Device for efficiently producing solid polyaluminum chloride

Abstract

The invention discloses a device for efficiently producing solid polyaluminum chloride. The device comprises an acid tank system, a one-step reaction system, a two-step reaction system, a drum drying system and a crushing and packaging system; the one-step reaction system comprises a reaction tank, a reaction tank transfer tank, a flocculant preparation tank I, a main filter press and a one-step liquid tank; the two-step reaction system comprises a conditioning tank, a conditioning tank transfer tank, a cooling tower, a separation tank, a separate slag storage tank, a flocculant preparation tank II and a semi-finished product tank; the drum drying system comprises a drying liquid high-position tank, a drying drum and a finished product belt conveyor; the crushing and packaging system comprises a feeding hopper, a crusher, a bucket elevator, a finished product bin and a metering packaging system. The device for efficiently producing the solid polyaluminum chloride is capable of effectively controlling and reducing the content of insoluble substances in the reaction liquid, improving the filter pressing efficiency and the cooling effect and enhancing the yield and the quality of the final solid polyaluminum chloride product; besides, the production of the solid polyaluminum chloride is energy-saving and low in consumption.

Description

technical field [0001] The invention belongs to the technical field of polyaluminum chloride production, and relates to a device for efficiently producing solid polyaluminum chloride. 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, adsorption and precipitation, and finally generate [AL 2 (OH) 3 (OH) 3 ], s...

AI Technical Summary

Problems solved by technology

[0014] 1) In the first step of acid dissolution reaction and the second step of polymerization reaction, a large amount of insoluble matter will be produced, which is difficult to separate from the reaction solution, resulting in a serious excess of insoluble matter in the final solid polyaluminum chloride product;

[0015] 2) The drum drying system used, the process setting is not reasonable enough, resulting in high drying energy consumption costs, and the handling of solid polyaluminum chloride after drum drying is also time-consuming and laborious;

[0016] 3) The solid polyaluminum chloride obtained by drying will appear lumpy and hardened. If it is directly packaged and sold, it will affect the product quality image

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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