Dual-medium turbulent fluidized bed gasification incinerator and implementation method of waste gasification incineration

Patent metadata

Field	Value
Publication number	US-2025035308-A1
Application number	US-202418916752-A
Country	US
Kind code	A1
Filing date	Oct 16, 2024
Priority date	Jun 15, 2022
Publication date	Jan 30, 2025
Grant date	—

Abstract

A dual-medium TFB gasification incinerator and implementation method of a waste gasification incineration. The incinerator includes an incinerator body, a gas-solid separator, a waste heat recovery device, and an incinerator body support. The incinerator body includes a gasification section, a combustion section, and a heat exchange section that are all sequentially connected from bottom to top. The combustion section and the heat exchange section are indirectly connected. The incinerator body support includes at least one layer of transverse beam, which is located at a level higher than a connection part of the combustion section and faces the incinerator body. Each of the at least one layer of transverse beam is provided with a layer of support plate on a side close to the incinerator body. Each layer of support plate supports a first-stage of heat exchange furnace wall and heat conduction oil coil pipes provided on an inner surface of the first-stage.

First claim

What is claimed is:

1 . A dual-medium turbulent fluidized bed (TFB) gasification incinerator, comprising: an incinerator body, a gas-solid separator, a waste heat recovery device, and an incinerator body support, the incinerator body, the gas-solid separator, and the waste heat recovery device being all sequentially interconnected,
wherein the incinerator body comprises a gasification section, a combustion section, and a heat exchange section that are all sequentially connected from bottom to top, the bottom of the gasification section being provided with a first air distribution device and having a slag discharge outlet, the gasification section comprising an upper variable cross-section segment, an equal cross-section segment, and a lower variable cross-section segment arranged from upper, middle to lower level, the upper variable cross-section segment having a cross-sectional area gradually increasing from top to bottom, and the lower variable cross-section segment having a cross-sectional area gradually decreasing from top to bottom, wherein the cross-sectional area of the upper variable cross-section segment is not less a cross-sectional area of the combustion section, the combustion section being provided with secondary air distribution devices on sides of the combustion section; wherein a furnace wall of the gasification section and a furnace wall of the combustion section are both water walls, a furnace wall of the heat exchange section connecting indirectly with the furnace wall of the combustion section, an outer surface of the furnace wall of the combustion section being provided with a connection part, the heat exchange section comprising at least one stage of heat exchange furnace wall, two adjacent stages of heat exchange furnace walls being arranged vertically and connecting with each other indirectly, an inner surface of each stage of the heat exchange furnace wall being provided with a set of heat conduction oil coil pipes, a flow direction of a heat conduction oil in each set of heat conduction oil coil pipes being bottom-in and top-out, the heat exchange section having a hot flue gas outlet at the top of the heat exchange section, and the hot flue gas outlet being connects with the waste heat recovery device via the gas-solid separator; wherein the waste heat recovery device comprises a heat conduction oil pipe row, an economizer, and an air preheater that are all arranged sequentially from top to bottom, a hot air outlet of the air preheater being connected to at least one of an air inlet of a gasification section and an air inlet of a combustion section; and wherein the incinerator body support comprises a steel frame body and at least one layer of support plate, the steel frame body and the at least one layer of support plate being interconnected with each other, the at least one layer of the support plate being higher than the connection part and facing the incinerator body, each of the at least one layer of the support plate supporting one stage of the heat exchange furnace wall and the heat conduction oil coil pipes arranged at the inner surface of the heat exchange furnace wall of the one stage, a flexible connection seal being provided between the two adjacent stages of heat exchange furnace walls and between the heat exchange furnace wall and the furnace wall of the combustion section, and an incinerator body portion of the gasification section and an incinerator body portion of the combustion section being connected to the steel frame body via the connection part by suspension arrangement.

2 . The dual-medium TFB gasification incinerator according to claim 1 , wherein the incinerator body portion of the gasification section and the incinerator body portion of the combustion section are suspended from a layer of support plate between the heat exchange furnace wall and the combustion section furnace wall via the connection part; or
the incinerator body support further comprises a first transverse beam provided at a part of the steel frame body above the connection part and facing towards the incinerator body, the incinerator body portion of the gasification section and the incinerator body portion of the combustion section being suspended from the first transverse beam via the connection part.

3 . The dual-medium TFB gasification incinerator according to claim 2 , wherein the layer of the support plate between the heat exchange furnace wall and the combustion section furnace wall is disposed on a side of the first transverse beam close to the incinerator body; and/or
the incinerator body support further comprises at least one layer of a second transverse beam provided at a part of the steel frame body above the first transverse beam and facing towards the incinerator body, a number of layers of the second transverse beams being equal to a number of layers of the support plates disposed between the heat exchange furnace walls, and each of the layers of the support plates located between the two adjacent stages of heat exchange furnace walls being disposed at one of the at least one layer of the second transverse beam on a side close to the incinerator body.

4 . The dual-medium TFB gasification incinerator according to claim 2 , wherein a steam drum is connected to an upper portion of the water walls, the steam drum having an inlet connected to an upper header of the water walls and an outlet connected to a lower header of the water walls.

5 . The dual-medium TFB gasification incinerator according to claim 4 , wherein a steam drum support is provided at the layer of the support plate between the heat exchange furnace wall and the combustion section furnace wall or the first transverse beam is provided with a steam drum support, the steam drum being disposed at the steam drum support.

6 . The dual-medium TFB gasification incinerator according to claim 1 , wherein a length of the combustion section is ¼ to ⅓ of a total height of the incinerator body, a length of the gasification section being ⅙ to ⅓ of the total height of the incinerator body.

7 . The dual-medium TFB gasification incinerator according to claim 1 , wherein a connection height between the two adjacent stages of heat exchange furnace walls is in a range of 300 mm to 500 mm, a connection height between the heat exchange furnace wall and the furnace wall of the combustion section is in a range of 300 mm to 500 mm.

8 . The dual-medium TFB gasification incinerator according to claim 1 , wherein an inner surface of the furnace wall of the gasification section is provided with a refractory layer.

9 . The dual-medium TFB gasification incinerator according to claim 1 , wherein each of the secondary air distribution devices has an upper layer of air inlet, a middle layer of air inlet, and a lower layer of air inlet that are arranged in a height direction of the incinerator body.

10 . The dual-medium TFB gasification incinerator according to claim 1 , wherein each set of the heat conduction oil coil pipes are arranged helically and upwards in a circumferential direction of the heat exchange furnace wall.

11 . The dual-medium TFB gasification incinerator according to claim 1 , wherein a flexible connection seal is provided between the incinerator body and the hot flue gas outlet.

12 . The dual-medium TFB gasification incinerator according to claim 1 , wherein the air preheater is internally provided with a partition to divide the air preheater into a first air preheater and a second air preheater, which are arranged vertically or horizontally, the first air preheater having a first cold air inlet and a first hot air outlet, the second air preheater having a second cold air inlet and a second ho

Assignees

• Univ Tsinghua
• Beijing Aptblaze Tech Co Ltd

Inventors

• Zhang Yanguo
• Zhou Hui
• Cong Kunlin
• Qi Xiaoyu
• Zhang Ning
• Chen Xuan
• Li Qinghai

Classifications

• F23C10/10

  the separation apparatus being located outside the combustion chamber · CPC title

• F23J1/06

  Mechanically-operated devices, e.g. clinker pushers (forming part of the grate F23H) · CPC title

• F23G5/027 Primary

  pyrolising or gasifying stage (pyrolisation of sludge C02F11/00; destructive distillation of carbonaceous materials C10B53/00) · CPC title

• F23G5/30 Primary

  having a fluidised bed · CPC title

• F23J15/022

  for removing solid particulate material from the gasflow · CPC title