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Boiler coke restraining and removing agent

A decoking agent and boiler technology, applied in the direction of fuel additives, petroleum industry, solid fuel, etc., can solve the problems of inconspicuous coke suppression effect, low cost, small addition amount of liquid decoking agent, etc. Promote the loosening of coke and improve the effect of crystallization process

Inactive Publication Date: 2013-08-21
SNTO TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid type decoking agent has the advantages of small amount of addition, low cost, and no dead angle after spraying into the furnace; comprehensively analyzing the current patents of the decoking agent, the current decoking agent has a good decoking effect, but the coke suppression effect is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The components and their weight percentages in this embodiment are: oxidant 1, bulking agent 15, high temperature retention agent 2, water 82.

[0018] This product has been tried on a 300MW subcritical power plant boiler for two months. The coking thickness of each fire hole of the boiler is less than 30cm, and the ash melting point is increased by 50°C. During the test period, a large coke was dropped once.

Embodiment 2

[0020] The components and their weight percentages in this embodiment are: 2 oxidants, 10 bulking agents, 5 high-temperature retention agents, and 83 water.

[0021] This product has been tried on a 300MW subcritical power plant boiler for two months. The coking thickness of each fire hole of the boiler is less than 25cm, the ash melting point is increased by 100℃, and there is no large coke loss phenomenon.

Embodiment 3

[0023] The components and their weight percentages in this embodiment are: 3 oxidants, 8 bulking agents, 5 high-temperature retention agents, and 84 water.

[0024] This product has been tried on a 300MW subcritical power plant boiler for two months. The coking thickness of each fire hole of the boiler is less than 25cm, the ash melting point is increased by 80℃, and there is no phenomenon of large coke falling off.

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Abstract

The invention relates to a boiler coke restraining and removing agent capable of reducing and removing coal-fired boiler coke blocks. The boiler coke restraining and removing agent comprises the following components in percentage by weight: 5%-15% of swelling agent, 0.1%-5% of high-temperature retaining agent, and 1%-5% of oxidant. The swelling agent nitrate can penetrate into the coke, so that oxygen gas can be released inside the coke blocks to promote the carbon deposition layers inside the coke blocks to combust and promote the coke blocks to loosen; the high-temperature retaining agent can be retained in a furnace within a long time, so that on the one hand, the formation of bonded cokes is blocked, and on the other hand, the bonded cokes are gradually loosened and drop; the oxidant can be used for oxidizing ferrous oxide in the coal ash, improving the smelting point of combustion products, improving a crystallization process of solid particles, and effectively relieving coking and contaminating of the fused combustion products in a furnace chamber and a heated surface.

Description

[0001] technical field [0002] The invention relates to a coke suppressing and decoking agent, in particular to a boiler coking suppressing and decoking agent for reducing and removing coke blocks of coal-fired boilers. Background technique [0003] During the combustion process of coal-fired boilers, the minerals in the coal form coal ash. Due to the high combustion temperature and low ash melting point of coal-fired boilers, coal ash in molten and semi-molten state usually deposits and sticks on the heating surface of the boiler in the form of coking and contamination. Once coking is formed, it will cause the temperature of superheated and reheated steam to rise, and coking will reduce the output of the boiler. In severe cases, it will cause forced shutdown and shorten the service life of boiler equipment; 1. The transportation of the slag crusher is difficult. In severe cases, the slag ditch will be blocked, and the load can only be reduced; the low load will ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10C10L10/00C10L10/04
Inventor 不公告发明人
Owner SNTO TECH GRP
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