Method for strengthening bubbling internal circulation of fluidized bed gasification furnace and fluidized bed gasification furnace

A fluidized bed gasifier and internal circulation technology, which is applied in the field of coal gasification, can solve the problems of slow coal circulation speed, coal powder slagging, and reduced gas production efficiency, so as to improve gasification efficiency, promote agitation, and improve The effect of movement speed

Pending Publication Date: 2019-04-16
JIANGSU PUGE MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the circulation of pulverized coal is completely driven by the airflow from the central jet tube, the circulation speed of pulverized coal is very slow, which will easily lead to slagging of the pulverized coal in the high temperature area above the central jet tube, reducing the gas production efficiency

Method used

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  • Method for strengthening bubbling internal circulation of fluidized bed gasification furnace and fluidized bed gasification furnace
  • Method for strengthening bubbling internal circulation of fluidized bed gasification furnace and fluidized bed gasification furnace

Examples

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Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the method of strengthening the bubbling internal circulation of the fluidized bed gasifier is to install a plurality of inlet pipes 5 along the direction of the pulverized coal circulation in the dense-phase area of ​​the gasifier 1 to form a gas path. The air intake pipe 5 blows air into the furnace body, and the airflow is used to drive the pulverized coal to accelerate circulation.

[0021] The working principle of this embodiment is: the airflow drives the pulverized coal to accelerate circulation, promotes the rapid circulation of the crushed coal in the bubbling area through the central high-temperature zone, and at the same time shortens the residence time of the pulverized coal in the central high-temperature zone, reduces the phenomenon of pulverized coal slagging, and reduces the size of the coal. The temperature difference between different positions of powder in the gasifier can be improved to improve the gas production efficiency...

Embodiment 2

[0023] Such as figure 1 As shown, the fluidized bed gasification furnace includes a vertical cylindrical furnace body 1, a slag outlet 2 is opened at the bottom of the furnace body 1; a central jet tube 3 is arranged inside the slagging outlet 2, and a There is an exhaust port 4; several air intake pipes 5 are connected to the lower side wall of the furnace body, and the air intake pipes are evenly distributed along the circumference of the cylinder body 1, and the end of the air intake pipe 5 located outside the furnace body 1 is inclined upward, so that the air intake direction is inclined downward The side wall of body of furnace 1 is provided with several feed pipes 6, and feed pipe 6 conveys pulverized coal into the bubbling dense-phase area in body of furnace 1 to carry out gasification reaction, and described air inlet pipe 5 is connected in the furnace obliquely downward. On the side wall of the furnace body 1; the furnace body 1 is lined with a high-temperature resist...

Embodiment 3

[0027] Such as figure 2 As shown, the fluidized bed gasification furnace includes a vertically arranged cylindrical furnace body. The bottom of the furnace body 1 is provided with a slag discharge port 2. A central jet tube 3 is arranged inside the slag discharge port 2. A discharge port 3 is provided at the top of the furnace body 1. Gas port 4, several intake pipes 5 are connected to the lower side wall of the furnace body 1, the intake pipes are evenly distributed along the circumference of the cylinder body 1, and several feed pipes 6 are arranged on the side wall of the furnace body 1, and the feed pipes 6 will be broken The coal is transported into the bubbling dense-phase area in the furnace body 1 for gasification reaction. The furnace body 1 is provided with an inner cylinder 7, and the upper end of the inner cylinder 7 is turned outward to form an annular flanging 8. The outer edge of the annular flanging 8 The edge is fixedly connected to the inner wall of the furn...

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Abstract

The invention relates to a method for strengthening bubbling internal circulation of a fluidized bed gasification furnace and a fluidized bed gasification furnace, wherein the method comprises the following steps of: arranging a gas path along the running direction of coal powder on the periphery of a coal powder cavity of the gasification furnace, supplying gas to the gas path, and utilizing airflow to drive the coal powder to accelerate circulation; the fluidized bed gasification furnace comprises a vertically arranged cylindrical furnace body, the bottom of the furnace body is provided witha slag discharge port; a central jet pipe is arranged in the slag discharge port; the top of the furnace body is provided with an exhaust port; the side wall of the lower part of the furnace body isconnected with a plurality of air inlet pipes; the side wall of the furnace body is provided with a plurality of feeding pipes; the feeding pipes convey the pulverized coal into the furnace body for gasification reaction, an air inlet pipe is obliquely and downwards connected on the side wall of the furnace body, and a free end of the air inlet pipe is oblique and upward, so that the air inlet direction is oblique and downward. The method utilizes the airflow to drive the pulverized coal to accelerate circulation, shortens the retention time of the pulverized coal in a central high-temperatureregion, reduces the slagging phenomenon of the pulverized coal, reduces the temperature difference of the pulverized coal in different positions in the gasification furnace, and improves the gas production efficiency.

Description

Technical field: [0001] The invention belongs to the technical field of coal gasification, and in particular relates to a method for strengthening the bubbling internal circulation of a fluidized bed gasification furnace and a fluidized bed gasification furnace. Background technique: [0002] The fluidized bed gasifier is widely used in the field of coal gasification due to its low investment, wide adaptability to coal quality, and no pollution by dry ash removal. A fluidized bed gasifier mainly includes a furnace body, an air inlet pipe, a central jet pipe, a feed pipe, an exhaust pipe, and a cyclone return pipe, etc. The traditional gasifier usually has a conical gas distribution plate at the bottom of the furnace , and arrange a large number of air holes on the gas distribution plate, and then blow air into the air chamber below the gas distribution plate, so that the gas is ejected from the horizontal direction of the air holes to purge the coal powder and coal blocks ab...

Claims

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Application Information

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IPC IPC(8): C10J3/56C10J3/50
CPCC10J3/50C10J3/56C10J2300/093
Inventor 黄佳欣
Owner JIANGSU PUGE MACHINERY
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