Flux for reducing fine coal gasification ash melting point temperature and use method thereof

A technology of flux and ash melting point, used in granular/powder fuel gasification, fuel additives, solid fuels, etc., can solve problems such as waste of land resources, reduce the melting point of coal ash, improve the melting characteristics of coal ash, and widen coal applicability effect

Active Publication Date: 2015-04-01
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, landfill is the main way to deal with it, and only part of it is comprehensively utilized, which not only wastes a lot of land resources, but also produces secondary pollution.

Method used

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  • Flux for reducing fine coal gasification ash melting point temperature and use method thereof
  • Flux for reducing fine coal gasification ash melting point temperature and use method thereof
  • Flux for reducing fine coal gasification ash melting point temperature and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 Select a coal sample with a high ash melting point from a power plant in Shanxi, prepare a coal powder sample according to the above-mentioned standard method, use an intelligent ash fusion tester to analyze and obtain a coal ash deformation temperature of 1420 ° C, and use a 6% ratio of papermaking sludge flux powder Add it to the high ash melting point coal powder sample of the power plant, and mix evenly to prepare a mixed ash sample.

Embodiment 2

[0025] Example 2 Select a coal sample with a high ash melting point from a certain power plant in Sichuan, prepare a coal powder sample according to the above-mentioned standard method, and analyze it with an intelligent ash fusion tester to obtain a coal ash deformation temperature > 1450°C. The ratio is added to the high ash melting point coal powder sample of the power plant, and the mixed ash sample is prepared after mixing evenly.

Embodiment 3

[0026] Example 3 Select a coal sample with a high ash melting point from a company in Xinjiang, prepare a coal powder sample according to the above-mentioned standard method, use an intelligent ash fusion tester to analyze and obtain a coal ash deformation temperature of 1248 ° C, and use a 10% ratio of papermaking sludge flux powder Add it to the company's high ash melting point coal powder sample, and mix it evenly to prepare a mixed ash sample.

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Abstract

The invention discloses a flux for reducing a fine coal gasification ash melting point temperature and a use method thereof and belongs to the field of fluxes. The flux is papermaking sludge, contains organic matters, has air-dried base heat of 800-1000 kcal/kg and alkaline oxide mass content more than 50% and comprises, by mass, 40-56% of CaO, 3-12% of MgO, 3-12% of Al2O3, 9-15% of Fe2O3, 14-20% of SiO2, less than 3% of SO3, less than 0.8% of TiO2, less than 1% of each one of alkali metal oxides and a small amount of impurities. The use method of the flux comprises that when a raw material coal deformation temperature is less than 1450 DEG C, a flux use ratio is in a range of 6-15%, and when the raw material coal deformation temperature is higher than 1450 DEG C, a flux use ratio is in a range of 15-30%. The flux can effectively reduce a coal ash melting point, realize resource utilization of papermaking sludge waste and realize utilization of papermaking sludge heat.

Description

technical field [0001] The invention belongs to the field of flux. Background technique [0002] At present, entrained bed gasification technology has become the preferred technology for large-scale and high-efficiency coal gasification at home and abroad, and its slag discharge method is mainly liquid slag discharge. Liquid slag discharge requires the flow temperature of the ash to be less than 1400°C. If the ash melting point is too high, it will reduce the life of the refractory material and cause many problems to the normal operation of the device. my country is rich in coal resources, and a large amount of coal is high-ash melting point coal. In order to make coal with high ash melting point also be applied to the liquid slagging gasification process, the ash melting temperature is generally reduced by adding an economical and easy-to-obtain flux or using it with a coal with a low coal ash melting temperature in a certain proportion. Among them, adding Economical and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00C10J3/46C10L9/10
Inventor 马菊梅周棋毛宇刘泰生
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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