CN211111200U - Immersed ultrafiltration membrane water purification treatment device for conventional pollution of drinking water - Google Patents
Immersed ultrafiltration membrane water purification treatment device for conventional pollution of drinking water Download PDFInfo
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- CN211111200U CN211111200U CN201922107684.6U CN201922107684U CN211111200U CN 211111200 U CN211111200 U CN 211111200U CN 201922107684 U CN201922107684 U CN 201922107684U CN 211111200 U CN211111200 U CN 211111200U
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Abstract
The utility model discloses an submergence formula milipore filter water purification unit for drinking water conventional pollution, include: the system comprises a raw water tank, an ultrafiltration membrane pool, a water production tank, a cleaning system connected with the ultrafiltration membrane pool, an immersed ultrafiltration membrane component arranged in the ultrafiltration membrane pool, a water inlet pipeline communicated with the raw water tank and the ultrafiltration membrane pool, and a water production pipeline communicated with the ultrafiltration membrane pool and the water production tank, wherein the water production tank is provided with an emptying pipeline and a water production tank emptying valve; the system is characterized by further comprising a programmable controller, wherein a water inlet valve, a raw water pump and a water inlet regulating valve are arranged on the water inlet pipeline, a suction pump and an online flowmeter are arranged on the water production pipeline, an ultrafiltration membrane pool emptying valve and an online liquid level meter are arranged on the ultrafiltration membrane pool, and the programmable controller is respectively connected with the raw water pump, the water inlet regulating valve, the water inlet valve, the online flowmeter, the online liquid level meter, the water production tank emptying valve, the ultrafiltration membrane pool emptying valve and the suction pump.
Description
Technical Field
The utility model relates to a water filtration technology field especially relates to an submergence formula milipore filter water purification unit for drinking water conventional pollution.
Background
Under the influence of complicated water environment pollution conditions and continuous improvement of drinking water sanitation standards in China, the traditional drinking water treatment process taking coagulation, precipitation, filtration and disinfection as a core is difficult to meet the increasingly improved drinking water quality and water quantity requirements of people. In order to solve the water supply contradiction in the modern society, experts propose a third generation drinking water treatment process taking ultrafiltration as a core. By utilizing the powerful screening function, the ultrafiltration membrane can effectively intercept large-size particles, viruses, bacteria and other harmful microorganisms in water, and fully ensures the biological safety of drinking water. However, due to the oversize of the membrane pores, the retention capacity of the ultrafiltration membrane on soluble pollutants in water is still widely questioned, and the failure to fully ensure the chemical safety of drinking water and the problem of membrane pollution in the practical implementation process of the ultrafiltration process become main reasons for hindering the further development of the ultrafiltration process.
In recent years, ultrafiltration technology is widely applied to domestic and overseas large and medium-sized drinking water plants, the application scene is the upgrading and transformation of small water plants in urban areas and the construction of large-scale water plants, and the application mode mainly adopts the ultrafiltration technology as the advanced treatment technology after the traditional drinking water treatment process so as to improve the quality of outlet waterAnd (4) requiring. However, the application method has the problems of long process flow, large occupied area of structures, overhigh operation cost and the like, and the water quality purification capacity of the ultrafiltration membrane cannot be fully exerted, so that the purified water quantity is remarkably improved. In combination with the local raw water quality conditions, researchers have begun to gradually explore drinking water treatment processes with short flow, no chemicals, and low energy consumption. The continuous filtration-ultrafiltration process for treating the Songhua river water by using Huangqiaojin and the like finds that the process has good removal effect on turbidity and ammonia nitrogen, but has poor removal effect on organic matters, the removal rate on COD is 32.21, and the process has no harm to UV254The removal rate of (a) was 17.12%; the raw water direct ultrafiltration process based on low water head and low flux is developed by Chennan and the like, and test results show that when reservoir water with good water quality is taken as a treatment object, the direct ultrafiltration process can keep stable operation for a long time, and the effluent quality indexes all meet the requirements of sanitary Standard for Drinking Water, namely GB 5749-2006.
In order to further discuss the applicability of the short-flow green drinking water treatment process, the utility model develops the experimental research of directly treating the water in the north river by the immersed ultrafiltration membrane water purification treatment device. Research and investigation two working conditions of ultrafiltration membrane flux and continuous filtration time to remove COD and UV of pilot plant254Turbidity, ammonia nitrogen and nitrite nitrogen and their effect on membrane fouling was analysed.
Disclosure of Invention
To the problem that exists among the prior art, the utility model aims to provide an submergence formula milipore filter water purification unit that is used for drinking water conventional pollution of adjustable milipore filter flux and continuous filter time.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an immersed ultrafiltration membrane water purification treatment device for conventional drinking water pollution comprises: the system comprises a raw water tank, an ultrafiltration membrane pool, a water production tank, a cleaning system connected with the ultrafiltration membrane pool, an immersed ultrafiltration membrane component arranged in the ultrafiltration membrane pool, a water inlet pipeline communicated with the raw water tank and the ultrafiltration membrane pool, and a water production pipeline communicated with the ultrafiltration membrane pool and the water production tank, wherein the water production tank is provided with an emptying pipeline and a water production tank emptying valve; the device is characterized by further comprising a programmable controller, wherein a water inlet valve, a raw water pump and a water inlet adjusting valve are arranged on the water inlet pipeline, a suction pump and an online flowmeter are arranged on the water production pipeline, an ultrafiltration membrane pool emptying valve and an online liquid level meter are arranged on the ultrafiltration membrane pool, and the programmable controller is respectively connected with the raw water pump, the water inlet adjusting valve, the water inlet valve, the online flowmeter, the online liquid level meter, a water production tank emptying valve, the ultrafiltration membrane pool emptying valve and the suction pump.
As a further explanation of the above scheme, the cleaning system comprises a cleaning pipeline connecting the water production tank and the ultrafiltration membrane tank, a backwashing pump and a backwashing valve arranged on the cleaning pipeline, a sodium hypochlorite storage tank and a dosing pump; the backwashing pump, the backwashing valve and the dosing pump are connected with the programmable controller.
As a further explanation of the above scheme, the continuous filtration time of the immersed ultrafiltration membrane module is 0.5 to 2 hours, and the cleaning system performs hydraulic flushing on the immersed ultrafiltration membrane module after the immersed ultrafiltration membrane module works for the continuous filtration time.
As a further explanation of the above scheme, the cleaning system performs maintenance cleaning on the immersed ultrafiltration membrane module every 1-3 weeks, the sodium hypochlorite concentration in the sodium hypochlorite storage tank is 200ppm, the backwashing dosing time of the dosing pump is 1.5-2.5 minutes, and the soaking time of the immersed ultrafiltration membrane module is 20-40 minutes.
As a further illustration of the above scheme, the submerged ultrafiltration membrane module is a polyvinylidene fluoride hollow fiber membrane.
As a further illustration of the above scheme, the nominal pore size of the polyvinylidene fluoride hollow fiber membrane is 0.01-0.03 μm.
As a further explanation of the above scheme, the system further comprises a control panel connected with the programmable controller, wherein a button for setting working conditions is arranged on the control panel, and the working conditions comprise hydraulic flushing frequency, hydraulic flushing intensity, critical water level, ultrafiltration membrane flux of the immersed ultrafiltration membrane module and continuous filtration time.
As further illustration of the scheme, the ultrafiltration membrane flux of the immersed ultrafiltration membrane component is 15-45L/(m)2·h)。
The utility model has the advantages that:
the utility model provides an submergence formula milipore filter water purification unit process flow is simple, and area is little, has exerted ultrafiltration technology water purification ability separately, gets rid of jumbo size particulate matter, suspended solid and organic pollutant in the aquatic, makes to go out water and satisfies "life drinking water health standard", can fully ensure drinking water quality of water safety, and easy and simple to handle, easy going, the management is maintained conveniently.
And secondly, working conditions such as ultrafiltration membrane flux, continuous filtration time and the like are properly adjusted according to the conditions of raw water quality, treated water quantity and the like, so that the device has stronger applicability, short flow and low operation energy consumption, and the discharged water can be directly drunk by adopting automatic control.
Drawings
Fig. 1 is a schematic structural diagram of an immersion type ultrafiltration membrane water purification treatment device for drinking water conventional pollution provided by the utility model.
Fig. 2 shows the effect diagram of the water purification treatment device provided by the utility model for removing COD.
FIG. 3 shows that the water purification device provided by the utility model is UV254The removal effect map of (1).
Fig. 4 is a diagram showing the effect of the water purification device provided by the present invention on removing turbidity.
Fig. 5 is a diagram showing the effect of the water purification device on removing COD along with the flux change of the ultrafiltration membrane.
FIG. 6 shows that the water purification device provided by the utility model changes UV along with the flux of the ultrafiltration membrane254The removal effect map of (1).
Fig. 7 is a diagram showing the effect of the water purification device provided by the present invention on turbidity removal along with the flux change of the ultrafiltration membrane.
Fig. 8 shows the effect diagram of the water purification treatment device provided by the utility model for removing COD along with the change of continuous filtration time.
FIG. 9 shows that the water purification device provided by the utility model changes UV along with the continuous filtration time254The removal effect map of (1).
Fig. 10 is a diagram showing the effect of the water purification apparatus of the present invention on removing turbidity along with the change of continuous filtration time.
Description of reference numerals:
1: raw water tank, 2: water inlet regulating valve, 3: raw water pump, 4: water inlet valve, 5: ultrafiltration membrane tank evacuation valve, 6: ultrafiltration membrane tank, 7: suction pump, 8: produce the water tank, 9: produce water tank emptying valve, 10: backwash pump, 11: programmable controller, 12: on-line level gauge, 13: an in-line flow meter.
Detailed Description
In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.
Furthermore, if the terms "first" and "second" are used for descriptive purposes only, they are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first" or "a second" feature may explicitly or implicitly include one or more of the features, and in the description of the invention, "at least" means one or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "assembled", "connected", and "connected", if any, are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; the two elements can be directly connected or connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
In the present application, unless otherwise specified or limited, "above" or "below" a first feature may include the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other through another feature therebetween. Also, the first feature being "above," "below," and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply an elevation which indicates a level of the first feature being higher than an elevation of the second feature. The first feature being "above", "below" and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or merely means that the first feature is at a lower level than the second feature.
The following description will be further made in conjunction with the accompanying drawings of the specification, so that the technical solution and the advantages of the present invention are clearer and clearer. The embodiments described below are exemplary and are intended to be illustrative of the present invention, but should not be construed as limiting the invention.
Referring to fig. 1, an immersion type ultrafiltration membrane water purification apparatus for conventional drinking water pollution comprises: the system comprises a raw water tank 1, an ultrafiltration membrane tank 6, a water production tank 8, a cleaning system connected with the ultrafiltration membrane tank 6, an immersed ultrafiltration membrane component arranged in the ultrafiltration membrane tank 6, a water inlet pipeline communicated with the raw water tank 1 and the ultrafiltration membrane tank 6, and a water production pipeline communicated with the ultrafiltration membrane tank 6 and the water production tank 8, wherein an emptying pipeline and a water production tank emptying valve 9 are arranged on the water production tank 8; the device is characterized by further comprising a programmable controller 11, wherein a water inlet valve 4, a raw water pump 3 and a water inlet adjusting valve 2 are arranged on the water inlet pipeline, a suction pump 7 and an online flowmeter 13 are arranged on the water production pipeline, an ultrafiltration membrane pool emptying valve 5 and an online liquid level meter 12 are arranged on the ultrafiltration membrane pool 6, and the programmable controller 11 is connected with the raw water pump 3, the water inlet adjusting valve 2, the water inlet valve 4, the online flowmeter 13, the online liquid level meter 12, a water production tank emptying valve 9, the ultrafiltration membrane pool emptying valve 5 and the suction pump 7.
The method comprises the steps that when the on-line liquid level meter 12 detects that the water level of an ultrafiltration membrane pool 6 is lower than a critical water level, the programmable controller 11 controls the water inlet valve 4 to be opened, the raw water pump 3 is started, when the on-line liquid level meter 12 detects that the water level of the ultrafiltration membrane pool 6 is equal to or higher than the critical water level, the programmable controller 11 controls the water inlet valve 4 to be closed, the raw water pump 3 stops working, the suction pump 7 keeps working or stopping according to continuous filtering time and ultrafiltration membrane flux set by the programmable controller 11, the programmable controller 11 adjusts ultrafiltration membrane flux of an immersed membrane module by controlling opening degrees of an outlet valve of the suction pump 7 and an inlet regulating valve 2, the ultrafiltration membrane flux can be calculated by a water flux value detected by an on-line flow meter and a volume of the immersed ultrafiltration membrane module, water in the ultrafiltration membrane pool enters the water production tank through a membrane pipeline, and becomes final water production or flushing water production, the programmable controller controls an opening rate of an emptying valve L of the ultrafiltration membrane tank and a backwashing water production tank to adjust the inlet flow rate of the ultrafiltration membrane module by combining with a conventional backwashing water production tank.
As to how set up operating mode condition on programmable controller, programmable controller how is according to the operating mode condition control of setting each valve and each pump open and close for this technical field's prior art, the utility model discloses do not make the improvement to above-mentioned technique, no longer describe herein.
In this embodiment, the cleaning system comprises a cleaning pipeline connecting the water production tank and the ultrafiltration membrane tank, a backwashing pump 10 and a backwashing valve arranged on the cleaning pipeline, a sodium hypochlorite storage tank, and a dosing pump; the backwashing pump 10, the backwashing valve and the dosing pump are connected with the programmable controller.
Preferably, the working duration of the immersed ultrafiltration membrane component is 0.5-2 hours, and the cleaning system performs hydraulic flushing on the immersed ultrafiltration membrane component after the immersed ultrafiltration membrane component works for the continuous filtering time. And controlling the hydraulic flushing frequency and the hydraulic flushing intensity by the programmable controller. The programmable controller controls the back washing valve and the emptying valve of the ultrafiltration membrane pool to be opened, the back washing pump is started, and water in the water production tank is introduced into the ultrafiltration membrane pool to carry out hydraulic flushing on the immersed ultrafiltration membrane component.
Preferably, the cleaning system performs maintenance cleaning on the immersed ultrafiltration membrane module every 1-3 weeks, the concentration of sodium hypochlorite in a sodium hypochlorite storage tank is 200ppm, the backwashing medicine adding time of the medicine adding pump is 1.5-2.5 minutes, the programmable controller controls the water inlet valve to be closed, the backwashing valve is opened, the backwashing pump is started to introduce water in the water production tank into the ultrafiltration membrane tank, the medicine adding pump is started to add the sodium hypochlorite in the sodium hypochlorite storage tank into the cleaning pipeline, when the water level in the ultrafiltration membrane tank reaches a preset soaking water level, the backwashing pump stops working, the backwashing valve is closed, the soaking time of the immersed ultrafiltration membrane module is 20-40 minutes, and after the soaking time is reached, the emptying valve of the ultrafiltration membrane tank is opened for drainage.
Preferably, the immersed ultrafiltration membrane water purification device further comprises a control panel connected with the programmable controller, wherein a button for setting working conditions is arranged on the control panel, and the working conditions comprise hydraulic flushing frequency, hydraulic flushing intensity, critical water level, ultrafiltration membrane flux of the immersed ultrafiltration membrane component and continuous filtration time. The control panel is connected with the programmable controller through a signal wire or a wireless communication module; the wireless communication module is in a Bluetooth mode, a wifi mode, a power line carrier mode and the like. The control panel is preferably a computer human machine interface.
Preferably, the immersed ultrafiltration membrane component is a polyvinylidene fluoride hollow fiber membrane; the nominal aperture of the polyvinylidene fluoride hollow fiber membrane is 0.01-0.03 mu m, and a full-end filtration mode is adopted.
Preferably, the ultrafiltration membrane flux of the submerged ultrafiltration membrane component is 15-45L/(m)2·h)。
Further preferably, the emptying valve of the water production tank, the emptying valve of the ultrafiltration membrane pool, the water inlet regulating valve, the water inlet valve and the backwashing valve are all electrically operated valves.
The method for treating the polluted drinking water by using the immersed ultrafiltration membrane water purification treatment device comprises the following steps: 1) setting working conditions through a control panel, opening an automatic operation mode, filling polluted drinking water in a raw water tank, opening a water inlet valve 4 and a water inlet adjusting valve 2, starting a raw water pump 3, enabling the polluted drinking water to enter an ultrafiltration membrane tank 6 through a raw water pump 5, enabling water discharged from the ultrafiltration membrane tank 6 to enter a water production tank 8, starting the water inlet valve 4 if the water level of the ultrafiltration membrane tank 6 is lower than a critical water level, starting the raw water pump 3, and closing the water inlet valve 4 and stopping the raw water pump 3 if the water level of the ultrafiltration membrane tank 6 is higher than the critical water level; 2) adjusting the opening degree of the water inlet adjusting valve 4, adjusting the suction pump 7, enabling the ultrafiltration membrane flux of the immersed ultrafiltration membrane component to reach a set value within 30-60 seconds, and controlling the emptying valve of the water production tank and the emptying valve of the ultrafiltration membrane pool to be opened or closed by the programmable controller according to production requirements; 3) the cleaning system carries out hydraulic flushing on the immersed ultrafiltration membrane component according to the hydraulic flushing frequency, the hydraulic flushing intensity and the cleaning duration set by the programmable controller, and the immersed ultrafiltration membrane component is periodically stopped for maintenance cleaning.
The water quality indexes of the water include COD of 1.31-5.22 mg/L, average value of 2.543 mg/L, turbidity of 12.5-257NTU and average value of 2.543 mg/L52.62NTU；UV254Is 0.012-0.384cm-1Average value of 0.107cm-1The ammonia nitrogen content is 0-0.53 mg/L, the average value is 0.136 mg/L, the nitrite nitrogen content is 0.007-0.118 mg/L, and the average value is 0.068 mg/L.
As shown in figures 2-4, the immersed ultrafiltration membrane water purification device capable of adjusting the flux and continuous filtration time of the ultrafiltration membrane is adopted, the programmable controller adopts a CPU224 programmable controller of S7-200 series of Siemens company, the membrane material is PVDF, the molecular weight cut-off is 50kDa, a constant-flux full-end filtration mode is adopted, and the operation parameters are that the ultrafiltration operation flux is 15-45L/(m)2H), continuous filtration time of 0.5-2 hours, 2 weeks for 1 maintenance cleaning, sodium hypochlorite concentration of 200ppm, backwash dosing time of 2 minutes, soaking time of 30 minutes. The experimental results of the immersed ultrafiltration membrane water purification treatment device after 69 days of operation are shown in the following table 1.
TABLE 1 removal effect of immersion type ultrafiltration membrane water purification treatment device on pollutants in water
As can be seen from the data in Table 1, the device of the present invention is suitable for COD and UV254And the turbidity removal effect is obvious, and the removal rate reaches 52.62%, 62.00% and 99.67% respectively.
The utility model provides an influence of submergence formula milipore filter water purification unit play water quality of water is right with continuous filtration time to examine milipore filter flux respectively through the experiment below.
Setting the continuous filtering time to be 1 hour, emptying the water for 10 times, and investigating the influence of different ultrafiltration membrane fluxes on the effluent quality of the immersed ultrafiltration membrane water purification treatment device. The pollutant removal rate results are shown in fig. 5-7, which respectively show the COD and UV of the effluent water by different ultrafiltration membrane fluxes254And turbidity, with ultrafiltration membrane flux from 15L/(m)2H) increased to 45L/(m)2H), the retention rate of the immersed ultrafiltration membrane water purification device on organic pollutants is gradually reduced, the COD retention rate is reduced from 47.00% to 27.14%, and UV (ultraviolet) is adopted254Retention rateFrom 84.34% to 37.17%. This is primarily due to the fact that concentration polarization at the ultrafiltration membrane surface increases with increasing flux through the ultrafiltration membrane, allowing more contaminants to permeate through the ultrafiltration membrane. The result also shows that the turbidity removal effect cannot be obviously influenced by increasing the ultrafiltration membrane flux, and the turbidity removal rate of the immersed ultrafiltration membrane water purification treatment device is higher than 99% under different ultrafiltration membrane fluxes because of the excellent interception capability of the ultrafiltration membrane.
The flux of the ultrafiltration membrane is set to be 30L/(m)2H), the influence of different continuous filtering time on the effluent quality of the immersed ultrafiltration membrane water purification treatment device is examined. The results of the contaminant removal rates are shown in FIGS. 8-10, which show the COD and UV of the effluent for different continuous filtration times, respectively254And the effect of turbidity. As can be seen from FIGS. 8-10, the retention rate of the submerged ultrafiltration membrane water purification device on organic pollutants gradually decreases as the continuous filtration time increases from 0.5 hour to 2.0 hours, and the COD retention rate decreases from 51.39% to 26.20%, but UV is not increased254The retention rate showed a tendency of rising fluctuation, and when the continuous filtration time was increased from 0.5 hour to 1.0 hour, UV was observed254The removal rate is reduced from 65.68% to 29.02%; but when the continuous filtration time was further increased to 2.0 hours, UV254The removal rate increased to 86.53%. When examining the effect of the continuous filtration time on the turbidity removal effect, it was found that: in all experimental groups, the turbidity removal rate is higher than 99%, the experimental phenomenon is consistent with the observation of the influence of the flux of the ultrafiltration membrane on the turbidity removal effect, and further the ultrafiltration process has a good removal effect on large-size particulate matters in raw water, and the removal effect is not influenced by continuous filtration time.
Compared with the prior art, the immersed ultrafiltration membrane water purification treatment device for conventional drinking water pollution provided by the embodiment has the following characteristics: 1) the utility model provides an submergence formula milipore filter water purification unit process flow is simple, and area is little, has exerted ultrafiltration technology water purification ability separately, gets rid of jumbo size particulate matter, suspended solid and the organic pollutant of aquatic, makes to go out water and satisfies "life drinking water health standard", can fully ensure drinking water quality of water safety, and easy and simple to handle, easy going, the management is maintained conveniently. 2) The technological parameters such as the flux of the ultrafiltration membrane, the continuous filtration time and the like are properly adjusted according to the conditions such as the quality of raw water, the treated water quantity and the like, so that the device has stronger applicability, short flow and low operation energy consumption, and the discharged water can be directly drunk by adopting automatic control.
It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, and that modifications and substitutions based on the known art are intended to fall within the scope of the invention, which is defined by the claims and their equivalents. The details not described in the detailed description are prior art or common general knowledge.
Claims (8)
1. An immersed ultrafiltration membrane water purification treatment device for conventional drinking water pollution comprises: the system comprises a raw water tank, an ultrafiltration membrane pool, a water production tank, a cleaning system connected with the ultrafiltration membrane pool, an immersed ultrafiltration membrane component arranged in the ultrafiltration membrane pool, a water inlet pipeline communicated with the raw water tank and the ultrafiltration membrane pool, and a water production pipeline communicated with the ultrafiltration membrane pool and the water production tank, wherein the water production tank is provided with an emptying pipeline and a water production tank emptying valve; the device is characterized by further comprising a programmable controller, wherein a water inlet valve, a raw water pump and a water inlet adjusting valve are arranged on the water inlet pipeline, a suction pump and an online flowmeter are arranged on the water production pipeline, an ultrafiltration membrane pool emptying valve and an online liquid level meter are arranged on the ultrafiltration membrane pool, and the programmable controller is respectively connected with the raw water pump, the water inlet adjusting valve, the water inlet valve, the online flowmeter, the online liquid level meter, a water production tank emptying valve, the ultrafiltration membrane pool emptying valve and the suction pump.
2. The immersed ultrafiltration membrane water purification device for conventional drinking water pollution according to claim 1, wherein the cleaning system comprises a cleaning pipeline for connecting the water production tank and the ultrafiltration membrane tank, a backwashing pump and a backwashing valve which are arranged on the cleaning pipeline, a sodium hypochlorite storage tank and a dosing pump; the backwashing pump, the backwashing valve and the dosing pump are connected with the programmable controller.
3. The device for purifying water by using the immersed ultrafiltration membrane for the conventional pollution of drinking water as claimed in claim 2, wherein the continuous filtration time of the immersed ultrafiltration membrane component is 0.5-2 hours, and the cleaning system performs hydraulic flushing on the immersed ultrafiltration membrane component after the immersed ultrafiltration membrane component works for the continuous filtration time.
4. The device for purifying water by using the immersed ultrafiltration membrane for the conventional pollution of drinking water as claimed in claim 2, wherein the cleaning system is used for maintaining and cleaning the immersed ultrafiltration membrane component every 1-3 weeks, the sodium hypochlorite concentration in the sodium hypochlorite storage tank is 200ppm, the backwashing dosing time of the dosing pump is 1.5-2.5 minutes, and the soaking time of the immersed ultrafiltration membrane component is 20-40 minutes.
5. The device for purifying water by using the immersed ultrafiltration membrane for the conventional pollution of drinking water as claimed in claim 1, wherein the immersed ultrafiltration membrane component is a polyvinylidene fluoride hollow fiber membrane.
6. The device for purifying drinking water by using the submerged ultrafiltration membrane as claimed in claim 5, wherein the nominal pore diameter of the polyvinylidene fluoride hollow fiber membrane is 0.01-0.03 μm.
7. The device for purifying drinking water with the immersed ultrafiltration membrane, according to claim 1, is characterized by further comprising a control panel connected with the programmable controller, wherein the control panel is provided with a button for setting working conditions, and the working conditions comprise hydraulic flushing frequency, hydraulic flushing intensity, critical water level, ultrafiltration membrane flux of the immersed ultrafiltration membrane module and continuous filtration time.
8. The device for purifying water by using the immersed ultrafiltration membrane for the conventional pollution of the drinking water as claimed in claim 1, wherein the ultrafiltration membrane flux of the immersed ultrafiltration membrane component is 15-45L/(m)2·h)。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112174263A (en) * | 2020-11-10 | 2021-01-05 | 福州城建设计研究院有限公司 | Photocatalysis ultrafiltration purifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174263A (en) * | 2020-11-10 | 2021-01-05 | 福州城建设计研究院有限公司 | Photocatalysis ultrafiltration purifier |
| CN112174263B (en) * | 2020-11-10 | 2024-04-09 | 福州城建设计研究院有限公司 | Photocatalysis ultrafiltration water purification device |
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