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Low temperature Claus sulfur recovery process and device therefor

A sulfur recovery and Claus reaction technology, which is applied in chemical recovery, sulfur preparation/purification, energy input, etc., can solve the problems of high environmental protection pressure, large environmental pollution, complex process, etc., and achieve high conversion rate effect

Inactive Publication Date: 2009-09-02
CHENGDU SEPMEM SCI & TECH
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  • Description
  • Claims
  • Application Information

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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 emissio

Method used

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  • Low temperature Claus sulfur recovery process and device therefor

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Embodiment 1

[0086] The process flow of the low temperature Claus sulfur recovery process and the devices used in this embodiment are as follows: figure 1 Shown:

[0087] The device includes a thermal reaction section device, a catalytic reaction section device and a tail gas incineration section device; wherein:

[0088] The device in the thermal reaction section sequentially includes a combustion furnace 1, a waste heat boiler 2 and a primary sulfur condenser 3, which are connected to each other through pipelines; the outlet end of the primary sulfur condenser 3 is connected to the primary preheater 4 of the catalytic reaction section device through a pipeline The ingress port connection;

[0089] The device in the catalytic reaction section includes a fixed device and a switchable device, wherein the fixed device sequentially includes a primary preheater 4, a primary reactor 5, a secondary preheater 6, and a secondary sulfur condenser 7; the switchable device includes a secondary Reac...

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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, wherein 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 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 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 reaction 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 the low temperature Claus sulfur recovery process.

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...

Claims

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Application Information

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IPC IPC(8): C01B17/04
CPCY02P20/129Y02P20/584
Inventor 张惊涛
Owner CHENGDU SEPMEM SCI & TECH
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