swsr-1 sulfur recovery process

Abstract

The invention relates to an SWSR (SunWay Sulfur recovery)-1 device and technique. The invention relates to a tail gas treatment combination device and technique by adopting Claus sulfur recovery and ionic liquid cycle absorption process. The device comprises a sulfur production burning furnace, a Claus reaction system, a sulfur production tail gas incinerator, a rich SO2 process gas heat exchanger, an SO2 absorption tower, a rich liquid pump, a lean and rich liquid heat exchanger, an SO2 regeneration tower and a lean liquid feed pump. The technique comprises the steps: (1) enabling hydrogen sulfide-containing acid gas to generate a Claus reaction, and recovering sulfur and heat energy in the reaction process; (2) burning sulfur production tail gas to generate SO2; (3) removing SO2 from rich SO2 process gas through an ionic liquid absorption tower; and (4) feeding rich SO2 ionic liquid into a regeneration tower for separating and regenerating sulfur. The ionic liquid is an aqueous solution which takes organic positive ions and inorganic anions as main components and a little amount of activating agent and antioxidant as additives. The SWSR-1 device and technique are low in equipment investment, high in material safety, short in technique flow, safe and reliable in technique processes, high in SO2 recovery rate, and the content of SO2 in effluent gas can be reduced by 50ppm below which can meet the national regulation requirement.

Description

technical field [0001] The invention relates to a new process suitable for sulfur recovery and tail gas treatment, in particular to a new sulfur recovery and tail gas treatment process formed by optimizing and improving a conventional Claus process and an ionic liquid recovery process for sulfur dioxide. Background technique [0002] my country has been advocating energy conservation and emission reduction work, strictly controlling the emission of sulfur dioxide in the atmosphere. Before 2012, the emission concentration of sulfur dioxide stipulated by the national standard was no higher than 960mg / g. At present, the relevant national departments are planning to revise the comprehensive emission standard of air pollutants, requiring the concentration of sulfur dioxide emission from newly built sulfur plants to be less than 400mg / Nm 3 (Specific area emission concentration is less than 200mg / Nm 3 ). Sinopec actively implements the green and low-carbon development strategy, a...

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Problems solved by technology

The process is long, requires the use of hydrogenation technology, and has high safety control requirements for the device, and the sulfur recovery effect cannot meet the needs of further improvement in environmental protection requirements

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