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Ash-coke-removal fire-aid anti-corrosion additive for use on fire-side of boiler

An additive and boiler fire technology, which is applied in the field of boiler additives, can solve the problems of inconvenient delivery, single function, large usage, etc., and achieve the effects of exempting coking operations, wide range of functions, and prolonging service life

Inactive Publication Date: 2007-11-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a four-effect additive for decoking, ash removal, combustion, anti-corrosion and anti-corrosion on the fire side of the boiler, which solves the problems of the existing boiler decoking additives such as large usage, inconvenient delivery, high price or single function.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: 5.25% KNO 3 , 2.5% KNO 2 , 14.7% Mg(NO 3 ) 2 ·6H 2 O, 1.7% Cu(NO 3 ) 2 ·3H 2 O, 2.8%Al(NO 3 ) 3 9H 2 O, 0.3%H 3 BO 3 , and the rest is water.

Embodiment 2

[0017] Example 2: 5.5% KNO 3 , 2% KNO 2 , 13.5% Mg(NO 3 ) 2 ·6H 2 O, 2.2% Cu(NO 3 ) 2 ·3H 2 O, 2.5%Al(NO 3 ) 3 9H 2 O, 0.5%H 3 BO 3 , and the rest is water.

Embodiment 3

[0018] Example 3: 7.5% KNO 3 , 2% KNO 2 , 12.5% ​​Mg(NO 3 ) 2 ·6H 2 O, 1.5% Cu(NO 3 ) 2 ·3H 2 O, 3.0% Al(NO 3 ) 3 9H2O, 0.3%H 3 BO 3 , and the rest is water.

[0019] The ratio of raw materials is determined according to the softening temperature and sulfur content of coal, the impurity level of oil, and the coking situation of boilers. There are three ways to use the medicament: spray it into the flame zone from the manhole. It should be used regularly for a long time, and the product must be fully atomized when spraying, otherwise the effect will be affected.

[0020] Product properties:

[0021] The physical and chemical parameters of the present invention are: appearance—light blue clear liquid; specific gravity—1.05~1.08; pH—3.5~6.5; viscosity (25°C)—3cPs; freezing point——8~-5°C; Boiling point——102~110℃.

[0022] Dosage

[0023] Clean industrial boilers and heating furnaces that have been sootblown or cleaned, spray once every 2 to 3 days, and use 1 liter ...

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PUM

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Abstract

The invention is a boiler flame-side dust-cleaning, coke-cleaning, combustion-supporting, corrosion-resistant four-effect additive, belonging to the additive field, and it is a water solution prepared of the following matters: KNO3 5-8wt%, KNO2 2-5wt%, Mg(NO3)2.6H2O 12-15wt%, Cu(NO3)2.3H2O 1.5-2.2wt%, Al(NO3)3.9H2O 2.5-4wt%, H3BO3 0.2-1.3wt% and the rest water. And its advantage is solving the problems of large dosage of coke-cleaning agent, hard to put in, environmental pollution, single effect, etc.

Description

technical field [0001] The invention belongs to the field of boiler additives, and in particular provides a four-effect additive for decoking, ash-removing, combustion-supporting and anti-corrosion on the fire side of a boiler. technical background [0002] Ash accumulation and coking on the fire side tube wall of industrial boilers and heating furnaces and the resulting high temperature corrosion and insufficient combustion are the four major problems on the fire side of boilers, which can bring huge disadvantages to the life, safe use and economic benefits of boilers The impact and hidden dangers will bring huge losses to the enterprise. The chemical additive method is a commonly used method for decoking and ash removal on the fire side of boilers in industry. At present, the main ash removal and decoking additives are mainly powder type ["Rare Earth High Efficiency Energy Saving Boiler Dedusting and Decoking Agent and Its Production Method", Application No. 200510041561....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/04C10L10/06
Inventor 李晓刚刘智勇
Owner UNIV OF SCI & TECH BEIJING
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