Calcium hypochlorite solution extracting and filtering device

Abstract

The invention discloses a calcium hypochlorite solution extracting and filtering device, and aims to solve the problem that undissolved impurities affect the disinfection effect and water quality when calcium hypochlorite particles are used for disinfection in the prior art. The device comprises a dosing barrel, ultrafiltration membrane filaments are arranged in the dosing barrel, the top of the dosing barrel is provided with an injection port and a metering pump, a water inlet of the metering pump is connected with an outlet of the ultrafiltration membrane filaments through a dosing pipe, and a water outlet of the metering pump is connected to a dosing point through a dosing pipe; the device is compact and simple in overall structure and convenient to use, undissolved residues in a calcium hypochlorite solution can be effectively filtered out, a calcium hypochlorite clear liquid without solid impurities is extracted from the dosing barrel and conveyed to a pipeline or a clear water tank, the calcium hypochlorite clear liquid is used for disinfecting drinking water, and the disinfection effect is better; the ultrafiltration membrane wires are of a disc-shaped structure, so that the effective filtering area is increased, and the filtering efficiency and the water yield are improved; meanwhile, blockage of the dosing pump is reduced, and the service life of the dosing pump is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of drinking water disinfection, and specifically relates to a calcium hypochlorite solution extraction and filtration device. Background Art

[0002] Calcium hypochlorite particles, as a solid disinfectant, have an available chlorine content of approximately 60% and have broad application prospects in the field of drinking water disinfection. Compared with sodium hypochlorite solution, it has the advantages of convenient transportation, easy access, lower cost, and less volatility.

[0003] However, during actual use, when calcium hypochlorite particles are not completely dissolved, in a supersaturated state, or after contact with air, some solid impurities will be left in the dosing tank. These impurities cannot be directly added to drinking water for disinfection, otherwise it may affect water quality and disinfection effect; in addition, it may also clog the dosing pump. Summary of the Invention

[0004] Therefore, this application provides a calcium hypochlorite solution extraction and filtration device to solve the problems in the prior art that when using calcium hypochlorite particles for disinfection, undissolved impurities affect the disinfection effect and water quality.

[0005] To achieve the above object, this application provides the following technical solutions:

[0006] A calcium hypochlorite solution extraction and filtration device includes a dosing tank. An ultrafiltration membrane filament is arranged at the bottom of the dosing tank. The ultrafiltration membrane filament is coiled into a disk-shaped structure. An injection port and a metering pump are arranged at the top of the dosing tank. The injection port is used to add tap water and calcium hypochlorite particles. The water inlet of the metering pump is connected to the outlet of the ultrafiltration membrane filament through a medicine suction pipe, and the water outlet of the metering pump is connected to a dosing point through a medicine adding pipe.

[0007] Optionally, the outlet of the ultrafiltration membrane filament is connected to the medicine suction pipe through an adapter.

[0008] Optionally, a back pressure valve is arranged between the dosing point and the medicine adding pipe.

[0009] Optionally, the metering pump is fixed to the top of the dosing tank through a bracket.

[0010] Optionally, the ultrafiltration membrane filament is a PVDF hollow fiber ultrafiltration membrane filament with a filtration pore size of 0.05 microns.

[0011] Optionally, the shape of the ultrafiltration membrane filament is cylindrical.

[0012] Optionally, the injection port is connected to the tap water pipeline through a tap water bypass, and a ball valve is arranged at one end of the tap water bypass close to the dosing tank.

[0013] Optionally, the chemical addition point is located on the tap water pipeline.

[0014] Compared with the prior art, the present application has at least the following beneficial effects:

[0015] 1. Based on further analysis and research of the problems in the prior art, the present application provides a calcium hypochlorite solution extraction and filtration device, including a chemical addition tank. An ultrafiltration membrane filament is arranged at the bottom of the chemical addition tank. An injection port and a metering pump are arranged at the top of the chemical addition tank. The injection port is used for adding tap water and calcium hypochlorite particles. The water inlet of the metering pump is connected to the outlet of the ultrafiltration membrane filament through a medicine suction pipe, and the water outlet of the metering pump is connected to the chemical addition point through a chemical addition pipe. The overall structure of the present application is compact, simple and easy to use. It can effectively filter the undissolved residues in the calcium hypochlorite solution, extract the calcium hypochlorite clear liquid without solid impurities from the chemical addition tank, and transport it to the pipeline or the clear water tank for drinking water disinfection. The disinfection effect is better, which can ensure the water quality safety, protect the public health, and avoid the secondary pollution problem that may be caused by the addition of residues. The ultrafiltration membrane filament in a disk structure increases the effective filtration area, thereby improving the filtration efficiency and water production, and is also beneficial to saving space. At the same time, it also reduces the blockage of the chemical addition pump and improves the service life of the chemical addition pump.

[0016] 2. The ultrafiltration membrane filament of the present application is a PVDF hollow fiber ultrafiltration membrane filament, which has the ability to resist corrosion and calcium hypochlorite. Its filtration pore diameter is 0.05 microns, and it can effectively filter and extract the calcium hypochlorite clear liquid.

[0017] 3. The metering pump of the present application is fixed to the top of the chemical addition tank through a bracket, effectively utilizing the vertical space, reducing the floor area, especially suitable for places with limited space, facilitating the operation and maintenance of operators, etc. At the same time, since the connection between the metering pump and the chemical addition tank is short, the pipeline length is reduced, the leakage risk caused by the loosening or damage of the pipeline connection is reduced, and the pipeline resistance can also be reduced, improving the transportation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more intuitively illustrate the prior art and the present application, the following exemplary drawings are given. It should be understood that the specific shapes and structures shown in the drawings generally should not be regarded as limiting conditions when implementing the present application. For example, those skilled in the art are capable of making conventional adjustments or further optimizations to the addition / deletion / attribution division of certain units (components), specific shapes, positional relationships, connection methods, dimensional proportional relationships, etc. based on the technical concept disclosed in the present application and the exemplary drawings.

[0019] Figure 1 It is a schematic structural diagram of a calcium hypochlorite solution extraction and filtration device provided by an embodiment of the present application.

[0020] Description of the reference numerals:

[0021] 1. Chemical dosing tank; 101. Injection port; 2. Ultrafiltration membrane filaments; 3. Metering pump; 4. Chemical suction pipe; 5. Chemical dosing pipe; 6. Adapter; 7. Back pressure valve; 8. Bracket;

[0022] 9. Tap water pipeline; 10. Incoming water bypass; 11. Ball valve; 12. Chemical dosing point; 13. Calcium hypochlorite solution. Detailed implementation mode

[0023] The following further details the present application through specific embodiments in conjunction with the accompanying drawings.

[0024] In the description of the present application: Unless otherwise specified, the meaning of "a plurality" is two or more. Terms such as "first", "second", "third", etc. in the present application are intended to distinguish the objects being referred to, and do not have special significance in terms of technical connotations (for example, it should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0025] Terms such as "upper", "lower", "left", "right", "middle", etc. cited in the present application are usually indications of the general relative position relationship for the convenience of intuitively understanding with reference to the accompanying drawings, and are not absolute limitations on the position relationship in the actual product.

[0026] An embodiment of the present application, a calcium hypochlorite solution extraction and filtration device, as Figure 1 shown, includes a chemical dosing tank 1. The bottom of the chemical dosing tank 1 is provided with ultrafiltration membrane filaments 2. The ultrafiltration membrane filaments 2 are wound into a disc-shaped structure. The top of the chemical dosing tank 1 is provided with an injection port 101 and a metering pump 3. The injection port 101 is used to add tap water and calcium hypochlorite particles (calcium hypochlorite powder). The water inlet of the metering pump 3 is connected to the outlet of the ultrafiltration membrane filaments 2 through a chemical suction pipe 4. The water outlet of the metering pump 3 is connected to the chemical dosing point 12 through a chemical dosing pipe 5.

[0027] The function of the chemical dosing tank 1 is to configure and store the calcium hypochlorite solution 13; the function of the ultrafiltration membrane filaments 2 is to filter the impurities of the calcium hypochlorite solution 13, thereby improving the disinfection effect of the calcium hypochlorite solution 13. Moreover, the ultrafiltration membrane filaments 2 are in a disc-shaped structure, increasing the effective filtration area and improving the filtration efficiency and water production; the function of the metering pump 3 is to accurately transport the liquid.

[0028] Preferably, the outlet of the ultrafiltration membrane filaments 2 is connected to the chemical suction pipe 4 through an adapter 6.

[0029] Preferably, a back pressure valve 7 is provided between the chemical dosing point 12 and the chemical dosing pipe 5. Its function is to maintain the system pressure stability, ensure the stable operation and safe use of the equipment.

[0030] Preferably, the metering pump 3 is fixed to the top of the chemical dosing tank 1 through a bracket 8.

[0031] Preferably, the ultrafiltration membrane filaments 2 are PVDF hollow fiber ultrafiltration membrane filaments. Such ultrafiltration membrane filaments 2 have the ability to resist corrosion and calcium hypochlorite. Their filtration pore size is 0.05 microns. Due to their extremely small pore size, they can effectively filter and extract the clear liquid in the calcium hypochlorite solution 13, ensuring that the extracted solution does not contain any visible solid impurities to the naked eye. Compared with the traditional method of directly adding calcium hypochlorite or bleaching powder to water, this method can not only accurately control the dosage of the chemical agent, but also avoid the problem of secondary pollution that may be caused by the addition of residues.

[0032] More preferably, the shape of the ultrafiltration membrane filaments 2 is columnar.

[0033] Preferably, the injection port 101 is connected to the tap water pipeline 9 through the incoming water bypass 10, and a ball valve 11 is provided at one end of the incoming water bypass 10 close to the chemical dosing tank 1.

[0034] Preferably, the chemical dosing point 12 is located on the tap water pipeline 9.

[0035] The assembly sequence and working principle of the above embodiments are as follows:

[0036] First, a fixed amount of calcium hypochlorite particles are added to the chemical dosing tank 1 through the injection port 101. Then, the ball valve 11 is opened, and tap water is poured into the chemical dosing tank 1 to dissolve and dilute the calcium hypochlorite particles, and a calcium hypochlorite solution 13 with a predetermined concentration is prepared by stirring; of course, the prepared calcium hypochlorite solution 13 can also be directly injected into the chemical dosing tank 1;

[0037] Then, the columnar ultrafiltration membrane filaments 2 coiled into a disk-shaped structure are placed at the bottom of the chemical dosing tank 1. At the same time, a bracket 8 for fixing the metering pump 3 is installed at the top of the chemical dosing tank 1. The inlet of the metering pump 3 is connected to the outlet of the ultrafiltration membrane filaments 2 through a medicine suction pipe 4, and the outlet of the metering pump 3 is connected to the back pressure valve 7 and a designated position (the final chemical dosing point 12) through a chemical dosing pipe 5;

[0038] In this way, after the calcium hypochlorite solution 13 is fully filtered by the ultrafiltration membrane filaments 2 in the chemical dosing tank 1, the metering pump 3 sucks in the calcium hypochlorite clear liquid filtered by the ultrafiltration membrane filaments 2 through the medicine suction pipe 4, and accurately adds the treated calcium hypochlorite clear liquid to the final chemical dosing point 12 through the outlet of the metering pump 3, the chemical dosing pipe 5, and the back pressure valve 7.

[0039] This application utilizes the high-efficiency filtration ability of the ultrafiltration membrane filaments to extract calcium hypochlorite clear liquid without solid impurities from the chemical dosing tank, and transports it to pipelines or water storage tanks for drinking water disinfection. The disinfection effect is good, and it can ensure water quality safety, protect public health, and at the same time extend the service life of the metering pump.

[0040] In addition, through durability experiments, it is found that when the ultrafiltration membrane filaments are used in a high-concentration calcium hypochlorite solution, their filtration ability does not decay, the material is not damaged, and there is no caking phenomenon on the surface of the membrane filaments.

[0041] The technical features of the above embodiments can be combined arbitrarily (as long as there is no contradiction in the combination of these technical features). For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written out should also be considered to be within the scope described in this specification.

Claims

1. A calcium hypochlorite solution extraction and filtration device, characterized in that: It comprises a dosing barrel, the bottom of which is provided with an ultrafiltration membrane filament, the ultrafiltration membrane filament is coiled into a disc-shaped structure, the top of the dosing barrel is provided with an injection port and a metering pump, the injection port is used to add tap water and calcium hypochlorite particles, the water inlet of the metering pump is connected to the outlet of the ultrafiltration membrane filament through a drug suction tube, and the water outlet of the metering pump is connected to the dosing point through a dosing tube.

2. The calcium hypochlorite solution extraction and filtration device according to claim 1, characterized in that: The output port of the ultrafiltration membrane thread is connected to the drug suction tube via a conversion joint.

3. The calcium hypochlorite solution extraction and filtration device according to claim 1, characterized in that: A back pressure valve is arranged between the dosing point and the dosing pipe.

4. The calcium hypochlorite solution extraction and filtration device according to claim 1, characterized in that: The metering pump is fixed to the top of the dosing barrel through a bracket.

5. The calcium hypochlorite solution extraction and filtration device according to claim 1, characterized in that: The ultrafiltration membrane yarn is a PVDF hollow fiber ultrafiltration membrane yarn, and its filtration pore size is 0.05 microns.

6. The calcium hypochlorite solution extraction and filtration device according to claim 1 or 5, characterized in that: The ultrafiltration membrane filament is in a columnar shape.

7. The calcium hypochlorite solution extraction and filtration device according to claim 1, characterized in that: The injection port is connected to the tap water pipeline through a water bypass, and a ball valve is arranged on one end of the water bypass close to the dosing barrel.

8. The calcium hypochlorite solution extraction and filtration device according to claim 1 or 7, characterized in that: The dosing point is located on the tap water pipeline.

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