First, the product overview:
The advantages of polyaluminum chloride aluminum and aluminum salts are obvious, and the forms of aluminum ions and iron ions are obviously improved, and the degree of polymerization is greatly improved. It is a kind of inorganic polymer coagulant which is hydrolyzed by aluminum salt and iron salt. According to the synergistic principle, a new type of high-efficiency coagulation is obtained by adding elemental iron ions or combining iron oxide with other iron-containing compounds. Agent. Take aluminum and iron coagulant for their advantages in air flotation operation, improve the coagulation performance of polyaluminum chloride; the effect of purification of high turbidity water and low temperature and low turbidity water is particularly obvious, without adding alkaline additives or Other coagulants.
Second, the technical description:
[Product Name] Polyaluminum Ferric Chloride Abbreviation (Composite Aluminum Iron)
[English name] poly aluminum ferric chloride abbreviation (PAFC)
[Technical Standards] Product quality in line with national GB/T22627-2008 standard
[Product Color] Reddish Brown
Third, technical parameters:
State Relative density (20 °C) ≥ PH value (1% aqueous solution) AL2O3 content% Fe2O3 content Salt base degree % Water insoluble content% ≤ As content% ≤ Mn content% ≤ Pb content% ≤ Hg content% ≤ SO42-content %≤
Liquid 1.19 3.5-5.0 8.0-12.0 1.0-4.0 60-95 0.5 0.0003 0.045 0.001 0.00002 3.5-9.6
Solid 3.5-5.0 27.0-32.0 2.0-6.0 60-95 1.5 0.0006 0.01 0.003 0.00006 3.5-10
Fourth, product characteristics:
Polyaluminum chloride is highly soluble in water and can be used in domestic drinking water, industrial water, industrial wastewater and domestic sewage treatment. In addition to the reduction of residual turbidity chromaticity, the coagulation effect also has the characteristics of floc formation block, high adsorption performance, good sludge filtration and dewatering performance, especially when dealing with high turbidity water, low temperature and low turbidity water. The treatment effect is better than that of alum, polyaluminum chloride, polyferric sulfate and iron trioxide. Among them, the effect of purifying and treating low-temperature and low-turbidity water is particularly obvious, and the effect that the alkaline auxiliary agent and other coagulating agents cannot match can be eliminated.
V. Product use:
Widely used in the purification of drinking water, industrial water, various industrial wastewater, urban sewage, sludge dewatering, etc.
Sixth, application characteristics and advantages:
1. New, high-quality, high-efficiency iron salt inorganic polymer flocculant;
2. Excellent coagulation performance, dense flowering and fast settling speed;
3. Excellent water purification effect, good water quality, no harmful substances such as aluminum, chlorine and heavy metal ions, no water phase transfer of iron ions, non-toxic, harmless, safe and reliable.
4. Removal of turbidity, decolorization, deoiling, dehydration, sterilization, deodorization, algae removal, removal of COD, BOD and heavy metal ions in water are significant.
5. The pH range of the adapted water body is 4-11, and the optimum pH range is 6-9. The pH value and total alkalinity of the raw water after purification are small, and the corrosion to the processing equipment is small;
6. It has remarkable effects on micro-pollution, algae-containing, low-temperature and low-turbidity raw water purification, and is especially effective for high turbidity raw water purification.
7. The dosage is low, the cost is low, and the processing cost can be saved by 20%-50%.
Seven, use methods and precautions
Due to the different nature of raw water, it should be debugged on site or beaker tested according to different conditions to obtain suitable conditions of use and suitable dosage to achieve good treatment results.
1. Before use, put the product into a solvent bath at a certain concentration (10-30%), mix it with tap water to fully hydrolyze it, let it stand until it is reddish brown liquid, then dilute with water to the desired concentration and add coagulation. . The water plant can also be directly dosed with 2-5%, and the industrial wastewater treatment is directly formulated into 5-10%.
2, the determination of dosage, according to the nature of raw water can be determined by production commissioning or beaker experiment depending on the amount of sputum flower formation, the water plant can use the other amount of the original as a reference, under the same conditions, the product and solid polymerization chlorination The amount of aluminum is roughly equivalent, which is 1/3-1/4 of the amount of solid aluminum sulfate. If the original product is a liquid product, it can be calculated according to the corresponding drug concentration. It is roughly based on a weight ratio of 1:3.
3. When using, the above prepared chemical liquid is pumped into the measuring tank, and coagulated with the raw water by the metering dosing liquid.
4. Under normal circumstances, it will be used on the day of preparation. The dispensing requires tap water. A slight sediment is normal.
Eight, polyaluminium chloride iron coagulation process
The hydraulic conditions of the three stages of the polymerization of aluminum chloride iron and the formation of silk flowers.
1. Condensation stage: It is a process in which the chemical liquid is injected into the coagulation tank and rapidly coagulated with the raw water to form a fine sputum flower in a very short time. At this time, the water body becomes more turbid, and it requires the water flow to generate intense turbulence. In the beaker experiment, it should be stirred quickly (250-300 rpm) for 10-30 seconds, generally no more than 2 minutes.
2. Flocculation stage: It is the process of thickening and growing of silk flower, which requires proper turbulence and sufficient residence time (10-15min). Later, it can be observed that a large number of scented flowers gather slowly and form a clear layer. The beaker experiment was first stirred at 150 rpm for about 6 minutes and then stirred at 60 rpm for about 4 minutes until it was in suspension.
3. Settlement stage: It is the flocculation sedimentation process carried out in the sedimentation tank, which requires slow water flow. In order to improve the efficiency, the inclined tube (plate type) sedimentation tank is generally used (the floc can be separated by air floatation method), and a large number of coarse alfalfa flowers are used. It is blocked by the inclined tube (plate) wall and deposited on the bottom of the pool. The upper layer of water is clarified water. The remaining small diameter and small density of the scented flowers slowly descend, and continue to collide with each other, and the remaining turbidity is basically not change. The beaker experiment should be stirred slowly for 20 minutes at 20-30 rpm, and then allowed to stand for another 10 minutes to measure the turbidity.
4. Intensified filtration, mainly to rationally select the filter layer structure and filter aid to improve the removal rate of the filter, which is an important measure to improve water quality.
5. This product is applied to the treatment of environmental protection and industrial wastewater. The method of use is basically the same as that of the water plant. The raw water treatment of high chroma, high COD and BOD is supplemented with additives.
6. For enterprises adopting chemical coagulation method, the original equipment does not need to be greatly modified, and only need to add a solvent pool to use this product.
7. This product should be stored in a dry, moisture-proof, heat-protected place (<80oC, do not damage the packaging, the product can be stored for a long time).
8. This product must be dissolved before use. Dissolving equipment and dosing facilities should be made of corrosion-resistant materials.
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