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Biomass boiler anti-coking agent with porous membrane structure and preparation method thereof

A technology of biomass boiler and anti-coking agent, which is applied in the direction of fuel additives, petroleum industry, solid fuel, etc. It can solve the problems of low utilization rate of combustion equipment, easy ash accumulation, easy slagging of biomass fuel, etc., and realize recycling , large porosity, suitable for large-scale application

Active Publication Date: 2013-12-11
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the objectives of the present invention is to provide a porous membrane structure biomass boiler anti-coking agent, the anti-coking agent has high reaction efficiency, large specific surface area, high porosity, good thermal stability, high mechanical strength, stable structure and no deformation, It can solve the problems of easy slagging, easy ash accumulation and low utilization rate of combustion equipment in the combustion process of biomass fuel

Method used

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  • Biomass boiler anti-coking agent with porous membrane structure and preparation method thereof
  • Biomass boiler anti-coking agent with porous membrane structure and preparation method thereof
  • Biomass boiler anti-coking agent with porous membrane structure and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A kind of porous film structure biomass boiler anti-coking agent, this anti-coking agent is made of MgO, kaolin, active Al 2 o 3 Composed of foaming agent, the foaming agent is charcoal, MgO, kaolin and active Al 2 o 3 MgO-kaolin-active Al with MgO as anti-coking agent 2 o 3 The mass of the matrix and the components in the anti-coking agent are: 10.0g kaolin, 4.0g active Al 2 o 3 , 6.0g MgO and 20.0g charcoal.

[0020] The above-mentioned porous film structure biomass boiler anti-coking agent, its preparation method is as follows:

[0021] Step (1): 10.0g kaolin, 4.0g active Al 2 o 3 and 6.0g of MgO are ground to 0.06-0.09mm respectively, add 20.0g of charcoal with a particle size of 0.1-0.2mm, and use a semi-dry method on a press under the condition of a molding pressure of 38MPa to press it into a circular piece of φ10×5mm ;

[0022] Step (2): calcining the pressed circular tablet in a muffle furnace at 1100° C. for 4 hours;

[0023] Step (3): Grinding the ...

Embodiment 2

[0028] A kind of porous film structure biomass boiler anti-coking agent, this anti-coking agent is made of MgO, kaolin, active Al 2 o 3 Composed of foaming agent, the foaming agent is charcoal, MgO, kaolin and active Al 2 o 3 MgO-kaolin-active Al with MgO as anti-coking agent 2 o 3 The mass of the matrix and the components in the anti-coking agent are: 13.0g kaolin, 3.0g active Al 2 o 3 4.0g, MgO and 8.6g charcoal.

[0029] The above-mentioned porous film structure biomass boiler anti-coking agent, its preparation method is as follows:

[0030] Step (1): 13.0g kaolin, 3.0g active Al 2 o 3 and 4.0g MgO are ground to 0.06-0.09mm respectively, add 8.6g of charcoal with a particle size of 0.1-0.2mm, and use a semi-dry method on a press under the condition of a molding pressure of 39MPa to press it into a circular piece of φ10×5mm ;

[0031] Step (2): calcining the pressed circular tablet in a muffle furnace at 1150° C. for 3 hours;

[0032] Step (3): Grinding the calcin...

Embodiment 3

[0037] A kind of porous film structure biomass boiler anti-coking agent, this anti-coking agent is made of MgO, kaolin, active Al 2 o 3 Composed of foaming agent, the foaming agent is charcoal, MgO, kaolin and active Al 2 o 3 MgO-kaolin-active Al with MgO as anti-coking agent 2 o 3The mass of the matrix and the components in the anti-coking agent are: 5.0g kaolin, 3.0g active Al 2 o 3 , 12.0g MgO and 5.0g charcoal.

[0038] The above-mentioned porous film structure biomass boiler anti-coking agent, its preparation method is as follows:

[0039] Step (1): 5.0g kaolin, 3.0g active Al 2 o 3 and 12.0g of MgO are ground to 0.06-0.09mm respectively, add 5.0g of charcoal with a particle size of 0.1-0.2mm, and use a semi-dry method on a press under the condition of a molding pressure of 39MPa to press it into a circular piece of φ10×5mm ;

[0040] Step (2): calcining the pressed round tablet in a muffle furnace at 1200°C for 2.5 hours;

[0041] Step (3): Grinding the calcin...

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Abstract

The invention discloses a biomass boiler anti-coking agent with a porous membrane structure and a preparation method thereof. The anti-coking agent consists of magnesium oxide (MgO), kaolin, active aluminum oxide (Al2O3) and a foaming agent. The MgO, the kaolin and active Al2O3MgO form an MgO-kaolin-active Al2O3MgO matrix of the anti-coking agent, wherein percentage mass contents of the MgO, the kaolin and the active Al2O3 in the MgO-kaolin-active Al2O3MgO matrix are respectively 20%-60%, 25%-65% and 15%-30%. The percentage mass content of the foaming agent in the whole anti-coking agent is 20%-50%. The biomass anti-coking agent with the porous membrane structure is high in mechanical strength, stable in structure and large in poriness and specific surface area, and the reaction area between the anti-coking agent and alkali metal in biomass is increased. Micro-pores on the surface of the anti-coking agent have adsorption performance, alkali metal such as K and Na can be effectively adsorbed onto the surface of the anti-coking agent, high-melting-point matter is generated, and generation of slag of heat-transfer surface is reduced. The invention further provides the preparation method of the anti-coking agent.

Description

technical field [0001] The invention belongs to the technical field of biomass gasification or combustion, and specifically refers to an anti-coking agent for a biomass boiler with a porous membrane structure and a preparation method thereof. Background technique [0002] Compared with fossil fuels, biomass fuel has a higher content of inorganic elements such as alkali metal K, Na and non-metallic element Cl and other special properties, such as active properties, resulting in a low ash melting point of biomass, so that it can be used in the combustion and gasification process of biomass boilers. , resulting in a series of problems such as ash accumulation and slagging in biomass boilers, which greatly threaten the safety, economy and availability of boiler operation. [0003] Adding additives to biomass fuels to inhibit the formation of ash and slagging is a simple and feasible method. Its principle: First, the chemical reaction between the additive and the alkali metal va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10C10L10/00C10L10/04
Inventor 宋景慧张芸胡笑颖董长青
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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