CN105776664A - Method for improving efficiency of producing purified water in reverse osmosis mode - Google Patents
Method for improving efficiency of producing purified water in reverse osmosis mode Download PDFInfo
- Publication number
- CN105776664A CN105776664A CN201610248328.4A CN201610248328A CN105776664A CN 105776664 A CN105776664 A CN 105776664A CN 201610248328 A CN201610248328 A CN 201610248328A CN 105776664 A CN105776664 A CN 105776664A
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- Prior art keywords
- water
- reverse osmosis
- filter
- valve
- pure water
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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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- 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
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Abstract
The invention discloses a method for improving the efficiency of producing purified water in a reverse osmosis mode. The method comprises the following steps of pretreatment, wherein system inlet water is filtered through a pre-filtering assembly to meet the inlet water quality indexes of reverse osmosis inlet water and then enters a raw water tank, the water is pumped into a second multi-media filter through a raw water pump, and a low liquid level protection switch is arranged in the raw water tank; reverse osmosis desalination, wherein the water passes through a precise filter, a chemical adding device and a reverse osmosis desalination device; purified water storage and conveying, wherein the water subjected to reverse osmosis desalination is sent to the purified water tank and sequentially passes through an ozone generator, an oxygen generator, a freezing dryer, a terminal water supply pump and a steam-water mixing pump to obtain the purified water. According to the method for improving the efficiency of producing the purified water in the reverse osmosis mode, production adopts the mode of combining a physical method serving as the main method with a chemical method serving as the assisting method, the efficiency is obviously higher than that of a general production method, by means of a backwashing technology of the multi-media filter, redundant parts in the water are removed, and the production efficiency is high.
Description
Technical field
The present invention relates to pure water production technical field, be specifically related to a kind of method improving reverse osmosis mode of manufacture pure water efficiency.
Background technology
Drinking pure water is with the water meeting drinking water sanitary standard for raw material, is prepared by electroosmose process, ion exchange, hyperfiltration, the way of distillation and other suitable processing methods, is sealed in container and without any additive water capable of direct drinking.It is known that, along with the raising of people's living standard in last decade, people are more and more higher to the requirement of drinking water, country's " drinking water sanitary standard " (GB5749-2006) enforcement in 1 day July in 2007, Indicator for Drinking Water Quality in new standard is increased to 106 by the 35 of primary standard, wherein organic compound index adds 48, reflects people's attention to drinking water safety.It is seen everywhere in life than the pure water of tap water more clean and safe, and also is developing towards more commonly higher-quality direction.The sense organ of pure water, physics and chemistry, the no longer difficulty up to standard of the conventional index such as microorganism.But, a large amount of uses of synthetic organic compound in recent years, the organic pollution making the not high harm of increasing concentration but very big is found in drinking water source, Rao Jun et al. research shows, recently as developing rapidly of industry, Drinking Water in China seedbed is polluted by organic matter increasingly severe.Cao Bo et al. GC/MS method has detected the organic pollutions such as phthalate and PAHs at Jia Lingjiang River water head site.And the research about the organic extracts from water of reverse osmosis process production rarely has report.
Owing to the demand of water is increasing, the pollution of the development feedwater of society brings increasing impact, therefore, produce pure water to need to guarantee two necessary factors, efficiency and degree of purity, herein by based on physical method, the mode that chemical method is auxiliary combination produces, and efficiency is apparently higher than general production method.
Summary of the invention
For problem above, the invention provides a kind of method improving reverse osmosis mode of manufacture pure water efficiency, it is possible to effectively solve the problem in background technology.
To achieve these goals, the technical solution used in the present invention is as follows: a kind of method improving reverse osmosis mode of manufacture pure water efficiency, comprises the steps:
(1) pretreatment: system water inlet first passes through the filtration of pre-filtering assembly and makes to reach the influent quality index of feed water by reverse osmosis, subsequently into raw water box, pumps into the second more medium filter by raw water pump, has low level protecting switch in raw water box；
(2) reverse osmosis desalination: step (1) water outlet sequentially passes through accurate filter, chemicals dosing plant and Reverse Osmosis Desalination Process Equipment；
(3) pure water stores and conveying: through the water of reverse osmosis desalination, sends into pure water tank, and passes sequentially through ozonator, oxygen generator, freezer dryer, terminal water supplying pump and steam-water mixing pump and obtain pure water.
According to such scheme, pre-filtering assembly includes manganese sand filter, the first more medium filter and active carbon filter, and use order is manganese sand filter, the first more medium filter and active carbon filter.
According to such scheme, described second more medium filter needs to carry out backwash operation: the steps include: to open valve → closedown outlet valve → open backwash valve → closedown water intaking valve → flushing 5 to 10 minutes → open intake valve and add lower valve → passs of compression air → purging 5 to 10 minutes → stopping supply → washing 15 to 30 minutes → open close valve → open water intaking valve → closedowns backwash valve water intaking valve → just washing 5 to 10 minutes → close under valve → backwash terminate entrance duty.
According to such scheme, the accurate filter in step (2) filters because of filter material layer leakage with particulate contamination.
According to such scheme, the accurate filter in step (2) is built with polypropylene melt blown filter, and it retains precision is 5um, and filter type is external-compression type.
According to such scheme, the Reverse Osmosis Desalination Process Equipment in step (2) adopts two steps ro membrane module.
According to such scheme, after Reverse Osmosis Desalination Process Equipment runs a period of time in step (2), carrying out Chemical cleaning, the frequency of Chemical cleaning is determined according to the flooded condition of Reverse Osmosis Desalination Process Equipment.
Beneficial effects of the present invention:
The present invention adopts based on physical method, the mode that chemical method is auxiliary combination produces, efficiency is apparently higher than general production method, pretreatment and reverse osmosis desalination part to water carry out tight design, by the combination of various types of filtration device, and by the backwash process of the device of multi-medium filtering, remove part unnecessary in water, production efficiency is high, controls the pH value of water only by chemicals dosing plant, does not adopt other chemical reagent to pass through the degree of purity of the water of the effect raising of reverse osmosis unit.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Embodiment
A kind of method improving reverse osmosis mode of manufacture pure water efficiency, comprises the steps:
(1) pretreatment: system water inlet reaches the water quality index of feed water by reverse osmosis after the filtration treatment of pre-filtering assembly; it is re-fed into raw water box; the Chemical cleaning cycle of reverse osmosis membrane can be extended and improve its service life; raw water pump delivers to the second more medium filter water inlet from raw water box water suction by raw water pipeline; it is provided with low level protecting switch in raw water box, protects raw water pump；Pre-filtering assembly includes manganese sand filter, the first more medium filter and active carbon filter, and use order is manganese sand filter, the first more medium filter and active carbon filter；
Wherein, the second more medium filter needs to carry out backwash operation: the steps include: to open valve → closedown outlet valve → open backwash valve → closedown water intaking valve → flushing 5 to 10 minutes → open intake valve and add lower valve → passs of compression air → purging 5 to 10 minutes → stopping supply → washing 15 to 30 minutes → open close valve → open water intaking valve → closedowns backwash valve water intaking valve → just washing 5 to 10 minutes → close under valve → backwash terminate entrance duty.
(2) reverse osmosis desalination: sequentially pass through accurate filter, chemicals dosing plant and Reverse Osmosis Desalination Process Equipment；Accurate filter filters because of filter material layer leakage with particulate contamination；Accurate filter is built with polypropylene melt blown filter, and it retains precision is 5um, and filter type is external-compression type；Reverse Osmosis Desalination Process Equipment adopts two steps ro membrane module；After Reverse Osmosis Desalination Process Equipment runs a period of time, reverse osmosis membrane can be subject in feedwater the pollution of float that may be present or indissoluble material, and reverse osmosis membrane assembly needs to do the Chemical cleaning of necessity, and the frequency of Chemical cleaning is determined according to the flooded condition of reverse osmosis unit.
(3) pure water stores and conveying: through the water of reverse osmosis desalination, sends into pure water tank, and passes sequentially through ozonator, oxygen generator, freezer dryer, terminal water supplying pump and steam-water mixing pump and obtain pure water.
Present system forms:
(1) preprocessing part: include pre-filtering assembly, raw water box, pipeline pump, the second more medium filter, accurate filter.
Pre-filtering assembly includes manganese sand filter, the first more medium filter and active carbon filter; raw water box is sent into after being filtered; influent quality meets feed water by reverse osmosis requirement; raw water pump delivers to the second more medium filter water inlet from raw water box water suction by raw water pipeline; and low level protecting switch is set in raw water box, protect raw water pump；Second more medium filter belongs to preprocessing system, adopts manual operation for reducing cost, and equipment material is rustless steel.This device systems is in water flowing state when running, and takes timing backwash (manual operation) according to the working cycle, and during backwash, respectively the second more medium filter passes into compression air as required, improves backwash effect.
(2) Reverse Osmosis Desalination Process Equipment: include high-pressure pump, reverse osmosis membrane assembly and chemically-cleaning device.
Reverse Osmosis Desalination Process Equipment, reverse osmosis equipment is properly functioning is by terminal pure water tank liquid level signal, starts or stops；
1) high-pressure pump variable frequency starting.
2) automatic entry condition.Flow condition is low-voltage variation; low-voltage protective switch is set between accurate filter and high-pressure pump; when the force value of system water pushing pressure is lower than setting value 0.1Mpa, switch board low-voltage variation starts, and reverse osmosis high-pressure pump can not start or stop the system being currently running.Entry condition is the liquid-level switch action when pure water tank liquid level drops to setting position (adjustable), connects system PLC, and the equipment that completes starts.
3) manually boot.It is switched to manual mode, is controlled by switch board order button completion system.
4) system protection.When high-pressure pump intake pressure is lower than setting value, it is impossible to start or make operational outfit shut down.When startup completes or is currently running due to the system failure, when causing that system is intrinsic pressure to be insisted on height of continuing rising and exceed high voltage protective setting value, high voltage protective action, system PLC commander equipment is shut down.
5) equipment downtime.Pure water tank liquid level is in the high liquid level of setting (adjustable), orderly closedown.The system failure, system protection forced stoppage；Pretreatment fault, raw water pump is shut down all can cause system-down；Burst phenomenon emergency shutdown.
6) water Water-quality control is produced.Equipment produces water terminal and is located at line (digital display) conductance controller.
7) auto-flushing.Equipment sets start or shutdown low-pressure washing, delays fouling tendency.
8) chemicals dosing plant.Add hydrochloric acid, reduce pH value and interlock with reverse osmosis high-pressure pump.
9) reverse osmosis Chemical cleaning adopts hand gear to complete.
(3) pure water stores/conveying: pure water tank, ozonator, oxygen generator, freezer dryer, terminal water supplying pump and steam-water mixing pump.
Storing water is not secondary polluted to adopt ozone equipment to guarantee, ozone adds employing bypass circuit, can manually adjust the output concentration of ozonator, and change the ozone concentration of product water by adjusting bypass circuit flow.
(4) system controls: include PLC, liquid-level switch, pressure switch, imitation screen switch board.
1) system adopts PLC that water inlet, systems pumps, product water water quality are effectively controlled, it is achieved system automatically works and runs and switching manual work state, and completion system cleans.
2) system control cabinet panel sets modeling process chart, and sets Light-Emitting Diode work instruction in capital equipment place.
3) each capital equipment is equipped with inlet gage, it is simple to recording equipment operating pressure drop.
4) reverse osmosis main frame is provided with dense, plain water flow meter, for recording equipment aquifer yield.
5) reverse osmosis main frame is provided with the online conductivity meter of water-in and water-out, facilitates record analysis equipment work efficiency, and controls product water quality by producing water conductivity meter feedback signal.
The principle of more medium filter and purposes: meet the equipment requirement to influent quality.The water inlet of reverse osmosis is through the pressurization of pressure of multistage vertical centrifugal pump, and the blade of pressure of multistage vertical centrifugal pump is at running high speed rotating, if there is particulate matter in water, under relative high speed, the blade of water pump is easy for being wounded by particulate matter.Reverse osmosis membrane is thin layer, very tender and lovely composite membrane, if the granule in water is too big, is easy for piercing through reverse osmosis membrane under high pressure effect, causes reverse osmosis membrane leakage ion aggravation, and salt rejection rate declines, and service life reduces.
More medium filter inner filtering layer is constituted: in filter, multimedium filtrate is the equal grain gravel of high-quality, quartz sand, magnetic iron ore, anthracite etc..These filtrates are distributed in filter canister body according to the size of its proportion and particle diameter scientific order, the anthracite that particle diameter is slightly larger as proportion is little is placed on the superiors of filter bed, the quartz sand that proportion is moderate and particle diameter is little is placed on the middle level of filter bed, is placed on the orlop of filter bed than great and that particle diameter is big gravel.Such proportioning ensure that filter will not produce random layer phenomenon when carrying out backwash, thus ensure that the interception capacity of filtrate.
The operation principle of more medium filter: utilize the hole that filtrate forms, retains impurity such as the silt in former water, colloid, float.Owing to filtrate has carried out science distribution, so filter bed is fine to the rejection effect of impurity, effluent characteristics is also greatly improved.The filtering accuracy of filter reaches as high as 10um.Meanwhile, the impurity in water is progressively retain by filter bed, and each metafiltration material in such tank body will obtain full and uniform utilization, and effective filtering layer is high, thus extending the life cycle of filtrate, reducing number of backwashes and backwash water consumption, decreasing the operating cost of equipment.
The backwash of filtrate: filter arranges timing automatic startup backwash according to the water quality condition of water inlet, just washes operation.By backwash, the impurity being trapped in filtrate gap is developed, then just washes, stablize filter material layer, to recover its filtering efficiency.
The operation principle of accurate filter: well water is through manganese sand filter, more medium filter, after the filtration of active carbon filter, once in a while also can because of filter material layer leakage with particulate contamination in water, reverse osmosis membrane and vertical multi-stage centrifugal pump are all existed potentially hazardous by these granules, by at accurate filter built with polypropylene melt blown filter, it retains precision is 5um, filter type is external-compression type, the float being mainly used in removing in water more than 5um, the impurity such as particulate matter and colloidal particles, thus ensureing to meet the requirement of reverse osmosis unit water inlet SDI value, reach the purpose of protection reverse osmosis membrane.
The present invention adopts based on physical method, the mode that chemical method is auxiliary combination produces, efficiency is apparently higher than general production method, pretreatment and reverse osmosis desalination part to water carry out tight design, by the combination of various types of filtration device, and by the backwash process of the device of multi-medium filtering, remove part unnecessary in water, production efficiency is high, controls the pH value of water only by chemicals dosing plant, does not adopt other chemical reagent to pass through the degree of purity of the water of the effect raising of reverse osmosis unit.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (7)
1. the method improving reverse osmosis mode of manufacture pure water efficiency, it is characterised in that comprise the steps:
(1) pretreatment: system water inlet first passes through the filtration of pre-filtering assembly and makes to reach the influent quality index of feed water by reverse osmosis, subsequently into raw water box, pumps into the second more medium filter by raw water pump, has low level protecting switch in raw water box；
(2) reverse osmosis desalination: step (1) water outlet sequentially passes through accurate filter, chemicals dosing plant and Reverse Osmosis Desalination Process Equipment；
(3) pure water stores and conveying: through the water of reverse osmosis desalination, sends into pure water tank, and passes sequentially through ozonator, oxygen generator, freezer dryer, terminal water supplying pump and steam-water mixing pump and obtain pure water.
2. a kind of method improving reverse osmosis mode of manufacture pure water efficiency according to claim 1, it is characterized in that, described pre-filtering assembly includes manganese sand filter, the first more medium filter and active carbon filter, and use order is manganese sand filter, the first more medium filter and active carbon filter.
3. a kind of method improving reverse osmosis mode of manufacture pure water efficiency according to claim 1, it is characterized in that, described second more medium filter needs to carry out backwash operation: the steps include: to open valve → closedown outlet valve → open backwash valve → closedown water intaking valve → flushing 5 to 10 minutes → open intake valve and add lower valve → passs of compression air → purging 5 to 10 minutes → stopping supply → washing 15 to 30 minutes → open close valve → open water intaking valve → closedowns backwash valve water intaking valve → just washing 5 to 10 minutes → close under valve → backwash terminate entrance duty.
4. a kind of method improving reverse osmosis mode of manufacture pure water efficiency according to claim 1, it is characterised in that the accurate filter in step (2) filters because of filter material layer leakage with particulate contamination.
5. a kind of method improving reverse osmosis mode of manufacture pure water efficiency according to claim 1, it is characterised in that the accurate filter in step (2) is built with polypropylene melt blown filter, and it retains precision is 5um, and filter type is external-compression type.
6. a kind of method improving reverse osmosis mode of manufacture pure water efficiency according to claim 1, it is characterised in that the Reverse Osmosis Desalination Process Equipment in step (2) adopts two steps ro membrane module.
7. a kind of method improving reverse osmosis mode of manufacture pure water efficiency according to claim 1, it is characterized in that, after Reverse Osmosis Desalination Process Equipment runs a period of time in step (2), carrying out Chemical cleaning, the frequency of Chemical cleaning is determined according to the flooded condition of Reverse Osmosis Desalination Process Equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610248328.4A CN105776664A (en) | 2016-04-20 | 2016-04-20 | Method for improving efficiency of producing purified water in reverse osmosis mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610248328.4A CN105776664A (en) | 2016-04-20 | 2016-04-20 | Method for improving efficiency of producing purified water in reverse osmosis mode |
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| CN105776664A true CN105776664A (en) | 2016-07-20 |
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| CN201610248328.4A Pending CN105776664A (en) | 2016-04-20 | 2016-04-20 | Method for improving efficiency of producing purified water in reverse osmosis mode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108191120A (en) * | 2018-03-08 | 2018-06-22 | 湖南水口山有色金属集团有限公司 | A kind of Water Treatment equipment |
| CN110818026A (en) * | 2019-12-31 | 2020-02-21 | 苏州伟志水处理设备有限公司 | Automatic operation method for primary reverse osmosis of water treatment |
-
2016
- 2016-04-20 CN CN201610248328.4A patent/CN105776664A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108191120A (en) * | 2018-03-08 | 2018-06-22 | 湖南水口山有色金属集团有限公司 | A kind of Water Treatment equipment |
| CN110818026A (en) * | 2019-12-31 | 2020-02-21 | 苏州伟志水处理设备有限公司 | Automatic operation method for primary reverse osmosis of water treatment |
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Application publication date: 20160720 |
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