CN101306328A - Intellectual reclaimed water reclamation device cleaning method - Google Patents
Intellectual reclaimed water reclamation device cleaning method Download PDFInfo
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- CN101306328A CN101306328A CNA2008100743418A CN200810074341A CN101306328A CN 101306328 A CN101306328 A CN 101306328A CN A2008100743418 A CNA2008100743418 A CN A2008100743418A CN 200810074341 A CN200810074341 A CN 200810074341A CN 101306328 A CN101306328 A CN 101306328A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to a method for cleaning an intelligent middle-water recycling device relating to the biochemistry. The method comprises the steps as follows: A, a working signal of a water generation pipeline device is detected, a first aeration pipeline device or a back wash pipeline device is switched on according to the working signal, thereby carrying out the back wash to a membrane component; and B, the back wash is finished, the normal running state is recovered. The method further comprises a step A0 before the step A: A0, a timing time period T0 is set, when the timing time period T0 is achieved, the sludge return is started, that is, a sludge return pipeline device is started. The step A0 comprises the following steps: A01, a system is started to enter the normal working state, A02, the timing time period T0 is set, and A03, when the timing time period T0 is achieved, the starting of the sludge return and the starting of the aeration are alternately carried out according to the timing time period, and the starting of the aeration means to start the first aeration pipeline device and a second aeration pipeline device. The method has simple operation, good cleaning effect, strong practicality and high reliability.
Description
The application divides an application for following application:
The original application applying date: on September 21st, 2006
Original application application number: 2006100626877
Original application denomination of invention: a kind of intelligent type mid-water reuse device and cleaning method thereof
Technical field
The present invention relates to biochemistry, relate in particular to a kind of intelligent type mid-water reuse device cleaning method.
Background technology
Water problems has become the restraining factors of national economy sustainable development; realize that sewage recycling has tangible environmental benefit, economic benefit and social benefit; be to protect water resource and make the value-added effective way of water resource, also can alleviate the in short supply of water resource widely simultaneously.
Membrane bioreactor (MBR:Membrane Bio-reactor) is a kind of novel water technology that is combined with biological processing unit by film separation unit.
With respect to traditional biochemical water technology, it is good that MBR has an effluent quality, and facility compact, floor space are little; Characteristics such as easily realization is controlled automatically, operational management is simple.The part but MBR technology also comes with some shortcomings for controlling diaphragm pollutes, is recovered the design water flux of membrane module, and it is the difficult problem that must solve in the practical application that membrane module is cleaned.
In actual applications, present cleaning method to membrane module mainly contains two kinds of methods: physics cleans and Chemical cleaning.
Physics cleans the general boring aeration mode that adopts, utilize the shearing force of rising air water mixed flow to act on the surface of membrane module, wash away being deposited on the film surface contaminant, but then be difficult to remove for fenestra and film pipe internal contamination thing, required aeration rate was big when this kind mode was cleaned, energy consumption is also big, and scavenging period is long, and cleaning performance is relatively poor.
Chemical cleaning is to add cleaning agents such as suitable acid, alkali, oxidant in clear water, with backwashing pump cleaning agent solution is pumped into membrane aperture and film pipe inside.This kind cleaning is owing to the drug concentration height, and to the toxic effect of the activated sludge in the membrane bioreactor, membrane bioreactor recovers normal operation needs the long period.Membrane module is immersed in the liquid medicine, thoroughly cleans, can at utmost recover the membrane module membrane flux, realize the regeneration of membrane module; But this kind cleaning way needs membrane module is taken out from membrane bioreactor, complicated operation and require great effort time-consuming.
Also have to unite and adopt physics to clean with the Chemical cleaning mode, earlier membrane module is taken out from reactor, immerse in the chemical solution, adopt the perforated pipe aerating regulation mode to clean simultaneously, thereby realize the thorough cleaning and regeneration of membrane module.
More than several cleaning methods shortcoming is all arranged, adopt physics to clean aeration method, cleaning performance is not thorough; Adopt chemical cleaning method then to need membrane module to be taken out the complex operation complexity from membrane bioreactor.
Summary of the invention
The object of the present invention is to provide a kind of easy and simple to handle and intelligent type mid-water reuse device cleaning method that cleaning performance is good, not thorough to solve in the prior art cleaning performance, the complex operation complicated problems.
Intelligent type mid-water reuse device cleaning method of the present invention adopts following steps:
The working signal of A, detection water producing pipe duct device is connected the first aerated conduit device or recoil tube duct device according to working signal, to the membrane module backwash;
B, end backwash recover normal operating condition.
Also comprise the steps A0 before the described steps A:
A0, timing period T 0 of setting when this timing period T 0 arrives, start mud and reflux, and promptly start the mud return line duct device.
Described steps A 0 comprises the steps:
A01, system start, and enter normal operating conditions;
A02, timing period T 0 of setting;
A03, when this timing period T 0 arrives, start mud and reflux and start aeration and hocket by timing period T 0, described startup aeration is promptly opened the first aerated conduit device and the second aerated conduit device.
Described steps A comprises the steps:
A1, control module receive manometric pressure signal;
A2, carry out following operation according to the self-priming pressure of the self priming pump that this pressure signal reflected and a pressure threshold F1 who sets:
A21, when self-priming pressure during greater than pressure threshold F1, close normal operating conditions, start the first aerated conduit device and recoil tube duct device, membrane module is carried out the physics backwash, continue step B;
A22 otherwise, return steps A 1.
In the described steps A 21, at first a frequency and a frequency threshold value f1 who sets who is exceeded according to described pressure threshold F1 compares, if the frequency that exceeds then carries out chemical backwash to membrane module greater than frequency threshold value f1.
Beneficial effect of the present invention is: in the present invention, separate setting by the membrane filtration pond with biological reaction pool, and set up and be used for the first aerated conduit device and the recoil tube duct device that membrane module cleans, can realize physics or chemistry recoil/cleaning and regeneration to membrane module in the membrane filtration pond, need not membrane module is taken out, with respect to prior art, the present invention has simplified operating process greatly, and, when the present invention carries out cleaning and regeneration to membrane module, can the sludge activity in the biological reaction pool not exerted an influence (almost can realize cleaning and normal operation between more seamless operation), can recover the normal operation of MBR soon, no matter this first aerated conduit device of the present invention and recoil tube duct device integration mode are then for adopting physics (aeration) backwash or chemical backwash, or adopt both combinations, all simple and easy to do, can realize the thoroughly effect of cleaning, membrane module can at utmost be regenerated, therefore, the present invention is easy and simple to handle and cleaning performance good.
In the present invention, a dividing plate is set in the biological reaction pool, the relatively little space of being told by dividing plate is as the membrane filtration pond, water in the biological reaction pool covers the overhead stream of dividing plate to the membrane filtration pond, isolate the membrane filtration pond by this employing dividing plate, can realize existing sewage disposal system (as ordinary activated sludge treating apparatus, oxidation ditch treating apparatus, contact oxidizing treatment device etc.) is transformed, its transformation, the upgrading simple and easy to do, cost is low, has improved practicality of the present invention.
In the present invention, the mud return line duct device is set in the membrane filtration pond, the mud return line duct device is communicated to into water discharge tube device, just can reflux to high concentration sludge in the membrane filtration pond, reduced sludge concentration in the membrane filtration pond, alleviated the too high pollution of sludge concentration, further improved practicality of the present invention and functional reliability membrane module.
In the present invention, by using the working signal of control module according to setting data or water producing pipe duct device, control the duty of each plumbing installation, can realize the automation of technological operation, improve operating efficiency, help regularization of MBR equipment and standardization, make the present invention be suitable for large-scale industrial production, thereby enhance productivity, reduce cost, simultaneously, setting rules operation by control module, this individual demand for technological operation are more easily satisfied again and (only intuitively are embodied in control module internal control data, the editor of flow process, revise etc.), therefore, this mode of operating automatically by the control module realization has good economic benefit and vast market prospect, has suitable practicality.
Description of drawings
Fig. 1 is a system architecture schematic diagram of the present invention;
Fig. 2 is an electric control principle schematic of the present invention;
Fig. 3 is the local enlarged diagram of dividing plate of the present invention top matrix notch;
Fig. 4 is a basic controlling flow process schematic diagram of the present invention;
Fig. 5 is the concrete control flow schematic diagram of the present invention.
The specific embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
According to Fig. 1 and Fig. 2, the present invention includes biological reaction pool 1, membrane module 2, clear water reserviors 3, membrane filtration pond 4, water inlet discharge tube device 11, water producing pipe duct device 21, outlet conduit device 31, the first aerated conduit device 22, the second aerated conduit device 12, recoil tube duct device 23, mud return line duct device 41 and control module 6.
In the present embodiment, as shown in Figure 1, biological reaction pool 1 is in the same pond with membrane filtration pond 4 originally, and a dividing plate 5 is set in biological reaction pool 1, the relatively little space of being told by dividing plate 5 is as membrane filtration pond 4, and the water in the biological reaction pool 1 covers the overhead stream of dividing plate 5 to membrane filtration pond 4.Biological reaction pool 1 and the spatial volume ratio between the membrane filtration pond 4 that dividing plate 5 is told are 1: 1 to 10: 1, and in the present embodiment, this spatial volume ratio adopted preferred values 3: 1.Membrane module 2 places membrane filtration pond 4.
As shown in Figure 3, the top of dividing plate 5 is provided with matrix notch 51, and this matrix notch 51 is similar to zigzag.
As shown in Figure 1, water inlet discharge tube device 11 is used for the water inlet or the discharging of biological reaction pool 1, water inlet discharge tube device 11 comprises inlet channel 111, drainage pipeline 112, magnetic valve M0 and magnetic valve M1, magnetic valve M0 is installed in the inlet channel 111, and magnetic valve M1 is installed in the drainage pipeline 112.
As shown in Figure 1, from clear water reserviors 3 outputs, outlet conduit device 31 comprises outlet conduit 311, clarified water pump 312 and magnetic valve M9 to outlet conduit device 31 with clear water, and clarified water pump 312 and magnetic valve M9 are installed in the outlet conduit 311.
As shown in Figure 1, water producing pipe duct device 21 comprises water producing pipe road 211, self priming pump 212, magnetic valve M8 and Pressure gauge P, water producing pipe road 211 is communicated to clear water reserviors 3 by membrane module 2, self priming pump 212, hand-operated valve H8, magnetic valve M8 and Pressure gauge P are installed in the water producing pipe road 211, as shown in Figure 2, the self-priming pressure of Pressure gauge P test self priming pump 212, and with pressure signal transmission to control module 6.
As shown in Figure 1, the present invention is provided with the first aerated conduit device 22 and the second aerated conduit device, 12, the first aerated conduit devices 22 are used for membrane module 2 aerations, and the second aerated conduit device 12 is used at biological reaction pool 1 aeration.
The first aerated conduit device 22 comprises first aerated conduit 221, magnetic valve M5 and hand-operated valve H5, and magnetic valve M5 and hand-operated valve H5 are installed in first aerated conduit 221, and first aerated conduit 221 leads to the bottom of membrane module 2.
The second aerated conduit device 12 comprises second aerated conduit 121, magnetic valve M3 and hand-operated valve H3, magnetic valve M3 and hand-operated valve H3 are installed in second aerated conduit 121, second aerated conduit 121 leads to the bottom of biological reaction pool 1, and first aerated conduit 221 and second aerated conduit 121 have common inlet.
As shown in Figure 1, recoil tube duct device 23 is used for 4 backwashes of membrane filtration pond, is communicated to membrane module 2 and membrane module 2 tops by outlet conduit device 31.
Particularly, as shown in Figure 1, recoil tube duct device 23 comprises recoil pipeline 231, the first recoil arm 232, second recoil arm 233, magnetic valve M6, magnetic valve M7 and the hand-operated valve H6.
As shown in Figure 1, recoil pipeline 231 1 ends are connected with outlet conduit 311, the other end of recoil pipeline 231 is the common port of the first recoil arm 232 and the second recoil arm 233, the first recoil arm 232 is communicated to the top of membrane module 2, and the second recoil arm 233 is connected to membrane module 2 inside with water producing pipe road 211.
As shown in Figure 1, magnetic valve M6 is installed in the first recoil arm 232, and magnetic valve M7 is installed in the second recoil arm 233, and hand-operated valve H6 is installed in the recoil pipeline 231.
As shown in Figure 1, mud return line duct device 41 is arranged in the membrane filtration pond 4, and mud return line duct device 41 is communicated to into water discharge tube device 11 and biological reaction pool 1.
Particularly, as shown in Figure 1, mud return line duct device 41 comprises reflux line 411, the first backflow arm 412, the second backflow arm 413, reflux pump 414, magnetic valve M2 and magnetic valve M4.
As shown in Figure 1, reflux pump 414 is placed in the bottom in membrane filtration pond 4, reflux pump 414 connects reflux line 411, the other end of reflux line 411 is the common port of the first backflow arm 412 and the second backflow arm 413, the first backflow arm 412 is communicated to the top of biological reaction pool 1, and the second backflow arm 413 is communicated to the into drainage pipeline 112 of water discharge tube device 11.
As shown in Figure 1, magnetic valve M4 is installed in the first backflow arm 412, and magnetic valve M2 is installed in the second backflow arm 413.
As shown in Figure 2; control module 6 is according to the working signal of setting data or water producing pipe duct device 21; control water inlet discharge tube device 11; water producing pipe duct device 21; outlet conduit device 31; the first aerated conduit device 22; the duty of recoil tube duct device 23 or mud return line duct device 41; setting data comprises timing period T 0; system-down delay time T1; the pressure threshold F1 that sets and the frequency threshold value f1 of setting etc.; the working signal of water producing pipe duct device 21 specifically comprises the pressure signal of Pressure gauge P etc.; control module 6 is judged the duty of membrane module 2 according to received pressure signal, can corresponding startup to the physics or the chemical backwash of membrane module 2.As shown in Figure 2, control module 6 is directly controlled the duty of magnetic valve M0, magnetic valve M1, magnetic valve M2, magnetic valve M3, magnetic valve M4, magnetic valve M5, magnetic valve M6, magnetic valve M7, magnetic valve M8, magnetic valve M9, self priming pump 212, clarified water pump 312 and reflux pump 414.
As depicted in figs. 1 and 2, in normal operating conditions of the present invention, the electric elements of often opening have reflux pump 414, self priming pump 212 and clarified water pump 312, magnetic valve M4, magnetic valve M3 and magnetic valve M5, magnetic valve M8, magnetic valve M9, all the other valves are normally closed, and available manual adjustments hand-operated valve H3, hand-operated valve H5, hand-operated valve H6 are with difference adjustments of gas flow and output clear water flow.When normally moving continuously, by inlet channel 111 water inlets of biological reaction pool 1, sewage produces clear water by 2 filtrations of membrane module in the membrane filtration pond 4 again after biological treatment.
As shown in Figure 4, basic controlling flow process of the present invention is as follows:
I, system start, and enter normal operating conditions.
Ii, timing period T 0 of setting, this timing period T 0 can be stored in the control module 6.
Iii; when timing period T 0 arrives; in actual applications; at first stop the whole system operation; behind the system-down delay time T1 through setting; can be at the bottom precipitation mud in membrane filtration pond 4; like this; system is through the sludge settling of T1 time; help to improve the operating effect that mud refluxes, this moment, control module 6 startup mud refluxed, promptly; control module 6 starts mud return line duct device 41; control module 6 makes reflux pump 414 work and magnetic valve M4 conductings, makes mud in the membrane filtration pond 4 be back to the front portion of biological reaction pool 1, and 414 operation a period of times of reflux pump can shut down.
Iv, control module 6 detect the working signal of water producing pipe duct device 21, connect the first aerated conduit device 22 or/and recoil tube duct device 23 carries out physics or chemical backwash to membrane module 2 according to working signal.
After v, the end backwash, under the control of control module 6, recover normal operating condition, return step I ii.
As shown in Figure 5, the present invention adopts following concrete control flow:
1. system starts, and enters normal operating conditions.
2. set a timing period T 0, this timing period T 0 can be stored in the control module 6.
3. control module 6 timing judge whether to arrive timing period T 0, carry out following operation:
31. if no show timing period T 0 continues following steps 4.
32. if arrived timing period T 0, control module 6 detects whether started the mud backflow, for this detection, control module 6 can obtain testing result by obtaining run signal from reflux pump 414, or in control module 6, directly preserve the startup record that mud refluxes, as for its specific operation process, method, this can not need to pay creative work to those skilled in the art can implement, and repeats no more herein.Control module 6 is carried out following operation according to testing result:
321. if behind one section sedimentation time T1, mud refluxes and finishes, then stopping mud refluxing, start aeration, that is, make the first aerated conduit device 22 and the second aerated conduit device 12 open magnetic valve M5 and magnetic valve M3 conducting in the control module 6 control first aerated conduit devices 22 and the second aerated conduit device 12, gas imports the bottom of membrane module 2 and biological reaction pool 1 respectively by first aerated conduit 221 and second aerated conduit 121, continues following steps 4.
322. otherwise, control module 6 detects whether started aeration, control module 6 can obtain testing result by the conducting state that detects magnetic valve M5 and magnetic valve M3, certainly, also can adopt other method, those of ordinary skills can not need to pay creative work and give multiple enforcement, repeat no more herein.Control module 6 is carried out following operation according to testing result:
3221., then stop aeration if aeration starts, behind one section sedimentation time T1, start mud and reflux, continue following steps 4.
3222. otherwise, then directly start mud and reflux, continue following steps 4.
4. control module 6 receives the pressure signal of Pressure gauge P, pressure signal has reflected the self-priming pressure of self priming pump 212, the pressure threshold F1 of a setting can be stored in the control module 6 in advance, pressure threshold F1 can be set at+0.04～-0.04Mpa, the self-priming pressure of 6 pairs of pressure signal reflections of control module is compared with pressure threshold F1, carries out following operation:
41. if self-priming pressure greater than pressure threshold F1, illustrates that membrane module 2 has produced the contamination and plugging situation.
At this moment, the frequency that control module 6 is exceeded according to pressure threshold F1 is done further to judge, here said frequency is meant that the self-priming pressure of self priming pump 212 reaches the frequent degree of pressure threshold F1, this height of frequently spending, the film contamination and plugging aggravation of membrane module 2 just is described, membrane flux obviously descends, membrane module 2 need thoroughly clean, computational methods as for frequency, control module 6 can be preserved the time that last self-priming pressure reaches pressure threshold F1, the time that reaches pressure threshold F1 with this self-priming pressure is subtracted each other back calculating inverse with the last time, can calculate frequency, preserve the frequency threshold value f1 of a setting in control module 6, control module 6 is compared the frequency (frequency that promptly exceeds) that calculates with frequency threshold value f1, carry out following operation:
411. greater than frequency threshold value f1, control module 6 is closed normal operating conditions, and membrane module 2 is carried out chemical backwash as if the frequency that exceeds, and continues following steps 5.
412. otherwise control module 6 is closed normal operating conditions, starts the first aerated conduit device 22 and recoil tube duct device 23, and membrane module 2 is carried out the physics backwash, continues following steps 5.
42. otherwise, return step 3.
5. after the end backwash, under the control of control module 6, recover normal operating condition, return step 3.
Like this, realized that by above-mentioned steps 32, step 321, step 322, step 3221 and step 3222 startup mud refluxes and the startup aeration hockets by timing period T 0.Can make the present invention realize that on the whole physics backwash and chemical backwash combine by above-mentioned steps 4, step 41, step 411 and step 412, and not need membrane module 24 interior taking-ups from the membrane filtration pond can be obtained excellent cleaning effect.
In the present invention, the process of physics backwash is as follows:
In the present invention, the process of chemical backwash is as follows:
1) add the cleaning chemical agent in clear water reserviors 3, as acid, alkali, oxidant (clorox) etc., biological reaction pool 1 leaves standstill 5-15 minute (present embodiment adopted 10 minutes) with membrane filtration pond 4.
2) control module 6 opens solenoid valve M1, discharging biological reaction pool 1 internal upper part clear water is closed magnetic valve M1 again.
3) control module 6 is opened sludge reflux pumps 414 and magnetic valve M4, with activity sludge reflux in the membrane filtration pond 4 to biological reaction pool 1.
4) after backflow finished, control module 6 was closed magnetic valve M4, and opens solenoid valve M2 outwards discharges membrane filtration pond 4 top clear water with sludge reflux pump 414 simultaneously.
5) behind the emptying membrane filtration pond 4, close sludge reflux pump 414.
6) control module 6 is opened clarified water pump 312 and magnetic valve M6, and 4 interior inject (step 1)) have cleaning chemical agent solution toward the membrane filtration pond, and membrane module 2 is soaked.
7) behind the cleaning chemical agent solution submergence membrane module 2 that injects, control module 6 is closed electromagnetism M6, and opens solenoid valve M5 and magnetic valve M7 carry out the chemical liquid backwash to membrane module 2, simultaneously, carry out aeration and wash away the film surface.
8) after after a while, control module 6 is closed magnetic valve M5, magnetic valve M7 and clarified water pump 312, opens sludge reflux pump 414 and magnetic valve M2, with chemical liquid medicine emptying in the membrane filtration pond 4, and closing volume pumps 414 and magnetic valve M2 again.
Certainly, the detailed description of above-mentioned detailed process for physics backwash and chemical backwash is not meaning the qualification to physics backwash and chemical backwash among the present invention, to those skilled in the art, can not need to pay creative work and can implement multiple conversion/alternative form or combination, repeat no more herein.
In sum, although basic structure of the present invention, principle, method are specifically set forth by the foregoing description, under the prerequisite that does not break away from main idea of the present invention, according to above-described inspiration, those of ordinary skills can not need to pay creative work can implement multiple conversion/alternative form or combination, repeats no more herein.
Claims (5)
1. intelligent type mid-water reuse device cleaning method, it is characterized in that: it adopts following steps:
The working signal of A, detection water producing pipe duct device is connected the first aerated conduit device or recoil tube duct device according to working signal, to the membrane module backwash;
B, end backwash recover normal operating condition.
2. intelligent type mid-water reuse device cleaning method according to claim 1 is characterized in that: also comprise the steps A0 before the described steps A:
A0, timing cycle of setting when this timing cycle arrives, start mud and reflux, and, start the mud return line duct device that is.
3. intelligent type mid-water reuse device cleaning method according to claim 2 is characterized in that: described steps A 0 comprises the steps:
A01, system start, and enter normal operating conditions;
A02, timing cycle of setting;
A03, when this arrives in timing cycle, start mud and reflux and start aeration and hocket by the timing cycle, described startup aeration is promptly opened the first aerated conduit device and the second aerated conduit device.
4. according to claim 1 or 2 or 3 described intelligent type mid-water reuse device cleaning methods, it is characterized in that: described steps A comprises the steps:
A1, control module receive manometric pressure signal;
A2, carry out following operation according to the self-priming pressure of the self priming pump that this pressure signal reflected and a pressure threshold of setting:
A21, when self-priming pressure during greater than pressure threshold, close normal operating conditions, start the first aerated conduit device and recoil tube duct device, membrane module is carried out the physics backwash, continue step B;
A22 otherwise, return steps A 1.
5. the described intelligent type mid-water reuse device cleaning method of claim 4, it is characterized in that: in the described steps A 21, at first a frequency that is exceeded according to described pressure threshold and a frequency threshold of setting, if the frequency that exceeds then carries out chemical backwash to membrane module greater than the frequency threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100743418A CN101306328A (en) | 2006-09-21 | 2006-09-21 | Intellectual reclaimed water reclamation device cleaning method |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100743418A CN101306328A (en) | 2006-09-21 | 2006-09-21 | Intellectual reclaimed water reclamation device cleaning method |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100626877A Division CN100453478C (en) | 2006-09-21 | 2006-09-21 | Intelligent type mid-water reuse device and cleaning method thereof |
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| CN101306328A true CN101306328A (en) | 2008-11-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990383A (en) * | 2014-03-20 | 2014-08-20 | 河海大学 | Chemical cleaning method of external pressure membrane system |
| CN110813098A (en) * | 2019-11-18 | 2020-02-21 | 上海安赐环保科技股份有限公司 | Sulfuric acid method titanium dioxide production method and cleaning method of membrane equipment |
-
2006
- 2006-09-21 CN CNA2008100743418A patent/CN101306328A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990383A (en) * | 2014-03-20 | 2014-08-20 | 河海大学 | Chemical cleaning method of external pressure membrane system |
| CN103990383B (en) * | 2014-03-20 | 2016-02-03 | 河海大学 | A kind of external-compression type membranous system chemical cleaning method |
| CN110813098A (en) * | 2019-11-18 | 2020-02-21 | 上海安赐环保科技股份有限公司 | Sulfuric acid method titanium dioxide production method and cleaning method of membrane equipment |
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Open date: 20081119 |