overflow ports of the mixing tank and the chemical storage tank are both arranged above the trench.

[0010] Preferably, the bottom surface of the trench is an inclined plane, and an emptying pump is provided at the lower end with a lower elevation of the trench.

[0011] Preferably, the chemical storage tank is provided with a chemical feeding pipe. The chemical feeding pipe is divided into two branches and is connected to the chemical storage tank. Peristaltic metering pumps are provided on both of the two branches.

[0012] Preferably, submersible sewage mixing pumps are provided at the bottoms of both of the two mixing tanks.

[0013] Preferably, the submersible sewage mixing pump is arranged at one end of the diagonal line of the mixing tank, and the outlet of the submersible sewage mixing pump faces the other end of the diagonal line.

[0014] Preferably, drain pipes are provided at the bottoms of both of the two mixing tanks, and sewage pumps are provided on the drain pipes.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] The automatic chemical dosing system for a waterworks provided by the present utility model is easy to install and has high mixing efficiency. It solves the problems in the traditional chemical dosing method, such as poor operating conditions of the mixer, high failure rate, inconvenient cleaning of the mixing tank, and cumbersome disassembly and assembly process, effectively reducing the operation and maintenance costs and improving the operation reliability and safety of the equipment.

[0017] In the present utility model, the peristaltic pump dosing system is easy to install and has few accessories. It solves the problems of the traditional mechanical diaphragm metering pump, such as cumbersome installation, many water leakage points, and time-consuming disassembly, repair, and overhaul. The dosing system adopts a one-use-one-backup design and operates stably and reliably. The peristaltic chemical dosing system operates smoothly, has low noise, high flow regulation accuracy, and is easy to replace consumables, and has high chemical dosing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model.

[0019] Figure 2 is a schematic diagram of the water flow direction in the mixing tank of the present utility model.

[0020] In the above-mentioned drawings: 1. Stirring tank; 2. Chemical storage tank; 3. Filter; 4. Solenoid valve; 5. Connecting valve; 6. Overflow port; 7. Make-up water pipe; 8. Pipe trench; 9. Make-up water valve; 10. Drainage pump; 11. Chemical feeding pipe; 12. Peristaltic metering pump; 13. Submersible sewage stirring pump; 14. Vent pipe; 15. Sewage pump. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] As a preferred embodiment of the present invention, as Figure 1 shown, this embodiment provides an automatic chemical dosing system for a waterworks, including two stirring tanks 1. The two stirring tanks 1 are respectively connected to the chemical storage tank 2 through pipelines. On the pipeline connecting each stirring tank 1 and the chemical storage tank 2, a filter 3, a solenoid valve 4, and a connecting valve 5 are sequentially connected from the chemical storage tank 2 to the stirring tank 1. Overflow ports 6 are provided at the tops of both the stirring tank 1 and the chemical storage tank 2. It also includes a make-up water pipe 7 and a pipe trench 8. The make-up water pipe 7 is respectively connected to the two stirring tanks 1, and a make-up water valve 9 is connected between the stirring tank 1 and the make-up water pipe 7. The overflow ports 6 of the stirring tank 1 and the chemical storage tank 2 are both arranged above the pipe trench 8, and when overflow occurs, it will directly overflow into the pipe trench 8.

[0023] In some embodiments, as Figure 1 shown, in order to facilitate the discharge of the overflowed chemical liquid in the pipe trench 8, the bottom surface of the pipe trench 8 is inclined, and a drainage pump 10 is provided at the lower end with a lower elevation of the pipe trench 8. After overflow occurs, the pipe trench 8 can be emptied regularly.

[0024] In some embodiments, the chemical storage tank 2 is provided with a chemical feeding pipe 11. The chemical feeding pipe 11 is divided into two branches and is connected to the chemical storage tank 2. Peristaltic metering pumps 12 are provided on both of the two branches. In this embodiment, the two branches and the peristaltic metering pumps 12 are designed for one use and one standby, so as to ensure that the addition of chemicals to the raw water is not affected by the failure of the peristaltic metering pump 12.

[0025] In some preferred embodiments, submersible sewage agitator pumps 13 are provided at the bottoms of both of the two agitation tanks 1. The submersible sewage agitator pumps 13 are low-lift stainless steel submersible pumps installed at the bottoms of the agitation tanks. By means of the submersible sewage agitator pumps 13, the solution with a relatively high concentration at the bottom is quickly pumped to the upper and middle parts of the water tank, which can make the mixing efficiency higher. This agitation system does not need to install a bracket. Only by fixing the submersible pump at the corner of the bottom of the tank, large particle agglomerated medicaments can be dispersed by a high-speed impeller and sprayed to the upper and middle layers of the water tank, and the medicaments can be quickly dissolved and homogenized through convection.

[0026] In this embodiment, when replenishing water and medicaments to the agitation tank, taking the 1# agitation tank as an example, first open the water replenishing valve 9. After the liquid level of the agitation tank rises to the set water level, close the water replenishing valve 9 to stop water replenishment, start the submersible sewage agitator pump 13, and at the same time supplement polyaluminum chloride medicaments at a concentration of 5%. The liquid medicine agitation starts. After reaching the set time, the submersible sewage agitator pump 13 stops agitation, and the liquid medicine starts to stand still. After reaching the set time, the standing still of the liquid medicine ends. At this time, the liquid medicine in the agitation tank 1 reaches the available state and can replenish medicaments to the medicine storage tank 1 according to requirements. The agitation tank 1 is provided with an overflow port 6. When the water replenishing valve 7 fails or no one is watching and the liquid level exceeds the upper limit, the excess liquid overflows into the pipe trench 8 through the overflow port to ensure that the agitation tank 1 does not have a water overflow accident. When the liquid level in the pipe trench 8 reaches the set upper limit, start the drain pump 10 to discharge the waste water in the pipe trench 8 to the recovery device. When the agitation tank 1 needs to be cleaned, the sewage pump 15 can be opened to discharge the liquid medicine in the tank to the pipe trench 8 for cleaning the water tank.

[0027] The agitation tank 1 is connected to the medicine storage tank 2 by a pipeline and is equipped with a connecting valve 5. This valve is normally open. When the liquid level of the medicine storage tank 2 reaches the lower limit, start replenishing medicaments. The solenoid valve 4 is opened, and the liquid medicine enters the medicine storage tank 2 through the connecting valve 5, the solenoid valve 4, and the filter 3. When the liquid level of the medicine storage tank 2 reaches the upper limit, close the solenoid valve 4, and the replenishment of medicaments to the medicine storage tank 2 ends. The medicine storage tank 2 is equipped with an overflow port. When the solenoid valve 4 fails to stop replenishing medicaments, the excess liquid medicine can overflow into the pipe trench 8 to prevent the accident of the liquid medicine in the medicine storage tank from overflowing.

[0028] In some embodiments, as Figure 2 shown, the submersible sewage agitator pump 13 is arranged at one end of the diagonal line of the agitation tank 1, and the outlet of the submersible sewage agitator pump 13 faces the other end of the diagonal line. By fixing the submersible sewage agitator pump 13 at the corner of the bottom of the tank, large particle agglomerated medicaments can be dispersed by a high-speed impeller and sprayed to the upper and middle layers of the water tank, and the medicaments can be quickly dissolved and homogenized through convection.

[0029] In some preferred embodiments, drain pipes 14 are provided at the bottoms of both of the two agitation tanks 1, and sewage pumps 15 are provided on the drain pipes 14 to facilitate the emptying and cleaning of the inside of the agitation tanks 1.

[0030] During actual use, when the turbidity of the raw water in the waterworks reaches the set upper limit during on-line monitoring, the chemical dosing is started. The PLC automatically calculates the chemical dosing flow rate according to the turbidity of the raw water and a pre-set formula, converts it into a frequency, and then gives it to the peristaltic metering pump 12. The two peristaltic metering pumps are in standby mode and automatically select the peristaltic metering pump for chemical dosing according to the running time and the switching status. The PLC automatically calculates the chemical dosing amount according to the change in the turbidity of the raw water, and gives the frequency of the peristaltic pump in real time, so that the chemical dosing amount changes in real time with the turbidity of the raw water, achieving the optimal chemical dosing effect and ensuring that the turbidity of the water leaving the waterworks is always within the excellent range. The automatic chemical dosing system of the waterworks of the present utility model adopts a fully automated chemical dosing process. From the start to the stop of chemical dosing, an automated process is used. The chemical dosing flow rate is automatically adjusted according to the turbidity of the raw water, greatly reducing the labor cost during the operation of the chemical dosing system, with high reliability and accuracy. By monitoring the turbidity of the raw water, chemical dosing can be carried out in advance before the turbidity of the water leaving the factory exceeds the standard, and the chemical dosing flow rate can be automatically adjusted according to the change in turbidity, ensuring that the turbidity of the water leaving the waterworks remains within the excellent range.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present utility model, and they should all be covered by the scope of the claims of the present utility model.

Claims

1. An automatic dosing system for a water plant, characterized by: It includes two stirring tanks, which are connected to the medicine storage tank through pipelines respectively. The pipelines connecting each stirring tank and the medicine storage tank are connected to a filter, a solenoid valve and a connecting valve in sequence from the medicine storage tank to the stirring tank. Overflow ports are provided on the tops of the stirring tank and the medicine storage tank. It also includes a water supply pipe and a trench. The water supply pipes are connected to the two stirring tanks respectively, and a water supply valve is connected between the stirring tank and the water supply pipe. The overflow ports of the stirring tank and the medicine storage tank are both provided above the trench.

2. The automatic dosing system for a waterworks according to claim 1, characterized in that: The bottom surface of the pipe trench is an inclined surface, and a drain pump is arranged at the lower end of the pipe trench.

3. The automatic dosing system for a waterworks according to claim 1, characterized in that: The medicine storage tank is provided with a drug delivery tube, which is divided into two branches and both are connected with the medicine storage tank, and the two branches are both provided with peristaltic metering pumps.

4. The automatic dosing system for a waterworks according to claim 1, characterized in that: Submersible sewage stirring pumps are provided at the bottom of the two stirring tanks.

5. The automatic dosing system for waterworks according to claim 4, characterized in that: The submersible sewage stirring pump is arranged at one end of the diagonal of the stirring tank, and the outlet of the submersible sewage stirring pump faces the other end of the diagonal.

6. The automatic dosing system for waterworks according to claim 1, characterized in that: The bottoms of the two stirring tanks are both provided with vent pipes, and the vent pipes are provided with sewage pumps.

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