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

Coupling system and working method of fluidized bed coal gasification and biomass low temperature carbonization

A working method and low-temperature carbonization technology, which is applied in the gasification of granular/powdered fuels, the petroleum industry, and the manufacture of combustible gases, etc. Ashes are not being recycled etc.

Active Publication Date: 2021-04-20
DALIAN UNIV OF TECH
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the high-carbon fly ash entrained by crude gas has not been recycled; at the same time, the carbonization furnace used for roasting biomass is an independent heat supply, and the treatment of pyrolysis waste liquid has not been considered. In terms of energy utilization and environmental protection Both are flawed

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
  • Coupling system and working method of fluidized bed coal gasification and biomass low temperature carbonization
  • Coupling system and working method of fluidized bed coal gasification and biomass low temperature carbonization
  • Coupling system and working method of fluidized bed coal gasification and biomass low temperature carbonization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]The pulverized coal with a particle size of less than 8mm enters the circulating fluidized bed gasification furnace 1 together with the gasification agent for gasification reaction. After the crude gas is processed by the first-stage cyclone separator 2, the entrained carbon particles Separation, the separated carbon particles are directly returned to the furnace from the lower input port of the circulating fluidized bed gasification furnace 1 to continue to participate in the gasification reaction. The crude gas treated by the primary cyclone separator 2 continues to enter the air preheater 3 to preheat the air or oxygen-enriched air required in the gasification process. The crude gas that has been heat-exchanged by the air preheater 3 is divided into two parts through the three-way pipe, and a part of the crude gas enters the carbonization furnace as a heat carrier gas to provide heat for the normal operation of the carbonization furnace 4 for processing biomass; after ...

Embodiment 2

[0035] Example 2 Reactivity Test of High Carbon Fly Ash and Acidic Organic Waste Liquid

[0036] The high-carbon fly ash and acidic organic waste liquid were mixed, stirred and dried according to the ratio (mass ratio) shown in the figure, and the conversion rate and gasification reaction rate were measured. In addition, the reaction is carried out in a thermogravimetric analyzer, the measurement temperature is 900 ° C, and the gasification agent is pure CO 2 . In addition, the fixed carbon content of the high-carbon fly ash used is 66.4%, the volatile matter content is 10.4%, and the ash content is 23.2%. 2.1.

[0037] figure 2 and image 3 The measurement results of gasification conversion rate and reaction rate are shown respectively. From this result, it can be seen that the gasification reactivity of high-carbon fly ash is significantly improved by mixing acidic organic waste liquid, and the gasification reaction rate increases by more than 2 times. Then, the rela...

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 diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a fluidized bed coal gasification and biomass low-temperature carbonization coupling system and working method, belonging to the technical field of coal and biomass co-gasification. The system includes circulating fluidized bed gasifier, carbonization furnace, two-stage cyclone separator, two-stage cooler, air preheater, waste water evaporator, gas cooler, bag filter, agitator, cold press molding machine and corresponding delivery device. The invention uses the heat carried by the fluidized bed coal gasification synthesis gas to provide energy for the biomass carbonization furnace to obtain the biomass charcoal required for co-gasification, and utilizes the acidic organic waste liquid generated in the low-temperature carbonization process of the biomass to enhance fluidization The gasification reactivity of high-carbon fly ash in bed gasification furnace can realize the high-efficiency circulation gasification of high-carbon fly ash. The invention improves the shortcoming of the low carbon conversion rate of the fluidized bed gasification furnace due to the high carbon content in the fly ash and the shortcoming that the biomass carbonization furnace needs additional heating equipment, and has the advantages of cascaded utilization of heat and high carbon conversion efficiency. Advantages of high and pollution-free emissions.

Description

technical field [0001] The invention belongs to the technical field of co-gasification of coal and biomass. More specifically, the present invention relates to a coupling system of fluidized bed coal gasification and biomass low-temperature carbonization. Background technique [0002] In the field of fluidized bed coal gasification, the operating temperature of the gasifier is generally controlled at 900-1100°C. The lower operating temperature leads to high carbon content in the furnace material, so that part of the powdered carbon is carried out of the gasifier by the crude gas, and the carbon powder with larger particles is separated by the first-stage cyclone separator and directly returns to the furnace for circular gasification. The carbon powder with finer particles is separated by the secondary cyclone separator and the subsequent bag filter and mixed with coal ash to become high-carbon fly ash. The volatile content of fine powdered carbon in high-carbon fly ash is ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/56C10J3/84
CPCC10J3/56C10J3/84Y02P20/129
Inventor 张岩李崇聪郑金昊
Owner DALIAN UNIV OF TECH