Oxygen-enriched gas producing method for hybrid gas furnace

A technology for mixing gas and producing furnace, which is applied in the directions of manufacturing combustible gas, climate sustainability, sustainable manufacturing/processing, etc., can solve the problems of low gas calorific value, etc., and achieves improved gas calorific value, reduced efficiency, and good economic benefits and social benefits

Active Publication Date: 2011-06-15
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] During the normal production and operation of the producer furnace, due to the release of heat from the oxidation reaction of oxygen and carbon in the furnace, the endothermic reduction reaction of carbon dioxide and carbon and the endothermic reaction of water vapor and carbon, the continuous production can be maintained, so the mixed gas Producer is a continuous gas production, the output gas has a lot of nitrogen, CO+H 2 The amount is relatively low, about 40%, so the calorific value of gas is low

Method used

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  • Oxygen-enriched gas producing method for hybrid gas furnace
  • Oxygen-enriched gas producing method for hybrid gas furnace
  • Oxygen-enriched gas producing method for hybrid gas furnace

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Experimental program
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Effect test

Embodiment 1

[0048] July 2007, press 80m on selected furnace 3 / h, 100m 3 / h, 120m 3 The flow rate of oxygen per hour is passed into the air pipe, and the preliminary exploration of oxygen-enriched gas production has been carried out. Since the device is in the initial stage of load operation, the device starts and stops frequently due to equipment reasons, and the total gas production is about 350m 3 / h, the concentration is greater than 80%, with 15 # The furnace is used as the main test furnace, and the excess oxygen is fed into 13 # The furnace may be emptied, during which the oxide layer elongation and slagging occurred to varying degrees in the furnace. During the oxygen-enriched oxidation period, the furnace condition was relatively stable, and the indicators improved to a certain extent. When the oxygen enrichment is put into or withdrawn, the furnace condition is not easy to grasp, and the gas quality fluctuates greatly, and the furnace was forced to be withdrawn for maintenan...

Embodiment 2

[0055] In August 2007, the oxygen generation system shut down 5 times in total, 2 of which were program-controlled valve failures, which took a long time, 2 shut downs due to poor connection of CPU backplane wiring, and 1 shut down due to planned repair of the oxygen station. The production started on the 15th. Due to the experience of last month, the furnace condition control is relatively stable, and 7 of the 66 calorific value analysis data exceed 6.0MJ / Nm 3 above.

[0056] Table 2 Oxygen flow rate 140m 3 / h~200m 3 / h effect comparison

[0057]

[0058] It can be seen from Table 2 that the calorific value of the oxygen-enriched furnace has risen steadily, the quality of the medium lump coal is also relatively stable, and the carbon content of the ash is higher than that of the previous month (see Table 6).

Embodiment 3

[0060] In September 2007, the oxygen-enriched content continued to be increased as planned. Whenever the oxygen flow rate was increased or decreased, the furnace condition was difficult to control; in addition, the supply of anthracite from outside was tight in September, and the bottom coal and the anthracite poured into the open storage yard accounted for a large part For a large proportion, the coal powder content rate is as high as 25%, and the water content is more than 5.5%, which will cause the material layer in the furnace to be easily blown over, and the material layer will partially form a wind tunnel and catch fire, which will cause the furnace temperature to rise too fast, which will easily lead to Furnace condition deteriorates, affecting gas quality and output.

[0061] Table 3 Oxygen flow rate 200m 3 / h~230m 3 / h effect comparison

[0062]

[0063] It can be seen from Table 3 that the monthly average carbon content of oxygen-enriched furnace ash is 29.20% (...

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Abstract

The invention provides an oxygen-enriched gas making method for a mixed gas producer furnace, which comprises the following steps: lowering the content of inactive gas nitrogen through improving the concentration of useful components oxygen in gasifying agent, improving gasification intensity and coal utilization ratio of a producer furnace, assuring the optimum gasifying agent oxygen concentration scope which is 24.0%-25.5% when a TG-3m or II-3m type mixed coal gas producer furnace is producing gas in oxygen-enriched. The method of the invention can effectively improve mixing producer furnace calorific value of gas, gasification intensification and efficiency, lower slab carbon content, achieve the purpose of saving energy and reducing emission, and has considerable economic and social benefits.

Description

technical field [0001] The invention relates to a mixed gas generator, in particular to an oxygen-enriched gas production method for the mixed gas generator. Background technique [0002] The normal pressure fixed bed gasifier, which uses the mixed gas of air and water vapor as the gasification agent, is referred to as the mixed gasifier. The TG-3m type and The -3m type gas furnaces are all mixed gas generators. The gasified coal is mainly Guizhou medium lump coal with a particle size of 13-50 mm. The calorific value, gasification intensity and efficiency are low, the carbon content of ash is relatively high, and coal resources have not been fully utilized. [0003] The main types of chemical reactions in the mixed gas generator are: [0004] 1) The reaction between the carbon in the coal and the oxygen and water vapor in the gasification agent. [0005] 2) The reaction between oxygen, water vapor and various generated gases in the gasification agent. [0006] 3) Therma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/20
CPCY02P20/10
Inventor 瞿向东刘保伟胡黔生韦茂森黎枝肖张铁韬黄先朝刘智勇谢爱武乃为田孙毅
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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