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SWSR-8 pressurization sulfur recovery process

A sulfur recovery and process technology, applied in the direction of sulfur compounds, sulfur preparation/purification, inorganic chemistry, etc., can solve the problems of underutilization of acid gas pressure, increase of equipment investment and floor area, large specifications, etc., to achieve reduction Effects of H2S content, device investment reduction, and usage reduction

Active Publication Date: 2016-09-21
SHANDONG SUNWAY PETROCHEMICAL ENGINEERING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the device adopting the Claus sulfur recovery and hydrogenation reduction absorption process, the specifications of each equipment and process gas pipeline are determined according to the pressure drop of the whole device at 40-50kPa. In order to meet the requirements of low pressure drop, the equipment and pipeline specifications are relatively large. Generally, the acid gas pressure that can be provided by the upstream device is 90-120kPa(g), the acid gas pressure is not fully utilized, and the investment and floor area of ​​the device increase accordingly

Method used

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Examples

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Embodiment

[0031] A SWSR-8 pressurized sulfur recovery process, comprising the following steps:

[0032] The acid gas enters the sulfur making furnace and is burned in the sulfur making furnace, and about 68% (v) of H in the furnace 2 S undergoes a high-temperature Claus reaction to convert sulfur, and the remaining H 2 1 / 3 of S is converted to SO 2 , The air required for combustion is supplied by the blower of the sulfur furnace.

[0033] The high-temperature process gas discharged from the self-made sulfur combustion furnace will generate 4.5MPa saturated steam through the sulfur waste heat boiler, and the temperature will drop to 350°C and enter the first-stage sulfur condenser to cool to 160°C. The condensed liquid sulfur will be separated from the process gas and flow out from the bottom into the sulfur-sealed tank. According to the reaction temperature requirements, the process gas is heated to about 240°C by the primary heater and enters the primary converter. Under the action ...

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PUM

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Abstract

The invention belongs to the field of sulfur recovery, and particularly relates to an SWSR-8 pressurization sulfur recovery process. The process comprises the steps that acid gas enters a sulfur making furnace, H2S is subjected to a high-temperature Claus reaction and converted into sulfur, and sulfur enters a two-stage converter to conduct two stage catalytic conversion for recovering sulfur; sulfur making tail gas enters a hydrogenation reactor, under the action of a hydrogenation catalyst, SO2 and COS are reduced to H2S through hydrogenation hydrolysis, reduced H2S gas is absorbed with an MDEA solution, and after purified tail gas recovers heat through incineration, flue gas is exhausted to the atmosphere through a chimney, wherein the pressure of acid gas entering the sulfur making furnace ranges from 90 kPa(g) to 120 kPa(g), and the pressure of the sulfur making furnace ranges from 90m kPa(g) to 120 kPa(g). The pressure of cooling and heat exchange equipment such as a sulfur making waste heat furnace, a first stage sulfur condenser, a second stage sulfur condenser, a third stage sulfur condenser, a steam generator and a tail gas waste heat boiler is higher than that in the prior art, the total heat transfer coefficient is increased, the occupied area is decreased, catalytic and absorption reactions can be conducted conveniently, the sulfur recovery rate is increased, and SO2 discharge is reduced.

Description

technical field [0001] The invention belongs to the field of sulfur recovery, and in particular relates to a SWSR-8 pressurized sulfur recovery process. Background technique [0002] At present, the domestic sulfur recovery and tail gas treatment technology adopts the Claus sulfur recovery process of high temperature thermal reaction and two-stage catalytic reaction, and the sulfur tail gas contains a small amount of H 2 S, SO 2 , COS, S x And other harmful substances, the discharge after direct incineration cannot meet the environmental protection requirements stipulated by the state. Sulfur recovery tail gas treatment methods mainly include low-temperature Claus method, selective oxidation method, and reduction-absorption method. The hydrogenation reduction absorption process is to recover sulfur from the elements S and SO in the tail gas 2 , COS and CS, etc., under a very small hydrogen partial pressure and extremely low operating pressure (about 0.01MPa ~ 0.06MPa), u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/04
CPCY02P20/129C01B17/0491C01B17/0426
Inventor 高炬
Owner SHANDONG SUNWAY PETROCHEMICAL ENGINEERING CO LTD
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