CN1205133C

CN1205133C - Method for manufacturing composite coagulant of polyaluminium chloride and polymer of dimethyl diallyl ammonium chloride (DMDAAC) and its application

Info

Publication number: CN1205133C
Application number: CN 03126675
Authority: CN
Inventors: 胡勇有; 谢磊
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2003-05-27
Filing date: 2003-05-27
Publication date: 2005-06-08
Anticipated expiration: 2023-05-27
Also published as: CN1462727A

Abstract

The present invention provides a preparing method for composite coagulants of polyaluminium chloride and dimethyldiallyammonium chloride polymers. The present invention comprises the following steps: solid polyaluminium chloride is dissolved into PAC solution firstly, or PAC solution is directly adopted; then, dimethyldiallylammonium chloride polymer solution is added in the PAC solution under the conditions of mixing and heating, and the dimethyldiallylammonium chloride polymer solution and the PAC solution are cured until stable homogeneous solution is obtained. Composite coagulants prepared by the method can be widely suitable for the coagulation treatment process of industrial waste water and the domestic sewage of all industries, such as industrial and mining enterprises, restaurants, districts for living, barracks of armies, plants, hospitals, etc. The present invention has the advantages of simple fabricating technology, easy realization of industrialized production, high treatment efficiency, high removing speed, low use cost, broad range of application and good economic benefit.

Description

Polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant and manufacture method and application

Technical field

The present invention relates to water treatment and use the compound coagulant field, particularly a kind of polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant and manufacture method and application

Background technology

In the solid-liquid separation of town water and Industrial Wastewater Treatment and production process, coagulation process (mix, condense, flocculate) is to use one of the most general key link.Wherein, the quality of coagulating agent and result of use are of paramount importance factors of decision coagulation process success or failure.

The available coagulation agent generally comprises organic polymer coargulators such as inorganic coagulants such as Tai-Ace S 150, polymerize aluminum chloride, bodied ferric sulfate and polyacrylamide.

Inorganic coagulant generally all has stronger absorption charge neutrality ability, but its molecular weight is relatively low, in coagulation process, realize the limited in one's ability of bridge formation that bond between the colloidal solid thing, obtain ideal bridge formation flocculating effect and often need to add heavy dose of coagulating agent, cause handling the increase of remaining aluminium in the water of back or iron level, medicament expense increases.Cationic organic polymer generally all has the long molecular chain structure of big molecular weight and line style, has the ability of building bridge between very strong particulate matter, but be subjected to the restriction of manufacturing cost etc., the electric density of cation polymeric flocculant is not high, its charge neutrality ability relatively a little less than, and use cost is higher.

Usually in the Coagulation Method water treatment procedure, generally need take the composite use of inorganic coagulant and organic polymer coargulator, promptly will add independent inorganic coagulant or organic polymer coargulator respectively and do respectively at two or more snack made with traditional Chinese medicines that add in order to reach the purpose that highly effective coagulation is handled.Therefore, the equipment and the structures that need are more, the schedule of operation complexity, and to water quality and quantity variation situation greatly, difficulty is all compared in operation and adjustment.

In view of the foregoing, inorganic--the organic composite type coagulating agent can be given full play to the absorption charge neutrality effect of inorganic polymer can give full play to organic macromolecule bonding bridging action again, while dosing coagulant of needs in the coagulating treatment system just can reach the purpose of highly effective coagulation, it is all more favourable saving equipment and structures to be invested, simplified the operation, raises the efficiency, is easy to aspects such as adjustment, is a kind of up-and-coming novel coagulating agent.In the prior art, the existing report of the compound coagulant of inorganic coagulant and cationic organic high-molecular.The patent No. is the method that 00800622.9 Chinese invention patent " novel composition of iron(ic) chloride and dialkyl diallyl ammonium polymer and preparation method thereof " has provided mixing bussiness class iron salt solutions and dimethyl diallyl ammonium chloride polymkeric substance (P-DM), but this method is because molysite intensive hydrolysis tendency makes product stability relatively poor, the molecular weight of molysite is lower simultaneously, makes that the effect of product is not ideal.

Summary of the invention

The objective of the invention is to overcome the shortcoming of prior art, provide a kind of raw material be easy to get, simple to operate, water treatment efficiency is high, the polymerize aluminum chloride of low cost of manufacture and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant.

Another object of the present invention is to provide the preparation method of a kind of above-mentioned polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant.

A further object of the present invention is to provide the application of a kind of above-mentioned polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant.

Purpose of the present invention is achieved through the following technical solutions: this polymerize aluminum chloride comprises the following steps with the preparation method of dimethyl diallyl ammonium chloride polymkeric substance compound coagulant---at first the dissolving of polymerize aluminum chloride (PAC) solid is formed PAC solution or directly adopts PAC solution, add dimethyl diallyl ammonium chloride polymkeric substance (P-DM) solution then under the condition that stirs and heat in PAC solution, slaking is until obtaining stable homogeneous phase solution.

The preparation of described PAC solution be specially dissolved solids PAC to concentration be 0.1～20%, or directly adopt concentration range at 0.1～20% PAC solution; The concentration of described P-DM solution is 0.1～40%; Aforementioned ratio is weight percentage.

Al in the described PAC solid ₂O ₃Content is 5～30%, and basicity is 45～85%; Al in the described PAC solution ₂O ₃Content is 1～20 weight %, and basicity is 45～85%; Aforementioned ratio is weight percentage.

Described P-DM solution can be multipolymer (PDA) solution of dimethyl diallyl ammonium chloride homopolymer (PDM) solution or dimethyl diallyl ammonium chloride and acrylamide.

The rotating speed of described stirring is 100～1000r/m, and the condition of described heating is that controlled temperature is at 20～100 ℃.

In the trade effluent that polymerize aluminum chloride that is made by aforesaid method and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant are widely used in every profession and trade and the coagulating treatment process of sanitary sewage; As the coagulating treatment applicable to sewage or waste waters such as industrial and mining enterprises, restaurant restaurant, biotope, army's barracks and factory hospitals, application prospect is wider.

The action principle that this compound coagulant is disposed of sewage is: inorganic polymer coagulant all has stronger absorption charge neutrality ability as PAC, but its molecular weight is relatively low, in coagulation process, realize the limited in one's ability of bridge formation that bond between the colloidal solid thing, cationic organic polymer generally all has the long molecular chain structure of big molecular weight and line style, have the ability of building bridge between very strong particulate matter, but its charge neutrality ability relatively a little less than.This compound coagulant is optimized the forceful electric power neutralizing effect of inorganic polymer coagulant PAC and the bonding bridging action of organic polymer P-DM by the concrete proportioning of inorganic in the control compound coagulant and organic coagulating agent, thereby the highly effective coagulation that reaches sewage is handled.

This compound coagulant is compared with existing coagulating agent has following advantage:

1) this compound coagulant raw material is commercially available common PAC and P-DM, and the source is easy to get;

2) manufacture method is simple, is easy to realize suitability for industrialized production;

3) compare with simple use PAC, this compound coagulant processing efficiency height, removal speed is fast, and PAC medicament throwing amount reduces 10～70%, has therefore reduced water treatment running cost; Compare with simple use P-DM, the medicament unit cost reduces by 15～80%;

4) at concrete sewage disposal occasion, can carry out producing in serial form, treatment capacity is big, is applicable to that the sewage disposal of environment such as restaurant restaurant, biotope and factory hospital reaches to water treatment, and applied range is good in economic efficiency.

Embodiment

Below in conjunction with embodiment the present invention is done further concrete description, but embodiments of the present invention are not limited thereto.

Embodiment 1

(basicity is 55.1%, Al with water dissolution PAC solid ₂O ₃Content is 23.4%), formation concentration is 10% PAC solution; Get 1 kilogram of above-mentioned PAC solution, controlled temperature is at 30 ℃, at rotating speed is not stop to stir under the condition of 500r/m, simultaneously 1 kilogram 10% dimethyl diallyl ammonium chloride and the multipolymer of acrylamide (PDA) solution slowly added in the PAC solution; PDA add finish after, continue after stirring 60 minutes under the said temperature condition, to stop, the homogeneous phase solution of formation is at room temperature placed slaking and is promptly got to the end polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance complex coagulation agent solution more than 24 hours.This moment, each components contents was: PAC is 5%, and PDA is 5%, PAC: PDA=1: 1; Above-mentioned each ratio is weight percentage.

Embodiment 2

(basicity is 63.1%, Al with water dissolution PAC solid ₂O ₃Content is 13.1%), formation concentration is 20% PAC solution; Get 1 kilogram of above-mentioned PAC solution, controlled temperature is at 50 ℃, at rotating speed is not stop to stir under the condition of 1000r/m, simultaneously 1 kilogram 10% dimethyl diallyl ammonium chloride homopolymer (PDM) solution slowly added in the PAC solution; PDM add finish after, continue after stirring 30 minutes under the said temperature condition, to stop, the homogeneous phase solution of formation is at room temperature placed slaking and is promptly got to the end polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance complex coagulation agent solution more than 24 hours.This moment, each components contents was: PAC is 10%, and PDM is 10%, PAC: PDM=1: 1; Above-mentioned each ratio is weight percentage.

The complex coagulation agent solution that above-mentioned two embodiment are obtained is used for suspension liquid and sewage are carried out coagulating treatment, and the result is respectively shown in table 1 and table 2; Be the coagulating treatment result of kaolin suspension liquid (the pH value is 7.2, and temperature is 20 ℃) shown in the table 1 wherein to 300mg/L; Shown in the table 2 is coagulating treatment result to the Reactive Brilliant Red K-2BP waste water from dyestuff of 100mg/L; By table 1 and table 2 as seen, this compound coagulant can carry out coagulating treatment to sewage and waste water effectively, and fast with respect to only adopting PAC to handle its removal speed, processing efficiency is higher.

Table 1

Delivery turbidity

Dosage PAC (mg/L) raw water turbidity (NTU)

(NTU)

PAC 10.2 210 11.2

Compound coagulant 1 ^#10.2 210 4.3

Compound coagulant 2 ^#10.2 210 2.2

Table 2

Dosage PAC (mg/L) clearance %

PAC 25.3 75

Compound coagulant 1 ^#25.3 84

Compound coagulant 2 ^#25.3 92

Claims

1, the preparation method of a kind of polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant, it is characterized in that comprising the following steps: earlier the dissolving of polymerize aluminum chloride solid being formed PAC solution, described PAC solution be dissolved solids PAC to concentration be 0.1～20%; Or directly adopt concentration range at 0.1～20% PAC solution; The copolymer solution that under the condition that stirs and heat, in PAC solution, adds dimethyl diallyl ammonium chloride and acrylamide then, the concentration of described copolymer solution is 0.1～40%, the rotating speed of described stirring is 100～1000r/m, and the condition of described heating is that controlled temperature is at 30～100 ℃; Slaking is until obtaining stable homogeneous phase solution; Aforementioned ratio is weight percentage.

2, the preparation method of polymerize aluminum chloride according to claim 1 and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant is characterized in that: Al in the described PAC solid ₂O ₃Content is 5～30%, and basicity is 45～85%; Al in the described PAC solution ₂O ₃Content is 1～20%, and basicity is 45～85%; Aforementioned ratio is weight percentage.

3, a kind of polymerize aluminum chloride and dimethyl diallyl ammonium chloride polymkeric substance compound coagulant by claim 1 or 2 described method preparations.

4, a kind of by claim 1 or the polymerize aluminum chloride of 2 described method preparations and the application of dimethyl diallyl ammonium chloride polymkeric substance compound coagulant, it is characterized in that: the coagulating treatment process that directly applies to trade effluent and sanitary sewage.