CN113401971B - Resin water filtering device and flushing method - Google Patents

Abstract

A resin water filtering device and a flushing method comprise a pretreatment mechanism, a reverse osmosis mechanism, a resin filtering mechanism and a post-treatment mechanism which are sequentially connected by pipelines; the pipeline is provided with a plurality of valves for controlling the on-off and/or flow of the pipeline; the resin filtering mechanism comprises a shell, a female resin filter element and a male resin filter element, wherein the female resin filter element and the male resin filter element are arranged in the shell; the female resin filter element is communicated with the male resin filter element, and the female resin filter element and the male resin filter element are communicated with a pipeline; the proportion of the positive resin to the negative resin in the resin filtering mechanism is adjusted to enable the water flowing out to be acidic or alkaline, and the scale in the pipeline and the valve is cleaned after the acidic and alkaline water enters the pipeline. The valve is washed and descaled by acidic or alkaline solution generated by the resin water filtering device without dismantling the valve. The complicated step of dismantling is avoided, and the problem that the sealing performance of the valve connecting end is reduced and the pipeline leakage is generated due to frequent dismantling of the valve is avoided.

Description

Resin water filtering device and flushing method

Technical Field

The invention belongs to the field of resin filtering devices, and particularly relates to a resin water filtering device and a flushing method.

Background

The resin water filtering device is also called a water softener, a water softener and a water quality softener. The method adopts the positive resin to soften the source water, the positive resin adsorbs calcium and magnesium ions (the main components forming scale) in the water to reduce the hardness of the source water, and the water can be purified by the heterogeneous resin (positive and negative resin) and can be regenerated for recycling.

A plurality of valves are arranged in the resin water filtering device for controlling the on-off of the pipeline and the flow velocity of water. In the long-term use process of the resin water filtering device, scale is easy to build up in the valve to reduce the flow and even block the valve, and the service life of the valve is shortened. The valve needs to be disassembled every time, and is reinstalled after being cleaned, so that the problems of reduced sealing performance and leakage of the connecting end of the valve are easily caused while the operation is complicated.

Disclosure of Invention

The invention aims to make water flow treated by a female resin filter element and/or a male resin filter element acidic, alkaline or neutral by adjusting the change of the resin performance proportion. And then the on-off of each valve is controlled, so that acidic or alkaline water flows through each valve in sequence to carry out displacement reaction with the scale accumulated in the valve, thereby cleaning the scale. The scale is cleaned by using acidic or alkaline water generated in the device, and a valve is not required to be disassembled.

The invention is realized by the following technical scheme:

A resin water filtering device comprises a pretreatment mechanism, a reverse osmosis mechanism, a resin filtering mechanism and a post-treatment mechanism which are sequentially connected by pipelines; the pipeline is provided with a plurality of valves for controlling the on-off and/or flow of the pipeline; the resin filtering mechanism comprises a shell, a female resin filter element and a male resin filter element, wherein the female resin filter element and the male resin filter element are arranged in the shell; the female resin filter element is communicated with the male resin filter element, and the female resin filter element and the male resin filter element are communicated with a pipeline; the proportion of the positive resin to the negative resin in the resin filtering mechanism is adjusted to enable the water flowing out to be acidic or alkaline, and the scale in the pipeline and the valve is cleaned after the acidic and alkaline water enters the pipeline.

Through the scheme, the invention at least has the following technical effects: tap water flows in from the pretreatment mechanism through controlling each valve, and flows through the reverse osmosis mechanism, the resin filtering mechanism and the post-treatment mechanism in sequence to obtain purified water. The effect of softening tap water and purifying water is achieved. When the scale in the valve is required to be washed, the proportion of the negative resin filter element and the positive resin filter element in the resin filter mechanism is regulated to enable water treated by the resin filter mechanism to be acidic or alkaline, then the acidic water or alkaline water flows through each valve through the control valve, so that the scale accumulated in the valve is reacted and dissolved, and the scale is removed by the acidic or alkaline solution produced by the resin filter device on the premise of not disassembling the valve. The complicated step of dismantling the valve is avoided, and the problem that the sealing performance of the valve connecting end is reduced and the pipeline leakage is generated due to frequent valve dismantling is avoided.

The housing of the resin filter mechanism is connected with positive and negative charges through wires, and is used for supplying an electric field environment required by resin reaction.

Preferably, the pretreatment mechanism comprises a tap water input end, a PP/scale inhibition active carbon filter assembly, a first electromagnetic valve, a pressure reducing valve and a diaphragm pump which are sequentially connected in series by pipelines; the diaphragm pump is connected with the reverse osmosis mechanism in series; the post-treatment mechanism comprises a UF/active carbon filter component, an ultraviolet disinfection component and a purified water output end which are sequentially connected in series by pipelines; the UF/activated carbon filter component is communicated with the pure water output end of the reverse osmosis mechanism through a pipeline, and/or the UF/activated carbon filter component is communicated with the resin filter mechanism through a pipeline.

The PP/scale inhibition active carbon filter component is a coarse filter structure which adopts PP cotton as a filter element and/or scale inhibition active carbon as a filter element and is used for carrying out preliminary filtration on tap water. The first electromagnetic valve is used for controlling the on-off of tap water. Pressure relief valves and diaphragm pumps are used to regulate flow and pressure. And the water flow subjected to preliminary filtration and pressure regulation by the pretreatment mechanism enters the reverse osmosis mechanism. The filtration is carried out again by a reverse osmosis mechanism.

The UF/active carbon filter component is a filter structure which adopts a hollow fiber ultrafiltration membrane as a filter element and/or active carbon as a filter element and is used for carrying out final filtration on the treated pure water. The ultraviolet disinfection component is a structure for irradiating, sterilizing and disinfecting pure water by ultraviolet light, and generally adopts an ultraviolet lamp.

The resin filtering device can soften tap water through three schemes:

The first scheme is as follows: tap water flows in from a tap water input end, sequentially flows through the PP/scale inhibition active carbon filter assembly, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump, the reverse osmosis mechanism, the UF/active carbon filter assembly and the ultraviolet disinfection assembly, and finally softened pure water is obtained from a purified water output end. The scheme does not adopt a resin filtering mechanism, has little pure water softened by the reverse osmosis mechanism, has low efficiency, is applicable to a small amount of water, and can reduce the loss of the positive resin filter core and the negative resin filter core.

The second scheme is as follows: tap water flows in from a tap water input end, sequentially flows through a PP/scale inhibition active carbon filter assembly, a first electromagnetic valve, a pressure reducing valve, a diaphragm pump, a reverse osmosis mechanism, a resin filter mechanism, a UF/active carbon filter assembly and an ultraviolet disinfection assembly, and finally softened pure water is obtained from a purified water output end. The scheme is added with a resin filtering mechanism to obtain pure water with high water quality.

The third scheme is as follows: tap water flows in from a tap water input end and sequentially flows through the PP/scale inhibition active carbon filter assembly, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump and the reverse osmosis mechanism; part of the purified water flows through the UF/active carbon filter component and the ultraviolet disinfection component in sequence from the purified water output end of the reverse osmosis mechanism, and finally softened purified water is obtained from the purified water output end. Part of the purified water flows through the resin filtering mechanism, the UF/active carbon filtering component and the ultraviolet disinfection component in sequence from the concentrated water output end of the reverse osmosis mechanism, and finally softened pure water is obtained from the purified water output end. The sum of the two pure water fractions is the pure water amount obtained in this scheme.

Preferably, the system also comprises three TDS water quality detectors; the first TDS water quality detector is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and is used for detecting the water quality of the tap water input end; the second TDS water quality detector is arranged on a pipeline between the resin filtering mechanism and the UF/active carbon filtering component and is used for detecting the water quality of the water flow which flows out after being treated by the resin filtering mechanism; the third TDS water quality detector is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and is used for detecting the water quality of the water flow at the output end of the purified water.

The first TDS water quality detector is used for detecting the water quality of the initial tap water. The second TDS water quality monitor is used for detecting whether the quality of the obtained pure water reaches the standard after softening through the reverse osmosis mechanism and the resin filtering mechanism. The third TDS water quality detector is used for detecting the quality of pure water when softening is finally finished. Meanwhile, by comparing the values of the three TDS water quality monitors, whether the proportion of the positive resin filter core to the negative resin filter core in the resin filter mechanism needs to be adjusted or whether the filter core needs to be replaced can be deduced.

Total dissolved solids (English: total dissolved solids, abbreviated TDS), also known as total dissolved solids, measured in milligrams per liter (mg/L). It indicates how much milligrams of soluble solids are dissolved in 1 liter of water. The higher the TDS value, the more dissolved substances contained in the water. Thereby judging the quality of the pure water.

Preferably, two flow sensors are also included; the first flow sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and is used for detecting the flow flowing into the diaphragm pump; the second flow sensor is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and is used for detecting the flow of the purified water output end.

The flow rate of the water flow flowing out of the pressure reducing valve is obtained through a first flow sensor and is used as a reference value for adjusting the power of the diaphragm pump. The pressure difference in the reverse osmosis mechanism is in the rated range, and the reverse osmosis mechanism can work normally to achieve the filtering effect. The RO membrane is prevented from being broken due to the excessive pressure of the fluid input into the reverse osmosis mechanism or is impermeable due to the insufficient osmotic pressure due to the insufficient pressure. The second flow sensor is used for obtaining the flow of pure water at the purified water output end, so that the working efficiency and the working load of the resin water filtering device can be counted conveniently. Convenient for periodic maintenance and filter core replacement.

Preferably, two temperature sensors are also included; the first temperature sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and is used for detecting the temperature of water flow flowing into the diaphragm pump; the second temperature sensor is arranged on the shell of the resin filtering mechanism and is used for detecting the temperature of the resin filtering mechanism.

The first temperature sensor is used for detecting the temperature of tap water flowing into the resin water filtering device, so that the phenomenon that the reverse osmosis mechanism cannot normally exert the osmosis effect due to the fact that the temperature of the tap water is too high or too low is avoided. The second temperature sensor is used for detecting the temperature of the numerical value filtering mechanism and preventing the filter element from being damaged due to overhigh temperature. Meanwhile, the numerical values of the first temperature sensor and the second temperature sensor are compared, and the reaction degree of the filter element and the concentrated water in the resin filtering mechanism can be deduced from the temperature difference of the first temperature sensor and the second temperature sensor, so that whether the filter element needs to be stopped or replaced is judged.

Preferably, the concentrated water output end of the reverse osmosis mechanism is communicated with a waste water discharge end through a reclaimed water pipeline; a fifth electromagnetic valve and a second electromagnetic valve are sequentially arranged on the regenerated water pipeline and are used for controlling the on-off of the pipeline; the regenerated water pipeline between the fifth electromagnetic valve and the second electromagnetic valve is communicated with the resin filtering mechanism through an acid water pipeline provided with a sixth electromagnetic valve; and a first three-way valve is further arranged on the regenerated water pipeline between the fifth electromagnetic valve and the second electromagnetic valve, an a port and a b port of the first three-way valve are connected into the regenerated water pipeline, and a c port of the first three-way valve is communicated with the female resin filter element or the male resin filter element through a pipeline.

When the reverse osmosis mechanism is washed independently, concentrated water stored in a chamber where the concentrated solution is located after the reverse osmosis mechanism is washed directly flows to a waste water discharge end through a reclaimed water pipeline to be discharged. The fifth electromagnetic valve is used for controlling the on-off between the concentrated water output end of the reverse osmosis mechanism and the regenerated water pipeline. The second solenoid valve is used for controlling the opening/closing of the waste water discharge end.

Since the reclaimed water pipe is used for discharging the concentrated water, scale is easily generated in itself and the fifth solenoid valve and the second solenoid valve mounted thereon. Thus, the acidic water or the alkaline water generated in the resin filtering mechanism is introduced into the regenerated water pipeline through the acidic water pipeline for descaling. Meanwhile, the on-off of the acidic water pipeline is controlled by a sixth electromagnetic valve.

After the reverse osmosis mechanism is washed, when the resin filtering mechanism is washed, water flowing through the negative resin filter core or the positive resin filter core in the resin filtering mechanism flows into the regeneration water pipeline through the c port of the first three-way valve. Finally discharged from the waste water discharge end.

Preferably, the concentrated water output end of the reverse osmosis mechanism is communicated with the female resin filter element or the male resin filter element through a pipeline; the UF/active carbon filter component is sequentially connected with a first one-way valve, a third electromagnetic valve and a negative resin filter element or a positive resin filter element of the resin filter mechanism in series through a pipeline; the direction of the first one-way valve is from the resin filtering mechanism to the UF/active carbon filtering component; the reverse osmosis mechanism is different from the resin filter element communicated with the UF/activated carbon filter assembly.

In the process of softening tap water, concentrated water flowing out from the concentrated water output end of the reverse osmosis mechanism firstly passes through the positive resin filter element or the negative resin filter element, then passes through the negative resin filter element or the positive resin filter element, then passes through the third electromagnetic valve and the first one-way valve, enters the UF/active carbon filter assembly and the ultraviolet disinfection assembly, and finally pure water is obtained. In the resin filtering mechanism, concentrated water is required to meet the filtering condition of both the positive resin filter element and the negative resin filter element and flows out through the third electromagnetic valve. Namely, the concentrated water flows in from the positive resin filter element firstly and flows out from the negative resin filter element; the concentrated water flows in from the negative resin filter core and flows out from the positive resin filter core.

Preferably, a second three-way valve is arranged on a pipeline between the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filter assembly, an a port and a b port of the second three-way valve are respectively communicated with the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filter assembly through pipelines, a c port is communicated with an ultrafiltration back flushing pipeline, and the other end of the ultrafiltration back flushing pipeline is communicated with a pipeline between the output end of the UF/active carbon filter assembly and the ultraviolet disinfection assembly.

And the second three-way valve is connected with the ultrafiltration backwashing pipeline, so that the connection relationship between the ultrafiltration backwashing pipeline and the UF/active carbon filter component in parallel is realized. The port b of the second three-way valve is communicated with the UF/active carbon filter component, and the port c of the second three-way valve is communicated with the ultrafiltration backwashing pipeline. And closing the port b, and when the port c is opened, water flowing out of the pure water output end of the reverse osmosis mechanism flows through the ultrafiltration backwashing pipeline, flows in from the output end of the UF/active carbon filter assembly, and flows out from the input end of the UF/active carbon filter assembly. The compacted activated carbon layer is loosened and impurities are washed away by backwashing, so that the contact area between granular activated carbon and water flow is increased. Or impurities attached to the hollow fiber ultrafiltration membrane can be washed away by backwashing, and the filtration effect of the hollow fiber ultrafiltration membrane is recovered.

Preferably, the pipeline between the UF/active carbon filter component and the second three-way valve is communicated with a reclaimed water pipeline through a parallel pipeline; a fourth electromagnetic valve and a second one-way valve are sequentially connected in series on the parallel pipeline; the fourth electromagnetic valve is used for controlling the on-off of the parallel pipeline; the second one-way valve is in a direction from the second three-way valve to the second electromagnetic valve.

The parallel pipeline is used for guiding the water flow of the backwashing UF/activated carbon filter assembly to enter the reclaimed water pipeline and finally be discharged by the waste water discharge end. The parallel pipeline is controlled to be on-off by a fourth electromagnetic valve, and the second one-way valve prevents water in the reclaimed water pipeline from flowing back. The parallel pipeline can also introduce the water flow which is still not up to standard after being treated by the reverse osmosis mechanism and/or the resin filtering mechanism into the reclaimed water pipeline for discharge, so that the UF/active carbon filtering component and the ultraviolet disinfection component are prevented from being damaged by the water with the water quality which is not up to standard, and even the purified water output end is polluted.

The invention also provides a flushing method, which comprises the following steps of: s1: flushing the reverse osmosis mechanism;

Opening the first electromagnetic valve, the second electromagnetic valve, the fifth electromagnetic valve and an a port and a b port of the second three-way valve; closing the third electromagnetic valve, the fourth electromagnetic valve and the sixth electromagnetic valve;

starting a diaphragm pump, and enabling tap water to flow through the PP/scale inhibition active carbon filter assembly, the first electromagnetic valve, the pressure reducing valve and the diaphragm pump in sequence from a tap water input end to flow into a reverse osmosis mechanism for flushing;

The water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: concentrated water filtered by the reverse osmosis mechanism flows through a regeneration water pipeline, a second electromagnetic valve and finally is discharged from a waste water discharge end from a concentrated water output end in sequence; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filter assembly, an ultraviolet disinfection assembly and finally is discharged from a purified water output end;

continuously flushing for 10-20 min;

S2: flushing the resin filtering mechanism;

After the step S1 is completed, opening a third electromagnetic valve; closing the second electromagnetic valve and the fifth electromagnetic valve;

starting a diaphragm pump, and enabling tap water to flow through the PP/scale inhibition active carbon filter assembly, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump and the reverse osmosis mechanism in sequence from a tap water input end;

The water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: concentrated water filtered by the reverse osmosis mechanism flows through a positive resin filter element in the resin filtering mechanism, a negative resin filter element in the resin filtering mechanism, a third electromagnetic valve, a first one-way valve, a UF/active carbon filtering component, an ultraviolet disinfection component and finally is discharged from a purified water output end; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filter assembly, an ultraviolet disinfection assembly and finally is discharged from a purified water output end;

And (5) continuously flushing for 2-8 min.

The flushing method can be used for independently flushing the reverse osmosis mechanism without polluting filter cores of other filtering structures. The waste water for flushing the reverse osmosis mechanism can enter the resin filtering mechanism from the concentrated water output end, and becomes pure water after being purified by the resin filtering mechanism, so that the waste water discharge can be reduced. Meanwhile, after the concentrated water output end of the reverse osmosis mechanism enters the positive resin filter core or the negative resin filter core in the resin filter mechanism, the concentrated water can be acidic or alkaline, and the concentrated water flows along with water to clean the pipeline, so that scale in the pipeline and the valve along the way is removed.

Drawings

Fig. 1 is a schematic structural diagram of a resin water filtering device according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a resin filtering mechanism according to an embodiment of the present invention.

Legend:

1a reverse osmosis mechanism; 2a resin filtering mechanism; 3, a pretreatment mechanism; 4, a post-treatment mechanism; 5, a valve; 6, a pipeline;

a 21 housing; 22 a female resin cartridge; a 23 cation resin filter element;

31 tap water input; 32 PP/scale inhibition active carbon filter component; a 33 diaphragm pump; 34 a pressure relief valve;

41 UF/activated carbon filter assembly; 42 ultraviolet sterilization assembly; 43 purified water output;

51 a first solenoid valve; 52 a second solenoid valve; 53 a third solenoid valve; 54 a fourth solenoid valve; 55 a fifth solenoid valve; 56 a sixth solenoid valve; 57 a first three-way valve; 58 a second three-way valve;

61 a regeneration water line; 62 an acidic water line; 63 ultrafiltration backwash tubing; 64 parallel pipes;

71 a first TDS water quality detector; a second TDS water quality detector 72; 73 a third TDS water quality detector;

81 a first flow sensor; 82 a second flow sensor;

91 a first temperature sensor; 92 a second temperature sensor;

591 a first one-way valve; 592 second check valve;

611 waste water discharge end.

Detailed Description

The invention is further described below with reference to the drawings and examples.

Please refer to fig. 1 and 2.

Example 1:

A resin water filtering device comprises a pretreatment mechanism 3, a reverse osmosis mechanism 1, a resin filtering mechanism 2 and a post-treatment mechanism 4 which are sequentially connected by a pipeline 6; the pipeline 6 is provided with a plurality of valves 5 for controlling the on-off and/or flow of the pipeline 6; the resin filter mechanism 2 comprises a shell 21, a female resin filter element 22 and a male resin filter element 23 which are arranged in the shell 21; the female resin filter element 22 is communicated with the male resin filter element 23, and the female resin filter element 22 and the male resin filter element 23 are communicated with the pipeline 6.

Through the scheme, the invention at least has the following technical effects: by controlling the valves 5, tap water is flowed in from the pretreatment mechanism 3, and purified water is obtained by sequentially flowing through the reverse osmosis mechanism 1, the resin filtration mechanism 2 and the post-treatment mechanism 4. The effect of softening tap water and purifying water is achieved. When it is necessary to flush the scale in the valve 5, the ratio of the female resin cartridge 22 to the male resin cartridge 23 in the resin filter mechanism 2 is adjusted so that the water treated by the resin filter mechanism 2 is acidic or alkaline, and then the acidic or alkaline water is caused to flow through each valve 5 by controlling the valve 5 so that the scale accumulated in the valve 5 is reacted and dissolved, thereby the valve 5 is flushed and scale-removed by the acidic or alkaline solution generated by the resin filter device itself without detaching the valve 5. The complicated step of disassembling the valve 5 is avoided, and the problem that the sealing performance of the connecting end of the valve 5 is reduced and the leakage of the pipeline 6 is generated due to frequent disassembly of the valve 5 is avoided.

The housing 21 of the resin filter mechanism 2 is connected to positive and negative charges through wires, and supplies an electric field environment necessary for resin reaction.

Based on the above embodiment, to further enhance the water quality and add a filtering process, in one embodiment, the pretreatment mechanism 3 includes a tap water input end 31, a PP/scale-inhibiting activated carbon filter assembly 32, a first electromagnetic valve 51, a pressure reducing valve 34 and a diaphragm pump 33, which are sequentially connected in series by a pipeline 6; the diaphragm pump 33 is connected in series with the reverse osmosis mechanism 1; the post-treatment mechanism 4 comprises a UF/active carbon filter assembly 41, an ultraviolet disinfection assembly 42 and a purified water output end 43 which are connected in series by a pipeline 6 in sequence; the UF/activated carbon filter assembly 41 communicates with the pure water output of the reverse osmosis mechanism 1 via conduit 6 and/or the UF/activated carbon filter assembly 41 communicates with the resin filter mechanism 2 via conduit 6.

The PP/scale-inhibiting activated carbon filter assembly 32 is a coarse filter structure using PP cotton as a filter element and/or scale-inhibiting activated carbon as a filter element, and is used for performing preliminary filtration on tap water. The first solenoid valve 51 is used to control the on-off of tap water. The pressure reducing valve 34 and the diaphragm pump 33 are used to regulate the flow rate and pressure. The water flow which is preliminarily filtered and regulated by the pretreatment mechanism 3 enters the reverse osmosis mechanism 1. The filtration is carried out again by the reverse osmosis mechanism 1.

The UF/activated carbon filter assembly 41 is a filter structure using a hollow fiber ultrafiltration membrane as a filter element and/or using activated carbon as a filter element for final filtration of the treated pure water. The ultraviolet sterilization unit 42 is configured to sterilize and disinfect pure water by irradiation with ultraviolet light, and generally employs an ultraviolet lamp.

The resin filtering device can soften tap water through three schemes:

The first scheme is as follows: tap water flows in from the tap water input end 31, sequentially flows through the PP/scale inhibition activated carbon filter assembly 32, the first electromagnetic valve 51, the pressure reducing valve 34, the diaphragm pump 33, the reverse osmosis mechanism 1, the UF/activated carbon filter assembly 41 and the ultraviolet disinfection assembly 42, and finally softened pure water is obtained from the purified water output end 43. The scheme does not adopt the resin filter mechanism 2, has little pure water softened by the reverse osmosis mechanism 1, has low efficiency, is applicable to a small amount of water, and can reduce the loss of the positive resin filter element 23 and the negative resin filter element 22.

The second scheme is as follows: tap water flows in from the tap water input end 31, sequentially flows through the PP/scale inhibition activated carbon filter assembly 32, the first electromagnetic valve 51, the pressure reducing valve 34, the diaphragm pump 33, the reverse osmosis mechanism 1, the resin filter mechanism 2, the UF/activated carbon filter assembly 41 and the ultraviolet disinfection assembly 42, and finally softened pure water is obtained from the purified water output end 43. The scheme is added into the resin filtering mechanism 2 to obtain pure water with high water quality.

The third scheme is as follows: tap water flows in from the tap water input end 31 and sequentially flows through the PP/scale inhibition activated carbon filter assembly 32, the first electromagnetic valve 51, the pressure reducing valve 34, the diaphragm pump 33 and the reverse osmosis mechanism 1; a part of the purified water passes through the UF/activated carbon filter assembly 41 and the ultraviolet ray sterilization assembly 42 in this order from the purified water output end of the reverse osmosis mechanism 1, and finally softened purified water is obtained from the purified water output end 43. A part of the concentrated water from the reverse osmosis unit 1 flows through the resin filter unit 2, the UF/activated carbon filter unit 41 and the ultraviolet ray sterilization unit 42 in this order, and finally softened pure water is obtained from the purified water output 43. The sum of the two pure water fractions is the pure water amount obtained in this scheme.

Based on the above examples, it should be noted that UF is an abbreviation for ultrafiltration, which is one of membrane separation technologies with pressure as the driving force. The purpose of separating large molecules from small molecules is that the pore diameter of the membrane is between 20 and 1000A degrees. The hollow fiber ultrafilter (membrane) has the advantages of high packing density in unit container, small occupied area, etc.

Based on the above embodiments, it should be noted that reverse osmosis is also called reverse osmosis, RO for short, a membrane separation operation for separating solvent from solution by using pressure difference as driving force. Because it is opposite to natural osmosis, it is called reverse osmosis. According to different osmotic pressures of various materials, reverse osmosis pressure which is higher than osmotic pressure, namely reverse osmosis method can be used to achieve the purposes of separation, extraction, purification and concentration. The method is characterized in that dilute solution (such as fresh water) and concentrated solution (such as seawater or brine) with the same volume are respectively placed on two sides of a container, the middle is blocked by a semipermeable membrane, a solvent in the dilute solution naturally passes through the semipermeable membrane and flows towards the concentrated solution side, the liquid level of the concentrated solution side is higher than the liquid level of the dilute solution by a certain height, a pressure difference is formed, and a permeation equilibrium state is reached, wherein the pressure difference is osmotic pressure, and the size of the osmotic pressure is determined by the type, concentration and temperature of the concentrated solution and is irrelevant to the property of the semipermeable membrane. If a pressure greater than the osmotic pressure is applied to the concentrated solution side, the solvent in the concentrated solution flows toward the dilute solution in a direction opposite to the original osmotic direction, a process called reverse osmosis. In this embodiment, the pure water output end corresponding to the reverse osmosis mechanism 1 is communicated with the chamber where the dilute solution is located, and the concentrated water output end is communicated with the chamber where the concentrated solution is located. The two chambers are separated by RO membranes.

Based on the above embodiment, it should be noted that the diaphragm pump 33 is actually a embolic pump, and the infusion subject is separated from the plunger and the pump cylinder by a membrane, thereby protecting the plunger and the pump cylinder. The left side of the diaphragm is made of a corrosion-resistant material or coated with a corrosion-resistant substance at the part contacted with the liquid; the right side of the diaphragm is filled with water or oil.

Based on the above embodiment, in order to detect the water quality value of each node, the method is convenient for calculating and judging the time for maintaining and replacing the filter element, and in one embodiment, the method further comprises three TDS water quality detectors; wherein a first TDS water quality detector 71 is installed on the pipe 6 between the pressure reducing valve 34 and the diaphragm pump 33 for detecting the water quality of the tap water input port 31; a second TDS water quality detector 72 is installed on the pipe 6 between the resin filter mechanism 2 and the UF/activated carbon filter assembly 41 for detecting the water quality of the effluent water flow treated by the resin filter mechanism 2; a third TDS water quality detector 73 is mounted on the pipe 6 between the UF/activated carbon filter assembly 41 and the ultraviolet disinfection assembly 42 for detecting the quality of the water flowing through the purified water output 43. The first TDS water quality detector 71 is used to detect the quality of the initial tap water. The second TDS water quality monitor is used to detect whether the quality of the obtained pure water reaches the standard after softening by the reverse osmosis mechanism 1 and the resin filtration mechanism 2. The third TDS water quality detector 73 is for detecting the quality of pure water at the time of final completion of softening. Meanwhile, by comparing the values of the three TDS water quality monitors, it can be deduced whether the ratio of the male resin filter element 23 to the female resin filter element 22 in the resin filter mechanism 2 needs to be adjusted or whether the filter element needs to be replaced.

Based on the above examples, it should be noted that total dissolved solids (English: total dissolved solids, abbreviated TDS), also known as total dissolved solids, are measured in milligrams per liter (mg/L). It indicates how much milligrams of soluble solids are dissolved in 1 liter of water. The higher the TDS value, the more dissolved substances contained in the water. Thereby judging the quality of the pure water.

Based on the above embodiment, to detect the flow value of each node, it is convenient to calculate and adjust the flow and pressure of the fluid, and in one embodiment, two flow sensors are further included; wherein a first flow sensor 81 is mounted on the conduit 6 between the pressure reducing valve 34 and the diaphragm pump 33 for detecting the flow into the diaphragm pump 33; a second flow sensor 82 is mounted on the conduit 6 between the UF/charcoal filter assembly 41 and the ultraviolet disinfection assembly 42 for detecting the flow of purified water at the output 43. The flow rate of the water flow flowing out from the pressure reducing valve 34 is acquired by the first flow sensor 81 as a reference value for adjusting the power level of the diaphragm pump 33. The pressure difference in the reverse osmosis mechanism 1 is in the rated range, and the filter effect can be achieved by normal operation. The RO membrane rupture caused by excessive pressure of the fluid input into the reverse osmosis mechanism 1 or the osmotic pressure insufficient and impermeable caused by insufficient pressure are avoided. The second flow sensor 82 is used to obtain the flow rate of pure water at the purified water output 43 so as to count the working efficiency and the working amount of the resin filter device. Convenient for periodic maintenance and filter core replacement.

Based on the above embodiment, to detect the temperature value of each node, it is convenient to calculate and control the opening and closing of each valve 5, and in one embodiment, two temperature sensors are further included; wherein a first temperature sensor 91 is mounted on the pipe 6 between the pressure reducing valve 34 and the diaphragm pump 33 for detecting the temperature of the water flow flowing into the diaphragm pump 33; the second temperature sensor 92 is mounted on the housing 21 of the resin filter mechanism 2 for detecting the temperature of the resin filter mechanism 2. The first temperature sensor 91 is used for detecting the temperature of tap water flowing into the resin water filtering device, so as to avoid the phenomenon that the reverse osmosis mechanism 1 cannot normally exert the osmosis effect due to the excessively high or excessively low temperature of the tap water. The second temperature sensor 92 is used for detecting the temperature of the numerical filter mechanism and preventing the filter element from being damaged due to the too high temperature. Meanwhile, the values of the first temperature sensor 91 and the second temperature sensor 92 are compared, and the reaction degree of the filter element and the concentrated water in the resin filtering mechanism 2 can be deduced from the temperature difference of the two, so that whether the filter element needs to be stopped or replaced is judged.

Based on the above embodiment, in order to facilitate the separate flushing of the reverse osmosis mechanism 1 and avoid the pollution to other filtering structures, in an embodiment, the concentrated water output end of the reverse osmosis mechanism 1 is communicated with the waste water discharge end 611 through the reclaimed water pipeline 61; the regenerated water pipeline 61 is sequentially provided with a fifth electromagnetic valve 55 and a second electromagnetic valve 52 for controlling the on-off of the pipeline 6; a reclaimed water pipe 61 between the fifth solenoid valve 55 and the second solenoid valve 52 communicates with the resin filtration mechanism 2 through an acid water pipe 62 to which the sixth solenoid valve 56 is attached; a first three-way valve 57 is also installed on the regenerated water pipeline 61 between the fifth electromagnetic valve 55 and the second electromagnetic valve 52, an a port and a b port of the first three-way valve 57 are connected into the regenerated water pipeline 61, and a c port is communicated with the female resin filter element 22 or the male resin filter element 23 through a pipeline 6.

When the reverse osmosis mechanism 1 is washed independently, the concentrated water accumulated in the chamber where the concentrated solution is located after washing the reverse osmosis mechanism 1 directly flows to the waste water discharge end 611 via the reclaimed water pipe 61 to be discharged. The fifth electromagnetic valve 55 is used for controlling the on-off between the concentrated water output end of the reverse osmosis mechanism 1 and the regenerated water pipeline 61. The second solenoid valve 52 is used to control the opening/closing of the waste water discharge port 611.

Since the reclaimed water pipe 61 is used to discharge the concentrated water, it itself and the fifth and second solenoid valves 55 and 52 mounted thereon are liable to generate scale. The acidic water or the alkaline water generated in the resin filtering mechanism 2 is introduced into the regenerated water pipe 61 through the acidic water pipe 62 for descaling. And meanwhile, the on-off of the acid water pipeline 62 is controlled by the sixth electromagnetic valve 56.

After the reverse osmosis mechanism 1 is washed, when the resin filter mechanism 2 is washed again, the water flow flowing through the female resin filter element 22 or the male resin filter element 23 in the resin filter mechanism 2 flows into the reclaimed water pipe 61 through the c-port of the first three-way valve 57. And finally discharged from the waste water discharge end 611.

Based on the above embodiment, in order to further enhance the softening effect of running water, in one embodiment, the concentrated water output end of the reverse osmosis mechanism 1 is communicated with the female resin filter element 22 or the male resin filter element 23 through a pipeline 6; the UF/active carbon filter assembly 41 is sequentially connected with the first check valve 591, the third electromagnetic valve 53 and the female resin filter element 22 or the male resin filter element 23 of the resin filter mechanism 2 in series through a pipeline 6; the first check valve 591 is directed to flow from the resin filter mechanism 2 to the UF/activated carbon filter assembly 41; the reverse osmosis mechanism 1 is different from the resin cartridge in which the UF/activated carbon filter assembly 41 communicates. In the process of softening tap water, the concentrated water flowing out from the concentrated water output end of the reverse osmosis mechanism 1 firstly passes through the positive resin filter element 23 or the negative resin filter element 22, then passes through the negative resin filter element 22 or the positive resin filter element 23, then passes through the third electromagnetic valve 53 and the first check valve 591, enters the UF/active carbon filter assembly 41 and the ultraviolet disinfection assembly 42, and finally pure water is obtained. In the resin filter mechanism 2, concentrated water is required to meet the filtering conditions of the male resin filter element 23 and the female resin filter element 22 and flows out through the third electromagnetic valve 53. That is, the concentrated water flows in from the male resin cartridge 23 first, and then flows out from the female resin cartridge 22; the concentrated water flows in from the female resin cartridge 22 and flows out from the male resin cartridge 23.

Based on the above embodiment, in order to achieve the backwashing effect on the UF/activated carbon filter assembly 41, in one embodiment, a second three-way valve 58 is installed on the pipeline 6 between the pure water output end of the reverse osmosis mechanism 1 and the input end of the UF/activated carbon filter assembly 41, the a port and the b port of the second three-way valve 58 are respectively communicated with the pure water output end of the reverse osmosis mechanism 1 and the input end of the UF/activated carbon filter assembly 41 through the pipeline 6, the c port is communicated with an ultrafiltration backwashing pipeline 63, and the other end of the ultrafiltration backwashing pipeline 63 is communicated with the pipeline 6 between the output end of the UF/activated carbon filter assembly 41 and the ultraviolet disinfection assembly 42. The ultrafiltration backwash pipe 63 is connected through the second three-way valve 58 to achieve a parallel connection of the ultrafiltration backwash pipe 63 and the UF/activated carbon filter assembly 41. The b port of the second three-way valve 58 communicates with the UF/activated carbon filter assembly 41 and the c port of the second three-way valve 58 communicates with the ultrafiltration backwash conduit 63. When the port b is closed and the port c is opened, water flowing out of the pure water output end of the reverse osmosis mechanism 1 flows through the ultrafiltration backwash pipeline 63, flows in from the output end of the UF/activated carbon filter assembly 41, and flows out from the input end of the UF/activated carbon filter assembly 41. The compacted activated carbon layer is loosened and impurities are washed away by backwashing, so that the contact area between granular activated carbon and water flow is increased. Or impurities attached to the hollow fiber ultrafiltration membrane can be washed away by backwashing, and the filtration effect of the hollow fiber ultrafiltration membrane is recovered.

Based on the above embodiment, to facilitate backwash wastewater of the UF/activated carbon filter assembly 41 to be discharged and non-standard water to be discharged without contaminating the purified water output 43, in one embodiment, the conduit 6 between the UF/activated carbon filter assembly 41 and the second three-way valve 58 is in communication with the regeneration water conduit 61 via a parallel conduit 64; the parallel pipeline 64 is sequentially connected with a fourth electromagnetic valve 54 and a second one-way valve 592 in series; the fourth electromagnetic valve 54 is used for controlling the on-off of the parallel pipeline 64; the second check valve 592 is oriented to flow from the second three-way valve 58 to the second solenoid valve 52. The parallel conduit 64 is used to direct the water flow of the backwash UF/activated carbon filter assembly 41 into the regenerant water conduit 61 for eventual discharge by the wastewater discharge end 611. The parallel pipe 64 is turned on and off by the fourth solenoid valve 54, and the second check valve 592 prevents the water of the regenerated water pipe 61 from flowing backward. The parallel pipeline 64 can also introduce the water flow which does not reach the standard after being treated by the reverse osmosis mechanism 1 and/or the resin filtering mechanism 2 into the reclaimed water pipeline 61 for discharge, so that the UF/activated carbon filtering component 41 and the ultraviolet disinfection component 42 are prevented from being damaged by the water with the water quality which does not reach the standard, and even the purified water output end 43 is prevented from being polluted.

Example 2:

On the basis of the embodiment 1, the invention also provides a flushing method, which comprises the following steps of:

s1: flushing the reverse osmosis mechanism 1;

opening the a port and the b port of the first solenoid valve 51, the second solenoid valve 52, the fifth solenoid valve 55 and the second three-way valve 58; closing the third solenoid valve 53, the fourth solenoid valve 54, the sixth solenoid valve 56;

Starting the diaphragm pump 33, and enabling tap water to flow through the PP/scale inhibition activated carbon filter assembly 32, the first electromagnetic valve 51, the pressure reducing valve 34 and the diaphragm pump 33 in sequence from the tap water input end 31 to flow into the reverse osmosis mechanism 1 for flushing;

The water flow filtered by the reverse osmosis mechanism 1 is discharged in two parts: concentrated water filtered by the reverse osmosis mechanism 1 flows through the reclaimed water pipeline 61, the second electromagnetic valve 52 and finally is discharged from the waste water discharge end 611 from the concentrated water output end in sequence; pure water filtered by the reverse osmosis mechanism 1 flows through the second three-way valve 58, the UF/active carbon filter assembly 41, the ultraviolet disinfection assembly 42 and finally is discharged from the purified water output end 43 from the pure water output end;

continuously flushing for 10-20 min; and judging the specific flushing time according to the length of the interval between two adjacent flushing steps and the quality of the discharged water. The duration of the flushing is typically 15 minutes in this example.

S2: flushing the resin filtering mechanism 2;

after the completion of the above step S1, the third electromagnetic valve 53 is opened; closing the second solenoid valve 52 and the fifth solenoid valve 55;

Starting the diaphragm pump 33, and enabling tap water to flow through the PP/scale inhibition activated carbon filter assembly 32, the first electromagnetic valve 51, the pressure reducing valve 34, the diaphragm pump 33 and the reverse osmosis mechanism 1 from the tap water input end 31 in sequence;

the water flow filtered by the reverse osmosis mechanism 1 is discharged in two parts: concentrated water filtered by the reverse osmosis mechanism 1 flows through the positive resin filter element 23 in the resin filter mechanism 2, the negative resin filter element 22 in the resin filter mechanism 2, the third electromagnetic valve 53, the first one-way valve 591, the UF/active carbon filter component 41, the ultraviolet disinfection component 42 and finally is discharged from the purified water output end 43 from the concentrated water output end in sequence; pure water filtered by the reverse osmosis mechanism 1 flows through the second three-way valve 58, the UF/active carbon filter assembly 41, the ultraviolet disinfection assembly 42 and finally is discharged from the purified water output end 43 from the pure water output end;

And (5) continuously flushing for 2-8 min. And judging the specific flushing time according to the length of the interval between two adjacent flushing steps and the quality of the discharged water. The duration of the flushing is typically 5 minutes in this example.

The flushing method can be used for flushing the reverse osmosis mechanism 1 independently without polluting the filter elements of other filtering structures. The waste water for flushing the reverse osmosis mechanism 1 can enter the resin filtering mechanism 2 from the concentrated water output end, and becomes pure water after being purified by the resin filtering mechanism 2, so that the waste water discharge can be reduced. Meanwhile, after the concentrated water output end of the reverse osmosis mechanism 1 enters the positive resin filter element 23 or the negative resin filter element 22 in the resin filter mechanism 2, the concentrated water can be acidic or alkaline, and flows along with water to clean the pipeline 6, so that scale in the pipeline 6 and the valve 5 along the way is removed.

The various technical features in the above embodiments may be arbitrarily combined as long as there is no conflict or contradiction between the combinations of features, but are not described one by one at a time in the description.

The present invention is not limited to the above-described embodiments, but it is intended that the present invention also includes modifications and variations if they fall within the scope of the claims and the equivalents thereof, if they do not depart from the spirit and scope of the present invention.

Claims (6)

1. The resin water filtering device is characterized by comprising a pretreatment mechanism, a reverse osmosis mechanism, a resin filtering mechanism and a post-treatment mechanism which are sequentially connected by pipelines; the pipeline is provided with a plurality of valves for controlling the on-off and/or flow of the pipeline; the resin filtering mechanism comprises a shell, a female resin filter element and a male resin filter element, wherein the female resin filter element and the male resin filter element are arranged in the shell; the female resin filter element is communicated with the male resin filter element, and the female resin filter element and the male resin filter element are communicated with a pipeline; the proportion of the positive resin to the negative resin in the resin filtering mechanism is adjusted to enable the water to be acidic or alkaline, and the scale in the pipeline and the valve is cleaned after the acidic or alkaline water enters the pipeline; the pretreatment mechanism comprises a tap water input end, a PP/scale inhibition active carbon filter assembly, a first electromagnetic valve, a pressure reducing valve and a diaphragm pump which are sequentially connected in series by pipelines; the diaphragm pump is connected with the reverse osmosis mechanism in series; the post-treatment mechanism comprises a UF/active carbon filter component, an ultraviolet disinfection component and a purified water output end which are sequentially connected in series by pipelines; the UF/active carbon filter component is communicated with the pure water output end of the reverse osmosis mechanism through a pipeline; the system also comprises three TDS water quality detectors; the first TDS water quality detector is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and is used for detecting the water quality of the tap water input end; the second TDS water quality detector is arranged on a pipeline between the resin filtering mechanism and the UF/active carbon filtering component and is used for detecting the water quality of the water flow which flows out after being treated by the resin filtering mechanism; the third TDS water quality detector is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and is used for detecting the water quality of the water flow at the output end of the purified water; the concentrated water output end of the reverse osmosis mechanism is communicated with a wastewater discharge end through a reclaimed water pipeline; a fifth electromagnetic valve and a second electromagnetic valve are sequentially arranged on the regenerated water pipeline and are used for controlling the on-off of the pipeline; the regenerated water pipeline between the fifth electromagnetic valve and the second electromagnetic valve is communicated with the resin filtering mechanism through an acid water pipeline provided with a sixth electromagnetic valve; a first three-way valve is also arranged on the regenerated water pipeline between the fifth electromagnetic valve and the second electromagnetic valve, an a port and a b port of the first three-way valve are connected into the regenerated water pipeline, and a c port of the first three-way valve is communicated with the female resin filter element or the male resin filter element through a pipeline; the concentrated water output end of the reverse osmosis mechanism is communicated with the negative resin filter element or the positive resin filter element through a pipeline; the input end of the UF/active carbon filter component is sequentially connected with a first one-way valve, a third electromagnetic valve and a negative resin filter element or a positive resin filter element of the resin filter mechanism in series through a pipeline; the direction of the first one-way valve is from the resin filtering mechanism to the UF/active carbon filtering component; the reverse osmosis mechanism is different from the resin filter element communicated with the UF/activated carbon filter assembly.

2. The resin water filter apparatus of claim 1, further comprising two flow sensors; the first flow sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and is used for detecting the flow flowing into the diaphragm pump; the second flow sensor is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and is used for detecting the flow of the purified water output end.

3. The resin water filter apparatus of claim 1, further comprising two temperature sensors; the first temperature sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and is used for detecting the temperature of water flow flowing into the diaphragm pump; the second temperature sensor is arranged on the shell of the resin filtering mechanism and is used for detecting the temperature of the resin filtering mechanism.

4. The resin water filtering device according to claim 1, wherein a second three-way valve is installed on a pipeline between the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filter assembly, an a port and a b port of the second three-way valve are respectively communicated with the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filter assembly through pipelines, a c port is communicated with an ultrafiltration back flushing pipeline, and the other end of the ultrafiltration back flushing pipeline is communicated with a pipeline between the output end of the UF/active carbon filter assembly and the ultraviolet disinfection assembly.

5. The resin water filtering device according to claim 4, wherein the pipeline between the UF/active carbon filtering component and the second three-way valve is communicated with the reclaimed water pipeline through a parallel pipeline; a fourth electromagnetic valve and a second one-way valve are sequentially connected in series on the parallel pipeline; the fourth electromagnetic valve is used for controlling the on-off of the parallel pipeline; the second one-way valve is in a direction from the second three-way valve to the second electromagnetic valve.

6. A flushing method applied to the resin water filtering device of claim 5, the method comprising the steps of:

S1: flushing the reverse osmosis mechanism;

Opening the first electromagnetic valve, the second electromagnetic valve, the fifth electromagnetic valve and an a port and a b port of the second three-way valve; closing the third electromagnetic valve, the fourth electromagnetic valve and the sixth electromagnetic valve;

starting a diaphragm pump, and enabling tap water to flow through the PP/scale inhibition active carbon filter assembly, the first electromagnetic valve, the pressure reducing valve and the diaphragm pump in sequence from a tap water input end to flow into a reverse osmosis mechanism for flushing;

The water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: concentrated water filtered by the reverse osmosis mechanism flows through a regeneration water pipeline, a second electromagnetic valve and finally is discharged from a waste water discharge end from a concentrated water output end in sequence; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filter assembly, an ultraviolet disinfection assembly and finally is discharged from a purified water output end;

continuously flushing for 10-20 min;

S2: flushing the resin filtering mechanism;

After the step S1 is completed, opening a third electromagnetic valve; closing the second electromagnetic valve and the fifth electromagnetic valve;

starting a diaphragm pump, and enabling tap water to flow through the PP/scale inhibition active carbon filter assembly, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump and the reverse osmosis mechanism in sequence from a tap water input end;

The water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: concentrated water filtered by the reverse osmosis mechanism flows through a positive resin filter element in the resin filtering mechanism, a negative resin filter element in the resin filtering mechanism, a third electromagnetic valve, a first one-way valve, a UF/active carbon filtering component, an ultraviolet disinfection component and finally is discharged from a purified water output end; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filter assembly, an ultraviolet disinfection assembly and finally is discharged from a purified water output end;

And (5) continuously flushing for 2-8 min.