Separation device for short-process salt-containing wastewater

Abstract

The utility model discloses a separation device for short-process salt-containing wastewater, which relates to the technical field of water treatment equipment and comprises a water delivery pipeline, and a high-pressure pump is arranged on the water delivery pipeline and used for increasing the pressure of raw water in the water delivery pipeline. The filtering assembly is connected with the water conveying pipeline, and the filtering assembly is used for filtering raw water. Wherein a nanofiltration membrane is used as a filtering piece in the filtering assembly. According to the utility model, the high-pressure ozone dissolving technology is introduced, the pressure of the raw water is controlled, the dissolving concentration of the ozone is improved, the partial pressure of the ozone in a gas phase is improved under the high-pressure condition, and the concentration of the ozone dissolved in the raw water is improved to multiple times of that of the conventional ozone. The high-concentration ozone aqueous solution greatly improves the oxidative degradation effect of ozone on organic matters, so that organic pollutants in the wastewater can be more quickly and thoroughly removed.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, specifically a separation device for short-process saline wastewater. Background Technology

[0002] Hollow fiber nanofiltration membrane is an advanced membrane separation technology. Its core lies in using hollow fiber nanofiltration membranes as the separation medium to achieve efficient and precise separation. This technology boasts significant advantages such as high separation efficiency, low energy consumption, ease of operation, and strong environmental friendliness, and is widely used in water treatment, food, chemical, and pharmaceutical industries.

[0003] However, there are many types of pollutants in water bodies, and nanofiltration membranes have low efficiency in treating organic matter in water bodies. Organic matter in water bodies easily adheres to the surface of nanofiltration membranes, which not only leads to clogging of nanofiltration membrane pores and reduces the service life of nanofiltration membranes, but also reduces the wastewater treatment efficiency. Utility Model Content

[0004] This utility model addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the purpose of this utility model is to provide a separation device for short-process saline wastewater, thereby solving the problems mentioned in the background art, such as the low efficiency of nanofiltration membranes in treating organic matter in water, the easy adhesion of organic matter to the surface of nanofiltration membranes, which not only leads to clogging of nanofiltration membrane pores and reduces the service life of nanofiltration membranes, but also reduces the wastewater treatment efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a separation device for short-process saline wastewater, comprising:

[0006] A water supply pipeline, on which a high-pressure pump is installed, the high-pressure pump being used to increase the pressure of the raw water in the water supply pipeline;

[0007] A filter assembly connected to the water supply pipeline, the filter assembly being used to filter the raw water;

[0008] The filtration assembly uses a nanofiltration membrane as the filter element.

[0009] A mixer and an ozone generator are also provided between the filter assembly and the high-pressure pump. The mixer connects the output end of the ozone generator to the water supply pipeline. The mixer is used to mix and dissolve ozone in the raw water in the water supply pipeline.

[0010] Preferably, the filtration assembly includes a housing, a water purification pipe is disposed in the middle of the housing, and a nanofiltration membrane is disposed between the peripheral wall of the water purification pipe and the housing.

[0011] Preferably, the mixer includes a venturi tube, with both ends of the venturi tube connected to the water supply pipe and the housing, respectively, and the outlet of the ozone generator connected to the throat of the venturi tube.

[0012] Preferably, a first pressure reducing valve is connected to one end of the housing near the mixer.

[0013] Preferably, a drain pipe is connected to the end of the water purification pipe away from the mixer, and a second pressure reducing valve is installed on the drain pipe.

[0014] Preferably, pressure monitoring sensors are installed in the water supply pipe, the rear side of the mixer, and inside the drain pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this invention, by introducing high-pressure ozone dissolution technology, the pressure of the raw water is controlled, increasing the dissolved concentration of ozone. The high-pressure condition increases the partial pressure of ozone in the gas phase, thereby increasing the concentration of ozone dissolved in the raw water to several times that of conventional methods. The high-concentration ozone aqueous solution greatly improves the oxidative degradation effect of ozone on organic matter, enabling organic pollutants in wastewater to be removed more quickly and thoroughly.

[0017] 2. In this invention, a pressure-reducing valve is used within the filter assembly to rapidly lower the water pressure, causing ozone to be released inside the filtration device, forming micro-nano bubbles. These micro-nano bubbles have a strong flushing effect, enabling efficient automatic flushing and cleaning of the hollow fiber nanofiltration membrane. Simultaneously, the oxidizing properties of ozone degrade organic pollutants on the membrane surface, achieving membrane self-regeneration. This not only avoids membrane clogging but also significantly extends the membrane's lifespan and reduces maintenance costs.

[0018] 3. In this invention, the pressure of the produced water in the drain pipe is further reduced by the second pressure reducing valve, causing ozone to be released from the concentrated water discharged from the filter assembly, forming a large number of micro-nano bubbles. These micro-nano bubbles, due to their extremely high specific surface area, greatly improve the mass transfer efficiency of ozone dissolving in water, thereby further enhancing the oxidative degradation capacity of ozone. Simultaneously, the presence of micro-nano bubbles also extends the reaction time of the entire system, ensuring that organic pollutants in the filtered concentrated water can be fully oxidized and degraded. This not only improves the efficiency of wastewater treatment but also ensures the thoroughness of wastewater treatment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the mixer in this utility model.

[0021] In the picture:

[0022] 1. Water supply pipeline; 2. High-pressure pump; 3. Ozone generator;

[0023] 4. Mixer, 401 throat segment;

[0024] 5. Filter assembly, 501 housing, 502 nanofiltration membrane, 503 water purification pipe;

[0025] 6. First pressure reducing valve;

[0026] 7. Drain pipe, 702. Second pressure reducing valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1 As shown, this utility model provides a technical solution: a separation device for short-process saline wastewater, comprising:

[0029] A water supply pipeline 1, used to transport raw water, is equipped with a high-pressure pump 2. The high-pressure pump 2 increases the pressure of the raw water within the pipeline 1. This high pressure increases the partial pressure of ozone in the subsequent gas phase, thereby increasing the concentration of ozone dissolved in the raw water to several times the normal level (according to Henry's Law). This high-concentration ozone solution significantly enhances the oxidative degradation effect of ozone on organic matter, enabling the removal of organic pollutants from wastewater more quickly and thoroughly.

[0030] Filter assembly 5 is connected to water supply pipe 1 and is used to filter raw water.

[0031] In the filter assembly 5, a nanofiltration membrane 502 is used as the filter element.

[0032] A mixer 4 and an ozone generator 3 are also provided between the filter assembly 5 and the high-pressure pump 2. The mixer 4 connects the output end of the ozone generator 3 to the water supply pipe 1. The mixer 4 is used to mix and dissolve ozone in the raw water in the water supply pipe 1. By dissolving ozone, the decomposition efficiency of organic matter in the raw water is improved, thereby avoiding the clogging of the nanofiltration membrane pores by organic matter.

[0033] In this embodiment, the filter assembly 5 includes a housing 501, a water purification pipe 503 is provided in the middle of the housing 501, a plurality of micropores are provided on the peripheral wall of the water purification pipe 503, and a nanofiltration membrane 502 is provided between the peripheral wall of the water purification pipe 503 and the housing 501.

[0034] Raw water enters the shell 501 through one end. Under the pressure of the high-pressure water itself, the water passes through the nanofiltration membrane and micropores and enters the purified water pipe 503, where impurities are intercepted by the nanofiltration membrane.

[0035] In this embodiment, the mixer 4 includes a venturi tube, the two ends of which are connected to the water supply pipe 1 and the housing 501, respectively, and the outlet of the ozone generator 3 is connected to the throat section 401 of the venturi tube.

[0036] The Venturi mixer utilizes a constriction section design, where the fluid accelerates and its pressure decreases before passing through an expansion section, converting kinetic energy into static pressure energy. During this process, surrounding fluid is drawn into the constriction section, thus achieving the effect of mixing raw water with ozone.

[0037] In this embodiment, a first pressure reducing valve 6 is connected to one end of the housing 501 near the mixer 4. The pressure reducing valve causes a sudden drop in pressure at the raw water inlet of the housing 501, thereby causing the ozone dissolved in the raw water to precipitate and form micro-nano-scale bubbles. The micro-nano-scale bubbles have a high specific surface area and a long residence time, which enhances the contact efficiency between ozone and organic pollutants and washes away impurities on the surface of the nanofiltration membrane.

[0038] In this embodiment, a drain pipe 7 is connected to the end of the water purification pipe 503 furthest from the mixer 4. A second pressure reducing valve 702 is installed on the drain pipe 7, causing ozone to be released from the concentrated water discharged from the filter assembly 5, forming a large number of micro-nano bubbles. These micro-nano bubbles, due to their extremely high specific surface area, greatly improve the mass transfer efficiency of ozone dissolving in water, thereby further enhancing the oxidative degradation ability of ozone. Simultaneously, the presence of micro-nano bubbles also extends the reaction time of the entire system, ensuring that organic pollutants in the filtered concentrated water can be fully oxidized and degraded. This not only improves the efficiency of wastewater treatment but also ensures the thoroughness of wastewater treatment.

[0039] The first pressure reducing valve 6 and the second pressure reducing valve 701 mentioned above can be multi-stage pressure reducing valves to reduce pressure in stages and avoid excessive instantaneous pressure difference that could cause bubbles to merge.

[0040] In this embodiment, pressure monitoring sensors are installed in the water supply pipe 1, the rear side of the mixer 4, and the drain pipe 7, so that the water pressure in each pipe can be monitored in real time.

[0041] Working Principle: When using this separation device for short-process saline wastewater, high-pressure ozone dissolution technology is first introduced through high-pressure pump 2. This controls the pressure of the raw water and increases the dissolved ozone concentration. The high pressure increases the partial pressure of ozone in the gas phase, thereby increasing the ozone concentration dissolved in the raw water to several times the conventional level. This high-concentration ozone solution significantly enhances the oxidative degradation effect of ozone on organic matter, enabling faster and more thorough removal of organic pollutants from the wastewater.

[0042] Utilizing dissolved ozone in the raw water, a pressure-reducing valve within the housing 501 rapidly lowers the water pressure, causing the ozone to be released inside the filtration device, forming micro-nano bubbles. These micro-nano bubbles possess a powerful flushing effect, automatically and efficiently cleaning the hollow fiber nanofiltration membrane. Simultaneously, the oxidizing properties of ozone degrade organic pollutants on the membrane surface, enabling membrane self-regeneration. This not only avoids membrane clogging but also significantly extends membrane lifespan and reduces maintenance costs.

[0043] The pressure of the produced water in the drain pipe 7 is further reduced by the second pressure reducing valve, causing ozone to be released from the concentrated water discharged from the filter assembly 5, forming a large number of micro-nano bubbles. These micro-nano bubbles, due to their extremely high specific surface area, greatly improve the mass transfer efficiency of ozone dissolving in water, thereby further enhancing the oxidative degradation capacity of ozone. Simultaneously, the presence of micro-nano bubbles also extends the reaction time of the entire system, ensuring that organic pollutants in the filtered concentrated water can be fully oxidized and degraded. This not only improves the efficiency of wastewater treatment but also ensures the thoroughness of wastewater treatment.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A separation device for short-process saline wastewater, characterized in that, include: A water supply pipeline (1) is provided with a high-pressure pump (2), which is used to increase the pressure of the raw water in the water supply pipeline (1); A filter assembly (5) is connected to the water supply pipe (1) and is used to filter the raw water. The filter assembly (5) uses a nanofiltration membrane (502) as the filter element. A mixer (4) and an ozone generator (3) are also provided between the filter assembly (5) and the high-pressure pump (2). The mixer (4) connects the output end of the ozone generator (3) to the water supply pipe (1). The mixer (4) is used to mix and dissolve ozone in the raw water in the water supply pipe (1).

2. The separation device for short-process saline wastewater according to claim 1, characterized in that: The filtration assembly (5) includes a housing (501), a water purification pipe (503) is provided in the middle of the housing (501), and a nanofiltration membrane (502) is provided between the peripheral wall of the water purification pipe (503) and the housing (501).

3. The separation device for short-process saline wastewater according to claim 2, characterized in that: The mixer (4) includes a venturi tube, the two ends of which are connected to the water supply pipe (1) and the housing (501) respectively, and the outlet of the ozone generator (3) is connected to the throat section (401) of the venturi tube.

4. A separation device for short-process saline wastewater according to claim 2, characterized in that: A first pressure reducing valve (6) is connected to one end of the housing (501) near the mixer (4).

5. A separation device for short-process saline wastewater according to claim 2, characterized in that: A drain pipe (7) is connected to the end of the water purification pipe (503) away from the mixer (4), and a second pressure reducing valve (702) is installed on the drain pipe (7).

6. A separation device for short-process saline wastewater according to claim 5, characterized in that: Pressure monitoring sensors are installed on the back side of the water supply pipe (1), the mixer (4), and the drain pipe (7).

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