Coal water slurry gasification fine ash treatment system and process

A treatment system, coal-water slurry technology, applied in the field of coal chemical industry, to achieve the effect of increasing ash output speed, stable equipment operation and good heat transfer performance

Pending Publication Date: 2020-05-08
恒力石化(大连)炼化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention optimizes the drying form of the fine ash and the material of the drying equipment, adjusts the conveying mode, and sends the processed fine ash into a circulating fluidized bed boiler for mixed combustion, thereby solving the problem of gasification fine ash treatment

Method used

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  • Coal water slurry gasification fine ash treatment system and process
  • Coal water slurry gasification fine ash treatment system and process
  • Coal water slurry gasification fine ash treatment system and process

Examples

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Embodiment 1

[0060] use Figure 1-5 In the gasification fine ash treatment system and process shown, the gasification fine ash filter cake with a moisture content of 55% from the upstream vacuum filter is 8000kg / h, and enters the inside of the dryer through the rotary valve at the feed port of the dryer for drying. After drying, the gasified fine ash powder 4235kg / h with a moisture content of 15% enters the downstream screw conveyor through the rotary valve at the outlet of the dryer, and is transported to the fine ash mixing device, where it is mixed with boiler coal and sent to the circulation Fluidized bed boiler for co-firing.

[0061] The disc-type steam dryer is used to dry the gasification fine ash filter cake as the heat medium is steam, and the steam is adjusted to the required pressure through the regulating valve and enters the jacket and the rotating shaft of the dryer to heat the material, using 0.45MPa low-pressure steam When the flow rate of added steam is 4075kg / h, the ste...

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Abstract

The invention provides a coal water slurry gasification fine ash treatment system and process. The system comprises a vacuum filter, a drying device, a tail gas washing device, a conveying device anda fine ash mixing device; the tail gas washing device comprises at least one plate type washing tower, and a tail gas inlet is formed below the last layer of tower tray of each washing tower; a gas outlet is formed in the tower top of each washing tower; a gas outlet of each washing tower is connected with at least one induced draft fan; the drying device comprises N single-shaft disc paddle dryers connected in parallel and at least one steam condensate recovery tank, N is larger than or equal to 2, and N is an integer. With use of the system, a drying form and a drying equipment material areoptimized; the conveying mode is adjusted, the treatment problem of gasified fine ash is solved, the gasified fine ash is conveyed into an existing circulating fluidized bed boiler for mixed burning to replace take-out after being dried, the problems of energy waste, factory environment pollution, environment pollution in the transportation process and the like can be effectively solved, and meanwhile the production cost of enterprises is reduced.

Description

technical field [0001] The invention relates to the technical field of coal chemical industry, in particular to a coal-water slurry gasification fine ash treatment system and process. Background technique [0002] The coal-water slurry gasification process uses pure oxygen and coal-water slurry as raw materials, adopts an entrained bed reactor, and performs partial oxidation reaction under pressurized and non-catalytic conditions to generate CO, H 2 Syngas is an effective component. In the process of producing syngas, high-temperature syngas will entrain a large amount of coal powder and fine ash. After the high-temperature gas is chilled and cooled, washed and purified, the coal powder and fine ash are washed by chilled water to form gasified black water. After the black water undergoes high pressure, low pressure and vacuum flash evaporation, flocculation and sedimentation, and vacuum filtration, it forms gasified fine ash. The gasification fine ash has a moisture conten...

Claims

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Application Information

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IPC IPC(8): C10J3/48C10J3/84
CPCC10J3/485C10J3/84C10J2300/1615C10J2300/1631
Inventor 栗铭许可咏孙波
Owner 恒力石化(大连)炼化有限公司
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