High sulfur-content sewage negative pressure gas stripping desulfurization and sulfur-containing tail gas purifying apparatus and technology thereof

Abstract

The invention belongs to the technical field of a high sulfur-content gas field natural gas exploitation and sulfur-containing sewage processing technology, and concretely relates to a high sulfur-content sewage negative pressure gas stripping desulfurization and sulfur-containing tail gas purifying apparatus and a technology thereof. The high sulfur-content sewage negative pressure gas strippingdesulfurization and sulfur-containing tail gas purifying apparatus comprises a PLC control system, a pH adjusting device, a pretreatment apparatus, a negative pressure gas stripping apparatus, a finedesulphurization apparatus, an oxidative regeneration apparatus, a sulphur separator, and a heat exchange system. The high sulfur-content sewage negative pressure gas stripping desulfurization and sulfur-containing tail gas purifying apparatus and the technology reduce the energy consumption for processing sulfur-containing sewage, increase the separating efficiency of H2S in the sulfur-containingsewage, and can be widely used for sulfur-containing sewage desulphurization treatment in natural gas exploitation and petroleum exploitation.

Description

technical field [0001] The invention belongs to the technical field of natural gas development in high-sulfur gas fields and treatment of sulfur-containing sewage, and in particular relates to a negative-pressure air stripping desulfurization and sulfur-containing tail gas purification device and process for highly H2S-containing sewage. Background technique [0002] The desulfurization treatment process of high-sulfur sewage can be summarized as "positive pressure air stripping-oxidation-flocculation sedimentation three-stage desulfurization + reinjection" process. 300mg / L; Oxidative desulfurization can choose an appropriate oxidant as an oxidative desulfurizer according to the nature of the sewage; Precipitation desulfurization can remove sulfur in low-sulfur sewage to below 5mg / L. The existing process can basically meet the existing desulfurization wastewater reinjection standard, but the "positive pressure gas stripping-oxidation-precipitation three-stage sulfur removal"...

AI Technical Summary

Problems solved by technology

The existing process can basically meet the existing desulfurization wastewater reinjection standard, but the "positive pressure gas stripping-oxidation-precipitation three-stage sulfur removal" process needs to consume a large amount of natural gas or nitrogen and chemicals, and also increases the amount of wastewater produced; chemical The sludge produced by sedimentation is converted to SO during incineration 2 , easy to form acid rain and cause air pollution

[0003] With the increasingly stringent environmental protection standards, it is necessary to develop new desulfurization technology to solve the situation of high pressure of reinjection of sulfur-containing wastewater and higher operation and maintenance costs of the reinjection system; therefore, it is necessary to research and create new equipment in order to better A process device for desulfurization of sulfur-containing sewage and desulfurization of sulfur-containing tail gas to achieve the purpose of energy saving and consumption reduction

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