Coal water slurry additive and preparation method and application thereof

A technology of coal water slurry and additives, applied in fuel, liquid carbon-containing fuel, petroleum industry, etc., can solve the problems of high cost and narrow range of coal types, achieve the effect of less dosage, best effect, and lower use cost

Active Publication Date: 2010-06-16
CHINA COAL RES INST CCRI ENERGY SAVING TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although China has done a lot of research on coal water slurry 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

[0015] Put the four-neck flask equipped with electric stirring, condenser, addition funnel and thermometer on the oil bath. Weigh 1.0 moles of industrially purified washing oil (coal tar boiling range 230~300°C fraction, the main components are methylnaphthalene, biphenyl, indole, acenaphthene, etc. Wherein, the phenol content is not more than 0.5%, and the naphthalene content Not more than 15%, moisture not more than 1.0%) into the four-necked flask. At 145°C, 1.65 mol of sulfuric acid was added and reacted for 4 hours. After the sulfonation is complete, cool down. At 80° C., 0.2 mol of p-aminobenzenesulfonic acid, 0.2 mol of phenol and 0.85 mol of formaldehyde were added, and kept at 95° C. for 3 hours. After polycondensation, neutralize with sodium hydroxide until the pH value is 8.0, put it into an oven for drying, take it out after drying, grind it into powder while it is hot, and obtain sample 1#.

[0016] Use sample 1# to do the slurrying test, the test steps are as ...

Embodiment 2

[0021] Put the four-neck flask equipped with electric stirring, condenser, addition funnel and thermometer on the oil bath. Weigh 1.0 mole of industrially purified washing oil and put it into a four-necked flask. Add 1.5 mole of sulfuric acid at 120°C for 3 hours. After the sulfonation is complete, cool down. At 80°C, 0.1 mole of sodium diaminobenzenesulfonate, 0.1 mole of resorcinol and 0.7 mole of formaldehyde were added, and kept at 80°C for 2 hours. After the polycondensation, it was neutralized with ammonia water until the pH value was 7.0, put into an oven for drying, and after drying, it was taken out while hot and ground into powder to obtain sample 2#.

[0022] Sample 2# was used for pulping test, and the results are shown in Table 2.

[0023] Table 2, 2# additive sample pulping test results

[0024] coal type

[0025] Explanation: It can be seen from Table 2 that under the conditions of Example 2, the highest slurry concentrations of the four kinds of c...

Embodiment 3

[0027] Put the four-neck flask equipped with electric stirring, condenser, addition funnel and thermometer on the oil bath. Weigh 1.0 mole of industrially purified washing oil and put it into a four-necked flask. At 170°C, 1.8 moles of sulfuric acid was added to react for 5 hours. After the sulfonation is complete, cool down. At 80°C, 0.3 mole of sodium methylaminobenzenesulfonate, 0.3 mole of bisphenol A and 1.0 mole of formaldehyde were added, and kept at 110°C for 4 hours. After polycondensation, neutralize with potassium hydroxide to a pH value of 9.0, put it in an oven for drying, take it out after drying, and grind it into powder while it is hot to obtain sample 3#.

[0028] Sample 3# was used for pulping test, and the results are shown in Table 3.

[0029] Table 3. Pulping test results of 3# additive samples

[0030] coal type

[0031] Explanation: It can be seen from Table 3 that under the conditions of Example 3, the highest slurry concentrations of the ...

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PUM

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Abstract

The invention discloses a coal water slurry additive and a preparation method and application thereof. The method is characterized in that the coal tar fraction wash oil is taken as the starting material, carries out sulfonation reaction with a sulfonating agent and then carries out polycondensation reaction with aminobenzene sulfonate, phenols and formaldehyde; and neutralization is carried out after reaction is completed. The method can greatly lower the production cost, and the obtained additive has the advantages of small mixing amount, excellent dispersibility, good slurry forming ability and stability and reduction of the stabilizing agent in the coal water slurry. The additive can not only be independently used for preparing the coal water slurry, but also be used by being compounded with other types of additives, such as naphthalene sulfonate-formaldehyde condensates, polycarboxylic acid additives or lignosulfonate and other anionic surfactants and synthesize the coal water slurry suitable for different types of coal by adjusting the production conditions. The coal water slurry prepared by the additive has the solid content between 63% and 70% and is easy to flow and clean. The viscosity of the coal water slurry is controlled below 1200mPa.s at the shearing rate of 100s<-1>.

Description

technical field [0001] The invention relates to a coal water slurry additive and its preparation method and application. Background technique [0002] Coal water slurry (CWM, coal water slurry) is a new type of low-pollution oil substitute fuel, which is a mixture made of 60-70% coal of different particle sizes, 30-40% water and about 1% additives. It not only maintains the original physical properties of coal, but also has the same fluidity and stability as oil. It can be easily stored, pipelined, and atomized to burn like oil, and it is called a liquid coal product. Since the combustion efficiency of coal water slurry can be as high as 95%, and the emission of sulfur dioxide and nitrogen oxides and the concentration of smoke and dust all meet the environmental protection requirements, it is widely used in power station boilers, industrial boilers and industrial kilns to replace coal, oil and gas. Combustion can also be used as gasification raw material for Texaco gasifica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/24C10L1/32C08G14/073
Inventor 何国锋王国房郭志新梁兴段清兵贾传凯
Owner CHINA COAL RES INST CCRI ENERGY SAVING TECH CO LTD
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