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Biomass boiler anticorrosive agent, and preparation and application thereof

A technology for biomass boilers and anti-corrosion agents, applied in fuel additives, petroleum industry, solid fuels, etc., can solve the problems of reduced anti-corrosion performance, accelerated corrosion, and enhanced oxidation of pipes, so as to reduce alkali metal corrosion and chlorine corrosion, structure The effect of stability and high mechanical strength

Active Publication Date: 2013-11-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for biomass fuels with high Cl content, Cl will accelerate corrosion, lead to enhanced oxidation, metal loss, and the formation of a large number of holes and loose oxide layers on the surface of the heating surface, thus greatly reducing the corrosion resistance of the pipe.

Method used

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  • Biomass boiler anticorrosive agent, and preparation and application thereof
  • Biomass boiler anticorrosive agent, and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A kind of anticorrosion agent for biomass boiler, which is composed of coal ash, Al 2 (SO4) 3 , kaolin and CaSO 4 Composition, the mass of each component in the anti-corrosion agent is: 4kg coal ash (particle size 0.05-0.015mm), 2kg Al 2 (SO4) 3 , 3kg kaolin, 1kg CaSO 4 .

[0020] Above-mentioned biomass boiler corrosion inhibitor, its preparation method is as follows:

[0021] Step (1): Calcining 4kg of coal ash with a particle size of 0.05-0.15mm in a muffle furnace at 1000°C for 1 hour;

[0022] Step (2): Add 2kgAl 2 (SO4) 3 , 3kg kaolin, and 1kg CaSO 4 Grind to 0.05-0.1mm respectively, and add calcined coal ash for stirring, and after stirring evenly, press to form particles with rough threads on the outer surface.

[0023] Step (3): Bake the anticorrosion agent particles in a muffle furnace at 200°C for 0.5h to prepare the anticorrosion agent for biomass boilers. (of which coal ash, Al 2 (SO4) 3 , kaolin and CaSO 4 The mass percentage content is respec...

Embodiment 2

[0027] A kind of biomass boiler anticorrosion agent, this anticorrosion agent is made of coal ash, Al 2 (SO4) 3 , kaolin and CaSO 4 Composition, the mass of each component in the anti-corrosion agent is: 3kg coal ash (particle size 0.05-0.015mm), 1.5kgAl 2 (SO4) 3 , 4kg kaolin, 1.5kg CaSO 4 .

[0028] Above-mentioned biomass boiler corrosion inhibitor, its preparation method is as follows:

[0029] Step (1): Calcining 3kg of coal ash with a particle size of 0.05-0.15mm in a muffle furnace at 1050°C for 1.5h;

[0030] Step (2): Add 1.5kgAl 2 (SO4) 3 , 4kg kaolin, and 1.5kg CaSO 4 Grind to 0.05-0.1mm respectively, and add calcined coal ash for stirring, and after stirring evenly, press to form particles with rough threads on the outer surface.

[0031] Step (3): Bake the anticorrosion agent particles in a muffle furnace at 150° C. for 1 hour to prepare the anticorrosion agent for biomass boilers. (of which coal ash, Al 2 (SO4) 3 , kaolin and CaSO 4 The mass percenta...

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Abstract

The invention discloses a biomass boiler anticorrosive agent, and preparation and application thereof, belonging to the technical field of biomass combustion or boiler heating surface corrosion. The anticorrosive agent is composed of the following components in percentage by mass: 30-60% of coal ash, 10-30% of Al2(SO4)3, 20-50% of kaolin and 10-20% of CaSO4. The anticorrosive agent is granules with coarse threads on the external surface, the granular mass is 0.5-3g and is moderate, and thus, anticorrosive agent can not be blown away from the hearth by flue gas, so that the soot formation risk and soot blowing cost of the boiler heating surface can not be increased; the invention has the characteristics of stable structure, high mechanical strength, large specific area and the like; the thread appearance can increase the reaction area of the anticorrosive agent with the base metal compound and chloride, and can fix K, Na and other alkali metals and Cl into the furnace slag, thereby reducing the alkali metal corrosion and chlorine corrosion of the heating surface.

Description

technical field [0001] The invention belongs to the technical field of biomass combustion or boiler heating surface corrosion, and in particular relates to a biomass boiler anticorrosion agent and its preparation and application. Background technique [0002] With the depletion of fossil fuels and increasingly serious environmental problems, the development and utilization of biomass energy has attracted great attention from all over the world. Biomass energy has a wide range of sources, low pollution, renewable and CO 2 Advantages such as zero emission. At present, direct combustion of biomass for heating and power generation is an important way to utilize biomass energy. Due to the high content of K, Na and other alkali metals and Cl elements in biomass fuel, the heating surface of the boiler is severely corroded, which has become an important issue affecting biomass. Power plant economy and one of the main reasons that threaten the long-term safe and stable operation of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/04C10L9/10
Inventor 李季谭巍杨勇平宋景慧
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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