CN207576141U - Nanofiltration membrane process system for deep recovery of waste alkali liquor - Google Patents
Nanofiltration membrane process system for deep recovery of waste alkali liquor Download PDFInfo
- Publication number
- CN207576141U CN207576141U CN201721552744.XU CN201721552744U CN207576141U CN 207576141 U CN207576141 U CN 207576141U CN 201721552744 U CN201721552744 U CN 201721552744U CN 207576141 U CN207576141 U CN 207576141U
- Authority
- CN
- China
- Prior art keywords
- waste liquid
- membrane
- pipe
- tank
- nano filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012528 membrane Substances 0.000 title claims abstract description 62
- 239000002699 waste material Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000001728 nano-filtration Methods 0.000 title abstract description 10
- 239000003513 alkali Substances 0.000 title abstract description 7
- 238000011084 recovery Methods 0.000 title description 4
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims description 20
- 238000007599 discharging Methods 0.000 claims description 12
- 239000000706 filtrate Substances 0.000 claims description 12
- 239000000047 product Substances 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 10
- 238000010926 purge Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000000835 fiber Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000011347 resin Substances 0.000 abstract description 6
- 239000012141 concentrate Substances 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 41
- 238000005096 rolling process Methods 0.000 description 10
- 229920002488 Hemicellulose Polymers 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000011070 membrane recovery Methods 0.000 description 4
- 229920000297 Rayon Polymers 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011017 operating method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011045 prefiltration Methods 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000005374 membrane filtration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model discloses a receive filter membrane process systems that waste alkali lye degree of depth was retrieved, including the waste liquid jar that connects gradually, receive filter membrane device and filtrating jar, connect the waste liquid jar and receive and set gradually the material pump on the pipeline between the filter membrane device, the security personnel filter, high-pressure pump and circulating pump, the clear solution export of filter membrane device is received in the filtrating jar connection, receive and establish the waste liquid delivery pipe on filter membrane device's the concentrate export, establish the concentrated back flow of connecting the waste liquid jar on the waste liquid delivery pipe, establish concentrated reflux valve on the concentrated back flow, be located and establish the circulating pipe on the waste liquid delivery pipe of concentrated reflux valve front end, the circulating pipe communicates on the pipeline between high-pressure pump and. During the operation, the flow setting of accessible concentration reflux valve and circulating pipe guarantees that the flow that gets into the nanofiltration membrane device per hour can increase than current device to realize that increase rete erodees the volume, reduce the stay probability of appearing impurity such as semi-fibre, resin, divalent ion complex, improve nanofiltration membrane device's life.
Description
Technical field
The utility model is a kind of NF membrane process system of spent lye depth recycling, and in particular to using NF membrane to useless
The process system that lye is recycled belongs to the field of waste liquid treatment of the industries such as viscose rayon production, papermaking.
Background technology
It is required for carrying out pulp impregnation in viscose rayon production and paper industry, and the method handled, that is, it uses
Certain density sodium hydroxide at a certain temperature inside pulp hemicellulose, resin, ash content be dissolved in lye and pass through
The mode of squeezing removes.However hemicellulose, resin, ash content equal size will gradually rise these lye after repeated use, when
Reach certain concentration（The black liquor being industrially commonly called as）After cannot reuse.Industrially, some enterprises are using direct
The mode of environmental protection treatment is drained into, and most of enterprise carries out environmental protection treatment again after then being recycled to black liquor.
At present, in black liquor recovery system, the rolling NF membrane that uses of the country is recycled, existing nanofiltration system and
Salkali waste can only be recycled 72 ~ 75% by the NF membrane core of use.It is by NF membrane recovery process system as shown in Figure 1 it is recognised that useless
Alkali is pumped into cartridge filter by material, flows into high-pressure pump laggard to 6 membrane tubes in parallel of boosting, passes through the rolling in membrane tube
After the filtering of NF membrane core, waste liquid returns to waste liquid tank by concentrating return-flow, and filter liquor is collected into filtrate tank by central tube, when reaching
During the rate of recovery, the hemicellulose in one side waste liquid will partly be precipitated and rolling NF membrane film core runner very little, easily stifled
It fills in film layer, the solidity object content increase in another aspect waste liquid causes lye viscosity to increase, and pressure difference also gradually increases during operation,
To the well damage of film core, cause not continuing to be recycled waste liquid in production.
In the prior art, the service life for raising rolling NF membrane, needs periodically to clean rolling NF membrane, example
Such as, existing patent document CN106178963A（A kind of rolling NF membrane cleaning method, 2016.12.07）Record, first with except
Brine is pumped into all mold cores of rolling NF membrane group, after the salkali waste push-in concentration tank in mold core, then again by being pumped into desalination
The opening and closing of the water valve at every membrane tube both ends of water and control rolling NF membrane group carries out wash cycles to membrane tube by root.This method is one
Determine to avoid the stopping state of rolling NF membrane film core in degree, extend the service life of film core, but can not fundamentally carry
The recovery processing efficiency of high spent lye.
In addition to aforesaid operations, existing patent document CN20349818U（Recycle spent acid salkali waste system, 2014.03.26）
Disclose a kind of recycling being made of pre-filtration system, circulating tank, cartridge filter, force (forcing) pump, nanofiltration membrane system, dialysis liquid pipe
The process system of spent acid alkali.In use, the resin of the partial crushing in spent acid, lye can be removed by pre-filtration system, suspended
Object and absorbed portion albumen mitigate the load of subsequent nano-filtration membrane filtration, protect membrane component.
Utility model content
The purpose of this utility model is to provide a kind of NF membrane process system of spent lye depth recycling, by nanofiltration
Film device front end sets circulating pump, before a concentrate part for nano filter membrance device is back to nano filter membrance device using circulation pipe
End, during operation, can by the flow set of concentrating return-flow valve and circulation pipe, ensure per hour into the flow of nano filter membrance device compared with
Existing apparatus is increased, and so as to fulfill increase film layer erosion quantity, reduces precipitation hemicellulose, resin, divalent ion complex compound etc.
The stop probability of impurity improves the service life of nano filter membrance device.
The utility model is achieved through the following technical solutions：A kind of NF membrane process system of spent lye depth recycling, packet
Sequentially connected waste liquid tank, nano filter membrance device and filtrate tank are included, is connected on the pipeline between waste liquid tank and nano filter membrance device successively
Product pump, cartridge filter, high-pressure pump and circulating pump are provided with, filtrate tank connects the purified liquor outlet of nano filter membrance device, nanofiltration
Discharging of waste liquid pipe is set on the concentrated solution outlet of film device, the concentrating return-flow pipe of discharging of waste liquid Guan Shangshe connection waste liquid tanks concentrates back
Concentrating return-flow valve is set in flow tube, the discharging of waste liquid Guan Shangshe circulation pipes positioned at concentrating return-flow valve front end, circulation pipe is communicated in high pressure
On pipeline between pump and circulating pump.
The nano filter membrance device includes 8 membrane tubes being arranged in parallel, and 3 mold cores are sequentially connected in series in every membrane tube.
The mold core film layer runner of the nano filter membrance device is 1.4mm.
Cleaning device is further included, the cleaning device includes the purge tank being set between waste liquid tank and product pump, NF membrane
The cleaning raw material return duct of the discharging of waste liquid Guan Shangshe connection purge tanks of device, the purified liquor outlet of nano filter membrance device and filtrate tank
Cleaning net liquid return duct is set in connecting pipe.
Heating unit or heat exchange jacket are set on the waste liquid tank.
The utility model compared with prior art, has the following advantages and advantageous effect：
（1）In existing nanofiltration membrane system, the concentrate after waste liquid is filtered by nano filter membrance device is directly back to waste liquid tank
In, the flow that waste liquid enters nano filter membrance device is generally fixed for 25 m3/ h, the utility model is in the front end of existing nano filter membrance device
Circulating pump is added, a concentrate part for nano filter membrance device is back to nano filter membrance device front end using circulation pipe, the structure
Setting can improve the flow that existing waste liquid enters nano filter membrance device, ensure that the amount for flowing through film layer per hour is more than 75m3/ h, compared with
The fixation 25m of original system3/ h increases 3 times, so as to fulfill increase film layer erosion quantity, reduce precipitation hemicellulose, resin, two
The stop probability of the impurity such as valency ionic complex improves the service life of nano filter membrance device.
（2）In existing nanofiltration membrane system, it is set up in parallel using 6 NF membrane membrane tubes, 4 formworks is sequentially connected in series in every membrane tube
Core, it has been proved by practice that waste liquid is sequentially entered during mold core is filtered, in waste liquid the impurity contents such as half fiber it is gradual
Accumulation, the pressure that last branch mold core in every membrane tube is born is maximum, for this purpose, the utility model is by existing every membrane tube 4
The setting of branch mold core is reduced to 3 mold cores, meanwhile, the setting of existing 6 membrane tubes is increased into 8 membrane tubes, on the one hand, avoid
The probability that 4th membrane tube blocks improves the service efficiency of NF membrane mold core, on the other hand, two is added in nano filter membrance device
Root membrane tube has no effect on the filter efficiency of a whole set of nano filter membrance device.
（3）The utility model is added the mold core film layer runner of nano filter membrance device to 1.4mm by existing 0.8mm, is used
The broader film core of runner can increase film layer pollutant holding capability, and due to the increase of mold core film layer runner, film core filter area is from original
25m2It is reduced to 19m2, filter efficiency accordingly declines, and in actual use, half fiber concentration is more than the recycling of 60g/L suitable for waste liquid
Processing.
Description of the drawings
Fig. 1 is the NF membrane recovery process system of spent lye in the prior art.
Fig. 2 be the utility model is related to NF membrane recovery process system.
Wherein, 1-waste liquid tank, 2-nano filter membrance device, 2-1-membrane tube, 2-2-mold core, 3-filtrate tank, 4-product pump,
5-cartridge filter, 6-high-pressure pump, 7-circulating pump, 8-discharging of waste liquid pipe, 9-concentrating return-flow pipe, 10-concentrating return-flow valve,
11-circulation pipe, 12-purge tank, 13-cleaning raw material return duct, 14-cleaning net liquid return duct.
Specific embodiment
The utility model is described in further detail with reference to embodiment, but the embodiment of the utility model is not
It is limited to this.
Embodiment：
The present embodiment proposes a kind of NF membrane process system of spent lye depth recycling, which includes
The equipment such as waste liquid tank 1, purge tank 12, nano filter membrance device 2 and filtrate tank 3.Structure as shown in Figure 2 is it is recognised that waste liquid tank 1 is used
In collecting and storing viscose fiber wasted liquid, waste liquid tank 1 is equipped with heating unit or heat exchange jacket, for exchanging heat to spent lye,
Nano filter membrance device 2 connects waste liquid tank 1, be disposed on the pipeline between waste liquid tank 1 and nano filter membrance device 2 product pump 4,
Cartridge filter 5, high-pressure pump 6 and circulating pump 7, filtrate tank 3 connect the purified liquor outlet of nano filter membrance device 2, nano filter membrance device 2
Discharging of waste liquid pipe 8 is set on concentrated solution outlet, the concentrating return-flow pipe 9 of connection waste liquid tank 1, concentrating return-flow pipe 9 are set on discharging of waste liquid pipe 8
On set concentrating return-flow valve 10, circulation pipe 11 is set on the discharging of waste liquid pipe 8 of 10 front end of concentrating return-flow valve, circulation pipe 11 is communicated in
On pipeline between high-pressure pump 6 and circulating pump 7.
The NF membrane process system that the present embodiment is related to can realize the cleaning of nano filter membrance device 2 by Clear liquid tank, such as Fig. 2 knots
Shown in structure, Clear liquid tank is set between waste liquid tank 1 and product pump 4, and connection purge tank is set on the discharging of waste liquid pipe 8 of nano filter membrance device 2
Cleaning net liquid reflux is set in 12 cleaning raw material return duct 13, the purified liquor outlet of nano filter membrance device 2 and the connecting pipe of filtrate tank 3
Pipe 14.
In the present embodiment, nano filter membrance device 2 is improved on the basis of existing structure, and nano filter membrance device 2 uses 8
3 mold cores 2-2, the film layer runner 1.4mm of every film core are sequentially connected in series in the membrane tube 2-1, every membrane tube 2-1 being arranged in parallel.
The present embodiment can combine the depth recycling that existing NF membrane process system realizes spent lye, can specifically be summarized as follows：
First, during normal operation, spent lye is entered to protect by existing NF membrane recovery process system shown in FIG. 1 by product pump 4
Pacify filter 5, the nano filter membrance device 2 for entering 6 membrane tube 2-1 compositions in parallel after high-pressure pump 6 boosts is flowed into, by membrane tube 2-1
4 rolling NF membrane cores filtering after, spent lye, which is concentrated, flows back into waste liquid tank 1, filter out clear liquid be sent into filtrate tank 3, operation step
It is rapid as follows：
1）The waste liquid of alkali concn about 40~45g/L, half fiber content 35g/L are prepared in waste liquid tank 1, and is warming up to 50 DEG C；
2）Manually opened valve V1, V3, V4, manually opened dynamic product pump 4（Not frequency conversion）, manually opened high-pressure pump 6 adjusts
6 frequency of high-pressure pump is to 85%, 4 flow of control valve to 25m3/h；
3）When the hemicellulose level in waste liquid tank 1 reaches about 60g/L, no longer recycled, be fed directly to this implementation
The NF membrane process system that example is related to.
Operating procedure during cleaning state is as follows：
1）Dispensing：Valve V3, Open valve V6,12 liquid of tank to be cleaned are turned off manually under system running state shown in Fig. 1
Position reaches 90%, manually opened valve V3, closes valve V6；
2）Cleaning：Manually opened valve V2, V6, V4；Startup product pump manual Open valve V5 after 4,4 minutes, closes valve
Door V4；After cleaning 1 hour, cleaning is completed.
2nd, treat that spent lye is recycled to half fiber content 60g/L, 40~45g/L of alkali dense by NF membrane process system shown in FIG. 1
Spent lye after, continue depth recycling through NF membrane process system shown in Fig. 2, operating procedure is as follows：
1）By half fiber content 60g/L, the spent lye of 40~45g/L of alkali dense is pumped into waste liquid tank 1 shown in Fig. 2, is warming up to
55~58 DEG C；
2）Standard-sized sheet valve V1, V4 open regulating valve V3 to 30%, open regulating valve V5 to 50%；
3）Slowly start product pump 4 and automatically adjust electric machine frequency to 80%, 4 frequency of product pump reaches more than 75%, starts
Circulating pump 7（7 not frequency conversion of circulating pump）；
4）Circulating pump 7 start 10S clocks after, start high-pressure pump 6,6 frequency of high-pressure pump according into pressure with go out film pressure into
Row automatic adjustment（Go out film pressure in actual motion and be set as 16.5bar, 20bar is set smaller than into film pressure, if more than pressure
Force value is soon shut down）；
5）Regulating valve V3 and flowmeter M1 are chain in operational process, i.e., valve opening remains that M1 flows are 50m3/h；
6）The aperture of regulating valve V5 and flowmeter M2 (concentrating return-flow amount) and M3（Filter out flow quantity）It is chain（One is set herein
A k-factor, that is, K=（M1+M2）/M2=1.15）；
7）After running a period of time, when pressure difference reaches 3bar（Film pressure is subtracted out into film pressure）, standard-sized sheet valve V6
And regulating valve V5 is closed, start discharge.
Operating procedure during cleaning state is as follows：
1）Clean dispensing：Under operating status, Open valve V8 closes valve V4, by the cleaned raw material return duct of filter liquor
13 introduce purge tank 12；When 12 liquid level of purge tank reaches 90%, Open valve V4, closing valve V6；
2）Clean liftout：Open valve V2, V5, V6 under shutdown status；Start product pump 4, frequency is automatically adjusted to
100%, stop after remaining operational 260s；
3）Cleaning:Open valve V2, V7, V8 under shutdown status；Start product pump 4, frequency is automatically adjusted to 100%, clearly
Wash 3600s.
The above, is only the preferred embodiment of the utility model, and limit in any form is not done to the utility model
System, every any simple modification made according to the technical essence of the utility model to above example, equivalent variations, each falls within
Within the scope of protection of the utility model.
Claims (5)
1. a kind of NF membrane process system of spent lye depth recycling, it is characterised in that：Including sequentially connected waste liquid tank（1）、
Nano filter membrance device（2）And filtrate tank（3）, connect waste liquid tank（1）With nano filter membrance device（2）Between pipeline on be disposed with object
Material pump（4）, cartridge filter（5）, high-pressure pump（6）And circulating pump（7）, filtrate tank（3）Connect nano filter membrance device（2）Clear liquid
Outlet, nano filter membrance device（2）Concentrated solution outlet on set discharging of waste liquid pipe（8）, discharging of waste liquid pipe（8）On set connection waste liquid tank
（1）Concentrating return-flow pipe（9）, concentrating return-flow pipe（9）On set concentrating return-flow valve（10）, positioned at concentrating return-flow valve（10）It gives up front end
Liquid delivery pipe（8）On set circulation pipe（11）, circulation pipe（11）It is communicated in high-pressure pump（6）With circulating pump（7）Between pipeline on.
2. the NF membrane process system that a kind of spent lye depth according to claim requirement 1 recycles, it is characterised in that：Institute
State nano filter membrance device（2）The membrane tube being arranged in parallel including 8（2-1）, every membrane tube（2-1）Inside it is sequentially connected in series 3 mold cores（2-
2）.
3. the NF membrane process system that a kind of spent lye depth according to claim requirement 1 recycles, it is characterised in that：Institute
State nano filter membrance device（2）Mold core（2-2）Film layer runner is 1.4mm.
4. the NF membrane process system that a kind of spent lye depth according to claim requirement 1 recycles, it is characterised in that：Also
Including cleaning device, the cleaning device includes being set on waste liquid tank（1）With product pump（4）Between purge tank（12）, NF membrane
Device（2）Discharging of waste liquid pipe（8）On set connection purge tank（12）Cleaning raw material return duct（13）, nano filter membrance device（2）'s
Purified liquor outlet and filtrate tank（3）Connecting pipe on set cleaning net liquid return duct（14）.
5. the NF membrane process system that a kind of spent lye depth according to claim requirement 1 recycles, it is characterised in that：Institute
State waste liquid tank（1）On set heating unit or heat exchange jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721552744.XU CN207576141U (en) | 2017-11-20 | 2017-11-20 | Nanofiltration membrane process system for deep recovery of waste alkali liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721552744.XU CN207576141U (en) | 2017-11-20 | 2017-11-20 | Nanofiltration membrane process system for deep recovery of waste alkali liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207576141U true CN207576141U (en) | 2018-07-06 |
Family
ID=62732299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721552744.XU Active CN207576141U (en) | 2017-11-20 | 2017-11-20 | Nanofiltration membrane process system for deep recovery of waste alkali liquor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207576141U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855005A (en) * | 2017-11-20 | 2018-03-30 | 宜宾丝丽雅股份有限公司 | Nanofiltration membrane process system for deep recovery of waste alkali liquor |
| CN109534577A (en) * | 2018-12-25 | 2019-03-29 | 武汉艾科滤膜技术有限公司 | The method and apparatus of separated recycle waste lye via ultra-filtration film |
-
2017
- 2017-11-20 CN CN201721552744.XU patent/CN207576141U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107855005A (en) * | 2017-11-20 | 2018-03-30 | 宜宾丝丽雅股份有限公司 | Nanofiltration membrane process system for deep recovery of waste alkali liquor |
| CN109534577A (en) * | 2018-12-25 | 2019-03-29 | 武汉艾科滤膜技术有限公司 | The method and apparatus of separated recycle waste lye via ultra-filtration film |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204897562U (en) | Full -automatic intelligent pure water device | |
| CN207576141U (en) | Nanofiltration membrane process system for deep recovery of waste alkali liquor | |
| CN107855005A (en) | Nanofiltration membrane process system for deep recovery of waste alkali liquor | |
| JP2013169511A (en) | Membrane filtration system | |
| CN207025097U (en) | A kind of recycle of alkali liquor system | |
| CN210885551U (en) | Waste liquid recovery device of electrode foil | |
| CN210711486U (en) | Grape wine clarification filtration equipment | |
| CN107585914A (en) | Sausage casing heparin produces utilization of wastewater resource device | |
| WO2013035123A1 (en) | Plant and procedure for recovering used brine from dyeing vats | |
| CN104973657A (en) | Novel reverse osmosis membrane treatment system for dyeing wastewater advanced treatment | |
| CN107857395B (en) | Condensate fine treatment regeneration wastewater ammonia recovery system | |
| CN212999369U (en) | Beta-alanine electrodialysis desalination system | |
| CN108273388A (en) | A kind of cross-flow loop ultrafiltration super-pressure reverse osmosis treatment system | |
| CN108273389A (en) | A kind of forward and reverse reverse osmosis super-pressure reverse osmosis treatment system of cross-flow loop ultrafiltration | |
| CN108554186B (en) | Chemical cleaning method for industrial wastewater reverse osmosis membrane | |
| CN109095716B (en) | Production wastewater treatment system containing sericin | |
| CN209957516U (en) | Wash wool grease waste water circulating system | |
| CN208802903U (en) | A kind of twin-stage RO Pure water treatment equipment | |
| CN208869409U (en) | A kind of power plant condensation crystal processing regenerative wastewater processing system | |
| CN206814545U (en) | Reverse osmosis unit and desalting water treatment system | |
| CN101475267A (en) | Wastewater recovering treatment apparatus of wet steam generator | |
| JPH11137972A (en) | Equipment for producing pure water for boiler makeup water, production of pure water for boiler makeup water and hollow-fiber membrane filter unit | |
| CN206414843U (en) | A kind of cleaning regenerating unit of ceramic filter plate | |
| CN204911249U (en) | A submergence formula ultrafiltration system for preparing normal water | |
| CN109529625A (en) | Continuous nanofiltration process for alkali liquor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |