Water treatment system

Abstract

The utility model discloses a water treatment system which comprises a gas-water mixing unit, and the gas-water mixing unit is provided with a first liquid inlet, a gas inlet and a first liquid outlet; the pressurizing tank is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet is communicated with the first liquid outlet; the water treatment system comprises a first liquid inlet, a second liquid outlet and a filter unit, the filter unit comprises a filter membrane, a third liquid inlet located on the upstream of the filter membrane and a water production port located on the downstream of the filter membrane are formed in the filter unit, and the second liquid outlet is communicated with the third liquid inlet. The process flow of sewage treatment is shortened, the treatment cost is low, the utilization rate of ozone is high, filter membrane pollution is convenient to control, and the water treatment effect is high.

Description

Technical Field

[0001] The present application is applied to the field of water treatment technology, and in particular relates to a water treatment system. Background Art

[0002] With the continuous increase in the output and types of organic compounds, such as organic chemicals, petrochemicals, medicines, pesticides, insecticides and herbicides, these substances will enter natural water bodies through human activities, causing water pollution. At present, the treatment processes for slightly polluted water sources are mainly divided into pretreatment processes, conventional treatment processes and deep treatment processes, among which deep treatment processes are the core.

[0003] At present, the commonly used deep treatment process for slightly polluted water sources is ozone + activated carbon + ultrafiltration. This method has been widely used and has a good removal effect on ammonia nitrogen and organic matter. Although this process has a certain treatment effect on slightly polluted water sources, its process flow is long, the treatment cost is high, the utilization rate of ozone is low, and the control of membrane pollution is relatively difficult. Utility Model Content

[0004] The purpose of this application is to solve at least one of the technical problems existing in the prior art and to provide a water treatment system that can shorten the process of sewage treatment, has low sewage treatment costs, and has good sewage treatment effects.

[0005] The technical solution adopted by this application to solve its technical problems is:

[0006] A water treatment system comprising

[0007] An air-water mixing unit, wherein the air-water mixing unit is provided with a first liquid inlet, an air inlet and a first liquid outlet;

[0008] A booster tank, wherein the booster tank is provided with a second liquid inlet and a second liquid outlet, wherein the second liquid inlet is connected to the first liquid outlet;

[0009] The filter unit includes a filter membrane, and is provided with a third liquid inlet located upstream of the filter membrane and a water outlet located downstream of the filter membrane, and the second liquid outlet is connected to the third liquid inlet.

[0010] In certain embodiments of the present application, a reflux pipe is included, and the filter unit is provided with a third liquid outlet located downstream of the filter membrane. The liquid inlet end of the reflux pipe is connected to the third liquid outlet, and the liquid outlet end of the reflux pipe is connected to the first liquid inlet.

[0011] In certain embodiments of the present application, the filtration unit includes a dissolved air releaser, which is located at the bottom of the filter membrane.

[0012] In certain embodiments of the present application, the gas-water mixing unit includes a gas-water mixing pump, and the first liquid inlet, the gas inlet, and the first liquid outlet are all provided on the gas-water mixing pump.

[0013] In certain embodiments of the present application, the gas-water mixing unit includes an ozone generator, and the ozone generator is connected to the gas-water mixing pump through the gas inlet.

[0014] In certain embodiments of the present application, the gas-water mixing unit includes a water inlet tank, and the water inlet tank is connected to the gas-water mixing pump through the first liquid inlet.

[0015] In certain embodiments of the present application, the first liquid outlet and the second liquid inlet are connected via a first pipe, and a first flow meter is provided on the first pipe.

[0016] In certain embodiments of the present application, a pressure gauge is provided on the boosting tank, and the pressure inside the boosting tank is 0.2-0.3 MPa.

[0017] In certain embodiments of the present application, the second liquid outlet is connected to the third liquid inlet via a second pipe, a water inlet valve and a drain valve are provided on the second pipe, and the third liquid inlet is located between the water inlet valve and the drain valve.

[0018] In certain embodiments of the present application, a water production box is included, wherein the water inlet of the water production box is connected to the water production outlet via a third pipe, and a second flow meter is provided on the third pipe.

[0019] One of the above technical solutions has at least one of the following advantages or beneficial effects: the air inlet of the water treatment system can be filled with ozone, the air-water mixing unit can dissolve air and water, that is, mix ozone and polluted water together, the booster tank can realize high-pressure dissolved air, thereby improving the utilization efficiency of ozone, and inputting the water dissolved in ozone into the filtration unit, so there is no need to set up an ultrafiltration water inlet pump. In the filtration unit, ozone microbubbles and the filter membrane are coupled, which reduces the pollution of the filter membrane, extends the filter membrane cleaning cycle, and enhances the removal effect of organic matter in slightly polluted water sources. The water treatment system shortens the process flow of sewage treatment by integrating high-efficiency air-water dissolution technology and ozone micro-flocculation technology, has low treatment cost, high ozone utilization rate, easy control of filter membrane pollution, and high water treatment effect.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic structural diagram of an embodiment of the present application;

[0023] Figure 2 It is a structural diagram of a filtration unit in one embodiment of the present application. DETAILED DESCRIPTION

[0024] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0025] In this application, if there is a description of directions (up, down, left, right, front and back), it is only for the convenience of describing the technical solution of this application, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application.

[0026] In this application, "several" means one or more, "multiple" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself; "above," "below," and "within" are understood to include the number itself. In the description of this application, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0027] In this application, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Persons skilled in the art can reasonably determine the specific meanings of these terms in this application based on the specific content of the technical solution.

[0028] The embodiment of the present application provides a water treatment system, see Figure 1, including an air-water mixing unit 100, a boosting tank 200 and a filtering unit 300. The air-water mixing unit 100 is provided with a first liquid inlet 111, an air inlet 112 and a first liquid outlet 113; the boosting tank 200 is provided with a second liquid inlet 210 and a second liquid outlet 220, and the second liquid inlet 210 is connected to the first liquid outlet 113; the filtering unit 300 includes a filter membrane, and the filtering unit 300 is provided with a third liquid inlet 310 located upstream of the filter membrane and a water production port 320 located downstream of the filter membrane, and the second liquid outlet 220 is connected to the third liquid inlet 310.

[0029] The air inlet 112 of the water treatment system can be filled with ozone, and the air-water mixing unit 100 can dissolve air and water, that is, mix ozone and polluted water together. The booster tank 200 can achieve high-pressure dissolved air, thereby improving the utilization efficiency of ozone, and input the water dissolved with ozone into the filter unit 300, so there is no need to set up an ultrafiltration water inlet pump. In the filter unit, ozone microbubbles and the filter membrane are coupled, which reduces the pollution of the filter membrane, extends the filter membrane cleaning cycle, and enhances the removal effect of organic matter in slightly polluted water sources. The water treatment system shortens the process flow of sewage treatment by integrating high-efficiency air-water dissolution technology and ozone micro-flocculation technology, has low treatment costs, high ozone utilization rate, easy control of filter membrane pollution, and high water treatment effect.

[0030] Ozone has a strong oxidation ability, and general organic membranes are difficult to operate stably in an ozone environment for a long time. Therefore, the filter membrane used in this application is an oxidation-resistant PVDF ultrafiltration membrane. The ultrafiltration membrane is made of polyvinylidene fluoride (PVDF) and is produced using thermally induced phase separation technology (TIPS). It is a hydrophobic ultrafiltration membrane with a contact angle greater than 90° and strong oxidation resistance. Its filtration ability, molecular structure and physical properties are not damaged in an ozone environment for a long time.

[0031] In some embodiments, the water treatment system includes a return pipe 400. The filter unit 300 is provided with a third liquid outlet 330 located downstream of the filter membrane. The liquid inlet of the return pipe 400 is connected to the third liquid outlet 330, and the liquid outlet of the return pipe 400 is connected to the first liquid inlet 111. Some of the water that passes through the filter membrane flows back to the water inlet tank 130. The residual ozone contacts the influent water, which can perform pre-oxidation and micro-flocculation, thereby improving ozone utilization and effectively reducing ozone dosage.

[0032] In some embodiments, a pressure sensor 410 is provided at the liquid inlet end of the reflux pipe 400 . The pressure sensor 410 is a reflux pressure sensor that can record the pressure on the reflux pipe 400 .

[0033] After the water in the booster tank 200 enters the filter membrane, the pressure will decrease and the ozone dissolved in the water will be released from the water. The filter unit 300 includes a dissolved air releaser 340. The dissolved air releaser 340 is located at the bottom of the filter membrane. The dissolved air releaser 340 can generate microbubbles, converting dissolved air water (water containing ozone) into tiny bubbles, allowing the ozone dissolved in the water to form microbubbles and be released, thereby promoting the removal of pollutants in the water. In other words, after the water in the booster tank 200 passes through the dissolved air releaser 340, the ozone dissolved in the water will form microbubbles of 20 to 30 microns. The microbubbles will flush the surface of the filter membrane and react with the filter membrane to generate hydrophilic hydroxyl groups on the surface of the filter membrane, which can improve the flux and anti-pollution performance of the ultrafiltration membrane. Ozone helps remove impurities and pollutants in the water, improves water quality and enhances the purification effect of water quality. Ozone flushing the surface of the ultrafiltration membrane will have a physical and chemical cleaning effect on the membrane, which can extend the membrane cleaning cycle.

[0034] In some embodiments, the air-water mixing unit 100 includes an air-water mixing pump 110, which injects ozone into the incoming water. The first liquid inlet 111, the air inlet 112 and the first liquid outlet 113 are all opened on the air-water mixing pump 110. The air-water mixing pump 110 quickly mixes the ozone with the incoming water through a high-speed rotating impeller, and cuts the ozone into small bubbles, which enter the boosting tank 200 together. The boosting tank 200 can ensure sufficient water flow and provide stable water pressure to avoid the impact of water pressure fluctuations on the water treatment system. The boosting tank 200 can reduce the pressure shock of pipelines and equipment, extend the service life of the water treatment system, and do not need to set up an additional water inlet pump, thereby improving the operating efficiency of the entire water treatment system. In the case of no water inlet, that is, when the water supply is cut off or the water pressure is insufficient, the boosting tank 200 can provide a certain amount of reserve water.

[0035] In some embodiments, the air-water mixing unit 100 includes an ozone generator 120, which is connected to the air-water mixing pump 110 through the air inlet 112. The ozone generator 120 can generate ozone gas efficiently and quickly. The ozone generator can quickly eliminate harmful microorganisms such as bacteria, viruses, molds, etc. in the air and water, achieve the effect of sterilization and disinfection, and avoid secondary contamination of the incoming water. The ozone generator 120 can also accurately control the amount and concentration of ozone produced, and prepare ozone on demand at any time without the need to store a large amount of ozone gas, reducing safety risks. The produced ozone has high purity and can flexibly adjust the ozone production and usage time according to actual conditions. It has low cost, simple operation, easy use and maintenance, no pollutants are generated during the preparation process, and is environmentally friendly.

[0036] In some embodiments, the air-water mixing unit 100 includes an inlet tank 130, which is connected to the air-water mixing pump 110 through the first liquid inlet 111. Part of the water passing through the filter membrane flows back to the inlet tank 130, and the residual ozone contacts the inlet water, which can play a role of pre-oxidation and micro-flocculation, thereby improving the utilization rate of ozone and effectively saving the amount of ozone added. The inlet tank 130 has a buffering effect, reducing the fluctuation of the inlet flow rate and providing more stable inlet conditions. The inlet tank 130 helps the sediment to settle in the tank, reducing the burden of subsequent water treatment, and allowing the inlet water to enter the water treatment system more evenly. It can also play a certain role in regulating the inlet water temperature and reducing the impact and wear of the water flow on the downstream device. The inlet tank 130 can be cleaned and maintained regularly to ensure the quality of the inlet water, and provide a certain water storage capacity to enhance the reliability of the system. The inlet water situation can also be monitored in real time by installing monitoring equipment on the inlet tank 130.

[0037] In some embodiments, the first liquid outlet 113 and the second liquid inlet 210 are connected by a first pipe 500. A first flow meter 510 is provided on the first pipe 500. The first flow meter 510 is an electromagnetic flow meter. The electromagnetic flow meter is not affected by the density, viscosity and other properties of the fluid and can provide accurate flow measurement results. The electromagnetic flow meter does not generate resistance to the fluid flow, does not cause pressure loss, can quickly respond to flow changes, has a simple structure, good stability, long service life, is easy to install, and has low maintenance costs.

[0038] In some embodiments, a pressure gauge 230 is provided on the boosting tank 200. The boosting tank 200 can increase the pressure of the water. The pressure inside the boosting tank 200 is 0.2 to 0.3 MPa. This pressure can ensure that the ozone is completely dissolved in the water. A pressure reaction unit is formed inside the boosting tank 200. The pressure gauge 230 monitors the pressure inside the boosting tank 200. The hydraulic retention time inside the boosting tank 200 is 10 to 15 minutes. Due to the setting of the boosting tank 200, the boosting tank 200 can provide kinetic energy to the filtered water passing through the filter membrane. There is no need to set up an ultrafiltration water inlet pump. The pressure provided by the boosting tank 200 can be directly used for filtration, which reduces the required equipment and makes the water treatment system simpler.

[0039] Currently, ozone is added to slightly polluted water sources directly into the ozone contact tank through pipes and aerators. This setup results in low ozone solubility at conventional pressures, large ozone bubbles formed by the aerator, poor mass transfer in water, and low utilization. The air-water mixing pump 110 in the version application cuts ozone into tiny bubbles for rapid mixing with the incoming water, improving the efficiency of mixing. After the ozone and water enter the booster tank 200, at a pressure of 0.2 to 0.3 MPa, the ozone solubility increases and the ozone is completely dissolved, allowing it to fully react with pollutants. The reaction efficiency is orders of magnitude higher than that of microbubbles. The pressure reaction unit is designed with a hydraulic retention time to ensure that ozone can fully oxidize organic matter in the water, improving purification capacity. Compared to the approximately 20-minute hydraulic retention time of a traditional ozone contact tank, the reaction time is shortened to 1 / 4 to 1 / 2, improving treatment efficiency.

[0040] In some embodiments, the second liquid outlet 220 is connected to the third liquid inlet 310 through a second pipe 600, and the second pipe 600 is provided with a water inlet valve 610 and a drain valve 620, and the third liquid inlet 310 is located between the water inlet valve 610 and the drain valve 620. The second pipe 600 is provided with a water inlet pressure sensor 630, and the water inlet pressure sensor 630 is located between the water inlet valve 610 and the third liquid inlet 310. The water inlet pressure sensor 630 can record the water inlet pressure of the filter membrane.

[0041] The water inlet valve 610 and the drain valve are both automatic valves.

[0042] In some embodiments, the water treatment system includes a water production tank 700, the water inlet 710 of the water production tank 700 is connected to the water production port 320 through a third pipe 800, a second flow meter 810 is provided on the third pipe 800, a water production automatic valve 820 is provided on the third pipe 800, and a water production pressure sensor 830 is provided on the third pipe 800. The water production pressure sensor 830 can record the water production pressure of the filter membrane.

[0043] The second flow meter 810 is a water production electromagnetic flow meter, which can record the water production of the filter membrane.

[0044] Throughout this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0045] Of course, the invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all within the scope defined by the claims of the present application.

Claims

1. A water treatment system, characterized in that: include An air-water mixing unit, wherein the air-water mixing unit is provided with a first liquid inlet, an air inlet and a first liquid outlet; A booster tank, wherein the booster tank is provided with a second liquid inlet and a second liquid outlet, wherein the second liquid inlet is connected to the first liquid outlet; The filter unit includes a filter membrane, and is provided with a third liquid inlet located upstream of the filter membrane and a water outlet located downstream of the filter membrane, and the second liquid outlet is connected to the third liquid inlet.

2. The water treatment system according to claim 1, characterized in that It includes a reflux pipe, the filter unit is provided with a third liquid outlet located downstream of the filter membrane, the liquid inlet end of the reflux pipe is connected to the third liquid outlet, and the liquid outlet end of the reflux pipe is connected to the first liquid inlet.

3. The water treatment system according to claim 1, characterized in that The filtration unit comprises a dissolved air releaser, which is located at the bottom of the filter membrane.

4. The water treatment system according to claim 1, characterized in that The gas-water mixing unit includes a gas-water mixing pump, and the first liquid inlet, the gas inlet, and the first liquid outlet are all provided on the gas-water mixing pump.

5. The water treatment system according to claim 4, characterized in that: The gas-water mixing unit includes an ozone generator, and the ozone generator is connected to the gas-water mixing pump through the gas inlet.

6. The water treatment system according to claim 4, characterized in that The gas-water mixing unit includes a water inlet tank, and the water inlet tank is connected to the gas-water mixing pump through the first liquid inlet.

7. The water treatment system according to claim 4, characterized in that The first liquid outlet and the second liquid inlet are connected through a first pipe, and a first flow meter is provided on the first pipe.

8. The water treatment system according to claim 1, characterized in that The boost tank is provided with a pressure gauge, and the pressure inside the boost tank is 0.2-0.3 MPa.

9. The water treatment system according to claim 1, wherein: The second liquid outlet is connected to the third liquid inlet via a second pipe. The second pipe is provided with a water inlet valve and a drain valve. The third liquid inlet is located between the water inlet valve and the drain valve.

10. The water treatment system according to claim 1, characterized in that It comprises a water production box, the water inlet of the water production box is connected to the water production outlet through a third pipe, and the third pipe is provided with a second flow meter.

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