A method for preparing coal-water slurry by using coal chemical wastewater and coal-water slurry additives

A technology for preparing coal chemical wastewater and additives, applied in fuel additives, petroleum industry, liquid carbon-containing fuels, etc., to achieve the effects of turning waste into wealth, zero emissions, and low viscosity

Active Publication Date: 2019-09-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some deficiencies in the use of commonly used dispersants, and the additives for preparing coal-water slurry from coal chemical wastewater are basically blank. The further development and application of coal water slurry technology is of great significance

Method used

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  • A method for preparing coal-water slurry by using coal chemical wastewater and coal-water slurry additives
  • A method for preparing coal-water slurry by using coal chemical wastewater and coal-water slurry additives
  • A method for preparing coal-water slurry by using coal chemical wastewater and coal-water slurry additives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The additive here only adopts the formaldehyde condensate of sodium methyl naphthalene sulfonate. It is preset that the proportion of pulverized coal is 60%, the weight of wastewater is 39.65%, and the weight of additives is 0.35%. Coal coking wastewater is used to prepare 50g of coal-water slurry. The results are shown in group No. 1 in Table 1. Example 2:

Embodiment 2

[0035] The additive here only adopts cetyltrimethylammonium bromide. Preset coal powder weight ratio is 60%, wastewater weight ratio is 39.65%, additive weight ratio is 0.35%, coal gasification wastewater is used to prepare 50g coal water slurry. The results are shown in group No. 2 in Table 1.

Embodiment 3

[0037] Additive adopts the weight ratio composition of 10% hexadecyltrimethylammonium bromide, the formaldehyde condensate of 80% sodium methylnaphthalene sulfonate and 10% sodium nitrate here, adding method is as previously mentioned, wherein first added Part of the waste water accounts for 85%, and the remaining waste water accounts for 15%. It is preset that the proportion of pulverized coal is 61%, the weight of wastewater is 38.6%, and the weight of additives is 0.40%. Coal coking wastewater is used to prepare 50g of coal-water slurry. Add hexadecyltrimethylammonium bromide, coal powder, and some waste water, mix them, stir for 30 minutes, and let stand for 60 minutes. The results are shown in group 3 in Table 1.

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Abstract

The invention relates to a coal water slurry additive technology, and is aimed at providing a coal water slurry additive for wastewater slurrying in the coal chemical industry and application of the coal water slurry additive in slurrying. The additive is prepared from, by weight, 10-20% of cetyl trimethyl ammonium bromide, 70-80% of formaldehyde condensate of sodium methyl naphthalene sulfonate and 10% of electrolyte. In use, positive ion and negative ion components, electrolyte, wastewater and the like in the additive are added in the slurrying process in two steps, and the prepared coal water slurry has the advantages of being high in concentration, low in viscosity and good in stability and rheological behavior; the preparation and application cost of the coal water slurry is reduced,the wastewater of the coal chemical industry is comprehensively used, the wastewater is turned into wealth, zero emission is realized, and remarkable economic benefits and environment protection significance are achieved. The prepared wastewater coal water slurry of the coal chemical industry can serve as gasification raw materials and combustion fuel, a large amount of organic matter in wastewater can be converted into effective components in synthesized gas during gasification reaction, and heat value and gasification efficiency are improved.

Description

technical field [0001] The invention relates to a coal-water slurry additive technology, in particular to a coal-water slurry additive for pulping coal chemical wastewater and its application in pulping. Background technique [0002] The distribution of fossil energy in my country is characterized by rich coal, poor oil, and little gas. Coal accounts for more than 60% of my country's primary energy consumption structure. This coal-based energy production and consumption structure will not change in a long period of time. Therefore, coal occupies a very important position in my country's national economic development and people's lives. Coal-water slurry is a new type of coal-based clean fuel developed during the oil crisis in the 1970s, and it can also be used as a synthetic gas raw material for the production of chemical products. Coal water slurry is a solid-liquid dispersion system composed of about 65-70% coal, 30-35% water and 0.5-1% chemical additives. [0003] With t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32C10L10/18
Inventor 刘建忠王双妮李宁程军张彦威王智化周俊虎岑可法
Owner ZHEJIANG UNIV
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