Industrial-grade drum polyaluminum

4dhcpmingchen

Your location Home: -> Products: -> Water Treatment Series -> Polyaluminium Chloride -> Industrial-grade drum polyaluminum

【Origin Pic】

【Application Scope】

Mainly used for industrial water supply, wastewater, sewage, and sludge treatment. It is especially suitable for treating high-turbidity wastewater from papermaking, chemical, printing and dyeing, laundry, electroplating, mining, and tanning industries.

【Product Characteristics】

Appearance: Earth yellow, tan, or reddish-brown solid granules or powder.

Aluminum Oxide (Al2O3) content: Available in specifications such as 20%, 23%, 26%, 28%, and 30%.

Basicity: 60%-95%

pH value: 3-5 (10% aqueous solution)

【Features and Properties】

This product possesses strong bridging adsorption properties. During the hydrolysis process, physical and chemical processes such as coagulation, adsorption, and precipitation occur simultaneously. Industrial-grade polyaluminum chloride is non-corrosive to equipment, and its water purification effect is significant. It can effectively remove color, SS (Suspended Solids), COD, BOD, and heavy metal ions from water. It has a relatively wide suitable pH range (5-9), and causes minimal decrease in pH value and alkalinity of the treated water. It can maintain stable precipitation effects even at low water temperatures.

[Artwork] [BACK]

Industrial-grade drum polyaluminum

Product Description

Polyaluminum Chloride (PAC), referred to as Poly-aluminum, is a water-soluble inorganic polymer between AlCl3 and Al(OH)3. The general chemical formula is [Al2(OH)nCl6-n]m, where "m" represents the degree of polymerization and "n" indicates the neutrality of the product. When n=1～5, it forms a high-charge polymeric ring chain with a Keggin structure. It provides high-level electro-neutralization and bridging effects for colloids and particles in water and can strongly remove toxic substances and heavy metal ions. Due to its stable properties, it is commonly used as a new type of water purification material and coagulant, widely applied in the purification of industrial wastewater and urban sewage.

Preparation Method

Dissolve the solid product in water at a ratio of 1:3 to form a liquid, then dilute it with 10-30 times more water to the required concentration. For example, to prepare a 10% PAC solution in a 1-ton mixing tank, first fill the tank with 1/3 of water, start stirring, then add 100kg of solid PAC. After full dissolution, continue adding water to the 1-ton mark and stir evenly.

Usage Method

The following are the common usage methods for PAC:

1. Preliminary Dilution: Usually mix PAC with clean water in a specific ratio to prepare a solution with a concentration of 5%-10%.

2. pH Control: Depending on the water quality, PAC can be used in weakly acidic or weakly alkaline environments. The effective pH range is 5-9, with the optimal pH being 6-8.

3. Dosage Application: Add the diluted PAC solution to the water to be treated in an appropriate manner. The dosage varies depending on the degree of water pollution and treatment requirements (conduct a small-scale test beforehand to determine the basic dosage, then fine-tune according to actual conditions).

4. Mixing: After adding the PAC solution, the water must be rapidly mixed to ensure the agent is evenly dispersed and fully contacts the colloids and suspended solids in the water. Rapid mixing time is approximately 10-30 seconds, generally not exceeding 2 minutes.

5. Sedimentation and Separation: Allow the mixed water to stand for a period, typically 30 minutes to an hour, to fully achieve sludge-water separation (to accelerate floc sedimentation, it is often used in conjunction with polyacrylamide PAM).

Precautions

1. As the PAC solution is slightly corrosive, the dissolution tank or mixing tank requires anti-corrosion measures or must be made of corrosion-resistant materials.

2. Do not mix PAC from different manufacturers or different models.

3. Use regular tap water to dissolve PAC; do not use sewage.

4. The shelf life of solid PAC is generally 12 months; it can still be used after absorbing moisture.

5. If the flocs settle slowly or the water becomes turbid after adding PAC, check if the quality of the agent or the dosage ratio is appropriate.

Packaging and Storage

Solid PAC should be covered during transportation to avoid rain and moisture, and the packaging must remain intact with clear labeling. The solid is packaged in 25kg bags with an inner layer of plastic film and an outer layer of plastic woven bags. The product should be stored in a dry, ventilated, and cool indoor place, avoiding moisture. It must not be stored together with flammable, corrosive, or toxic substances.