Unlock instant, AI-driven research and patent intelligence for your innovation.

Coal water slurry additive and its application

A coal-water slurry and additive technology, applied in the field of coal chemical industry, can solve the problems of unsatisfactory combustion efficiency, narrow application range and high cost of coal-water slurry viscosity, water separation rate, fluidity and stability, and achieve high fluidity, The effect of low water separation rate and lower pulping cost

Active Publication Date: 2016-06-08
QUFU SANRANG COAL WATER SLURRY CO LTD
View PDF2 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coal water slurry additive and its application
  • Coal water slurry additive and its application
  • Coal water slurry additive and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Coal sample origin: Yanzhou Coalfield Xinglong Mine. Related indicators: ash content (9%); sulfur content (0.48); calorific value (6557kcal / kg); total moisture content is 5.9%; grindability index HGI is 60.

[0030] 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

[0032] 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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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. Ho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10L1/24C10L1/12C10L1/182C10L1/185
Inventor 刘宏韬
Owner QUFU SANRANG COAL WATER SLURRY CO LTD