Polyaluminum ferric chloride Polyaluminum ferric chloride (PAFC) is an inorganic polymer coagulant made from the coagulation and hydrolysis of aluminum salts and iron salts. Based on the principle of synergy, it is added with elemental iron ions or ferric oxide and other compounds containing A new type of coagulant made from iron compounds.

It combines the respective advantages of aluminum salts and iron salts, significantly improves the morphology of aluminum ions and iron ions, and relatively increases the degree of polymerization. Take the advantages of aluminum and iron coagulants for air flotation operations to improve the coagulation performance of polyaluminum chloride; use additives or other coagulants to effectively purify high-turbidity water and low-temperature low-turbidity water.

Properties and advantages of polyaluminum ferric chloride:
The main manifestations are:
1. Fast hydrolysis and weak hydration. The alum flowers formed are dense and settle quickly. It is less affected by changes in water temperature and can meet the requirements for generating shear force during the flow process.
2. The solid product is brown or reddish-brown powder, which is easily soluble in water.
3. It can effectively remove aluminum ions in source water and residual free aluminum ions in water after aluminum salt coagulation.
4. Wide application range, domestic drinking water, industrial water, domestic water, domestic sewage and industrial sewage treatment, etc.
5. The dosage is small, the treatment effect is relatively good, and the cost is saved by 10-20% compared with other coagulants.

6. The usage, packaging purposes and precautions are basically the same as those of polyaluminium chloride.

How to use polyaluminum ferric chloride and precautions:
Since raw water has different properties, on-site debugging or beaker testing should be carried out according to different conditions to obtain the usage conditions and dosage to achieve the ideal treatment effect.
1. Before use, put this product into the alum-dissolving tank at a certain concentration (10-30%), pour in tap water and stir to fully hydrolyze it, let it stand until it turns into a reddish-brown liquid, then dilute it with water to the required concentration and add coagulation. . Water plants can also add 2-5% directly, and industrial wastewater treatment can directly add 5-10%.
2. The dosage can be determined according to the nature of the raw water through production debugging or beaker experiments to determine the appropriate amount of alum flowers. The water production plant can use the dosage of other chemicals originally used as a reference. Under the same conditions, this product and solid polychlorination The amount of aluminum used is roughly the same, 1/3-1/4 of the amount of solid aluminum sulfate. If the original liquid product is used, it can be determined based on the calculation of the corresponding pharmaceutical concentration. Roughly based on the weight ratio of 1:3.
3. When in use, pump the above-prepared chemical solution into the metering tank, and coagulate the chemical solution with the raw water through metered addition.

4. Under normal circumstances, it is prepared and used on the same day. Tap water is required for dispensing. A slight sediment is normal.

Uses of polyaluminum ferric chloride:
Polyaluminum ferric chloride has a wide range of applications: it is used in domestic drinking water, industrial water, domestic water, domestic sewage and industrial sewage treatment. Polyaluminum ferric chloride has obvious effects on the purification treatment of domestic drinking water and various industrial water.
Packaging and storage of polyaluminum ferric chloride:

Polyaluminum ferric chloride products are packed in 25kg woven bags lined with plastic film. It should be placed in a cool and dry place indoors, away from the sun and rain, and should not be mixed with toxic, flammable or perishable items.

Polyaluminum ferric chloride coagulation process:
Polyaluminum ferric chloride coagulation process Hydraulic conditions and alum bloom formation conditions in the three stages of the coagulation process.
1. Coagulation stage: It is the process in which the chemical liquid is injected into the coagulation tank and the raw water quickly coagulates to form fine alum flowers in a very short time. At this time, the water body becomes more turbid, which requires the water flow to produce intense turbulence. In the beaker experiment, it is advisable to stir quickly (250-300 rpm) for 10-30 seconds, generally no more than 2 minutes.
2. Flocculation stage: It is the process in which alum flowers grow and become thicker. It requires an appropriate degree of turbulence and sufficient residence time (10-15 minutes). In the later stage, a large number of alum flowers can be observed to gather and slowly sink, forming a clear layer on the surface. In the beaker experiment, stir at 150 rpm for about 6 minutes and then at 60 rpm for about 4 minutes until it becomes suspended.
3. Settling stage: It is a floc settling process carried out in a settling tank, which requires slow water flow. In order to improve efficiency, an inclined tube (plate type) settling tank is generally used (it is best to use air flotation to separate flocs), and a large amount of coarse alum The flowers are blocked by the wall of the inclined tube (plate) and deposited at the bottom of the pool. The water in the upper layer is clear water. The remaining alum flowers with small particle size and low density slowly descend while continuing to collide with each other and form a large amount. In the later stage, the residual turbidity is basically constant. For the beaker experiment, it is recommended to stir slowly at 20-30 rpm for 5 minutes, then let it sit for 10 minutes, and measure the remaining turbidity.
4. Strengthen filtration, mainly by rationally selecting the filter layer structure and filter aids to improve the removal rate of the filter. It is an important measure to improve water quality.
5. This product is used in the treatment of environmental protection and industrial wastewater. The usage method is roughly the same as that in water plants. It has a very good effect on the treatment of raw water with high color, high COD and BOD, supplemented by auxiliaries.
6. Enterprises that use chemical coagulation method do not need to make major modifications to the original equipment. They only need to add a dissolved alum tank to use this product.
7. This product must be stored in a dry, moisture-proof, and heat-proof place (<80oc, do not damage the packaging, the product can be stored for a long time). < p="">
8. This product must be dissolved before use. Dissolution equipment and dosing facilities should be made of corrosion-resistant materials.