Compound additive for inhibiting alkali metals from being transferred to gaseous phase in biomass combustion process and preparation method and application

A composite additive and combustion process technology, applied in the fuel, solid fuel, petroleum industry and other directions, can solve the problems of coking and slagging, low thermal efficiency, etc., and achieve the effect of increasing the ash melting point, reducing investment costs, and improving thermal efficiency and stability.

Inactive Publication Date: 2015-04-01
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] The object of the present invention is to provide a composite additive that inhibits the migration of alkali metals to the gas ph...

Method used

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  • Compound additive for inhibiting alkali metals from being transferred to gaseous phase in biomass combustion process and preparation method and application
  • Compound additive for inhibiting alkali metals from being transferred to gaseous phase in biomass combustion process and preparation method and application

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Embodiment 1

[0026] The composite additive provided in this embodiment for inhibiting the migration of alkali metals to the gas phase during biomass combustion is made of active ingredients and auxiliary materials, and the active ingredient is Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 , The auxiliary materials are binder and water, among which binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 The ratio of mass parts is 10:10:55:25, and the amount of water is binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 15% of the total mass.

[0027] The preparation method of the composite additive for inhibiting the migration of alkali metals to the gas phase during the combustion of biomass is as follows:

[0028] (1) According to the binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 The ratio of the mass parts is 10:10:55:25, weigh the binder and Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 , Wherein the binder is composed of starch and dextrin, and the mass ratio of starch and dextrin is 60:40. Mix them evenly in a drying container...

Embodiment 2

[0034] The composite additive provided in this embodiment for inhibiting the migration of alkali metals to the gas phase during biomass combustion is made of active ingredients and auxiliary materials, and the active ingredient is Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 , The auxiliary materials are binder and water, among which binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 The ratio of mass parts is 5:15:50:30, and the amount of water is binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 30% of the total mass.

[0035] The preparation method of the composite additive for inhibiting the migration of alkali metals to the gas phase during the combustion of biomass is as follows:

[0036] (1) According to the binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 The ratio of mass parts is 5:15:50:30, wherein the binder is composed of starch and dextrin, the mass ratio of starch and dextrin is 70:30, and the mixture is uniformly mixed in the drying container to obtain the mixture a;

[0037] (2) The partic...

Embodiment 3

[0042] The composite additive provided in this embodiment for inhibiting the migration of alkali metals to the gas phase during biomass combustion is made of active ingredients and auxiliary materials, and the active ingredient is Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 , The auxiliary materials are binder and water, among which binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 The ratio of mass parts is 20:20:40:20, and the amount of water is binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 20% of the total mass.

[0043] The preparation method of the composite additive for inhibiting the migration of alkali metals to the gas phase during the combustion of biomass is as follows:

[0044] (1) According to the binder, Al 2 O 3 , Kaolin and (NH 4 ) 2 SO 4 The ratio of mass parts is 20:20:40:20, and the binder is composed of starch and dextrin, and the mass ratio of starch and dextrin is 80:20. Mix them evenly in a drying container to obtain a mixture a;

[0045] (2) The particle size of the mixtur...

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Abstract

The invention discloses a compound additive for inhibiting alkali metals from being transferred to a gaseous phase in a biomass combustion process. The compound additive is prepared from active components and auxiliary materials, wherein the active components are Al2O3, kaolin and (NH4)2SO4 in a weight ratio of (10-25): (40-60): (20-35). The compound additive disclosed by the invention can be used for inhibiting alkali metals from being transferred to the gaseous phase in the biomass combustion process and preventing the alkali metals from generating low-melting-point co-melts and eutectic in a molten condition in the combustion process, so that the problems that coking and slagging in the existing biomass boiler happen and the heat efficiency is low and the like are solved. The invention further discloses a preparation method of the compound additive. The preparation method is concise and low in cost. The invention also discloses an application of the additive in the biomass combustion process. The compound additive applied to biomass combustion is small in addition and low in investment cost.

Description

technical field [0001] The invention belongs to the technical field of biomass combustion, and in particular relates to an additive which is suitable for boilers using biomass as fuel and inhibits the migration of alkali metals to the gas phase during the biomass combustion process, as well as its preparation method and application. Background technique [0002] Biomass is the fourth energy source after coal, oil, and natural gas, and its contribution accounts for 14% of the world's primary energy consumption. Biomass energy has the characteristics of nearly zero carbon dioxide emissions. The issue of tight energy supply and the reduction of greenhouse gas emissions are of great significance. Biomass accounts for about 20% of my country's total energy consumption, and the total amount of biomass resources is equivalent to 200-400 million tons of standard coal per year, which has great potential for development and is sufficient to supplement my country's energy gap. [0003...

Claims

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Application Information

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IPC IPC(8): C10L9/10
Inventor 张宏亮赵莹苏伟林木松陈刚程桂石董长青李薇黄奎
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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