A liquid decoker

A decoking agent, liquid technology, applied in the chemical field, can solve the problems of high use cost and large use amount, and achieve the effect of less use amount, low cost, and cheap and easy-to-obtain raw materials

Inactive Publication Date: 2016-09-28
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

[0018] In this embodiment, the components and their weight percentages are: 10% organic surfactant, 20% nitrate, and 70% water.

[0019] 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

[0021] The components and their weight percentages in this example are: 20% organic surfactant, 10% nitrate, and 70% water.

[0022] 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

[0024] The components and their weight percentages in this example are: 12 organic surfactants, 12 nitrates, and 76 water.

[0025] 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 decoking agent, which belongs to the technical field of clean coal combustion. The main active ingredients are organic surfactants and nitrates. Organic surfactants under high temperature conditions, on the one hand, the organic polymer compounds have a decontamination effect; on the other hand, the organic polymer compounds react under high temperature conditions to produce a large number of bubbles, which will promote the loosening of the coke. On the one hand, nitrate can “micro-explode” at high temperature and release oxygen, which can ensure continuous release of oxygen from low temperature to high temperature, promote the loosening of ash and carbon deposits in different parts, and help pulverized coal to burn more efficiently. On the other hand, metal ions in nitrate can promote the conversion of low-melting-point compounds in the coke layer into loose high-melting-point compounds, which can not only help to remove the coke layer, but also prevent high-temperature corrosion.

Description

technical field [0001] 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 [0002] 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 soot remover. ...

Claims

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Application Information

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