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A method for recovery and recycling of composite coal gasification catalyst

A catalyst and coal gasification technology, applied in the field of coal chemical industry, can solve the problem of high recovery cost, achieve the effects of small equipment investment, no influence on catalytic activity, and simple recovery process

Active Publication Date: 2017-10-24
杨秋良
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

It needs to be recovered and recycled. If the recovery process of conventional vanadium pentoxide is used, the recovery cost is too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Coal powder with water content of 8.5%, fixed carbon of 72.32%, volatile matter of 14.88%, ash content of 12.8%, and sulfur of 1.80% is mixed with 1.9 kg of vanadium pentoxide and 0.85 kg of industrial lime, that is, the amount of catalyst added is controlled by the amount of pulverized coal. 5% on a dry basis, mixed evenly with pulverized coal, pressed into φ20mm pellets, and added to a φ50cm×80cm test device, including 50kg of pulverized coal, CO 2 The supply volume is 20L / min, and the CO concentration is monitored with a CO monitor. Start supplying CO 2 +O 2 , with O 2 The gas supply controls the furnace temperature. When the temperature in the test device rises to 400°C, the CO concentration is 600PPm, which can be ignited. The main component of the gas is volatile gas of coal; when the temperature rises to 500°C, the CO concentration is 2000PPm. It can be ignited, and the main component of its gas is volatile gas of coal; when the temperature is 600°C, the conce...

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PUM

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Abstract

The invention belongs to the field of coal chemical industry, and in particular relates to a method for recovering and recycling a composite coal gasification catalyst. The gasification ash containing the catalyst is leached and filtered with dilute sulfuric acid, and the acidic filtrate is processed by lime precipitation and filtration. The calcium vanadate or calcium hypovanadate produced is returned to coal blending for catalytic gasification recycling; the filtrate supplemented with acid is returned to leaching the calcium vanadate or calcium hypovanadate in the gasification ash containing catalyst for recycling, after leaching and filtering The resulting ash is used as raw material for cement production. The beneficial effects of the present invention are as follows: 1. The novel composite coal gasification catalyst can be recovered and recycled with high efficiency and low cost, and the recovery cost per ton of catalyst is about 4000 yuan / T, greatly reducing the cost of coal gasification; 2. The recovery process is simple, the equipment investment is small, the preparation method of the calcium vanadate or calcium hypovanadate catalyst is simplified, and the catalytic activity is not affected, and the industrial water discharge is zero.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a method for recovering and recycling composite coal gasification catalysts. Background technique [0002] The new composite coal gasification catalyst is a newly developed coal gasification catalyst, and its composition is calcium vanadate or calcium hypovanadate, which is expensive. During coal gasification, the gasification temperature of coal can be reduced, the gasification reaction rate of coal can be doubled, the coal gasification is complete, and the residue is carbon-free. However, when the content of the catalyst in the coal base drops below 0.5% during the gasification process, its catalytic effect becomes significantly worse. It needs to be recovered and recycled. If the recovery process of conventional vanadium pentoxide is used, the recovery cost is too high. Contents of the invention [0003] The problem to be solved by the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/22
Inventor 杨秋良
Owner 杨秋良
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