Efficient filter pressing cooled, environmental-friendly and clean liquid polyaluminium chloride production device

Abstract

The invention provides an efficient filter pressing cooled, environmental-friendly and clean liquid polyaluminium chloride production device comprising an acid tank system, a one-step reaction system, a two-step reaction system, a residue treatment system and a tail gas absorption system, wherein the one-step reaction system comprises a reaction tank, a reaction tank transfer pool, a flocculant preparation tank I, a main filter press and a one-step liquid pool, the two-step reaction system comprises a conditioning pool, a transfer pool of the conditioning pool, a cooling tower, a separation pool, a separated residue storage pool, a flocculant preparation tank II and a semi-finished product pool, the residue treatment system comprises a residue washing pool, a residue filter press, a residue dryer and a wastewater pool, and the tail gas absorption system comprises a tail gas absorption tower and a gas collection cover arranged above the main filter press. By adopting the device provided by the invention, the content of insoluble substances in the reaction liquid is effectively controlled and reduced, the filter pressing is sufficient, the cooling is fast, the yield and quality of liquid polyaluminium chloride are improved, and the filter residues, wastewater and waste gas generated in the production process are treated and comprehensively utilized, thereby saving the production materials and reducing the emission.

Description

technical field [0001] The invention belongs to the technical field of polyaluminum chloride production, and in particular relates to a high-efficiency filter press cooling and environmentally friendly and clean liquid polyaluminum chloride production device. Background technique [0002] Polyaluminum chloride, commonly known as water purifying agent, also known as polyaluminum chloride, referred to as polyaluminum, English name PAC; it is a cationic inorganic polymer flocculant of polyhydroxyl and multinuclear complexes, and the appearance of solid products is red Brown, yellow or white solid powder, its chemical formula is [AL 2 (OH) n CL 6-n ] m (In the formula, 1≤n≤5, m≤10), where m represents the degree of polymerization, n represents the degree of neutrality of the PAC product, is easily soluble in water, has strong bridging adsorption, and is accompanied by electrolysis during the hydrolysis process. Physical and chemical changes such as chemistry, coagulation, ad...

AI Technical Summary

Problems solved by technology

Although the existing cooling towers can meet the requirements of use to a certain extent, because the cooling medium is filled in the entire cooling medium cavity, its circulation velocity is relatively slow, and the temperature of the cooling medium in different regions of the cooling medium cavity is also different. Causes uneven cooling

In addition, when the fluid substance to be cooled is a gaseous substance or liquid substance with a high flow rate, the set cooling effect cannot be achieved due to the short contact time between the fluid substance to be cooled and the cooling medium

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