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Coal gasification fine slag flotation separation dewatering system and method

A separation dehydration and coal gasification technology, applied in the field of coal gasification, can solve the problems of interface chemical properties and separation behavior, provide guidance and reference for charcoal and ash separation, achieve good industrial application prospects, save equipment installation space, and process capacity big effect

Active Publication Date: 2019-07-26
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, the above studies only analyzed and characterized the basic physical and chemical properties and surface morphology of unburned carbon in ash, and did not correlate these properties with the interfacial chemical properties and separation behavior of carbon particles. Separation provides guidance and reference

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  • Coal gasification fine slag flotation separation dewatering system and method
  • Coal gasification fine slag flotation separation dewatering system and method
  • Coal gasification fine slag flotation separation dewatering system and method

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Embodiment

[0050] Using the coal gasification fine slag flotation separation dehydration system of the present invention, the coal gasification fine slag (black water) flotation separation dehydration process is as follows:

[0051] In step a, the gasified fine slag generated from coal gasification is converted into gasified black water containing fine slag by spraying, and transported to the gasified black water buffer tank 1 through pipelines;

[0052] Step b, the gasified black water in the gasified black water buffer tank 1 is sent to the feed port 17 of the vacuum filtration device platform 5 through the gasified black water feed pump 2, for the flotation of layered carbon and ash in the liquid The agent is sent from the flotation agent buffer tank 3 to the feed port 17 of the vacuum filter platform 5 through the action of the flotation agent feed pump 4, and merges with the gasified black water at the inlet, and is fully absorbed by the stirring action of the agitator 6. mix;

[0...

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Abstract

The invention discloses a coal gasification fine slag flotation separation dewatering system and method. The system comprises a gasification black water buffer tank, a flotation reagent buffer tank, avacuum filtration device platform and a flotation-dewatering device. An outlet of the gasification black water buffer tank and an outlet of the flotation reagent buffer tank are connected with a feedport of the vacuum filtration device platform through pipelines; the flotation-dewatering device is mounted in the vacuum filtration device platform and comprises a cylindrical shell, the feed port of the vacuum filtration device platform is led into the shell, and a plurality of vacuum filtration plates are arranged in the shell along the circular section direction of a cylinder; a carbon residue filter cake scraper and an ash filter cake scraper are mounted in the shell and close to the vacuum filtration plates. Carbon residues, ash and water in gasification black water can be separated, the water can be recycled, the carbon residues and the ash can be used for producing materials with high added-values, and coal gasification fine slag can be recycled.

Description

technical field [0001] The invention belongs to the technical field of coal gasification, and in particular relates to an integrated system and method for flotation, separation and dehydration of coal gasification fine slag. Background technique [0002] Coal has an important strategic position in China's national economic and social development. Coal gasification technology is one of the core technologies for clean coal conversion and the basis for the development of process industries such as coal-based chemicals, coal-based liquid fuels, and IGCC power generation. At present, coal-water slurry and pulverized coal gasification technology is mostly used in large-scale gasification. During the gasification process, about 60% of ash and unreacted carbon are carried out by the gas. In order to remove the dust in the gas, washing methods are often used. After flocculation and vacuum filtration, the fine slag still contains about 55% of water, and contains a large amount of heav...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/14B04B11/08B04B15/10
CPCB03D1/14B04B11/08B04B15/10
Inventor 张一昕郭凡辉武建军
Owner CHINA UNIV OF MINING & TECH
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