Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Gasification method and system with fly ash regasification

A technology for regasification and gasification of coal gas, which is applied to the gasification of granular/powdered fuels, the manufacture of combustible gases, and the petroleum industry. It can solve problems such as environmental pollution, difficult disposal, and large production of gasification fly ash The effect of rich hole structure and reduced equipment investment

Active Publication Date: 2021-10-01
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gasification fly ash belongs to general solid waste, if not properly disposed of, it will cause environmental pollution
Therefore, fluidized bed coal gasification technology urgently needs to solve the bottleneck problem of large amount of gasification fly ash and difficult disposal.

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
  • Gasification method and system with fly ash regasification
  • Gasification method and system with fly ash regasification
  • Gasification method and system with fly ash regasification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The invention provides a gasification method with fly ash regasification, figure 1 It is a system flow diagram of a gasification method with fly ash regasification provided according to an embodiment of the present invention, such as figure 1 As shown, the method specifically includes:

[0082] (1) Pass the fuel and the main gasification agent into the circulating fluidized bed gasification furnace for gasification reaction to generate primary products; the reaction temperature of the circulating fluidized bed coal gasification furnace is between 850°C and 1200°C, specifically, During the operation of the gasifier, the maximum temperature at the bottom of the furnace is controlled to be 50-150°C lower than the softening temperature of the fuel ash in a weakly reducing atmosphere to avoid over-temperature slagging at the bottom of the furnace. The fuel ash refers to the residue left after the fuel is completely burned and gasified.

[0083] The above-mentioned fuels ar...

Embodiment 2

[0095] figure 2 It is a system flow chart of the gasification method with fly ash regasification provided according to another embodiment of the present invention, such as figure 2 As shown, the method is roughly the same as figure 1 The method shown is the same, except that:

[0096] Pass the fly ash with the first particle size within the first temperature range, the auxiliary gasification agent, and the fly ash with the second particle size within the second temperature range into the fly ash gasifier for gasification reaction, When the activation reaction is carried out in the ash activator, high-temperature gas is introduced, that is, the first particle size fly ash whose temperature is within the first temperature range, the second particle size fly ash whose temperature is within the second temperature range, and high-temperature gas are introduced into the ash activator. A fly ash activator, so that in the fly ash activator, high-temperature gas is used to assist i...

Embodiment 3

[0101] The gasification method with fly ash regasification of the present invention specifically comprises:

[0102] (1) Pass the fuel and the main gasification agent into the circulating fluidized bed gasification furnace for gasification reaction to generate primary products;

[0103] (2) Pass the primary product into the primary gas-solid separation device to generate a mixture of coal gas and fly ash and carbon-containing particles at the first temperature range, and return the carbon-containing particles to the circulating fluidized bed through the feeder gasifier;

[0104] (3) Pass the mixture of coal gas and fly ash whose temperature is within the first temperature range into the secondary gas-solid separation device for separation to obtain the first particle size fly ash with temperature within the first temperature range; also obtain the temperature within the first temperature range a mixture of gas and fly ash of a second particle size within a temperature range; ...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of fuel gasification, in particular to a gasification method and system with fly ash regasification. The gasification method with fly ash regasification comprises the following steps: introducing fuel and a main gasification agent into a circulating fluidized bed gasification furnace for gasification reaction to generate a mixture of coal gas and fly ash with the temperature within a first temperature range; separating the mixture of the coal gas and the fly ash within the first temperature range to obtain fly ash with a first particle size within the first temperature range and a mixture of the coal gas and the fly ash with a second particle size within the first temperature range; introducing a mixture of the coal gas with the temperature within the first temperature range and the fly ash with the second particle size into a main cooling dust removal system to be cooled and separated, and obtaining the coal gas with the temperature within the second temperature range and the fly ash with the second particle size within the second temperature range; and introducing the first particle size fly ash with the temperature within the first temperature range and the second particle size fly ash with the temperature within the second temperature range into a fly ash activator.

Description

technical field [0001] The invention relates to the technical field of fuel gasification, in particular to a gasification method and system for regasification with fly ash. Background technique [0002] Fluidized bed gasification technology includes bubbling fluidized bed gasification technology and circulating fluidized bed gasification technology. The operating temperature of the fluidized bed gasification technology is mild (for example, generally at 850-1100°C), and wide-screened crushed coal is used as raw material (for example, the particle size is generally 0-10mm). Compared with entrained bed gasification technology, fluidized bed gasification technology has the advantages of low coal preparation cost, wide adaptability of raw materials, less pollutant discharge, less equipment investment, low operation and maintenance costs, and significant economic benefits. However, the gas generated by the fluidized bed gasifier will escape the system with a large amount of fine...

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): C10J3/56C10J3/84
CPCC10J3/56C10J3/84
Inventor 张海霞吕清刚朱治平湛月平王小芳王东宇
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com