CN108298713B - Wastewater purifier of washing machine - Google Patents

Wastewater purifier of washing machine Download PDF

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Publication number
CN108298713B
CN108298713B CN201810415662.3A CN201810415662A CN108298713B CN 108298713 B CN108298713 B CN 108298713B CN 201810415662 A CN201810415662 A CN 201810415662A CN 108298713 B CN108298713 B CN 108298713B
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water
cavity
wastewater
membrane
pipeline
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CN108298713A (en
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郭津硕
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/002Grey water, e.g. from clothes washers, showers or dishwashers
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/16Regeneration of sorbents, filters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Nanotechnology (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention relates to a wastewater purifier of a washing machine, which at least comprises a double-cavity water storage barrel, a membrane component, a water supply pump and a control system, and also relates to a process method for purifying wastewater by using the wastewater purifier, comprising the following steps of: discharging wastewater into a wastewater chamber; purifying the wastewater and storing the purified water in a purified water cavity; and (5) deeply purifying the purified water and supplying water. The wastewater purifier for the washing machine can meet the requirements of water treatment, storage and recycling of washing wastewater or washing wastewater of families, hotels and the like, can realize automatic operation of water preparation, cleaning, wastewater discharge and purified water supply, occupies less area, can realize the dense water surface of a purified water backwashing purification membrane, solves the pollution problem of the membrane filtration water purifier, and has the advantages of long service life of the membrane, high water utilization rate and the like.

Description

Wastewater purifier of washing machine
Technical Field
The invention relates to a washing wastewater or a washing wastewater water purifier generated by a washing machine, and belongs to the technical field of environmental protection equipment.
Background
Environmental pollution and lack of water resources, and the recycling of water becomes a necessary trend. Regarding washing wastewater or washing wastewater generated from a washing machine, it is about 30% of the amount of water used for home use, and a large amount of detergent is discharged. If the washing wastewater can be recycled, the water resource is saved greatly, and the sewage discharge is reduced. The data show that the Taihu lake washing wastewater accounts for 21.6 percent of domestic sewage, the nest lake and the Yunnan pond account for about 17.9 percent, and the discharge amount of domestic sewage in China is 510.3 hundred million tons in 2014, so that the annual discharge amount of the washing wastewater can reach more than 100 hundred million tons, and if 50 percent of the washing wastewater can be recycled, 50 hundred million tons of water resources can be obtained in annual manner, and the equivalent total sewage treatment amount is reduced, which is equivalent to 2500 Kunming lake water volumes.
However, in the recycling process of the washing wastewater, the problems of treatment, purification, storage and recycling are mainly solved. To achieve effective detergent, water and contaminant separation purification of laundry wastewater with a small footprint, and to provide clean water storage and transport. The membrane technology is a main alternative technology for treating the washing wastewater because of the advantages of energy conservation, high efficiency, small occupied area, easy maintenance and the like. However, the membrane filtration water purifier aims to solve the problems of membrane pollution and cleaning.
There are also a number of approaches in some patent literature concerning slowing down membrane fouling, such as by cross-flow operation, draining the concentrate from the membrane surface; causing turbulence of the membrane surface fluid by the bubbles; intermittent automatic back flushing; chemical cleaning; ultrasonic cleaning; adding a membrane scale inhibitor and the like. Wherein CN204644701U discloses a side water tank filtering type water-saving washing machine, membrane filtration is adopted, and a middle water tank is additionally arranged on the side surface of the washing machine to realize filtration; CN204644699U discloses a base type water-saving washing machine with first filtration, comprising a washing machine main body, a middle water tank and a filtering membrane group, wherein the middle water tank and the filtering membrane group are arranged below the washing machine main body, a washing wastewater outlet of the washing machine main body is connected with the filtering membrane group, a purifying port of the filtering membrane group is connected with the middle water tank, the water tank is communicated to a washing space of the washing machine through a water pipe so as to recycle filtered and purified water, and water circulation of the filtering membrane group and the water circulation of the middle water tank share the same water pump; CN107012912a discloses a device for recycling household washing water, but no membrane is adopted, the occupied area is large, and the use is inconvenient; CN106830400a discloses a water purifier with pure water membrane soaking function when the machine is stopped and stationary, but does not completely solve membrane pollution, and does not mention storage of wastewater.
Therefore, in the prior literature report and patent technology, the complexity of equipment is mostly increased in the implementation process, so that the manufacturing cost, occupied area or electricity consumption and the like exceed the practical range, and the operation is complex and the convenience degree is low.
Therefore, it is needed to design and develop a washing wastewater or washing wastewater purifier capable of being combined with a washing machine, so that the purification, storage, transportation and recycling of the washing wastewater are automatically realized through the control of an automatic control program in the washing process, and the technical requirements of small occupied area, high treatment speed, simple structure, easy maintenance, long service life of a filtering element and the like are met.
Disclosure of Invention
In order to overcome the defects in the prior art and fundamentally solve the key problem of recycling the washing wastewater, the invention provides the membrane filtration water purifier which is resistant to membrane pollution, keeps membrane flux, prolongs the service life and improves the water utilization rate. The invention reduces the occupied area by adopting the measure of placing the flexible water purifying bag in the wastewater barrel; the method for realizing the dense water surface of the film for reversely cleaning the purified water by switching the electromagnetic valve solves the pollution problem of the film filtering water purifier; and automation of the processes of membrane cleaning, water production, water supply and the like is realized by arranging simpler elements.
The washing machine wastewater purifier provided by the invention can realize in-situ recycling of washing or washing wastewater, has the advantages of small volume, small occupied area, long service life of the membrane, convenience in operation, use and maintenance, high water utilization rate and the like, has a wide application range, and can meet the requirements of treatment, storage, transportation and recycling of washing or washing wastewater of families, buildings, ships, construction sites, resorts, factories and the like.
According to one aspect of the present invention, there is provided a washing machine wastewater purifier, comprising at least: a multi-cavity water storage barrel and a membrane component.
In the invention, the water storage bucket is provided with a plurality of chambers or cavities, wherein the chambers or cavities comprise at least one water purifying cavity and a waste water cavity, the waste water cavity is a storage space for waste water and partial membrane produced concentrated water, preferably, an opening filter bag is arranged at the inlet of the waste water cavity, preferably, the filter bag is a filter mesh bag woven by nylon, metal, PET and other materials, and the filter pore diameter of the filter bag can be 30-800 um.
The water storage bucket is a double-cavity water storage bucket, a soft and scalable sealed bag is arranged in the water storage bucket, a water purifying cavity is arranged in the inner cavity of the sealed bag, a waste water cavity is arranged in a cavity between the outer part of the sealed bag and the inner part of the water storage container, preferably, the sealed bag is double-layer, the outer layer is PE, PP, PET or a woven bag made of nylon, and the inner layer is a polymer film sealing bag made of PE, PP, EVA, silicon rubber or natural rubber.
In the invention, the membrane component is a two-stage membrane component, namely, a first-stage purified water and a second-stage purified water are respectively prepared, namely, a deep purified water supply, preferably, the membrane surface of the first-stage membrane component is automatically subjected to active self-cleaning while the second-stage purified water is carried out by utilizing the second-stage purified water membrane component, the first-stage membrane component is preferably a combination of microfiltration and nanofiltration, microfiltration and ultrafiltration, microfiltration and reverse osmosis, ultrafiltration and nanofiltration, or is an ultrafiltration membrane, and the two groups of membrane components are preferably ultrafiltration, nanofiltration, a combination of ultrafiltration and nanofiltration, or is a reverse osmosis membrane.
The water purifier further comprises a control system and a water supply pump, the control system comprises a sensor and an actuator, the sensor is preferably a pressure switch used in the water purifying cavity and the waste water cavity, more preferably, the pressure switch of the water purifying cavity is a high-pressure switch, the pressure switch of the waste water cavity is a low-pressure switch, the actuator is an electromagnetic valve, preferably a three-way electromagnetic valve, for example, the actuator can be divided into a three-way valve of waste water, concentrated water and produced water, more preferably, the three-way valve of the concentrated water is a confluence valve, and the three-way valve of the water purifying cavity is a diverter valve.
In another aspect of the present invention, there is provided a method for purifying waste water, preferably washing waste water or washing waste water generated by a washing machine, by purifying the waste water by using the above water purifier, and recycling the purified waste water, thereby realizing recycling of the waste water, comprising the steps of:
Step 1, discharging wastewater into a wastewater cavity;
step 2, purifying the wastewater, and storing the purified water in a purified water cavity;
And 3, deeply purifying the purified water and supplying water.
In the step 1, the waste water can be washing waste water or washing waste water, and can also be concentrated water generated by a secondary membrane component.
The purification in the step 2 is primary purification, and the process flow is as follows: the wastewater is filtered in a wastewater barrel Ra through a water inlet filter bag Ma and an intermediate filter baffle Mb, and then enters a primary membrane component Mc through a pipeline 1, a valve Va, a pipeline 2, a water supply pump P and a pipeline 4, and is subjected to primary purification; the obtained purified water is introduced into a water purifying bag Rb as a water purifying cavity through a pipeline 5, a valve Vc and a pipeline 6, and is stored for a short time for re-purification and use.
The deep purification in the step 3 is secondary purification, and the process flow is as follows: the purified water obtained in step 2 flows from the water purifying bag Rb through the line 6, the valve Vc, the line 3, the water supply pump P and the line 4, enters the primary membrane module Mc, the obtained concentrate flows through the line 7, the valve Vb and the line 9, enters the secondary membrane module Md, where secondary purification is performed, and the obtained secondary purified water is led to, for example, a washing machine through the line 10.
In the invention, the control system is used for realizing water production, membrane cleaning, waste water discharge and water supply, particularly through a waste water cavity pressure switch, a water purifying cavity pressure switch and the like, wherein the water production comprises primary water production and secondary water production, the membrane cleaning comprises primary cleaning and secondary cleaning, and the control modes comprise water production, waiting, water supply, cleaning and pollution discharge modes.
The washing machine wastewater purifier and the method for purifying wastewater by using the same provided by the invention can obtain the following technical effects:
(1) Because the flexible sealing bag is adopted as the water purifying cavity and the flexible filtering net bag is adopted as the waste water cavity, the occupied space for storing water is greatly reduced, and the pollutant is conveniently removed.
(2) In the using process, the pump pressurizes and conveys the purified water, so that the supply efficiency of the purified water is ensured.
(3) The surface of the membrane is cleaned and regenerated while the purified water is conveyed, so that the timely removal of pollutants is ensured, the utilization rate of the water is improved, the water production flux of the membrane is maintained, and the service life of the membrane can be prolonged.
(4) Compared with the prior art, the invention avoids the defects of large occupied area of water purifying equipment, inconvenient storage of wastewater purified water, over-fast membrane pollution, low service life, low water utilization rate and the like, ensures that the water purifying process is simpler and easier to implement, realizes in-situ regeneration and reuse of washing wastewater or washing wastewater generated by families, buildings, hotels, communities, islands, ships, field barracks and the like, provides technical equipment guarantee for recycling water of a distributed water terminal, greatly saves resources by large-scale popularization, reduces pollution and becomes a sharp tool for human beings to cope with water resources and environmental problems.
Drawings
In order to more clearly illustrate the technical solutions and/or embodiments of the present invention, the drawings that are used in the description will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic process flow diagram of a wastewater purifier for a washing machine according to the present invention;
Fig. 2 is a structural assembly diagram of a wastewater purifier for washing machine according to embodiment 1 of the present invention;
FIG. 3 is a perspective view of a main body of the wastewater purifier of the washing machine according to the present invention;
Wherein 3-1 is a front view; 3-2 is a rear view; 3-3 is a side view; 3-4 are top views; 3-5 is a front view of A-A; 3-6 is a B-B side view;
FIG. 4 is a three views of a double-chamber waste water bucket of the waste water purifier of the washing machine of the present invention;
Wherein 4-1 is a B-B front view; 4-2 is a side view of A-A; 4-3 is a top view;
fig. 5 is a schematic structural view of a wastewater purifier for a washing machine according to the present invention.
Detailed Description
The invention is further described in detail below by means of the figures and examples. The features and advantages of the present invention will become more apparent from the description. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
The word "exemplary" is used herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
According to a first aspect of the present invention, there is provided a washing machine wastewater purifier, mainly comprising: a multi-cavity water storage barrel and a membrane component.
The existing water purifier mainly purifies raw water such as drinking water, reclaimed water, industrial water or water from other sources or used wastewater so as to reach the drinking standard or meet the requirement of higher purification degree in specific applications, therefore, a water storage bucket is usually arranged for storing purified water, and if the wastewater is purified, a wastewater storage area or a storage pool is usually arranged, so that on one hand, the purified water of the wastewater is inconvenient to store and the whole water purifying equipment occupies a large area; on the other hand, the purification process is usually started when the purified water is needed to be prepared or used, so that the treatment speed is low, and the instant requirement for a large amount of purified water is difficult to meet; in addition, the surface of the membrane is easy to accumulate pollutants, if the membrane cannot be cleaned in time, the water production flux of the membrane is reduced, the utilization rate of water is reduced, the load and the use strength of the membrane are increased, and the service life is greatly reduced.
Especially for washing waste water, such as washing waste water generated when washing textiles such as clothes, bedding and the like by washing equipment used in daily household washing machines or in places such as buildings, hotels, communities, islands, ships, field barracks and the like, the washing waste water is usually discharged without treatment due to lack of proper waste water storage facilities, so that a large amount of water resources are wasted, and the environment pollution is caused, so that the treatment difficulty is increased.
In view of the above-mentioned state of the art, the present inventors have conducted intensive studies through careful analysis, and have surprisingly found that the above problems can be solved by providing a multi-cavity water storage tank in combination with purification of water by a membrane module.
The water storage bucket adopted by the invention has a plurality of chambers or cavities, wherein the water storage bucket comprises at least one water purifying cavity and one waste water cavity, namely, one or more water purifying cavities can be included according to the water purifying amount which is treated as required.
The waste water cavity is a storage space for waste water and partial membrane produced concentrated water. Preferably, an open filter bag is provided at the inlet of the waste water chamber. The filter bag is preferably a flexible filter mesh bag woven from nylon, metal, PET and the like, and the filter pore diameter of the filter bag can be 10-1000 um, preferably 30-800 um, more preferably 50-500 um.
According to the invention, at least two chambers are arranged in the same water storage barrel, so that the wastewater cavity and the purified water cavity are arranged at the shortest distance, on one hand, the occupied space for storing water can be greatly reduced, and on the other hand, the distance for connecting and conveying the wastewater to a purification area is greatly shortened, and further, the time is saved.
According to a preferred embodiment of the invention, the water storage bucket is a double-cavity water storage bucket, a soft and scalable sealing bag with bursting strength is arranged in the water storage bucket, the inner cavity of the sealing bag is a water purifying cavity, and the cavity between the outer part of the sealing bag and the inner part of the water storage container is a waste water cavity.
The airtight bag used in the invention is formed by double layers, the outer layer of the airtight bag is a woven bag which has certain strength and flexibility and can be enlarged and reduced, and the material of the outer woven bag is preferably PE, PP, PET, nylon and other polymers; the inner layer is a flexible and expandable and contractible organic polymer film sealing bag, and the material of the inner layer sealing bag is preferably PE, PP, EVA, silicon rubber, natural rubber and other high-elasticity and strong polymers.
As shown in fig. 1, the waste water bucket Ra is an open container, wherein the waste water bucket Ra is divided into two parts by a rigid grid, one part is provided with a water purifying cavity Rb, the other part is a waste water cavity, a water inlet filter bag Ma is placed on the waste water cavity or the waste water bucket Ra, the opening of the filter bag Ma is upward, waste water can be poured from the opening of the filter bag, the filter bag can hold up pollutants larger than the interception aperture of the filter bag, and water after primary filtration enters the waste water bucket Ra. The water purifying bag or the water producing barrel is a flexible plastic closed bag and is placed in the water purifying cavity Rb, and when the water purifying bag or the water purifying cavity Rb is not filled with purified water, the volume of the flexible bag Rb can be changed to provide a containing space for the wastewater.
The membrane component adopted by the invention is a water purifying component for filtering by utilizing a membrane separation principle, and the membrane component can be one or a combination of more of microfiltration, ultrafiltration, nanofiltration and reverse osmosis membrane components.
According to a preferred embodiment of the invention, a two-stage membrane module is provided, wherein: the washing water or the washing wastewater discharged to the wastewater cavity is prepared into primary purified water through a primary membrane assembly, the primary purified water is stored in the purified water cavity, and the wastewater is preferably automatically prepared into primary purified water through the primary membrane assembly; when using the water purification, the rethread second grade membrane module carries out the degree of depth purification and supplies water to when the degree of depth purification supplies water, can also carry out self-cleaning to the first grade membrane module filtration surface and purify.
The primary membrane component adopted by the invention is preferably a combination of microfiltration and nanofiltration, microfiltration and ultrafiltration, microfiltration and reverse osmosis, ultrafiltration and nanofiltration or an ultrafiltration membrane;
The secondary membrane component adopted by the invention is preferably ultrafiltration, nanofiltration, a combination of ultrafiltration and nanofiltration or a reverse osmosis membrane.
The water purifier provided by the invention further comprises a control system and a water supply pump.
Through this control system for the washing or the washing waste water that discharges the waste water chamber prepares the one-level water purification through one-level membrane module, and deposits in the water purification intracavity, and when using the water purification, the rethread second grade membrane module carries out the deep purification water supply, realizes simultaneously the self-cleaning purification to one-level membrane module filtering surface.
The control system includes sensors and actuators employed to implement the decontamination process, wherein:
The sensor is preferably a pressure switch used in the water purifying cavity and the waste water cavity, more preferably, the pressure switch of the water purifying cavity is a high-voltage switch, and the on pressure value of the high-voltage switch is: 0.05-0.10 MPa, breaking pressure value: less than or equal to 0.01 to 0.15MPa; the waste water cavity pressure switch is a low-voltage switch, and the on pressure value of the waste water cavity pressure switch is as follows: a break pressure value of 0.01 to 0.025 MPa: not less than 0.01MPa.
The actuator is mainly an electromagnetic valve, preferably a three-way electromagnetic valve or an electromagnetic three-way valve, and can be divided into a three-way valve for wastewater, concentrated water and produced water. More preferably, the three-way valve for concentrated water is a confluence valve, and the three-way valve for purified water is a diverter valve.
The control system also includes control panels and logic circuitry necessary to cause the sensors and actuators to function properly and perform their functions.
In summary, the wastewater purifier of the washing machine controls the opening of the pump and the electromagnetic valve through the control system, particularly through the pressure switch of the wastewater cavity, the pressure switch of the water purifying cavity and the instruction switch state of the panel, thereby realizing the automatic operation of water preparation, cleaning, wastewater discharge and water supply.
The composition and operation of the wastewater purifier for washing machine according to the present invention will be described with reference to fig. 1.
In fig. 1, ra and Rb are respectively a waste water bucket and a water purifying bag; ma, mb, mc, md are respectively a water inlet filter bag, a middle filter baffle plate, a primary membrane component and a secondary membrane component; p is a water supply pump; va, vb and Vc are respectively a water inlet three-way electromagnetic valve, a concentrated water three-way electromagnetic valve and a water producing three-way electromagnetic valve; pa and Pb are respectively a water purifying bag pressure switch and a waste water cavity pressure switch.
As shown in fig. 1, wastewater enters a wastewater barrel Ra through a wastewater inlet pipe 12, is filtered through a water inlet filter bag Ma and an intermediate filter partition plate Mb respectively, and after a wastewater cavity pressure switch Pb and a water supply pump P are opened, the filtered wastewater flows through a water inlet three-way electromagnetic valve Va through a wastewater barrel water outlet pipe 1, then enters a primary membrane assembly Mc through a main inlet pump pipe 2 and a primary membrane assembly water inlet pipe 4, is subjected to primary purification, and the obtained primary purified water flows through a water production three-way electromagnetic valve Vc through a primary membrane assembly water production pipe 5, then enters a purified water bag Rb under the control of a purified water bag pressure switch Pa, and is stored for re-purification and use.
When the water purification is needed, under the control of the pressure switch Pa of the water purification bag, the primary purified water obtained above flows through the pipeline 6 and the valve Vc from the water purification bag Rb, then flows into the primary membrane module Mc through the purified water inlet pipe 3 and the water supply pump P, and flows into the primary membrane module Mc through the pipeline 4 again, on one hand, the secondary purification is realized, on the other hand, the membrane surface is automatically cleaned, the blockage is avoided, the obtained concentrated water flows through the concentrated water three-way electromagnetic valve Vb through the primary membrane module concentrated water outlet pipe 7, most of the obtained concentrated water flows into the secondary membrane module Md through the secondary membrane module water inlet pipe 9, a small amount of sewage is discharged or collected through the sewage discharge pipe 8, and optionally returns to the wastewater barrel Ra again, the secondary purified water flows into an application place, such as a washing machine, through the secondary membrane module purified water discharge pipe 10, and the concentrated water obtained through the secondary membrane module Md flows into the wastewater barrel 11 to be used as washing wastewater to return to the wastewater barrel Ra.
Therefore, according to another aspect of the present invention, there is also provided a wastewater purification method, wherein the wastewater is preferably washing wastewater or washing wastewater generated by a washing machine, the wastewater is purified by the water purifier and recycled after purification, thereby realizing wastewater reclamation, and the method comprises the following steps:
Step 1, discharging the wastewater into a wastewater chamber, preferably automatically discharging the wastewater into the wastewater chamber.
Step 2, purifying the wastewater, and storing the purified water in a purified water cavity;
And 3, deeply purifying the purified water and supplying water.
In step 1 of the present invention, the wastewater may be washing or washing wastewater generated for the first time during washing in a daily household washing machine or a washing device for a medium-sized or large-sized community, or may be sewage water via line 8 and/or concentrated water generated by a secondary membrane module Md via line 11.
The purification in the step 2 of the invention is primary purification, and the process flow is as follows: the wastewater is filtered in a wastewater barrel Ra through a water inlet filter bag Ma and an intermediate filter baffle Mb, and then enters a primary membrane component Mc through a pipeline 1, a valve Va, a pipeline 2, a water supply pump P and a pipeline 4, and is subjected to primary purification; the obtained purified water is introduced into a water purifying bag Rb as a water purifying cavity through a pipeline 5, a valve Vc and a pipeline 6, and is stored for a short time for re-purification and use.
The deep purification in the step 3 of the invention is the secondary purification, and the process flow is as follows: the purified water obtained in step 2 flows from the water purifying bag Rb through the line 6, the valve Vc, the line 3, the water supply pump P and the line 4, enters the primary membrane module Mc, the obtained concentrate flows through the line 7, the valve Vb and the line 9, enters the secondary membrane module Md, where secondary purification is performed, and the obtained secondary purified water is led to, for example, a washing machine through the line 10.
According to the invention, both the primary purification of step 2 and the secondary purification of step 3 are carried out by means of said membrane modules (i.e. primary and secondary membrane modules), which may be one or a combination of several of microfiltration, ultrafiltration, nanofiltration and reverse osmosis modules.
The assembly and process implementation process of the wastewater purifier for the washing machine provided by the invention are specifically described below.
Firstly, all parts or components are connected together according to the connection sequence shown in fig. 1, wherein the water outlet of a water purifying bag Rb is connected to the inlet of a water purifying three-way valve Vc through a pipeline 6, the outlet of Vc is connected with the inlet of a waste water three-way valve Va through a pipeline 5, the inlet of Va is connected with a waste water cavity Ra through a pipeline 1, the outlet of Va is connected with the inlet of a water supply pump P through a pipeline 2, the outlet of P is connected with the water inlet of the primary membrane assembly Mc through a pipeline 4, the concentrated water outlet of Mc is connected with the inlet of a concentrated water three-way valve Vb through a pipeline 7, the outlet of Vb is connected with the water inlet of a secondary membrane assembly Md through a pipeline 9, the concentrated water outlet of Md is connected with the waste water inlet of the waste water cavity Ra through a pipeline 11, and the purified water outlet of Md is connected with water places such as a washing machine through a pipeline 10; the outlet of the three-way valve Vb of the concentrated water is externally connected with a wastewater or sewage discharge port through a pipeline 8.
According to the invention, the control system of the water purifier can control the water purifying process flow, specifically, the starting of the pump is realized through the pressure switch Pb of the waste water cavity, the pressure switch Pa of the pure water cavity and the water supply requirement of the panel, and the water preparation, the membrane cleaning, the waste water discharge and the water supply are automatically realized.
According to a preferred embodiment of the present invention, the water production includes primary water production and secondary water production, and the membrane cleaning may include primary cleaning and secondary cleaning.
Therefore, the control system adopted by the invention can realize the functions of the control part by setting the control interface, for example, the control interface can indicate various modes, for example, a switch interface for setting the control modes of waste water discharge, water discharge (namely water supply), primary cleaning, secondary cleaning, primary water production, secondary water production, pure water full, waste water empty and the like, as shown in the front view of fig. 3. FIG. 3 also shows a rear view, a side view and a top view of the main body part of the water purifier of the present invention, a front view of the first stage A-A and a side view of the B-B.
In FIG. 3, mb is an intermediate filter separator (a rigid 200 mesh stainless steel mesh), mc is a primary membrane module (UF), md is a secondary membrane module (RO), me is a water-producing activated carbon filter element TOC, and Mf is a 10um fine filter element; p is a water supply pump (self-priming pump); va, vb and Vc are respectively a water inlet three-way electromagnetic valve, a concentrated water three-way electromagnetic valve and a water producing three-way electromagnetic valve; pa and Pb are respectively a water purifying bag pressure switch and a waste water cavity pressure switch.
The water purifier provided by the invention can realize different control modes, including a water making mode, a waiting mode, a water supplying mode, a cleaning mode and a pollution discharging mode, wherein each mode has different starting conditions, execution programs and specific processes, and the following specific description is given below:
a water making mode):
Starting conditions: the pressure switch Pa of the water purifying cavity is conducted; and the waste water cavity pressure switch Pb is conducted; and a water supply and purification mode switch on the control interface is in a closed state;
executing the program: the water purifying inlet connected with the pipeline 3 of the wastewater electromagnetic valve Va is closed; the concentrated water valve Vb is closed with a purified water outlet connected with the spool 9; and the purified water electromagnetic valve Vc is closed with a purified water outlet connected with the pipeline 3.
The specific process comprises the following steps: the wastewater enters the water supply pump P from the pipeline 1 and the pipeline 2, is conveyed to the inlet of the primary membrane component Mc through the pipeline 4, flows through the membrane surface of the Mc, flows out from the concentrated water outlet of the Mc, passes through the pipeline 7 and the concentrated water valve Vb, and is discharged to the sewage discharge port through the pipeline 8. And the produced water (i.e. purified water) of the first-stage membrane module Mc permeates the membrane layer, and comes out of the purified water outlet of Mc, and after passing through the pipeline 5 and the purified water solenoid valve Vc, the purified water flows through the pipeline 6 and enters the purified water barrel Rb. And stopping the pump until the starting condition of the water making mode is changed, and entering a waiting mode.
Second), waiting mode:
starting conditions: when the pressure switch Pa of the water purifying cavity is opened; or the waste water cavity pressure switch Pb is disconnected;
executing the program: the outlet of the wastewater electromagnetic valve Va connected with the pipeline 2 is closed; the inlet of the concentrated water valve Vb coupled to the line 7 is closed; and the purified water electromagnetic valve Vc is connected with a purified water outlet of the pipeline 6 to be closed; and the water supply pump P is turned off.
The specific process comprises the following steps: the waiting mode is on and the pump is not started until the starting condition of the waiting mode is changed.
Third), water supply mode:
starting conditions: when the pressure switch Pa of the water purifying cavity is conducted; and a water supply and purification mode switch on the control interface is in a starting state;
Executing the program: the wastewater inlet of the wastewater electromagnetic valve Va connected with the pipeline 1 is closed; the membrane water inlet of the water purifying electromagnetic valve Vc connected with the pipeline 5 is closed; and the concentrated water outlet connected with the pipeline 8 is closed by the concentrated water valve Vb; and the water supply pump P is turned on.
The specific process comprises the following steps: the pure water enters the pump P from the pipeline 6 and the pipeline 3, is conveyed to the inlet Mc4 of the primary membrane assembly through the pipeline 4, flows through the membrane surface of the primary membrane assembly Mc, washes off pollutants on the surface, comes out from the concentrated water port Mc7 of the primary membrane assembly, passes through the pipeline 8, reaches the inlet Md9 of the secondary membrane assembly, flows out from the pure water port Md10 of the secondary membrane assembly to the pure water discharge port, realizes external water supply, and discharges the secondary concentrated water to the wastewater barrel Ra through the concentrated water port Md11 of the secondary membrane assembly. And stopping the pump until the starting condition of the external water discharge mode is changed. A waiting mode is entered.
Fourth, cleaning mode
According to a preferred embodiment of the present invention, the cleaning mode includes two types of a primary cleaning mode and a secondary cleaning mode.
4.1 Primary component cleaning mode
Starting conditions: when the first-level cleaning command switch of the control interface is opened; and satisfies the set cleaning time; and the pressure switch Pa of the water purifying cavity is conducted; and a water supply mode switch on the control interface is in an off state.
Executing the program: the water inlet of the water purifying electromagnetic valve Vc connected with the pipeline 5 is closed; the wastewater inlet connected with the pipeline 1 is closed by the wastewater electromagnetic valve Va; the concentrated water inlet membrane water outlet connected with the pipeline 9 is closed by the concentrated water valve Vb; the water supply pump P is started.
The execution process comprises the following steps: the purified water enters the pump P from the pipeline 6 and the pipeline 3, is conveyed to the inlet of the primary membrane component Mc through the pipeline 4, flows through the surface of the primary membrane component Mc, washes the pollutants on the surface of the membrane, and then flows out from the concentrated water gap connected with the primary membrane component Mc and the pipeline 7 to be discharged out of the wastewater discharge port. And stopping the pump until the first-stage cleaning mode condition is changed. A waiting mode is entered.
4.2 Two-level component cleaning mode
Starting conditions: when a two-level cleaning command switch of the control interface is turned on; and satisfies the set cleaning time; and the pressure switch Pa of the water purifying cavity is conducted; and an external water purification mode switch on the control interface is in a closed state.
Executing the program: the water inlet of the water purifying electromagnetic valve Vc connected with the pipeline 5 is closed; the wastewater inlet of the wastewater electromagnetic valve Va connected with the pipeline 1 is closed; the concentrated water outlet connected with the pipeline 8 is closed by the concentrated water valve Vb; the water supply pump P is started.
The execution process comprises the following steps: the purified water enters the pump P from the water inlet and outlet of the water purifying bag Rb, enters the pipeline 6, the pipeline 3 and the pipeline 2, is conveyed to the inlet of the primary membrane component Mc through the pipeline 4, flows through the membrane surface of the Mc, washes the pollutants on the surface, then flows out from the concentrated water outlet connected with the pipeline 7 by the Mc, reaches the inlet of the secondary membrane component Md through the pipeline 9, and is discharged to the wastewater barrel Ra through the pipeline 11 by the concentrated water outlet of the Md after the external water supply purified water outlet is closed, so that the secondary purified water is not produced, but directly passes through the membrane surface of the secondary membrane component membrane Md. Until the cleaning mode condition changes, the pump is stopped. A waiting mode is entered.
Fifth) blowdown mode
Starting conditions: when the waste water cavity pressure switch Pb is also conducted; and a switch of a pollution discharge mode on the control interface is in an open state; and an external water purification mode switch on the control interface is in a closed state.
Executing the program: the water inlet of the purified water connected with the pipeline 1 is closed by the wastewater electromagnetic valve Va; and the pure water outlet connected with the pipeline 9 is closed by the concentrated water electromagnetic valve Vb; and the purified water inlet connected with the pipeline 5 is closed by the purified water solenoid valve Vc.
The specific process comprises the following steps: the pump is opened, waste water enters the pump from the waste water barrel Ra through the pipeline 1 and the pipeline 2, is conveyed to the inlet of the primary membrane component Mc through the pipeline 4, flows through the membrane surface of the Mc, is discharged from the concentrated water port connected with the pipeline 7 through the Mc, and is discharged to the waste water discharge port through the pipeline 7, so that waste water is discharged. Until the start condition of the sewage discharge mode is changed, the waiting state is entered.
The invention is further illustrated by the following examples.
Example 1 implementation of the Assembly of wastewater purifier for washing machine
The control program is written according to the control mode, a three-way electromagnetic valve and a control panel are added by utilizing part of components of the traditional household water purifier, and the washing machine wastewater purifier provided by the invention is manufactured.
The process flow diagram is shown in figure 2, wherein Ra and Rb are respectively a waste water bucket and a water purifying bag; ma, mb, mc, md, me, mf are respectively a water inlet filter bag (nylon 20 mesh filter screen), a middle filter baffle (rigid 200 mesh stainless steel mesh), a primary membrane component (UF), a secondary membrane component (RO), a water-producing activated carbon filter element TOC and a 10um precise filter element; p is a water supply pump (self-priming pump); va, vb and Vc are respectively a water inlet three-way electromagnetic valve, a concentrated water three-way electromagnetic valve and a water producing three-way electromagnetic valve; pa and Pb are respectively a water purifying bag pressure switch and a waste water cavity pressure switch.
The three views of the main body part of the wastewater purifier of the washing machine are shown in fig. 3, the three views of the double-cavity wastewater barrel of the wastewater purifier of the washing machine are shown in fig. 4, and Ra and Rb are respectively the wastewater barrel and the water purifying bag in fig. 4; ma and Mb are respectively a water inlet filter bag (nylon 20 mesh filter screen) and a middle filter baffle (rigid 200 mesh stainless steel screen).
And (3) material selection:
Primary membrane component: tubular ceramic microfiltration membrane TU
A secondary membrane module: PVDF hollow fiber ultrafiltration membrane
First-stage dense water ratio throttle valve: 10% emissions.
First-stage dense water ratio throttle valve: 5% emissions.
Recovery rate of water: 90 percent of
Example 2 washing machine application example with wastewater purifier
On the basis of the wastewater purifier of the washing machine provided in the embodiment 1, a washing machine is combined, two procedures of washing and water purification are combined together and rewritten to form an automatic control part, and finally connection is carried out, wherein the schematic diagram is shown in fig. 5, and 100 is the washing machine in fig. 5; 11 is a water inlet of the washing machine for recycling purified water; 12 is a waste water outlet of the washing machine; 20 is the washing machine wastewater purifier of the invention; 21 is a purifier wastewater inlet; and 22 is a purified water outlet of the water purifier.
In this application example, the initial flux of the membrane run is as follows:
The flux of the primary membrane component reaches 80LMH, the flux of the secondary membrane component reaches 40LMH, when the total amount of the treated washing wastewater reaches 2000L, the flux of the primary membrane component is attenuated to 60LMH, the flux of the secondary membrane component is attenuated to 30LMH, and after primary cleaning and secondary cleaning are adopted, the flux of the primary membrane component is basically recovered to 70LMH, and the secondary membrane component is not obviously recovered.
And then the wastewater cavity is emptied, after 0.1 percent of Na 2CO3 is added into the wastewater cavity, the primary and secondary cleaning is carried out, and the flux of the secondary membrane assembly is basically recovered to the initial flux of the membrane.
In the washing process, the washing water is subjected to two times of purification treatment, 20% of high-concentration sewage is discharged, 20% of new water is added, the last rinsing water enters a water storage barrel, and after being treated by a first-stage membrane assembly, the water is stored in a water purifying bag and used as the washing water for the next washing. The total water saving rate reaches more than 80 percent.
It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
In the description of the present application, it is to be understood that terms "inlet", "outlet" and the like refer to the directional ports of water flow into and out of the tub, valve and membrane; the term "primary" means that the wastewater is subjected to primary membrane filtration, and the term "secondary" means that the wastewater is subjected to primary membrane filtration, and then the purified water is subjected to primary membrane filtration. The terms "raw water", "concentrated water" and "produced water" are relative values, and refer to the water quality of the inlet membrane and the three parts of the membrane, one part of which forms a part with higher concentration and the other part of which yields lower concentration, under the filtration action of the membrane. These terms are only used to facilitate describing the application and to simplify the description, but are not intended to indicate or imply that the device or element in question must have a particular orientation, be constructed and operate in a particular orientation, and are therefore not to be construed as limiting the application. In the description of the present application, the meaning of "plurality" is two or more unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "implementations," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.

Claims (3)

1. The utility model provides a washing machine waste water purifier which characterized in that, this purifier includes at least: a multi-cavity water storage barrel and a membrane component,
The multi-cavity water storage bucket is provided with a plurality of cavities or cavities, wherein the cavities or cavities comprise at least one water purifying cavity and a waste water cavity, the waste water cavity is a storage space for waste water and part of membrane produced concentrated water, an opening filter bag is arranged at the inlet of the waste water cavity,
The multi-cavity water storage bucket is a double-cavity water storage bucket, a soft and scalable sealed bag is arranged in the multi-cavity water storage bucket, the inner cavity of the sealed bag is a clean water cavity, the cavity between the outer part of the sealed bag and the inner part of the multi-cavity water storage bucket is a waste water cavity, an intermediate filtering baffle (Mb) is arranged in the waste water cavity of the multi-cavity water storage bucket,
The sealed bag is double-layered, the outer layer is PE, PP, PET or a woven bag made of nylon, and the inner layer is a PE, PP, EVA, silicone rubber or a polymer film sealing bag made of natural rubber;
The water purifier also comprises a control system and a water supply pump, wherein the control system comprises a sensor and an actuator, the sensor is a pressure switch used in a water purifying cavity and a waste water cavity, the pressure switch of the water purifying cavity is a high-pressure switch, and the pressure switch of the waste water cavity is a low-pressure switch; on-pressure value of high-voltage switch: 0.05-0.10 MPa, off pressure value: less than or equal to 0.01 to 0.15 MPa; on-pressure value of the low-voltage switch: a break pressure value of +.0.01-0.025 MPa: 0.01 MPa; the actuator is a three-way electromagnetic valve which is divided into a waste water three-way electromagnetic valve, a concentrated water three-way electromagnetic valve and a produced water three-way electromagnetic valve, wherein the concentrated water three-way electromagnetic valve is a converging valve, and the purified water three-way electromagnetic valve is a flow dividing valve;
The membrane component is a two-stage membrane component, namely, a primary purified water and a secondary purified water are respectively prepared, namely, a deep purified water supply, and the active self-cleaning is automatically carried out on the membrane surface of the primary membrane component when the secondary membrane component is utilized to carry out secondary purification, wherein the primary membrane component is a combination of microfiltration and nanofiltration, microfiltration and ultrafiltration, microfiltration and reverse osmosis, ultrafiltration and nanofiltration, or an ultrafiltration membrane, and the secondary membrane component is an ultrafiltration, nanofiltration, a combination of ultrafiltration and nanofiltration, or a reverse osmosis membrane;
The opening filter bag is a filter mesh bag woven by nylon, metal and PET materials, and the filter aperture is 30-800 um.
2. A method for purifying waste water, which is washing waste water or washing waste water generated by a washing machine, by purifying the waste water by the water purifier of claim 1 and recycling the purified waste water, comprising the steps of:
Step 1, discharging wastewater into a wastewater cavity;
step 2, purifying the wastewater, and storing the purified water in a purified water cavity;
Step 3, deeply purifying the purified water and supplying water;
The purification in the step 2 is primary purification, and the process flow is as follows: the wastewater is filtered in the wastewater cavity through an opening filter bag and an intermediate filter baffle (Mb), and then enters a primary membrane component (Mc) through a first pipeline (1), a wastewater three-way electromagnetic valve (Va), a second pipeline (2), a water supply pump (P) and a third pipeline (4), and is subjected to primary purification; the obtained purified water enters a closed bag (Rb) serving as a water purifying cavity through a fourth pipeline (5), a water-producing three-way electromagnetic valve (Vc) and a fifth pipeline (6) and is stored for a short time for re-purification and use;
The deep purification in the step 3 is secondary purification, and the process flow is as follows: the purified water obtained in the step 2 flows through a fifth pipeline (6), a water-producing three-way electromagnetic valve (Vc), a sixth pipeline (3), a water supply pump (P) and a third pipeline (4) from a closed bag (Rb), enters a first-stage membrane assembly (Mc), and the obtained concentrated water enters a second-stage membrane assembly (Md) through a seventh pipeline (7), a concentrated water three-way electromagnetic valve (Vb) and an eighth pipeline (9), and is subjected to secondary purification, and the obtained secondary purified water is led into a washing machine through a ninth pipeline (10);
The control system is used for realizing water production, membrane cleaning, waste water discharge and water supply, wherein the water production comprises primary water production and secondary water production, the membrane cleaning comprises primary cleaning and secondary cleaning, and the control modes comprise water production, waiting, water supply, cleaning and pollution discharge modes;
The execution process of the secondary cleaning is as follows: purified water is discharged from a water outlet of the closed bag (Rb), enters a fifth pipeline (6), a sixth pipeline (3) and a second pipeline (2), enters a water supply pump (P), is conveyed to an inlet of the primary membrane assembly (Mc) through the third pipeline (4), flows through the membrane surface of the primary membrane assembly (Mc), washes off pollutants on the surface, then is discharged from a concentrated water gap connected with the seventh pipeline (7) through the primary membrane assembly (Mc), reaches an inlet of the secondary membrane assembly (Md) through an eighth pipeline (9), and is closed, so that secondary purified water is not produced directly through the membrane surface of the secondary membrane assembly (Md), and is discharged into a wastewater cavity through a tenth pipeline (11) through the concentrated water gap of the secondary membrane assembly (Md).
3. The method according to claim 2, wherein in step 1, the wastewater is laundry or wash wastewater or concentrated water produced by a secondary membrane module.
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