CN1226196C - Method and apparatus for preparing flocculant - Google Patents
Method and apparatus for preparing flocculant Download PDFInfo
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- CN1226196C CN1226196C CN 02138937 CN02138937A CN1226196C CN 1226196 C CN1226196 C CN 1226196C CN 02138937 CN02138937 CN 02138937 CN 02138937 A CN02138937 A CN 02138937A CN 1226196 C CN1226196 C CN 1226196C
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Abstract
The present invention relates to a method and equipment thereof for preparing a water treating flocculant. The method for preparing a flocculant adopts an electrolytic method, an electrolyte is in an electrolytic cell, and an anode and a cathode are alternately arranged in the electrolytic cell. The present invention is characterized in that low voltage alternating pulse heavy current is conducted to electrolytic electrodes to prepare the flocculant under the magnetic induction strength of 0 T to 0.8 T, the electrical impulse frequency of 0Hz to 100Hz is continuous and adjustable, the pulse duty time is continuous and adjustable from 0 second to 1 second, and the voltage is continuous and adjustable from 0 V to 100 V. The preparation equipment comprises an electrolytic cell (1), an electrode plate (2), an electrolyte circulating pump (3) and an electrolyte (5), wherein the electrolyte (5) is in the electrolytic cell (1), and the anode and the cathode are alternately arranged in the electrolytic cell (1). The equipment is characterized in that permanent magnets or electromagnetic wire bags (4) are arranged on the periphery of the electrolytic cell (1), and the anode and the cathode are connected with a pulse alternating power supply. The defects of the polarization and the passivation of the electrodes are thoroughly overcome, and the electrolytic efficiency is greatly raised.
Description
Technical field
The present invention relates to a kind of method and equipment thereof for preparing water treatment flocculant.
Background technology
In water treatment, usually with flocculation agent make a return journey dewater in suspended state and dispersion agent figure impurity.The preparation method of flocculation agent has electrolytic process, and it is to make electrolysis power with the Constant Direct Current low-voltage, high-current, and utilizes agitator to form powerful mechanical stirring with increase mass transfer solution, thereby reduces concentration polarization, but has the polarization and the passivation phenomenon of electrolysis electrode.
Most popular typical inorganic polymeric flocculant is a polymerize aluminum chloride.Polymerize aluminum chloride is typical inorganic polymer flocculant, and its flocculating property is 2 ~ 3 times with the common flocculation agent of dosage, although it is compared with polyacrylamide, flocculating property is poor slightly, and its price and residual toxicity are also far below polyacrylamide.Therefore, it is still that a kind of flocculation ability is strong by contrast, flocculation rate is fast and price is cheaper again, in treating water the lower good flocculation agent of residual quantity, thereby be widely adopted now.
Electrolytic process (Chinese patent publication number CN1177653A), this method is in special reactor, the effective polymerization reaction take place of the hydroxyl ion that utilizes trivalent aluminium ion controllably to produce under electrochemical conditions is with preparation high-efficiency polymerization aluminum chloride.This method is made negative electrode with iron plate, makes anode with aluminium sheet, makes electrolysis power with the Constant Direct Current low-voltage, high-current, and utilizes agitator to form powerful mechanical stirring with increase mass transfer solution, thereby reduces concentration polarization.Chloride ion content overcomes anode passivation in the solution by increasing.Its Electrode reaction is:
Anodic reaction:
Cathodic reaction:
Total reaction is:
This method is a kind of advanced electrolysis process for preparing high-purity high-efficiency polymerization aluminum chloride, but its weak point is a process control condition, and strict difficulty is controlled, the required electrochemical reaction time is long, and the powerful mechanical stirring mode that it adopted lowers the electrode concentration polarization and increases polarization and the passivation phenomenon that mode that chloride ion content in the solution overcomes anode passivation can not thoroughly overcome electrolysis electrode.
Summary of the invention
The object of the present invention is to provide a kind of method and equipment thereof for preparing flocculation agent, thoroughly overcome in the current electrolytic process preparation, defective that still difficult thoroughly elimination of polarization of electrode and passivation phenomenon and required electrochemical reaction time are long and collaborative and intensified electrolysis effect with various effects, thereby the method suitability for industrialized production that makes electrolytic process prepare high-efficiency polymerization aluminum chloride is easier to realize, and cost is lower.
To achieve these goals, technical scheme of the present invention is: a kind of method for preparing flocculation agent, adopt electrolytic process, electrolyte level is in electrolyzer, electrolytic solution is aluminum chloride or iron(ic) chloride, in electrolyzer, be arranged alternately anode and negative electrode, it is characterized in that at magnetic induction be under 0.02 ~ 0.2T, passed to the big electric current of low pressure alternating impulse with electrical impulse frequency to electrolysis electrode and make polymerize aluminum chloride or poly-ferric chloride; Its electrical impulse frequency is 0.5 ~ 15Hz, and its pulse duty time is 0 second, and its output pulse waveform is a square wave, and its momentary impulse voltage max is 2 ~ 9V, and the momentary impulse current maxima is 3 ~ 10A/dm
2
Described electrolytic solution is aluminum chloride, and electrolyzer inner anode and negative electrode are aluminium sheet.
Described electrolytic solution is iron(ic) chloride, and anode and negative electrode are iron plate.
A kind of equipment of implementing aforesaid method, comprise electrolyzer 1, pole plate 2, electrolyte circulating pump 3, electrolytic solution 5, electrolytic solution 5 is positioned at electrolyzer 1, electrolytic solution is aluminum chloride or iron(ic) chloride, anode and negative electrode have been arranged alternately in the electrolyzer 1, it is characterized in that being provided with permanent magnet or insulated wire bag 4 around the electrolyzer 1, anode is connected with the pulse alternating source with negative electrode.
Described anode and negative electrode, for positive negative electrode to many to parallel way, its anode and cathode spacing are 1～10mm.
The present invention has promoted charged ionic mass transfer motion in the solution greatly owing to adopt the adding of the magnetic field force of suitable magnetic induction, makes polarization of electrode and passivation phenomenon be effectively controlled.Because the present invention has adopted the pulse alternating source, has caused the continuous antipole of electrolysis electrode, passive film one formation is the dissolved condition on the electrode thereby make, and therefore can thoroughly overcome the electrode passivation phenomenon, has improved electrolytic efficiency greatly.
Additional have in the electrochemical reactor in magnetic field at one, make electric anode and electric negative electrode respectively with aluminium sheet, aluminum strip or aluminium wire, with the aluminum chloride is electrolytic solution, and within a certain period of time and under the synergy of the complementary field of certain magnetic induction, utilize the pulse alternating source electrolysis electrode to be applied the big electric current of low pressure alternating impulse of certain electrical impulse frequency, form the alternation electrochemical field, thereby realize that efficient electrolysis prepares the process of high-purity high-efficiency polymerization liquor alumini chloridi.Owing to have the adding of the magnetic field force of certain structure of suitable magnetic induction or form, promoted charged ionic mass transfer motion in the solution greatly, make polarization of electrode and passivation phenomenon be effectively controlled, the result makes in the electrochemical field limit current density under the equal voltage conditions increase one to two times; Again because the applying of the big electric current of low pressure alternating impulse, make anodic-cathodic constantly carry out the periodicity commutation with certain frequency, cause the electrode concentration polarization to be suppressed, and the passive film that generates on the electrode is constantly dissolved, thereby thoroughly overcome polarization of electrode and passivation phenomenon, improved electrolytic efficiency greatly.
Electrochemical principle of the present invention is as follows:
One, the reaction of the dissolving of aluminium electrode and the poly-aluminium of generation:
Anodic reaction:
Cathodic reaction:
Total chemical reaction is:
The anti-polarity current of the formation of passive film and passive film dissolving (passivation of aluminium electrode and activation) when two, aluminium is as anode:
Can find out from main principle of electrochemical reaction of the present invention: owing to form Al at aluminum anode
2O
3Passive film needs certain electric weight, therefore when electrode antipole (feeding cathodic current) passive film is dissolved rapidly.Because the present invention has adopted the pulse alternating source, has caused the continuous antipole of this electrolysis electrode, passive film one formation is the dissolved condition on the electrode thereby make, and therefore can thoroughly overcome the electrode passivation phenomenon.
Characteristics of the present invention:
1, added magnetic field on the electrochemical reactor, therefore because the synergy of magnetic field and alternation electrochemical field, make the various positive negatively charged ion in the solution produce rotatablely moving strongly marching on towards or break away from the process of anodic-cathodic perpendicular to field direction, this rotatablely moving increased the conductive capability of solution greatly, effectively weakened the polarization of electrode phenomenon, its macroscopical result is: compare with the electrolytic process that does not apply the action of a magnetic field with voltage with other condition, thereby its limit current density increase has improved electrolytic efficiency.And the increase of limit current density not only is proportional to magneticstrength, also is proportional to the degree of irregularity in magnetic field and the frequency of field direction alternation under certain condition.
2, constantly carry out the electrolysis mode of periodical exchange by use low voltage low pulse frequency anodic-cathodic that component pulse-changing power causes, thoroughly overcome the passivation phenomenon of electrode.When the working parameter of this power supply is set in the optimum electrolysis operating mode scope, the preparation of the electrolytic process of polymerize aluminum chloride will enter an efficient stage.
3, present device, its maximum constructional feature is:
(1), for industrial production type complete machine, the additional magnetic approach of institute adopts a magnetic field-electrode pair blocking to organize array mode more.Array mode is organized in this blocking more makes the structure of complementary field and form be able to flexible selection, makes magneto and electromagnetic type all realize easily, and also easily causes bigger magnetic induction, field gradient and suitable alternative frequency.Generally speaking, after magneticstrength 〉=0.02T, complementary field can both play a significant role.
(2), interelectrode distance adopts the extra small spacing of 1 ~ 10mm to guarantee can not cause in the consumption of electrode process anode and cathode to bump the sheet short circuit again simultaneously.Owing to adopted extra small spacing, not only make the path contraction of ion directional migration, and make the electrolytic solution of pumping pump circulation can produce flow at high speed betwixt, further improved the rate of mass transfer of electrolytic process.Favourable to energy-efficientization of electrolytic process.
4, present method under normal pressure with suitable voltage, the electric current of setting pulse power supply, pulse-repetition and suitable complementary field intensity are controlled the top efficiency of electrochemical synthesis polymerize aluminum chloride, single plane automation degree height, therefore make preparation technology's flow process simple, easily control, the constant product quality that obtains.
5, present method equipment electromechanical integration degree height, facility compact floor space are extremely little and be easy to move, and therefore can be directly used in situ production and add, thus the storage of saving water treatment agent, dissolving and transportation can be saved the mass production expense.
6, the polymerize aluminum chloride of this law preparation does not have any impurity, and is easy to control the quality, effectively overcome the drawback that existing chemical preparation process is difficult to obtain stable prod.
7, its basicity of polymerize aluminum chloride product of this law acquisition is apparently higher than existing commercially available product, and flocculating effect is significantly improved than existing commercially available prod.The polymerize aluminum chloride aqueous solution, basicity 55%～85%, the concentration 0.1～0.2mol/l of polymeric aluminum.
8, the layout of present method electrolysis electrode has considered to use general aluminum products to process the possibility of the more regular leftover bits that abandon, so can constitute the production technique of a cover environmental type.
9, the present invention can produce multiple compound polymeric flocculant in an equipment.Because the present invention uses special-purpose component pulse-changing power, but the result makes the periodical changes of every cube electrode polarity, all can serve as positive electrode and carry out the ion stripping.Therefore, if half electrode is made the aluminium electrode, and half electrode is made the ferroelectric utmost point, is under the situation of aluminum chloride (or iron(ic) chloride) at electrolytic solution then, can produce aluminium iron polychloride; At electrolytic solution is under the situation of Tai-Ace S 150 (or ferric sulfate), but the production PAFS; And be that aluminum chloride (iron) adds under the situation of Tai-Ace S 150 (iron), but production polymerization chloro sulphuric acid ferro-aluminum at electrolytic solution.
Description of drawings
Fig. 1 is magnetic field of the present invention---an electrochemical field electrolysis cells structural representation
Fig. 2 is that Fig. 1 is along B-B line sectional view
Wherein: 1-electrolyzer, 2-pole plate, 3-electrolyte circulating pump, 4-permanent magnet or insulated wire bag, 5-electrolytic solution.
Embodiment
As shown in Figure 1 and Figure 2, a kind of method for preparing flocculation agent, adopt electrolytic process, electrolyte level is in electrolyzer, electrolytic solution is aluminum chloride or iron(ic) chloride, being arranged alternately anode and negative electrode in electrolyzer, is under 0.02 ~ 0.2T at magnetic induction, passes to the big electric current of low pressure alternating impulse with electrical impulse frequency to electrolysis electrode and makes polymerize aluminum chloride or poly-ferric chloride; Its electrical impulse frequency is 0.5 ~ 15Hz, and its pulse duty time is 0 second, and its output pulse waveform is a square wave, and its momentary impulse voltage max is 2 ~ 9V, and the momentary impulse current maxima is 3 ~ 10A/dm
2
Described electrolytic solution is aluminum chloride, electrolyzer inner anode and negative electrode are aluminium sheet, under magnetic induction, pass to the big electric current of low pressure alternating impulse with electrical impulse frequency to electrolysis electrode and make polymerize aluminum chloride, its polymerize aluminum chloride aqueous solution, basicity 55%～85%, the concentration 0.1～0.2mol/l of polymeric aluminum.
Described electrolytic solution 5 is FeCl
3The aqueous solution, anode and negative electrode are iron plate, under magnetic induction, pass to the big electric current of low pressure alternating impulse with electrical impulse frequency to electrolysis electrode and make poly-ferric chloride.
A kind of equipment by the method for preparing flocculation agent, comprise electrolyzer 1, pole plate 2, electrolyte circulating pump 3, electrolytic solution 5, electrolytic solution 5 is positioned at electrolyzer 1, electrolytic solution is aluminum chloride or iron(ic) chloride, anode and negative electrode have been arranged alternately in the electrolyzer 1, it is characterized in that being provided with permanent magnet or insulated wire bag 4 around the electrolyzer 1, anode is connected with the pulse alternating source with negative electrode.
Aforesaid electrolyte circulating pump 3 can place in the electrolyzer stationary tank with anticorrosion submerged pump, and also available corrosion resisting centrifugal pump places outside the electrolyzer stationary tank.
Aforesaid permanent magnet or insulated wire bag 4, form horizontal magnetic field, also available air core solenoid is enclosed within and forms vertical magnetic field on the electrolysis cells section, increase and decrease permanent magnets or change it and arrange, or the size of current of change solenoid, alternative frequency etc., adjustable magnetic fields intensity not only, and can form evenly or non-uniform magnetic-field, static magnetic field or alternating magnetic field.
Aforesaid anode and negative electrode, for positive negative electrode to many to parallel way, its interelectrode distance is the extra small spacing of 1～10mm.
Described electrolytic solution 5 is AlCl
3The aqueous solution, anode and negative electrode are that aluminium sheet also can be aluminum strip or aluminium wire.
Described electrolytic solution 5 is FeCl
3The aqueous solution, anode and negative electrode are iron plate.
Concrete grammar of the present invention is as follows:
Certain density aluminum trichloride solution joined additional to be had in the electrolyzer in certain ad hoc structure or form magnetic field, its interelectrode distance is controlled at 1 ~ 10mm, electrode connection mode adopt many to anodic-cathodic to parallel way, electrolytic solution adopts powerful pump to force circulation at a high speed, electrolyte temperature is controlled at below 60 ℃, the pH value is controlled at subacidity (pH=4 ~ 6), make the positive and negative utmost point respectively with single aluminium (plate, bar, silk etc.), with bath voltage (momentary impulse voltage max) 2 ~ 9V, current density (momentary impulse current maxima) 3 ~ 10A/dm
2, alternation electrical impulse frequency 0.5 ~ 15Hz, electrolysis time 1 ~ 1.5 hour is adjusted between 0.02 ~ 0.2T with the complementary field magnetic induction, can prepare basicity thus and be 55% ~ 85% polymeric aluminum chlorides solution.
Embodiment 1
As shown in Figure 1 and Figure 2, at its stationary tank volume be additional synthetic glass electrolyzer (volume 60 * 20 * 150mm that magnetic field is arranged of 1000ml
3) the middle AlCl that adds 0.1mol/l
3Aqueous solution 500ml, implement electrolysis under the following conditions:
3 of electrode anode aluminium sheet (aluminium processing leftover bits) 15 * 150 * 15mm
3 of cathode aluminum plate (aluminium processing leftover bits) 15 * 150 * 15mm
Interelectrode distance: 8mm
Electrolysis power: component pulse-changing power
Circuit connects: parallel connection
Alternating impulse electric current frequency: 1HZ
The pulse duty time: 0 second
The instantaneous maximum value of pulsed voltage: about 9V
The instantaneous maximum value of pulsed current: 5A
Complementary field: horizontal non-uniform magnetic field
The strength of complementary field magnetic induction: 0.1T
Electrolyte temperature changes: 20 ~ 60 ℃
Electrolysis time: 90 minutes
To prepare the aqueous solution after electrolysis finishes and leave standstill detection again in 24 hours, index is: basicity 68%
Embodiment 2
As shown in Figure 1 and Figure 2, at its stationary tank volume be additional synthetic glass electrolyzer (volume 60 * 20 * 150mm that magnetic field is arranged of 1000ml
3) the middle AlCl that adds 0.1mol/l
3The aqueous solution.
3 of electrode anode aluminium sheet (aluminium processing leftover bits) 15 * 150 * 15mm
3 of cathode aluminum plate (aluminium processing leftover bits) 15 * 150 * 15mm
Interelectrode distance: 8mm
Electrolysis power: component pulse-changing power
Circuit connects: parallel connection
Alternating impulse electric current frequency: 3Hz
The pulse duty time: 0 second
The instantaneous maximum value of pulsed voltage: about 6V
The instantaneous maximum value of pulsed current: 6A
Complementary field:
Vertical direction pulsating magnetic field ripple frequency: 25Hz
Instantaneous maximum magnetic induction: 0.2T
Electrolysis time: 90 minutes
Electrolyte temperature changes: 20 ~ 60 ℃
To prepare the aqueous solution after electrolysis finishes and leave standstill detection again in 24 hours, index is: basicity 84.6%
Embodiment 3
As shown in Figure 1 and Figure 2, at its stationary tank volume be additional synthetic glass electrolyzer (volume 60 * 20 * 150mm that magnetic field is arranged of 1000ml
3) the middle FeCl that adds 0.1mol/l
3The aqueous solution.
3 of electrode anode iron plate (ironworking leftover bits) 15 * 150 * 15mm
3 of negative electrode iron plate (ironworking leftover bits) 15 * 150 * 15mm
Interelectrode distance: 8mm
Electrolysis power: component pulse-changing power
Circuit connects: parallel connection
Alternating impulse electric current frequency: 3Hz
The pulse duty time: 0 second
The instantaneous maximum value of pulsed voltage: about 6V
The instantaneous maximum value of pulsed current: 6A
Complementary field:
Vertical direction pulsating magnetic field ripple frequency: 25Hz
Instantaneous maximum magnetic induction: 0.2T
Electrolysis time: 90 minutes
Electrolyte temperature changes: 20 ~ 60 ℃
To prepare the aqueous solution after electrolysis finishes and leave standstill detection again in 24 hours, index is: basicity 80.2%
Be the flocculating property of checking goods of the present invention, and be convenient to and other preparation patented method lateral comparison, and consider that qualified flocculant of polymeric aluminium chloride result of use is better than this undisputable fact of common flocculation agent.So " Da Yu polymeric aluminum " (Al that has only adopted Chinese Tangshan-Dongchang company to produce
2O
317.6% basicity 50%) prepares aluminum chloride with the present invention and carry out the performance comparison experiment, can say something.
Experiment condition is as follows:
Experimental subjects: the residual active sludge of Sewage Plant after concentrating
Active sludge suspended sediment concentration: 10000mg/l
PH＝6.9
Experimental technique and step:
The degree that adopts the interpolation flocculation agent that the activated sludge dehydration strainability is improved is come the flocculating effect of the different flocculation agents of comparison.And dewatering performance of sludge is measured to measure its capillary water absorption time (CST).Under the identical situation of aluminium ion concentration, the degree Shaoxing opera that diminishes that adds the flocculation agent front and back active sludge capillary water absorption time is strong, and then the flocculence of this flocculation agent is good more.Adopting commercially available KL-1 type CST determinator is determining instrument.
Experimental procedure:
Respectively " Da Yu polymeric aluminum " prepared polymeric aluminum preparation 10 with the present invention
-5M is (with Al
3+Meter) flocculant solution of concentration is made flocculating effect relatively.Concrete steps are that the 0.2ml flocculation agent is dropped into the 50ml sludge concentration is in the active sludge of 10000mg/l, speed with 250 rev/mins on magnetic stirring apparatus stirred 1 minute, survey its CST value then, and to remove 6 CST mean values behind the maximum Schwellenwert in parallel 8 tests for being final data, experimental result is as follows:
| The flocculation agent kind | The Da Yu polymeric aluminum | The polymeric aluminum of the present invention's preparation |
| Activated sludge concentration (mg/l) | 10000 | 10000 |
| Active mud content ml | 50 | 50 |
| Primary sludge CST (second) | 145 | 145 |
| Flocculant concentration is (with Al 3+Meter) (M) | 10 -5 | 10 -5 |
| Flocculation agent addition (ml) | 0.2 | 0.2 |
| Add the mud CST (second) behind the flocculation agent | 50.8 | 45.6 |
| CST reduces amplitude (%) | 64.97 | 68.55 |
Can find out that by last result the polymeric aluminum product that the present invention produces is better than commercially available high-quality polymeric aluminum product on flocculating property.Because present device is small and exquisite, the electromechanical integration degree is high and overcome the polarization passivation phenomenon of electrolysis electrode fully, so an equipment can form the high efficient technology flow process of the high-purity high-efficiency polymerization aluminum chloride of preparation, and instant interpolation of instant at the scene preparation, therefore can save a large amount of medicament preparation, storage, transportation, capital construction and operational and administrative expenses, so have industrial utility value.
Claims (5)
1. method for preparing flocculation agent, adopt electrolytic process, electrolyte level is in electrolyzer, electrolytic solution is aluminum chloride or iron(ic) chloride, anode and negative electrode in electrolyzer, have been arranged alternately, it is characterized in that at magnetic induction be under 0.02 ~ 0.2T, pass to the big electric current of low pressure alternating impulse with electrical impulse frequency to electrolysis electrode and make polymerize aluminum chloride or poly-ferric chloride; Its electrical impulse frequency is 0.5 ~ 15Hz, and its pulse duty time is 0 second, and its output pulse waveform is a square wave, and its momentary impulse voltage max is 2 ~ 9V, and the momentary impulse current maxima is 3 ~ 10A/dm
2
2. the method for preparing flocculation agent according to claim 1 is characterized in that described electrolytic solution is aluminum chloride, and electrolyzer inner anode and negative electrode are aluminium sheet.
3. the method for preparing flocculation agent according to claim 1 is characterized in that described electrolytic solution is iron(ic) chloride, and anode and negative electrode are iron plate.
4. equipment of implementing claim 1 method, comprise electrolyzer (1), pole plate (2), electrolyte circulating pump (3), electrolytic solution (5), electrolytic solution (5) is positioned at electrolyzer (1), electrolytic solution is aluminum chloride or iron(ic) chloride, electrolyzer has been arranged alternately anode and negative electrode in (1), it is characterized in that electrolyzer (1) is provided with permanent magnet or insulated wire bag (4) on every side, anode is connected with the pulse alternating source with negative electrode.
5. the equipment of preparation flocculation agent according to claim 4 is characterized in that described anode and negative electrode, for positive negative electrode to many to parallel way, its anode and cathode spacing are 1～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138937 CN1226196C (en) | 2002-08-16 | 2002-08-16 | Method and apparatus for preparing flocculant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138937 CN1226196C (en) | 2002-08-16 | 2002-08-16 | Method and apparatus for preparing flocculant |
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| Publication Number | Publication Date |
|---|---|
| CN1408648A CN1408648A (en) | 2003-04-09 |
| CN1226196C true CN1226196C (en) | 2005-11-09 |
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|---|---|---|---|
| CN 02138937 Expired - Fee Related CN1226196C (en) | 2002-08-16 | 2002-08-16 | Method and apparatus for preparing flocculant |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010034B (en) * | 2010-12-21 | 2012-07-04 | 北京碧水源膜科技有限公司 | Preparation device of ferron used for water treatment and application method thereof |
| CN102826704B (en) * | 2012-09-20 | 2015-04-08 | 江苏艾特克环境工程有限公司 | Recycle system for recycled water |
| CN106191913A (en) * | 2016-08-29 | 2016-12-07 | 太仓市新星轻工助剂厂 | A kind of preparation method of aluminium polychlorid |
| CN114772624A (en) * | 2022-05-12 | 2022-07-22 | 西安益维普泰环保股份有限公司 | Method for producing high-purity aluminum chloride |
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2002
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