Off-line RO membrane cleaning machine

Abstract

The utility model relates to an off-line RO (reverse osmosis) membrane cleaning machine which comprises a square cleaning water tank with an open top end, and chemical cleaning liquid is contained in the cleaning water tank; the flushing device is placed in the cleaning water tank and comprises an inflow pipeline, a membrane element, an aeration releaser and a backflow pipeline, the inflow pipeline comprises an air inlet pipeline, a liquid inlet pipeline and a first branch pipeline, and the air inlet end of the air inlet pipeline penetrates out of the cleaning water tank and then is communicated with an air compressor; the input end of the liquid inlet pipeline penetrates out of the cleaning water tank and then is communicated with the chemical cleaning pump, a suction pipeline of the chemical cleaning pump is communicated with the cleaning water tank, a first branch pipeline is communicated with the aeration releaser, one end of the membrane element is fixedly installed at the top end of the aeration releaser, and the other end of the membrane element is communicated with the backflow pipeline. And the tail end pipeline of the backflow pipeline extends below the liquid level of the chemical cleaning liquid in the cleaning water tank.

Description

Technical Field

[0001] The utility model relates to a cleaning device, in particular to an offline RO membrane cleaning machine. Background Art

[0002] During the use of reverse osmosis equipment, fouling is inevitable. When the influent water quality is complex, the pollutants carried are more likely to remain on the membrane elements, resulting in poor cleaning effect or inability to clean during the cleaning process. The reason is that the membrane elements are blocked by some suspended solids, microorganisms, organic matters and concentrated precipitates, resulting in poor water flow through the flow channels and a smooth surface of the desalination layer, which brings difficulties to the cleaning of the membrane elements, and in some cases, directly causes the membrane elements to be scrapped. Content of the Utility Model

[0003] The main purpose of the utility model is to provide an offline RO membrane cleaning machine, which can effectively clean and remove the pollutants on the membrane elements by physical, chemical and other methods, and solve the inconvenience brought by serious membrane fouling to production and the resource utilization of production costs.

[0004] To achieve the above object, the utility model provides an offline RO membrane cleaning machine, comprising:

[0005] A cleaning water tank, which is square and open at the top, and contains a chemical cleaning solution.

[0006] A flushing device placed in the cleaning water tank, the flushing device includes an influent pipeline, a membrane element, an aeration release device and a reflux pipeline. The influent pipeline includes an air inlet pipeline, a liquid inlet pipeline and a first branch pipeline. The air inlet end of the air inlet pipeline passes through the cleaning water tank and is connected to an air compressor. The input end of the liquid inlet pipeline passes through the cleaning water tank and is connected to a chemical cleaning pump. The suction pipeline of the chemical cleaning pump is connected to the cleaning water tank. The first branch pipeline is connected to the aeration release device. One end of the membrane element is fixedly installed at the top of the aeration release device, and the other end of the membrane element is connected to the reflux pipeline. The end pipeline of the reflux pipeline extends below the liquid level of the chemical cleaning solution in the cleaning water tank.

[0007] Preferably, a filter screen is provided in the cleaning water tank. The two sides of the filter screen are slidably connected to the corresponding two side walls of the cleaning water tank, and the filter screen is close to the suction pipeline.

[0008] Preferably, a water outlet pipe is provided on the side wall of the cleaning water tank close to the suction pipeline, and the liquid inlet end of the water outlet pipe is lower than the liquid level of the chemical cleaning solution.

[0009] Preferably, the reflux pipeline further includes a reflux branch pipe, one end of the reflux branch pipe is connected to the membrane element, and the other end of the reflux branch pipe is connected to the end pipeline.

[0010] Preferably, an ultrasonic generator is fixedly installed at the bottom of the cleaning water tank.

[0011] The beneficial effects of the present utility model are as follows:

[0012] In the present utility model, the air compressor and the chemical cleaning pump share the same pipeline, so that air bubbles are incorporated into the liquid in the pipeline, and then the air bubbles in the liquid are released into the membrane element through the aeration release device. In this way, when part of the flow channels are blocked due to severe fouling of the membrane element and the cleaning liquid cannot enter, resulting in poor cleaning effect, the good fluidity of the gas is utilized to pre-unblock the flow channels in the membrane element, enabling the cleaning liquid to enter the flow channels, thereby achieving the purpose of deep cleaning of the membrane element.

[0013] Regarding the pollution adhering to the membrane surface and having a relatively smooth surface, after the air bubbles enter the membrane element along with the cleaning liquid, they will collide back and forth on the inner membrane surface, and the cleaning liquid will exhibit a turbulent phenomenon with a more concentrated scouring effect, physically removing the surface pollutants, such as pollutants with poor solubility like calcium fluoride. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0015] Figure 1 is a three-dimensional structural schematic diagram of the offline RO membrane cleaning machine of the present utility model;

[0016] Figure 2 is a structural schematic diagram of another angle of the offline RO membrane cleaning machine of the present utility model;

[0017] Figure 3 is a structural schematic diagram of the interior of the offline RO membrane cleaning machine of the present utility model.

[0018] DESCRIPTION OF THE REFERENCE NUMERALS

[0019] 100, cleaning water tank; 110, water outlet pipe;

[0020] 200, filter screen;

[0021] 310, air inlet pipe; 320, liquid inlet pipe; 330, aeration release device;

[0022] 340, membrane element; 350, return branch pipe; 360, end pipe;

[0023] 370, first branch pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Many specific details are set forth in the following description in order to fully understand the present utility model, but the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0025] As Figure 1 and Figure 2 shown, this embodiment provides an offline RO membrane cleaning machine, including a cleaning water tank 100 and a flushing device. Among them, the flushing device is placed in the cleaning water tank 100, and the chemical cleaning liquid flowing out of the flushing device is stored in the cleaning water tank 100, and the chemical cleaning liquid in the cleaning water tank 100 is drawn back into the flushing device through a chemical cleaning pump, thereby completing the recycling of the chemical cleaning liquid. In addition, an air compressor is provided outside the cleaning water tank 100. Bubbles are added to the flushing device through the air compressor, and then released through the flushing device. Thus, by utilizing the characteristic that the fluidity of gas is better than that of liquid, the flow channels in the membrane element 340 are pre-unblocked, so that the cleaning liquid can enter the flow channels, thereby achieving the purpose of deep cleaning of the membrane element 340, and solving the problem that the flow channels are blocked when the membrane element 340 is severely fouled, resulting in the inability of the cleaning chemical liquid to flow in the membrane element 340.

[0026] Specifically, in this embodiment, the cleaning water tank 100 is a square box with an open top. The cleaning water tank 100 can hold chemical cleaning liquid. Therefore, it is necessary to ensure the sealing performance inside the cleaning water tank 100 to prevent the leakage of chemical cleaning liquid.

[0027] In this embodiment, as Figures 1 to 3As shown, the flushing device includes an influent pipeline, a membrane element 340, an aeration releaser 330, and a reflux pipeline. The influent pipeline includes an air inlet pipeline 310, a liquid inlet pipeline 320, and a first branch pipeline 370. The air inlet end of the air inlet pipeline 310 penetrates through the cleaning water tank 100 and is connected to an air compressor. The input end of the liquid inlet pipeline 320 penetrates through the cleaning water tank 100 and is connected to a chemical cleaning pump. The suction pipeline (not shown in the figure) of the chemical cleaning pump is connected to the cleaning water tank 100. The first branch pipeline 370 is connected to the aeration releaser 330. One end of the membrane element 340 is fixedly installed at the top of the aeration releaser 330. The other end of the membrane element 340 is connected to the reflux pipeline. The end pipeline 360 of the reflux pipeline extends below the liquid level of the chemical cleaning liquid in the cleaning water tank 100. Additionally, the reflux pipeline further includes a reflux branch pipe 350. One end of the reflux branch pipe 350 is connected to the membrane element 340, and the other end of the reflux branch pipe 350 is connected to the end pipeline 360. Among them, in this embodiment, multiple membrane elements 340 and aeration releasers 330 can be provided. At this time, it is necessary to match and install each membrane element 340 with the aeration releaser 330. It should be noted that valves can be respectively provided on the air inlet pipeline 310 and the liquid inlet pipeline 320 to control the flow rates of gas and chemical cleaning liquid according to actual situations, so as to better flush the membrane element 340.

[0028] Preferably, in this embodiment, a water outlet pipe 110 is provided on the side wall of the cleaning water tank 100 close to the suction pipeline. The suction pipeline is connected to the water outlet pipe 110. The liquid inlet end of the water outlet pipe 110 is lower than the liquid level of the chemical cleaning liquid, thereby preventing impurities floating on the surface of the chemical cleaning liquid from entering the chemical cleaning pump. For example, it can prevent poorly soluble pollutants such as calcium fluoride from entering the circulating flushing process.

[0029] In this embodiment, a filter screen 200 is provided in the cleaning water tank 100. Both sides of the filter screen 200 are slidably connected to the corresponding two side walls of the cleaning water tank 100, and the filter screen 200 is close to the suction pipeline. Preferably, sliding grooves are respectively provided on the corresponding two side walls of the cleaning water tank 100. The sliding grooves can be set according to actual needs. Both sides of the filter screen 200 are slidably connected to the sliding grooves. The filter screen 200 isolates particulate impurities on the side far from the water outlet pipe 110.

[0030] In this embodiment, an ultrasonic generator is fixedly installed at the bottom of the cleaning tank. At the same time, the huge impact brought by the rupture of ultrasonic bubbles is used to oscillate and break the inside of the membrane element 340. In this way, the membrane element 340 to be cleaned is ultrasonically cleaned and soaked to improve the cleaning efficiency.

[0031] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

Claims

1. An offline RO membrane cleaning machine, characterized in that, Comprising: A cleaning water tank, the cleaning water tank is square and open at the top, and a chemical cleaning solution is contained in the cleaning water tank; A flushing device, the flushing device is placed in the cleaning water tank, the flushing device includes an inflow pipeline, a membrane element, an aeration release device and a reflux pipeline, the inflow pipeline includes an air intake pipeline, a liquid inlet pipeline and a first branch pipeline, the air intake end of the air intake pipeline passes through the cleaning water tank and is connected to an air compressor, the input end of the liquid inlet pipeline passes through the cleaning water tank and is connected to a chemical cleaning pump, the suction pipeline of the chemical cleaning pump is connected to the cleaning water tank, the first branch pipeline is connected to the aeration release device, one end of the membrane element is fixedly installed at the top of the aeration release device, the other end of the membrane element is connected to the reflux pipeline, and the end pipeline of the reflux pipeline extends below the liquid level of the chemical cleaning solution in the cleaning water tank.

2. The offline RO membrane cleaning machine according to claim 1, characterized in that, A filter screen is provided in the cleaning water tank, both sides of the filter screen are slidably connected to the corresponding two side walls of the cleaning water tank, and the filter screen is close to the suction pipeline.

3. The offline RO membrane cleaning machine according to claim 1, characterized in that, A water outlet pipe is provided on the side wall of the cleaning water tank close to the suction pipeline, and the liquid inlet end of the water outlet pipe is lower than the liquid level of the chemical cleaning solution.

4. An offline RO membrane cleaning machine according to claim 1, characterized in that, The reflux pipeline further includes a reflux branch pipe, one end of the reflux branch pipe is connected to the membrane element, and the other end of the reflux branch pipe is connected to the end pipeline.

5. An offline RO membrane cleaning machine according to claim 1, characterized in that, An ultrasonic generator is fixedly installed at the bottom of the cleaning water tank.

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