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Apparatus and method for coal powder cyclone entrained flow gasification

A gasification device and entrained bed technology, which is applied in the field of pulverized coal cyclone entrained bed gasification devices, can solve the problems of thermal damage to the furnace wall surface, short residence time, low carbon conversion rate, etc., so as to improve work safety and disperse heat. Load, the effect of improving carbon conversion rate

Inactive Publication Date: 2013-02-27
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the traditional gasification furnace nozzle is easy to burn, the residence time of dry coal powder in the furnace is short, the carbon conversion rate of coal powder gasification is low, and the liquid slag formed after coal powder gasification will not stay On the wall, the furnace wall is vulnerable to thermal and chemical corrosion of high-temperature acid gas, and a pulverized coal cyclone entrained bed gasification device is provided

Method used

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  • Apparatus and method for coal powder cyclone entrained flow gasification
  • Apparatus and method for coal powder cyclone entrained flow gasification
  • Apparatus and method for coal powder cyclone entrained flow gasification

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specific Embodiment approach 1

[0021] Specific implementation mode one: combine Figure 1 to Figure 4 Describe this embodiment, this embodiment comprises cylindrical gasification chamber 1, slag pool 2, top nozzle 3, furnace top 4 and four oxidant nozzles 5, furnace top 4 is arranged on the top of cylindrical gasification chamber 1, slag pool 2 is arranged at the bottom of the cylindrical gasification chamber 1, the lower side wall of the cylindrical gasification chamber 1 is provided with a crude synthesis gas outlet 1-1, the top nozzle 3 is arranged on the furnace roof 4, and the axis of the top nozzle 3 is in line with the cylinder The axis of the gasification chamber 1 coincides, the top nozzle 3 is composed of an inner cylinder 3-3 and an outer cylinder 3-4, the inner cylinder 3-4 is arranged in the outer cylinder 3-5, and the inner cavity of the inner cylinder 3-4 is pulverized coal The nozzle 3-1, the cavity between the inner cylinder 3-4 and the outer cylinder 3-4 is a steam nozzle 3-2, and four oxi...

specific Embodiment approach 2

[0022] Specific implementation mode two: combination Figure 4 To illustrate this embodiment, the four oxidant nozzles 5 of this embodiment are arranged at the same height, and the acute angle α between the axis of each oxidizer nozzle 5 and the diameter of the cylindrical vaporization chamber 1 is 25° to 50°. The jet extension lines of the oxidizer nozzle 5 are all tangent to the inscribed circle K. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 5 To illustrate this embodiment, the four oxidant nozzles 5 of this embodiment are arranged in two layers on the side wall of the cylindrical gasification chamber 1, two oxidant nozzles 5 are arranged on each layer, and the oxidant nozzle 5 on the upper layer is the upper layer oxidant nozzle 5- 1. The lower oxidant nozzle 5 is the lower oxidant nozzle 5-2, the two upper oxidant nozzles 5-1 are arranged at the same height, and the two upper oxidant nozzles 5-1 are arranged diagonally, and the two lower oxidant nozzles 5-2 They are arranged at the same height, and the two lower layer oxidant nozzles 5-2 are arranged diagonally, the acute angle α between the axis of each oxidant nozzle 5 and the diameter of the cylindrical gasification chamber 1 is 25°-50°, and the two upper layer The jet extension lines of the oxidizer nozzle 5-1 and the two lower layer oxidizer nozzles 5-2 are all tangent to the inscribed circle K....

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Abstract

The invention provides an apparatus and a method for coal powder cyclone entrained flow gasification, and relates to a gasification furnace and a gasification method. In the prior art, a nozzle of the traditional gasification furnace is easily subjected to overburning, a residence time of dry coal powder in the furnace is short, and liquid residue formed by coal powder gasification does not stay on the wall surface. With the present invention, the problems in the prior are solved. According to the apparatus, a top nozzle is arranged on the top of a furnace, a cavity between an inner cylinder and an outer cylinder is a water vapor nozzle, and four oxidation agent nozzles are uniformly distributed and arranged along the outer wall on the upper end of a cylindrical gasification chamber. According to the method, 1, pressure in the cylindrical gasification chamber is 3 Mpa, and an operation temperature is 1500 DEG C; 2, dry coal powder is conveyed into a hearth with a coal powder nozzle through N2 or CO2 carrying in a direct current manner or a cyclone manner, and water vapor is conveyed into the hearth with a water vapor nozzle; and 3, oxygen is conveyed into the hearth concurrently through the four oxidation agent nozzles, and a layer of a molten slag film is formed on the inner wall of the cylindrical gasification chamber, and is subjected to a gasification reduction reaction under a high temperature condition to generate synthesis gas so as to achieve coal powder cyclone gasification. The apparatus and the method are applicable for clean coal gasification.

Description

technical field [0001] The invention relates to a gasification furnace and a gasification method, in particular to a pulverized coal cyclone airflow bed gasification device and method. Background technique [0002] Entrained bed gasification technology has become the main development direction of modern coal gasification technology because of its advantages of large processing capacity, high carbon conversion rate and high cold gas efficiency. Entrained bed gasification has two main characteristics. One is that the operating temperature is relatively high, about 1300-1600 ° C. The ash and slag formed in the furnace is liquid, and the slag discharge method is liquid slag discharge; In the furnace, in order to protect the furnace wall material and reduce heat loss, the "slag-resistant slag" technology is adopted, that is, the liquid slag produced by gasification adheres to the furnace wall surface to form a slag film, and its small thermal conductivity is used as a refractory ...

Claims

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Application Information

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IPC IPC(8): C10J3/48C10J3/72
Inventor 邱朋华刘欢鹏刘栗谭建宇石旭杜昌帅赵岩秦裕琨吴少华孙绍增
Owner HARBIN INST OF TECH
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