Tail gas waste heat utilization device in aluminium polychlorid production and method

Abstract

The invention relates to a high-efficiency energy-saving environment-protection preparation device of high-purity nanometer polymeric aluminium, which is composed of a liquid material generation part and a liquid material drying part; the preparation device is characterized in that: a liquid material generation agitated reactor is a high-efficiency agitated reactor 3, the heat of a membrane distillation device 8 for liquid material concentration is provided by waste heat of circulating water of a sleeve layer in the high-efficiency agitated reactor 3, and a tail gas absorption tower 12 is provided with a tail gas remainder recovery and waste heat re-utilization device; the high-efficiency energy-saving environment-protection preparation method comprises liquid material generation process and liquid material drying process; the method is characterized in that: the liquid material generation process comprises nitrogen adding technology and agitated reactor waste heat utilization technology; the liquid material drying process comprises the tail gas waste heat utilization technology; the invention has the advantages that the equipment structure is simplified to be convenient for control; the reaction efficiency of the nitrogen adding is improved, in the concentration process, the circulating water in the sleeve layer is utilized to provide heat, the tail gas remainder and waste heat are utilized, the energy source is saved, the discharging rate is improved, waste gas and waste heat discharge is reduced, the pollution is reduced and the cost is reduced.

Description

(1) Technical field [0001] The invention relates to an energy-saving and environment-friendly chemical device and method, in particular to a device and method for utilizing the waste heat of tail gas in the production of polyaluminum chloride. (2) Background technology [0002] In the production process of the common polyaluminum chloride production device, the chemical reaction efficiency is not high, and the waste is very large. One of them is that in the process of drying aluminum chloride finished products, the atomized tail gas still contains the effective substance of atomized aluminum chloride, and the tail gas discharges form serious pollution, which reduces the output rate of finished products, increases the product cost, and causes a large amount of pollution. Waste; second, the temperature of the exhaust gas is as high as 80 degrees or more, if it is directly discharged, a lot of waste heat will be lost. Therefore, it is necessary to reform and process the polyal...

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Problems solved by technology

[0003] The purpose of the present invention is to design a device and method for utilizing tail gas waste heat in the production of polyaluminum chloride, so as to solve the problem of fully utilizing the tail gas of the polyaluminum chloride preparation device

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