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A coke slag conditioning and tempering decoking agent suitable for high-sodium coal, its preparation method and application

A technology of decoking agent and high-sodium coal, which is applied in the direction of fuel additives, petroleum industry, solid fuel, etc., and can solve problems such as poor and effective utilization of coal resources, restrictions on the development of coal power industry, and coke cleaning accidents caused by boiler shutdown , to avoid low-temperature eutectic, reduce the formation of alkali metal vapor, and reduce the effect of mechanical strength

Active Publication Date: 2018-02-16
山东默锐环境产业股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These coals have the characteristics of high volatile content and low ash content. They seem to be excellent power fuels, but due to problems such as excessive sodium oxide content, there are serious contamination and coking problems, which can easily cause boiler shutdown and coke cleaning accidents during the combustion process. , the loss is huge, which greatly limits the development of the coal power industry, resulting in a large amount of coal resources not being well and effectively utilized, resulting in a waste of resources
At present, in order to reduce the pollution and coking of high-sodium coal, people generally use blending to alleviate the problem, but due to the limitation of blending ratio, the fuel cost is greatly increased

Method used

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  • A coke slag conditioning and tempering decoking agent suitable for high-sodium coal, its preparation method and application
  • A coke slag conditioning and tempering decoking agent suitable for high-sodium coal, its preparation method and application

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Effect test

Embodiment 1

[0041] A coke slag conditioning type decoking agent suitable for high-sodium coal. The raw material components of the decoking agent and their weight percentages are as follows:

[0042] Magnesium oxide 62%, kaolin 26%, bentonite 5%, copper nitrate 1%, potassium permanganate 2%, nickel chloride 2%, dispersant 2%.

[0043] The decoking agent according to the embodiment of the present invention is directly and uniformly mixed with Zhundong coal at a ratio of 5‰, and is burned in the test boiler, and the combustion temperature is stable, and the sample is taken with a sampling tube. Compared with the sampling of Zhundong coal in the test boiler under the same working conditions without adding the decoking agent pointed out by the present invention, the pollution and coking quality per unit time and internal unit area are less than those without the addition of the decoking agent pointed out by the present invention. The time is reduced by more than 35%, the ash collection efficie...

Embodiment 2

[0045] A coke slag conditioning type decoking agent suitable for high-sodium coal. The raw material components of the decoking agent and their weight percentages are as follows:

[0046] Magnesium hydroxide 87%, kaolin 10%, bentonite 0%, copper sulfate 1.5%, manganese oxide 2%, nickel nitrate 0.5%, dispersant 2%.

[0047] The decoking agent of this embodiment is sent into the injection device through the frequency conversion screw feeder, and then sprayed into the combustion area in the furnace by the injection device.

[0048] The specific application method is as follows:

[0049] The decoking agent is sprayed into the coking hole or fire viewing hole of the boiler body of the existing coal-fired power plant, and it is equipped with a frequency conversion sleeve feeding system and a storage bin. The structure is as follows: figure 1 As shown, the decoking agent of this embodiment is put into the storage bin (6), and the mass of the decoking agent that needs to be added per un...

Embodiment 3

[0051] A coke slag conditioning type decoking agent suitable for high-sodium coal. The raw material components of the decoking agent and their weight percentages are as follows:

[0052] Magnesium chloride 70%, kaolin 13%, bentonite 10%, copper chloride 1%, potassium permanganate and manganese oxide 2%, nickel oxide 1%, dispersant 3%.

[0053] Add the decoking agent of this embodiment to the inlet of the powder feeder or the pulverized coal air duct through compressed air. The amount of the decoking agent added is 0.5‰ of the weight of the high-sodium coal. into the furnace for combustion.

[0054] The specific application method is as follows:

[0055] The feeding system used is equipped with a frequency conversion sleeve feeding system and a storage bin at the entrance of the pulverizer in the existing coal-fired power plant, and the decoking agent is dosed quantitatively. The structure is as follows figure 2 As shown, the decoking agent of this embodiment is put into the...

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Abstract

The invention relates to a coke slag conditioning type decoking agent suitable for high-sodium coal and its preparation method and application. The raw material components of the decoking agent are as follows: 1% to 90% of magnesium compounds and 1% to 85% of kaolin , 0% to 92% of bentonite, 0.5% to 20% of copper compounds, 0.1% to 20% of oxidants, 0.1% to 10% of catalysts, and 0.5% to 3% of dispersants. The composition ratio of the magnesium compound, kaolin, bentonite, copper compound, oxidant, catalyst, and dispersant of the present invention can not only promote slagging and fall off in the combustion process of high-sodium coal, but also avoid low-temperature eutectic It can effectively control the release of alkali metals during the combustion of high-sodium coal, change the chemical composition and physical structure of coke slag by participating in the combustion, and prevent or reduce the contamination and coking of the heating surface of the boiler.

Description

technical field [0001] The invention relates to a coke slag tempered decoking agent suitable for high-sodium coal, a preparation method and application thereof, and belongs to the technical field of decoking agents. Background technique [0002] Xinjiang has very rich coal resources and is very concentrated. The total predicted resources are about 2.19 trillion tons, accounting for about 40.5% of China's predicted total coal resources. Xinjiang is becoming the focus of the national energy circle because of its rich coal resources. These coals have the characteristics of high volatile content and low ash content. They seem to be excellent power fuels, but due to problems such as excessive sodium oxide content, there are serious contamination and coking problems, which can easily cause boiler shutdown and coke cleaning accidents during the combustion process. , The loss is huge, which greatly limits the development of the coal power industry, resulting in a large amount of co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10C10L10/04
Inventor 李建业刘冬林路强陈坚强管志伟王志孝周文
Owner 山东默锐环境产业股份有限公司
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