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Method for solving contamination during combustion of high-sodium coal by forming composite sodium compound

A compound, high sodium coal technology, applied in the field of coal chemical industry, can solve problems such as different effects

Inactive Publication Date: 2020-02-04
宋文奇
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, different optimal blending ratios of oil shale lead to different effects when used. It is necessary to find a suitable ratio to maximize the rational use of oil shale

Method used

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  • Method for solving contamination during combustion of high-sodium coal by forming composite sodium compound
  • Method for solving contamination during combustion of high-sodium coal by forming composite sodium compound
  • Method for solving contamination during combustion of high-sodium coal by forming composite sodium compound

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Embodiment

[0025] Embodiment: first Na in coal ash O content is 2.8%, 3.3%, 4.6%, K O content is 0.5%, 0.6%, three kinds of high sodium coals of 2.0% and Na in coal ash O content is 0.9%, 1.0% The two low-sodium coals are ashed separately, and then the coal ash is made into ash cones respectively, put into the muffle furnace and heated to 900°C and 1000°C respectively and kept at the temperature for half an hour, stop heating and take out the ash cones after cooling. It was observed that the appearance of the ash cones of the three high-sodium coals was dark brown, and the surface was covered with dissolved crystals; the appearance of the low-sodium coal ash cones was off-white, the surface was relatively smooth, and no dissolved crystals were clearly seen. It can be seen that the fouling mechanism of high-sodium coal is mainly caused by the dissolution of sodium compounds at high temperatures. According to the applicant's systematic sampling and analysis of the coal mines in the Zhundon...

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Abstract

The invention discloses a method for solving contamination during combustion of high-sodium coal by forming a composite sodium compound. An optimal mixing proportion range of oil shale is that the optimal proportion is to blend zhundong coal (the Na2O content in coal ash is higher than 3%) with oil shale of 5%-20% (zhundong coal to oil shale is (95-80) to (5-20)), and by blending oil shale of 15%in zhundong coal, the slag-bonding and contamination characteristics of zhundong high-sodium coal can be effectively improved so as to solve the problem of coking on a heating surface that is prone tooccurring when a large number of boilers use the zhundong coal.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a method for solving the contamination of high-sodium coal during combustion by forming a composite sodium compound. [0002] technical background [0003] The Zhundong area of ​​Xinjiang is famous for its large production of Zhundong coal. The current price of Zhundong coal is relatively low, but because the coal ash contains more Na and K elements, the sodium in the coal ash (taken as Na 2 O) content is generally higher than 3%, and the melting temperature of coal ash is low, so many units use Zhundong coal by partial blending, and under the current situation, coking shutdown accidents are still prone to occur. Oil shale (also known as oil shale) is a high-ash sedimentary rock containing combustible organic matter. The main difference between it and coal is that the ash content is basically 60-80%. Oil shale is listed as a very important alternative energy source in the 21...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/00C10L9/10C10L5/00
CPCC10L5/00C10L9/00C10L9/10C10L2290/24
Inventor 宋文奇
Owner 宋文奇