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Compound additive for coal water slurry

An additive and coal-water slurry technology, which is applied in the petroleum industry, liquid carbon-containing fuels, fuels, etc., can solve the problems of narrow coal type and high cost, and achieve the effects of high production energy efficiency, reduced production cost, and simple preparation process and equipment.

Inactive Publication Date: 2013-10-30
JIANGSU SHENHUA DERUI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although much research has been done on CWS additives, there are still problems such as narrow range of applicable coal types and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Configure compound additives;

[0014] 1. Preparation of sulfonating agent: take 25%, concentration of 75% sodium sulfanilate of 98% concentrated sulfuric acid or react with a ratio of 1: 1.5, the reaction temperature is 150 ° C, the reaction time is 4 hours, and it is ready for use;

[0015] 2. Sulfonation reaction: heat the coal tar to 145°C. The main components of the coal tar are methylnaphthalene and biphenyl, wherein the naphthalene content is ≯15%, and the water content is ≯1.0%. Add 1.65 moles of sulfonating agent, and form a mixture through sulfonation reaction for 4 hours;

[0016] 3. Preparation of additives: add sodium hydroxide to the sulfonated mixture to adjust the pH value to 7.8, and make dry powder into composite coal water slurry additives.

[0017] With the above composite coal-water slurry additive, the add-on is 2% of the dry basis weight of coal, and the test result of making coal-water slurry:

[0018] Table 1:

[0019] Coal Type and ...

Embodiment 2

[0022] 1. Preparation of sulfonating agent: take 27% concentrated sulfite and 73% sodium sulfanilate to react with a ratio of 1:1.7, the reaction temperature is 150°C, the reaction time is 5 hours, and it is used for later use;

[0023] 2. Sulfonation reaction: heat coal tar to 120°C, add 1.5 moles of sulfonating agent, and form a mixture after 5 hours of sulfonation reaction;

[0024] 3. Preparation of additives: Add sodium hydroxide to the sulfonated mixture to adjust the pH value to 7, and make it into dry powder, which is the coal water slurry additive.

[0025] With the above composite coal-water slurry additive, the add-on is 5% of the dry basis weight of coal, and the test result of making coal-water slurry:

[0026] Table 2:

[0027] Coal type, slurry difficulty

[0028] Tests show that its dispersibility is better, but not as good as that of No. 1 sample in other properties.

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PUM

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Abstract

The invention relates to a compound additive for coal water slurry. Low temperature coal tar is used as the initial raw material, the addition amount of the low temperature coal tar is 1-8 wt% of the dry basis of coal, and two sulfonating agents are selected to carry out sulfonation reaction, thereby obtaining the compound additive for coal water slurry; and the pH value of the additive is 7-9. The invention is characterized in that the preparation method comprises the following steps: (1) preparation of sulfonating agents; (2) sulfonation reaction; and (3) preparation of additive. The invention has the advantage of wide material source and low cost, thereby greatly lowering the production cost. The invention also has the advantages of simple preparation technique and equipment, and high production efficiency, so the coal water slurry preparation plant can produce the additive on the spot.

Description

technical field [0001] The invention relates to a composite coal-water slurry additive, which is suitable for the preparation of high-concentration and high-stability coal-water slurry. Background technique [0002] Coal-water slurry is a new type of clean, low-emission and environmentally friendly coal-based fluid fuel that emerged in the 1980s with the goal of replacing oil. It is a slurry mixture made of 60%-70% of solid coal with different particle sizes, 30%-40% of water and 0.5-1.5% of compound additives. Because the coal-water slurry not only maintains the original physical properties of coal, but also has good fluidity and long-term stability like oil, it can be pumped and pipelined, and can be safely stored and transported. It can be atomized and burned, and save energy. Energy is widely used in power plant boilers, industrial boilers and industrial kilns, replacing coal, oil and natural gas as fuel. It can also be used as a raw material for the production of wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/24C10L1/32
Inventor 陈渝生陈国瑞冷佳晨徐九哎毛俊方蒋幼生
Owner JIANGSU SHENHUA DERUI NEW ENERGY
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