摘要:
A gasification furnace 2 is divided into a plurality of gasification furnace units 2a and 2b each of which has an inlet 15a, 15b on a lower portion at a longitudinally upstream end in a direction of travel of raw and bed materials and has an outlet 16a, 16b on an upper portion at a longitudinally downstream end in the direction of travel. The outlet 16a is connected to the inlet 15b. The inlet 15a is fed with a raw material and a hot bed material from a materials separator 8. The inlet 15b is also fed with the hot bed material from the material separator 8. The outlet 16b is connected to a combustion furnace 5.
摘要:
A gasification furnace 2 is divided into a plurality of gasification furnace units 2a and 2b each of which has an inlet 15a, 15b on a lower portion at a longitudinally upstream end in a direction of travel of raw and bed materials and has an outlet 16a, 16b on an upper portion at a longitudinally downstream end in the direction of travel. The outlet 16a is connected to the inlet 15b. The inlet 15a is fed with a raw material and a hot bed material from a materials separator 8. The inlet 15b is also fed with the hot bed material from the material separator 8. The outlet 16b is connected to a combustion furnace 5.
摘要:
A lateral duct 15 for interconnecting a riser 1 and a cyclone separator 2 has an introduction portion 16 at the connection with the riser 1 which has a cross-sectional area equal to that of the riser 1, and a throttled portion 17 between the introduction portion 16 and the cyclone separator 2 which has cross-sectional areas gradually reduced from the introduction portion 16 to the cyclone separator 2 so as to increase a flow velocity of combustion gas.
摘要:
A gasification furnace (110) of a circulation fluidized bed-type gasification furnace (100) forms a fluid medium into a fluid bed, and produces gasified gas by gasifying an input gasification raw material using heat from the fluid medium. A combustion furnace (102) heats the fluid medium output from the gasification furnace.A flow rate adjuster (106) distributes the fluid medium heated in the combustion furnace to the gasification furnace and a buffer section (112). In this manner, irrespective of the flow rate of the fluid medium in the entire circulation fluidized bed-type gasification furnace (100), the buffer section (112) enables the fluid medium to bypass to the combustion furnace. As a result, the flow rate of the fluid medium in the gasification furnace (110) can be maintained at a desired flow rate.
摘要:
Provided is a fluidized bed gasification method wherein an amount of solid particles to be circulated in a fluidized bed combustion furnace is controlled to enhance gasification efficiency in the furnace.It is the fluidized bed gasification method with fluidized bed combustion and gasification furnaces 30 and 43, char and solid particles produced upon gasification of raw material 51 in the gasification furnace 43 being circulated to the combustion furnace 30. A circulated amount of the solid particles in the combustion furnace is controlled by varying the same in a range of 6 to 30 with respect to an air flow rate, thereby facilitating heat transmission to the raw material 51.
摘要:
An object of the invention is to enhance gasification efficiency of flammable solid content when high fuel ratio fuel having fixed carbon content in large quantity is to be gasified. A material downcomer 11 for introduction of bed material 10 separated in a material separator 9 and a fuel supply port 21 for introduction of gasification fuel 12 are arranged at one side of a gasification furnace 2; a solid content supply port 19 for supply of flammable solid content 18 and the bed material 10 in the gasification furnace 2 to the combustion furnace 1 is arranged at the other side of the gasification furnace 2. In the gasification furnace 2 and between the one and the other sides of the furnace 2, vertical partition plates 22 are arranged to provide a zigzag curved flow passage 23 with upper and lower turns.
摘要:
Provided is a fuel gasification equipment capable of sufficiently contacting particulates of a solid fuel with a bed material without scattering and reliably completing pyrolysis of the solid fuel to achieve improvement in cold gas efficiency and in C and H conversion rates and reforming of tar in a gasification gas. A fuel supply pipe 14 is connected to a side surface of a gasification furnace 2 at a position lower than an upper surface of a fluidized bed 1 for supplying the solid fuel into the fluidized bed 1. Confluence promoting means 15 is provided to allow the solid fuel supplied from the fuel supply pipe 14 into the fluidized bed 1 to join a flow of the bed material supplied from the downcomer 7 to an inner bottom of the fluidized bed 1.
摘要:
A method and device for controlling retention time of a fluid medium in a fluidized-bed gasification furnace in a gasification facility are provided. A fluid medium is guided to any of a plurality of fluid-medium charge ports connected to a gasification furnace at intervals from an upstream end thereof toward a downstream side in a distribution direction of a fluid medium longitudinally of the gasification furnace. A raw material is guided to any of a plurality of raw-material charge ports connected to the gasification furnace at positions longitudinally of the gasification furnace and correspondingly to the fluid-medium charge ports. The fluid medium is extracted and guided to a combustion furnace from a fluid-medium extraction port connected to a downstream end of the gasification furnace longitudinally thereof in the distribution direction of the fluid medium. Thus, retention time of the fluid medium in the gasification furnace is controlled.
摘要:
In order to improve sealing properties between a downcomer and a high-speed layer and in order to efficiently take out produced gas obtained through gasification of, for example, a solid reactant, a syphon for sealing between a downcomer and a high-speed layer through temporary storage of particles moving from the downcomer to the high-speed layer comprises a reactor portion for causing the solid reactant to conduct chemical reaction through action of the particles, a downcomer seal portion in communication, at upper and lower ends thereof, with the downcomer and a lower portion the reactor portion, respectively, a particle outlet seal portion provided in a spaced apart relationship from the downcomer seal portion and in communication, at upper and lower ends thereof, with the high-speed layer and the lower portion of the reactor portion, respectively, and a freeboard portion formed above the reactor portion.
摘要:
Provided are a fluidized-bed combustion furnace 1, a separator 8 for separation into bed material 11 and an exhaust gas, a fluidized-bed gasification furnace 40 into which the bed material 11 is introduced through a downcomer 46 and into which raw material is introduced, a circulation passage for circulating char and the bed material 11 to the combustion furnace 1, a dispersion section 43 extending along a width of a bed-material-introduction-side wall 41 of the gasification furnace 40 to receive the bed material 11 from the downcomer, fluidizing-gas introduction means 47 for blowing fluidizing gas into the dispersion section 43 to fluidize the bed material 11 in the section 43, and a supply section 48 for supplying the bed material 11 in the dispersion section 43 to the fluidized-bed gasification furnace 40 substantially evenly throughout the width on the bed-material-introduction side.