Flocculant for sand washing field are mainly used for general industrial wastewater treatment and some sewage flocculation with low requirements for flocculants, sand and gravel wastewater, coal washing wastewater accumulation, etc. The product has the characteristics of easy dissolution and fast dispersion. Sand washing waste water refers to the waste water produced by the sand washing stone production enterprises during the sand washing process. The primary pollution factors of these waste waters are chemical oxygen demand and suspended matter, and the content of suspended matter*, the concentration is about 3000mg/L . The main purpose of sand washing wastewater is to treat the wastewater that occurs in the mine sand washing operation. The sand washing wastewater treatment plan is to add a special mud accumulation flocculant for sand washing wastewater treatment. The accumulated sand washing wastewater can be recycled. The mine sand washing plant Waste water refers to the waste water generated by the washed sand and gravel production enterprises during the production process. The primary pollution factors of these waste water are chemical oxygen demand and suspended matter, and the content of suspended matter is large, with a concentration of about 3000mg/L. It wastes a lot of water resources, pollutes water quality, affects road traffic, affects the normal start of life of nearby residents, and even intensifies social conflicts and adds disharmony to society.
The sand washing wastewater treatment mud accumulating agent can flocculate and accumulate the suspended matter in the mud water before it can be recycled. In the process of coagulation and sedimentation, it is necessary to use sewage treatment flocculants. The composition of fine particles and water in the mud and mud water enter the formation through the formation gap. Assuming that the mud and mud water does not pass through the treatment, as the time increases, the formation gap is filled with fine particles more and more, the permeability coefficient is getting smaller and smaller, so the mud and mud water The requirements are handled separately. Regarding the treatment of mine mud water, anionic flocculants are generally used, and some mine mud water is messy and may require a weak cation type. Mine sewage treatment flocculant dissolves in water with a lot of charge, and can well flocculate with mud clay, flocculant can damage the stability of mud water, make mud particles quickly coagulate and settle from the water, so as to reach the mud water effect.
Application of Flocculant for sand washing field treatment: 1. Dissolve solid flocculant into water to 0.2%-0.3% concentration aqueous solution before use. 2. For dilution, use water without suspended impurities. It is recommended to use tap water. 3. Dilution and agitation can use mechanical agitation, the rotation speed is preferably about 200 rpm; gas can also be agitated. 4. The dosage of flocculant in sewage treatment is generally about 2 kg/ton of sludge. In order to achieve the effect and economic benefit, it should be confirmed through experiments.
Function: It can make the fine particles suspended in the mud wastewater of the sand washing field difficult to naturally settle to form flocs, settle quickly, and improve the separation efficiency. Because the particle size of suspended particles in the mud wastewater of the sand washing plant is very small and not easy to settle, these properties determine the serious pollution and difficulty of treatment of this type of wastewater. This product solves the problems of slow sedimentation and unclear water quality. It can effectively clarify the sewage, make the fine particles in the mud water quickly clump and settle, improve the efficiency of the sedimentation tank, and thus save water and prevent pollution. The effect further improves the company's efficiency.
Currently, the process flow of sand-making sand in our country is: crushing pebbles or ores by crushing machinery, washing the sand through sand washing equipment, and obtaining fine sand with less mud content. This process produces a large amount of sewage. The main pollutant is sediment. Among them, the sludge suspended in the water is difficult to settle, and the direct discharge is serious to the environment. The sedimentation tank method currently used in the industry covers a large area and takes a long time to process. The extraction of sediment is not easy, the method of transportation by tank trucks is expensive, and the problem cannot be solved fundamentally. In recent years, most of this process system has been adopted: mud water collection sedimentation tank, secondary sedimentation tank, clear liquid tank, mud sand separation system, dosing system, drainage system, and slag discharge system. Its working principle is: the mud water is collected into the sedimentation tank through the pipeline, and pretreated by the mud dehydrator to remove most of the fine sand and part of the mud in the mud water, and the filtrate enters the secondary sedimentation tank through the drainage system. The mud water in the second settling tank is suspended mud, and the specific gravity difference with the water is very small. It must be treated with a flocculant. After the flocculant is added to the mud water, the mud sand removal rate after treatment by the dehydrator reaches more than 95%. The water can be directly returned to the sand washing system to achieve zero discharge.