Device and method for preparing high-purity nano polyaluminium chloride with high efficiency, energy saving and environmental protection

Abstract

The invention relates to a device for utilizing the residual heat of tail gas in the production of polyaluminium chloride, which comprises a drying part of the liquid material of the polyaluminium chloride. The device is characterized in that the drying part of the liquid material of the polyaluminium chloride is provided with a drying tower 1 and a tail gas absorption tower 2, wherein a device for recovering the residual material of the tail gas and recycling the residual heat is arranged in the tail gas absorption tower 2; the utilization method of the device comprises a drying technology and a tail gas absorption technology. The method is characterized in that part of the liquid material is still in an atomization state after the liquid material is dried, and enters the tail gas absorption tower 2 along with the tail gas together, the circulation of the liquid material is carried out in the tail gas absorption tower 2 at any moment by a circulation pump 18, and the liquid material is heated and concentrated by the residual heat of the tail gas. The invention has the advantages that the liquid material is concentrated by utilizing the tail gas, the residual material and the residual heat of the tail gas are fully utilized, energy resources are saved, the mass output rate is enhanced, the discharge of the waste gas and the waste heat is reduced, the pollution is reduced, and the cost is lowered.

Description

(1) Technical field [0001] The invention relates to an energy-saving and environment-friendly chemical device and method, in particular to a high-purity nano-polyaluminum chloride high-efficiency, energy-saving and environment-friendly preparation device and method. (2) Background technology [0002] In the production process of the usual polyaluminum chloride production equipment, the chemical reaction efficiency is not high, and the waste is very large. One of them is that a large amount of waste heat is generated during the synthesis of aluminum chloride. If the waste heat cannot be discharged in time, it will affect the normal progress of the chemical reaction. If the high-temperature gas is directly discharged, a great waste of heat energy will be formed; During the drying process of aluminum products, the atomized tail gas still contains the effective substance of atomized aluminum chloride, and the tail gas discharge forms serious pollution, which reduces the output r...

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Problems solved by technology

[0003] The purpose of the present invention is to design a high-purity nano-polyaluminum chloride high-efficiency, energy-saving and environment-friendly preparation device and method to solve the problems of equipment simplification, full utilization of tail gas and waste heat utilization of the preparation device of polyaluminum chloride

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