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Modification method of high-rank coal for slag-tap boiler of entrained flow bed

A liquid slag discharge and high-rank coal technology, applied in the field of coal chemical industry, can solve the problems of high cost, high coal quality requirements, difficult coal blending, etc., and achieve the goals of widening the selection range, reducing raw material and operating costs, and prolonging the service life Effect

Inactive Publication Date: 2016-08-17
SHANXI LUAN COAL BASED CLEAN ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for modifying high-rank coal in an entrained flow bed liquid slagging furnace. Through the modification of coal, the requirements for the use of a liquid slagging furnace can be met, and at the same time, coal quality can be stabilized to solve the problem of entrained bed The liquid slagging furnace has high requirements on coal quality, which causes difficulty in coal blending and high cost caused by coal blending

Method used

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  • Modification method of high-rank coal for slag-tap boiler of entrained flow bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Shanxi Lu'an Yuwu coal was used as the test coal. Shanxi Lu'an Yuwu coal belongs to high-rank coal and is a bituminous coal with a high degree of coalification. It has high carbon content and high calorific value. It is not suitable for entrained bed liquid slag removal furnace.

[0015] Take 93 tons of SiO 2 , 2 tons of Fe 2 o 3 , 0. 6 tons of Al 2 o 3 Mix evenly and pulverize into 200-mesh powder to prepare Modifier A;

[0016] Take 93 tons of CaCO 3 , 2 tons of MgCO 3 , 1 ton of CaO and 0.5 ton of MgO were mixed uniformly and pulverized into a powder of <1 mm to prepare Modifier B;

[0017] Take 10 tons of Lu'an coal, add 350kg of modifier A and 650kg of modifier B to it, and mix well. After testing, the homogenization effect of coal quality is obvious, and the fluctuation range of various indicators is obviously smaller.

[0018] Industrial trial firing

[0019] The modified Lu'an coal was fired in a Shell furnace for a period of 7 days. The operation of ...

Embodiment 2

[0024] A high-sulfur coal in Linfen, Shanxi was used as the test coal, and the high-sulfur coal was high-rank coal. The coal quality indicators are as follows:

[0025] Mad / % Aad / % Vad / % St,ad ,% Ash melting point M166 0.93 16.32 16.04 3.04 >1500

[0026] Poor viscosity, it is not suitable for entrained bed liquid slagging furnace.

[0027] Take 95 tons of SiO 2 , 2.5 tons of Fe 2 o 3 , 1 ton of Al 2 o 3 Mix evenly and pulverize into 200-mesh powder to prepare Modifier A;

[0028] Take 95 tons of CaCO 3 , 2.5 tons of MgCO 3 , 2 tons of CaO and 1 ton of MgO were mixed uniformly and pulverized into a powder of <1 mm to prepare Modifier B;

[0029] Take 10 tons of high-sulfur coal, add 400Kg of modifier A and 300Kg of modifier B to the coal, and mix well.

[0030] A 30-day industrial trial burning of the mixed coal was carried out in a Shell furnace. The operation of the gasifier is safe and stable, all indicators are controlled ...

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Abstract

The invention aims at providing a modification method of high-rank coal for a slag-tap boiler of an entrained flow bed. A modifier A whose weight is 3-5% of the weight of the high-rank coal and a modifier B whose weight is 3-8% of the weight of raw coal are added into the high-rank coal, and uniform mixing is carried out. Modification of coal satisfies usage requirements of the slag-tap boiler, and at the same time stabilization of coal quality is realized; problems of coal blending difficulty due to high requirements on coal quality of the slag-tap boiler of the entrained flow bed and high cost due to coal blending difficulty are solved.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a method for modifying high-rank coal. The modified high-rank coal can be used in an entrained bed liquid slagging furnace. Background technique [0002] Entrained bed liquid slagging furnace is one of the most advanced coal gasification furnaces in the world. It is widely used because of its large scale, high carbon conversion rate, high thermal efficiency, energy saving and environmental protection. However, its unique structure and process are The requirements for coal quality are also more stringent, and accidents such as equipment damage and parking due to coal quality problems continue one after another. [0003] The entrained bed liquid slag removal furnace adopts a water-cooled wall structure. With the slag-resistant slag-resistant operation mechanism, it needs to react at high temperature to ensure that a certain thickness of slag is attached to the wate...

Claims

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Application Information

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IPC IPC(8): C10J3/46C10L9/10
Inventor 李晋平肖亚宁李卫东马军祥王建斌易海龙郭志鹏付鹏兵
Owner SHANXI LUAN COAL BASED CLEAN ENERGY
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