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Preparation method of coal water slurry with dispersion stability

A dispersion stability, coal-water slurry technology, applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve the problems of complex operation, high water absorption, rough flow pattern, etc., to reduce the storage area and the amount of water separated Less, more stable effect

Active Publication Date: 2016-10-12
佛山市南海港能燃料物料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention: in the process of preparing coal-water slurry at present, although the commonly used naphthalene sulfonate polycondensate has strong slurrying property and viscosity-reducing effect, it has poor stability, is easy to produce precipitation and has high water absorption rate, and Although the lignosulfonate dispersant is cheap, good in stability and less in water separation, it has high viscosity and rough flow pattern, and needs to be used in combination with other dispersants, which makes the operation complicated and cumbersome. It provides a wheat fiber Mix it with bamboo pulp black liquor, adjust the pH value with sodium hydroxide, add ferric chloride and oleum to carry out sulfonation reaction, after the reaction, suction filter to obtain filter residue, set aside, then mix cornstarch, ammonium persulfate and deionized water , after adjusting the pH value, add ferrous sulfate, filter residue, methyl methacrylate, butyl acrylate, and dodecyl mercaptan for a mixed reaction to obtain a dispersant, then mix with coal powder and water, stir and dry to obtain a slurry, and finally pass Shear treatment, thereby obtain the preparation method of dispersion stability coal-water slurry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First weigh 250g of coal, first dry the coal in an oven at 110°C for 10 hours, grind and sieve to obtain 60-mesh coal powder after drying, then weigh 200g of coal and add it to a ceramic ball mill for ball milling for 25min, then sieve after ball milling To obtain 150 mesh coal powder, add 60 mesh coal powder and 150 mesh coal powder into a high-speed stirrer, stir for 15 minutes at a speed of 150 r / min, and set aside after stirring; then weigh 150 g of wheat fiber, and mix it with Mix the bamboo pulp black liquor, put the mixture into the reactor, set the temperature of the reactor to 60°C, adjust the pH value to 10 with 30% sodium hydroxide solution by mass fraction, add 0.5g ferric chloride after adjustment, and Add 3% oleum of total mass to the reactor while stirring under temperature, stir and react for 1h, cool to room temperature after the reaction, vacuum filter the reactant to obtain filter residue; then weigh 15g of cornstarch and add it to a 500mL three-necked...

example 2

[0020]First weigh 300g of coal, first dry the coal in an oven at 115°C for 11 hours, after drying, grind and sieve to obtain 70-mesh coal powder, then weigh 230g of coal and add it to a ceramic ball mill for ball milling for 30 minutes, then sieve after ball milling To obtain 160 mesh coal powder, add 70 mesh coal powder and 160 mesh coal powder into a high-speed stirrer, stir at 180r / min for 18min, and set aside after stirring; then weigh 180g of wheat fiber and mix with Mix the bamboo pulp black liquor, put the mixture into the reactor, set the temperature of the reactor to 75°C, adjust the pH value to 10.5 with 30% sodium hydroxide solution by mass fraction, add 0.6g ferric chloride after adjustment, and Add 4% of the total mass of oleum to the reaction kettle while stirring at low temperature, stir for 1.5 hours, cool to room temperature after the reaction, and vacuum filter the reactant to obtain a filter residue; then weigh 20g of cornstarch and add it to a 500mL three-ne...

example 3

[0023] First weigh 350g of coal, dry the coal in an oven at 120°C for 12 hours, grind and sieve to obtain 80-mesh coal powder after drying, then weigh 250g of coal and add it to a ceramic ball mill for ball milling for 35 minutes, then sieve after ball milling To obtain 180 mesh coal powder, add 80 mesh coal powder and 180 mesh coal powder into a high-speed stirrer, stir at 200r / min for 20min, and set aside after stirring; then weigh 200g of wheat fiber and mix with Mix the bamboo pulp black liquor, put the mixture into the reactor, set the temperature of the reactor to 90°C, adjust the pH value to 11 with 30% sodium hydroxide solution by mass fraction, add 0.7g ferric chloride after adjustment, and Add 5% of the total mass of fuming sulfuric acid to the reaction kettle while stirring under temperature, stir for 2 hours, cool to room temperature after the reaction, and vacuum filter the reactant to obtain a filter residue; then weigh 30g of cornstarch and add it to a 500mL thre...

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Abstract

The invention discloses a preparation method of coal water slurry with dispersion stability and belongs to the technical field of preparation of the coal water slurry. The preparation method of the coal water slurry comprises the steps that wheat fibers and bamboo pulp black liquor are mixed, the pH value is regulated with sodium hydroxide, then ferric chloride and oleum are added to the mixture for a sulfonation reaction, suction filtration is performed after the reaction, and a filter residue is obtained for standby application; corn starch, ammonium persulfate and deionized water are mixed, the pH value is regulated, then ferrous sulfate, the filter residue, methyl methacrylate, butyl acrylate, 1-dodecanethiol are added for a mixed reaction, and a dispersing agent is obtained; the dispersing agent is mixed with pulverized coal and water, a mixture is stirred and dried, slurry is obtained and subjected to shearing treatment finally, and the coal water slurry with dispersion stability is obtained. Examples prove that the operation is simple and convenient, the raw materials are easily available, the prepared coal water slurry has the advantages of good slurry flow pattern, high stability, low viscosity and excellent performance, can meet industrial production requirements and can realize excellent performance without compositing with other dispersing agents, and the process is environment-friendly.

Description

technical field [0001] The invention discloses a method for preparing dispersion-stabilized coal-water slurry, which belongs to the technical field of coal-water slurry preparation. Background technique [0002] my country is a country rich in coal, poor in oil, and low in gas. Coal resources have been found to reach 1,014.102 billion tons, accounting for more than 80% of fossil energy. Oil resources are relatively short, with proven reserves of only 3 tons per capita, and consumption is growing rapidly. . Coal-water slurry is a low-pollution, high-efficiency, pipeline-transportable oil-substituting coal-based fluid fuel that is obtained through physical processing of about 65% by mass of coal, 34% by mass of water and 1% by mass of additives. It is crushed and blended with water and surface-active dispersant solution to prepare a slurry fluid, which is then burned like heavy oil under power transmission. Burning can save a lot of oil resources. It not only maintains the or...

Claims

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Application Information

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IPC IPC(8): C10L1/32C10L1/192C10L1/18C10L1/12C10L1/19C10L1/24
CPCC10L1/106C10L1/1225C10L1/1275C10L1/1817C10L1/19C10L1/192C10L1/2406C10L1/326
Inventor 陈毅忠张明王统军
Owner 佛山市南海港能燃料物料有限公司
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