Sulfur blockage preventing system based on wet redox desulfurization process

Abstract

The invention discloses a sulfur blockage preventing system based on a wet redox desulfurization process. The sulfur blockage preventing system comprises a separator, an absorption tower, a flash tank, a regeneration tower, a circulating pump, an air blower, a centrifuge, a barren liquor tank and a sulphur foam trough. The separator is connected with a gas inlet of the absorption tower, a rich liquor outlet of the absorption tower is connected with a feeding port of the flash tank, and a discharging port of the flash tank is connected with a feeding port of the regeneration tower; a barren liquor outlet of the regeneration tower is connected with the barren liquor tank, and the barren liquor tank is connected with a barren liquor inlet of the absorption tower through a first pipeline; the top of the regeneration tower is communicated with an inlet of the sulphur foam trough, and an outlet of the sulphur foam trough is communicated with a feeding port of the centrifuge; a washing liquid inlet is formed in the absorption tower, the desulfurization system further comprises a second pipeline, an inlet of the second pipeline is communicated with the first pipeline, and an outlet of the second pipeline is communicated with the washing liquid inlet in the absorption tower. According to the sulfur blockage preventing system, washing pipelines are installed at the bottoms of the absorption tower and the regeneration tower respectively to wash the absorption tower and the regeneration tower regularly, so that sulphur particles are preventing from adhering to or settling on the walls of the absorption tower and the regeneration tower.

Description

technical field [0001] The invention relates to a wet oxidation-reduction desulfurization process, in particular to an anti-sulfur plugging system based on a wet oxidation-reduction desulfurization process. Background technique [0002] The wet redox desulfurization method is a method that uses a solution containing an oxygen carrier to convert H in natural gas 2 Natural gas desulfurization method in which S is oxidized to elemental sulfur and the oxygen carrier is oxidized and regenerated by air. In the conventional wet redox process, the absorption process and the regeneration process are carried out in the two reactors of the absorption tower and the regeneration tower respectively, which are different from the amine or sulfone amine desulfurization-Claus method sulfur recovery-tail gas purification commonly used in natural gas purification. compared to the processing route, which is characterized by one step of the H 2 S is converted into simple S, and this method has ...

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Problems solved by technology

However, because the desulfurization solution contains solid-phase sulfur, which is faster than the amine method for sulfur analysis, the sulfur cannot be recovered in time, and there is a problem of sulfur blockage, which affects the continuous and safe operation of the equipment; moreover, when the sulfur blockage needs to be shut down to clean the equipment, this also causes a great economic loss

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