Water purification treatment integrated equipment for micro-polluted source water

Abstract

The utility model discloses micro-polluted water source water purification treatment integrated equipment which comprises a laminated filter, a raw water pump is connected onto the laminated filter, and the raw water pump is connected with a micro-polluted water source; the laminated filter is further connected with a pipeline mixer, the pipeline mixer is connected with an ozone generator and an ultrafiltration membrane assembly, the ultrafiltration membrane assembly is connected with a middle water tank, the middle water tank is connected with a clean water pump and the ozone generator, and the clean water pump is connected with a clean water storage part; the middle water tank is also connected with a backwashing pump, the backwashing pump is connected with a first jet device and a laminated filter, the first jet device is connected with an ultrafiltration membrane assembly, the ultrafiltration membrane assembly is connected with a waste liquid neutralization tank, and the waste liquid neutralization tank is connected with a raw water pump; according to the equipment, water in a micro-polluted water source is filtered through the laminated filter and the ultrafiltration membrane assembly, and in the filtering process, ozone is introduced to oxidize and disinfect pollutants in the water of the micro-polluted water source, so that the situation that chemical sludge is generated by using a flocculating agent and the environment is damaged is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment equipment technical field, especially in a kind of micro-polluted water source water purification treatment integrated equipment. BACKGROUND

[0002] The types and amounts of impurities contained in water sources in different regions are different. That is, for the same water source, as it flows through different regions and changes over time, the impurities in the water source also change in composition and content. Generally speaking, when a water source contains a large number of pollutants with complex properties but low concentrations, it is commonly referred to as micro-polluted water source water, i.e., micro-polluted water.

[0003] With the development of China's economy and the increasing concentration and increase of urban population, many rivers and lakes have been polluted to some extent, and the water sources in rivers and lakes have become micro-polluted water, losing their function and role as drinking water sources. Under the current situation of severe water shortage, micro-polluted water source water will still be an important water source. The new "Drinking Water Health Standards" (GB5749-2006) of China has specific requirements for water body bacteria and turbidity exceeding the standards; at present, water resources exceeding the indicators specified in the manual need to be purified before use, and the existing purification of micro-polluted water source water usually adopts a coagulation and sedimentation treatment process route, and then introduces micro-polluted water into the process route for treatment. However, the water treatment process route mainly based on coagulation and sedimentation can purify micro-polluted water source water, but in the process route, a flocculating agent needs to be used as a reagent to treat some pollutants in the micro-polluted water source water. During the treatment process, the flocculating agent will produce chemical sludge with the pollutants in the micro-polluted water source water. These chemical sludge needs to be discharged in a certain area, and the pollutants in the discharged chemical sludge will enter the water source in the discharge area, polluting the water resources in the nearby area again. Moreover, after a certain period of time of treating micro-polluted water resources, some equipment in the process route needs to be chemically cleaned online to restore the initial effect of the equipment. However, chemical cleaning will produce corresponding chemical wastewater, which will be discharged into the environment, causing environmental pollution. SUMMARY

[0004] The main purpose of the utility model is to provide a micro-polluted water source water purification treatment integrated equipment, which solves the problem of chemical sludge treatment difficulty caused by the coagulation and sedimentation process route of the water purification equipment mentioned in the background technology, and the chemical wastewater produced during cleaning of the equipment easily causes environmental pollution.

[0005] In order to achieve the above object, the utility model adopts the technical scheme for: a kind of micro-polluted water source water purification treatment integrated equipment, including laminated filter, the first water inlet of laminated filter is connected with the water outlet of raw water pump by pipeline, the water inlet of raw water pump is connected with micro-polluted water source by pipeline;The water outlet of laminated filter is connected with the water inlet of pipeline mixer by pipeline, the gas outlet of ozone generator is connected with the air inlet of pipeline mixer by pipeline, the first water inlet of ultrafiltration membrane assembly is connected with the water outlet of pipeline mixer by pipeline, the water outlet of intermediate water pool is connected with the water inlet of clear water pump by pipeline, the water inlet of intermediate water pool is connected with the gas outlet of ozone generator by pipeline, the water inlet of clear water storage is connected with the water outlet of clear water pump by pipeline;

[0006] The water outlet of intermediate water pool is connected with the water inlet of backwash pump by pipeline, the water outlet of backwash pump is connected with the water inlet of first jetifier and the second water inlet of laminated filter by pipeline, the water outlet of first jetifier is connected with the second water inlet of ultrafiltration membrane assembly by pipeline, the water outlet of waste liquid neutralization tank is connected with the water inlet of ultrafiltration membrane assembly by pipeline, the water inlet of raw water pump is connected with the water outlet of waste liquid neutralization tank by pipeline;

[0007] One electric valve is respectively installed on the connecting pipeline of ultrafiltration membrane assembly and intermediate water pool, the connecting pipeline of ultrafiltrution membrane assembly and waste liquid neutralization tank, the connecting pipeline of intermediate water pool and backwash pump, the connecting pipeline of intermediate water pool and clear water pump.

[0008] Further, the water outlet of intermediate water pool is connected with the water inlet of booster pump by pipeline, the water inlet of nanofiltration membrane assembly is connected with the water outlet of booster pump by pipeline, the water outlet of nanofiltration membrane assembly is connected with the water inlet of clear water pump by pipeline, one electric valve is respectively installed on the connecting pipeline of intermediate water pool and booster pump, the connecting pipeline of nanofiltration membrane assembly and clear water pump.

[0009] Further, the water outlet of backwash pump is connected with the water inlet of second jetifier by pipeline, the water outlet of second jetifier is connected with the second water inlet of nanofiltration membrane assembly by pipeline, the water outlet of nanofiltration membrane assembly is connected with the water inlet of waste liquid neutralization tank by pipeline, the air inlet of second jetifier is connected with the gas outlet of ozone generator by pipeline;One electric valve is respectively installed on the connecting pipeline of second jetifier and nanofiltration membrane assembly, the connecting pipeline of nanofiltration membrane assembly and waste liquid neutralization tank.

[0010] Further, the air inlet of the ultrafiltration membrane assembly is connected with the air outlet of the air compressor through a pipeline.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The device filters the water in the micro-polluted water source through the laminated filter and the ultrafiltration membrane assembly, and in the filtering process, ozone is introduced to oxidize and disinfect the pollutants in the micro-polluted water source, so that some micro-polluted water meets the standard of the national "Drinking Water Health Standards" (GB5749-2006), when the water quality is poor, the content of multivalent ions (such as calcium, magnesium, etc.) is not high or the content of organic matter does not meet the standard, the nanofiltration membrane assembly is further used for filtering, and in the process of purifying the water source, no flocculating agent is used, so that no chemical sludge is generated in the process of purifying the water source, and the use of the flocculating agent to generate the chemical sludge and damage the environment is avoided.

[0013] 2. In the device, when the ultrafiltration membrane assembly and the nanofiltration membrane assembly are chemically cleaned, the water in the intermediate water tank is delivered to the first jet device and the second jet device through the backwashing pump, ozone is introduced into the first jet device and the second jet device to mix with the water therein to form ozone cleaning liquid, then the ozone cleaning liquid is introduced into the ultrafiltration membrane assembly and the nanofiltration membrane assembly to perform chemical cleaning, the waste liquid generated in the cleaning process is neutralized in the waste liquid neutralization tank, and after the cleaning is completed, the liquid in the waste liquid neutralization tank is delivered to the purification circuit to be purified through the raw water pump, the generation of chemical waste liquid in the cleaning process using the flocculating agent is avoided, and the pollution of the chemical waste liquid to the environment is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a process flow chart of a micro-polluted water source water purification treatment integrated device.

[0015] Figure 2 It is a structural schematic view of a micro-polluted water source water purification treatment integrated device.

[0016] In the drawing: 1, micro-polluted water source; 2, raw water pump; 3, laminated filter; 4, pipeline mixer; 5, ozone generator; 6, ultrafiltration membrane assembly; 7, air compressor; 8, waste liquid neutralization tank; 9, backwashing pump; 10, first jet device; 11, intermediate water tank; 12, booster pump; 13, nanofiltration membrane assembly; 14, clean water pump; 15, clean water storage; 16, second jet device; 17, electric valve. DETAILED DESCRIPTION

[0017] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0018] Referring to Figures 1-2The embodiment discloses a kind of micro-polluted water source water purification treatment integrated equipment, the first water inlet of the laminated filter 3 is connected with the water outlet of raw water pump 2 using water pipe, the water inlet of raw water pump 2 is connected with micro-polluted water source 1 using water pipe, and the micro-polluted water in micro-polluted water source 1 is transported to laminated filter 3 by raw water pump 2 to carry out the filtration of first step, remove active sludge, algae, macromolecular polymer and bacteria etc. Large particle impurities in micro-polluted water, and protect subsequent filtration equipment, avoid that large particle impurities in micro-polluted water are blocked or scratched subsequent filtration equipment, the water outlet of laminated filter 3 is connected with the water inlet of pipeline mixer 4 using water pipe, and the gas inlet of pipeline mixer 4 is connected with the gas outlet of ozone generator 5 using gas guide pipe, and the ozone generator 5 in the embodiment is electrolytic by cold dryer and oxygen generator and is taken ozone, and the amount of ozone that is input into pipeline mixer 4 is 1.0-2.5mg / L;Micro-polluted water treated by laminated filter 3 is mixed with input ozone in pipeline mixer 4, oxidizes micro-pollutant in micro-polluted water, and forms ozone microbubble water;The water outlet of pipeline mixer 4 is connected with the first water inlet of ultrafiltration membrane assembly 6 using water pipe, and the colloid and virus etc. Pollutants in ozone microbubble water body that is transported to it by pipeline mixer 4 are removed by ultrafiltration membrane assembly 6, and the water outlet of ultrafiltration membrane assembly 6 is connected with the water inlet of intermediate water pool 11 using water pipe, and intermediate water pool 11 is used to collect water after being treated by ultrafiltration membrane assembly 6, then the substance in water body is detected and is handled, and the gas inlet of intermediate water pool 11 is connected with the gas outlet of ozone generator 5 using gas guide pipe, part of ozone generated in ozone generator 5 is input into intermediate water pool 11 to disinfect water body, and is detained for a period of time, and the interval of this time is 15-30min, so that residual ozone in water body is completely decomposed, and after the water treated is detected, the content of organic matter, polyvalent ion (for example: sulfate, calcium and magnesium ions) etc. In water;The water outlet of intermediate water pool 11 is connected with the water inlet of clean water pump 14 using water pipe, and the water outlet of clean water pump 14 is connected with the water inlet of clean water storage 15 using water pipe, and the water storage tank etc. In the present instance, if the content of organic matter and polyvalent ion (for example: sulfate, calcium and magnesium ions) etc. In water in intermediate water pool 11 reaches the standard of "Drinking Water Health Standards" (GB5749-2006), then the water in intermediate water pool 11 is transported to clean water storage 15 for storage by clean water pump 14, and then is used.

[0019] See Figure 1The outlet of the intermediate water tank 11 is connected to the inlet of the booster pump 12 through a water pipe, the outlet of the booster pump 12 is connected to the first inlet of the nanofiltration membrane assembly 13 through a water pipe, the first outlet of the nanofiltration membrane assembly 13 is connected to the inlet of the clean water pump 14 through a water pipe, if the detection result of the content of organic matter and polyvalent ions (such as sulfate, calcium and magnesium ions) in the water in the intermediate water tank 11 does not reach the drinking water health standard, the water in the intermediate water tank 11 is transported to the nanofiltration membrane assembly 13 through the booster pump 12 for further filtration, so as to remove most of the organic matter and polyvalent ions in the water body, so that the content of the substances in the water reaches the standard, and then the water is input into the clean water storage device 15 through the clean water pump 14 for storage and waiting for use.

[0020] Preferably, the filtering precision of the laminated filter 3 in the embodiment ranges from 20 to 200 μm, and the filtering precision of the ultrafiltration membrane assembly 6 ranges from 10 to 100 nm.

[0021] Referring to Figure 1 The outlet of the intermediate water tank 11 is connected to the inlet of the backwashing pump 9 through a water pipe, the outlet of the backwashing pump 9 is connected to the inlet of the first jet device 10 and the second inlet of the laminated filter 3 through a water pipe, the outlet of the first jet device 10 is connected to the second inlet of the ultrafiltration membrane assembly 6 through a water pipe, the outlet of the ultrafiltration membrane assembly 6 is connected to the inlet of the waste liquid neutralization tank 8 through a water pipe, and the outlet of the waste liquid neutralization tank 8 is connected to the inlet of the raw water pump 2 through a water pipe; the above-mentioned loop is used for cleaning the laminated filter 3 and the ultrafiltration membrane assembly 6 used for a period of time, the cleaning process is water washing for the laminated filter 3 and water washing and chemical cleaning (the raw water pump 2 and the clean water pump 14 are stopped during the cleaning process) for the ultrafiltration membrane assembly 6, so as to remove the deposited substances in the laminated filter 3 and the ultrafiltration membrane assembly 6, prolong the service life of the laminated filter 3 and the ultrafiltration membrane assembly 6, and restore the filtering performance of the laminated filter 3 and the ultrafiltration membrane assembly 6;

[0022] The water washing of the laminated filter 3 and the ultrafiltration membrane assembly 6 is performed by drawing the water source in the intermediate water tank 11 through the backwashing pump 9, then transporting the water to the laminated filter 3 through a water pipe, then passing through the pipe mixer 4, then inputting the water into the ultrafiltration membrane assembly 6, and finally converging the water into the waste liquid neutralization tank 8;

[0023] The chemical cleaning of the ultrafiltration membrane assembly 6 is performed by drawing the water in the intermediate water tank 11 through the backwashing pump 9, then conveying the water to the first jet device 10 through the water pipe, at the same time, the first jet device 10 is also connected to the ozone generator 5 to introduce the ozone into the first jet device 10, the ozone is dissolved in the water to form the ozone cleaning liquid, then the ozone cleaning liquid is introduced into the ultrafiltration membrane assembly 6 from the second water inlet of the ultrafiltration membrane assembly 6, the residual pollutants in the ultrafiltration membrane assembly 6 are oxidized to remove the residual pollutants in the ultrafiltration membrane assembly 6, after the cleaning is completed, the waste liquid generated in the cleaning is discharged into the waste liquid neutralization tank 8 through the water outlet of the ultrafiltration membrane assembly 6, after the cleaning of the whole device is completed, the waste liquid in the waste liquid neutralization tank 8 is filtered by the raw water pump 2, the cleaning method does not generate waste liquid, the discharge of the waste liquid is reduced, and the ecological environment is protected.

[0024] Further, the air inlet of the ultrafiltration membrane assembly 6 is connected to the air outlet of the air compressor 7 through the air guide pipe, the air compressor 7 is used for air cleaning of the ultrafiltration membrane assembly 6, the cleaning is performed by providing the air source through the air compressor 7, the air is introduced into the ultrafiltration membrane assembly 6 to remove the pollutants attached to the ultrafiltration membrane assembly 6.

[0025] Referring to Figure 1 The water outlet of the backwashing pump 9 is connected to the water inlet of the second jet device 16 through the water pipe, the water outlet of the second jet device 16 is connected to the second water inlet of the nanofiltration membrane assembly 13 through the water pipe, the water outlet of the nanofiltration membrane assembly 13 is connected to the water inlet of the waste liquid neutralization tank 8 through the water pipe, and the air inlet of the second jet device 16 is connected to the air outlet of the ozone generator 5 through the air guide pipe; the above-mentioned loop is used for cleaning the nanofiltration membrane assembly 13, the cleaning is performed by using the water cleaning and the chemical cleaning; wherein the water cleaning is performed by drawing the water in the intermediate water tank 11 through the booster pump 12, then the water is introduced into the device from the second water inlet of the nanofiltration membrane assembly 13 to clean the nanofiltration membrane assembly 13; the chemical cleaning is performed by drawing the water in the intermediate water tank 11 through the backwashing pump 9, then the water is introduced into the second jet device 16, the ozone is introduced into the second jet device 16 through the ozone generator 5, the ozone and the water in the second jet device 16 form the ozone cleaning liquid, then the ozone cleaning liquid is introduced into the nanofiltration membrane assembly 13 from the second water inlet of the nanofiltration membrane assembly 13 to oxidize the residual pollutants in the nanofiltration membrane assembly 13, the residual pollutants in the nanofiltration membrane assembly 13 are treated by oxidation, after the cleaning is completed, the waste liquid generated in the cleaning is discharged into the waste liquid neutralization tank 8 through the water outlet of the nanofiltration membrane assembly 13.

[0026] Preferably, the liquid medicine is added into the waste liquid neutralization tank 8 to neutralize the PH value, so that the PH value in the waste liquid neutralization tank 8 is neutral, in the actual example, the liquid medicine added into the waste liquid neutralization tank 8 is dilute sulfuric acid.

[0027] Referring to Figure 1, the connecting water pipe between the ultrafiltration membrane assembly 6 and the intermediate water pool 11, the connecting water pipe between the ultrafiltration membrane assembly 6 and the waste liquid neutralization pool 8, the connecting water pipe between the intermediate water pool 11 and the backwashing pump 9, the connecting water pipe between the intermediate water pool 11 and the clean water pump 14, the connecting water pipe between the intermediate water pool 11 and the booster pump 12, the connecting water pipe between the nanofiltration membrane assembly 13 and the clean water pump 14, the connecting water pipe between the second jet device 16 and the nanofiltration membrane assembly 13, and the connecting water pipe between the nanofiltration membrane assembly 13 and the waste liquid neutralization pool 8 are respectively provided with an electric valve 17, the electric valves 17 control the flow direction of water in the purified water source process route and the cleaning route by opening and closing, so that the purified water flows into the intermediate water pool 11, the waste liquid generated by cleaning the laminated filter 3 and the ultrafiltration membrane assembly 6 can only flow into the waste liquid neutralization pool 8, avoiding the waste liquid generated by cleaning from flowing into the intermediate water pool 11 and polluting the water in the intermediate water pool 11, and the water in the intermediate water pool 11 needs to be repeatedly filtered, increasing the cost of water purification of the micro-polluted water source 1.

[0028] Preferably, the opening and closing signals of the electric valves 17 are connected with the signals of a controller through a local area network, and the signals of the controller are further connected with the start and stop signals of the raw water pump 2, the booster pump 12, the clean water pump 14 and the backwashing pump 9, the start and stop signals of the ozone generator 5 and the start and stop signals of the air compressor 7. In the embodiment, the controller is a PLC controller.

[0029] In the present fact example, the filtering precision of the laminated filter 3 ranges from 20 to 200 microns, the filtering precision of the ultrafiltration membrane assembly 6 ranges from 10 to 100 nanometers, and the material of the ultrafiltration membrane is an ozone oxidation resistant material such as polyvinylidene fluoride; the filtering precision of the nanofiltration membrane assembly 13 ranges from 1 to 10 nanometers, and the nanofiltration membrane is a roll type or hollow fiber structure composite membrane (or homogeneous membrane).

[0030] Further, the ultrafiltration membrane assembly 6 comprises a mounting seat, a first water inlet pipe, a second water inlet pipe, a gas guide pipe, a drainage pipe and an ultrafiltration membrane, the first water inlet pipe, the second water inlet pipe, the gas guide pipe and the drainage pipe are mounted in the mounting seat and communicate with the ultrafiltration membrane, and the ultrafiltration membrane is provided with at least one,

[0031] The process of purifying the water in the micro-polluted water source 1 by the device is as follows: the controller is controlled to open the electric valve 17 located on the connecting water pipe between the ultrafiltration membrane assembly 6 and the intermediate water pool 11, and then the raw water pump 2 and the ozone generator 5 are started to transport the water in the micro-polluted water source 1 to the laminated filter 3 for filtration, then the filtered water is transported to the pipeline mixer 4, ozone is introduced into the pipeline mixer 4 to oxidize the pollutants in the water, and then the water filtered by the ultrafiltration membrane assembly 6 is transported to the intermediate water pool 11 for detection.

[0032] If the content of the substance in the water reaches the standard of drinking water, the controller opens the electric valve 17 on the connecting water pipe between the intermediate pool 11 and the clean water pump 14, and the clean water pump 14 transports the water in the intermediate pool 11 to the clean water storage 15 for storage;

[0033] If the content of the substance in the water does not reach the standard of drinking water, the controller opens the electric valve 17 on the connecting water pipe between the intermediate pool 11 and the booster pump 12, and the connecting water pipe between the nanofiltration membrane assembly 13 and the clean water pump 14, and closes the electric valve 17 on the connecting water pipe between the intermediate pool 11 and the clean water pump 14, and the booster pump 12 transports the water in the intermediate pool 11 to the nanofiltration membrane assembly 13 for further filtration, and the clean water pump 14 transports the filtered water to the clean water storage 15 for storage;

[0034] When cleaning the equipment, the controller closes the electric valve 17 on the connecting water pipe between the intermediate pool 11 and the clean water pump 14, and the electric valve 17 on the connecting water pipe between the nanofiltration membrane assembly 13 and the clean water pump 14, and stops the raw water pump 2, the clean water pump 14 and the booster pump 12, opens the electric valve 17 on the connecting water pipe between the intermediate pool 11 and the backwashing pump 9, the connecting water pipe between the ultrafiltration membrane assembly 6 and the waste liquid neutralization pool 8, the connecting water pipe between the second jet device 16 and the nanofiltration membrane assembly 13, and the connecting water pipe between the nanofiltration membrane assembly 13 and the waste liquid neutralization pool 8, and starts the backwashing pump 9 to transport the water in the intermediate pool 11 to the first jet device 10 and the second jet device 16, so that the water is mixed with the ozone introduced into the first jet device 10 and the second jet device 16 to form ozone cleaning liquid, and the ozone cleaning liquid is introduced into the ultrafiltration membrane assembly 6 and the nanofiltration membrane assembly 13 to clean the ultrafiltration membrane assembly 6 and the nanofiltration membrane assembly 13, and then the waste liquid generated by the cleaning is discharged into the waste liquid neutralization pool 8, and the water in the micro-polluted water source 1 is purified by the raw water pump 2 to extract and treat the waste liquid.

[0035] It is to be noted that the relative terms such as first and second, etc. are used herein merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or equipment.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A micro-polluted water source water purification treatment integrated apparatus, characterized by, The application relates to a water purification system, which comprises a laminated filter (3), a raw water pump (2), a micro-polluted water source (1), a pipeline mixer (4), an ozone generator (5), an ultrafiltration membrane assembly (6), a clear water pump (14), a clear water storage (15), a waste liquid neutralization tank (8), a backwashing pump (9) and a booster pump (12). The outlet of the intermediate water tank (11) is connected with the inlet of the booster pump (12) through a pipeline, the outlet of the booster pump (12) is connected with the first inlet of the nanofiltration membrane assembly (13) through a pipeline, the outlet of the nanofiltration membrane assembly (13) is connected with the inlet of the clear water pump (14) through a pipeline, and one electric valve (17) is respectively arranged on the connecting pipeline between the intermediate water tank (11) and the booster pump (12) and on the connecting pipeline between the nanofiltration membrane assembly (13) and the clear water pump (14). The outlet of the intermediate water tank (11) is connected with the inlet of the booster pump (12) through a pipeline, the outlet of the booster pump (12) is connected with the first inlet of the nanofiltration membrane assembly (13) through a pipeline, the outlet of the nanofiltration membrane assembly (13) is connected with the inlet of the clear water pump (14) through a pipeline, and one electric valve (17) is respectively arranged on the connecting pipeline between the intermediate water tank (11) and the booster pump (12) and on the connecting pipeline between the nanofiltration membrane assembly (13) and the clear water pump (14).

2. The integrated equipment for purifying micro-polluted raw water as claimed in claim 1, wherein The outlet of the intermediate water tank (11) is connected with the inlet of the booster pump (12) through a pipeline, the outlet of the booster pump (12) is connected with the first inlet of the nanofiltration membrane assembly (13) through a pipeline, the outlet of the nanofiltration membrane assembly (13) is connected with the inlet of the clear water pump (14) through a pipeline, and one electric valve (17) is respectively arranged on the connecting pipeline between the intermediate water tank (11) and the booster pump (12) and on the connecting pipeline between the nanofiltration membrane assembly (13) and the clear water pump (14).

3. The integrated equipment for purifying micro-polluted raw water according to claim 2, characterized in that, The water outlet of the backwashing pump (9) is connected with the water inlet of the second jet device (16) through a pipeline, the water outlet of the second jet device (16) is connected with the second water inlet of the nanofiltration membrane assembly (13) through a pipeline, the water outlet of the nanofiltration membrane assembly (13) is connected with the water inlet of the waste liquid neutralization tank (8) through a pipeline, and the air inlet of the second jet device (16) is connected with the air outlet of the ozone generator (5) through a pipeline; one electric valve (17) is installed on the connecting pipeline between the second jet device (16) and the nanofiltration membrane assembly (13) and on the connecting pipeline between the nanofiltration membrane assembly (13) and the waste liquid neutralization tank (8).

4. The integrated equipment for purifying micro-polluted raw water according to claim 1, characterized in that, The air inlet of the ultrafiltration membrane assembly (6) is connected with the air outlet of the air compressor (7) through a pipeline.

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