Compound fusion inhibitor capable of increasing fusion temperature of coal ash with low ash fusion point

A technology of melting temperature and ash melting point, applied in fuel additives, petroleum industry, solid fuel, etc., to achieve the effect of increasing ash melting point, reducing cost and improving gasification efficiency

Inactive Publication Date: 2018-05-11
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The methods to increase the melting point of coal ash include adding a melting inhibitor and adding coal with a high ash melting point. The commonly us

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Taking Fujian Yongding coal as the experimental object, an experiment was carried out on increasing the melting temperature of Yongding coal ash according to the present invention. The melting temperature of Yongding coal ash measured according to GB / T219-2008 is 1221°C. After adding 12wt% alumina anti-melting agent separately and mixing, the ash melting point temperature measured according to GB / T219-2008 is 1244°C. After adding 1wt% calcium oxide and mixing, the ash melting point temperature measured according to GB / T219-2008 is 1213°C, adding 13wt% composite anti-melting agent (12 parts of alumina, 1 part of calcium oxide) The ash melting point temperature measured in 2008 was 1254°C.

Embodiment 2

[0020] Taking Fujian Longyan coal as the experimental object, an experiment was carried out to increase the melting temperature of Yongding coal ash according to the present invention. The melting temperature of Longyan coal ash measured according to GB / T219-2008 is 1193°C. After adding 14wt% alumina anti-melting agent separately and mixing, the ash melting point temperature measured according to GB / T219-2008 is 1238°C. After adding 2wt% calcium oxide and mixing, the ash melting point temperature measured according to GB / T219-2008 is 1185°C, adding 16wt% composite anti-melting agent (14 parts of alumina, 2 parts of calcium oxide) The ash melting point temperature measured in 2008 was 1251°C.

Embodiment 3

[0022] Taking Fujian Shangjing coal as the experimental object, an experiment was carried out to increase the melting temperature of Yongding coal ash according to the present invention. The ash melting temperature of Shangjing coal ash measured according to GB / T219-2008 is 1228°C. After adding 12wt% alumina anti-melting agent separately and mixing, the ash melting point temperature measured according to GB / T219-2008 is 1246°C. After adding 2wt% calcium oxide alone and mixing, the ash melting point temperature measured according to GB / T219-2008 is 1211°C, after adding 14wt% composite anti-melting agent (12 parts of alumina, 2 parts of calcium oxide) and mixing, according to GB / T219 The ash melting point temperature measured in -2008 was 1252°C.

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Abstract

The invention discloses a compound fusion inhibitor capable of increasing fusion temperature of coal ash with a low ash fusion point and belongs to the technical field of coal gasification improvement. The compound fusion inhibitor comprises raw materials in parts by weight as follows: 1-30 parts of calcium-based flux and 1-30 parts of aluminium oxide. The calcium-based flux is doped into the fusion inhibitor aluminium oxide, so that the fusion point of the coal ash can be increased effectively, coal with low ash fusion point can meet gasification requirements, viscosity-temperature characteristics can be improved, gasification efficiency is increased, cost can be reduced, and the coal with low ash fusion point can be applied better.

Description

technical field [0001] The invention relates to a composite anti-melting agent for improving the melting temperature of coal ash with a low ash melting point, and belongs to the technical field of coal gasification improvement. Background technique [0002] The chemical composition of coal ash is often expressed in the form of various oxides, generally including: SiO 2 , Al 2 o 3 , Fe 2 o 3 , CaO, MgO, TiO 2 , Na 2 O, K 2 O, P 2 o 5 , SO 3 Wait. According to its own properties, it can be divided into acidic oxides (SiO 2 , Al 2 o 3 ,TiO 2 ) and basic oxides (Fe 2 o 3 , CaO, MgO, Na 2 O, K 2 O) Two types, it is generally believed that the more acidic oxide content, the higher the ash melting temperature, and the higher the basic oxide content, the lower ash melting temperature. [0003] The melting temperature of coal ash is an important indicator of coal conversion (combustion or gasification). The ash melting temperature is closely related to the choice ...

Claims

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Application Information

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IPC IPC(8): C10L9/10C10L10/00
CPCC10L9/10C10L10/00
Inventor 林荣英张柏茂林晨昊李媛媛
Owner FUZHOU UNIV
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