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Boiler coking inhibitor

A coking inhibitor and boiler technology, applied in the chemical field, can solve the problems of high cost, reduce production costs, and narrow the scope of application, and achieve the effects of remarkable decoking effect, good decoking effect and wide applicability.

Inactive Publication Date: 2013-08-07
SHENZHEN MINGDENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the nitrate in the decoking agent will decompose and release oxygen at high temperature, which plays a role in supporting combustion, but it will also release highly toxic nitrogen oxides, which is neither safe nor environmentally friendly
And other components in the above-mentioned decoking agent, such as nitrate, potassium permanganate, modified nano-alumina, modified nano-magnesia and active metal powder, etc., have expensive raw materials, which is not conducive to reducing production costs
Patent 200510096074.0 also discloses a chromium-based slag-removing dust-clearing energy-saving agent composition, which contains chromic anhydride, chromium chloride, copper sulfate, zinc nitrate and other substances, which are relatively expensive and are not conducive to reducing production costs
In addition, the above-mentioned decoking agent also has a great defect, that is, the scope of application is narrow, and it is only suitable for a small number of boilers, and it is only effective for a certain temperature range of the boiler.
Foreign decoking agents are generally composed of magnesium base and flame retardant, and the price is higher than that of similar domestic products.

Method used

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  • Boiler coking inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh the following components in percentage by weight: kaolin 65%, quicklime 19%, quartz powder 7%, sodium carbonate 9%; fully grind each component until the particle size reaches 500 mesh, and then mix the ground components The boiler coking inhibitor can be obtained evenly.

[0019] In other embodiments, the particle size of each component may range from 80-1000 mesh.

[0020] The boiler coking inhibitor prepared in this example was used to solve the problem of coking in the slope flue of the reverberatory furnace and the waste heat boiler. After 10 days of continuous use, all the old coke slag was automatically separated, and there was no new flow of coke and slag. The smoke temperature is significantly reduced.

Embodiment 2

[0022] Weigh the following components in percentage by weight: kaolin 69%, quicklime 17%, quartz powder 8%, sodium carbonate 6%; fully grind each component until the particle size reaches 500 mesh, and then mix the ground components The boiler coking inhibitor can be obtained evenly.

[0023] The boiler coking inhibitor prepared in this example was used to solve the problem of coking in the connecting flue of the Noranda furnace. After 10 days of continuous use, all the old coke slag was automatically separated, and there was no new flow of coke and slag. The temperature dropped significantly.

Embodiment 3

[0025] Weigh the following components in percentage by weight: 70% kaolin, 13% quicklime, 9% quartz powder, and 8% sodium carbonate; fully grind each component until the particle size reaches 500 mesh, and then mix the ground components The boiler coking inhibitor can be obtained evenly.

[0026] The boiler coking inhibitor prepared in this example was used to solve the problem of coking in the flue of the Isa furnace and the waste heat boiler. After 10 days of continuous use, all the old coke slag was automatically separated, and there was no new flow of coke and slag. The smoke temperature is significantly reduced.

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Abstract

The invention relates to the technical field of chemistry, and particularly relates to a boiler coking inhibitor. The boiler coking inhibitor comprises the following substances by weight percent of 40-80% of kaolin, 10-30% of quartz powder, 5-25% of quick lime, and 5-20% of sodium carbonate. The synergistic effect is generated by combined utilization of the kaolin, the quick lime, the quartz powder and the sodium carbonate, and cooperative use at specific ratio; and the boiler coking inhibitor is good in decoking effect, and wide in applicability, can be used for solving the problems of coking in radiation areas of boilers such as a coal-fired boiler, a steel smelting boiler, a biomass power plant boiler, an industrial coal-fired boiler, and a nonferrous metallurgical furnace, cohesive deposition of a convection zone, and smoke corrosion of a tail flue on equipment. Cheap kaolin, quick lime, quartz powder and sodium carbonate are utilized as materials; and the cost is low. The boiler coking inhibitor does not release toxic or harmful gas at high temperature, is green and environment-friendly, and accords with the development requirements of a green industry at present.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a boiler coking inhibitor. Background technique [0002] Boilers often have problems of coking and dust accumulation during use. The main causes of coking are insufficient air supply or insufficient air mixing during combustion, which can not achieve complete combustion and produce carbon monoxide, which greatly reduces the ash melting point; flame deflection; boiler overload operation; soot blowing and decoking are not enough timely. Boiler coking issues can reduce boiler efficiency and present a safety hazard. At present, the use of decoking agents is one of the main ways to prevent and deal with boiler coking and ash accumulation. [0003] Existing boiler decoking agents are mainly based on nitrates. For example, patent CN102337170A discloses a boiler decoking agent consisting of aluminum nitrate, borax, copper nitrate and ammonium nitrate; a boiler decoking agent disclos...

Claims

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Application Information

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IPC IPC(8): C10L9/10C10L10/04
Inventor 夏启斌胡高权谢宝庚
Owner SHENZHEN MINGDENG TECH
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