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Energy-saving desulfurizer for fire coal and preparation method thereof

A desulfurizer and coal-fired technology, applied in fuel additives, fuels, solid fuels, etc., can solve the problems of reduced thermal efficiency of coal combustion, unsatisfactory environmental protection of sulfur dioxide, large desulfurization dosage, etc., and achieve the effect of solving high-temperature sulfur fixation

Inactive Publication Date: 2018-05-18
绵阳双甘科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One is to adopt the method of spraying calcium into the furnace or adding lime and coal mixed combustion: 1, spraying calcium in the furnace is that the boiler adopts circulating fluidized bed technology, and the shortcoming of this technology is: (1) 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 l

[0020] Embodiment 1: a kind of 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 made by mixing the above-mentioned components in proportion, and then using mechanical stirring and uniform sticking 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 th...

Embodiment 2

[0024] Embodiment 2: it is by lignite 54%, sodium phosphate 2%, polyaluminum chloride 4%, sodium carbonate 20%, limestone 16%, the mixture 1.5% of sodium acetate and potassium acetate, the mixture 2.5% 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.

[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] Embodiment 3: it is by lignite 58%, sodium phosphate 1%, polyaluminum chloride 3%, sodium carbonate 15%, limestone 18%, the mixture 2% of sodium acetate and potassium acetate, the mixture 3% 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. The rest are the same as the embodiment

[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

The invention relates to an energy-saving desulfurizer for fire coal and a preparation method thereof. The energy-saving desulfurizer is composed of, by weight, 38-62% of lignite, 1-3% of sodium phosphate, 2-6% of polyaluminum chloride, 14-23% of sodium carbonate, 14-24% of limestone, 1-3% of a mixture of sodium acetate and potassium acetate and 2-4% of a mixture of magnesium sulfate and magnesiumoxide. The desired amounts of the above components are prepared and then subjected to mechanical stirring for uniform mixing at normal temperature and normal pressure so as to prepare the energy-saving desulfurizer. The energy-saving desulfurizer for fire coal in the invention solves problems in high-temperature in-furnace sulfur fixation and energy conservation in the prior art; when used for treatment of coal smoke type sulfur dioxide pollution, the energy-saving desulfurizer allows sulfur dioxide to be discharged after reaching the standard without equipment investment at low cost or no cost; and the energy-saving desulfurizer is extensively applicable to desulfurization of raw coal with sulfur content of 0.8-6% applied to industrial fixed beds, fluidized beds, entrained-flow beds andcoal-fired 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 adopt the method of spraying calcium into the furnace or adding lime and coal mixed combustion: 1, spraying calcium in the furnace is that the boiler adopts circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10C10L10/04
CPCC10L9/10C10L10/04
Inventor 徐叶
Owner 绵阳双甘科技有限公司
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