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Performance of polyaluminum chloride flocculant

High content water purification grade polyaluminum chloride, abbreviated as PAC, is a kind of multi-hydroxy, multi-core cationic inorganic polymer flocculant. The solid product has a yellow appearance. It can quickly form flocs with large alum flowers and fast settling speed. It can adapt to various water temperatures. It has good solubility and activity. It does not need to add alkaline additives. It can adapt to a wide range of pH values, has little corrosion to pipeline equipment, has high efficiency, uses less, has low cost, is simple to operate, and saves manpower, Material resources. It is widely used for the purification of drinking water and industrial water. The liquid is automatically added, and the pipe is not blocked for long-term use.

1、 Analysis on the cause of non sedimentation of suspended solids

Most of the polyaluminum chloride believe that the higher the content of aluminum oxide, the better the effect. However, when high content polyaluminum chloride is used in low turbidity sewage treatment, the suspended solids do not precipitate after being put into use. The main reason is not that the content is too high, but that the water quality of some sewage is too acidic. The higher the content of polyaluminum chloride, the more acidic the product is, and the inability to effectively react with it is one of the reasons; It is also possible that the suspended matter in the water is too light, and the high content of polyaluminum chloride can not effectively drive its precipitation down, which is also the main reason.

2、 Properties of polyaluminum chloride flocculant

(1. The water quality after polyaluminium chloride is better than that of aluminum sulfate coagulant, and the water purification cost is 15-30% lower than that.

(2. Polyaluminum chloride has the advantages of rapid formation and settling speed, and the treatment capacity is greater than that of traditional products such as aluminum sulfate.

(3. The alkalinity of water consumed by polyaluminum chloride is lower than that of various inorganic coagulants, so no or less alkali agent can be added.

(4. Polyaluminum chloride can be condensed in the range of pH 5.0-9.0 of the source water.

(5. Polyaluminum chloride has small corrosion resistance and good operating conditions.

(6. Polyaluminum chloride is better than aluminum sulfate.

(7. Polyaluminium chloride has little salt increase in water, which is conducive to ion exchange treatment and high-purity water production.

(8. The adaptability of polyaluminum chloride source water temperature is better than inorganic coagulants such as aluminum sulfate.

3、 Objects to be treated in coagulation stage

The objects to be treated in the coagulation stage of polyaluminum chloride are mainly suspended solids and colloids in water. Suspended solids can settle under their own gravity due to their large particle size; However, colloids have certain stability due to electrostatic pressure between colloidal particles, Brownian motion of colloids, hydration on the surface of colloidal particles, etc., so colloidal particles cannot be removed by natural sedimentation. The flocculate formed by the colloidal particles destabilized by high content polyaluminum chloride under certain water conservancy conditions is commonly known as alum. The process of making colloid unstabilized and unstabilized colloid aggregate or tiny flocs under Brownian motion is a condensation process. The process in which tiny flocs collide with each other under the action of hydrodynamic force to form large flocs is called flocculation process. Coagulation includes two processes of coagulation and flocculation, and the process from adding coagulant to forming alum is called coagulation. In the process of water purification, polyaluminum chloride with high content can coagulate and settle suspended solids and colloidal impurities, and is also quite effective in treating organic chroma substances, bacteria and viruses. When the suspended matter cannot be precipitated in the process of use, it is suggested to try to use polyaluminum ferric chloride or add polyaluminum ferric chloride to it.

Thank you for your attentionHenan aierfuke Chemical Co., Ltd：Focus on water treatment, only for the healthy world! Our company is committed toPolyaluminium chloride、Polyferric sulfateThe R & D, manufacturing and sales of series of water purification materials are willing to create success with our customers and friends.