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Equipment and reactor for direct synthesis of hydrochloric acid from hydrogen and chlorine using recovered heat

A reactor and alloy technology, applied in the chemical industry, can solve problems such as fracture, mechanical stress, and condensation

Inactive Publication Date: 2017-02-15
MERSEN FRANCE PY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flanges are often at risk of creating cold spots and therefore of condensation and thus of corrosion due to localized formation of liquid hydrochloric acid
Horizontal flanges end up with the risk of mechanical stress, especially in the presence of thermal cycling, which can lead to fracture

Method used

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  • Equipment and reactor for direct synthesis of hydrochloric acid from hydrogen and chlorine using recovered heat
  • Equipment and reactor for direct synthesis of hydrochloric acid from hydrogen and chlorine using recovered heat
  • Equipment and reactor for direct synthesis of hydrochloric acid from hydrogen and chlorine using recovered heat

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Embodiment Construction

[0053] See figure 1 The equipment according to the present invention includes a vertical reactor 1, which is generally cylindrical and closed at both ends (except for gas supply and reaction gas discharge, other positions are closed) The reactor 1 includes a bottom 7 called a furnace and a top 8 called an inverter. The bottom of the furnace 7 includes a combustion chamber 48 (only in figure 2 Shown in), the bottom of the combustion chamber 48 includes the burner 2. The burner 2 includes a chlorine inlet and a hydrogen inlet; and a flame 3 is formed at the top of the burner 2, and the flame burns chlorine and hydrogen to form gaseous HCl. The gas is discharged from the reactor 1 through the outlet pipe 12 near the top of the reactor 1 and passes to the absorber 4, which is installed beside the reactor 1. In the absorber 4, gaseous HCl is absorbed in water or a dilute aqueous solution of HCl. In this way, a substantially concentrated aqueous HCl solution is formed, which is r...

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PUM

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Abstract

The invention relates to a reactor (1) for the synthesis of HCl from chlorine and hydrogen comprising a bottom called a furnace (7) comprising a a burner (2) which is supplied with chlorine and hydrogen to form gaseous HCl, said converter (8) arranged coaxially above said furnace (7), and said converter (8) includes a plurality of tubes (31) in contact with the heat transfer fluid. Reactive gases in the furnace (7) pass through the tubes (31) and the heat transfer fluid flows in the spaces between the tubes (31). Between the furnace ( 7 ) and the converter ( 8 ) is arranged a perforated tube plate ( 38 ) on which the tubes ( 31 ) of the converter ( 8 ) are connected. The reactor (1) is characterized in that: all inner walls of the reactor (1) that are in contact with gaseous HCl are made of metal alloys, and in the furnace (7), the walls that are in contact with gaseous HCl At least a portion of the inner surface of the wall is made of an alloy comprising at least 20% by weight of nickel.

Description

Technical field [0001] The present invention relates to the field of chemical engineering, and more specifically, to equipment and reactors for directly synthesizing gaseous hydrochloric acid through the direct reaction between hydrogen and chlorine, which enables the recovery of pressure from the reaction in the form of pressurized saturated steam At least part of the heat. Background technique [0002] One way to synthesize hydrochloric acid industrially is to directly react hydrogen and chlorine in the gas phase: [0003] H 2 (g)+Cl 2 (g)→2HCl(g). [0004] The reaction is highly exothermic (approximately 92 kJ / mole HCl is produced) and produces a flame temperature of approximately 2500°C to 3000°C. Therefore, the reactor must be cooled continuously, usually by a fluid such as water or steam. The cooling water consumed by this unit for direct synthesis of hydrochloric acid is considerable. [0005] Generally, this method involves two steps: [0006] (I) The formation of gaseous HC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B7/01B01J19/02
CPCB01J19/02B01J2219/00081B01J2219/00094B01J2219/00157B01J2219/00159B01J2219/0236C01B7/012C22C19/00C22C19/05C22C19/051C22C19/055C22C19/056C22C19/057C22C19/058C22C38/06C22C38/50C23C30/00F28D7/0041F28D7/0066F28D7/16Y02P20/10B01J12/005
Inventor 热雷米·伯努瓦热罗姆·梅拉德
Owner MERSEN FRANCE PY