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A high calorific value coal water slurry

A coal-water slurry, high calorific value technology, which can be used in fuel additives, liquid carbon-containing fuels, petroleum industry, etc., and can solve problems such as low calorific value

Active Publication Date: 2019-07-09
刘生明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The apparent viscosity of this product is about 1100mPa.s, and the combustion efficiency is over 99%, but the calorific value is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of modified lignite: After lignite is mixed with organic solvent, it is added into a closed reaction kettle, and the reaction is carried out under the operating conditions of pressure of 5MPa, temperature of 220°C, and reaction time of 30min. After the reaction, the mixture is separated from liquid to solid to obtain drying and upgrading Lignite and separation liquid, the modified lignite is used to prepare coal water slurry; the organic solvent is a mixed solvent of methanol and ethyl acetate, and the volume ratio of methanol and ethyl acetate is 1:1.

[0035] Prepare coal-water slurry: (1) carry out ball milling with broken modified lignite, water and dispersing agent, obtain semi-finished product slurry after sieving and filtering; / min), shear and homogenize to obtain coal water slurry.

[0036] Wherein the dispersant is lignosulfonate, the stabilizer is sodium carboxymethyl cellulose, and the combustible fuel is crude oil.

[0037] The dosage and parts...

Embodiment 2

[0039] Others are the same as in Example 1, and the modified lignite consumption is 70 parts by weight.

[0040]The apparent viscosity of coal water slurry is 1230mPa.s, and the calorific value is 6070kcal / kg.

Embodiment 3

[0042] Others are the same as Example 1, 8 parts by weight of combustible oil.

[0043] The apparent viscosity of coal water slurry is 1150mPa.s, and the calorific value is 5840kcal / kg.

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Abstract

The invention provides coal water slurry with a high calorific value. The coal water slurry is prepared from 70 to 80 parts by weight of pulverized coal, 10 to 20 parts by weight of water, 3 to 8 parts by weight of combustible oil, 0.1 to 0.5 part by weight of methanol, 0.1 to 0.5 part by weight of stabilizer and 0.1 to 0.5 part by weight of dispersant. The coal water slurry is prepared by stirring the raw materials. An organic solvent is a mixed solvent of the methanol and ethyl acetate; the volumetric ratio of the methanol to the ethyl acetate is (2 to 3) to (3 to 2); lignite and the organic solvent are mixed according to the mass-to-volume ratio of 1g / 15ml to 1g / 30ml. The calorific value of the coal water slurry, provided by the invention, is kept at 5600kcal / kg or above; meanwhile, apparent viscosity is controlled at 1300mPa or below; calorific value demand can be met, good stability and viscosity also can be kept, and long-range transport is facilitated.

Description

technical field [0001] The invention relates to a high calorific value coal water slurry and a preparation method thereof. Background technique [0002] Coal water slurry is a new, efficient and clean coal-based fuel, and it is a new member of the fuel family. It is composed of 65%-70% coal with different particle size distribution, about 29-34% water and about 1% chemical additives made mixture. After many rigorous processes, impurities such as incombustible components in coal are screened out, and only the essence of carbon is retained, becoming the essence of coal water slurry. It has the same fluidity as oil, and its calorific value is half that of oil, so it is called a liquid coal product. Coal water slurry technology includes key technologies such as coal water slurry preparation, storage and transportation, combustion, and additives. It is a system technology involving multiple disciplines. Coal water slurry has the characteristics of high combustion efficiency and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32C10L10/00
CPCC10L1/326C10L10/00C10L2290/24
Inventor 斯养武
Owner 刘生明
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