Claus tail gas condensing treatment process

Abstract

The invention relates to a Claus tail gas condensing treatment process, which comprises the steps that Claus tail gas coming from a Claus process sulfur condenser enters a heat exchanger I, gaseous sulfur is condensed and removed; the gaseous sulfur-removed Claus tail gas is sent to a desulfurizing absorption tower and is sprayed by adopting a doctor solution coming from a gas purification device, rich liquor is returned to the gas purification device for regeneration, and regenerated acid gas is used as a raw material for a Claus process; the upper part of the desulfurizing absorption tower is provided with an alkali washing section, and alkali liquor is a replenishing solution coming from a desulfurizing unit of the gas purification device; after the removal of H2S, the Claus tail gas is sent to a coke oven gas system or is returned to a returned gas system; the heat exchanger I and a heat exchanger II work in a cyclic alternating pattern, and the continuous condensing of the gaseous sulfur in the Claus tail gas is realized. The Claus tail gas condensing treatment process has the remarkable advantages of small investment, low operating cost, energy conservation, greenness, environmental protection and the like.

Description

technical field [0001] The invention relates to the technical field of recovery of coking chemical products, in particular to a Claus tail gas condensation treatment process. Background technique [0002] At present, the Claus process in the coking industry has no tail gas treatment measures, and its tail gas is blended back to the coke oven gas system. [0003] The Claus process in the coking industry usually consists of a combustion section and a one-stage and two-stage catalytic section. By controlling the H in the combustion section 2 The incomplete combustion ratio of S makes 1 / 3 of H 2 S generates SO 2 , H 2 S and SO 2 This produces elemental sulfur. To the catalytic section, under the action of the catalyst, H 2 S and SO 2 Stoichiometric reaction generates elemental sulfur; then condenses the generated gaseous sulfur into liquid sulfur for separation. [0004] In the Claus reaction, its progress is limited by the reaction temperature, chemical equilibrium, rev...

AI Technical Summary

Problems solved by technology

Practice shows that, taking the scale of annual production of 3 million tons of coke as an example, the N 2 The content increases by 2-3%, and the energy consumption increases by about 200KW in the process of producing methanol and LNG

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