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Method for lighting the burners in a reforming furnace

A burner and reformer technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as difficult temperature measurement and heat not being consumed

Inactive Publication Date: 2013-07-24
LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is both a risk of excess heat being supplied to certain areas of the furnace and a risk of heat not being consumed
In addition, there are difficulties in performing temperature measurements, which are necessary for the protection tube

Method used

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  • Method for lighting the burners in a reforming furnace
  • Method for lighting the burners in a reforming furnace
  • Method for lighting the burners in a reforming furnace

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0037] figure 1 A cross-fired reformer is shown comprising a reformer tube 1 placed in the middle between two refractory walls 2 and 3 . The refractory walls 2 and 3 are equipped with burners 4 arranged in columns and rows. The rows of burners are denoted R1 to R5 from bottom to top.

[0038] The prior art start-up approach proposes to ignite one of the two burners in each row, starting from the bottommost row of the furnace (R2 or even R1 ) and then continuing with the other rows. This choice was decided especially for ease of implementation - it is easier to ignite the rows of burners sequentially starting from the bottom of the furnace.

[0039] Some start-up practices also suggest igniting burners in two adjacent rows (R4 and R5) at the top of the furnace during a hot start.

[0040] Ignition of the burners in the lower row (R1 or R2), in particular due to the slow heating of the convective zone, can lead to several types of problems, namely:

[0041] - local overheati...

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Abstract

The invention relates to a method for igniting the burners of a furnace for the steam reforming of hydrocarbons during the start-up of the furnace, wherein said burners are arranged on two walls facing each other, aligned vertically in columns and are aligned horizontally in n rows Ri (i varies from 1 to n and i increases from bottom to top of the furnace). According to the method of the invention, the burners are ignited in a firing order comprising successive steps, all burners ignited during a step being in the same row Ri, and the order of igniting these rows is chosen such that the Heating uniformity is improved.

Description

technical field [0001] The invention relates to a method for igniting burners of hydrocarbon steam reformers (reformage à la vapeur d'hydrocarbures). Background technique [0002] The hydrocarbon steam reforming process, widely known as the SMR (steam methane reforming) process, produces a mixture called synthesis gas mainly comprising H2 and CO. These processes are based on so-called conversion reactions, which are strongly endothermic catalytic reactions at high temperatures (800°C-950°C). For this purpose, hydrocarbons and steam are introduced into catalyst-filled reformer tubes, which are placed inside the reformer. Syngas is obtained at the outlet of this tube. [0003] The furnace comprises one or more combustion chambers made of refractory walls and burners placed on these walls. These burners are designed so that the heat of combustion of the burner is transferred to the hydrocarbon / steam mixture through the tube walls mainly by radiating the heat of the flame ont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/38
CPCC01B3/384C01B2203/0233C01B2203/1604
Inventor L-M·孙J·考博特J·加勒达
Owner LAIR LIQUIDE SA POUR LETUDE & LEXPLOITATION DES PROCEDES GEORGES CLAUDE