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A kind of coal combustion accelerant

A combustion-supporting agent and coal-burning technology, applied in the field of coal-burning combustion-supporting agent, can solve the problems of unenvironmental protection, deactivation of salts or oxides, and little effect of fuel combustion promotion.

Active Publication Date: 2011-12-28
安徽海螺材料科技股份有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0004] The first type of combustion-supporting agent with strong oxidant as the main raw material has a certain effect on reducing the ignition point of the material and promoting combustion, but the fast-flammable strong oxidant has poor stability, decomposes rapidly after being heated, and has an effect on the combustion system. Short time, limited practical effect
At the same time, the quick and strong oxidizing agent is a flammable and explosive material, which is prone to safety problems during processing, transportation, storage and use.
[0005] The second type of combustion-supporting agent for coal essentially focuses on the catalytic combustion-supporting effect of metal ions, and its output is large. Since the solid mineral particles of a certain size are selected, they must be dried, decomposed, and diffused before they can play their role.
If it is not selected properly, it will lead to a decrease in catalytic combustion efficiency, a large amount of waste residue and fly ash, and is not environmentally friendly.
[0006] The third type of coal combustion accelerant is essentially only equivalent to increasing the volatility of the fuel, and has little effect on promoting the combustion of the fuel itself.
In addition, considering the large amount of combustion aid added, it basically has no effect on boiler coking, low-load stable combustion, and environmental pollution reduction, thus limiting its use.
[0007] The fourth category is mainly metal carboxylates. Due to the instability and low organic solubility of metal carboxylates, they are easy to form salts or inactivate oxides during combustion.
It is also difficult to meet the requirements of continuous, stable and efficient combustion, prevention of slagging and high temperature corrosion
[0008] Therefore, the coal-fired combustion-supporting agent used in the prior art has the following problems: 1. The safety of the catalyst during processing, transportation, storage and use cannot be guaranteed; 2. The catalytic combustion-supporting efficiency is low and the environmental pollution is large

Method used

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  • A kind of coal combustion accelerant
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preparation example Construction

[0053] The present invention also provides a method for preparing a coal-fired combustion accelerant, comprising: mixing 35-50% of the catalyst and 5-10% of the dispersant by weight percentage, and stirring at a high speed to obtain a catalyst solution;

[0054] Mix the catalyst solution with 5-10% of the emulsifier, 35-50% of the oxidant, and 5-10% of the penetrant, and shear emulsify to obtain a coal-burning combustion aid;

[0055] Wherein the oxidant is a mixture of nitrophenol and methyl tert-butyl ether; the catalyst is a nanoscale metal oxide.

[0056] According to the present invention, the catalyst is mixed with the dispersant to obtain a catalyst solution; the preparation of the catalyst solution is carried out in a high-speed stirring device, preferably a high-speed mixer, and the speed adjustment range of the high-speed mixer is preferably 80rpm-1250rpm, and more preferably the speed is 100 rpm. ~200rpm, most preferably 150rpm to mix the catalyst solution with emul...

Embodiment 1

[0059] According to the raw material formula of Example 1 in Table 1, nano-cerium dioxide, nano-titanium dioxide, nano-iron oxide and polyethylene glycol 200 were mixed and stirred at a high speed to obtain a catalyst solution, and nonylphenol polyoxygen was sequentially added to the catalyst solution. Vinyl ethers and sulfated castor oil, m-nitrophenol, methyl tert-butyl ether, sodium laureth sulfate, fatty alcohol polyoxyethylene ether phosphates, alkyl phosphates, shear emulsified, high speed Stir to obtain the coal-fired combustion accelerant. The above operations were all carried out under normal temperature and pressure. When preparing the catalyst solution, the speed of the high-speed stirrer was 150 rpm. During shear emulsification, the rotational speed of the emulsifier is 8000rpm. The processing speed of the emulsifier is 3000L / H.

Embodiment 2

[0061] According to the raw material formula of Example 2 in Table 1, nano-cerium dioxide, nano-titanium dioxide, nano-iron oxide and polyethylene glycol 200 were mixed and stirred at a high speed to obtain a catalyst solution, and nonylphenol polyoxygen was sequentially added to the catalyst solution. Vinyl ethers and sulfated castor oil, m-nitrophenol, methyl tert-butyl ether, sodium laureth sulfate, fatty alcohol polyoxyethylene ether phosphates, alkyl phosphates, shear emulsified, high speed Stir to obtain the coal-fired combustion accelerant. The above operations were all carried out under normal temperature and pressure. When preparing the catalyst solution, the speed of the high-speed stirrer was 150 rpm. During shear emulsification, the rotational speed of the emulsifier is 8000rpm. The processing speed of the emulsifier is 3000L / H.

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Abstract

The invention provides a coal combustion improver which comprises 5 to 10 percent of dispersing agent, 5 to 10 percent of penetrant, 35 to 50 percent of oxidizing agent, 35 to 50 percent of catalyst and 5 to 10 percent of emulsifying agent, wherein the oxidizing agent is a mixture of nitrophenol and methyl tertiary butyl ether; and the catalyst is nano-scale metallic oxide. The coal combustion improver provided by the invention has high combustion improving efficiency and is safe and environmental-friendly. The invention also provides a method for preparing the coal combustion improver.

Description

technical field [0001] The invention relates to the field of combustion aids and their preparation, in particular to a coal-burning combustion aid. Background technique [0002] my country is a large coal-producing country, but also a large coal-consuming country. Since the founding of the People's Republic of China, coal has accounted for about 75% of my country's primary energy consumption. It is expected that this proportion will still reach more than 50% by 2050. In a relatively long period of time, coal will still be in a dominant position in the field of energy utilization in our country. Building a resource-saving and environment-friendly society is a long-term task in our country. Therefore, rational use of coal resources and improvement of coal combustion efficiency not only have high economic benefits, but also have great social significance. At present, the use of coal-fired combustion accelerant is the main way to improve the efficiency of coal combustion. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
Inventor 冯恩娟傅秀新赵洪义朱化雨
Owner 安徽海螺材料科技股份有限公司
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