CN114870634B - High-voltage electrostatic field enhanced film chemical cleaning system and method - Google Patents
High-voltage electrostatic field enhanced film chemical cleaning system and method Download PDFInfo
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- CN114870634B CN114870634B CN202210602756.8A CN202210602756A CN114870634B CN 114870634 B CN114870634 B CN 114870634B CN 202210602756 A CN202210602756 A CN 202210602756A CN 114870634 B CN114870634 B CN 114870634B
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- 239000000126 substance Substances 0.000 title claims abstract description 192
- 238000004140 cleaning Methods 0.000 title claims abstract description 183
- 230000005686 electrostatic field Effects 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 211
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 239000012528 membrane Substances 0.000 claims abstract description 61
- 239000003814 drug Substances 0.000 claims abstract description 51
- 238000012545 processing Methods 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 150000002500 ions Chemical class 0.000 claims description 16
- 238000005728 strengthening Methods 0.000 claims description 13
- 239000000706 filtrate Substances 0.000 claims description 7
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- 239000010865 sewage Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000010431 corundum Substances 0.000 claims description 3
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052627 muscovite Inorganic materials 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009471 action Effects 0.000 abstract description 6
- 239000003344 environmental pollutant Substances 0.000 abstract description 6
- 239000002245 particle Substances 0.000 abstract description 6
- 231100000719 pollutant Toxicity 0.000 abstract description 6
- 239000006185 dispersion Substances 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
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- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
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- 238000000746 purification Methods 0.000 description 1
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- 238000001223 reverse osmosis Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/22—Electrical effects
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a high-voltage electrostatic field intensified membrane chemical cleaning system and a method, comprising a membrane chemical cleaning water tank unit, a high-voltage electrostatic field bypass processing unit, a chemical cleaning pump unit, a cartridge filter and the like, wherein the high-voltage electrostatic field bypass processing unit consists of a high-voltage power supply, an ion rod, a flow cell and the like. Through a bypass circulation mode, the chemical cleaning liquid medicine is modified based on the action of a high-voltage electrostatic field, the cleaning effect of the chemical cleaning liquid medicine is enhanced, and the dissolving, carrying and removing effects of pollutants on the surface of the membrane are greatly enhanced; meanwhile, the high-voltage electrostatic field can effectively improve the dispersion performance of particles carried in the chemical cleaning liquid, and avoid redeposition and recontamination of scale-forming particles. By arranging the bypass circulation high-voltage electrostatic field treatment system which can be modularized and standardized, the chemical cleaning efficiency of the membrane system is effectively enhanced, and the operation stability and the chemical cleaning economy of the membrane system are improved.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to a high-voltage electrostatic field enhanced membrane chemical cleaning system and method.
Background
The membrane separation technology such as ultrafiltration and reverse osmosis has the advantages of simple operation, high purification efficiency, short construction period and the like, and is widely applied to water treatment systems in the industries such as electric power, chemical industry, municipal administration and the like. In the use process of the membrane system, pollutants in water can be deposited on the surface of the membrane to form scale, so that the flux of the membrane is reduced, chemical cleaning maintenance is required regularly, and the chemical cleaning liquid is generally acid, alkali, oxidant and the like.
In general, film chemical cleaning is performed repeatedly, the actual utilization rate of film chemical cleaning liquid medicine is not high in the process, the concentration, the temperature, the action time and other factors of the chemical cleaning liquid medicine are controlled, especially, the scale dissolving effect is greatly reduced after chemical cleaning is performed for a certain time, a large amount of scale cleaned on the surface of the film is dissolved in chemical cleaning liquid return, the cleaning capability of the chemical liquid medicine is greatly weakened when the scale is in a form of colloid, particulate matters and the like in the reflux liquid, meanwhile, the cleaned particulate matters, impurities and the like are deposited in a chemical cleaning water tank, and even further microbial pollution is further generated in the chemical cleaning water tank to influence the next film system cleaning.
How to efficiently realize the chemical cleaning of the membrane system and improve the chemical cleaning efficiency and the economical efficiency, thereby expanding the application range of the membrane system is a serious difficulty to be solved.
Disclosure of Invention
The invention aims to solve the problems that the actual utilization rate of film chemical cleaning liquid medicine is not high and particles, impurities and the like can be deposited in a chemical cleaning water tank in the prior art, and provides a high-voltage electrostatic field reinforced film chemical cleaning system and a high-voltage electrostatic field reinforced film chemical cleaning method.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the invention discloses a high-voltage electrostatic field enhanced membrane chemical cleaning system, which comprises a membrane chemical cleaning water tank unit, a high-voltage electrostatic field bypass processing unit and a cartridge filter unit, wherein the inlet is connected with a desalted water inlet and a membrane system chemical cleaning liquid inlet; the membrane chemical cleaning water tank unit includes: a chemical cleaning water tank; the chemical cleaning water tank is connected with a desalted water inlet and a chemical cleaning liquid inlet of the membrane system; the high-voltage electrostatic field bypass processing unit comprises a circulating water pump and a high-voltage electrostatic field device which are sequentially connected with a bypass system; the circulating water pump of the bypass system is connected with the chemical cleaning water tank; the high-voltage electrostatic field device is connected with the chemical cleaning water tank.
The improvement points of the invention are that:
further, the membrane chemical cleaning water tank unit also comprises a magnetic flap level meter, a sewage disposal manual valve, an electric heater, a temperature on-line monitor, a water inlet manual valve, a liquid medicine inlet manual valve, a chemical cleaning liquid medicine return manual valve, a manual medicine feeding port and a manhole; a sewage manual valve is arranged at the bottom of the chemical cleaning water tank; the side wall of the chemical cleaning water tank is provided with an electric heater; the magnetic flap level gauge is connected with the side wall of the chemical cleaning water tank; the temperature on-line monitor is arranged on the side wall of the chemical cleaning water tank and above the electric heater; the water inlet manual valve and the liquid medicine inlet manual valve are arranged at the top of the chemical cleaning water tank; the other end of the water inlet manual valve is connected with a desalted water inlet; the other end of the chemical liquid inlet manual valve is connected with a chemical cleaning chemical liquid inlet of the membrane system; the top of the chemical cleaning water tank is provided with a water inlet manual valve and a liquid medicine inlet manual valve; the other end of the water inlet manual valve is connected with a desalted water inlet; the other end of the chemical liquid inlet manual valve is connected with a chemical cleaning chemical liquid inlet of the membrane system; one end of the chemical cleaning liquid medicine liquid return manual valve is connected to the top of the chemical cleaning water tank, and the other end of the chemical cleaning liquid medicine liquid return manual valve is connected with a chemical cleaning return port of the membrane system; the manual dosing valve is arranged at the top of the chemical cleaning water tank; the manhole is arranged on the side wall of the chemical cleaning water tank.
Further, the magnetic flap liquid level meter is provided with an upper liquid inlet diaphragm valve and a lower liquid inlet diaphragm valve of the magnetic flap liquid level meter.
Further, the high-voltage electrostatic field bypass processing unit further comprises a bypass system water inlet valve, a circulating water pump outlet pressure gauge, a circulating water pump outlet check valve, a pH meter, a conductivity meter and a bypass system circulating water pump water outlet valve which are connected in sequence; the water inlet valve of the bypass system is connected between the circulating water pump of the bypass system and the chemical cleaning water tank; the outlet pressure gauge of the circulating water pump is connected with the circulating water pump of the bypass system; the bypass system circulating water pump outlet valve is connected with the high-voltage electrostatic field device; the high-voltage electrostatic field device further comprises a metal flow cell, an internal ion rod, a high-voltage power supply and a metal flow cell blow-down valve; one side of the metal flow cell is connected with a water outlet valve of a circulating water pump of the bypass system, and the other side of the metal flow cell is connected with a chemical cleaning water tank; the high-voltage electrostatic field device is a closed device consisting of a metal flow cell and an internal ion rod; the anode of the high-voltage power supply is connected with the internal ion rod, and the cathode of the high-voltage power supply is connected with the metal flow cell; the metal flow cell drain valve is connected with the bottom of the metal flow cell; the voltage of the high-voltage power supply is 0-60 kV, and the high-voltage power supply is continuously adjustable.
Further, the ion rod is composed of a central metal material and an outer-wrapping pressure-resistant insulating material; the central metal material of the inner ion rod is copper, titanium or aluminum; the outer-wrapping pressure-resistant insulating material is selected from polytetrafluoroethylene, corundum or muscovite.
Further, the chemical cleaning pump unit is also included; the chemical cleaning pump unit is connected between the chemical cleaning water tank and the cartridge filter; the chemical cleaning pump unit comprises a water inlet manual valve, a chemical cleaning pump, a water outlet pressure gauge, a water outlet check valve and a water outlet manual valve which are connected in sequence; the water inlet manual valve is connected with the chemical cleaning water tank.
Further, the filter further comprises a cartridge filter unit; the cartridge filter unit comprises an inlet pressure gauge, a cartridge filter, an outlet pressure gauge, a top exhaust valve, a bottom blow-down valve and a filtrate outlet valve; the cartridge filter is connected with a water outlet manual valve; the inlet pressure gauge is arranged between the water outlet manual valve and the cartridge filter; the top exhaust valve is connected with the top of the cartridge filter; the bottom blow-down valve is connected with the cartridge filter; the outlet pressure gauge is connected with the water outlet of the security filter; the filtrate outlet valve is connected between the outlet pressure gauge and the flowmeter.
Further, the cartridge filter is connected with a flow meter unit.
Further, a cleaning method of the high-voltage electrostatic field enhanced film chemical cleaning system comprises the following steps:
step one: preparing a chemical cleaning solution: the water inlet manual valve and the liquid medicine inlet manual valve are sequentially opened, or the manual medicine adding port is opened to automatically or manually add quantitative clean water and chemical medicine, chemical cleaning liquid medicine with required concentration is prepared, and the electric heater is started to control the temperature of the chemical cleaning liquid medicine to a proper temperature.
Step two: bypass high-voltage electrostatic field strengthening treatment: the water inlet valve of the bypass system and the water outlet valve of the circulating water pump of the high-pressure bypass system are sequentially opened, the bypass circulating water pump is started to carry out homogenizing circulation on the chemical cleaning liquid, meanwhile, the high-pressure power supply is started, the voltage of the high-pressure power supply is regulated, and the characteristics of the chemical liquid are monitored in real time by the aid of the pH meter and the conductivity meter.
Step three: performing chemical cleaning of a membrane system: after bypass high-voltage static strengthening treatment is carried out for a period of time, a water inlet manual valve and a water outlet manual valve are opened, a chemical cleaning pump is started, and chemical cleaning liquid medicine is filtered by a security filter and then enters a membrane system to be cleaned. The bypass high-voltage electrostatic field strengthening treatment unit continuously operates in the chemical cleaning process.
Step four: and (3) cleaning is finished: after chemical cleaning for a certain time, the chemical cleaning pump, the high-voltage power supply and the bypass circulating water pump are sequentially turned off, and the waste liquid after cleaning is emptied.
Further, the chemical cleaning water tank volume v= (2×v0×n+v1) × (1+α) the high-voltage electrostatic field bypass processing unit processes water volume q=v/T; wherein V is the volume of the chemical cleaning water tank; v0 is the single-branch membrane volume; v1 is the chemical cleaning loop pipeline volume; n is the number of membrane elements; alpha is the volume richness of the water tank and is 20% -40%; q is the water quantity treated by the bypass circulating water pump and the high-voltage electrostatic field device.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a film chemical cleaning system and a method which are enhanced by utilizing a high-voltage electrostatic field, wherein a chemical cleaning water tank is connected with a high-voltage electrostatic field bypass processing unit, a high-voltage electrostatic field device is arranged in the high-voltage electrostatic field bypass processing unit, chemical cleaning liquid medicine is processed by an internal ion rod and a high-voltage power supply through a metal flow cell in the high-voltage electrostatic field device, and after water molecules are subjected to the action of strong electric field energy under the action of the high-voltage electrostatic field, the center distance between positive and negative charges in the water molecules is increased, the dipole moment and the polarity are enhanced, and the hydration force with salt molecules is increased. Therefore, when the water molecules subjected to high-voltage electrostatic field strengthening treatment are enhanced in the binding and dissolving capacity of the membrane surface pollutants, the dissolving, carrying and cleaning effects of the membrane surface pollutants are greatly enhanced, and the running stability of a membrane system is improved. The high-voltage electrostatic field has super-strong electrochemical dispersion performance, realizes the modification of liquid medicine, enhances the dissolving capacity and polarity of the medicament in water, reduces the surface tension of the liquid medicine, and strengthens the dissolving effect of the liquid medicine on deep pollutants on the surface of the film and surface microbial contamination, thereby achieving the purposes of recycling the washing liquid and reducing the generation of sediment.
Furthermore, a cartridge filter is used before the membrane system is cleaned, so that particulate matters carried in the chemical cleaning liquid medicine are removed, and the membrane system is prevented from being damaged.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a system according to the present invention.
Wherein: 1-membrane chemical cleaning water tank unit, 1.1-chemical cleaning water tank, 1.2-magnetic flap level meter, 1.1.1-magnetic flap level meter upper liquid inlet diaphragm valve, 1.1.2-magnetic flap level meter lower liquid inlet diaphragm valve, 1.3-blowdown manual valve, 1.4-electric heater, 1.5-temperature on-line monitor, 1.6-water inlet manual valve, 1.7-liquid medicine inlet manual valve, 1.8-chemical cleaning liquid medicine return manual valve, 1.9-manual medicine inlet and 1.10-manhole; the device comprises a 2-high-voltage electrostatic field bypass processing unit, a 2.1-bypass system water inlet valve, a 2.2-bypass circulating water pump, a 2.3-circulating water pump outlet pressure gauge, a 2.4-circulating water pump outlet check valve, a 2.5-pH meter, a 2.6-conductivity meter, a 2.7-bypass system circulating water pump water outlet valve, a 2.8-high-voltage electrostatic field device, a 2.8.1-metal flow cell, a 2.8.2-internal ion rod, a 2.8.3-high-voltage power supply and a 2.8.4-metal flow cell blow-down valve; the device comprises a 3-chemical cleaning pump unit, a 3.1-water inlet manual valve, a 3.2-chemical cleaning pump, a 3.3-water outlet pressure gauge, a 3.4-water outlet + water check valve and a 3.5-water outlet manual valve; 4-cartridge filter unit, 4.1-inlet pressure gauge, 4.2-cartridge filter, 4.3-outlet pressure gauge, 4.4-top exhaust valve, 4.5-bottom blowdown valve; 4-6 filtrate outlet valve; 5-flowmeter unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
referring to fig. 1, the embodiment of the invention discloses a high-voltage electrostatic field enhanced membrane chemical cleaning system, which comprises a membrane chemical cleaning water tank unit 1, a high-voltage electrostatic field bypass processing unit 2, a chemical cleaning pump unit 3, a cartridge filter unit 4 and a flowmeter 5;
the membrane chemical cleaning tank unit 1 includes: 1.1 of a chemical cleaning water tank, 1.3 of a sewage manual valve, 1.4 of an electric heater, 1.6 of a water inlet manual valve, 1.7 of a liquid medicine inlet manual valve and 1.9 of a manual medicine inlet; the top of the chemical cleaning water tank 1.1 is provided with a water inlet manual valve 1.6, a liquid medicine inlet manual valve 1.7 and a manual medicine adding port 1.9; the other end of the water inlet manual valve 1.6 is connected with a desalted water inlet; the other end of the chemical liquid inlet manual valve 1.7 is connected with a chemical cleaning chemical liquid inlet of the membrane system; the side wall of the chemical cleaning water tank 1.1 is provided with an electric heater 1.4; a sewage disposal manual valve 1.3 is arranged at the bottom of the chemical cleaning water tank 1.1; the membrane chemical cleaning water tank unit 1 also comprises a magnetic flap level meter 1.2, a temperature on-line monitor 1.5, a chemical cleaning liquid medicine liquid return manual valve 1.8 and a manhole 1.10; the magnetic flap level gauge 1.2 is connected with the side wall of the chemical cleaning water tank 1.1; the temperature on-line monitor 1.5 is arranged on the side wall of the chemical cleaning water tank 1.1 and above the electric heater 1.4; one end of a chemical cleaning liquid medicine liquid return manual valve 1.8 is connected to the top of the chemical cleaning water tank 1.1, and the other end is connected with a chemical cleaning return port of the membrane system; the manhole 1.10 is arranged on the side wall of the chemical cleaning water tank 1.1. The magnetic flap liquid level meter 1.2 is provided with a magnetic flap liquid level meter upper liquid inlet diaphragm valve 1.2.1 and a magnetic flap liquid level meter lower liquid inlet diaphragm valve 1.2.2.
The high-voltage electrostatic field bypass processing unit 2 comprises a water inlet valve 2.1 of a bypass system, a circulating water pump 2.2 of the bypass system and a high-voltage electrostatic field device 2.8 which are sequentially connected; the water inlet valve 2.1 of the bypass system is connected with the chemical cleaning water tank 1.1; the high-voltage electrostatic field device 2.8 is connected with the chemical cleaning water tank 1.1; the high-voltage electrostatic field bypass processing unit 2 also comprises a metal flow cell 2.8.1, an internal ion rod 2.8.2, a high-voltage power supply 2.8.3 and a metal flow cell blow-down valve 2.8.4; one side of the metal flow cell 2.8.1 is connected with a circulating water pump outlet valve 2.7 of the bypass system, and the other side is connected with the chemical cleaning water tank 1.1; the high-voltage electrostatic field device 2.8 is a closed device consisting of a metal flow cell 2.8.1 and an internal ion rod 2.8.2; the positive electrode of the high-voltage power supply 2.8.3 is connected with the internal ion rod 2.8.2, and the negative electrode is connected with the metal flow cell 2.8.1; the metal flow-through cell drain valve 2.8.4 is connected with the bottom of the metal flow-through cell 2.8.1; the high-voltage electrostatic field strengthening membrane chemical cleaning system according to claim 1, wherein the high-voltage electrostatic field bypass processing unit 2 further comprises a circulating water pump outlet pressure gauge 2.3, a circulating water pump outlet check valve 2.4, a pH meter 2.5, a conductivity meter 2.6 and a bypass system circulating water pump outlet valve 2.7 which are connected in sequence; the outlet pressure gauge 2.3 of the circulating water pump is connected with the circulating water pump 2.2 of the bypass system; the bypass system circulating water pump outlet valve 2.7 is connected with the high-voltage electrostatic field device 2.8. The central metal material of the inner ion rod 2.8.2 is selected from copper, titanium, aluminum and the like, and the outer-wrapping pressure-resistant insulating material is selected from polytetrafluoroethylene, corundum, muscovite and the like; the voltage of the high-voltage power supply 2.8.3 is 0-60 kV, and the high-voltage power supply is continuously adjustable.
The chemical cleaning pump unit 3 comprises a water inlet manual valve 3.1, a chemical cleaning pump 3.2 and a water outlet manual valve 3.5 which are connected in sequence; the water inlet manual valve 3.1 is connected with the chemical cleaning water tank 1.1; the chemical cleaning pump unit 3 also comprises a water outlet pressure gauge 3.3 and a water outlet check valve 3.4. One end of the water outlet pressure gauge 3.3 is connected with the chemical cleaning pump 3.2, and the other end is connected with the water outlet check valve 3.4; the water outlet check valve is connected with a water outlet manual valve 3.5.
The cartridge filter unit 4 comprises a cartridge filter 4.2 and a bottom blow down valve 4.5; the cartridge filter 4.2 is connected with the water outlet manual valve 3.5; the bottom blow-down valve 4.5 is connected to the bottom of the cartridge filter 4.2; the cartridge filter unit 4 also comprises an inlet pressure gauge 4.1, an outlet pressure gauge 4.3, a top exhaust valve 4.4, a bottom blow-down valve 4.5 and a filtrate outlet valve 4.6; the inlet pressure gauge 4.1 is connected between the water outlet manual valve 3.5 and the cartridge filter 4.2; the top exhaust valve 4.4 is connected with the top of the cartridge filter 4.2; the bottom blow-down valve 4.5 is connected with the cartridge filter 4.2; the outlet pressure gauge 4.3 is connected with the water outlet of the cartridge filter 4.2; the filtrate outlet valve 4.6 is connected between the outlet pressure gauge 4.3 and the flow meter 5.
The flowmeter 5 is connected to a cartridge filter 4.2.
Chemical cleaning tank 1.1 volume v= (2×v0×n+v1) × (1+α); high voltage electrostatic field bypass processing unit output q=v/T. Wherein V is the volume of the chemical cleaning water tank; v0 is the single-branch membrane volume; n is the number of membrane elements; alpha is the volume richness of the water tank and is 20% -40%; q is the water quantity treated by the bypass circulating water pump and the high-voltage electrostatic field device; the time T=5-10 min for one cycle.
The working principle of the structure of the invention is as follows:
firstly, water molecules in a normal state exist in an association state, and under the action of a high-voltage electrostatic field, after the water molecules are subjected to the action of strong electric field energy, the center distance between positive and negative charges in the water molecules is increased, the dipole moment and polarity are enhanced, and the hydration force with salt molecules is increased. Therefore, when the water molecules subjected to high-voltage electrostatic field strengthening treatment are used for strengthening the binding and dissolving capacity of the membrane surface scale substances, the cleaning effect of the membrane surface scale pollution is effectively improved.
And secondly, the high-voltage electrostatic field has super-strong electrochemical dispersion performance, thereby realizing the modification of the liquid medicine, enhancing the dissolving capacity and polarity of the medicament in water, reducing the surface tension of the liquid medicine, and enhancing the dissolving effect of the liquid medicine on deep pollutants on the surface of the film and surface microbial pollution.
And thirdly, the chemical cleaning liquid back generally carries dissolved particles, and the particles can be uniformly dispersed in the chemical liquid through high-voltage electrostatic field treatment, so that redeposition and recontamination of the particles are avoided.
The working process of the invention is as follows:
step one: preparing a chemical cleaning solution: the water inlet manual valve 1.5 and the liquid medicine inlet manual valve 1.6 are sequentially opened, or a manual medicine adding port is opened to automatically or manually add quantitative clean water and chemical medicine, chemical cleaning liquid medicine with required concentration is prepared, and an electric heater 1.3 is started to control the temperature of the chemical cleaning liquid medicine to a proper temperature.
Step two: bypass high-voltage electrostatic field strengthening treatment: the water inlet valve 2.1 of the bypass system and the water outlet valve 2.7 of the circulating water pump of the high-pressure bypass system are sequentially opened, the bypass circulating water pump 2.2 is started to carry out homogenizing circulation on chemical cleaning liquid, meanwhile, the high-voltage power supply 2.8.3 is started, the voltage of the high-voltage power supply is regulated, and the characteristics of the chemical liquid are monitored in real time by the aid of the pH meter 2.5 and the conductivity meter 2.6.
Step three: performing chemical cleaning of a membrane system: after bypass high-voltage static strengthening treatment is carried out for a period of time, the water inlet manual valve 3.1 and the water outlet manual valve 3.4 are opened, the chemical cleaning pump 3 is started, and chemical cleaning liquid medicine is filtered by the security filter 4 and then enters the membrane system to be cleaned. The bypass high-voltage electrostatic field strengthening treatment unit continuously operates in the chemical cleaning process.
Step four: and (3) cleaning is finished: after chemical cleaning for a certain time, the chemical cleaning pump 3, the high-voltage power supply 2.8.3 and the bypass circulating water pump 2.2 are sequentially turned off, and the waste liquid after cleaning is emptied.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The method utilizes a high-voltage electrostatic field enhanced membrane chemical cleaning system, which comprises a demineralized water inlet, a membrane system chemical cleaning liquid inlet, a membrane chemical cleaning water tank unit (1), a high-voltage electrostatic field bypass processing unit (2) and a cartridge filter unit (4); the membrane chemical cleaning water tank unit (1) comprises: a chemical cleaning water tank (1.1); the chemical cleaning water tank (1.1) is connected with a desalted water inlet and a chemical cleaning liquid inlet of the membrane system; the high-voltage electrostatic field bypass processing unit (2) comprises a bypass circulating water pump (2.2) and a high-voltage electrostatic field device (2.8) which are sequentially connected; the bypass circulating water pump (2.2) is connected with the chemical cleaning water tank (1.1); the high-voltage electrostatic field device (2.8) is connected with the chemical cleaning water tank (1.1);
the high-voltage electrostatic field bypass processing unit (2) further comprises a bypass system water inlet valve (2.1), a circulating water pump outlet pressure gauge (2.3), a circulating water pump outlet check valve (2.4), a pH meter (2.5), a conductivity meter (2.6) and a bypass circulating water pump water outlet valve (2.7) which are connected in sequence; the water inlet valve (2.1) of the bypass system is connected between the bypass circulating water pump (2.2) and the chemical cleaning water tank (1.1); the outlet pressure gauge (2.3) of the circulating water pump is connected with the bypass circulating water pump (2.2); the bypass circulating water pump outlet valve (2.7) is connected with the high-voltage electrostatic field device (2.8); the high-voltage electrostatic field device (2.8) further comprises a metal flow cell (2.8.1), an internal ion rod (2.8.2), a high-voltage power supply (2.8.3) and a metal flow cell drain valve (2.8.4); one side of the metal flow cell (2.8.1) is connected with a bypass circulating water pump outlet valve (2.7), and the other side of the metal flow cell is connected with a chemical cleaning water tank (1.1); the high-voltage electrostatic field device (2.8) is a closed device consisting of a metal flow cell (2.8.1) and an internal ion rod (2.8.2); the positive electrode of the high-voltage power supply (2.8.3) is connected with the internal ion rod (2.8.2), and the negative electrode of the high-voltage power supply is connected with the metal flow cell (2.8.1); the metal flow cell drain valve (2.8.4) is connected with the bottom of the metal flow cell (2.8.1); the voltage of the high-voltage power supply (2.8.3) is 0-60 kV, and the high-voltage power supply is continuously adjustable;
the inner ion rod (2.8.2) is made of a central metal material and an outer-wrapping pressure-resistant insulating material; the central metal material of the inner ion rod (2.8.2) is copper, titanium or aluminum; the outer-wrapping pressure-resistant insulating material is polytetrafluoroethylene, corundum or muscovite;
characterized in that the method comprises the steps of:
step one: preparing a chemical cleaning solution: sequentially opening a first water inlet manual valve (1.6), a liquid medicine inlet manual valve (1.7) or a manual medicine adding port (1.9) to automatically or manually add quantitative clean water and chemical medicine, preparing chemical cleaning liquid with required concentration, and starting an electric heater (1.4) to control the temperature of the chemical cleaning liquid to a proper temperature;
step two: bypass high-voltage electrostatic field strengthening treatment: sequentially opening a water inlet valve (2.1) of a bypass system and a water outlet valve (2.7) of a high-pressure bypass circulating water pump, starting a bypass circulating water pump (2.2) to carry out homogenizing circulation on chemical cleaning liquid, starting a high-voltage power supply (2.8.3), regulating the voltage of the high-voltage power supply, and monitoring the characteristics of the chemical liquid in real time by using a pH meter (2.5) and a conductivity meter (2.6);
step three: performing chemical cleaning of a membrane system: after bypass high-voltage electrostatic strengthening treatment is carried out for a period of time, a second water inlet manual valve (3.1) and a water outlet manual valve (3.5) are opened, a chemical cleaning pump (3.2) is started, and chemical cleaning liquid medicine is filtered by a cartridge filter unit (4) and enters a membrane system to be cleaned; the bypass high-voltage electrostatic field strengthening treatment unit continuously operates in the chemical cleaning process;
step four: and (3) cleaning is finished: after chemical cleaning for a certain time, the chemical cleaning pump (3.2), the high-voltage power supply (2.8.3) and the bypass circulating water pump (2.2) are sequentially turned off, and the waste liquid after cleaning is emptied.
2. The high-voltage electrostatic field enhanced membrane chemical cleaning method according to claim 1, wherein the membrane chemical cleaning water tank unit (1) further comprises a magnetic flap level meter (1.2), a pollution discharge manual valve (1.3), an electric heater (1.4), a temperature on-line monitor (1.5), a first water inlet manual valve (1.6), a chemical liquid inlet manual valve (1.7), a chemical cleaning chemical liquid return manual valve (1.8), a manual chemical feeding port (1.9) and a manhole (1.10); a sewage disposal manual valve (1.3) is arranged at the bottom of the chemical cleaning water tank (1.1); an electric heater (1.4) is arranged on the side wall of the chemical cleaning water tank (1.1); the magnetic flap level meter (1.2) is connected with the side wall of the chemical cleaning water tank (1.1); the temperature on-line monitor (1.5) is arranged on the side wall of the chemical cleaning water tank (1.1) and above the electric heater (1.4); the first water inlet manual valve (1.6) and the liquid medicine inlet manual valve (1.7) are arranged at the top of the chemical cleaning water tank (1.1); the other end of the first water inlet manual valve (1.6) is connected with a desalted water inlet; the other end of the chemical liquid inlet manual valve (1.7) is connected with a chemical cleaning chemical liquid inlet of the membrane system; one end of the chemical cleaning liquid medicine liquid return manual valve (1.8) is connected to the top of the chemical cleaning water tank (1.1), and the other end of the chemical cleaning liquid medicine liquid return manual valve is connected with a chemical cleaning return port of the membrane system; the manual dosing port (1.9) is arranged at the top of the chemical cleaning water tank (1.1); the manhole (1.10) is arranged on the side wall of the chemical cleaning water tank (1.1).
3. The chemical cleaning method for the high-voltage electrostatic field enhanced membrane according to claim 2 is characterized in that a magnetic flap liquid level meter (1.2) is provided with an upper liquid inlet diaphragm valve (1.2.1) of the magnetic flap liquid level meter and a lower liquid inlet diaphragm valve (1.2.2) of the magnetic flap liquid level meter.
4. A high-voltage electrostatic field enhanced membrane chemical cleaning method according to claim 1, further comprising a chemical cleaning pump unit (3); the chemical cleaning pump unit (3) is connected between the chemical cleaning water tank (1.1) and the cartridge filter (4.2); the chemical cleaning pump unit (3) comprises a second water inlet manual valve (3.1), a chemical cleaning pump (3.2), a water outlet pressure gauge (3.3), a water outlet check valve (3.4) and a water outlet manual valve (3.5) which are connected in sequence; the second water inlet manual valve (3.1) is connected with the chemical cleaning water tank (1.1).
5. A method of chemical cleaning of high voltage electrostatic field enhanced membranes according to claim 1, further comprising a cartridge filter unit (4); the cartridge filter unit (4) comprises an inlet pressure gauge (4.1), a cartridge filter (4.2), an outlet pressure gauge (4.3), a top exhaust valve (4.4), a bottom blow-down valve (4.5) and a filtrate outlet valve (4.6); the cartridge filter (4.2) is connected with a water outlet manual valve (3.5); the inlet pressure gauge (4.1) is arranged between the water outlet manual valve (3.5) and the cartridge filter (4.2); the top exhaust valve (4.4) is connected with the top of the cartridge filter (4.2); the bottom blow-down valve (4.5) is connected with the cartridge filter (4.2); the outlet pressure gauge (4.3) is connected with the water outlet of the security filter (4.2); the filtrate outlet valve (4.6) is connected between the outlet pressure gauge (4.3) and the flowmeter unit (5).
6. A method of chemical cleaning of high voltage electrostatic field enhanced membranes according to claim 1 or 5, characterized in that said cartridge filter (4.2) is connected with a flow meter unit (5).
7. The high-voltage electrostatic field enhanced film chemical cleaning method according to claim 1, wherein the chemical cleaning water tank (1.1) has a volume v= (2×v0×n+v1) × (1+α); the high-voltage electrostatic field bypass processing unit (2) processes water quantity Q=V/T; wherein V is the volume of the chemical cleaning water tank; v0 is the single-branch membrane volume; v1 is the chemical cleaning loop pipeline volume; n is the number of membrane elements; alpha is the volume richness of the water tank and is 20% -40%; q is the water quantity treated by the bypass circulating water pump and the high-voltage electrostatic field device.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814123A (en) * | 2012-09-12 | 2012-12-12 | 西安兴仪启动发电试运有限公司 | Reverse osmosis membrane chemical cleaning method |
| CN207792831U (en) * | 2018-01-04 | 2018-08-31 | 岳阳绿盾环保科技有限公司 | High-pressure electrostatic circulation water treating device |
| CN211847281U (en) * | 2019-12-18 | 2020-11-03 | 北京美亚恒远水处理科技有限公司 | High-voltage electrostatic circulating water treatment equipment |
| CN215996229U (en) * | 2021-05-31 | 2022-03-11 | 鄂尔多斯市安信泰环保科技有限公司 | Membrane belt cleaning device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1820001A (en) * | 1999-10-12 | 2001-04-23 | M. Michael Pitts Jr. | Electrostatic enhancement for membrane-separation systems |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814123A (en) * | 2012-09-12 | 2012-12-12 | 西安兴仪启动发电试运有限公司 | Reverse osmosis membrane chemical cleaning method |
| CN207792831U (en) * | 2018-01-04 | 2018-08-31 | 岳阳绿盾环保科技有限公司 | High-pressure electrostatic circulation water treating device |
| CN211847281U (en) * | 2019-12-18 | 2020-11-03 | 北京美亚恒远水处理科技有限公司 | High-voltage electrostatic circulating water treatment equipment |
| CN215996229U (en) * | 2021-05-31 | 2022-03-11 | 鄂尔多斯市安信泰环保科技有限公司 | Membrane belt cleaning device |
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