Coal water slurry additive and application thereof

A technology of coal water slurry and additives, applied in the field of coal chemical industry, to achieve the effects of enhancing electrostatic repulsion, improving hydrophilicity, and reducing water separation rate

Active Publication Date: 2015-08-05
QUFU SANRANG COAL WATER SLURRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these compounded coal-water slurry additives still expose various problems and deficiencies, mainly the viscosity, water separation rate, fluidity and stability and combustion efficiency of coal-water slurry are not satisfactory; at the same time, the scope of application is narrow, or Larger usage leads to higher cost

Method used

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  • Coal water slurry additive and application thereof
  • Coal water slurry additive and application thereof
  • Coal water slurry additive and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Coal sample origin: Yanzhou Coalfield Xinglong Mine. Relevant indicators: ash content (9%); sulfur content (0.48); calorific value (6557 kcal / kg); total moisture content is 5.9%; grindability index HGI is 60.

[0031] according to figure 1 The process flow shown produces 290 tons of coal-water slurry; including 199 tons of raw coal, 1.015 tons of additives, and 90 tons of water. The composition of the additives is shown in Table 1. The properties of the prepared coal water slurry are shown in Table 2. The percentage values ​​are all percentage values ​​by weight.

Embodiment 2-3

[0033] Repeat the steps of Example 1, except that the composition of the additives is different, as shown in Table 1. The properties of the prepared coal water slurry are shown in Table 2.

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Abstract

The invention discloses a coal water slurry additive which is composed of 20-40 wt% of water reducing agent, 20-35 wt% of lignosulfonate, 20-35 wt% of inorganic alkali, 2-20 wt% of ethylene glycol, 2-15 wt% of sodium metasilicate pentahydrate and 1-10 wt% of carboxymethyl cellulose. Besides, the invention also discloses application of the coal water slurry additive in preparing a coal water slurry. The coal water slurry additive can promote the disperse phase (coal particles) to be uniformly dispersed in the dispersion medium (water), and can effectively enhance the hydrophilicity of the coal and the electrostatic repulsion among the coal particles. The prepared coal water slurry has the advantages of higher coal content (or concentration), low viscosity, low bleeding rate, high flowability and high stability. Compared with the traditional formula, the coal water slurry additive can lower the slurry making cost by more than 20%.

Description

technical field [0001] The invention belongs to the field of coal chemical industry and relates to a coal water slurry additive and its application. technical background : [0002] Coal water slurry is a new type of coal-based fluid fuel, which is made of about 60% to 70% coal, about 30% to 40% water and a small amount of additives through a certain process. It not only retains the original physical characteristics of coal; at the same time, it has the same fluidity and stability as petroleum, which can be stored, pumped, atomized and stably burned; coupled with its low price, it is an ideal substitute coal clean fuel. Coal water slurry is widely used in industrial boilers, industrial kilns and power plant boilers to replace oil, gas and coal for combustion; it can also be used as gasification raw material for the production of synthetic ammonia and synthetic methanol, etc., which can effectively reduce dust pollution and low sulfur emissions of pollutants and nitrides. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/24C10L1/12C10L1/182C10L1/185
Inventor 刘宏韬
Owner QUFU SANRANG COAL WATER SLURRY CO LTD
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