CN110240231B - Fluid purification system and purification method - Google Patents
Fluid purification system and purification method Download PDFInfo
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- CN110240231B CN110240231B CN201910574630.2A CN201910574630A CN110240231B CN 110240231 B CN110240231 B CN 110240231B CN 201910574630 A CN201910574630 A CN 201910574630A CN 110240231 B CN110240231 B CN 110240231B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/4608—Treatment of water, waste water, or sewage by electrochemical methods using electrical discharges
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention discloses a fluid purification system and a purification method, which relate to the field of sewage and waste liquid purification and comprise a purification device, the purification device comprises a purification unit which is provided with a condenser and a containing structure, one or more circulation capacitors which are electrically connected in series or in parallel are accommodated in the accommodating structure, salt, ammonia and other polarized pollutants in the solution are removed in an ionization mode, the purification unit is washed twice by matching a hydraulic system with a storage tank, the reactivation effect on the purification unit is achieved, ionized particles separated by ionization are collected, the first washing liquid and the second washing liquid in the system are both sourced from a supply source, clean liquid does not need to be introduced from the outside, and filtering substances do not need to be used.
Description
Technical Field
The invention relates to the field of sewage and waste liquid purification, in particular to a fluid purification system and a purification method.
Background
Along with the increasing attention on environmental protection, the requirements of various places on the discharge of industrial sewage and waste liquid are more and more strict, so that enterprises often need to purify the sewage and waste liquid before discharging, and various sewage and waste liquid purifying devices and methods are produced at the same time.
At present, most of sewage and waste liquid are purified at a high cost, secondary pollution can be caused by purification equipment, most of sewage and waste liquid are purified only by pure decontamination and cannot be recycled, and the cost is increased and the sustainable development concept is violated.
In particular, for chemical plants and other industries, the waste water produced in industrial processes is not only large in volume, but also contains a large amount of chloride, sulfate, nitrate, nitrite, ammonia and other polarized pollutants, which are themselves materials required by chemical plants.
Disclosure of Invention
The invention aims to provide a fluid purification system and a purification method, wherein a purification unit is arranged, salt, ammonia and other polarized pollutants, chemical substances, organic substances or micro-pollutants in a solution are removed in an ionization mode, and the purification unit is washed twice by matching a hydraulic system with a storage tank, so that the purification unit is reactivated, ionized particles separated by ionization are collected, and liquid containing the ionized particles with high concentration is recovered into the storage tank, so that the subsequent discharge and reuse are facilitated.
A fluid purification system and a purification method, comprising a purification device, wherein the purification device comprises a purification unit, the purification unit is provided with a containing structure, one or more circulation capacitors which are electrically connected together in series or in parallel are contained in the containing structure, fluid to be treated can flow between electrodes of the circulation capacitors, the purification unit is also electrically connected to a DC power supply, the DC power supply is connected to the electrodes of the circulation capacitors through a control circuit provided with a controller, a conductive layer of the electrodes of the circulation capacitors is provided with a plurality of surface holes, and the surface holes provide attachment surfaces for exchanging with liquid;
the purification device also comprises a hydraulic system feeding the purification unit with the fluid to be treated through a supply conduit which takes the raw liquid untreated from a supply source and is intercepted by a first solenoid valve, the raw liquid passing through the purification unit being conveyed into an extraction conduit, the extraction conduit being subdivided into a service branch intercepted by a second solenoid valve for conveying the treated raw liquid and an evacuation branch intercepted by a third solenoid valve for conveying the first washing flow and the second washing flow;
still include the holding vessel among the purification apparatus, the holding vessel is connected to the supply line at the exit through the pipeline by fourth solenoid valve intercepting hydraulic pressure, the last circulating pump that is provided with of pipeline, the holding vessel still is connected to the branch of managing to find time at the input, and the holding vessel still connects the delivery pipe by fifth valve intercepting.
Preferably, said flow-through capacitor 4 is provided in turn with two or more superposed electrodes facing each other, either as flat circular sheets or as flat cylinders wound up.
Preferably, an isolating layer is arranged between the electrodes of the flow-through capacitor 4, and the isolating layer is made of an insulating porous synthetic material or a fiber material, including but not limited to glass or nylon fabric.
Preferably, the circulation pump 70 can also be provided on the evacuation branch 9 to extract the first and second washing liquids from the purification unit 2 and send them to the storage tank 12.
Preferably, a method of purifying a fluid, comprising: the method comprises the following steps:
the method comprises the following steps: the method comprises the steps of firstly enabling a circulation capacitor 4 to be in a charging stage through a control circuit, enabling the circulation capacitor 4 in a purification unit 2 to be loaded and to reach a desired working voltage, entering the working stage, then enabling a first electromagnetic valve 6 and a second electromagnetic valve 10 to be opened, enabling a third electromagnetic valve 11 and a fourth electromagnetic valve 14 to be closed, enabling stock solution in a supply source 100 to flow to the purification unit 2 through a supply pipeline 5, enabling the circulation capacitor 4 of the purification unit 2 to be in the working stage, enabling ionized particles to be attracted by corresponding electrodes with opposite polarities to the ionized particles, enabling the ionized particles to be gradually accumulated on the same electrodes, and enabling purification of the stock solution to occur;
step two: as the purification proceeds, once the electrodes of the flow-through capacitor 4 reach program saturation, the fluid will have polarized particles and then enter a regeneration phase during which the first solenoid valve 6 and the third solenoid valve 11 are closed and the second solenoid valve 10 and the fourth solenoid valve 14 are opened, the first washing flow exits from the storage tank 12 and enters the supply line 5, forcing the purified stock solution contained in the purification unit 2 and in the extraction line 7 to flow towards the service branch 8, then all the valves are closed;
step three: the circulation capacitor 4 is again in the discharging phase through the control circuit, then the third electromagnetic valve 11 and the fourth electromagnetic valve 14 are opened and the first electromagnetic valve 6 and the second electromagnetic valve 10 are kept closed, the first washing flow leaves the storage tank 12, passes through the purification unit 2, removes the ionized particles accumulated on the electrodes, and is conveyed back to the storage tank 12 to perform the first washing flow circulation;
step four: after a period of time of circulation of the first washing stream, with the second solenoid valve 10 and the fourth solenoid valve 14 closed and the first solenoid valve 6 and the third solenoid valve 11 open, the supply source 100 flows out the dope as a second washing stream which flows through the supply line 5 towards the purification unit 2 until flowing back into the storage tank 12 through the evacuation branch 9, which second washing stream is able to replace the first washing stream present in high concentration of ionized particles in the purification unit 2 and which is also able to remove the residual ionized particles still present on the electrodes of the flow-through capacitor 4;
step five: and finally, enabling the circulation capacitor 4 to be in a voltage-free stage for a period of time through the control circuit, then entering a charging stage again, waiting for the circulation capacitor 4 in the purification unit 2 to be loaded and enabling the circulation capacitor 4 to reach the expected working voltage, entering a working stage, then opening the first electromagnetic valve 6 and the second electromagnetic valve 10, closing the third electromagnetic valve 11 and the fourth electromagnetic valve 14, and purifying the stock solution again.
Preferably, when the liquid in the storage tank 12 reaches a certain level, or after a certain time interval is set and the time interval is reached, the fifth valve 16 is opened to discharge the liquid containing the ionized particles at a certain flow rate.
Preferably, the second washing liquid flow rate to the storage tank 12 is substantially equal to the flow rate of the concentrated fluid discharged from the storage tank 12 through the discharge pipe 15, which is set to less than 5%, most preferably to 2%, of the total flow rate of the fluid treated and purified from the purification unit 2.
The invention has the advantages that: the purification system is provided with a purification unit, salt, ammonia and other polarized pollutants in the solution are removed by adopting an ionization mode, chemical substances, organic substances or micro-pollutants are also washed twice by matching a hydraulic system with a storage tank, the reactivation effect on the purification unit is achieved, ionized particles precipitated by ionization are collected, and liquid containing high-concentration ionized particles is recovered into the storage tank, so that the subsequent discharge and reutilization are facilitated.
Drawings
FIG. 1 is a schematic diagram of the structure of the device of the present invention;
FIG. 2 is a flow chart of the purification method of the present invention;
wherein, 1, purifier, 2, purification unit, 3, containment structure, 4, circulation electric capacity, 5, supply pipe, 6, first solenoid valve, 7, extraction pipe, 8, service branch, 9, the branch of managing to find time, 10, second solenoid valve, 11, third solenoid valve, 12, holding vessel, 13, pipeline, 14, fourth solenoid valve, 15, discharge line, 16, fifth valve, 36, DC power, 70, circulating pump, 100, supply source.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 2, a fluid purification system and purification method comprises a purification device 1, wherein the purification device 1 comprises a purification unit 2, the purification unit 2 is equipped with a containing structure 3, the containing structure 3 contains one or more circulation capacitors 4 electrically connected together in series or in parallel, fluid to be treated can flow between the electrodes of the circulation capacitors 4, the purification unit 2 is also electrically connected to a DC power supply 36, the DC power supply 36 is connected to the electrodes of the circulation capacitors 4 through a control circuit provided with a controller, the conductive layer of the electrodes of the circulation capacitors 4 has a plurality of surface holes, and the surface holes provide attachment surfaces for exchanging with liquid; the material constituting the conductive layer may be any material known for electrochemical processes of the flow-through capacitor 4, for example spongy activated carbon.
The size, shape and distribution of the layers of conductive material constituting the electrodes or the size of the layers of separator material interposed between the electrodes do not form the subject of the particular claims and will not be described in detail since they are well known to a person skilled in the art.
Also included in the purification device 1 is a hydraulic system feeding the purification unit 2 with the fluid to be treated through a supply conduit 5, the supply conduit 5 taking untreated raw liquid from a supply source 100 and intercepted by a first solenoid valve 6, the raw liquid being conveyed, after passing through the purification unit 2, into an extraction conduit 7, the extraction conduit 7 being subdivided into a service branch 8 and an evacuation branch 9, the service branch 8 being intercepted by a second solenoid valve 10 for conveying treated raw liquid, the evacuation branch 9 being intercepted by a third solenoid valve 11 for conveying a first washing flow and a second washing flow;
also included in the purification apparatus 1 is a storage tank 12, said storage tank 12 being hydraulically connected at the outlet to the supply pipe 5 by means of a delivery pipe 13 intercepted by a fourth solenoid valve 14, said delivery pipe 13 being provided with a circulation pump 70, said storage tank 12 being further connected at the input to the evacuation branch 9, and the storage tank 12 being further connected to a discharge pipe 15 intercepted by a fifth valve 16. Adopt the mode of ionization to get rid of the salt in the solution, ammonia and other polarization pollutants, and chemical substance, organic matter or micropollutant, still carry out twice washing to purifying element 2 through hydraulic system cooperation holding vessel 12, both play the effect of reactivation to purifying element 2, the ionization particle of ionization out has been collected again, and retrieve into holding vessel 12 with the liquid that contains the ionization particle of high concentration, be convenient for follow-up discharge and reuse, first washing liquid and second washing liquid all derive from supply 100 in this system, need not follow the external clean liquid that introduces, also need not use filter material.
The flow-through capacitor 4 is in turn provided with two or more superposed electrodes facing each other, either as flat circular sheets or as flat cylinders wound up. The ionized particles are convenient to collect.
And an isolating layer is arranged between the electrodes of the flow-through capacitor 4, and the isolating layer is made of an insulating porous synthetic material or a fiber material, including but not limited to glass or nylon fabric. The isolation layer can isolate the electrodes that allow fluid to flow through.
The circulation pump 70 can also be arranged on the evacuation branch 9 to extract the first and second washing liquid from the purification unit 2 and send them to the storage tank 12. The arrangement position of the circulating pump 70 can be flexibly adjusted.
A method of purifying a fluid, comprising: the method comprises the following steps:
the method comprises the following steps: the method comprises the steps of firstly enabling a circulation capacitor 4 to be in a charging stage through a control circuit, enabling the circulation capacitor 4 in a purification unit 2 to be loaded and to reach a desired working voltage, entering the working stage, then enabling a first electromagnetic valve 6 and a second electromagnetic valve 10 to be opened, enabling a third electromagnetic valve 11 and a fourth electromagnetic valve 14 to be closed, enabling stock solution in a supply source 100 to flow to the purification unit 2 through a supply pipeline 5, enabling the circulation capacitor 4 of the purification unit 2 to be in the working stage, enabling ionized particles to be attracted by corresponding electrodes with opposite polarities to the ionized particles, enabling the ionized particles to be gradually accumulated on the same electrodes, and enabling purification of the stock solution to occur;
step two: as the purification proceeds, once the electrodes of the flow-through capacitor 4 reach program saturation (i.e. saturation, in which the capacity of the electrodes to adsorb ions is greatly reduced), polarized particles are present in the fluid, which then enters a regeneration phase, during which the first solenoid valve 6 and the third solenoid valve 11 are closed and the second solenoid valve 10 and the fourth solenoid valve 14 are opened, the first washing flow exits from the storage tank 12 and enters the supply conduit 5, the purified raw liquid contained in the purification unit 2 and in the extraction conduit 7 is forced to flow towards the service branch 8, and then all the valves are closed;
step three: the circulation capacitor 4 is again in the discharging phase through the control circuit, then the third electromagnetic valve 11 and the fourth electromagnetic valve 14 are opened and the first electromagnetic valve 6 and the second electromagnetic valve 10 are kept closed, the first washing flow leaves the storage tank 12, passes through the purification unit 2, removes the ionized particles accumulated on the electrodes, and is conveyed back to the storage tank 12 to perform the first washing flow circulation;
step four: after a period of time of circulation of the first washing flow, with the second solenoid valve 10 and the fourth solenoid valve 14 closed and the first solenoid valve 6 and the third solenoid valve 11 open, the supply source 100 flows out the dope as a second washing flow, which flows through the supply pipe 5 towards the purification unit 2 until flowing back into the storage tank 12 through the evacuation branch 9, which is able to replace in the purification unit 2 the first washing flow present in high concentration of ionized particles and which is also able to remove the residual ionized particles still present on the electrodes of the circulation capacitor 4;
step five: and finally, enabling the circulation capacitor 4 to be in a voltage-free stage for a period of time through the control circuit, then entering a charging stage again, waiting for the circulation capacitor 4 in the purification unit 2 to be loaded and enabling the circulation capacitor 4 to reach the expected working voltage, entering a working stage, then opening the first electromagnetic valve 6 and the second electromagnetic valve 10, closing the third electromagnetic valve 11 and the fourth electromagnetic valve 14, and purifying the stock solution again.
A charging phase, in which the flow-through capacitance 4 in the purification unit 2 is loaded and brought to a desired operating voltage, for example equal to 1.6V, and an operating phase, in which the fluid flow to be treated is forced to pass in the case of the loaded electrodes, the flow-through capacitance 4 of the purification unit 2 during the operating phase, as the ionized particles are attracted by the respective electrodes having their opposite polarity, causing a gradual accumulation of the ionized particles on the same electrodes, so that purification of the fluid from the polarized particles takes place.
The unit cycle (unit cycle: the system performs a stock solution purification-a purification unit wash-then stock solution purification) also provides a regeneration phase to reach the polarized particles present in the fluid once the process saturation of the electrodes is reached. During this phase, with the electrodes deactivated, the washing liquid is forced into the purification unit 2, subsequently removing the ionized particles accumulated on the electrodes.
When the liquid in the storage tank 12 reaches a horizontal quota (the storage tank 12 is provided with a corresponding liquid level sensor, but the liquid level in the storage tank 12 reaches a specified height, namely the horizontal quota is reached), or after an interval time is set and the interval time is reached, the fifth valve 16 is opened to discharge the liquid containing high-concentration ionized particles in the storage tank 12 at a certain flow rate. And recycling is carried out.
The flow rate of the second washing liquid to the storage tank 12 is substantially equal to the flow rate of the concentrated fluid discharged from the storage tank 12 through the discharge pipe 15, which is set to less than 5%, most preferably to 2%, of the total flow rate of the fluid treated and purified from the purification unit 2. The second washing liquid replaces the liquid containing the ionized particles at a high concentration in the storage tank 12, and is used as the first washing liquid when the purification unit 2 is washed next time.
The specific implementation mode and principle are as follows:
before purifying the stock solution in the supply source 100, the flow-through capacitor 4 is put into a charging phase by means of a control circuit, after the flow-through capacitor 4 in the purification unit 2 is loaded and brought to a desired operating voltage, about 1.6V, into an operating phase, then the first solenoid valve 6 and the second solenoid valve 10 are opened and the third solenoid valve 11 and the fourth solenoid valve 14 are closed, the stock solution in the supply source 100 flows to the purification unit 2 through the supply conduit 5, the flow-through capacitor 4 of the purification unit 2 is during the operating phase, so that the ionized particles are attracted by the respective electrodes having the opposite polarity to them, causing a gradual accumulation of the ionized particles on the same electrodes, and thus a purification of the stock solution takes place;
as the purification proceeds, once the electrodes of the flow-through capacitor 4 reach program saturation, polarized particles are present in the fluid, which then enters the regeneration phase, during this phase, first the first solenoid valve 6 and the third solenoid valve 11 are closed and the second solenoid valve 10 and the fourth solenoid valve 14 are opened, the first washing flow flows out of the storage tank 12 and into the supply conduit 5, forcing the flow of the purified stock solution contained in the purification unit 2 and in the extraction conduit 7 towards the service branch 8, then all valves are closed, the circulation capacitor 4 is in the discharging stage again through the control circuit, the third solenoid valve 11 and the fourth solenoid valve 14 are then opened and the first solenoid valve 6 and the second solenoid valve 10 remain closed, the first washing flow leaves the storage tank 12, passes through the purification unit 2, removes the ionized particles accumulated on the electrodes and is sent back to the storage tank 12, carrying out the first washing flow cycle;
after the first washing flow is circulated for a certain period of time, the second solenoid valve 10 and the fourth solenoid valve 14 are closed and the first solenoid valve 6 and the third solenoid valve 11 are opened, the supply source 100 flows out the raw liquid as the second washing flow which flows toward the purification unit 2 through the supply pipe 5 until it flows back into the storage tank 12 through the evacuation branch 9, the second washing flow can replace the first washing flow existing in the high concentration ionized particles in the purification unit 2 and it can also remove the residual ionized particles still existing on the electrodes of the circulation capacitor 4, when the liquid in the storage tank 12 reaches the horizontal quota, or after the interval time is set and reached, the fifth valve 16 is opened to discharge the ionized particle liquid containing the high concentration inside the storage tank 12 at a flow rate substantially equal to the flow rate of the concentrated fluid discharged from the storage tank 12 through the discharge pipe 15, this flow rate is set to less than 5%, most preferably to 2%, of the total flow rate of the fluid treated and purified from the purification unit 2;
and finally, enabling the circulation capacitor 4 to be in a voltage-free stage for a period of time through the control circuit, then entering a charging stage again, waiting for the circulation capacitor 4 in the purification unit 2 to be loaded and enabling the circulation capacitor 4 to reach the expected working voltage, entering a working stage, then opening the first electromagnetic valve 6 and the second electromagnetic valve 10, closing the third electromagnetic valve 11 and the fourth electromagnetic valve 14, and purifying the stock solution again.
Based on the above, the invention is provided with the purification unit 2, the purification unit 2 is used for removing salt, ammonia and other polarized pollutants, chemical substances, organic substances or micro-pollutants in the solution in an ionization mode, and the purification unit 2 is washed twice by matching a hydraulic system with the storage tank 12, so that the reactivation effect on the purification unit 2 is achieved, ionized particles separated by ionization are collected, and the liquid containing the ionized particles with high concentration is recovered into the storage tank 12 for subsequent discharge and reuse.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (3)
1. A fluid purification system, characterized in that it comprises a purification device (1), in which purification device (1) there is included a purification unit (2), said purification unit (2) being equipped with a containment structure (3), inside said containment structure (3) there being housed one or more circulation capacitors (4) electrically connected together in series or in parallel, between the electrodes of which circulation capacitors (4) the fluid to be treated is able to flow, and the purification unit (2) being further electrically connected to a DC power supply (36), said DC power supply (36) being connected to the electrodes of the circulation capacitors (4) through a control circuit provided with a controller, the conductive layers of the electrodes of the circulation capacitors (4) having a number of surface holes providing an attachment surface in exchange with the fluid;
the purification device (1) also comprises a hydraulic system feeding the purification unit (2) with the fluid to be treated through a supply conduit (5), the supply conduit (5) taking the untreated raw liquor from a supply source (100) and being intercepted by a first solenoid valve (6), the raw liquor passing through the purification unit (2) being conveyed into an extraction conduit (7), the extraction conduit (7) being subdivided into a service branch (8) and an evacuation branch (9), the service branch (8) being intercepted by a second solenoid valve (10) for conveying the treated raw liquor, the evacuation branch (9) being intercepted by a third solenoid valve (11) for conveying a first washing flow and a second washing flow;
the purification device (1) further comprises a storage tank (12), the storage tank (12) is hydraulically connected to the supply pipe (5) at an outlet through a delivery pipe (13) intercepted by a fourth solenoid valve (14), a circulation pump (70) is arranged on the delivery pipe (13), the storage tank (12) is further connected to the evacuation branch (9) at an input end, and the storage tank (12) is further connected to a discharge pipe (15) intercepted by a fifth valve (16);
the flow-through capacitor (4) is in turn provided with two or more superposed electrodes facing each other, either in the form of flat circular sheets or in the form of flat cylinders wound up, between the electrodes of the flow-through capacitor (4) there being interposed a separation layer made of insulating porous synthetic or fibrous material, including but not limited to glass or nylon fabric, the circulation pump (70) being able to be arranged on the evacuation branch (9) to extract the first and second washing liquids from the purification unit (2) and send them to the storage tank (12);
the fluid purification method of the purification system comprises the following steps:
the method comprises the following steps: the method comprises the steps that firstly, a circulation capacitor (4) is in a charging stage through a control circuit, after the circulation capacitor (4) in a purification unit (2) is loaded and reaches a desired working voltage, the operation stage is carried out, then a first electromagnetic valve (6) and a second electromagnetic valve (10) are opened, a third electromagnetic valve (11) and a fourth electromagnetic valve (14) are closed, stock solution in a supply source (100) flows to the purification unit (2) through a supply pipeline (5), and the circulation capacitor (4) of the purification unit (2) is in the operation stage, so ionized particles are attracted by corresponding electrodes with opposite polarities to the ionized particles, the ionized particles are gradually accumulated on the same electrodes, and the purification of the stock solution is carried out;
step two: as the purification proceeds, once the electrodes of the flow-through capacitor (4) reach program saturation, polarized particles are present in the fluid, which then enters a regeneration phase during which the first solenoid valve (6) and the third solenoid valve (11) are closed and the second solenoid valve (10) and the fourth solenoid valve (14) are opened, the first washing flow flows out of the storage tank (12) and into the supply conduit (5), forcing the purified stock solution contained in the purification unit (2) and in the extraction conduit (7) towards the service branch (8), then closing all the valves;
step three: the circulation capacitor (4) is again in the discharge phase by the control circuit, then the third solenoid valve (11) and the fourth solenoid valve (14) are opened and the first solenoid valve (6) and the second solenoid valve (10) are kept closed, the first washing flow leaves the storage tank (12), passes through the purification unit (2), removes the ionized particles accumulated on the electrodes and is conveyed back to the storage tank (12) for the first washing flow cycle;
step four: after a period of circulation of the first washing flow, with the second solenoid valve (10) and the fourth solenoid valve (14) closed and the first solenoid valve (6) and the third solenoid valve (11) open, the supply source (100) flows out of the raw liquor acting as a second washing flow, which flows through the supply duct (5) towards the purification unit (2) until it flows back into the storage tank (12) through the evacuation branch (9), which is able to replace in the purification unit (2) the first washing flow present in high concentrations of ionized particles and which is also able to remove the residual ionized particles still present on the electrodes of the flow-through capacitor (4);
step five: and finally, enabling the circulation capacitor (4) to be in a voltage-free stage for a period of time through the control circuit, then entering a charging stage again, waiting for the circulation capacitor (4) in the purification unit (2) to be loaded and enabling the circulation capacitor (4) to reach the expected working voltage, entering a working stage, then opening the first electromagnetic valve (6) and the second electromagnetic valve (10) and closing the third electromagnetic valve (11) and the fourth electromagnetic valve (14), and purifying the stock solution again.
2. A fluid purification system as claimed in claim 1, wherein: when the liquid in the storage tank (12) reaches a horizontal quota, or the interval time is set and is reached, the fifth valve (16) is opened to discharge the liquid containing high-concentration ionized particles in the storage tank (12) at a certain flow rate.
3. A fluid purification system, as claimed in claim 2, wherein: the second washing liquid flow rate to the storage tank (12) is equal to the flow rate of the concentrated fluid discharged from the storage tank (12) through the discharge pipe (15), which is set to be less than 5% of the total flow rate of the fluid treated and purified from the purification unit (2).
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