A reaction device for producing polyaluminium chloride

Abstract

A reaction device for producing polyaluminium chloride is disclosed. The device comprises a first-step reaction system and a second-step reaction system. The first-step reaction system comprises a reaction tank, a reaction tank transit tank, a flocculant preparation tank I, pressure filters and first-step liquid tanks. The second-step reaction system comprises a regulating tank, a regulating tank transit tank, a cooling tower, a separation tank, a separation residue storage tank, a flocculant preparation tank II and a semi-finished product tank. According to the device, insoluble substances produced in reactions are separated through coagulating sedimentation and pressure filtration, thus effectively controlling and reducing the content of the insoluble substances in the reaction liquid, increasing the yield of liquid polyaluminium chloride, improving quality of the liquid polyaluminium chloride, and allowing pressure filtration to be more sufficient and higher in efficiency.

Description

technical field [0001] The invention belongs to the technical field of polyaluminum chloride production, and relates to a polyaluminum chloride production reaction 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 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 ], so as to achieve...

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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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