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Fire coal desulfurization and denitrification decoking additive and preparation process thereof

A technology of desulfurization, denitrification and additives, which is applied in the field of clean coal, can solve the problems of poor desulfurization effect and low desulfurization rate, and achieve the effects of improving the small combustion environment, reducing the blackness of exhaust smoke, and reducing emissions

Active Publication Date: 2012-07-04
窦崇庆 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3. The single sulfur fixation and desulfurization technology in combustion fails to solve the problem of sulfur fixation and secondary release in the high temperature area above 900 °C, the desulfurization rate is low, and the desulfurization effect is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Preparation of pulverized coal additives: 20% sodium carbonate, 10% magnesium oxide, 13% silica, 6% zinc oxide, 8% manganese dioxide, 7% barium oxide and 3% copper oxide was sequentially added and stirred for 20 minutes, then 25% activated calcium oxide and 8% ammonium bicarbonate were added and stirred for 10 minutes, and mixed uniformly to obtain a coal powder additive;

[0017] 2) Preparation of catalytic activator: stir 20% of activated calcium oxide, 30% of activated alumina, and 20% of light burnt magnesium for 15 minutes, and then add 20% of activated carbon and 10% of calcium ammonium nitrate to stir. The catalyst activator is uniformly obtained.

Embodiment 2

[0019] 1) Preparation of pulverized coal additives: Add 8% sodium carbonate, 15% magnesium oxide, 15% silicon dioxide, 8% zinc oxide, 8% manganese dioxide, 6% barium oxide and 5% copper oxide was sequentially added and stirred for 20 minutes, then 30% activated calcium oxide and 5% ammonium bicarbonate were added and stirred for 10 minutes, and mixed uniformly to obtain a coal powder additive;

[0020] 2) Preparation of catalytic activator: stir 30% activated calcium oxide, 20% activated alumina, and 20% light burnt magnesium for 15 minutes according to mass percentage, then add 25% activated carbon and 5% calcium ammonium nitrate and stir. The catalyst activator is uniformly obtained.

Embodiment 3

[0022] 1) Preparation of pulverized coal additives: 18% sodium carbonate, 5% magnesium oxide, 14% silicon dioxide, 7% zinc oxide, 7% manganese dioxide, 8% barium oxide and 5% copper oxide was sequentially added and stirred for 20 minutes, then 28% activated calcium oxide and 8% ammonium bicarbonate were added and stirred for 10 minutes, and mixed uniformly to obtain a coal powder additive;

[0023] 2) Preparation of catalytic activator: stir 28% activated calcium oxide, 18% activated alumina, 20% calcined magnesium for 15 minutes, and then add 24% activated carbon and 10% calcium ammonium nitrate and stir evenly Get the catalytic activator.

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Abstract

The invention provides a fire coal desulfurization and denitrification decoking additive and a preparation process thereof. The fire coal desulfurization and denitrification decoking additive comprises a coal dust additive, which is added to the fire coal, and a catalytic activator, which is added to a slurry tank of a desulfurization system; and the preparation process comprises the following steps of: first, adding sodium carbonate, magnesium oxide, silicon dioxide, zinc oxide, manganese dioxide, copper oxide and barium oxide in sequence and stirring the mixture for 20 minutes; and then adding active calcium oxide and ammonium bicarbonate, and stirring the mixture for 10 minutes; uniformly mixing the mixture to obtain the coal dust additive; first stirring the active calcium oxide, active aluminum oxide and caustic calcined magnesite for 15 minutes; and then adding active carbon and calcium ammonium nitrate, and uniformly stirring the mixture to obtain the catalytic activator. According to the invention, without changing the traditional boiler and desulfurization equipment as well as the process thereof, the user selects corresponding additive and catalytic activator provided by the invention according to physical and chemical indexes of the coal so as to produce coal-saving, desulfurization, denitrification and decoking effects. During using high sulfur coals, the desulfurization efficiency is obviously increased and the SO2 emission reduction reaches the standard.

Description

Technical field [0001] The invention belongs to the technical field of clean coal, and specifically relates to a coal-fired desulfurization, denitrification and coking additive for various coal-fired boilers and kilns and a preparation process thereof. Background technique [0002] At present, there is no simultaneous combustion and coal saving and SO at home and abroad. 2 , NO X , CO 2 Additives with multiple functions such as emission reduction, ash removal and coke removal, and single-function coal-saving and emission reduction technologies are as follows: [0003] 1. Desulfurization before combustion: desulfurize the raw coal by centralized washing and molding. The main problem is that the structural sulfur or organic sulfur in coal cannot be removed; and the cost is high, especially for coal used in power plants. [0004] 2. Flue gas desulfurization: The flue gas desulfurization device (FGD) is mainly used. The problem is that the cost is huge, the operating cost is high, and ...

Claims

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Application Information

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IPC IPC(8): C10L9/10
Inventor 窦崇庆张志洪杨怀珍雷积寿雷宏洲
Owner 窦崇庆
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