An acid dissolution reaction system for efficiently producing polyaluminium chloride

Abstract

The invention discloses an acid dissolution reaction system for efficiently producing polyaluminium chloride. The acid dissolution reaction system comprises an acid tank system and a first-step reaction system. The acid tank system comprises a sulfuric acid storage tank system and a hydrochloric acid storage tank system. The first-step reaction system comprises a reaction tank, a transit tank of the reaction tank, a flocculant preparation tank, pressure filers and first-step liquid tanks. The transit tank of the reaction tank, the flocculant preparation tank, the pressure filers, and other devices are disposed in the first-step acid dissolution reaction system, and insoluble matters produced in acid dissolution reactions can be separated through coagulating sedimentation and pressure filtration, thus effectively controlling and reducing the content of the insoluble matters in a first-step liquid, improving pressure filtration effects, increasing the yield of a polyaluminium chloride product and improving quality of the polyaluminium chloride product. The acid dissolution reaction system is also provided with an automatic monitoring control system and parallel pipelines, thus achieving automatic monitoring control, and the parallel pipelines are overhauled step by step, thus achieving continuous and automatic production.

Description

technical field [0001] The invention belongs to the technical field of polyaluminum chloride production and relates to an acid-soluble reaction system for polyaluminum chloride production. 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 PAC products, 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, adsorption and precipitation, and finally generate [AL 2 (OH) 3 (OH) 3 ],...

AI Technical Summary

Problems solved by technology

The existing filter press generally only uses the adjustment of the feed pressure as the pressure source of the filter press, although it can meet the requirements of use, but with the development of the filter press equipment, the filter area of ​​the filter press continues to increase, and the filter plate The number is also increasing, which makes the length of the filter press continue to increase. If the pressure of the filter press is only provided by increasing the feed pressure of the feed pump, the filter cake cannot be pressed for a long time, and the production efficiency will be reduced.

[0015] In addition, because the length of the filter press continues to increase, it is impossible to ensure that all the filter chambers can be opened after the filter press is completed, resulting in that the filter residue cannot be removed smoothly. It is necessary to manually open the unopened filter chambers one by one and then remove the filter residue. Not only wasting manpower, but also reducing production efficiency

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