Polyaluminium chloride is now widely used in coal washing plants. Its main features are strong water treatment ability, fast speed, and effluent water quality that can meet discharge standards. At the same time, due to its low price (compared to large water treatment equipment), it has gradually spread to many coal washing plants. From the perspective of our customers, most of the coal ash in the coal washing water can be recovered through sedimentation. At the same time, in some slightly polluted water, polyaluminium chloride can realize water recycling. Therefore, the treatment ability of coal washing water with polyaluminium chloride can greatly alleviate the environmental pressure caused by the discharge of local industrial wastewater.
Treatment of coal washing wastewater by polyaluminium chloride: The effect of polyaluminium chloride is to destabilize the particles in the water and then condense them after compressing the double electric layer. In this process, the dosage of polyaluminium chloride must be based on the requirement of forming the desired initial particles. Its dosage affects the effective density e, particle size dp and effluent turbidity SSt of the aggregate, and then affects the treatment of coal washing wastewater. With the increase of polyaluminium chloride dosage, the effective density e of coal slime aggregate decreases. This is because the cohesion of coal slime particles increases with the increase of PAC dosage, which is easy to generate high-multiple particles. Such particles have a large porosity, which leads to the formation of coal slime. The effective density e of particles decreases; the effluent turbidity SSt decreases significantly with the increase of PAC dosage, and the effluent changes from turbid to clear. When PAC is added to 2.6 mg/L, SSt changes very little and basically tends to be stable. The increase of PAC makes the destabilization degree of fine particles in coal washing wastewater increase, the cohesion increases, and SSt decreases sharply. When the PAC dosage reaches a certain value, most of the particles in the wastewater are almost completely destabilized and coagulated, achieving the best effect. Further increasing the dosage of polyaluminium chloride does not make much sense. Moreover, in practical projects, considering saving the cost of reagents, the dosage of PAC should be controlled.
The main products of flocculant manufacturer Xinhuan Water Treatment are:
White polyaluminium chloride (food grade), drinking grade polyaluminium chloride, industrial grade polyaluminium chloride, anionic polyacrylamide, cationic polyacrylamide, nonionic polyacrylamide, petroleum recycling polyacrylamide, oil recovery polyacrylamide, polyacrylamide, polymer flocculant polymer flocculation coagulant, polymeric ferrous sulphate, polyferric aluminium chloride and other water treatment chemicals. Welcome customers to write to us to negotiate business! Tel/WhatsApp：+8619003830067 Email：joanna@xhwtm.com Contact:Joanna
