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Novel decoking agent for fire coal

A decoking agent and coal-fired technology, applied in the field of combustion chemistry, can solve the problems of lack of high-sodium coal combustion viscosity reduction, slag prevention, decoking, high-sodium coal boiler viscosity reduction, slag prevention, coke removal and other problems , to achieve the effects of reducing sticking and slagging hazards, convenient application, and reducing coking intensity

Inactive Publication Date: 2014-03-12
陈方
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are dozens of coal-fired decoking agent technologies and patents at home and abroad, which have played a certain role in the coking prevention and decoking of ordinary coal-fired coal, but are not effective in reducing viscosity, slag prevention, and decoking of high-sodium coal boilers. The effect is not great, and there is a lack of new technologies for viscosity reduction, slag prevention, and decoking specifically for high-sodium coal combustion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: make 10kg decoking agent referred to in the present invention, its parts by weight consist of: kaolin 70, silica sand 15, its composition material fine powder (80-100 order) is mixed uniformly, makes solid decoking agent, takes out Add 2kg of coking agent to 98kg of pulverized coal with an ash sodium oxide content of 4.2%, mix evenly, and burn in the test boiler at a combustion temperature of 900-1200°C. After the combustion is stopped, there will be slagging on the furnace and the heating surface Layer, remove the slagging on the center of the heating surface of 0.04 square meters and weigh it, the weight of the slagging is 0.058kg. Be 100kg of pulverized coal with the same amount of coal ash sodium oxide content of 4.2%, without adding the decoking agent referred to in the present invention, do the combustion comparison sample in the test boiler under the same conditions, after stopping the combustion, the furnace and the heating surface If there is obvi...

Embodiment 2

[0023] Embodiment 2: make 10kg decoking agent that the present invention refers, and its parts by weight consist of: industrial alumina powder 50, silica sand 50, its composition material fine powder (80-100 order) is mixed uniformly, makes solid decoking Take out 2kg of coking agent, add it to 98kg of pulverized coal with 4.2% coal ash sodium oxide content, mix evenly, and burn in the test boiler at a combustion temperature of 900-1200°C. After the combustion stops, the furnace and the heating surface have For the slagging layer, remove the slagging on the 0.04 square meter center of the heating surface and weigh it, and the slagging weight is 0.047kg. Be 100kg of pulverized coal of Zhundong high-sodium coal with the same amount of coal ash sodium oxide content of 4.2%, do not add the decoking agent referred to in the present invention, do the combustion comparison sample in the test boiler under the same conditions, after stopping the combustion , There is obvious slagging i...

Embodiment 3

[0024] Embodiment 3: make the decoking agent that 10kg the present invention refers, its parts by weight consist of: bauxite (bauxite) 65, vermiculite 20, its composition material fine powder (80-100 order) is mixed homogeneously, Make a solid decoking agent, take out 2kg of the coking agent, add it to 98kg of coal powder with ash sodium oxide content of 2.6%, mix evenly, and burn in the test boiler at a combustion temperature of 900-1200°C. After the combustion is stopped, There is a slagging layer on the furnace and the heating surface, and the slagging on the 0.04 square meter area in the center of the heating surface is removed and weighed, and the weight of the slagging is 0.027kg. Be 100kg of pulverized coal of Zhundong high-sodium coal with the same amount of coal ash sodium oxide content of 2.6%, do not add the decoking agent referred to in the present invention, do the combustion comparison sample in the test boiler under the same conditions, after stopping the combust...

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Abstract

The invention discloses a novel decoking agent for fire coal. According to the invention, an aluminum-system compound is used as a main agent, and a silicon-system compound is used as an auxiliary agent; in terms of oxides, the decoking agent comprises, by weight, 35 to 70 parts of alumina and 15 to 50 parts of silicon oxide, the sum of the weight parts of alumina and silicon oxide is no less than 60, and a ratio of the weight parts of alumina and silicon oxide is no less than 0.40. The novel decoking agent provided by the invention can directly increase the melting point of high-sodium coal ash during boiler combustion, substantially lowers down the degree to which a hearth and a heating surface are contaminated by sticky fusion products and the degrees of slag-bonding and coking during high temperature combustion, and has a decoking rate of 50 to 80%.

Description

technical field [0001] The invention relates to combustion chemical technology, especially a novel coal-burning decoking agent. Background technique [0002] With the development of my country's economy, the rapid development of electric power industry, high energy consumption industry and urban heating equipment has made the demand for coal resources huge, and some new coal mine resources are constantly being discovered, especially new coal fields such as Xinjiang Zhundong and Hami Naomao Lake. Due to the exploration and development of coal, some alkali metals, especially coal with high sodium content, have been pushed to the market, resulting in serious contamination, slagging, coking and other phenomena in the furnace and heating surface caused by the combustion of high sodium content coal, which directly affects the operation of the boiler The safety and economy and the availability of the boiler. Xinjiang Zhundong Coalfield has a proven coal reserve of 390 billion tons. ...

Claims

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Application Information

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IPC IPC(8): C10L9/10
Inventor 陈卓尔陈方
Owner 陈方
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