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High concentration sludge coal slurry and method for preparing the same

A high-concentration, sludge technology, applied in the petroleum industry, liquid carbon-containing fuel, fuel, etc., can solve the problems of increasing the process cost of sludge and coal slurry, and achieve the effects of low cost, low energy consumption and simple operation

Inactive Publication Date: 2007-02-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sludge contains a large amount of complex organic matter, and it is easy to produce toxic and harmful gases after heat treatment
Existing patented technologies, such as U.S. Patent 99814537.8, have the disadvantage that the denaturation operation before preparing sludge coal slurry produces toxic and harmful gases, which increases the process cost of sludge coal slurry preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Raw material

[0028] (1) Sewage sludge produced by a sewage treatment plant in Shanghai, water content ------80%, weight;

[0029] (2) Lump coal from a coal mine, water content ------ 2%, ash content ------ 15%;

[0030] (3) Additive (sodium lignosulfonate)

[0031] (4) Sludge modifier (calcium carbonate)

[0032] (5) Tap water

[0033] 2. Preparation conditions

[0034] (1) Raw material ratio (parts by weight)

[0035] 100 parts of coal, 25 parts of hydrous sludge, 45 parts of water, 1 part of additive, and 1 part of sludge modifier.

[0036] (2) Preparation method

[0037] Firstly, the sewage sludge is fully mixed with the sludge modifying agent, and left for 4 hours to obtain the modified sludge. Then grind and mix the modified sludge, coal, water and additives to make a high-concentration sludge-coal slurry

[0038] 3. Product performance indicators

[0039] (1) Appearance shape --- gray black paste. At 25°C, the apparent viscosity is below 1000mPa·s, ...

Embodiment 2

[0045] 1. Raw material

[0046] (1) Sewage sludge produced by a sewage treatment plant in Shanghai, water content ------80%, weight;

[0047] (2) Lump coal from a coal mine, water content ------ 2%, ash content ------ 8%;

[0048] (3) Additive (sodium methylnaphthalenesulfonate formaldehyde condensate)

[0049] (4) Sludge modifier (calcium hydroxide)

[0050] (5) Tap water

[0051] 2. Preparation conditions

[0052] (1) Raw material ratio (parts by weight)

[0053] 150 parts of coal, 45 parts of hydrous sludge, 58 parts of water, 1.5 parts of additives, and 1 part of sludge modifier.

[0054] (2) Preparation method

[0055] First, the sewage sludge is fully mixed with the sludge modifying agent, and left for 3 days to obtain the modified sludge. Then grind and mix the modified sludge, coal, water and additives to make a high-concentration sludge-coal slurry

[0056] 3. Product performance indicators

[0057] (1) Appearance shape --- gray black paste. At 25°C, the app...

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Abstract

The invention discloses high-density sludge slurry and preparing method, which comprises the following parts: 100-200wt% coal powder, 10-50wt% sludge with water, 10-100wt% water, 1-5wt% water, 1-5wt% addictive and 1-5wt% sludge modifying agent.

Description

technical field [0001] The invention relates to a sludge coal slurry and a preparation method thereof. Background technique [0002] Coal-water slurry is a new coal-based fluid fuel that replaced oil with coal after the world oil crisis in the 1970s. It converts coal from a traditional solid fuel into a fluid fuel, thus bringing many advantages. Like oil, coal water slurry can be pumped, atomized, stored and stably ignited, burned and gasified. [0003] The rational treatment and resource utilization of water-containing sludge is a major issue in sewage treatment and environmental protection. Among the various aqueous sludge treatment methods at present, the heat treatment method is the most promising. Sludge heat treatment can not only reduce the amount of sludge quickly and to a large extent, but also make use of the calorific value in the sludge to a certain extent. However, the sludge contains a large amount of water, generally up to about 80%, and the existing heat t...

Claims

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Application Information

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IPC IPC(8): C10L1/32
Inventor 刘海峰李伟锋周晶武龚欣于遵宏王辅臣于广锁王亦飞周志杰代正华陈雪莉梁钦锋郭晓镭王兴军
Owner EAST CHINA UNIV OF SCI & TECH
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