CN221191911U - Ultrafiltration membrane water purification device - Google Patents
Ultrafiltration membrane water purification device Download PDFInfo
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- CN221191911U CN221191911U CN202322441080.1U CN202322441080U CN221191911U CN 221191911 U CN221191911 U CN 221191911U CN 202322441080 U CN202322441080 U CN 202322441080U CN 221191911 U CN221191911 U CN 221191911U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 225
- 239000012528 membrane Substances 0.000 title claims abstract description 154
- 238000000108 ultra-filtration Methods 0.000 title claims abstract description 37
- 238000000746 purification Methods 0.000 title claims description 11
- 239000000645 desinfectant Substances 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000012716 precipitator Substances 0.000 claims abstract description 22
- 230000001105 regulatory effect Effects 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000008394 flocculating agent Substances 0.000 claims abstract description 7
- 239000000701 coagulant Substances 0.000 claims description 46
- 239000003814 drug Substances 0.000 claims description 28
- 238000011010 flushing procedure Methods 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 13
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 8
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 8
- 229940079593 drug Drugs 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 2
- 239000003651 drinking water Substances 0.000 description 10
- 235000020188 drinking water Nutrition 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 229940037003 alum Drugs 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 4
- 230000016615 flocculation Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 241000195493 Cryptophyta Species 0.000 description 3
- 241000700605 Viruses Species 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 238000005374 membrane filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 241000223935 Cryptosporidium Species 0.000 description 2
- 241000243686 Eisenia fetida Species 0.000 description 2
- 241000224466 Giardia Species 0.000 description 2
- 239000002033 PVDF binder Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000009295 crossflow filtration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002384 drinking water standard Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to an ultrafiltration membrane water purifying device, wherein the ultrafiltration membrane filtering device comprises a membrane tank and a membrane processing unit, a membrane tank liquid level sensor is arranged in the membrane tank, a raw water connecting pipe is connected with a reaction precipitator through a water inlet switch valve, a water inlet electric regulating valve, a flocculating agent adding mixing unit and a water inlet flowmeter, the reaction precipitator is connected with the membrane tank, water in the membrane tank enters the membrane tank through the hollow ultrafiltration membrane surface of the membrane processing unit, an outlet connecting pipe of the membrane processing unit is connected with a clean water tank through a water outlet flowmeter, a water outlet electric regulating valve and a disinfectant adding unit, and is also connected with a water ring pump unit, a self-priming pump unit and a backwash water system; the control unit is electrically connected with the membrane tank liquid level sensor to control the water outlet flow according to the membrane tank water level, and the control unit is electrically connected with each unit and each electric control valve to control the whole device to work. The device not only has good water purifying effect, but also has high degree of automation and flexible adjustment.
Description
Technical Field
The utility model relates to the technical field of water treatment, in particular to an ultrafiltration membrane water purifying device.
Background
In recent years, a large amount of financial resources are put into the country for improving the domestic water conditions in rural areas. The large-scale domestic drinking water purifying equipment is difficult to build under the restriction of water supply network coverage due to the conditions of population dispersion, remote areas, uneven economic development level and the like in many rural areas in China, so that the small-scale domestic drinking water purifying equipment is increasingly applied, and plays an important role in solving the safety problem of drinking water in rural areas in China. However, many small-sized drinking water purifying devices in the prior art are inconvenient to manage, difficult to operate, poor in water purifying effect, incapable of meeting the standard of drinking water, and difficult to popularize and apply in rural areas because some water purifying devices adopting activated carbon adsorption and ion exchange technology require higher management level and have high operation cost. Therefore, there is a need to develop a small micro-power life drinking water purifying device with good water purifying effect, high automation degree and flexible adjustment, so as to meet the life drinking water requirement in rural areas.
Disclosure of Invention
The utility model aims to provide an ultrafiltration membrane water purifying device which has good water purifying effect, high automation degree and flexible adjustment.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the ultrafiltration membrane water purifying device comprises a water inlet switch valve, a coarse filter, a water inlet electric regulating valve, a flocculating agent adding and mixing unit, a water inlet flowmeter, a reaction precipitator, an ultrafiltration membrane filtering device, a water outlet flowmeter, a water outlet electric regulating valve, a disinfectant adding unit, a clean water tank, a fan unit, a water ring pump unit, a self-priming pump unit, a backwash water system, various connecting pipelines and a control unit, wherein the ultrafiltration membrane filtering device comprises a membrane tank and a membrane processing unit, a membrane tank liquid level sensor is arranged in the membrane tank, and the membrane processing unit is arranged at the central position in the membrane tank; the raw water connecting pipe is connected with the inlet of a reaction precipitator through a water inlet switch valve, a coarse filter, a water inlet electric regulating valve, a flocculating agent adding and mixing unit and a water inlet flowmeter in sequence, the outlet of the reaction precipitator is connected with the inlet of a membrane tank, water in the membrane tank enters the membrane processing unit through the hollow ultrafiltration membrane surface of the membrane processing unit at a certain flow rate, the outlet connecting pipe of the membrane processing unit is connected with a clean water tank through a water outlet flowmeter, a water outlet electric regulating valve and a disinfectant adding unit in sequence, the outlet connecting pipe of the membrane processing unit is also connected with a water ring pump unit, a self-priming pump unit and a backwash water system at the same time, and the air outlet pipe of the fan unit enters the membrane tank and is connected with a gas distributor at the lower part of the membrane processing unit; the control unit is electrically connected with the membrane tank liquid level sensor to control the water outlet flow according to the membrane tank water level, and is electrically connected with each unit and each electric control valve to control the whole device to work.
Further, the flocculant adding and mixing unit comprises a coagulant adding metering pump, a coagulant medicine barrel, a coagulant aid adding metering pump, a coagulant aid medicine barrel and a tubular static mixer, wherein a medicine outlet pipe of the coagulant aid medicine barrel is connected to a connecting pipeline between the water inlet electric regulating valve and the tubular static mixer through the coagulant aid adding metering pump and a first ball valve, a medicine outlet pipe of the coagulant aid medicine barrel is connected to a middle inlet of the tubular static mixer through the coagulant aid adding metering pump and a second ball valve so as to improve the coagulation effect, and an outlet of the tubular static mixer is connected with a water inlet flowmeter; the control unit is electrically connected with the coagulant adding metering pump and the coagulant aid adding metering pump to control the adding amount of the coagulant and the coagulant aid.
Further, a first butterfly valve is arranged on a connecting pipeline between the water inlet flowmeter and the inlet of the reaction precipitator, the connecting pipeline at the outlet of the reaction precipitator is divided into three paths, the first path is connected with the inlet of the membrane pond through a second butterfly valve, the second path is connected with a water pipeline for dissolving medicine through a first gate valve and is used for dissolving medicine water of coagulant and coagulant aid, and the third path is connected with a clean water pond through a bypass flow butterfly valve.
Further, the position of the membrane tank is higher than that of the clean water tank, so that the drop between the membrane tank and the clean water tank is utilized to produce water in an unpowered mode based on a siphon principle.
Further, the disinfectant adding device comprises at least two disinfectant adding units, wherein a medicine outlet pipe of a first disinfectant adding unit is connected to a connecting pipeline between the water outlet electric regulating valve and the clean water tank so as to add sodium hypochlorite disinfectant into purified water filtered by the ultrafiltration membrane, and a medicine outlet pipe of a second disinfectant adding unit is connected to the membrane tank so as to add sodium hypochlorite disinfectant into water in the membrane tank.
Further, the water ring pump unit comprises a first electric gate valve, a water ring pump and a water ring pump water tank, wherein the outlet connecting pipe of the membrane treatment unit is connected with the water ring pump inlet through the first electric gate valve in a branch way, and the water ring pump outlet is connected with the water ring pump water tank.
Further, the self-priming pump unit comprises a first electric butterfly valve, a self-priming pump, a first check valve and a second gate valve, and the backwash water system comprises a third gate valve, a second electric butterfly valve, a second check valve, a backwash pump, a third butterfly valve, a backwash water tank and a third disinfectant adding unit; the outlet connecting pipe of the membrane treatment unit is connected with the inlet of the self-priming pump through a first electric butterfly valve, and the outlet connecting pipe of the self-priming pump extends into the back flushing water tank after passing through a first check valve and a second gate valve; the back flushing pump inlet connecting pipe is connected with the back flushing water tank through a third butterfly valve, and the back flushing pump outlet connecting pipe is connected with the outlet connecting pipe of the membrane processing unit through a second check valve, a second electric butterfly valve and a third gate valve; and a medicine outlet pipe of the third disinfectant adding unit is connected to a connecting pipeline between the back flushing pump and the second check valve.
Further, the fan unit comprises a third electric butterfly valve, a third check valve and a fan, and an air outlet pipe of the fan enters the membrane tank after passing through the third check valve and the third electric butterfly valve and is connected with the air distributor at the lower part of the membrane treatment unit.
Compared with the prior art, the utility model has the following beneficial effects: the device combines the conventional water purification technologies such as flocculation reaction and precipitation and the immersed membrane filtration technology, and automatically controls the operation of equipment through a control unit, so that the device has good water purification effect, is flexible to adjust, can realize stable and reliable constant-current water production through smaller power, and meets the requirements of rural safe drinking water. Therefore, the utility model has strong practicability and wide application prospect.
Drawings
Fig. 1 is a schematic diagram of an apparatus implementation of an embodiment of the present utility model.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1, the embodiment provides an ultrafiltration membrane water purifying device, which comprises a water inlet switch valve 1, a coarse filter 42, a water inlet electric control valve 2, a flocculating agent adding and mixing unit, a water inlet flowmeter 3, a reaction precipitator 4, an ultrafiltration membrane filtering device, a water outlet flowmeter 5, a water outlet electric control valve 6, a disinfectant adding unit 7, a clean water tank 8, a fan unit, a water ring pump unit, a self-priming pump unit, a backwash water system, various connecting pipelines and a control unit, wherein the ultrafiltration membrane filtering device comprises a membrane tank 9 and a membrane processing unit 10, a membrane tank liquid level sensor 11 is arranged in the membrane tank 9, and the membrane processing unit 10 is arranged at the central position in the membrane tank 9; raw water connection pipes are sequentially connected with an inlet of a reaction precipitator 4 through a water inlet switch valve 1, a coarse filter 42, a water inlet electric regulating valve 2, a flocculating agent adding and mixing unit and a water inlet flow meter 3, an outlet of the reaction precipitator 4 is connected with an inlet of a membrane tank 9, water in the membrane tank 9 enters the membrane treatment unit 10 through the hollow ultrafiltration membrane surface of the membrane treatment unit 10 at a certain flow rate, an outlet connection pipe of the membrane treatment unit 10 is sequentially connected with a clean water tank 8 through a water outlet flow meter 5, a water outlet electric regulating valve 6 and a disinfectant adding unit 7, the outlet connection pipe of the membrane treatment unit 10 is also simultaneously connected with a water ring pump unit, a self-priming pump unit and a backwash water system, an air outlet pipe of the fan unit enters the membrane tank and is connected with a gas distributor at the lower part of the membrane treatment unit, a plurality of gas distribution holes are uniformly formed in the gas distributor, and the gas-water mixed flushing is realized during backwash; the control unit is electrically connected with the membrane tank liquid level sensor to control the water outlet flow according to the membrane tank water level, and is electrically connected with each unit and each electric control valve to control the whole device to work.
In this embodiment, the valve body of the water inlet switch valve 1 adopts a gate valve, and the valve bodies of the water inlet electric regulating valve 2 and the water outlet electric regulating valve 6 both adopt butterfly valves.
The flocculant adding and mixing unit comprises a coagulant adding metering pump 12, a coagulant medicine barrel 13, a coagulant aid adding metering pump 14, a coagulant aid medicine barrel 15 and a tubular static mixer 16, wherein a medicine outlet pipe of the coagulant aid medicine barrel 13 is connected to a connecting pipe between the water inlet electric regulating valve 2 and the tubular static mixer 16 through the coagulant aid adding metering pump 12 and a first ball valve 17, and a medicine outlet pipe of the coagulant aid medicine barrel 15 is connected to a middle inlet of the tubular static mixer 16 through the coagulant aid adding metering pump 14 and a second ball valve 18 so as to improve the coagulation effect, and an outlet of the tubular static mixer 16 is connected with the water inlet flowmeter 3; the control unit is electrically connected with the coagulant adding metering pump 12 and the coagulant aid adding metering pump 14 to control the adding amount of the coagulant and the coagulant aid.
The connecting pipeline between the water inlet flowmeter 3 and the inlet of the reaction precipitator 4 is provided with a first butterfly valve 19, the connecting pipeline at the outlet of the reaction precipitator 4 is divided into three paths, the first path is connected with the inlet of the membrane tank 9 through a second butterfly valve 20, the second path is connected with a water pipeline for dissolving medicines through a first gate valve 21 and used for coagulant and coagulant aid, and the third path is connected with a clean water tank through a bypass flow butterfly valve 22. The side of the bottom of the reaction precipitator 4 is led to a drain through a fourth electric butterfly valve 43 for the timing sludge discharge of the reaction precipitator 4. And a super-water level overflow pipe is led out from the side of the top of the reaction precipitator 4, so that the super-water level overflow of the reaction precipitator 4 is realized.
The position of the membrane tank 9 is higher than that of the clean water tank 8, so that the water is produced by utilizing the fall between the membrane tank 9 and the clean water tank 8 based on the siphon principle. The side of the bottom of the membrane tank 9 is led to a drain through a fifth electric butterfly valve 44 for the timing mud discharge of the membrane tank 9. And a super-water level overflow pipe is also led out from the side of the top of the membrane tank 9, so that the super-water level overflow of the membrane tank 9 is realized.
The outlet connecting pipe of the membrane processing unit is also provided with a pressure sensor 23, and the pressure sensor 23 detects the water outlet pressure of the membrane processing unit in real time and sends the water outlet pressure to the control unit.
When the device is used for purifying water, the coagulant adding metering pump 12 and the coagulant aid adding metering pump 14 are regulated according to the turbidity, the PH value and the temperature of raw water to control the adding of the coagulant and the coagulant aid, so that the flocculant added into the raw water is optimized. The flocculant is added into the raw water, the raw water and the flocculant are rapidly mixed by the tubular static mixer 16, and the flocculant is fully and uniformly diffused in the water body, thereby creating favorable conditions for the subsequent flocculation reaction.
The mixed raw water enters a reaction precipitator 4, evenly dense alum blossom which is easy to precipitate is formed through flocculation reaction, and then precipitation is carried out, so that a stable flocculent suspension layer with the thickness of 200-300mm is formed below a precipitation area, the suspension layer has excellent filtration resistance on fine alum blossom generated by low-temperature low-turbidity raw water and light alum blossom generated by algae-containing raw water, and the flocculent suspension layer can accelerate alum blossom settlement of high-turbidity raw water and ensure that the turbidity of water after precipitation is lower than 5NTU.
The water producing mode of the immersed ultrafiltration membrane filtering device is siphon constant flow water (unpowered water producing by utilizing the fall of a membrane pool). The precipitated water body is introduced into a membrane pool 9 of an ultrafiltration membrane filtering device, a membrane treatment unit mainly comprises a hollow fiber ultrafiltration membrane with an average pore diameter of 0.03 mu m and PVDF, the water body passes through the surface of the membrane at a certain flow rate under the action of pressure, substances smaller than the pore diameter of the membrane pass through the membrane fiber wall, and substances, such as particle impurities, colloid and the like larger than the pore diameter of the membrane are intercepted by the membrane fiber wall. The ultrafiltration membrane filter device has good effluent quality, and the turbidity, suspended solids, total bacteria and removal rate of escherichia coli in the water are high, and the effluent turbidity is high: the long-term energy-saving water-producing device is less than or equal to 0.2NTU, the equipment investment and the operation cost are low, the cost performance is high, the service life of the PVDF membrane is longer than 5 years, the long-term stable operation of the ultrafiltration membrane filter device is ensured, the energy-saving filtration membrane is small in pressure, and the liquid level difference of a membrane pool and a clean water pool can be utilized for siphoning water production.
In this embodiment, the device includes three disinfectant adding units, the drug outlet pipe of the first disinfectant adding unit 7 is connected to the connecting pipeline between the water outlet electric control valve 6 and the clean water tank 8, so as to add sodium hypochlorite disinfectant into the clean water filtered by the ultrafiltration membrane, the drug outlet pipe of the second disinfectant adding unit 24 is connected to the membrane tank 9, so as to add sodium hypochlorite disinfectant into the water in the membrane tank 9, and the setting of the third disinfectant adding unit 25 will be further described below.
The device can effectively remove solid particles, algae, bacteria, viruses, giardia, cryptosporidium, red worms and other harmful substances in the water body through the ultrafiltration membrane filtration technology, and can further effectively kill bacteria and viruses in the water by adding the sodium hypochlorite disinfectant, and keep the equipment effluent to have a certain residual chlorine, prevent bacteria secondary breeding and ensure that the quality of the effluent reaches the drinking water standard.
The water ring pump unit comprises a first electric gate valve 26, a water ring pump 27 and a water ring pump water tank 28, wherein an outlet connecting pipe of the membrane treatment unit 10 is connected with an inlet of the water ring pump 27 through the first electric gate valve 26, and an outlet of the water ring pump 27 is connected with the water ring pump water tank 28.
The self-priming pump unit includes a first electrically operated butterfly valve 29, a self-priming pump 30, a first check valve 31 and a second gate valve 32. The backwash system comprises a third gate valve 33, a second electric butterfly valve 34, a second check valve 35, a backwash pump 36, a third butterfly valve 37, a backwash tank 38 and a third disinfectant dosing unit 25. The outlet connecting pipe of the membrane processing unit 10 is connected with the inlet of the self-priming pump 30 through a first electric butterfly valve 29, and the outlet connecting pipe of the self-priming pump 30 extends into the back flushing water tank 38 through a first check valve 31 and a second gate valve 32. The inlet connecting pipe of the back flushing pump 36 is connected with a back flushing water tank 38 through a third butterfly valve 37, and the outlet connecting pipe of the back flushing pump 36 is connected with the outlet connecting pipe of the membrane processing unit 10 through a second check valve 35, a second electric butterfly valve 34 and a third gate valve 33. The outlet pipe of the third disinfectant adding unit 25 is connected to a connecting pipe between the backwash pump 36 and the second check valve 35.
The fan unit comprises a third electric butterfly valve 39, a third check valve 40 and a fan 41, wherein an air outlet pipe of the fan 41 passes through the third check valve 40 and the third electric butterfly valve 39, enters the membrane tank 9 and is connected with a gas distributor at the lower part of the membrane treatment unit 10.
The device adopts a cross-flow filtration and intermittent automatic cleaning (air and water washing processes), adopts an air-water linkage process, and the air blown out from the fan is blown out from the air distributor at the bottom of the membrane treatment unit 10 from bottom to top, and drives the fiber membrane to vibrate and rub while the air is blown out, and then the backwash water is blown out from the inner cavity of the membrane to bring the outer membrane dirt out of the device, so that the whole process is automatically controlled by the control unit to operate.
When the device starts to operate, the water inlet switch valve 1 is opened, when the water level of the membrane tank reaches a certain height, the first electric gate valve 26 is opened, the water inlet ring pump 27 operates for a set time (within 10 minutes) or is closed after the pressure sensor 23 detects that the pressure on the outlet connecting pipe of the membrane treatment unit is negative pressure, the first electric gate valve 26 is closed, and the water outlet regulating valve 6 is opened to carry out water outlet. When the liquid level in the backwash tank 38 is lower than the set low liquid level, the first electric butterfly valve 29 is opened, the self-priming pump 30 is turned on, and when the liquid level in the backwash tank 38 rises to the set high liquid level, the first electric butterfly valve 29 is turned off, and the self-priming pump 30 is turned off.
When back flushing the membrane tank, the working flows of the fan unit and the back flushing system are as follows.
A fan unit: the third electric butterfly valve 39 is opened, the fan 41 is opened (the operation can be performed when the self-priming pump 30, the back flushing pump 36 and the water ring pump 27 stop and the membrane pool water level reaches a certain height, and the operation is waited when the self-priming pump 30, the back flushing pump 36 and the water ring pump are not satisfied), the fan 41 is closed after a set time (within 2 minutes), and the operation is started after an interval of 10-100 minutes. The cycle is repeated.
Backwash water system: at the interval of closing the blower 41, closing the water outlet electric regulating valve 6, synchronously opening the fifth electric butterfly valve 44 at the side of the bottom of the membrane tank 9 to carry out sewage discharge, opening the second electric butterfly valve 34, opening the backwash pump 36 (which can operate when the self-priming pump 30, the blower 41, the water ring pump 27 are stopped and the liquid level of the backwash water tank 38 reaches a certain height, and waiting to operate if the liquid level is not satisfied), opening the third disinfectant adding unit 25 to add sodium hypochlorite disinfectant, closing the fifth electric butterfly valve 44 after the operation setting time (within 10 minutes), closing the third disinfectant adding unit 25 when the water level of the membrane tank rises to a certain height, closing the second electric butterfly valve 34, opening the water outlet electric regulating valve 6, and starting to operate after the interval of 10-500 minutes. The cycle is repeated.
The ultrafiltration membrane water purifying device provided by the utility model primarily treats raw water by utilizing flocculation reaction and precipitation technology, and reduces indexes such as turbidity, chromaticity and the like of source water, so that the adaptability of the whole equipment to high turbid water is effectively improved, the load resistance of the device is enhanced, and the service lives of the equipment and the membrane are prolonged; then, the low-pressure high-flux immersed hollow ultrafiltration membrane is used as a filter core by a membrane filtration technology, so that harmful substances such as solid particles, algae, bacteria, viruses, giardia, cryptosporidium, red worms and the like in water are effectively removed, indexes such as turbidity and chromaticity of the water are reduced, the effluent quality meets the relevant requirements of sanitary standard of domestic drinking water (GB 5749-2006), and the method has the advantages of high-quality produced water turbidity of long-term not more than 1 NTU, energy conservation, low-pressure utilization of the liquid level difference of a membrane pool and a clean water pool, siphon produced water, stable operation, wide applicability, full automatic control, high degree of automation, simple operation and the like, thereby meeting the domestic drinking water requirements of rural areas in remote areas, various application scenes such as long-term city middle and small units and the like.
The above description is only a preferred embodiment of the present utility model, and is not intended to limit the utility model in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present utility model still fall within the protection scope of the technical solution of the present utility model.
Claims (8)
1. The ultrafiltration membrane water purifying device is characterized by comprising a water inlet switch valve, a coarse filter, a water inlet electric regulating valve, a flocculating agent adding and mixing unit, a water inlet flowmeter, a reaction precipitator, an ultrafiltration membrane filtering device, a water outlet flowmeter, a water outlet electric regulating valve, a disinfectant adding unit, a clean water tank, a fan unit, a water ring pump unit, a self-priming pump unit, a backwash water system, various connecting pipelines and a control unit, wherein the ultrafiltration membrane filtering device comprises a membrane tank and a membrane processing unit, a membrane tank liquid level sensor is arranged in the membrane tank, and the membrane processing unit is arranged at the central position in the membrane tank; the raw water connecting pipe is connected with the inlet of a reaction precipitator through a water inlet switch valve, a coarse filter, a water inlet electric regulating valve, a flocculating agent adding and mixing unit and a water inlet flowmeter in sequence, the outlet of the reaction precipitator is connected with the inlet of a membrane tank, water in the membrane tank enters the membrane processing unit through the hollow ultrafiltration membrane surface of the membrane processing unit at a certain flow rate, the outlet connecting pipe of the membrane processing unit is connected with a clean water tank through a water outlet flowmeter, a water outlet electric regulating valve and a disinfectant adding unit in sequence, the outlet connecting pipe of the membrane processing unit is also connected with a water ring pump unit, a self-priming pump unit and a backwash water system at the same time, and the air outlet pipe of the fan unit enters the membrane tank and is connected with a gas distributor at the lower part of the membrane processing unit; the control unit is electrically connected with the membrane tank liquid level sensor to control the water outlet flow according to the membrane tank water level, and is electrically connected with each unit and each electric control valve to control the whole device to work.
2. The ultrafiltration membrane water purification device according to claim 1, wherein the flocculant adding and mixing unit comprises a coagulant adding metering pump, a coagulant medicine barrel, a coagulant aid adding metering pump, a coagulant aid medicine barrel and a tubular static mixer, a medicine outlet pipe of the coagulant aid medicine barrel is connected to a connecting pipeline between a water inlet electric regulating valve and the tubular static mixer through the coagulant adding metering pump and a first ball valve, and a medicine outlet pipe of the coagulant aid medicine barrel is connected to a middle inlet of the tubular static mixer through the coagulant aid adding metering pump and a second ball valve so as to improve the coagulation effect, and an outlet of the tubular static mixer is connected with a water inlet flowmeter; the control unit is electrically connected with the coagulant adding metering pump and the coagulant aid adding metering pump to control the adding amount of the coagulant and the coagulant aid.
3. The ultrafiltration membrane water purification device according to claim 1, wherein a first butterfly valve is arranged on a connecting pipeline between the water inlet flowmeter and the inlet of the reaction precipitator, the connecting pipeline at the outlet of the reaction precipitator is divided into three paths, the first path is connected with the inlet of the membrane tank through a second butterfly valve, the second path is connected with a water pipeline for dissolving medicines through a first gate valve, the water pipeline for dissolving the coagulant and the coagulant aid is used, and the third path is connected with a clean water tank through a bypass flow butterfly valve.
4. The ultrafiltration membrane water purification apparatus of claim 1, wherein the membrane tank is located higher than the clean water tank to produce water based on a siphon principle using a fall between the membrane tank and the clean water tank without power.
5. The ultrafiltration membrane water purification device according to claim 1, comprising at least two disinfectant adding units, wherein the outlet pipe of the first disinfectant adding unit is connected to a connecting pipeline between the outlet electric control valve and the clean water tank to add sodium hypochlorite disinfectant to the purified water filtered by the ultrafiltration membrane, and the outlet pipe of the second disinfectant adding unit is connected to the membrane tank to add sodium hypochlorite disinfectant to the water in the membrane tank.
6. The ultrafiltration membrane water purification device according to claim 1, wherein the water ring pump unit comprises a first electric gate valve, a water ring pump and a water ring pump water tank, the outlet connection pipe of the membrane treatment unit is connected with the water ring pump inlet through the first electric gate valve in one path, and the water ring pump outlet is connected with the water ring pump water tank.
7. The ultrafiltration membrane water purification apparatus of claim 1, wherein the self-priming pump unit comprises a first electric butterfly valve, a self-priming pump, a first check valve, and a second gate valve, and the backwash system comprises a third gate valve, a second electric butterfly valve, a second check valve, a backwash pump, a third butterfly valve, a backwash tank, and a third disinfectant dosing unit; the outlet connecting pipe of the membrane treatment unit is connected with the inlet of the self-priming pump through a first electric butterfly valve, and the outlet connecting pipe of the self-priming pump extends into the back flushing water tank after passing through a first check valve and a second gate valve; the back flushing pump inlet connecting pipe is connected with the back flushing water tank through a third butterfly valve, and the back flushing pump outlet connecting pipe is connected with the outlet connecting pipe of the membrane processing unit through a second check valve, a second electric butterfly valve and a third gate valve; and a medicine outlet pipe of the third disinfectant adding unit is connected to a connecting pipeline between the back flushing pump and the second check valve.
8. The ultrafiltration membrane water purification device according to claim 1, wherein the fan unit comprises a third electric butterfly valve, a third check valve and a fan, and an air outlet pipe of the fan passes through the third check valve and the third electric butterfly valve, enters the membrane tank and is connected with the air distributor at the lower part of the membrane treatment unit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117303624A (en) * | 2023-09-08 | 2023-12-29 | 福州海恒水务设备有限公司 | Ultrafiltration membrane water purification system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117303624A (en) * | 2023-09-08 | 2023-12-29 | 福州海恒水务设备有限公司 | Ultrafiltration membrane water purification system |
| CN117303624B (en) * | 2023-09-08 | 2025-02-14 | 福州海恒水务设备有限公司 | Ultrafiltration membrane water purification system |
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