CN106621822A - Cleaning device and method for hollow fiber gas separation membrane module - Google Patents
Cleaning device and method for hollow fiber gas separation membrane module Download PDFInfo
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- CN106621822A CN106621822A CN201611231933.7A CN201611231933A CN106621822A CN 106621822 A CN106621822 A CN 106621822A CN 201611231933 A CN201611231933 A CN 201611231933A CN 106621822 A CN106621822 A CN 106621822A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
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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
- B01D65/10—Testing of membranes or membrane apparatus; Detecting or repairing leaks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
- B01D2273/18—Testing of filters, filter elements, sealings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
- B01D2273/20—High temperature filtration
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a cleaning device and method for a hollow fiber gas separation membrane module. The cleaning device is formed by the membrane module, a positive and negative bidirectional cleaning system, a ladder temperature purge system and an intermittent flow disturbance system. The positive and negative bidirectional cleaning system consists of a cleaning fluid tank, a cleaning pump, a pressure gauge, a positive and negative bidirectional cleaning pipeline and a blowoff valve. The ladder temperature purge system consists of an air compressor, a flowmeter, a control system, a heater, a purge pipeline and a blowoff valve. The intermittent flow disturbance system consists of an air compressor, a flowmeter, a control system, a disturbance gas flow generator, a check valve and a gas escape valve. The device disclosed by the invention can clean membrane modules in different pollution conditions; by a comprehensive cleaning effect of the intermittent flow disturbance system, the positive and negative bidirectional cleaning system and the ladder temperature purge system, performance of the membrane module is entirely repaired. The cleaning device and method are high in cleaning efficiency for the membrane module, good in effect, low in cost, simple in process and convenient to operate, and save enormous cost of replacing the membrane module.
Description
Technical field
The present invention relates to seperation film cleaning technique field, more particularly to a kind of Ho llow fiber membrane for gas separation component it is clear
Cleaning device and method.
Background technology
Membrane separation technique is an efficient, quick, new separation technology for energy-conservation, can adapt to wanting for contemporary new industry
Ask, therefore develop new and high technology that is relatively rapider and being considered as 21st century great development prospect.Gas separation membrane conduct
The important component part of membrane separation technique, is widely used at present air separation, hydrogen retrieval, natural gas removing sour gas
（H2S、CO2Deng）, organic vapor（VOCs）Multiple industry fields such as recovery and dehumidification of gas.According to seperation film industry " 12
Five " guide is developed, world's gas separation membrane market scale the year two thousand twenty is estimated can to rise to 7.6 hundred million dollars/year, domestic gaseous jet simulation
Market can reach 1,000,000,000 yuans with annual 30% increasing rate, films in 2015 and device sales volume.Hollow-fibre membrane by
In its specific surface area it is big, loading density is high, process is simple, without supporting layer and the features such as low production cost, become gas film point
Important branch in technology, is widely used in chemical industry, the field of environment protection such as coal, oil, synthesis ammonia, methyl alcohol, natural gas.
Ho llow fiber membrane for gas separation component（Also known as membrane separator）Requirement to unstripped gas is higher, is easily contaminated,
It is especially serious in the field pollution of the use conditions such as colliery, oil field difference.Performance has and significantly decays after membrane module is contaminated,
Normal production needs cannot be met, but the cost of the membrane module for more renewing is extremely expensive, the price of single membrane module can be arrived
It is first up to tens of thousands of or even hundreds of thousands.By scientific and effective reparation means most contaminated membrane module performances can be made to obtain greatly
Amplitude lifted, ensure that production is normally carried out by relatively low cost, thus to contaminated membrane module carry out clean reparation become
It is particularly important.
Current liquid separating film（Micro-filtration, ultrafiltration, nanofiltration and counter-infiltration）Cleaning repair formed the stream for comparing specification
Journey and standard, but due to gas separation membrane and material of preparing, membrane formation mechanism, separation principle, use condition, the guarantor of liquid separating film
Depositing mode and application etc. has basic difference, the cleaning agent of liquid film（Such as water etc.）For gas separation membrane is probably
Pollution source, accordingly, it would be desirable to study the cleaning method of suitable gas separation membrane, it is impossible to indiscriminately imitate liquid separating membrane module cleaning side
Method.Have at present and be standing and soak for cleaning part dtex and determine the method for gas separation membrane module, but be by ultrasonic cleaning, cleaning fluid on a small quantity
System, the gas separation membrane cleaning method of specification still belong to blank, therefore, it is necessary to study can be widely applied to various doughnut gas
The cleaning method of body separating film module.
In Chinese patent 201310597800.1, ultrasound will first be carried out by the polysulfones gas filtration film of dust and oily pollution
Ripple concussion cleaning, then the Chemical cleaning for carrying out sodium citrate after first sodium hypochlorite.Gas filtration film is three-dimensional netted in the patent
Polyster fibre thermocompression forming Jing after polysulfones macromolecule foaming plastics stiffeningization is formed, and filter material surface has 5-8 micron uniform pores.Should
Gas filtration film is not proper gas separation membrane and more like microfiltration membranes（Filter medium is changed into air from liquid）, because
For the gas filtration film separated by micropore screening principle, and gas separation membrane surface truly is uniform cause
It is close non-porous, separated by dissolving-diffusion mechanism.In Chinese patent 200510103122.4, for liquid separating film
Cleaning, producing compressed gas using air compressor makes pulse valve periodically be opened and closed, and produces periodically pulsing high pressure draught, right
Current in backwash inlet pipeline provide a high voltage pulse air-flow, make backwash water become pulse aerated flow by even stream
Anti- cleaning operation is carried out to film.
There are obvious technical disadvantages in the cleaning device and method in above-mentioned patent：1st, gas separation membrane major part is by supporting
The composite membrane that layer and functional layer are combined to form by physical absorption, is cleaned using ultrasonic oscillation or high pressure draught（Especially backwash）Can
Can the combination that can destroy between supporting layer and functional layer, cause the stripping of two-layer, or even membrane module is scrapped.2nd, due to hollow fibre
The loading density of dimension gas separation membrane module is big, film silk diameter is little, the relatively capillary effect of closing, film silk inside membrane module
Answer and the swelling absorption of membrane material makes remaining substantial amounts of cleaning agent in the membrane module after cleaning, sodium hypochlorite and sodium citrate are clear
Solid can be separated out after the volatilization of lotion equal solvent, secondary pollution is caused to gas separation membrane module, reduce gas separation membrane module
Cleaning efficiency and effect.3rd, due to the material of preparing of gas separation membrane and liquid separating film, membrane formation mechanism, separation principle, make
There are the characteristics such as basic difference, size, the intensity of most of gas separation membrane silk with condition, preserving type and application etc.
Differ larger with liquid separating film, above-mentioned patent middle arteries pressure gas stream of leaping high is likely to cause film silk to occur with fluid sealant junction
Fracture（Film silk most fragile herein）, the destruction of membrane module unrepairable is caused, even result in scrapping for membrane module.Therefore, gas
Separate in membrane cleaning process has strict requirements to producing the size of bubble, producing flow perturbation intensity etc..4th, gas separation membrane
Component require in use film silk be dried, cleaning, in above-mentioned patent cleaning method can in membrane module remaining cleaning fluid,
Cleaning fluid impurity is introduced during use, affects to separate product quality.
The content of the invention
For the limitation for cleaning Ho llow fiber membrane for gas separation assembly method in prior art, the invention provides a kind of
Ho llow fiber membrane for gas separation component cleaning device and method.
Technical solution of the present invention is as follows：A kind of Ho llow fiber membrane for gas separation component cleaning device, it is characterised in that：Including
Ho llow fiber membrane for gas separation component, positive and negative two-way purging system, step temperature purging system and intermittent air flow perturbed system.
The Ho llow fiber membrane for gas separation component raw material gas port, residual air mouth and two infiltration gas ports are oozed respectively by screw thread and positive backwash
Pipeline connects；The two-way purging system is by cleaning fluid tank, cleaning pump, pressure gauge, positive backwash pipeline and exhaust-valve one, exhaust-valve
Two compositions, cleaning fluid water influent pipeline is branched off into two-way after cleaning pump and pressure gauge through threeway, then by screw thread respectively with film
The infiltration gas port one of component raw material gas port and side connects, and membrane module oozes residual air mouth and the infiltration gas port two of opposite side passes through screw thread
Connect with pipeline and synthesized by threeway and formed all the way cleaning fluid liquid back pipe road；The step temperature purging system is by air compressor machine, stream
Gauge, control system, heater, scavenging pipeline and exhaust-valve two are constituted；The intermittent air flow perturbed system is by air compressor machine, flow
Meter, control system, rough air generator, check (non-return) valve and vent valve composition.The step temperature purging and intermittent air flow disturbance
System pipeline is branching into two-way after air compressor machine, flowmeter and control system by threeway, after leading up to heater, valve
It is connected with membrane module raw material gas port pipeline by threeway, forms step temperature purging system；Separately lead up to rough air generator,
Residual air mouth pipeline is oozed after valve by threeway and membrane module to be connected, form intermittent air flow perturbed system.
The control system includes temperature control, flow control and interval start and stop element, it is possible to achieve to gas flow, temperature
The precise control of degree and chopper frequency.
The heater is the heat exchangers such as electric heating cover, thermal medium heat exchanger.
The rough air generator is different size particle sintered plate, pulse valve or pin type air bubble generator etc..
A kind of described Ho llow fiber membrane for gas separation component cleaning device cleaning hollow fiber gas membrane module（Or film point
From device）Method, it is characterised in that：Methods described specifically includes following steps：
（1）, determine the material of Ho llow fiber membrane for gas separation component, contaminated gas film assembly property is tested, and
With the initial performance of membrane module（Dispatch from the factory performance）It is compared；
（2）, cleaning fluid pumped into membrane module by positive and negative two-way purging system, being standing and soak for certain hour makes cleaning fluid abundant
Infiltration, swelling and dissolved contaminants, then blast air pulse, in cleaning fluid is soaked into by intermittent air flow perturbed system
Film silk table face forms flow perturbation, so that pollutant departs from film silk table face.Cleaning fluid is discharged from exhaust-valve after the completion of cleaning；
（3）, cleaning fluid positive and negative Bidirectional-pressure cleaning is carried out respectively by positive and negative two-way purging system, after the completion of cleaning will cleaning
Liquid is discharged from exhaust-valve；
（4）, according to control system set parameter, progressively purged from low to high by step temperature purging system temperature,
Further remove residual contaminants and cleaning agent.The main cleaning agent and pollutant for removing most of residual of low temperature purging, prevents
Cleaning reagent assembles the danger for causing due to high temperature and in membrane module, and high-temperature blowing can be to remaining cleaning agent and organic dirt
Dye thing etc. carries out Pintsch process and fully erased, and the performance for making hollow fiber gas membrane module is thoroughly repaired.
（5）, to cleaning and purging clean hollow fiber gas membrane module carry out performance test, it is and initial with membrane module
Performance（Dispatch from the factory performance）It is compared.
The Ho llow fiber membrane for gas separation component can be inner pressed or external-compression type, and the material of membrane module includes polysulfones
（PSF）, polyether sulfone (PES), polyimides (PI), PEI (PEI), polyphenylene oxide (PPO) Polymer material.
The cleaning fluid is standing and soak for the time for 2-20 hours.
Rough air stop frequency is 2-30 beat/min in the control system, and the start and stop time is identical, disturbance gas
The flow of stream is 5-20 m3/h, and scavenging period is 0.5-4 hours.
The positive and negative Bidirectional-pressure scavenging period is 0.5-4 hours, and cleaning pressure is 0.05-0.2MPa.
The step temperature purging air flow 30-120m3/ h, purging temperature is respectively 40-120oC, purge time difference
For 1-4 hours.
Due to the enforcement of above technical scheme, the present invention has following distinguishing feature and advantage compared to prior art：
1st, injected into membrane module with cleaning pump and be standing and soak for after cleaning fluid and fine gas is blasted by intermittent air flow perturbed system
Bubble, the film silk table face in immersion cleaning fluid forms flow perturbation, so that pollutant departs from film silk table face；2nd, by positive and negative
Cleaning fluid is carried out respectively forward direction, reversely pressurization cleaning to hollow fiber film assembly by two-way purging system, is quickly cut in cleaning fluid
Pollutant is set to depart from film silk table face under shear force effect.3rd, the membrane module after cleaning is through step temperature purging system temperature by low
Progressively purged to height, the main cleaning agent and pollutant for removing most of residual of low temperature purging, prevent cleaning reagent due to
High temperature and assemble the danger for causing in membrane module, high-temperature blowing can carry out height to remaining cleaning agent and organic pollution etc.
Anneal crack solution is simultaneously fully erased, and the performance for making hollow fiber gas membrane module is thoroughly repaired.4th, during the present invention can be effectively improved
The cleaning performance and efficiency of hollow fiber gas membrane module, shortens scavenging period, reduces cleaning cost, while process is simple, operation
It is convenient, can be widely applied to various hollow fiber gas membrane module cleanings.
The present invention relates to a kind of Ho llow fiber membrane for gas separation component cleaning device and method, equipment investment is little, operation dimension
Shield low cost, can be directed to the different membrane module of pollution situation and be cleaned, by being standing and soak for flow perturbation system, positive,
Reversely pressurization cleaning and step temperature purging, improve cleaning performance and efficiency, shorten scavenging period, and the performance for making membrane module is obtained
Repair comprehensively, extend the service life of membrane module, save the huge cost for changing membrane module.
Description of the drawings
Fig. 1 is the structural representation of apparatus of the present invention.
In Fig. 1：1. cleaning fluid tank；2. cleaning pump；3. pressure gauge；4. exhaust-valve one；5. exhaust-valve two；6. hollow fibre
Dimension gas separation membrane module；7. air compressor machine；8. flowmeter；9. control system；10. heater；11. vent valves；12. disturb
Take offence flow-generator；13. check (non-return) valves；14. valves one；15. valves two；16. valves three；17. valves four；18. valves five；19.
Valve six；20. valves seven；21. raw material gas ports；22. ooze residual air mouth；23. infiltration gas ports one；24. infiltration gas ports two.
Specific embodiment
With reference to the accompanying drawings and detailed description the present invention is further described.
As shown in figure 1, the invention discloses a kind of Ho llow fiber membrane for gas separation component cleaning device, including doughnut
Gas separation membrane module 6, positive and negative two-way purging system, step temperature purging system and intermittent air flow perturbed system, it is described in
Hollow fiber gas separation membrane module raw material gas port 21, ooze residual air mouth 22, infiltration gas port 1, infiltration gas port 2 24 respectively pass through spiral shell
Line is connected with positive backwash pipeline；The two-way purging system is by cleaning fluid tank 1, cleaning pump 2, pressure gauge 3, positive backwash pipeline and row
Empty valve 1, exhaust-valve 25 are constituted, and cleaning fluid water influent pipeline is branched off into two-way after cleaning pump 2 and pressure gauge 3 through threeway, then
It is connected with the infiltration gas port 1 of membrane module unstripped gas 21 and side respectively by screw thread, membrane module oozes residual air mouth 22 and opposite side
Infiltration gas port 24 connected with pipeline by screw thread and synthesized by threeway and formed all the way cleaning fluid liquid back pipe road；The step temperature
Purging system is made up of air compressor machine 7, flowmeter 8, control system 9, heater 10, scavenging pipeline and exhaust-valve 1；The interval
Flow perturbation system is by 11 groups of air compressor machine 7, flowmeter 8, control system 9, rough air generator 12, check (non-return) valve 13 and vent valve
Into, step temperature purging and intermittent air flow perturbed system pipeline after air compressor machine 7, flowmeter 8 and control system 9 by
Threeway branches into two-way, leads up to and be connected with the pipeline of membrane module raw material gas port 21 by threeway after heater 10, forms step temperature
Degree purging system；Separately lead up to and the pipeline of residual air mouth 22 is oozed by threeway and membrane module after rough air generator 12 be connected, formed
Intermittent air flow perturbed system.
Its operation principle is：Determine the material of Ho llow fiber membrane for gas separation component, membrane module initial performance is surveyed
Examination.By cleaning fluid tank 1, cleaning pump 2, valve 3 16, valve 4 17 are opened, forward direction is squeezed into after cleaning fluid and closes valve, then
Valve 5 18, valve 6 19 are opened, is reversely squeezed into and valve is closed after cleaning fluid, check (non-return) valve 13 prevents cleaning fluid from entering flow perturbation
System pipeline.After being standing and soak for a period of time, by air compressor machine 7, control system 9, rough air generator 12, valve seven is opened
20 are passed through intermittent air flow disturbance cleaning, and air pulse is discharged from upper end atmospheric valve 11, after the completion of intermittent air flow disturbance cleaning, open
Exhaust-valve 4 excludes cleaning fluid.Cleaning fluid opens valve 3 16, valve 4 17 and reverse cleaning system by positive purging system,
Opening valve 5 18, valve 6 19 carries out respectively pressurization cleaning, by cleaning fluid respectively from exhaust-valve 1, emptying after the completion of cleaning
Valve 25 is discharged.Setting control system parameter, opens valve 1, valve 2 15, and by step temperature from low to high film group is purged
Part, thoroughly removes residual contaminants and cleaning agent, and purge gass are emptied from exhaust-valve 4.To the hollow fiber gas film group cleaned
Part carries out performance test, and with the initial performance of membrane module（Dispatch from the factory performance）It is compared.
Embodiment 1
With the method for cleaning Ho llow fiber membrane for gas separation component disclosed by the invention, cleaning polysulfone hollow fibre gas is separated
Membrane module, tests membrane module initial performance, pumps into cleaning fluid and is standing and soak for the time for 6 hours, air-flow in control system
Stop frequency is 10 beats/min, and the flow of rough air is 10 m3/ h, rough air is cleaned 1 hour, and positive and negative Bidirectional-pressure is clear
The time is washed for 1 hour, cleaning pressure is 0.1MPa, step temperature purge flow rate 50m3/ h, purging temperature is respectively 60,80,100
DEG C, purge time is respectively 2,2,1 hour.According to the same batch of aforesaid concrete operations cleaning process, pollution level it is close three
Root membrane module is respectively component 1-3, and cleaning is tested membrane module performance after terminating, as a result referring to table 1.
Embodiment 2
With the method for cleaning Ho llow fiber membrane for gas separation component disclosed by the invention, polysulfones is cleaned（PSF）Doughnut gas
Body separating film module, tests membrane module initial performance, pumps into cleaning fluid and is standing and soak for the time for 6 hours, control system
Middle air-flow stop frequency is 15 beats/min, and the flow of rough air is 20 m3/ h, rough air is cleaned 2 hours, positive and negative two-way
Pressurization scavenging period is 1 hour, and cleaning pressure is 0.1MPa, step temperature purge flow rate 50m3/ h, purging temperature is respectively 60,
80、100oC, purge time is respectively 2,2,1 hour.According to the same batch of aforesaid concrete operations cleaning process, pollution level phase
Three near membrane modules are respectively component 4-6, and cleaning is tested membrane module performance after terminating, as a result referring to table 1.
Comparative example 1
With the method for cast hollow fiber film assembly disclosed by the invention, soaked 2 days using cleaning fluid, do not adopt air pulse
Perturbed system, remaining condition is identical with embodiment 1 and embodiment 2.According to aforesaid concrete operations flow process be respectively washed same batch,
Three close membrane modules of pollution level, respectively component 7-9, cleaning is tested membrane module performance after terminating, and is as a result joined
It is shown in Table 1.
The membrane module cleaning situation contrast of the embodiment 1,2 of table 1 and comparative example 1
As it can be seen from table 1 after using intermittent air flow perturbed system rinsing membrane module, the performance of membrane module is by initial performance
50% or so is lifted to more than 90%, and the performance of the membrane module for being standing and soak for processing using cleaning fluid is by 50% or so of initial performance
Lifted to 70% or so.Intermittent air flow perturbed system can effectively remove the pollutant in membrane removal silk table face, and the repair rate for making membrane module is carried
It is high by more than 20%, it is fully achieved and uses standard.
Embodiment 3
With the method for cleaning Ho llow fiber membrane for gas separation component disclosed by the invention, polyimide hollow fiber gas is cleaned
Separating film module, tests membrane module initial performance, pumps into cleaning fluid and is standing and soak for the time for 10 hours, in control system
Air-flow stop frequency is 10 beats/min, and the flow of rough air is 15 m3/ h, rough air is cleaned 1.5 hours, positive pressurization
Scavenging period is 3 hours, and reversely pressurization scavenging period is 1 hour, and cleaning pressure is 0.1MPa, step temperature purge flow rate
70m3/ h, purging temperature is respectively 60,90,120 DEG C, and purge time is respectively 2,1,2 hours.According to aforesaid concrete operations stream
Close three membrane modules (component 1-3) of the same batches of Cheng Qingxi, pollution level carry out parallel laboratory test, clean after terminating to film group
Part performance is tested, as a result referring to table 2.
Embodiment 4
With the method for cleaning Ho llow fiber membrane for gas separation component disclosed by the invention, polyimide hollow fiber gas is cleaned
Separating film module, tests membrane module initial performance, pumps into cleaning fluid and is standing and soak for the time for 10 hours, in control system
Air-flow stop frequency is 10 beats/min, and the flow of rough air is 15 m3/ h, rough air is cleaned 1.5 hours, positive pressurization
Scavenging period is 2 hours, and reversely pressurization scavenging period is 1.5 hours, and cleaning pressure is 0.15MPa, step temperature purge flow rate
70m3/ h, purging temperature is respectively 60,90,120 DEG C, and purge time is respectively 2,1,2 hours.According to aforesaid concrete operations stream
Close three membrane modules (component 4-6) of the same batches of Cheng Qingxi, pollution level carry out parallel laboratory test, clean after terminating to film group
Part performance is tested, as a result referring to table 2.
Comparative example 2
With the method for cast hollow fiber film assembly disclosed by the invention, positive and negative Bidirectional-pressure is not adopted to clean, remaining condition
It is identical with embodiment 3 and embodiment 4.Close three of same batch, pollution level are respectively washed according to aforesaid concrete operations flow process
Root membrane module, respectively component 7-9, cleaning is tested membrane module performance after terminating, as a result referring to table 2.
The membrane module cleaning situation contrast of the embodiment 3,4 of table 2 and comparative example 2
From table 2 it can be seen that using positive and negative Bidirectional-pressure purging system rinsing membrane module compared with the system is not adopted, membrane module
Repair rate improve more than 20%, the performance for making membrane module returns to more than 80% by 13% or so of initial value, effectively removes
The pollutant in film silk table face, improves cleaning efficiency.
Embodiment 5
With the method for cleaning Ho llow fiber membrane for gas separation component disclosed by the invention, polyimide hollow fiber gas is cleaned
Separating film module, tests membrane module initial performance, pumps into cleaning fluid and is standing and soak for the time for 12 hours, in control system
Air-flow stop frequency is 6 beats/min, and the flow of rough air is 15 m3/ h, rough air is cleaned 1 hour, positive pressurization cleaning
Time is 2 hours, and reversely pressurization scavenging period is 1 hour, and cleaning pressure is 0.1MPa, step temperature purge flow rate 100m3/ h,
Purging temperature is respectively 60,90,120 DEG C, and purge time is respectively 2,3,2 hours.According to aforesaid concrete operations cleaning process
Close three membrane modules (component 1-3) of same batch, pollution level carry out parallel laboratory test, clean after terminating to membrane module performance
Tested, as a result referring to table 3.
Embodiment 6
With the method for cleaning Ho llow fiber membrane for gas separation component disclosed by the invention, polyimide hollow fiber gas is cleaned
Separating film module, tests membrane module initial performance, pumps into cleaning fluid and is standing and soak for the time for 12 hours, in control system
Air-flow stop frequency is 6 beats/min, and the flow of rough air is 15 m3/ h, rough air is cleaned 1 hour, positive pressurization cleaning
Time is 2 hours, and reversely pressurization scavenging period is 1 hour, and cleaning pressure is 0.1MPa, step temperature purge flow rate 80m3/ h,
Purging temperature is respectively 80,95,115 DEG C, and purge time is respectively 3,2,2 hours.According to aforesaid concrete operations cleaning process
Close three membrane modules (component 4-6) of same batch, pollution level carry out parallel laboratory test, clean after terminating to membrane module performance
Tested, as a result referring to table 3.
Comparative example 3
With the method for cast hollow fiber film assembly disclosed by the invention, purged 5 hours using normal temperature, do not adopt step temperature
Purging system, remaining condition is identical with embodiment 5 and embodiment 6.According to aforesaid concrete operations flow process be respectively washed same batch,
Three close membrane modules of pollution level, respectively component 7-9, cleaning is tested membrane module performance after terminating, and is as a result joined
It is shown in Table 3.
The membrane module cleaning situation contrast of the embodiment 5,6 of table 3 and comparative example 3
From table 3 it can be seen that using step temperature purging system the cleaning agent of remnants can be removed and under the conditions of high-temperature blowing
Organic pollution is cracked, compared with the system is not adopted, the repair rate of membrane module improves more than 30%, make the property of membrane module
More than 80% can be returned to by 10% or so of initial value, obtain good cleaning performance, be fully achieved and use standard.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, technology according to the present invention scheme and its
Inventive concept equivalent or change in addition, all should be included within the scope of the present invention.
Claims (10)
1. a kind of Ho llow fiber membrane for gas separation component cleaning device, it is characterised in that：Including Ho llow fiber membrane for gas separation group
Part, positive and negative two-way purging system, step temperature purging system and intermittent air flow perturbed system, the hollow fiber gas are separated
Membrane module raw material gas port, ooze residual air mouth, infiltration gas port one, infiltration gas port two be connected with positive backwash pipeline by screw thread respectively；Institute
State two-way purging system to be made up of cleaning fluid tank, cleaning pump, pressure gauge, positive backwash pipeline and exhaust-valve one, exhaust-valve two, clean
Liquid water influent pipeline is branched off into two-way after cleaning pump and pressure gauge through threeway, then by screw thread respectively with membrane module raw material gas port
Connect with the infiltration gas port one of side, membrane module oozes residual air mouth and the infiltration gas port two of opposite side is connected simultaneously by screw thread with pipeline
Synthesized by threeway and formed all the way cleaning fluid liquid back pipe road；The step temperature purging system is by air compressor machine, flowmeter, control system
System, heater, scavenging pipeline and exhaust-valve one are constituted；The intermittent air flow perturbed system is by air compressor machine, flowmeter, control system
System, rough air generator, check (non-return) valve and vent valve composition, the step temperature purging and intermittent air flow perturbed system pipeline exist
Two-way is branched into by threeway after air compressor machine, flowmeter and control system, is led up to after heater by threeway and membrane module
Raw material gas port pipeline is connected, and forms step temperature purging system；Separately lead up to after rough air generator by threeway and film group
Part oozes residual air mouth pipeline and is connected, and forms intermittent air flow perturbed system.
2. a kind of Ho llow fiber membrane for gas separation component cleaning device according to claim 1, it is characterised in that：The control
System processed includes temperature control, flow control and interval start and stop element, it is possible to achieve to gas flow, temperature and chopper frequency
Precise control.
3. a kind of Ho llow fiber membrane for gas separation component cleaning device according to claim 1, it is characterised in that：It is described to add
Hot device is the heat exchangers such as electric heating cover, thermal medium heat exchanger.
4. a kind of Ho llow fiber membrane for gas separation component cleaning device according to claim 1, it is characterised in that：It is described to disturb
Flow-generator of taking offence is different size particle sintered plate, pulse valve or pin type air bubble generator.
5. with a kind of Ho llow fiber membrane for gas separation component cleaning device rinsing membrane module described in any one of claim 1-4
Method, it is characterised in that：Methods described specifically includes following steps：
（1）Determine the material of Ho llow fiber membrane for gas separation component, contaminated gas film assembly property is tested, and with
The initial performance of membrane module is compared；
（2）Cleaning fluid is pumped into membrane module by positive and negative two-way purging system, being standing and soak for certain hour makes cleaning fluid fully soak
Profit, swelling and dissolved contaminants, then blast air pulse, the film in cleaning fluid is soaked into by intermittent air flow perturbed system
Silk table face forms flow perturbation, so that pollutant departs from film silk table face, discharges cleaning fluid from exhaust-valve after the completion of cleaning；
（3）Positive and negative Bidirectional-pressure cleaning is carried out respectively to the membrane module for polluting by positive and negative two-way purging system, cleaning is completed
Cleaning fluid is discharged from exhaust-valve afterwards；
（4）According to the parameter that control system sets, progressively purged from low to high by step temperature purging system temperature, entered
One step removes residual contaminants and cleaning agent.
6. the method for rinsing membrane module according to claim 5, it is characterised in that：The step（1）Middle doughnut gas
Body separating film module is inner pressed or external-compression type, the material of membrane module include polysulfones, polyether sulfone, polyimides, PEI,
Polyphenylene oxide macromolecular material.
7. the method for rinsing membrane module according to claim 5, it is characterised in that：The step（2）Middle cleaning fluid stands
Soak time is 2-20 hours.
8. the method for rinsing membrane module according to claim 5, it is characterised in that：The step（2）In middle control system
Rough air stop frequency is 2-30 beat/min, and the start and stop time is identical, and the flow of rough air is 5-20 m3/ h, clearly
The time is washed for 0.5-4 hours.
9. the method for rinsing membrane module according to claim 5, it is characterised in that：The step（3）In it is positive and negative it is two-way plus
Pressure scavenging period is respectively 0.5-4 hours, and cleaning pressure is 0.05-0.2MPa.
It is 10. according to claim 5 to clean Ho llow fiber membrane for gas separation assembly method, it is characterised in that：The step
（4）Middle step temperature purging air flow 30-120m3/ h, purging temperature be respectively 40-120 DEG C, purge time be respectively 1-4
Hour.
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