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Boiler ash-cleaning and decoking agent and preparation method thereof

A decoking agent and ash cleaning technology, which is applied in fuel additives, petroleum industry, fuel and other directions, can solve the problems of aggravating the cost of decoking agent, lack of raw material sources, and insignificant effects, so as to alleviate the coking and wettability of flue gas. good, the effect of reducing pollution emissions

Inactive Publication Date: 2018-06-29
CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the current boiler ash and coke removal agent used in coal-fired boilers for trial use, the effect is not obvious, and some glass bodies are formed after being added to the furnace, which not only cannot remove the coke, but makes the coke more firm and wet The performance is poor, the use of rare earth oxides will increase the cost of the decoking agent, and the problem of lack of raw material sources, a boiler dust removal decoking agent and its preparation method are provided

Method used

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  • Boiler ash-cleaning and decoking agent and preparation method thereof

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preparation example Construction

[0021] A preparation method for a boiler dust removal and decoking agent, comprising the steps of:

[0022] According to the number of parts by mass, take 10~16 parts of auxiliary agent A, 6~9 parts of auxiliary agent B, 5~9 parts of auxiliary agent C, 3~5 parts of borax, 2~3 parts of silicon dioxide, 3~5 parts of chlorine Sodium chloride is mixed to obtain boiler ash and coke removal agent.

Embodiment 1

[0024] Auxiliary A: Take corn stalks and crush them through a 100-mesh sieve, collect the sieved particles, and steam-explode them at 0.35MPa for 120s. Take the steam-exploded products and add 15% sodium hydroxide solution at a mass ratio of 1:20. Keep for 18 hours, adjust the pH to 7, filter, take the filter residue, and dry to obtain the dried product. Take sodium dodecylbenzenesulfonate and add polyoxyethylene octylphenol ether-10 and deionized water according to the mass ratio of 1:2:10. Mix to obtain mixture A. In terms of parts by mass, take 10 parts of mixture A, 4 parts of butyl acrylate, 3 parts of methyl methacrylate, and 2 parts of acrylamide, and stir and mix at 35°C for 20 minutes to obtain mixture B. Take the mixture Add sodium persulfate to B at a mass ratio of 10:50:1, keep at 70°C for 1 hour, and cool down to obtain additive A.

[0025]Auxiliary B: Take ethanolamine and add it to absolute ethanol at a mass ratio of 3:5 to mix, stir and mix at 20°C for 30 minut...

Embodiment 2

[0030] Auxiliary A: Take corn stalks and crush them through a 100-mesh sieve, collect the sieved particles, and steam-explode them at 0.35MPa for 130s. Take the steam-exploded products and add 15% sodium hydroxide solution at a mass ratio of 1:20. Keep it for 24 hours, adjust the pH to 7.2, filter, take the filter residue, and dry to obtain the dried product. Take sodium dodecylbenzenesulfonate and add polyoxyethylene octylphenol ether-10 and deionized water according to the mass ratio of 1:2:10. Mix to obtain mixture A. In terms of parts by mass, take 15 parts of mixture A, 6 parts of butyl acrylate, 5 parts of methyl methacrylate, and 4 parts of acrylamide, and stir and mix at 40°C for 30 minutes to obtain mixture B. Take the mixture Add sodium persulfate to B at a mass ratio of 10:50:1, keep at 75°C for 2 hours, and cool down to obtain additive A.

[0031] Auxiliary B: Take ethanolamine and add it to absolute ethanol at a mass ratio of 3:5 to mix, stir and mix at 25°C for 4...

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Abstract

The invention discloses a boiler ash-cleaning and decoking agent and a preparation method thereof, which belong to the technical field of boiler decoking. After a cellulose molecule in a corn stalk ischemically activated, hydroxy sealed in a cellulose crystal is exposed and is initiated through an initiating agent so as to be subjected to grafting reaction with a monomer, and under the action ofthe initiating agent, the activated corn stalk, methyl methacrylate, butyl acrylate and acrylamide are in graft copolymerization synthesis, so that the boiler ash-cleaning and decoking agent is well-behaved in ash powder maturity inhibition, compressive strength, water-retaining property, water-absorbing property and freeze-thaw resistance, has an adsorption effect on ash content in a boiler, andcan be used for fixing ash powder in the boiler so as to remove the ash powder. The boiler ash-cleaning and decoking agent provided by the invention solves the problems that a current boiler ash-cleaning and decoking agent is not remarkable in effect when being used in the coal-fired boiler, forms a vitreous body after being added into a hearth, cannot remove coking but enables the cokes to be even more firm, and is poor in wettability, the cost of the decoking agent is increased due to the use of rare earth oxide, and the raw material source are deficient.

Description

technical field [0001] The invention belongs to the field of boiler decoking, and in particular relates to a boiler ash and decoking agent and a preparation method thereof. Background technique [0002] Boiler dust and coke removal agent is processed from inorganic compounds according to a certain proportion. The appearance is white granules and yellow powder crystals. The surface of each heat exchanger in the furnace makes the soot on the heating surface of the boiler porous and loose, so that it is easy to pulverize and fall off. my country is a big country that uses coal and is also rich in coal resources. However, the coal has high sulfur content, low calorific value, large ash content, and a large proportion of low-quality coal. Currently, chain furnace slag is commonly used as fuel again, and the slag with high carbon content has caused huge pollution to the environment. The coking and ash accumulation in the boiler operation process is a major problem plaguing my co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/04C10L10/06C10L10/02
Inventor 吴展牙郑薇程依
Owner CHANGZHOU DINGRI ENVIRONMENTAL PROTECTION TECH
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