Unlock instant, AI-driven research and patent intelligence for your innovation.

Coal gasification system and method of circulating fluidized bed

A circulating fluidized bed and coal gasification technology, which is applied in the gasification process, granular/powdered fuel gasification, and the manufacture of combustible gas, can solve the problems of low heat energy utilization rate and uncontrollable cycle rate, and improve the conversion rate , Reduce the amount of fly ash discharged, and the effect of reducing the heat consumption of reaction

Pending Publication Date: 2018-11-06
KEDA MAS CLEAN ENERGY
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low thermal energy utilization rate and uncontrollable circulation rate in the fly ash recovery process in the existing circulating fluidized bed system, the present invention provides a circulating fluidized bed coal gasification system and method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coal gasification system and method of circulating fluidized bed
  • Coal gasification system and method of circulating fluidized bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like figure 1 As shown, a circulating fluidized bed coal gasification system includes a gasification furnace 2, a cyclone separator 3 and a heat exchange system. The gas outlet of the gasification furnace 2 is connected to the cyclone separator 3, and the solid coal particle outlet of the cyclone separator 3 is 18 is connected to the return port 15 of the gasifier 2, and the crude gas outlet of the cyclone separator 3 is connected to a fly ash forced recycling module through a heat exchange system. The fly ash forced recycling module includes a fly ash quantitative conveying device, and the fly ash quantitative The conveying device is connected with the gasification furnace 2, so that the fly ash is returned to the gasification furnace 2 quantitatively.

[0037] The coal gasification system of the present invention is equipped with a fly ash forced recycling module, which returns the fly ash to the gasification furnace 2, so that the carbon-containing fly ash contacts t...

Embodiment 2

[0043] A circulating fluidized bed coal gasification system of this embodiment has basically the same structure as that of Embodiment 1. Further, the heat exchange system of this embodiment includes a preheater 4 and a waste heat recovery device 5, a cyclone separator 3, The preheater 4 is connected to the waste heat recovery device 5 in sequence, and the output end of the waste heat recovery device 5 , that is, the gas outlet 24 of the waste heat recovery device is connected to the fly ash forced recycling module.

[0044] The heat exchanging system of this embodiment makes full use of the heat of the crude gas. In the preheater 4, it fully exchanges heat with the gasification agent, saving the energy required for the gasification agent to enter the gasifier 2 and continue heating.

[0045] The heat exchange system also includes a steam drum 6, the first input end of the steam drum 6, i.e. the soft water inlet of the steam drum 6 is connected with water supply equipment, the f...

Embodiment 3

[0049] A circulating fluidized bed coal gasification system in this embodiment includes a gasifier 2, a cyclone separator 3, and a heat exchange system. The heat exchange system includes a preheater 4, a waste heat recovery device 5, and a steam drum 6. The heat exchange system The fly ash forced recycling module is connected, and the fly ash forced recycling module includes a fly ash quantitative conveying device, a bag filter 7 and an intermediate ash hopper 9, and the input and output ends of the bag filter 7 are respectively output from the waste heat recovery device 5 The end is connected with the middle ash hopper 9, and the crude gas with fly ash coming out from the output end of the waste heat recovery device 5 enters the bag filter 7, which can capture fine fly ash, and the collected fly ash enters the middle ash hopper 9. The fly ash quantitative conveying device includes a circulating fly ash quantitative setting device 12 and a pneumatic conveying device 13, and the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a coal gasification system and method of a circulating fluidized bed, and belongs to the technical field of coal clean and efficient utilization. The system comprises a gasifier, a cyclone separator and a heat exchanging system, and a raw gas outlet of the cyclone separator is connected with a fly ash forcing recycling utilization module through a heat exchanging system. According to the system, a fly ash forcing recycling utilization module is added to reduce the discharging amount of fly ash and greatly improve the conversion rate of carbon; the fly ash forcing utilization module comprises a circulating fly ash quantitative given device which can perform controlling adjusting on fly ash circulating amount and the fly ash amount outside an output system and achievethe controllability of the circulating ratio of a gasifying system. The invention discloses the coal gasification method, the gasification system is adopted, thermal energy in the fly ash recovery process is fully utilized, secondary gasification of the fly ash is achieved, the controllability of the circulating ratio of the gasifying system is further achieved, and the carbon conversion rate ofthe coals is improved.

Description

technical field [0001] The invention belongs to the technical field of clean and efficient utilization of coal, and in particular relates to a circulating fluidized bed coal gasification system and method. Background technique [0002] Coal gasification technology is one of the core technologies for efficient and clean utilization of coal. Specifically, it refers to the process of reacting coal and gasification agent in a gasifier to produce crude gas, and then dedusting and desulfurizing the crude gas to obtain clean gas. The gas flow drawn from the top of the gasifier mainly includes gas mixture products and solid particles containing coal and ash. After passing through the cyclone separator, more than 90% of the particles are collected and returned to the furnace through the return pipe, and are discharged in the fluidized bed. The internal circulation of materials is formed in the gasifier. In the coal gasification system, the ratio of the amount of circulating material...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10J3/56C10J3/72C10J3/74C10J3/84
CPCC10J3/56C10J3/72C10J3/74C10J3/84C10J2300/093C10J2300/1807
Inventor 林慧薪肖深艳毕大鹏邵如意
Owner KEDA MAS CLEAN ENERGY