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Method of pre-heating fuel and comburent for oxy-burners, using combustion air pre-heating installations

An oxygen-enriched oxidant and burner technology, which is used in combustion methods, combustion equipment, lighting and heating equipment, etc.

Active Publication Date: 2008-08-27
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for economical reasons it is difficult to use only oxy-fuel combustion in a regenerative kiln initially set up for air firing
One of the reasons for this is that the regenerator had to be removed, the kiln was resized and the combustion exhaust gas discharge had to be reconfigured

Method used

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  • Method of pre-heating fuel and comburent for oxy-burners, using combustion air pre-heating installations
  • Method of pre-heating fuel and comburent for oxy-burners, using combustion air pre-heating installations
  • Method of pre-heating fuel and comburent for oxy-burners, using combustion air pre-heating installations

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Embodiment Construction

[0023] Figure 1 illustrates the method of the invention. Kiln 9 is installed with:

[0024] - upstream, with an oxy-fuel burner fed with fuel 4 and oxy-enriched oxidizer 3;

[0025] - Downstream, there is a burner fed with fuel 6 and heated air 51;

[0026] - Regenerator 1 , which is fed with hot exhaust gas 2 from the kiln (regenerator 1 ) or returns hot air 5 , 51 (regenerator 11 ). The hot air 5 conveyed by the heat accumulator 11 is either used as combustion air 51 in the air burner or for preheating the fuel 4 and the oxygen-enriched oxidizer 3 of the oxy-fuel burner via the heat exchangers 6 , 7 . In this configuration, the hot air 5 from the regenerator 11 arranged on the same side as the kiln 9 only enables the air-fuel burner and the oxy-fuel burner located on the same side of the kiln to be fed and preheated respectively, The burners located on the other side of the kiln are not operating.

[0027] Figure 2 shows the preheating of the reactants: hot air 5 from th...

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Abstract

The present invention relates to a combustion method which is performed in a furnace that is equipped with energy recovery means and burners, whereby the heat from the combustion fumes is recovered by energy recovery means and said recovered heat is used in order to heat the air. According to the invention, at least part of the burners performs the combustion of an oxygen-rich comburent and a fuel and at least part of the air heated by the energy recovery means is used to heat the oxygen-rich comburent and / or fuel for the burners.

Description

technical field [0001] The invention relates to a plant for the oxyfuel method, in which oxygen and / or fuel is preheated in a kiln equipped with means for air combustion with air preheating. Background technique [0002] A regenerative furnace is a furnace equipped with a large amount of refractory material on its side walls. The refractory material is a heat exchanger capable of recovering heat from the combustion exhaust gases leaving the side walls of the kiln and transferring this heat to the cold air fed to the kiln. The refractory material of the regenerator is heated to very high temperatures (in the order of 1300-1500°C) by the combustion exhaust gases. In practice, the combustion exhaust gases exiting through the side walls of the kiln come into contact with the refractory material from its upper part to its lower part during a period typically of about 20 minutes. During the subsequent cycle, the cool combustion air to be supplied to the burners of the kiln comes...

Claims

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Application Information

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IPC IPC(8): F23L15/00F23L7/00C03B5/235
CPCY02E20/344F23L15/00G01N25/18C03B5/2353F23L7/007Y02E20/34Y02P40/50
Inventor L·雅里B·勒鲁
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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