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Liquid coke inhibitor

A decoking agent, liquid technology, applied in the field of chemistry, can solve the problems of large usage and high usage cost, achieve the effects of less usage, low cost, and increase the temperature of exhaust gas

Inactive Publication Date: 2012-01-25
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Three, the amount of use is large, and the amount added generally reaches more than five thousandths, resulting in high cost of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this embodiment, the components and their weight percentages are: 10% organic surfactant, 20% nitrate, and 70% water.

[0020] The product has been tried on a 300MW subcritical power plant boiler for two months, and the coking condition is good. The large coking removal rate is over 98%, the small coking remains below 20cm, and the exhaust gas temperature rises by 4°C.

Embodiment 2

[0022] The components and their weight percentages in this example are: 20% organic surfactant, 10% nitrate, and 70% water.

[0023] The product has been tried on a 300MW subcritical power plant boiler for two months. The coking condition is good. The large coking removal rate is over 97%, the small coking remains below 20cm, and the exhaust gas temperature rises by 5°C.

Embodiment 3

[0025] The components and their weight percentages in this example are: 12 organic surfactants, 12 nitrates, and 76 water.

[0026] The product has been tried on a 300MW subcritical power plant boiler for two months, and the coking condition is good. The large coking removal rate is over 98%, the small coking remains below 19cm, and the exhaust gas temperature rises by 4°C.

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PUM

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Abstract

The invention discloses a liquid coke inhibitor, and belongs to the technical field of clean coal combustion. Main active ingredients of the liquid coke inhibitor are an organic surfactant and nitrate. When the organic surfactant is at high temperature, an organic polymer compound has a dirt cleaning effect, and the organic polymer compound is reacted at high temperature to generate a large number of air bubbles so as to make coke blocks loose. The nitrate can generate microexplosion and release oxygen at high temperature, can continuously release oxygen in a range from low temperature to high temperature to make soot formation and carbon deposition layers on different parts loose and contribute to more fully combusting pulverized coal; metal ions in the nitrate can promote low melting point compounds in a coke layer to be converted into loose high melting point compounds, which can contribute to removing a coking layer and prevent high temperature corrosion.

Description

[0001] technical field [0002] The invention belongs to the field of chemistry, and in particular relates to a liquid decoking agent for removing dust deposits in boilers and inhibiting coking in boilers. Background technique [0003] During the coal-fired combustion process of the coal-fired boiler, the heating surface of the water-cooled wall pipe is coked, and the pipes of the passer and reheater accumulate dust, the heat exchange efficiency of the boiler decreases, the exhaust gas temperature rises, and the energy consumption increases. The heating surface of the pipeline is prone to sulfate corrosion due to severe coking, shortening the service life of the boiler, etc. These problems will seriously affect the boiler safety and economical operation. The ash removal and coking treatment of industrial boilers and large power plant boilers is a technical problem. Usually, two methods are used to manually remove ash and decoke by stopping the boiler or use a chemical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00C10L10/04C10L10/18
Inventor 李启云彭飞
Owner SNTO TECH GRP
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