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Method for improving biomass ash fusion point

A biomass ash, ash melting point technology, applied in the petroleum industry, solid fuels, fuel additives, etc., can solve the problems of difficult to remove large slag, damage to the air permeability inside the bed, sintering, etc., to achieve easy promotion, low cost, low cost effect

Inactive Publication Date: 2011-05-04
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the process of biomass combustion and gasification utilization, there will be two main problems due to ash fusion: ① At high temperature, the ash will become molten and form slag, which will be stuck on the inner wall of the gasifier and combustion furnace or stick to it. Form large slag blocks that are difficult to remove; ②For biomass fixed bed combustion and gasification technology, the temperature in the furnace should not be too high. Immediately block the gas path and produce no gas
However, measures to increase the ash melting point of biomass have not been reported, and it is necessary to carry out research in this area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 In this example, according to the present invention, a test is carried out to improve the ash melting point of wheat straw. Before the addition of compound additives, the ash melting point Ts of wheat straw measured according to GB / T219-1996 is 970°C. After mixing wheat straw with compound additives (5 parts of kaolin, 8 parts of diatomite, 14 parts of acid clay and 6 parts of bentonite), the ash melting point Ts measured according to GB / T219-1996 is 1252 °C.

Embodiment 2

[0025] Embodiment 2 In this embodiment, the ash melting point of rice straw has been improved according to the present invention. Before adding compound additives, the ash melting point Ts of rice straw measured according to GB / T219-1996 is 1030°C. After rice straw is mixed with compound additives (12 parts of kaolin, 7 parts of diatomite, 14 parts of acid clay and 18 parts of Shenhua bituminous coal), the ash melting point Ts measured according to GB / T219-1996 is 1245°C.

Embodiment 3

[0026] Example 3 In this example, according to the present invention, a test is carried out to increase the ash melting point of wood chips. Before the addition of compound additives, the ash melting point Ts of wood chips measured according to GB / T219-1996 is 1120°C. After wood chips are mixed with composite additives (9 parts of kaolin, 15 parts of coal gangue and 5 parts of Huainan coal), the ash melting point Ts measured according to GB / T219-1996 is 1350°C.

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Abstract

The invention discloses a method for improving biomass fuel ash fusion point, which is characterized in that the aim of improving the ash fusion point of biomass fuel is realized by mixing the compounding additives with the biomass fuel. By taking the mass of ash in the biomass fuel as 100 parts, the compounding additives contain the following components in parts by weight: 5-20 parts of kaolin, 0-15 parts of acid clay, 0-15 parts of diatomite, 0-10 parts of bentonite, 0-20 parts of coal, and 0-25 parts of coal gangue. The biomass fuel and the compounding additives are crashed, and are mixed uniformly by adopting a direct mixing method, The ash fusing point Ts (softening temperature) of the biomass fuel can be improved greatly, the range improved can reach 200-300 DEG C. The method has the characteristics of simple operation and low cost, and can be widely used for improving the ash fusing point of various biomass fuels.

Description

technical field [0001] The invention relates to a method for increasing the melting point of biomass ash, which belongs to the technical field of biomass gasification or combustion improvement. Background technique [0002] From a chemical point of view, biomass is mainly composed of compounds containing C, H and O, which are of the same type as conventional mineral energy such as petroleum and coal (coal and petroleum are both derived from biomass after long-term conversion), so Its characteristics and utilization methods are very similar to those of fossil fuels, and can be developed and utilized by making full use of conventional energy technologies that have been developed. [0003] Thermochemical conversion is one of the main utilization technologies of biomass. The ash melting characteristics of biomass play a decisive role in the thermochemical conversion process. The ash melting point not only affects the energy consumption of melting, but also determines the diffic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10C10L10/00
Inventor 吴诗勇彭文才吴幼青高晋生
Owner EAST CHINA UNIV OF SCI & TECH
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