Method for preparing gas-bubble water-coal slurry or water-coke slurry by utilizing sludge and organic waste liquid through fermentation

A technology of organic waste liquid and water coke slurry, which is applied in the direction of liquid carbon-containing fuel, petroleum industry, fuel, etc., can solve the problems of unsatisfactory stabilization effect and short stabilization time of only 1-2 days, so as to save pulping cost , prevent coalescence and sedimentation, reduce the effect of additives

Inactive Publication Date: 2017-02-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

These additives (including dispersants and stabilizers) have good effects in the preparation of coal water slurry, but they must be matched with the characteristics of coal quality, and additives must be replaced frequently to meet the requirements of coal types, especially for water coke slurry. Said that the stabilization effect is not ideal, the short stabilization time is only 1-2 days, and the long one is only about a week

Method used

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  • Method for preparing gas-bubble water-coal slurry or water-coke slurry by utilizing sludge and organic waste liquid through fermentation
  • Method for preparing gas-bubble water-coal slurry or water-coke slurry by utilizing sludge and organic waste liquid through fermentation
  • Method for preparing gas-bubble water-coal slurry or water-coke slurry by utilizing sludge and organic waste liquid through fermentation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0028]This example uses petroleum coke, sludge, starch factory waste liquid, and a small amount of additives to make sludge waste water coke slurry, and compares the difference in the effect of starch factory waste liquid and clean water in pulping. When making pulp, keep the mass ratio of petroleum coke, sludge and additives constant, and by changing the amount of waste liquid (or clean water) in the starch factory, mixed slurries with solid mass concentrations of 50%, 57% and 65% are prepared respectively , the mass proportions of the components under the three concentrations are: ① 50% concentration slurry: 47.8% petroleum coke, 42.4% waste liquid (or clean water) from starch factory, 9.5% sludge, 0.3% additive; ② 57% concentration slurry Body: petroleum coke 54.4%, starch factory waste liquid (or clear water) 34.3%, sludge 10.9%, additive 0.4%; ③ 65% concentration slurry: petroleum coke 62.0%, starch factory waste liquid (or clear water) 25.0%, sewage mud 12.5%, additives ...

Embodiment 2

[0040] (1) Implementation method

[0041] Due to the extremely poor stability of the water coke slurry made from petroleum coke, the stability of coal water slurry is much better under the same conditions. Therefore, this example studies the fermentation of sludge and organic waste liquid to produce air bubbles The effect on the stability of water coke slurry.

[0042] The solid mass concentration of the mixed slurry that makes in this example is 62%, and the mass proportion of each raw material component is: petroleum coke 59.1%, organic waste liquid 28.4%, sludge 12.0% (according to sludge water content 80% Converted), additive 0.5%.

[0043] The organic waste liquids used in this example are respectively taken from breweries, starch factories, meat processing plants and catering wastewater, and their chemical oxygen demand (COD) is 2480mg / L, 5910mg / L, 9220mg / L, 11900mg / L respectively. L, waste liquids with different chemical oxygen demand are represented as W1, W2, W3, W4...

Embodiment 3

[0059] (1) Implementation method

[0060] This example uses coal, sludge, winery waste liquid (or clear water), and a small amount of additives to make sludge waste liquid coal-water slurry, and investigates the influence of sludge and brewery waste liquid on the slurrying effect.

[0061] The coal used in this example is Datong bituminous coal, the organic waste liquid is taken from a winery, and the chemical oxygen demand (COD) is 2480mg / L; the sludge is the remaining activated sludge from Hangzhou Qige Sewage Plant, with a moisture content of about 89% ; The additive is sodium lignosulfonate.

[0062] The solid mass concentration of all the slurries prepared in this example is about 60%, and the mass ratio of each component is: ① ordinary clear water coal-water slurry: clear water 40.0%, coal 59.6%, additive 0.4%; ② sludge clear water Coal water slurry: coal 57.6%, clear water 32.0%, sludge 10.0% (converted according to the moisture content of 80%), additives 0.4%; ③ sludg...

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Abstract

The invention relates to a technique for improving the dispersibility and the stability of water-coal slurry / water-coke slurry, and aims at providing a method for preparing gas-bubble water-coal slurry or water-coke slurry by utilizing sludge and organic waste liquid through fermentation. The method comprises the following steps of blending coal powder / petroleum coke, the sludge and the organic waste liquid with a water-coal slurry additive / water-coke slurry additive, and preparing the water-coal slurry, which can ferment per se to generate gas bubbles, from an obtained mixture, wherein a relation among all raw-material components in percentages by mass concentration is that the percentage of the coal powder or petroleum coke powder is 47.8 to 62.0 percent, the percentage of the sludge which is converted according to moisture content of 80 percent is 9.5 to 12.5 percent, the percentage of the organic waste liquid is 25.0 to 42.4 percent, and the percentage of the water-coal slurry additive or the water-coke slurry additive is 0.3 to 0.5 percent. In the method provided by the invention, microorganisms in the sludge and the organic waste liquid are fermented to generate the gas bubbles; in a storage process, the gas bubbles are diffused inside a slurry body; the dispersibility and the stability of the slurry body are improved; the method is easy to realize, and is convenient to operate; slurry making raw materials are low in costs; the use level of the additive can be decreased by 40 percent; the slurry making cost is saved drastically; the purposes of utilizing waste and reducing environmental pollution are realized.

Description

technical field [0001] The invention relates to a technical route and method for improving the dispersibility and stability of coal-water slurry / water-coke slurry, in particular to mixing sludge, coal or petroleum coke, water or organic waste liquid, etc. to prepare air-filled coal-water slurry / coke slurry Water coke slurry, a technical route and method for improving the dispersion and stability of slurry by using sludge and organic waste liquid to produce gas by self-fermentation. Background technique [0002] With the rapid development of China's economy and society, the demand for energy continues to increase, which has caused my country's energy supply to be in a state of tension in recent years, which has become a bottleneck in the development of the national economy. In particular, the consumption of high-quality energy such as oil and natural gas has shown an accelerated growth trend in recent years. my country has become a net importer of oil since 1993, and the gap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32
CPCC10L1/326
Inventor 刘建忠王睿坤程军王智化杨卫娟张彦威何勇周志军黄镇宇周俊虎岑可法
Owner ZHEJIANG UNIV
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