CN105347440A - Backwashing system and process for filter membrane cleaning - Google Patents
Backwashing system and process for filter membrane cleaning Download PDFInfo
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- CN105347440A CN105347440A CN201510766797.0A CN201510766797A CN105347440A CN 105347440 A CN105347440 A CN 105347440A CN 201510766797 A CN201510766797 A CN 201510766797A CN 105347440 A CN105347440 A CN 105347440A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/04—Backflushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/12—Use of permeate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/14—Use of concentrate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a backwashing system and process for filter membrane cleaning, and belongs to the technical field of water treatment. The backwashing system for filter membrane cleaning includes a backwashing water pump, a backwashing water pool for storing used backwashing water, and an addition device. A water inlet of the backwashing water pump is communicated with a coarse salt water pool in a reverse osmosis system through a pipeline and a valve, and a water outlet of the backwashing water pump is communicated with an ultrafiltration membrane group in an ultrafiltration system through a pipeline and a valve. The addition device is used for adding an indicator for indicating whether filter membranes in the ultrafiltration membrane group are washed cleanly, and the addition device is communicated with a pipeline connecting the backwashing water pump and the ultrafiltration membrane group through pipelines. The backwashing system provided by the invention is cleverly arranged in a first-level desalted water preparation system, by-product water in the preparation of first-level desalted water is blended to be used as backwashing water for cleaning and backwashing the filter membranes of the ultrafiltration membrane group, cooperation is good, arrangement is convenient, and the utilization rate of water resources is improved.
Description
Technical field
The present invention relates to water-treatment technology field, particularly relate to a kind of backwashing system and technique thereof of cleaning filter membranes.
Background technology
Along with the day by day in short supply of water resources and the increase day by day of industrial process waters amount, the recovery and utilization technology of water is primary study direction always, a lot of water technology is had to come out in recent years, common as microorganism treatment, membrane technique facture, reverse-osmosis treated method, ion exchange treatment etc., but the personalisation process scheme lacked for the specific water quality in specific region, therefore treatment effect is not fully up to expectations.
Water quality difference under the difference of region, time is very large, on the basis that existing water technology develops, searches out a kind of combined treatment process, can meet local water quality situation, obtain qualified process water, is a problem being worth inquiring into.
The use water of general industry water, especially petrochemical field, needs water quality to reach the demand of one-level de-mineralized water, and most enterprise takes to use fresh underground water to obtain one-level de-mineralized water through process.This method is very big to the demand of Natural Water, and needs process further, wastes great manpower and materials.Adopting sanitary sewage to prepare one-level de-mineralized water is a kind of process water source method that cost is low.But in such a process, because the impurity in sanitary sewage is more, the module of each process needs to carry out periodic cleaning and could keep original processing efficiency.Carrying out backwash process to module especially ultrafiltration module is a kind of effective manner of cleaning up.Whether, in the system of existing preparation one-level de-mineralized water, to the cleaning imperfection of film group, clean can not judge in time filter membrane, cleaning system can not the use of supporting whole system.
Summary of the invention
Whether the problem to be solved in the present invention is in the system of existing preparation one-level de-mineralized water, to the cleaning imperfection of film group, clean can not judge in time filter membrane, can not the use of corollary system.
First object of the present invention is the backwashing system providing a kind of cleaning filter membranes be arranged in preparation one-level DW system demineralized water system, coordinates, utilize the water in system to carry out backwash or other process as backwash water to device with existing one-level DW system demineralized water system.
The backwashing system of described cleaning filter membranes is connected with reverse osmosis system with ultrafiltration system respectively, comprises backwash water pump, deposits the backwash pond of used backwash water and adder.The water inlet of described backwash water pump is connected with the crude salt pond in reverse osmosis system with valve by pipeline, and the water outlet of backwash water pump is connected with the ultra-filtration membrane group in ultrafiltration system with valve by pipeline.Backwash pond is connected with ultra-filtration membrane group.The indicator whether described adder is cleaned for adding instruction ultra-filtration membrane group, its by pipeline be connected the pipeline of backwash water pump with ultra-filtration membrane group and be connected.
Further, the water-in of described backwash water pump also produces pond by pipeline with valve and the ultrafiltration in ultrafiltration system and is connected.
Preferably, the water outlet of described backwash water pump is also connected with the more medium filter in ultrafiltration system with valve by pipeline, and backwash pond is connected with more medium filter with valve by pipeline.
Preferably, the water outlet of described backwash water pump is also connected with the opening for feed of valve with the cartridge filter in reverse osmosis system by pipeline.
Second object of the present invention is to provide a kind of preparation one-level DW system demineralized water system comprising above-mentioned backwashing system.Described preparation one-level DW system demineralized water system, comprises the backwashing system of above-mentioned cleaning filter membranes, and also comprise the ultrafiltration system, reverse osmosis system and the ion exchange system that connect in turn, described backwashing system is connected with reverse osmosis system with ultrafiltration system respectively.
Ultrafiltration system comprises the following equipment connected successively: water collecting basin, water collecting basin lift pump, equalizing tank, multimedium service pump, more medium filter, self-cleaning filter, ultra-filtration membrane group, ultrafiltration produce pond.Reverse osmosis system comprise connect successively reverse osmosis booster pump, cartridge filter, high-pressure pump, reverse osmosis membrane group, reverse osmosis produced pond.Described reverse osmosis booster pump and ultrafiltration are produced pond and are connected.
Described backwashing system comprising backwash water pump, depositing the backwash pond of used backwash water and the adder for adding the indicator whether instruction ultra-filtration membrane group is cleaned.The water inlet of described backwash water pump is connected with crude salt pond with valve by pipeline, the water outlet of backwash water pump is connected with ultra-filtration membrane group with valve by pipeline, and the flow direction in ultra-filtration membrane group of the water in backwash water pump is contrary with the flow direction of water in ultrafiltration system.Backwash pond is connected with ultra-filtration membrane group, collects and stores used backwash water.Described adder by pipeline be connected the pipeline of backwash water pump with ultra-filtration membrane group and be connected.
Preferably, the water-in of described backwash water pump also produces pond by pipeline with valve and ultrafiltration and is connected.
Preferably, the water outlet of described backwash water pump is also connected with more medium filter with the opening for feed of cartridge filter with valve respectively by pipeline, and backwash pond is connected with more medium filter with valve by pipeline.
Further, described ultra-filtration membrane group is provided with ultrafiltration cross-flow pipeline, and its water outlet is connected with equalizing tank with valve mutually by pipeline.
3rd object of the present invention is the backwash process providing a kind of cleaning filter membranes, is arranged in the technique of whole preparation one-level de-mineralized water.Described backwash process, utilizes ultrafiltration water in the crude brine and a part of ultrafiltration technology obtained in reverse osmosis process as backwash water, to the filter membrane of ultrafiltration module carries out backwash after adding indicator in backwash water.
Described indicator is acid or alkali, and the flow direction of backwash water in ultra-filtration membrane group is contrary with the flow direction of water in ultrafiltration technology.
4th object of the present invention is to provide a kind of technique preparing one-level de-mineralized water.In the technique of described preparation one-level de-mineralized water, former water through ultrafiltration technology, reverse osmosis process and ion exchange process process, obtains one-level de-mineralized water successively.
In described ultrafiltration technology, former water carries out multi-medium filtering, self-cleaning filtering after pH regulator, carries out ultrafiltration afterwards in ultra-filtration membrane group, obtains ultrafiltration water.Also be provided with ultrafiltration cross-flow pipeline in ultra-filtration membrane group, the water of ultrafiltration cross-flow mixes with former water and carries out pH regulator.
In reverse osmosis process, ultrafiltration water carries out security personnel and filters after supercharging, and continuation supercharging afterwards enters reverse osmosis membrane group and carries out reverse-osmosis treated, obtains crude brine and reverse osmosis water respectively.Reverse osmosis water obtains one-level de-mineralized water through ion exchange process process.
Former water, while above-mentioned three grades of art breading, also carries out backwash process process.In backwash process, the ultrafiltration water of crude brine and a part is as backwash water.Process ultra-filtration membrane group after part backwash water adds indicator, described indicator is acid or alkali.The backwash water of a part is cleaned multi-medium filtering device.Join in reverse-osmosis treated as reverse osmosis medicament after part backwash water adds Scale inhibitors and reductive agent.
The advantage that the present invention has and positively effect are: (1) backwashing system provided by the invention, be arranged in preparation one-level DW system demineralized water system dexterously, utilize the byproduct water of preparation one-level de-mineralized water through allotment as backwash water, device in preparation one-level DW system demineralized water system is cleared up, backwash, no-float, arrange conveniently, improve the utilization ratio of water resources.(2) in backwashing system provided by the invention, be provided with adder, for adding indicator, when making backwash water clean ultra-filtration membrane group, judge whether to clean up ultra-filtration membrane group according to whether producing precipitation, improve backwash efficiency.(3) in backwashing system provided by the invention, backwash water can also be cleaned the more medium filter in ultrafiltration system, also can enter reverse osmosis system as the solvent of reverse osmosis medicament, further increase the utilization ratio of byproduct water.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of one-level DW system demineralized water system in the present invention.
Embodiment
For a better understanding of the present invention, below in conjunction with specific embodiments and the drawings, the present invention is conducted further description.
As shown in Figure 1, one prepares one-level DW system demineralized water system, comprises the backwashing system of cleaning filter membranes, and the ultrafiltration system connected in turn, reverse osmosis system and ion exchange system, backwashing system is connected with reverse osmosis system with ultrafiltration system respectively.
Ultrafiltration system comprises the following equipment connected successively: water collecting basin, water collecting basin lift pump, equalizing tank, multimedium service pump, more medium filter, self-cleaning filter, ultra-filtration membrane group, ultrafiltration produce pond.Ultra-filtration membrane group is provided with ultrafiltration cross-flow pipeline, and its water outlet is connected with equalizing tank with valve mutually by pipeline, decreases the outer row of water, saving water resource.Self-cleaning filter is that a kind of filter screen that utilizes directly tackles impurity in water; remove water body recovery technology, particulate matter, reduce turbidity, purify water; the generations such as minimizing system dirt, bacterium algae, corrosion, with the precision equipment purified water and other equipment of securing system normally work.
Reverse osmosis system comprise connect successively reverse osmosis booster pump, cartridge filter, high-pressure pump, reverse osmosis membrane group, reverse osmosis produced pond.Reverse osmosis booster pump and ultrafiltration are produced pond and are connected.The effect of cartridge filter retains to produce from prime the particle being greater than 5 μm that water leaks or the external world brings into, prevent it from entering reverse osmosis system, this type of particle may puncture reverse osmosis membrane assembly after high-pressure pump is accelerated, and causes a large amount of situation of leaking salt, scratches the impeller of high-pressure pump simultaneously.
Ion exchange system comprises the following equipment connected successively: ion-exchange service pump, cation bed, weak anion bed, anion bed, desalination pond, ion-exchange service pump is connected with reverse osmosis produced pond.The one-level de-mineralized water obtained by desalination pond is supplied to user for pump by outer.
Backwashing system comprising backwash water pump, depositing the backwash pond of used backwash water and the adder for adding the indicator whether instruction ultra-filtration membrane group is cleaned.
The water inlet of backwash water pump produces pond with crude salt pond and ultrafiltration by pipeline respectively with valve and is connected, and the water outlet of backwash water pump is connected with the opening for feed of ultra-filtration membrane group, more medium filter, cartridge filter with valve respectively by pipeline.Water in backwash water pump flow direction in ultra-filtration membrane group is contrary with the flow direction of water in ultrafiltration system.Backwash pond is connected with ultra-filtration membrane group.Adder by pipeline be connected the pipeline of backwash water pump with ultra-filtration membrane group and be connected.
Prepare a technique for one-level de-mineralized water, former water through ultrafiltration technology, reverse osmosis process and ion exchange process process, obtains one-level de-mineralized water successively.
In ultrafiltration technology, former water carries out multi-medium filtering, self-cleaning filtering after pH regulator, carries out ultrafiltration afterwards in ultra-filtration membrane group, obtains ultrafiltration water.Also be provided with ultrafiltration cross-flow pipeline in ultra-filtration membrane group, the water of ultrafiltration cross-flow mixes with former water and carries out pH regulator.
In reverse osmosis process, ultrafiltration water carries out security personnel and filters after supercharging, and continuation supercharging afterwards enters reverse osmosis membrane group and carries out reverse-osmosis treated, obtains crude brine and reverse osmosis water respectively.Reverse osmosis water obtains one-level de-mineralized water through ion exchange treatment.
Former water, while above-mentioned tertiary treatment, also carries out backwash process process.In backwash process, the ultrafiltration water of crude brine and a part is as backwash water.Process ultra-filtration membrane group after part backwash water adds indicator, indicator is acid or alkali.The backwash water of a part is cleaned multi-medium filtering device.Join in reverse-osmosis treated as reverse osmosis medicament after part backwash water adds Scale inhibitors and reductive agent.
Specifically, former water enters water collecting basin, through water collecting basin lift pump, is promoted to equalizing tank, be adjusted to suitable ph, then enter multimedium service pump, via the effect of service pump, enter more medium filter, filter out the suspended impurity of 80%, then enter self-cleaning filter, then enter ultra-filtration membrane group, obtain ultrafiltration water.Ultrafiltration cross-flow Water Sproading enters equalizing tank, again utilizes.
Ultrafiltration water enters ultrafiltration and produces pond, then through reverse osmosis booster pump, enters cartridge filter, through high-pressure pump pressurization, enters reverse osmosis membrane group, obtains reverse osmosis water.
Reverse osmosis water enters reverse osmosis produced pond, then after the pressurization of ion service pump, enters cation bed, weak anion bed, anion bed respectively, removes the zwitterion in water, obtains one-level de-mineralized water, enter desalination pond, then supplies to user for pump through outer.Cation bed, weak anion bed, anion bed are respectively arranged with regeneration pond, after the water of output is regenerated, and recycling.
By-product strong brine while obtaining reverse-osmosis treated water in reverse-osmosis treated, enters strong brine pond.The ultrafiltration water that strong brine in strong brine pond and ultrafiltration are produced in pond is communicated with the water-in of backwash water pump with the control of valve by pipeline, and valve the two ratio adjustable, backwash water pump outlet place obtains backwash water.
The backwash water of a part, as the solvent of reverse osmosis medicament, enters cartridge filter after adding Scale inhibitors and reductive agent.The backwash water of a part also can be used as the water for cleaning of more medium filter.After a part of backwash water adds indicator, backwash is carried out to the filter membrane of ultra-filtration membrane group.Indicator is acid or alkali, and impurity remaining on indicator and filter membrane react, and generation precipitates, therefore, whether observe the backwash water flowing out ultra-filtration membrane group has precipitation can judge whether the filter membrane of ultra-filtration membrane group cleans up, judgment mode simple and fast, save the consumption of backwash water, save the backwash time.
Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the scope of the invention change and improve, and all should still belong within this patent covering scope.
Claims (10)
1. a backwashing system for cleaning filter membranes, is arranged in the system of preparation one-level de-mineralized water, is connected, it is characterized in that: comprise backwash water pump, deposit the backwash pond of used backwash water and adder with ultrafiltration system with reverse osmosis system;
The water inlet of described backwash water pump is connected with the crude salt pond in reverse osmosis system with valve by pipeline, and the water outlet of backwash water pump is connected with the ultra-filtration membrane group in ultrafiltration system with valve by pipeline;
Backwash pond is connected with ultra-filtration membrane group;
The indicator whether described adder is cleaned for the filter membrane added in instruction ultra-filtration membrane group, its by pipeline be connected the pipeline of backwash water pump with ultrafiltration module and be connected.
2. the backwashing system of cleaning filter membranes according to claim 1, is characterized in that: the water-in of described backwash water pump also produces pond by pipeline with valve and the ultrafiltration in ultrafiltration system and is connected.
3. the backwashing system of cleaning filter membranes according to claim 2, it is characterized in that: the water outlet of described backwash water pump is also connected with the more medium filter in ultrafiltration system with valve by pipeline, and backwash pond is connected with more medium filter with valve by pipeline.
4. the backwashing system of cleaning filter membranes according to claim 2, is characterized in that:: the water outlet of described backwash water pump is also connected with the opening for feed of valve with the cartridge filter in reverse osmosis system by pipeline.
5. prepare the system of one-level de-mineralized water for one kind, comprise the backwashing system described in claim 1-4, it is characterized in that: also comprise the ultrafiltration system, reverse osmosis system and the ion exchange system that connect in turn, described backwashing system is connected with reverse osmosis system with ultrafiltration system respectively;
Ultrafiltration system comprises the following equipment connected successively: water collecting basin, water collecting basin lift pump, equalizing tank, multimedium service pump, more medium filter, self-cleaning filter, ultra-filtration membrane group, ultrafiltration produce pond;
Reverse osmosis system comprise connect successively reverse osmosis booster pump, cartridge filter, high-pressure pump, reverse osmosis membrane group, reverse osmosis produced pond;
Described reverse osmosis booster pump and ultrafiltration are produced pond and are connected;
Described backwashing system comprising backwash water pump, depositing the backwash pond of used backwash water and the adder for adding the indicator whether instruction ultra-filtration membrane group is cleaned;
The water inlet of described backwash water pump is connected with crude salt pond with valve by pipeline, and the water outlet of backwash water pump is connected with ultra-filtration membrane group with valve by pipeline; Water in backwash water pump flow direction in ultrafiltration module is contrary with the flow direction of water in ultrafiltration system; Backwash pond is connected with ultra-filtration membrane group; Described adder by pipeline be connected the pipeline of backwash water pump with ultrafiltration module and be connected.
6. preparation one-level DW system demineralized water system according to claim 5, is characterized in that: the water-in of described backwash water pump also produces pond by pipeline with valve and ultrafiltration and is connected.
7. the preparation one-level DW system demineralized water system according to claim 5 or 6, it is characterized in that: the water outlet of described backwash water pump is also connected with more medium filter with the opening for feed of cartridge filter with valve respectively by pipeline, and backwash pond is connected with more medium filter with valve by pipeline.
8. preparation one-level DW system demineralized water system according to claim 5, is characterized in that: described ultrafiltration module is provided with ultrafiltration cross-flow pipeline, and its water outlet is connected with equalizing tank with valve mutually by pipeline.
9. a backwash process for cleaning filter membranes, is characterized in that: utilize ultrafiltration water in the crude brine and a part of ultrafiltration technology obtained in reverse osmosis process as backwash water, to the filter membrane of ultrafiltration module carry out backwash after adding indicator in backwash water;
Described indicator is acid or alkali, and the flow direction of backwash water in ultra-filtration membrane group is contrary with the flow direction of water in ultrafiltration technology.
10. prepare a technique for one-level de-mineralized water, comprise backwash process according to claim 9, it is characterized in that: former water through ultrafiltration technology reason, reverse osmosis process and ion exchange process process, obtains one-level de-mineralized water successively;
In described ultrafiltration technology, former water carries out multi-medium filtering, self-cleaning filtering after pH regulator, carries out ultrafiltration afterwards in ultra-filtration membrane group, obtains ultrafiltration water; Also be provided with ultrafiltration cross-flow pipeline in ultrafiltration module, the water of ultrafiltration cross-flow mixes with former water and carries out pH regulator;
In reverse osmosis process, ultrafiltration water carries out security personnel and filters after supercharging, and continuation supercharging afterwards enters reverse osmosis module and carries out reverse-osmosis treated, obtains crude brine and reverse osmosis water respectively; Reverse osmosis water obtains one-level de-mineralized water through ion exchange process process;
Former water, while above-mentioned three grades of art breading, also carries out backwash process process;
In backwash process, the ultrafiltration water of crude brine and a part is as backwash water; Process ultrafiltration module after part backwash water adds indicator, described indicator is acid or alkali; The backwash water of a part is cleaned multi-medium filtering device; Join in reverse-osmosis treated as reverse osmosis medicament after part backwash water adds Scale inhibitors and reductive agent.
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| CN201510766797.0A CN105347440A (en) | 2015-11-11 | 2015-11-11 | Backwashing system and process for filter membrane cleaning |
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| CN201510766797.0A CN105347440A (en) | 2015-11-11 | 2015-11-11 | Backwashing system and process for filter membrane cleaning |
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| CN105858961A (en) * | 2016-05-09 | 2016-08-17 | 深圳恒通源环保科技有限公司 | Micro-fluctuation filtering system and method |
| CN107789989A (en) * | 2017-11-24 | 2018-03-13 | 内蒙古农业大学 | A kind of preventative method for disinfection of reverse osmosis membrane whole process |
| CN107321186B (en) * | 2017-08-16 | 2018-04-13 | 北京北控海创科技有限公司 | A kind of nanofiltration, the online reverse cleaning method and device of the hyperosmosis of reverse osmosis membrane |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108928948A (en) * | 2018-08-28 | 2018-12-04 | 山东禹王生态食业有限公司 | A kind of filter cleaning system |
| CN108928948B (en) * | 2018-08-28 | 2021-02-19 | 山东禹王生态食业有限公司 | Filter cleaning system |
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