CN104437098B - Forward direction is walked and expects reverse cleaning membrane system - Google Patents
Forward direction is walked and expects reverse cleaning membrane system Download PDFInfo
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- CN104437098B CN104437098B CN201410717073.2A CN201410717073A CN104437098B CN 104437098 B CN104437098 B CN 104437098B CN 201410717073 A CN201410717073 A CN 201410717073A CN 104437098 B CN104437098 B CN 104437098B
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Abstract
The present invention discloses a kind of forward direction and walks to expect reverse cleaning membrane system, main N levels series connection membrane stack (N ＞ 1) for including arranging from front to back of membranous system composition, coupled together by a public pipe, material (water) is filtered through relay step by step after membranous system is entered；In the present invention, described reverse cleaning includes two levels：First level is between film group to realize that forward filter is inversely cleaned, and the present invention is arranged in cleaning module (cleaning pump and purge tank) behind N level membrane stacks, and during cleaning, cleanout fluid achieves the reverse cleaning between film group from back to front；Second level is to realize the cleanout fluid flowing contrary with filtration condition inside each film group.Liquid flow direction when liquid flow direction and cleaning when expecting are walked in present invention work extends film core service life, reduces cleaning energy consumption and the cleaning water yield conversely, improve Membrane cleaning efficiency, so as to reach efficiently, the purpose of energy-saving and environmental protection.
Description
Technical field
The present invention discloses a kind of forward direction and walks to expect reverse cleaning membrane system, divides by International Patent Classification (IPC) (IPC) and belongs to water
Process film separation system technical field.
Background technology
Membranous system install in membrane stack arrangement often from front to back, feed liquid sequentially pass through before and after membrane stack, from afterbody
Membrane stack discharging opening flows out, and in the course of work, with the flow direction of liquid, film surface can form the pollution of concentration polarization, i.e. film
Layer.Conventional membranous system cleaning when, cleanout fluid flow direction and walk direction of flow be consistent, i.e., washing and cleaning operation and walk expect
When, all it is to enter from the feed end of membranous system, flows out from the other end, two problems so occur：
1st, for membranous system, membrane stack is arranged from front to back, and pollution is also from light to weight, in cleaning process, cleanout fluid dense
Degree is then from thick to thin, so as to cause cleaning not thoroughly, greatly reduces film core service life；
2nd, for conventional membranous system, the direction of membrane component pollution is consistent with the direction of cleaning, and cleaning efficiency reduces, and effect is not
Good.
Chinese document CN1311055 discloses a kind of membrane separating method of two-way operation, is primarily adapted for use in hollow-fibre membrane, film
Component often worked after certain time, using the converting system of design, made the feed liquid reverse flow in membrane module, made membrance separation and clear
Work is washed while carrying out, and permeate flows to constant, the cleaning of aforementioned membrane module is that it is fixed to need during work using feed liquid reverse flow
When conversion flow direction；Chinese document CN95103432.4 discloses a kind of method for improving separation efficiency of ultra-filteration diaphragm, specifically hollow
Set up a reverse purging system that back flush can be carried out to face in the flow process of fibrous filter membrane separation or condensed matter；China
Document CN201310250776.4 discloses a kind of reverse-osmosis membrane element off-line cleaning method, and the method can be to reverse-osmosis membrane element
Clean, inversely wash by big yield, the operation such as forward direction is washed, soaked, multi-angle, multi-level offline strengthen single reverse osmosis membrane of cleaning
Element.However, it is in reverse membranous system with cleaning to be related to the material of walking to tandem membrane stack in aforementioned each document, because
This, just has the proposition of the present invention.
Content of the invention
For the deficiencies in the prior art, the invention provides a kind of forward direction walks to expect reverse cleaning membrane system, Membrane cleaning is improved
Efficiency, extends film core service life, reduces cleaning energy consumption and the cleaning water yield, so as to reach the purpose of efficient, energy-saving and environmental protection.
For reaching above-mentioned purpose, the present invention is achieved by the following technical solutions：
A kind of forward direction is walked and expects reverse cleaning membrane system, and which includes the N levels series connection membrane stack for arranging from front to back, wherein N >=1,
Each membrane stack is formed by connecting by a public pipe：
Material is filtered through relay step by step after membranous system is entered, and sequentially enters first order membrane stack, second level membrane stack ...
N level membrane stack deutostomas concentrated solution flows out；
Using reverse cleaning, which includes two levels to washing and cleaning operation：First level is just realized between membrane stack groups at different levels
Inversely clean to filtering；Second level is to realize the cleanout fluid flowing contrary with filtration condition inside each membrane stack group, clearly
Washing liquid is entered from N membrane stack groups discharging opening and is flowed out from charging aperture, and flows into N-1 level membrane stacks.
Further, arrange that cleaning module, the cleaning module include cleaning pump and purge tank behind N level membrane stacks, clean
When, cleanout fluid flows into N level membrane stacks, the 1st grade of membrane stack of N-1 levels membrane stack ... first and is cleaned, it is achieved that inverse between film group
To cleaning.
Further, in the M membrane stack groups, being achieved in that for reverse cleaning realized by the circulating pump of M+1 groups, leads to
Cross a short tube to be connected the circulating pump of M+1 groups with the discharging pipeline of M groups, and by M groups feeding pipe and public Guan Lian
Connect, skip the circulating pump of M groups, and switch valve is set accordingly, wherein M ＜ N are inversely cleaned in M membrane stack groups herein
Inversely clean in substantially each membrane stack group.
Further, for rolled membrane module, the feed pipe of membrane stacks at different levels is provided with circulation to the membrane stack that the membranous system is adopted
Pump and switching valve, discharge pipe are provided with switching valve, and the discharge pipe of afterbody membrane stack is provided with circulating pump and switching valve, and at this
CIP purge tanks and cleaning pump are provided with after group membrane stack, purge tank is connected to going out for afterbody membrane stack by cleaning pump and public pipe
Pipe material, membrane stacks at different levels make cleanout fluid enter into the cleaning of previous stage membrane stack by the switching valve of circulating pump and cooperation.
Further, each dialysis mouth of the membrane stack flow out after connecting, the pipeline of membrane stack dialysis solution at different levels is provided with feed liquid valve
V16 and purge valve V17, when membrane stack feed liquid is walked material or cleaned, two valves are alternately opened, and wherein membrane stack cleaning dialysis solution is returned through valve V17
Arrive purge tank.
Further, the membranous system feed end is provided with security personnel's pump and charging main valve V1, feed liquid concentrated solution warp after membrance separation
Valve V18 flows out.
Further, cleaning main valve V15 is provided with the cleaning pipeline of the purge tank after cleaning pump.
Difference between the present invention and existing scheme in function and structure：
Conventional clean is, forward direction walks material, positive cleaning, film face in the backward when expecting because walking, and pollutes more serious, is more difficult clearly
Wash, what cleaning performance is poor after positive cleaning, cause fouling membrane behind more more serious.
Cleaning program of the present invention, forward direction walk material, reverse cleaning, and are also reverse cleaning inside film, during cleaning, have just started clear
Lotion is denseer, the film core of cleaning pollution most serious, is greatly improved Membrane cleaning effect, improves film service life.
The present invention disclose a kind of forward direction and walks to expect reverse cleaning membrane system, and membranous system composition is main including arranging from front to back
N levels series connection membrane stack (N >=1), are coupled together by a public pipe, and material (water) is after membranous system is entered through relay step by step
Filter；In the present invention, described reverse cleaning includes two levels：First level is between film group to realize that forward filter is inversely clear
Wash, the present invention is arranged in cleaning module (cleaning pump and purge tank) behind N level membrane stacks, during cleaning, cleanout fluid is real from back to front
The reverse cleaning between film group is showed；Second level is inside each film group to realize the wash liquid stream contrary with filtration condition
Dynamic.Liquid flow direction when liquid flow direction and cleaning when expecting are walked in present invention work prolongs conversely, improve Membrane cleaning efficiency
Long film core service life, reduces cleaning energy consumption and the cleaning water yield, so as to reach the purpose of efficient, energy-saving and environmental protection.
Description of the drawings
Fig. 1 is schematic flow sheet of the present invention.
Fig. 2 is of the invention with existing cleaning membrane system comparison diagram.
Fig. 3 is of the invention with existing cleaning membrane system film interior contrast figure.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings：
Embodiment：Commonly used in the market for feed separation (purification or concentration) or the membrance separation of water filtration
System is the film separation system using multistage (group) series arrangement.The main N level strings for including arranging from front to back of membranous system composition
Connection membrane stack (N >=1), is coupled together by a public pipe.Material (water) is filtered through relay step by step after membranous system is entered, according to
Secondary entrance first order membrane stack, second level membrane stack ... N level membrane stack deutostomas concentrated solution flow out.
The present invention discloses the multistage film separation system that one kind can realize forward filter and reverse cleaning (regeneration).The present invention
In described reverse cleaning include two levels.
First level is between film group to realize that forward filter is inversely cleaned.The cleaning module of general film separation system is (clear
Wash pump and purge tank) it is arranged in before first order membrane stack, identical with when filtering during cleaning, cleanout fluid is introduced into first order film first
Heap, then gradually enters follow-up membrane stack.This patent is arranged in cleaning module (cleaning pump and purge tank) behind N level membrane stacks.
During cleaning, cleanout fluid flows into N level membrane stacks, the 1st grade of membrane stack of N-1 levels membrane stack ... first and is cleaned.Achieve between film group
Reverse cleaning.
Second level is inside each film group to realize that the cleanout fluid contrary with filtration condition flows, and cleanout fluid is from N
Membrane stack discharging opening is entered and is flowed out from charging aperture, and flows into N-1 level membrane stacks.Membrane stack cleaning liquid inside reverse flow is realized in the present invention
Not by a set of reverse pipeline is increased in membrane stack, mode realizes that such implementation pattern structure is excessively complicated, and due to knot
Structure complex fluid resistance is very big.The reverse circulating pump being achieved in that by M+1 groups for cleaning in M membrane stacks group in this patent
Realize, the circulating pump of M+1 groups is connected with the discharging pipeline of M groups by a short tube, and by M groups feeding pipe and public affairs
Condominium connects, and skips the circulating pump of M groups, and arranges switch valve accordingly, and wherein M ＜ N are inverse in M membrane stack groups herein
It is substantially in each membrane stack group to cleaning and inversely cleans.The advantage of this implementation is that pipeline structure is relatively easy, fluid resistance
Little, but need additionally to increase a cleaning pump.
In the present invention, M, N are natural numbers.
When liquid flow direction and cleaning when expecting are walked in present invention work, liquid flow direction is conversely, improve Membrane cleaning effect
Rate, extends film core service life, reduces cleaning energy consumption and the cleaning water yield, so as to reach the purpose of efficient, energy-saving and environmental protection.
Fig. 1 is referred to, a kind of forward direction is walked and expects reverse cleaning membrane system, including the N level membrane stacks for arranging from front to back, wherein N
＞ 1, when walking to expect, feed liquid forward flow sequentially enters first order membrane stack, second level membrane stack ... N level membrane stack deutostoma concentrated solution streams
Go out, the dialysis mouth of each membrane stack is simultaneously flowed out after connecting, the feed liquid of each membrane stack is to enter membrane stack from charging aperture to exit into from discharging opening
Next stage membrane stack；During cleaning, cleanout fluid backward flows into N level membrane stacks, the 1st grade of membrane stack of N-1 levels membrane stack ... and carries out clearly
Wash, the cleanout fluid of each membrane stack is to enter from charging aperture to exit into previous stage membrane stack, cleaning dialysis and concentration from membrane stack discharging opening
Liquid returns purge tank；For rolled membrane module, membrane separating process can be ultrafiltration, nanofiltration, or micro- to the membrane stack that membranous system is adopted
Filter.Circulating pump P002, switching valve V3, V4 is provided with the feed pipe of first order membrane stack, on the discharge pipe of first order membrane stack
It is provided with switching valve V5, V6, the feed pipe of membrane stacks at different levels is provided with circulating pump and switching valve, discharge pipe are provided with switching valve；Most
The discharge pipe of rear stage membrane stack is provided with circulating pump P004 and switching valve V11.V12, is provided with CIP purge tanks, clearly after last membrane stack
Cleaning of evaporator is connected to the discharge pipe of afterbody membrane stack by cleaning pump P006 and public pipe, and membrane stacks at different levels by circulating pump and are matched somebody with somebody
The switching valve of conjunction makes cleanout fluid enter into the cleaning of previous stage membrane stack.Feed liquid valve V16 is provided with the pipeline of membrane stack dialysis solution at different levels
And purge valve V17, when membrane stack feed liquid is walked material or cleaned, two valves are alternately opened, and wherein membrane stack cleaning dialysis solution is returned to through valve V17
CIP purge tanks.The membrane stack feed end be provided with security personnel pump P001 and charging main valve V1, feed liquid after membrance separation concentrated solution through valve
V18 flows out.Cleaning main valve V15 is provided with the cleaning pipeline of CIP purge tanks after cleaning pump.In feed end and first order membrane stack
The intermediate node of entrance returns to purge tank by the cleanout fluid that return duct is inversely cleaned each membrane stack, installs valve on the return line
Door V2.
Operation principle of the present invention is as follows：
When walking to expect, turn on pump P001, P002, P003, P004, valve V1, V4, V5, V7, V9, V11, V13, V18, other valves
Close, feed liquid forward flow, permeate is flowed out from V16, concentrated solution is flowed out from V18.
During cleaning, turn on pump P006, P005, P004, P003, P002, valve opening V2, V3, V6, V8, V10, V12, V14, V15,
V17 other valve closings, cleanout fluid enter after pump P006 from CIP purge tanks, inversely enter membrane stack and cleaned, and cleaning dialysis and concentrate
Liquid returns purge tank.
For membranous system, membrane stack is arranged from front to back, is polluted and from light to weight, as shown in Fig. 2 in cleaning process, existing
There is membranous system forward direction to walk the positive cleaning of material, the concentration of cleanout fluid is then that the high cleanout fluid of concentration is first gently polluted from thick to thin
Membrane component, be easily caused overclean and damage film core, and the low cleanout fluid of concentration finally just clean heavily contaminated membrane component,
Obviously cleaning is not thorough；And the present invention then forward direction walk material, reverse clean, solve cleanout fluid with the reverse matching problem of pollution.
As shown in figure 3, for the direction of pollution in existing conventional membranous system, membrane component is consistent with the direction of cleaning, cleaning
Efficiency reduces, and effect is bad.Fish scale is forward cleaned like fish scale to be impacted, and the reverse cleaning of the present invention just have can
Fish scale can be started the same, cleaning efficiency can be greatly improved.
The present invention can improve Membrane cleaning efficiency, extend film core service life, reduce cleaning energy consumption and the cleaning water yield, so as to
Reach the efficient, purpose of energy-saving and environmental protection.
Film group or membrane stack group is also referred to as in the present invention in membrane stack industry.Liquid flow direction and clear is walked when expecting in present invention work
Liquid flow direction when washing work is conversely, following arrow is illustrated.
Liquid flow direction during ← work cleaning
Liquid flow direction when expecting is walked in → work
Above described, only using the embodiment of this origination techniques content, any those skilled in the art use this wound
Make done modification, change, all belong to the scope of the claims of this creation opinion, and be not limited to those disclosed embodiments.
Claims (8)
1. a kind of forward direction is walked to expect reverse cleaning membrane system, it is characterised in that：Including the N levels series connection membrane stack for arranging from front to back, its
Middle N ＞ 1, each membrane stack are formed by connecting by a public pipe：
Material is filtered through relay step by step after membranous system is entered, and sequentially enters first order membrane stack, second level membrane stack ... N levels
After membrane stack, concentrated solution mouth flows out, and the feed liquid of each membrane stack is to enter membrane stack from charging aperture to exit into next stage film from concentrated solution mouth
Heap；
Using reverse cleaning, which includes two levels to washing and cleaning operation：First level is to realize positive mistake between membrane stack groups at different levels
Filter is reverse to clean；Second level is to realize the cleanout fluid flowing contrary with filtration condition, cleanout fluid inside each membrane stack group
Enter from N membrane stack group concentrated solutions mouth and flow out from charging aperture, and flow into N-1 level membrane stacks.
2. forward direction according to claim 1 is walked to expect reverse cleaning membrane system, it is characterised in that：Cloth behind the N level membrane stacks
Cleaning module is put, the cleaning module includes cleaning pump and purge tank, during cleaning, cleanout fluid flows into N level membrane stacks, N-1 first
Level the 1st grade of membrane stack of membrane stack ... is cleaned, it is achieved that the reverse cleaning between film group.
3. forward direction according to claim 1 is walked to expect reverse cleaning membrane system, it is characterised in that：Reverse clear in M membrane stack groups
Being achieved in that for washing realized by the circulating pump of M+1 groups, by a short tube by the circulating pump of M+1 groups and M groups
Discharging pipeline connection, and M groups feeding pipe is connected with public pipe, the circulating pump of M groups is skipped, and switching is set accordingly
Valve, wherein M ＜ N.
4. forward direction according to claim 1 is walked to expect reverse cleaning membrane system, it is characterised in that：The film that the membranous system is adopted
Heap is rolled membrane module, and the feed pipe of membrane stacks at different levels is provided with circulating pump and switching valve, discharge pipe are provided with switching valve, finally
The discharge pipe of one-level membrane stack is provided with circulating pump and switching valve, and is provided with CIP purge tanks and cleaning pump after this group of membrane stack, cleaning
Tank is connected to the discharge pipe of afterbody membrane stack by cleaning pump and public pipe, and membrane stacks at different levels are cut by circulating pump and cooperation
Changing valve makes cleanout fluid enter into the cleaning of previous stage membrane stack.
5. forward direction according to claim 1 and 2 is walked to expect reverse cleaning membrane system, it is characterised in that：The membrane stack each
Analyse liquid mouth and flow out after connecting, the pipeline of membrane stack dialysis solution at different levels is provided with feed liquid valve V16 and purge valve V17, and membrane stack feed liquid walks material
Or two valves are alternately opened during cleaning, wherein membrane stack cleaning dialysis solution returns to purge tank through valve V17.
6. forward direction according to claim 1 is walked to expect reverse cleaning membrane system, it is characterised in that：The membranous system feed end sets
There are security personnel's pump and charging main valve V1, feed liquid concentrated solution after membrance separation to flow out through valve V18.
7. the forward direction according to claim 2 or 4 is walked to expect reverse cleaning membrane system, it is characterised in that：The purge tank clear
Wash.
8. forward direction according to claim 5 is walked to expect reverse cleaning membrane system, it is characterised in that：The cleaning pipe of the purge tank
Cleaning main valve V15 is provided with road after cleaning pump.
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| CN201410717073.2A CN104437098B (en) | 2014-12-01 | 2014-12-01 | Forward direction is walked and expects reverse cleaning membrane system |
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| CN201410717073.2A CN104437098B (en) | 2014-12-01 | 2014-12-01 | Forward direction is walked and expects reverse cleaning membrane system |
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| CN107176708B (en) * | 2017-07-07 | 2021-01-26 | 蓝涛环保科技（南京）有限公司 | Method for separating cellulose ether residues from cellulose ether production wastewater |
| CN107469623A (en) * | 2017-09-25 | 2017-12-15 | 厦门市天泉鑫膜科技股份有限公司 | A kind of multifunctional membrane separates pilot experiment equipment |
| CN109133112A (en) * | 2018-10-30 | 2019-01-04 | 安徽峰可达科技股份有限公司 | A kind of technique and device of organic tubular membrane refined brine |
| CN111888942A (en) * | 2020-06-10 | 2020-11-06 | 北京首钢朗泽新能源科技有限公司 | Membrane cleaning system |
| CN113929193A (en) * | 2020-06-29 | 2022-01-14 | 佛山市顺德区美的饮水机制造有限公司 | Water purification structure and water purification unit |
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| CN101704594A (en) * | 2009-11-27 | 2010-05-12 | 波鹰(厦门)科技有限公司 | Device and method for purifying printing and dyeing advanced treatment wastewater |
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| JPH11277062A (en) * | 1998-03-30 | 1999-10-12 | Toray Ind Inc | Method and apparatus for producing purified water |
| CN100488608C (en) * | 2007-03-08 | 2009-05-20 | 上海交通大学 | Changing flow direction method for blocking reverse osmosis membrane scaling in the presence of the scale inhibitor |
| DE102008039676A1 (en) * | 2008-08-26 | 2010-03-04 | Inge Watertechnologies Ag | Device and method for backwashing filter membrane modules |
| CN202343107U (en) * | 2011-12-05 | 2012-07-25 | 深圳恒通源水处理科技有限公司 | Ultra-filtration membrane backwashing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101704594A (en) * | 2009-11-27 | 2010-05-12 | 波鹰(厦门)科技有限公司 | Device and method for purifying printing and dyeing advanced treatment wastewater |
| CN203196531U (en) * | 2012-12-21 | 2013-09-18 | 厦门市天泉鑫膜科技股份有限公司 | Continuous membrane separation system capable of filtering and cleaning part membrane stacks synchronously |
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