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Technique for using leather products industrial waste as fuel

A technology of industrial waste and process method, applied in the field of process where industrial waste of leather products is used as fuel, can solve problems such as unfavorable environmental protection, achieve energy saving, significant economic and social benefits, and easy operation

Inactive Publication Date: 2009-08-12
WEIFANG HUAYOU LINEN WEAVING
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  • Description
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Problems solved by technology

Under alkaline conditions, more than 98% of chromium becomes chromic acid. Incineration of chromium-containing leather shavings and sludge under alkaline and low temperature conditions, it is found that only 25% of chromium becomes hexavalent, and a large amount of SO is also produced. x , NO x Harmful gases, not conducive to environmental protection

Method used

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  • Technique for using leather products industrial waste as fuel
  • Technique for using leather products industrial waste as fuel
  • Technique for using leather products industrial waste as fuel

Examples

Experimental program
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Embodiment Construction

[0039] a. Put the industrial waste of leather products and coal into the pre-combustion zone of the industrial boiler according to the ratio of 1:1 and mix them to form a mixed fuel;

[0040] b. Combusting the above-mentioned mixed fuel in an industrial boiler. The industrial boiler includes a furnace body, which is divided into a pre-combustion zone, a combustion zone, and a burnout zone. The shell wall of the furnace body is composed of an inner wall and an outer shell, and a water clamp filled with circulating water set.

[0041] First, place the mixed fuel in the pre-combustion zone at a temperature of 550-650°C for anaerobic baking; then put the smoke generated after the mixed fuel is baked in the combustion zone for gasification at a temperature of 1150-1250°C ; Finally, the gasified flue gas is fully oxy-combusted in the burnout zone.

[0042] c. Use the heat recovery device to recover and convert the heat generated after incineration;

[0043] d. The chromium salt p...

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Abstract

The invention discloses a technological method for using a leather product industrial waste as a fuel. The method comprises the following steps of: a. throwing the leather product industrial waste and coal in a proportion of between 1 to 1 and 1 to 3 into a pre-combustion area of an industrial boiler for mixing to form a mixed fuel; b, incinerating the mixed fuel in the industrial boiler by using the third-order 'thermal decomposition type' incinerating process; c, recovering and converting the heat generated after the incinerating by a heat recovery device; and d, changing chromium salt generated after the incinerating into water-soluble chromate by an alkaline roasting method, and carrying out recovery by water leaching. The technological method not only can provide combustion heat and recover a toxic chromium element, but also can effectively reduce the content of harmful gases, such as SOx, NOx and the like generated during burning the fuel.

Description

technical field [0001] The invention relates to a process method for using industrial waste of leather products as fuel. Background technique [0002] With the adjustment of the world's industrial structure, the leather industry has shifted from developed countries to developing countries. my country has a wide range of labor resources, rich raw hide resources, sufficient production capacity and a certain level of technology. At the same time, it occupies one-fifth of the world's large market, which is suitable for the development of labor-intensive leather industry. According to statistics, China's current leather enterprises have reached more than 16,000, and the number of employees has reached about 2 million. However, while my country's leather industry is developing rapidly, it has also brought serious environmental pollution. The annual discharge of leather solid waste is more than 1.4 million tons, mainly including waste hair, waste dander, chrome tanned leather and ...

Claims

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Application Information

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IPC IPC(8): F23G7/00F23K1/00C01G37/00
CPCY02E20/34Y02P20/10
Inventor 张维友张启泉
Owner WEIFANG HUAYOU LINEN WEAVING
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