High-carbon pulverized coal ash/coal slag decarbonization and classification method and device

A classification method, fly ash technology, applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems that cannot meet the efficient utilization of fly ash, improve environmental and social benefits, and improve utilization rate , the effect of considerable economic benefits

Inactive Publication Date: 2014-07-23
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing technologies including the above-mentioned patents have not fully utilized fly ash to serve the social economy, and are far from satisfying the situation of high-efficiency utilization of fly ash

Method used

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  • High-carbon pulverized coal ash/coal slag decarbonization and classification method and device

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Effect test

Embodiment 1

[0065] Embodiment 1: Fly ash treatment of a power plant with a total installed capacity of 2 million KW

[0066] For a power plant with a total installed capacity of 2 million KW, a set such as figure 1 The fly ash decarbonization separation process shown, its specific operation process and effect are described as follows:

[0067] Firstly, make the water and fly ash fully mixed in the mixing tank, and it is in a wet state, and then start the solid-liquid cyclone separator, and the fine particle fly ash coming out of the overflow port of the cyclone separator must be decarbonized Treatment, the coarse-grained fly ash coming out of the bottom outlet of the cyclone separator is dehydrated through the settling tank, the coarse-grained fly ash is transported regularly and uninterrupted, and the collected water returns to the mixing tank to mix with the feed; the overflow is added to the Collecting agent, after pulp pretreatment, it is stirred evenly in the mixing tank and poure...

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Abstract

The invention relates to a high-carbon pulverized coal ash / coal slag decarbonization and classification method and device and provides a high-carbon pulverized coal ash / coal slag decarbonization and classification method. The method comprises the following steps of 1 mixing coal ash / coal slag with water, utilizing solid-liquid rotational flows to remove large particles in coal slag and obtain coal ash / coal slag subjected to pre-deslagging treatment; 2 adding a collector agent into the coal ash / coal slag subjected to pre-deslagging treatment, performing ore pulp pretreatment, performing even stirring, feeding the mixture into a flotation column for flotation, recovering floating carbon powder, and discharging out the coal ash / coal slag; 3 performing classified whirling on the coal ash / coal slag deposited in the flotation column, collecting first-grade pulverized coal ash, discharging out second-grade pulverized coal ash and third-grade pulverized coal ash; 4 performing dehydration treatment on the large particles obtained in the step 1, the carbon powder obtained in the step 2 and the pulverized coal ash obtained in the step 3 and recovering water for recycle. The invention further provides a high-carbon pulverized coal ash / coal slag decarbonization and classification device.

Description

technical field [0001] The invention belongs to the field of value-added utilization of high-carbon fly ash / coal slag recovery, relates to a high-efficiency utilization technology of solid waste resources, and more particularly relates to a compact coal slag decarbonization and separation method. Specifically, the present invention aims at the fly ash / coal cinder with high carbon content, after being fluidized by mixing an appropriate amount of water, adopting swirl deslagging, flotation decarburization and swirl classification methods to reduce the utilization value and utilization ratio Classification and grading of low pulverized coal to achieve a method of greatly increasing its utilization value. The invention also relates to a device for decarbonization and separation of fly ash / coal slag. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion, and is the main solid waste discharged from coal-fired power plants; while h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00
Inventor 刘毅张胜兵徐银香汪华林
Owner EAST CHINA UNIV OF SCI & TECH
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