Water purification system capable of relieving use pressure of filter membrane

Abstract

According to the technical scheme, the utility model provides the water purification system capable of relieving the use pressure of the filter membrane. Raw water is connected to one end of the front filter group, and the other end is connected to the cleaning loop; during water purification, raw water enters the booster pump after passing through the front filter group and then enters the membrane component to be filtered, at the moment, the water purification valve is opened, purified water enters the water storage equipment through the purified water pipeline, and mixed water of concentrated water and the raw water enters the front filter group through the concentrated water circulation pipeline, then enters the booster pump, is pressurized and then enters the membrane component to be circularly filtered; during cleaning, the purified water valve is closed, the first valve is opened, purified water separated from the membrane module flows into the booster pump again through the first valve, and the membrane module is washed by the purified water. The utility model has the advantages that the membrane component is flushed by arranging the flushing loop in the pipeline system, so that the use pressure of the membrane component is reduced, and the service life is prolonged. Concentrated water in the system can be independently discharged through the concentrated water circulation pipeline, and the pressure of the pipeline system is relieved.

Description

Technical Field

[0001] The utility model relates to the field of water purification, in particular to a water purification system for alleviating the use pressure of a filter membrane. Background Art

[0002] With the gradual popularization of direct drinking water purifiers, the application scope of reverse osmosis filtration technology has gradually expanded. Although reverse osmosis treatment technology has many advantages, it inevitably produces a part of concentrated water while producing purified water. This part of concentrated water is discharged in large quantities, causing a waste of water resources. In order to solve this problem, some technologies have attempted to use domestic water to achieve the purpose of discharging concentrated water, and have achieved certain results. However, once domestic water is not used, as the concentration of concentrated water continues to increase, the pressure of concentrated water on the membrane assembly increases, increasing the filtration pressure of the membrane assembly, which is not conducive to subsequent filtration. More seriously, the reverse osmosis membrane will quickly become blocked, resulting in a shortened service life. Therefore, how to provide a water purification system that can reduce the use pressure of the reverse osmosis membrane and achieve the purpose of protecting the reverse osmosis membrane has become an urgent problem to be solved. Utility Model Content

[0003] The utility model provides a water purification system for reducing the use pressure of a filter membrane, which is used to solve the problem that the reverse osmosis filtration pressure increases and the service life is shortened due to the gradual increase in the concentration of concentrated water.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a water purification system for reducing the use pressure of the filter membrane, including: a pre-filter group, a cleaning circuit, a concentrated water circulation pipeline and a clean water pipeline. The raw water is connected to the inlet end of the pre-filter group, and the outlet end of the pre-filter group is connected to the cleaning circuit; during water purification: the raw water enters the booster pump of the cleaning circuit after passing through the pre-filter group, and then enters the membrane assembly of the cleaning circuit to be filtered. At this time, the clean water valve is opened, and the separated clean water enters the water storage device through the clean water pipeline. The separated concentrated water enters the pre-filter group through the concentrated water circulation pipeline and the mixed water of the raw water, and then enters the booster pump, and enters the membrane assembly for circulation filtration after pressurization; during cleaning, the clean water valve is closed and the first valve is opened. At this time, the clean water separated by the membrane assembly flows back into it from the booster pump through the first valve, and the membrane assembly is rinsed with clean water.

[0005] As a preferred embodiment of the above technical solution, preferably, one end of the first valve is arranged on the pipeline between the front of the booster pump and the back of the pre-filter group, and the other end is arranged on the pipeline between the clean water outlet of the membrane assembly and the clean water pipeline.

[0006] As a preferred embodiment of the above technical solution, preferably, one end of the concentrated water circulation pipeline is connected to the concentrated water outlet of the membrane module, and the other end thereof is connected to the raw water.

[0007] As a preferred embodiment of the above technical solution, preferably, there is a concentrated water forced discharge component on the concentrated water circulation pipeline.

[0008] As a preferred embodiment of the above technical solution, preferably, the water purification pipeline includes a one-way solenoid valve and a high-pressure switch arranged in sequence, and the high-pressure switch is connected to a water storage device.

[0009] The technical solution of the utility model provides a water purification system that reduces the pressure of the filter membrane. Raw water is connected to one end of the pre-filter group, and the other end of the pre-filter group is connected to the cleaning circuit; during water purification: the raw water passes through the pre-filter group and enters the booster pump of the cleaning circuit, and then enters the membrane assembly of the cleaning circuit to be filtered. At this time, the water purification valve is opened, and the separated clean water enters the water storage device through the clean water pipeline, and the separated concentrated water enters the pre-filter group through the concentrated water circulation pipeline and the mixed water of the raw water, and then enters the booster pump, and enters the membrane assembly for circulation filtration after pressurization; during cleaning, the water purification valve is closed, and the first valve is opened. At this time, the clean water separated by the membrane assembly flows back into it from the booster pump through the first valve, and the membrane assembly is rinsed with clean water.

[0010] The utility model has the advantage that the backwashing loop is set in the pipeline system to flush the membrane assembly, which reduces the use pressure and prolongs the service life. The concentrated water circulation pipeline is set to discharge the concentrated water in the system separately, reducing the pressure of the pipeline system. Some of the remaining concentrated water can be mixed with the raw water and re-filtered, achieving the purpose of water saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The present invention is a schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0014] The pre-filter group is composed of a group of pre-filter devices connected in series, and the group can be one or more. The concentrated water circulation pipeline has a concentrated water forced discharge component, which is usually a flow limiting valve or a switch valve that can be completely closed and opened.

[0015] The technical solution provided by the utility model is now described. The pre-filter group 1 in the embodiment is described as an example in which three pre-filter devices (pre-filter device 101, pre-filter device 102 and pre-filter device 103) are provided. Figure 1 shown.

[0016] The utility model provides an embodiment, such as Figure 1 As shown, the cleaning circuit includes a first pipeline 4, a membrane assembly 5, a first valve 11 and a booster pump 3.

[0017] The water inlet of the pre-filter group 1 is connected to the raw water input pipeline 2, and the water flows into the booster pump 3 through the tee at the pipe node C after the pre-filtration. The water outlet of the booster pump 3 is connected to the water inlet of the membrane assembly 5 through the first pipe 4 for further filtering the water. The clean water outlet of the membrane assembly 5 is connected to the pressure barrel 8 and the clean water faucet 9 for storing clean water through the tee at the pipeline node B through a clean water valve 6 and a high-pressure switch 7 through a tee; the pipeline node B also connects the clean water outlet of the membrane assembly 5 with the water inlet of the booster pump 3 through the pipeline node C, so that the clean water filtered by the membrane assembly 5 can flow out from the clean water outlet and then flow back into the membrane assembly 5 through the pipeline node B-first valve 11-pipeline node C-boosting pump 3-first pipeline 4 in sequence, thereby forming a cleaning circuit to input clean water into the membrane assembly 5 for flushing.

[0018] The water purification pipeline is a passage consisting of a booster pump 3 - a first pipeline 4 - a membrane assembly 5 - a pipeline node B - a water inlet valve 6 - a high-pressure switch 7 - a pressure barrel 8 and a water purification tap 9.

[0019] Furthermore, a tee 12 and a solenoid valve 10 are provided in sequence between the concentrate outlet of the membrane assembly 5 and the water inlet of the pre-filter group 1. The tee 12 is connected to a concentrate flow limiting valve 13 for discharging concentrate. When the concentrate flow limiting valve 13 is opened, concentrate can be discharged.

[0020] This embodiment is now described in conjunction with specific usage:

[0021] When purifying water, the water purification valve 6 is opened: the raw water is pressurized by the booster pump 3 after passing through the pre-filtration group 1, and flows into the membrane assembly 5 through the first pipeline 4. After further filtration by the membrane assembly 5, the purified water flows out from the purified water outlet. The purified water flows into the pressure barrel 8 (water storage equipment) for storing purified water through the pipeline node B, the water purification valve 6 and the high-pressure switch 7 in sequence. The user turns on the water purification tap 9 to obtain direct drinking water. The first valve 11 is closed during the process of using direct drinking water.

[0022] When cleaning is required, the clean water valve 6 is closed and the first valve 11 is opened, and the pressure tank 8 and the drinking water tap 9 are temporarily not working, so that the direct drinking water (clean water) flows from the pipeline node B to the pipeline node C and enters the membrane assembly 5 through the booster pump 3, thereby achieving the purpose of cleaning the membrane assembly 5 with clean water, thereby reducing the internal filtration pressure.

[0023] During water purification, the concentrated water flow limiting valve 13 is always open, but the flow rate is limited to a small amount, and the concentrated water is slowly discharged. The concentrated water that is not discharged is always opened by the electromagnetic valve 10. Figure 1 The pipeline shown (the pipeline on the left side of the solenoid valve 10 in the figure) is mixed with raw water to dilute the concentration and then filtered again to achieve the purpose of circulating filtration. When the concentrated water pressure is large, the concentrated water limiting valve 13 can be opened to the maximum flow limit to quickly discharge the concentrated water from the pipeline system.

[0024] in, Figure 1 The TCR in the middle is the TCR filter element.

[0025] The technical solution of the utility model can flush the membrane assembly by opening / closing the water purification valve 6, which reduces the use pressure (filtration pressure) of the membrane assembly, can effectively protect the filter membrane in the membrane assembly, and thus prolong its service life. The concentrated water circulation pipeline and corresponding components are set up to discharge the concentrated water in the system separately, reduce the concentrated water pressure in the pipeline system, and the remaining concentrated water (less) can be mixed with the raw water and re-filtered, thereby achieving the purpose of water saving. Among them, since the membrane assembly in the utility model can be flushed with clean water, the concentrated water diluted by the raw water can be filtered again, achieving the purpose of reusing part of the concentrated water and thus saving water.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A water purification system for reducing the use pressure of a filter membrane, characterized in that: include: Pre-filter group, cleaning circuit, concentrated water circulation pipeline and clean water pipeline, The raw water is connected to one end of the pre-filter group, and the other end of the pre-filter group is connected to the cleaning circuit; During water purification: the raw water enters the booster pump of the cleaning circuit after passing through the pre-filter group, and then enters the membrane assembly of the cleaning circuit to be filtered. At this time, the water purification valve is opened, and the separated clean water enters the water storage device through the clean water pipeline. The separated concentrated water enters the pre-filter group through the concentrated water circulation pipeline and the mixed water of the raw water, and then enters the booster pump, and enters the membrane assembly for circulation filtration after being pressurized; During cleaning, the clean water valve is closed and the first valve is opened. At this time, the clean water separated by the membrane assembly flows back into the membrane assembly from the booster pump through the first valve, and the membrane assembly is flushed with the clean water.

2. The water purification system for reducing the use pressure of the filtration membrane according to claim 1, characterized in that: One end of the first valve is arranged on the pipeline between the front of the booster pump and the back of the pre-filter group, and the other end is arranged on the pipeline between the clean water outlet of the membrane assembly and the clean water pipeline.

3. The water purification system for reducing the use pressure of the filtration membrane according to claim 1, characterized in that: One end of the concentrated water circulation pipeline is connected to the concentrated water outlet of the membrane module, and the other end thereof is connected to the raw water.

4. The water purification system for reducing the use pressure of the filtration membrane according to claim 3, characterized in that: The concentrated water circulation pipeline is provided with a concentrated water forced discharge component.

5. The water purification system for reducing the use pressure of the filtration membrane according to claim 1, characterized in that: The water purification pipeline comprises a one-way solenoid valve and a high-pressure switch which are arranged in sequence, and the high-pressure switch is connected to the water storage device.

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