阅读说明：本技术 一种废渣锅炉抗焦结剂及添加方法 (Anti-coking agent for waste residue boiler and adding method ) 是由 刘运有 朱凯 于 2020-06-11 设计创作，主要内容包括：本发明提供一种废渣锅炉抗焦结剂及添加方法,涉及抗焦结剂技术领域。该废渣锅炉抗焦结剂及添加方法,包括如下重量份的原料：高岭土10-16份、氧化钙15-22份、粉煤灰8-16份、硝酸镁6-12份、镁基硝酸盐5-10份、硼酸5-10份、水20-30份、助燃剂5-8份、催化剂4-8、膨化剂7-13份。该废渣锅炉抗焦结剂及添加方法,采用本发明的配方和方法制备的锅炉抗焦结剂,科学合理,工艺简单,便于推广,在使用上,通过添加硝酸镁、镁基硝酸盐和硼酸,在使用上,可以加快锅炉结焦的分裂,从而使得锅炉上的结焦掉落,在使用上,可以有效的清除锅炉的结焦,同时通过助燃剂和催化剂,在使用上,可以有效的使得产生的有毒物质进行充分的燃烧,降低有毒物质的产生。(The invention provides a coking-resistant agent for a waste residue boiler and an adding method thereof, relating to the technical field of coking-resistant agents. The coke-resistant agent for the waste residue boiler and the adding method thereof comprise the following raw materials in parts by weight: 10-16 parts of kaolin, 15-22 parts of calcium oxide, 8-16 parts of fly ash, 6-12 parts of magnesium nitrate, 5-10 parts of magnesium-based nitrate, 5-10 parts of boric acid, 20-30 parts of water, 5-8 parts of combustion improver, 4-8 parts of catalyst and 7-13 parts of swelling agent. The boiler anti-coking agent prepared by the formula and the method is scientific and reasonable, has simple process and convenient popularization, can accelerate the splitting of boiler coking by adding magnesium nitrate, magnesium-based nitrate and boric acid in use, thereby leading the coking on the boiler to fall off, effectively removing the boiler coking in use, and simultaneously leading generated toxic substances to be fully combusted by the combustion improver and the catalyst in use, and reducing the generation of toxic substances.)

1. The anti-coking agent for the waste residue boiler is characterized by comprising the following raw materials in parts by weight: 10-16 parts of kaolin, 15-22 parts of calcium oxide, 8-16 parts of fly ash, 6-12 parts of magnesium nitrate, 5-10 parts of magnesium-based nitrate, 5-10 parts of boric acid, 20-30 parts of water, 5-8 parts of combustion improver, 4-8 parts of catalyst and 7-13 parts of swelling agent.

2. The slag boiler anti-coking agent according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 10 parts of kaolin, 15 parts of calcium oxide, 8 parts of fly ash, 6 parts of magnesium nitrate, 5 parts of magnesium-based nitrate, 5 parts of boric acid, 20 parts of water, 5 parts of combustion improver, 4 parts of catalyst and 7 parts of swelling agent.

3. The slag boiler anti-coking agent according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 13 parts of kaolin, 19 parts of calcium oxide, 12 parts of fly ash, 9 parts of magnesium nitrate, 8 parts of magnesium-based nitrate, 8 parts of boric acid, 25 parts of water, 7 parts of combustion improver, 6 parts of catalyst and 10 parts of swelling agent.

4. The slag boiler anti-coking agent according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 16 parts of kaolin, 22 parts of calcium oxide, 16 parts of fly ash, 12 parts of magnesium nitrate, 10 parts of magnesium-based nitrate, 10 parts of boric acid, 30 parts of water, 8 parts of combustion improver, 8 parts of catalyst and 13 parts of swelling agent.

5. The anti-coking agent for waste residue boilers as claimed in any one of claims 1 to 4, wherein the combustion improver is any one of boron organic compounds, copper salts of fatty acids and copper salts of naphthenic acids.

6. The coke-resistant agent for waste residue boilers as claimed in any one of claims 1 to 4, wherein the catalyst is any one of solid acid catalyst, metal oxide catalyst, complex catalyst, rare earth catalyst and biocatalyst.

7. The slag boiler anti-coking agent according to any one of claims 1 to 4, wherein the bulking agent is any one of ammonium nitrate, baking powder, baking soda and alum.

8. The anti-coking agent and the adding method for the waste residue boiler as claimed in any one of claims 1 to 4, wherein the method comprises the following steps:

s1, weighing the raw materials in proportion, putting kaolin, calcium oxide, fly ash, magnesium nitrate, magnesium-based nitrate, boric acid and water into a vertical stirrer for stirring, wherein the rotating speed of a stirring paddle is 250r/min, and the stirring time is 7-9 h;

s2, adding a combustion improver, a catalyst and a swelling agent in sequence after stirring in S1, and continuing stirring, wherein the rotating speed of a stirring paddle is 300r/min, and the stirring time is 4-6 h, so that the boiler anti-coking agent is prepared;

and S3, spraying compressed air into the high-temperature part inside the boiler from the observation hole of the boiler, and throwing the anti-coking agent into the coal thrower through the observation hole of the boiler by adopting the coal thrower.

9. The slag boiler anti-coking agent and the adding method thereof according to the claim 8, characterized in that in the operation step according to S3, the anti-coking agent is added 2-4 times a day.

Technical Field

The invention relates to the technical field of anti-coking agents, in particular to an anti-coking agent for a waste residue boiler and an adding method thereof.

Background

In the long-term operation process of the waste residue boiler, due to the problems of large change of coal quality for combustion, self defects of boiler design, local high temperature, improper operation and the like, coking and ash deposition of pipelines of a superheater and a reheater are easily generated on the heating surface of a water cooling wall, so that the heat exchange efficiency of the boiler is reduced, the exhaust gas temperature is increased, and the waste of coal resources is serious. When coking and dust deposition are serious, large coke blocks fall off to easily cause fire extinguishing accidents of the boiler, great potential safety hazards exist, at the moment, an enterprise usually needs to shut down the boiler to remove coking and dust deposition, great economic loss is caused to the enterprise, and meanwhile, the problem that sulfate corrodes the boiler wall is easily generated at the coking position, so that the service life of the boiler is shortened. However, in the prior art, most of the existing boiler coking problems adopt a mode of doping slag soil in fuel to relieve coking, but the quality of the boiler fuel is seriously reduced due to the addition of a large amount of slag soil, the coking inhibition effect is not ideal, and the problem cannot be fundamentally solved.

Disclosure of Invention

The invention aims to provide a waste residue boiler anti-coking agent and an adding method thereof, which can effectively remove coking of a boiler in use and can effectively reduce the generation of toxic gas in use.

In order to achieve the purpose, the invention is realized by the following technical scheme: the waste residue boiler anti-coking agent comprises the following raw materials in parts by weight: 10-16 parts of kaolin, 15-22 parts of calcium oxide, 8-16 parts of fly ash, 6-12 parts of magnesium nitrate, 5-10 parts of magnesium-based nitrate, 5-10 parts of boric acid, 20-30 parts of water, 5-8 parts of combustion improver, 4-8 parts of catalyst and 7-13 parts of swelling agent.

As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 10 parts of kaolin, 15 parts of calcium oxide, 8 parts of fly ash, 6 parts of magnesium nitrate, 5 parts of magnesium-based nitrate, 5 parts of boric acid, 20 parts of water, 5 parts of combustion improver, 4 parts of catalyst and 7 parts of swelling agent.

As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 13 parts of kaolin, 19 parts of calcium oxide, 12 parts of fly ash, 9 parts of magnesium nitrate, 8 parts of magnesium-based nitrate, 8 parts of boric acid, 25 parts of water, 7 parts of combustion improver, 6 parts of catalyst and 10 parts of swelling agent.

As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 16 parts of kaolin, 22 parts of calcium oxide, 16 parts of fly ash, 12 parts of magnesium nitrate, 10 parts of magnesium-based nitrate, 10 parts of boric acid, 30 parts of water, 8 parts of combustion improver, 8 parts of catalyst and 13 parts of swelling agent.

As a further scheme of the invention: the combustion improver is any one of boron organic compound, fatty acid copper salt and copper naphthenate salt.

As a further scheme of the invention: the catalyst is any one of a solid acid catalyst, a metal oxide catalyst, a complex catalyst, a rare earth catalyst and a biocatalyst.

As a further scheme of the invention: the swelling agent is any one of ammonium nitrate, baking powder, baking soda and alum.

A coke-resistant agent for a waste residue boiler and an adding method thereof comprise the following steps:

s1, weighing the raw materials in proportion, putting kaolin, calcium oxide, fly ash, magnesium nitrate, magnesium-based nitrate, boric acid and water into a vertical stirrer for stirring, wherein the rotating speed of a stirring paddle is 250r/min, and the stirring time is 7-9 h;

s2, adding a combustion improver, a catalyst and a swelling agent in sequence after stirring in S1, and continuing stirring, wherein the rotating speed of a stirring paddle is 300r/min, and the stirring time is 4-6 h, so that the boiler anti-coking agent is prepared;

and S3, spraying compressed air into the high-temperature part inside the boiler from the observation hole of the boiler, and throwing the anti-coking agent into the coal thrower through the observation hole of the boiler by adopting the coal thrower.

Further, in the operation step according to S3, the anti-coking agent is added in 2 to 4 times per day.

The invention provides a coke-resistant agent for a waste residue boiler and an adding method thereof. The method has the following beneficial effects:

the boiler anti-coking agent prepared by the formula and the method is scientific and reasonable, simple in process and convenient to popularize, can accelerate the splitting of boiler coking by adding magnesium nitrate, magnesium-based nitrate and boric acid in use, so that the coking on the boiler can fall off, can effectively remove the coking of the boiler in use, can effectively and fully burn generated toxic substances by using a combustion improver and a catalyst, reduces the generation of the toxic substances, and throws the boiler anti-coking agent into the boiler by using a coal thrower.

Drawings

FIG. 1 is an XRD pattern of samples X1, X2 and X3 of the present invention after incubation at 1300 ℃ for 3 h;

FIG. 2 is an XRD pattern of sample X2 after incubation for 3h at different temperatures in accordance with the present invention;

FIG. 3 is an SEM photograph of the fracture of sample X2 after being burned at different temperatures in the present invention;

FIG. 4 is a graph showing the bulk density, apparent porosity and linear shrinkage of sample X2 after firing at different temperatures in accordance with the present invention;

FIG. 5 shows the strength of sample X2 after different temperature treatments and the shear strength of the bonded sample in accordance with the present invention.

Detailed Description

The invention is illustrated below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.