Chemical method

A chemical method, silicon dioxide technology, applied in the chemical field, can solve the problems of high-sodium coal contamination, slagging and ash deposition, insufficient control technology, slagging, ash deposition, contamination, etc., to reduce the viscosity of fly ash , Reduce the tendency of slagging, improve the effect of reaction efficiency

Inactive Publication Date: 2013-12-04
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

[0008] The use of high-sodium coal in a high-temperature environment is likely to cause contamination, slagging and ash deposition. At present, there are still deficiencies in the control technology for high-sodium coal contamination, slagging and ash deposition

Method used

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Embodiment

[0022] A chemical method for improving the combustion of high-sodium coal: evenly spray a silica sol solution with a concentration of 1-90% on the high-sodium coal or soak the high-sodium coal in a 1-90% silica sol solution for 1-120 minutes to ensure that the silica The sol fully penetrates into the pores of coal particles through the coal surface. During the spraying and soaking process, part of the water-soluble sodium in the high-sodium coal can be washed away, reducing the release of active sodium-containing components when the boiler burns high-sodium coal; due to direct Combustion of coal with high water content will lead to problems such as unstable operation of the boiler, so the high-sodium coal treated with silica sol solution is dried with hot air to reduce its moisture, so that the excess moisture brought into the high-sodium coal by the silica sol solution is dried while the silica in the solution remains in the internal pores and surfaces of the coal particles; d...

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Abstract

The invention provides a chemical method. The chemical method can reduce adverse effects of active sodium-containing components in high-sodium coal on a boiler and other devices in a high-temperature environment, and comprises the following steps: step 1, pretreatment, namely uniformly spraying a certain amount of a silica sol solution containing silica onto the high-sodium coal or soaking the high-sodium coal in the silica sol solution for a period of time to obtain high-sodium coal completely subjected to pretreatment; step 2, drying, namely drying the high-sodium coal completely subjected to pretreatment to obtain dried high-sodium coal; step 3, conveying the dried high-sodium coal to the high-temperature environment for use, wherein in the process, the silica and active sodium-containing components react to generate a sodium-containing substance which is high in melting point and insusceptible to volatilization.

Description

technical field [0001] The invention relates to a chemical method for improving the adverse effects of sodium-containing components in high-sodium coal on boilers and other equipment in high-temperature environments. Background technique [0002] my country is a country rich in coal resources. Coal is the main energy source in our country, accounting for more than 70% of the energy consumption structure. Moreover, under the premise that oil resource reserves are dwindling and new energy development needs to be improved, the advantages of coal resources are becoming increasingly obvious. [0003] High-sodium coal refers to coal with high sodium content in coal, which has certain reserves in China, Australia, the United States, Germany and other places. Zhundong, Xinjiang is an area rich in coal resource reserves, with predicted reserves of 390 billion tons. At present, the cumulative proven coal resource reserves are 213.6 billion tons, and the coal-forming area of ​​the coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/02C10L9/08C10L9/00
Inventor 张守玉陈川施大钟王健郭熙董爱霞熊绍武郑红俊吴巧美邓文祥刘大海唐文蛟张敬斋奚兴悦
Owner UNIV OF SHANGHAI FOR SCI & TECH
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