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High-concentration sludge coal slurry, preparation method and application thereof

A high-concentration, sludge technology, applied in the manufacture of combustible gas, gasification process, petroleum industry, etc., can solve the problems of high energy consumption and low efficiency, and achieve low energy consumption, simple process flow and strong operability. Effect

Active Publication Date: 2018-12-07
CCTEG CLEAN ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned sludge treatment methods are mainly dehydration reduction or direct incineration, which consumes a lot of energy and has low efficiency, and it is difficult to make full use of the calorific value of the sludge due to its high water content.

Method used

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  • High-concentration sludge coal slurry, preparation method and application thereof

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Effect test

preparation example Construction

[0059] A kind of preparation method of high concentration sludge coal slurry, such as figure 1 shown, including the following steps:

[0060] (1) Carrying out shear refinement of the coal-water slurry, modified sludge, water and additives to obtain the first slurry;

[0061] (2) Carrying out shearing and thinning raw coal, water, additives and part of the first slurry to obtain the second slurry;

[0062] (3) Screening and removing impurities from the remaining first slurry and the second slurry to obtain the third slurry, part of the third slurry is returned to step (1) for replacing the coal water slurry in step (1), The remaining third slurry is the high concentration sludge coal slurry.

Embodiment 1

[0064] The raw coal used for the finished coal slurry and the crushed coal is low-rank coal in Yulin, Shaanxi, where the analytical water Mad is 2.32%, the total water Mt is 11.2%, the ash Aad is 9.89%, and the volatile Vdaf is 38.93%. The sludge used was produced by a sewage treatment plant of a coal chemical enterprise in Yulin, in which the analysis water Mad was 11.92%, the total water Mt was 81.63%, the ash content Ad was 52.72%, and the calorific value Qgr,d was 10.75MJ kg -1 .

[0065] Finished coal slurry is raw coal crushed to ≤6mm, mixed with water and additives at a ratio of 122:76:0.2 and then wet-grinded; the mass concentration of finished coal slurry is 61%, and its maximum particle size is ≤2.4mm. The fluidity index of slurry is 12cm. The fluidity index test of coal slurry refers to the test method of "fluidity of cement paste" in the industry standard of "GB / T8077-2012 Concrete Admixture Homogeneity Test Method" of cement. The stability of coal slurry is 2 Hou...

Embodiment 2

[0071] The raw coal used for the finished coal slurry and the crushed coal is low-rank coal in Yulin, Shaanxi, where the analytical water Mad is 2.32%, the total water Mt is 11.2%, the ash Aad is 9.89%, and the volatile Vdaf is 38.93%. The sludge used was produced by a sewage treatment plant of a coal chemical enterprise in Yulin, in which the analysis water Mad was 11.92%, the total water Mt was 81.63%, the ash content Ad was 52.72%, and the calorific value Qgr,d was 10.75MJ kg -1 .

[0072] Finished coal slurry is raw coal crushed to ≤6mm, mixed with water and additives in a ratio of 113.8:76:0.2 and then wet-grinded; the mass concentration of finished coal slurry is 60%, and its maximum particle size is ≤3.0mm. The fluidity index of slurry is 12cm. The fluidity index test of coal slurry refers to the test method of "fluidity of cement paste" in the industry standard of "GB / T8077-2012 Concrete Admixture Homogeneity Test Method" of cement. The stability of coal slurry is 2 H...

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Abstract

The invention provides high-concentration sludge coal slurry, a preparation method and an application thereof. The mass concentration of the high-concentration sludge coal slurry is 64%-68%, the masspercent of sludge is 1%-30%, the mass percent of coal powder is 30%-68%, and the proportion between the dry base content of particles with the granularity being less than or equal to 75mum in the sludge coal slurry and the total base content of the sludge coal slurry is more than or equal to 30%. The high-concentration sludge coal slurry, the preparation method and the application provided by theinvention have the beneficial effects that the mass concentration of the coal water slurry is at least increased by 3-6 percent points, the fluidity, stability and atomizing property of the coal slurry are respectively greatly improved, the sludge treating cost is reduced, the heat value of the sludge is also effectively utilized, the process flow is simple, the operability is strong, the energy consumption is low, the production requirements for long-period safety and continuity are met, and the high-concentration sludge coal slurry can meet the requirements of gasification and burning of thecoal water slurry.

Description

technical field [0001] The invention belongs to the technical field of coal-water slurry, and relates to a high-concentration sludge coal slurry, a preparation method and application thereof, in particular to a high-concentration sludge coal slurry prepared by sludge modification, a preparation method and application thereof. Background technique [0002] Sludge is the largest by-product in the process of sewage treatment. With the rapid development of industrialization and urbanization in my country, the output of industrial and urban sewage continues to increase, and the amount of sludge produced by sewage treatment is also increasing. At present, the sludge treatment methods at home and abroad are mainly landfill and incineration. In my country, due to landfill site and transportation costs and other restrictions, only some areas use landfill treatment technology to treat sludge. However, there are still problems such as heavy metals and other hazardous components seepin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32C10J3/00
CPCC10J3/00C10J2300/0926C10L1/326C10L2230/22C10L2290/24C10L2290/28C10L2290/546
Inventor 何国锋段清兵吕向阳张胜局王冉柳金秋赵力明徐明磊刘烨炜陈浩
Owner CCTEG CLEAN ENERGY CO LTD
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