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Efficient coal slime gas dissolving and dewatering process

A technology of coal slime water and dissolved air, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problems of high water holding capacity, low calorific value, fine particle size, etc., and achieve filter press efficiency Improvement, dehydration effect improvement, filter press effect improvement effect

Pending Publication Date: 2021-05-14
韩臻
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coal slime water concentration is low (solid content 8%-10%), after classification and separation, concentration and sedimentation, pressure filtration and dehydration and other process steps, coal slime is finally formed, but still has relatively high water content (water content 20% to 24%) , relatively fine particle size (-0.25mm), high viscosity, high water holding capacity and low calorific value

Method used

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  • Efficient coal slime gas dissolving and dewatering process
  • Efficient coal slime gas dissolving and dewatering process
  • Efficient coal slime gas dissolving and dewatering process

Examples

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Effect test

Embodiment 1

[0039] This embodiment provides a high-efficiency coal slime dissolved gas dehydration process. According to the high-efficiency coal slime dissolved gas dehydration process according to the specific embodiment of the present invention, the process includes: sequentially classifying and sorting the coal slime water, concentrating and precipitating, and pressing and filtering Dehydration, finally forming coal slime; before entering the filter press dehydration, increase the dissolved gas process, the gas dissolved process is: the pressurized gas is mixed into the slime water through the gas device, and then enters the mixing pump, and the impeller rotates at a high speed, and the gas and The coal slime water is broken up, and the formed micro-bubbles fully collide with the coal particles, so that the coal slime water is mineralized by air bubbles, and a gas-dissolved coal slime water with a three-phase mixed system of solid, liquid and gas is formed.

Embodiment 2

[0041]This embodiment provides a high-efficiency coal slime dissolved gas dehydration process. According to the high-efficiency coal slime dissolved gas dehydration process according to the specific embodiment of the present invention, the process includes: sequentially classifying and sorting the coal slime water, concentrating and precipitating, and pressing and filtering Dehydration, finally forming coal slime; before entering the filter press dehydration, increase the dissolved gas process, the gas dissolved process is: the pressurized gas is mixed into the slime water through the gas device, and then enters the mixing pump, and the impeller rotates at a high speed, and the gas and The coal slime water is broken up, and the formed micro-bubbles fully collide with the coal particles, so that the coal slime water is mineralized by air bubbles, and a gas-dissolved coal slime water with a three-phase mixed system of solid, liquid and gas is formed.

[0042] Further, when the pr...

Embodiment 3

[0046] This embodiment provides a high-efficiency coal slime dissolved gas dehydration process. According to the high-efficiency coal slime dissolved gas dehydration process according to the specific embodiment of the present invention, the process includes: sequentially classifying and sorting the coal slime water, concentrating and precipitating, and pressing and filtering Dehydration, finally forming coal slime; before entering the filter press dehydration, increase the dissolved gas process, the gas dissolved process is: the pressurized gas is mixed into the slime water through the gas device, and then enters the mixing pump, and the impeller rotates at a high speed, and the gas and The coal slime water is broken up, and the formed micro-bubbles fully collide with the coal particles, so that the coal slime water is mineralized by air bubbles, and a gas-dissolved coal slime water with a three-phase mixed system of solid, liquid and gas is formed.

[0047] Further, when the p...

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Abstract

The invention relates to an efficient coal slime gas dissolving and dewatering process. The process comprises the following steps: sequentially carrying out grading separation, concentration precipitation and filter pressing dehydration on coal slime water to finally form coal slime; and adding a gas dissolving process before filter pressing dehydration. The gas dissolving process comprises the following steps: mixing pressure gas into the coal slime water through a gas device, then feeding the mixture into a mixing pump, dispersing the gas and the coal slime water through high-speed rotation of an impeller, and enabling formed microbubbles to be fully collided and jointed with coal particles, so that the coal slime water is subjected to bubble mineralization treatment. The gas-dissolved coal slime water of a solid-liquid-gas three-phase mixed system is formed, and the coal slime water is subjected to bubble mineralization treatment and then subjected to filter pressing, so that the filter pressing dehydration efficiency can be greatly improved.

Description

technical field [0001] The invention relates to a coal slime dehydration process, in particular to a high-efficiency coal slime dissolved gas dehydration process. Background technique [0002] The coal slime comes from the coal slime water (coal slime particle size diameter is generally 0-0.25mm), and the residual tailings after the classification and separation process. Coal slime water concentration is low (solid content 8%-10%), after classification and separation, concentration and sedimentation, pressure filtration and dehydration and other process steps, coal slime is finally formed, but still has relatively high water content (water content 20% to 24%) , relatively fine particle size (-0.25mm), high viscosity, high water holding capacity and low calorific value. The main components are coal powder, clay minerals, and their mudification. Adding flocculant (polyacrylamide) drugs during the concentration process promotes the aggregation of particles to form larger aggr...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/122
CPCC02F11/122C02F11/00
Inventor 韩臻
Owner 韩臻
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