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Fluidized bed

A fluidized bed and furnace wall technology, applied in fluidized bed. It can solve the problems of reducing the service life of the equipment, the molten material is easy to stick to the furnace wall, and burning out.

Active Publication Date: 2018-12-11
雷波明信实业发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned patents disclose the use of carrier gas guides inclined to the inner wall for introducing gas into the reaction furnace, but the carrier gas guides of the above-mentioned patents are set into the furnace
Under the high temperature conditions (1350-1400°C) used in the process of producing phosphorus pentoxide, the burner protruding into the furnace can easily burn out the opposite burner, thus reducing the service life of the equipment
Moreover, the burner protruding into the furnace will make the reaction area of ​​the gasification material smaller, and the molten material will easily stick to the furnace wall, which increases the cleaning times of the equipment and is not conducive to energy saving.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The present invention is used for the combustion device of fluidized bed and is provided with the fluidized bed of this combustion device as follows:

[0050] The combustion device used in the fluidized bed in this embodiment includes two burners. Wherein the central axes of the first burner and the second burner are parallel to each other but do not directly intersect to form a straight line, and are located on the same plane. The high-temperature gas ejected from the gas injection ports of the first burner and the second burner has a vector at least along the tangential direction of the conical furnace wall. The high-temperature gas generated in the combustion chambers of the first burner and the second burner enters the reaction chamber simultaneously and continuously. The two high-temperature gas streams from the first burner and the second burner are ejected in opposite directions along the conical furnace wall. After colliding with each other, they form a high-sp...

Embodiment 2

[0052] The present embodiment is used for the combustion device of fluidized bed and the fluidized bed that is equipped with this combustion device is configured as follows:

[0053] The combustion device used in the fluidized bed in this embodiment includes three burners installed on the conical furnace wall. Wherein the central axes of the first burner, the second burner and the third burner are on the same plane and arranged at an angle of 120° to each other. The high-temperature gas ejected from the gas injection ports of the first burner, the second burner and the third burner has a vector at least along the tangential direction of the conical furnace wall. The high-temperature gas generated in the combustion chamber of the three burners enters the reaction chamber simultaneously and continuously. Three high-temperature gas streams from three combustion devices are ejected along the conical furnace wall, and form a high-speed vortex gas flow through mutual collision, imp...

Embodiment 3

[0055] The fluidized bed equipped with the combustion device of the present invention is arranged as follows in the present embodiment:

[0056] In this embodiment, three burners are installed in the fluidized bed reaction furnace 104 , wherein the central axis of the first burner, the second burner and the third burner are arranged at an acute angle with the central axis of the reaction furnace 104 . Preferably, the high-temperature gas flow ejected from the gas injection ports of the first burner, the second burner and the third burner faces obliquely upward of the conical furnace wall. The high-temperature gas ejected from the gas injection ports of the first burner, the second burner and the third burner has a vector at least along the obliquely upward tangential direction of the conical furnace wall. The high-temperature gas generated in the combustion chamber of the three burners enters the reaction chamber simultaneously and continuously. The three high-temperature air...

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Abstract

The invention relates to a fluidized bed. The fluidized bed is provided with a combustion device with at least two burners, wherein the combustion device comprises a conical furnace wall, and high temperature gas ejected through the at least two burners during combustion approximately tangentially meets the conical furnace wall, and is reversed by the conical furnace wall to form a circumferentialdivided flow and an axially upward divided flow, thereby forming an upward high velocity cyclonic gas flow that holds a material up to form the fluidized bed. The gas flow in the fluidized bed disclosed by the invention is a vortex gas flow with the middle flow velocity less than the surrounding flow velocity, which facilitates the discharge of a flow of the material. At the same time, the vortexflow further lifts up the material by the conical furnace wall structure at the bottom of a reacting furnace of the fluidized bed.

Description

[0001] The present invention is a divisional application with the application number 201610242301.4, the application date is April 15, 2016, the application type is invention, and the application name is a combustion device for a fluidized bed and a fluidized bed equipped with the combustion device . technical field [0002] The invention relates to the technical field of fluidized bed combustion, in particular to a fluidized bed. Background technique [0003] Phosphoric acid plays an important role in the national economy and is an intermediate raw material for the production of phosphate fertilizer and phosphate. Phosphoric acid and its downstream products are widely used in chemical industry, agriculture, medicine, food, electronics and other fields. [0004] At present, the production methods of phosphoric acid industry at home and abroad are divided into two process routes: wet method and thermal method. Wet-process phosphoric acid is produced by decomposing phosphate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/24
CPCB01J8/1836B01J8/24B01J2208/00504
Inventor 王涛卢成章刘鸿生陈文俊李联
Owner 雷波明信实业发展有限公司