Low temperature Claus sulfur recovery process and device therefor

Abstract

The invention discloses a low temperature Claus sulfur recovery process. The process mainly comprises a thermal reaction section, a catalytic reaction section and a tail gas incineration section, wherThe invention discloses a low temperature Claus sulfur recovery process. The process mainly comprises a thermal reaction section, a catalytic reaction section and a tail gas incineration section, whertion temperature, contributes to performance of chemical equilibrium towards the direction of sulfur generation, so that conversion rate and recovery rate of sulfur are improved. Moreover, the processtion temperature, contributes to performance of chemical equilibrium towards the direction of sulfur generation, so that conversion rate and recovery rate of sulfur are improved. Moreover, the process has the advantages of simple process flow, relative small equipment and investment, low operation cost and more contribution to environmental protection. The invention also discloses a device for thehas the advantages of simple process flow, relative small equipment and investment, low operation cost and more contribution to environmental protection. The invention also discloses a device for the low temperature Claus sulfur recovery process.low temperature Claus sulfur recovery process.ein in a combustion furnace of the thermal reaction section, partial hydrogen sulfide reacts with oxygen to be converted into sulfur dioxide, the hydrogen sulfide and the sulfur dioxide undergo a Clauein in a combustion furnace of the thermal reaction section, partial hydrogen sulfide reacts with oxygen to be converted into sulfur dioxide, the hydrogen sulfide and the sulfur dioxide undergo a Claus reaction to generate sulfur, and process gas after sulfur separation enters the catalytic reaction section; in the reactor of each stage of the catalytic reaction section, the hydrogen sulfide and ts reaction to generate sulfur, and process gas after sulfur separation enters the catalytic reaction section; in the reactor of each stage of the catalytic reaction section, the hydrogen sulfide and the sulfur dioxide under conventional Claus reaction, catalyst reactivation, sub-dewpoint and sub-solid point low temperature Claus reaction in sequence; after the catalyst reaction section, the tail ghe sulfur dioxide under conventional Claus reaction, catalyst reactivation, sub-dewpoint and sub-solid point low temperature Claus reaction in sequence; after the catalyst reaction section, the tail gas which is subjected to sulfur separation enters the tail gas incineration section, and the tail gas is incinerated and exhausted in the tail gas incineration furnace. The process adopts a lower reacas which is subjected to sulfur separation enters the tail gas incineration section, and the tail gas is incinerated and exhausted in the tail gas incineration furnace. The process adopts a lower reac

Description

technical field [0001] The invention relates to the technical field of sulfur recovery technology, in particular to a process and a device for recovering sulfur from natural gas purification treatment, oil refining, coal chemical industry, etc. by adopting the low-temperature Claus method. Background technique [0002] At present, the technologies for recovering sulfur from acid gas containing hydrogen sulfide include: conventional Claus process, Claus extension process, conventional Claus + reduction and absorption tail gas treatment process. Their basic technological process and disadvantages are introduced as follows: [0003] 1. Conventional Claus process: [0004] Produced in 1890, industrialized in 1938. Its main reactions are: [0005] (1) Thermal reaction section (conducted in a combustion furnace): [0006] h 2 S+1.5O 2 = SO 2 +H 2 O+518.9kJ / mol (2-1) [0007] h 2 S+0.5SO 2 =0.75S 2 +H 2 O-4.75kJ / mol (2-2) [0008] The heat emitted by the reaction of f...

AI Technical Summary

Problems solved by technology

[0012] The disadvantages of the conventional Claus process are: because the Claus reaction is limited by factors such as thermodynamic balance and kinetic balance, the sulfur recovery rate of the conventional Claus device can only reach 94% to 97%. SO 2 Large emission, high concentration, and great environmental pollution

Due to the high reaction temperature, the sulfur conversion rate of Superclaus 99 is low, and the environmental protection pressure is high; the process of Superclaus 99.5 is complicated and the investment is large

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