Sludge coal-water slurry and preparation method thereof

A technology of coal-water slurry and sludge water, which is applied in the field of sludge-coal-water slurry and its preparation, can solve the problems of excessive addition of dispersant and stabilizer, increase of pulping cost, etc., and achieve saving of pulping cost and fluidity Good, simple pulping process

Active Publication Date: 2012-10-17
CHINA COAL RES INST CCRI ENERGY SAVING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sludge coal-water slurry prepared by the Chinese patent with the publication number CN101270878A has a calorific value of 4000kcal / kg, the amount of sludge added does not exceed 10%, and the amount of dispersant and stabilizer added is too much, resulting in increased pulping costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1, prepare sludge coal-water slurry

[0026] (1) Raw materials

[0027] Yanzhou coal powder (moderately metamorphic bituminous coal), analytical water 2.64%, ash content 6.29%, particle size less than 3mm;

[0028] The sludge produced by a sewage treatment plant in Shenzhen has a moisture content of about 70%;

[0029] Coal slurry dispersant: sodium lignosulfonate;

[0030] Modifier: a copolymer of humic acid and acrylic acid at 50°C;

[0031] (2) Preparation of coal water slurry

[0032] Mix 70 parts of sludge produced by a sewage treatment plant in Shenzhen, 30 parts of printing and dyeing wastewater (with a water content of 95%) and 0.003 parts of modifier, stir for 30 minutes under high shear conditions, and stand still for 1 hour to 3 days to obtain Modified sludge with better fluidity;

[0033] The modified sludge obtained by the above method, dispersant for coal slurry (sodium lignin sulfonate), Yanzhou coal powder and water are mixed and ground t...

Embodiment 2

[0036] Embodiment 2, prepare coal-water slurry

[0037] (1) Raw materials

[0038] Lu'an coal powder (lean and lean coal), total water 2.86%, ash content 10.71%, particle size less than 3mm;

[0039] The sludge produced by a sewage treatment plant in Shenzhen has a moisture content of about 70%;

[0040] Coal slurry dispersant: humate

[0041] Modifier: a copolymer of humic acid and acrylic acid at 100°C;

[0042] (2) Preparation of coal water slurry

[0043] Mix 80 parts of sludge produced by a sewage treatment plant in Shenzhen, 20 parts of printing and dyeing wastewater (with a water content of 95%) and 0.005 part of modifier, stir for 20 minutes under high shear conditions, and stand still for 1 hour to obtain a relatively fluidity Good modified sludge;

[0044] The modified sludge obtained above, Lu'an coal powder and water were mixed and ground to obtain a coal-water slurry with a concentration of 61.6%. Among them, the modified sludge, dispersant for coal slurry, L...

Embodiment 3

[0047] Embodiment 3, prepare coal-water slurry

[0048] (1) Raw materials

[0049] Lu'an coal powder, total water 2.86%, ash content 10.71%, particle size less than 3mm;

[0050] The sludge produced by a sewage treatment plant in Shenzhen has a moisture content of about 70%;

[0051] Dispersant for coal slurry: humate

[0052] Modifier: a copolymer of humic acid and acrylic acid at 100°C;

[0053] (2) Preparation of coal water slurry

[0054]Mix 50 parts of sludge produced by a sewage treatment plant in Shenzhen, 50 parts of printing and dyeing wastewater (with a water content of 95%) and 0.005 modifier, stir for 30 minutes under high shear conditions, and stand still for 30 minutes to obtain a fluid with good fluidity. Modified sludge;

[0055] Mix and grind the modified sludge and coal slurry obtained above with a dispersant (humate), Lu’an coal powder and water to obtain a coal-water slurry with a concentration of 63.8%. Among them, the modified sludge and coal slurry ...

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Abstract

The invention discloses sludge coal-water slurry and a preparation method thereof. The sludge coal-water slurry comprises the following components in parts by weight: 5-30 parts of water-treatment sludge, 5-30 parts of printing and dyeing wastewater, 0.0005-0.1 part of modifier, 60-70 parts of coal powder and 10-30 parts of water. The preparation method provided by the invention has the advantages that the slurrying process is simple, and energy and the slurrying cost are saved; the added amount of the water-treatment sludge is high, and the fluidity of the modified sludge is good, so that the sludge is easy to mix with the coal powder uniformly; the slurrying concentration of the sludge coal slurry is higher than 60%, and the fluidity, the stability and the rheological property are relatively good; additives can be saved by more than 40%, water for slurrying can be partially or wholly saved, and a stabilizer can be saved by 100%; and while the heat value of the sludge is fully utilized, an effective technical path is provided for reclamation, reduction and harmlessness of the sludge.

Description

technical field [0001] The invention relates to a sludge coal-water slurry and a preparation method thereof, in particular to a sludge coal-water slurry prepared from sludge and printing and dyeing wastewater and a method thereof. Background technique [0002] Coal-water slurry is a new type of coal-based fuel developed after the world oil crisis in the 1970s. It has the advantages of convenient transportation, high combustion efficiency, and low pollutant emissions. It can be used in power plant boilers, industrial boilers and industrial kilns instead of fuel oil. [0003] As a new type of coal-based fuel, coal water slurry has been successfully used in power station boilers, industrial boilers and kilns as a fuel for oil instead of coal after years of research and development in my country since 1982, and has achieved good economic benefits and environmental benefits. According to incomplete statistics, by the end of 2011, the designed production capacity of various pulp ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
Inventor 何国锋段清兵王国房张胜局郭志新梁兴贾传凯王燕芳颜淑娟杜丽伟张桂玲莫日根刘烨伟温泉孙海勇赵力明苏鑫
Owner CHINA COAL RES INST CCRI ENERGY SAVING TECH CO LTD
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