Energy saving desulfurizer for bunker coal, and preparation method

A desulfurizer, coal-burning technology, applied in fuel additives, fuels, petroleum industries, etc., can solve the problems of reduced thermal efficiency of coal combustion, high cost, unsatisfactory environmental protection of sulfur dioxide, etc., and achieves the effect of solving high-temperature sulfur fixation

Active Publication Date: 2006-12-06
宜宾市蓝洁环保技术服务有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is to spray calcium into the furnace or add lime and coal for mixed combustion: 1. Calcium spraying in the furnace is a circulating fluidized bed technology for boilers. The disadvantages of this technology are: (1) the cost is too high; (2) Serious heat absorption (the thermal efficiency of coal combustion is reduced); (3) coal with high sulfur content cannot meet the national sulfur dioxide emission standards after combustion, and the desulfurization rate is only 20% to 30%
2. The raw coal is mixed with lime and coal and then burned in the boiler, and its disadvantages are the same as above
The disadvantage of this method is that the water body consumes a large amount of desulfurization, the cost is high, and the sulfur dioxide in the flue gas still does not meet the national sulfur dioxide emission standards.
In short, the cost of desulfurization products on the existing market is relatively high, and the environmental protection of sulfur dioxide is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: A coal-fired energy-saving desulfurizer

[0021] It consists of lignite 50%, sodium phosphate 2%, polyaluminum chloride 5%, sodium carbonate 18%, limestone 20%, a mixture of sodium acetate and potassium acetate 2%, a mixture of magnesium sulfate and magnesium oxide 3%, all of the above It is calculated by weight percentage; it is prepared by mixing the above-mentioned components according to the proportion, using mechanical stirring and uniform mixing under normal temperature and pressure.

[0022] Among the above components, the mixture of sodium acetate and potassium acetate, magnesium sulfate and magnesium oxide can be mixed in any proportion; the calcium oxide content of limestone is greater than 49%, and its particle diameter is not greater than 3mm; the particle size of the lignite The diameter is not greater than 8mm.

[0023] The weight percentage of the coal-fired energy-saving desulfurizer mixed with the raw coal is 5%, the sulfur content of the ra...

Embodiment 2

[0024] Example 2: It consists of lignite 54%, sodium phosphate 2%, polyaluminium chloride 4%, sodium carbonate 20%, limestone 16%, the mixture of sodium acetate and potassium acetate 1.5%, the mixture of magnesium sulfate and magnesium oxide 2.5% Composition, the above are all in weight percentage; it is prepared by mixing the above-mentioned components in proportion, and then uniformly mixing them under normal temperature and pressure with mechanical stirring. All the other are with embodiment 1.

[0025] The weight percentage of the coal-fired energy-saving desulfurizer mixed with the raw coal is 8%, the sulfur content of the raw coal is 4%, and the first-stage desulfurization process of furnace desulfurization is adopted, and the desulfurization efficiency obtained is 76.1%.

Embodiment 3

[0026] Example 3: It consists of 58% lignite, 1% sodium phosphate, 3% polyaluminum chloride, 15% sodium carbonate, 18% limestone, 2% mixture of sodium acetate and potassium acetate, 3% mixture of magnesium sulfate and magnesium oxide Composition, the above are all in weight percentage; it is prepared by mixing the above-mentioned components in proportion, and then uniformly mixing them under normal temperature and pressure with mechanical stirring. All the other are with embodiment 1.

[0027] The weight percentage of the coal-burning energy-saving desulfurizer and the raw coal is 10%, the sulfur content of the raw coal is 5.1%, and the first-stage desulfurization process of furnace desulfurization is adopted, and the desulfurization efficiency obtained is 64%.

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Abstract

This invention relates to a method for preparing desulfurization agent for coal. The desulfurization agent is composed of brown coal 38-62 wt.%, sodium phosphate 1-3 wt.%, polyaluminum chloride 2-6 wt.%, dosium carbonate 14-23 wt.%, lime stone 14-24 wt.%, sodium acetate and potassium acetate 1-3 wt.%, and magnesium sulfate and magnesium chloride 2-4 wt.%. The method comprises mixing the raw materials, and stirring mechanically. The desulfurization agent can solve the desulfurization and energy saving problems, and can be used for desulfurization of coal containing 0.8-6% sulfur used for fixed beds, fluidized beds, gas flow beds and coal boilers.

Description

technical field [0001] The invention relates to a coal-fired energy-saving desulfurizer and a preparation method thereof. Background technique [0002] In today's highly developed industry, coal is one of the most important energy sources. In cities and surrounding areas where power plants, industrial boilers and commercial boilers are highly concentrated, the pollutant sulfur dioxide produced by coal combustion is emitted into the air, accounting for 10% of the total amount of sulfur in the air. Around 67%. Air pollution is deteriorating the living environment of human beings. Controlling the emission of sulfur dioxide is an important part of controlling environmental pollution. [0003] At present, the existing desulfurizers for soot-type pollution control in the market are divided into two categories. One is to spray calcium into the furnace or add lime and coal for mixed combustion: 1. Calcium spraying in the furnace is a circulating fluidized bed technology for boiler...

Claims

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Application Information

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IPC IPC(8): C10L10/04
Inventor 张自强张杰刘晓丽
Owner 宜宾市蓝洁环保技术服务有限公司
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