Method and device capable of simultaneously providing various clean heat sources to prepare polyaluminum chloride

A polyaluminum chloride, heat source technology, applied in aluminum chloride, aluminum halide, chemical industry and other directions, can solve the problems of low production energy consumption, large equipment investment, increase heat supply of steam boilers, etc., to achieve small heat loss and operation. The effect of low power and operating costs and high heat exchange efficiency

Active Publication Date: 2013-01-02
长沙天水环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of heat transfer oil drum dryer, due to the high temperature of the drying heat source, it can dry liquid polyaluminum chloride products with a basicity higher than 88%. The liquid aluminum oxide content of this type of product can reach about 12%. Therefore, the production energy consumption is relatively high. Low, the coal consumption per ton of product is only 300kg. In addition, because the basicity of the liquid product is reduced to 88%, part of the bauxite can be replaced by aluminum hydroxide raw materials in the production process, and the amount of calcium aluminate is also reduced, so the heavy metal content in the product Compared with the product produced by the steam drum dryer; the disadvantage of this technology is that the hot air of the heat conduction oil furnace needs to add a dust removal and desulfurization system, and the heat brought by the hot air cannot be fully utilized; the production of the spray dryer has a high technical content and equipment investment. It is nearly ten times that of the drum dryer, so there are not many enterprises using this method to dry, and this part of the product accounts for about 30% of the national output.
The shortcoming of this technology is that the system does not generate steam, and the production section of liquid polyaluminum chloride needs to increase the heat supply of steam boilers, and it is difficult for small steam boilers to pass the environmental assessment

Method used

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  • Method and device capable of simultaneously providing various clean heat sources to prepare polyaluminum chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Using 6000kcal / kg ordinary bituminous coal with a sulfur content of 2% as fuel, it is required to produce 3.5 tons of polyaluminium chloride (equivalent to solid products) per hour, including 2.0 tons of industrial-grade yellow products per hour (1.5 tons of which are drum-dried) Machine drying, another 0.5 tons are sold as liquid products, no need to dry) and drinking water grade light yellow polyaluminum chloride produces 1.5 tons per hour, drinking water grade products are dried with a spray dryer, industrial grade polyaluminum chloride liquid alumina The content is 10%, the basicity is 95%, the content of drinking water grade polyaluminum chloride liquid alumina is 14.0%, and the basicity is 75%. The total heat supply capacity of the combustor of the system is 5.3 million kcal / hour, the heat supply required for the drying of the drum dryer is 2 million kcal / hour, the heat supply required for the production of liquid polyaluminum chloride is 1 million kcal / hour, and t...

Embodiment 2

[0035]Using 4500kcal / kg bituminous coal with a sulfur content of 4% as fuel, it is required to produce 3.5 tons of polyaluminium chloride (equivalent to solid products) per hour, including 2.0 tons of industrial-grade yellow products per hour (1.5 tons of products are produced by drum dryers) Drying, another 0.5 tons are sold as liquid products, no drying is required) and high-purity grade white products are produced at 1.5 tons per hour, high-purity polyaluminum chloride is dried with a spray dryer, and the content of industrial-grade polyaluminum chloride liquid alumina is 10%, The basicity is 95%, the content of high-purity polyaluminum chloride liquid alumina is 18.0%, and the basicity is 48%. The total heat supply capacity of the combustion chamber of the system is 5.3 million kcal / hour, the actual heat consumption is 5.2 million kcal / hour, the heat supply required for drying by the drum dryer is 2 million kcal / hour, and the supply required for the production of liquid pol...

Embodiment 3

[0037] Using 5000kcal / kg bituminous coal with a sulfur content of 1% as fuel, it is required to produce 3.5 tons of polyaluminum chloride (equivalent to solid products) per hour, including 2.0 tons of industrial-grade light yellow products per hour (of which 1.5 tons of products are drum-dried machine drying, and another 0.5 tons are sold as liquid products without drying) and high-purity grade white products are produced at 1.5 tons per hour, high-purity polyaluminum chloride is dried with a spray dryer, and the content of industrial-grade polyaluminum chloride liquid alumina is 12% , the basicity is 89%, the content of high-purity polyaluminum chloride liquid alumina is 18.5%, and the basicity is 45%. The total heat supply capacity of the combustion chamber of the system is 5.3 million kcal / hour, the actual heat consumption is 5.1 million kcal / hour, the heat supply required for drying by the drum dryer is 1.95 million kcal / hour, and the supply required for the production of l...

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Abstract

The invention discloses a method and a device capable of simultaneously providing various clean heat sources to prepare a polyaluminum chloride. The method includes preparing clean high temperature hot wind, performing heat supply by a conduction oil heat exchanger, performing heat supply by a vapor generator, performing heat supply by a spray dryer, performing hot wind purification by the spray dryer and performing tail gas treatment. The method and the device capable of simultaneously providing various clean heat sources to prepare the polyaluminum chloride have the advantages that heat supply systems are centralized, the heat supply efficiency is high, and polyaluminum chloride product production is low in energy consumption, small in pollution and low in operating cost.

Description

technical field [0001] The invention relates to a method for simultaneously providing multiple clean heat sources for preparing polyaluminum chloride, and also relates to a device for realizing the method for simultaneously providing multiple clean heat sources for preparing polyaluminum chloride. Background technique [0002] Polyaluminum chloride is an excellent water purifying agent product, and the market demand is increasing year by year. my country is a major producer of polyaluminum chloride products, and the output in 2011 has exceeded 1.5 million tons. However, the polyaluminum chloride industry is a market with sufficient market competition. industry, the production threshold is low, there are hundreds of production enterprises in the industry, most of the production scale is around 10,000-20,000 tons / year, and there are few large enterprises. [0003] The production of polyaluminum chloride mainly uses bauxite, calcium aluminate, aluminum hydroxide, sodium aluminat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/56
CPCY02P20/10
Inventor 晏永祥
Owner 长沙天水环保科技有限公司
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