Device and method for regulating temperature of coal gas at outlet of fluidized bed gasifier

A technology of fluidized bed gasification furnace and gas temperature, which is applied to the gasification of granular/powdered fuel, the manufacture of combustible gas, and the petroleum industry. It can solve the problems of increased investment costs and increased difficulty in equipment manufacturing, and the method is simple easy effect

Active Publication Date: 2013-12-25
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially with the continuous increase of the gasification scale of a single set of gasification equipment, the operating pressure of the gasification furnace is gradually increasing, which further improves the control valves required for the follow-up cyclone separator and other equipment of the gasification furnace. Or the requirements of other control components, resulting in increased difficulty in subsequent equipment manufacturing and increased investment costs

Method used

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  • Device and method for regulating temperature of coal gas at outlet of fluidized bed gasifier
  • Device and method for regulating temperature of coal gas at outlet of fluidized bed gasifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the middle of the high-temperature-resistant vertical pipe section 6, three nozzles 2 in the middle of the vertical pipe section are arranged at an angle of 120°, and at the top of the high-temperature-resistant vertical pipe section 6, a vertical pipe section top nozzle 3 is arranged. The included angle between the nozzle 2 in the middle of the straight pipe section and the tangent line to the outer wall of the high temperature resistant vertical pipe section 6 is 60°. The nozzle 3 on the top of the vertical pipe section is vertical to the top of the high temperature resistant vertical pipe section 6 .

[0021] (1) During the cold start-up process of the fluidized bed gasifier, feed nitrogen into the nozzle 2 in the middle of the vertical pipe section and the top nozzle 3 of the vertical pipe section to protect the nozzles from being burned and blocked.

[0022] (2) The normal operating conditions of the fluidized bed gasifier are temperature 1000°C and gas volume 3...

Embodiment 2

[0025] The head 5 on the top of the gasifier is provided with three head nozzles 1 uniformly distributed at an angle of 120°, and no nozzles are provided in other positions. The tangent angle between the head nozzle 1 and the outer wall of the gasifier head 5 is 70°.

[0026] (1) During the cold start-up process of the fluidized bed gasifier, carbon dioxide is injected into the head nozzle 1 to protect the nozzle from burning and clogging.

[0027] (2) The normal operating conditions of the fluidized bed gasifier are temperature 950°C and gas volume 39852Nm 3 / h, the gas composition is shown in Table 1. The gas temperature requirement for the subsequent process is 900°C. After the gasifier reaches normal operating conditions, a total of 1218kg / h of deoxygenated water and 12.2kg / h of atomized steam are fed into the head nozzle 1, and the gas temperature drops from 950°C to 900°C for subsequent processes.

[0028] (3) During the shutdown process of the fluidized bed gasifier,...

Embodiment 3

[0030] The top head 5 of the gasifier is equipped with three head nozzles 1 evenly distributed at an angle of 120°, and two nozzles 2 in the middle of the vertical pipe section are arranged symmetrically in the middle of the high-temperature-resistant vertical pipe section 6, and one nozzle 2 is installed in the high-temperature-resistant horizontal pipe section 7. High temperature resistant horizontal pipe nozzle 4. The angle between the head nozzle 1, the middle nozzle 2 of the vertical pipe section and the nozzle 4 of the horizontal pipe section and the outer wall of the gasifier head, the outer wall of the high-temperature-resistant vertical pipe section 6 and the outer wall of the high-temperature-resistant horizontal pipe section 7 is 45°.

[0031] (1) During the cold start-up process of the fluidized bed gasifier, water vapor is supplied to the head nozzle 1, the middle nozzle 2 of the vertical pipe section and the nozzle 4 of the horizontal pipe section to protect the n...

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Abstract

The invention relates to a device for regulating the temperature of coal gas at the outlet of a fluidized bed gasifier. The device comprises a fluidized bed gasifier top seal head (5), a high temperature resistant vertical pipe section (6) and a high temperature resistant horizontal pipe section (7). The device is characterized in that the gasifier top seal head (5) is provided with a seal head nozzle (1); the middle of the high temperature resistant vertical pipe section (6) is provided with a vertical pipe section middle nozzle (2); the top of the high temperature resistant vertical pipe section (6) is provided with a vertical pipe section top nozzle (3); and the high temperature resistant horizontal pipe section (7) is provided with a horizontal pipe section nozzle (4). The device of the invention has the following advantages: the technological process is simple, the device is easy to realize, the investment is low, the temperature of coal gas which is at the outlet of the fluidized bed gasifier and moves to the next process, is easy to regulate and control.

Description

technical field [0001] The invention relates to a method and device for reducing the temperature of high-temperature gas, in particular to a device and method for regulating the temperature of the gas at the outlet of a fluidized bed gasification furnace and going to subsequent processes. Background technique [0002] Gasification technology is used in industrial production to produce coal gas for syngas or fuel gas by gasifying coal, petroleum coke, biomass and their mixtures. Currently, coal gasification technologies mainly include fixed bed gasification, fluidized bed gasification and entrained bed gasification. Compared with fixed bed gasification technology and entrained bed gasification technology, fluidized bed gasification technology has the advantages of wide adaptability of raw coal types and moderate gasification temperature, etc., and has better development prospects. The gasification temperature of the fluidized bed gasifier is generally controlled between 800°...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C10J3/56C10J3/54C10J3/72C10J3/82
Inventor李庆峰原丰贞陈寒石苏春生王洋王芙蓉房倚天王建丽黄戒介郑伟
OwnerSHANXI INST OF COAL CHEM CHINESE ACAD OF SCI