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Claus tail-gas processing technology

A Claus tail gas and treatment process technology, which is applied in the field of Claus tail gas treatment process, can solve the problems of increased energy consumption and achieve the effects of simplified construction, energy saving and guaranteed desulfurization effect

Pending Publication Date: 2017-12-22
ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Claus tail-gas processing technology

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Embodiment Construction

[0030] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0031] like figure 1 Shown, a kind of Claus tail gas treatment technique described in the present invention comprises the steps:

[0032] 1) The Claus tail gas from the Claus process sulfur condenser is mixed with the reducing gas and enters the hydrogenation reactor 2 after exchanging heat with the process gas from the first-stage reactor in the first-stage process gas heat exchanger 1 , convert almost all of the sulfur and sulfides in the Claus tail gas into H 2 S;

[0033] 2) The Claus tail gas coming out from the hydrogenation reactor 2 enters the second-stage process gas heat exchanger 3 to exchange heat with the process gas entering the second-stage reactor for cooling, and then passes through the three-pass sulfur condenser 4 to produce low-pressure steam, from which After the Claus tail gas from the three-pass sulfur condenser 4 is cool...

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PUM

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Abstract

The invention relates to a Claus tail-gas processing technology. Claus tail gas discharged from a Claus technology sulfur condenser and process gas discharged from a one-section reactor are subjected to heat exchange in a one-section process gas heat exchanged, mixed gas and reductive gas are mixed to enter a hydrogenation reactor, and almost all sulfur and sulfide in the Claus tail gas can be converted into H2S; then, the H2S enters a second-section process gas heat exchanger to be subjected to heat exchange cooling with the process gas which enters a second-section reactor; through a third-route sulfur condenser, low-pressure steam is generated, and the Claus tail gas discharged from the third-route sulfur condenser is cooled through a condensation cooler, and then enters a gas-liquid separator to be subjected to gas-liquid separation; then, the obtained gas is pressurized into a desulfurization adsorption tower to remove H2S to be below 200mg / Nm<3> or less, and the obtained gas is sent into a coke oven gas system or a melted gas system. The Claus tail-gas processing technology has the advantages of low operation cost, energy saving, greeness and environment protection.

Description

technical field [0001] The invention relates to the technical field of recovery of coking chemical products, in particular to a Claus tail gas 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, reversible react...

Claims

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Application Information

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IPC IPC(8): C01B17/16B01D53/14
CPCB01D53/1425B01D53/1462B01D53/1468C01B17/164Y02P20/151Y02P20/10
Inventor 徐作锋魏冰刘开源张素利
Owner ACRE COKING & REFRACTORY ENG CONSULTING CORP DALIAN MCC
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