Device and method of reclaiming and processing tail gas of sulfur

Abstract

A sulfur recovery and offgas processing device and a method therefor is characterized in that the device comprises a thermal reaction section, a catalytic reaction section and a reducing absorption section. In the thermal reaction section, hydrogen sulfide acid gas is partly burnt in a main burner (1) to convert into sulfur dioxide, hydrogen sulfide and sulfur dioxide proceed claus reaction to generate process gas such as elemental sulphur, the process gas is cooled by a waste-heat boiler (2) and a primary condensate cooler (3) to obtain liquid sulfur; in the catalytic reaction section, the process gas is reacted through a primary reheat hydrogen furnace (4), a secondary steam reheater (7), two stage reactor (5, 8), then separating liquid sulfur is cooled by two stage condensate cooler (6, 9) then enters into the reducing absorption section; in the reducing absorption section, the process gas is heated by a steam heater (10) then hydrogenizated in a hydrogenation reactor (11), cooled in a process gas cooler (12) and enters into a quench tower (13) which top connecting with bottom of a absorber (16), top of the absorber connects with a incinerator (18), the incinerator connects with a chimney (19).

Description

technical field [0001] The invention relates to a sulfur recovery and tail gas treatment device and a method for sulfur recovery and tail gas treatment, belonging to the field of sulfur recovery and tail gas treatment. Background technique [0002] With the development of science and technology, my country's demand for oil and natural gas is increasing. Some oil and natural gas contain sulfur. In order to produce clean energy, sulfur needs to be removed, usually in the form of hydrogen sulfide. In the treatment of acid gas containing hydrogen sulfide, at present, it is mainly to convert hydrogen sulfide into elemental sulfur as much as possible. The more economical treatment process is that the sulfur recovery rate is about 99%, but it cannot meet the current national environmental protection standard GB16297 "Air Pollutants According to the requirements of the Comprehensive Emission Standard, the content of sulfur dioxide in the exhaust gas is less than or equal to 960mg / m ...

AI Technical Summary

Problems solved by technology

When the operation is unstable, hydrogenation is very likely to be incomplete, which may cause sulfur dioxide breakthrough accidents, that is, sulfur dioxide enters the subsequent cooling system and MDEA solution absorption system, causing equipment corrosion and solution deterioration. When the accident is serious, the solution system may be damaged. The MDEA solution needs to be completely replaced, resulting in large economic losses

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