Sulfur recovering heat utilization device and method

Abstract

The invention discloses a sulfur recovering heat utilization device and method. The device comprises a steam air cooler, a condensed water recovery tank and a condensed water pump which are connected with one another in sequence, wherein the steam air cooler is connected with a steam pipeline of all stages of sulfur condensate coolers through a pipeline, and a height difference exists between a condensed water outlet of the steam air cooler and an inlet of the condensed water recovery tank; a pressure-regulating emptying pipeline is arranged at the tank top of the condensed water recovery tank, and the condensed water recovery tank is connected with various water traps of the sulfur recovery device through the pipeline and is also in water supply connection with a low-pressure boiler of a plant system through a water replenishing pipeline; the condensed water pump is connected with a water pipeline on all the stages of sulfur condensate coolers through the pipeline. The sulfur recovering heat utilization device and the method have the benefits that a part of heat in the sulfur recovery process is effectively taken away by utilizing a steam-condensed water self-circulating system, limitation on the specification of the plant steam system is avoided, and the outlet temperature of the sulfur condensate coolers is further reduced, so that the total sulfur recovery rate is further effectively improved.

Description

technical field [0001] The invention relates to a recovery device and method for utilizing the heat generated in the Claus sulfur recovery process. Background technique [0002] With the massive development of sour crude oil and natural gas resources in the world, and the application of sour coal mines in coal-to-oil and coal-to-gas fields, the Claus method 2 The process of recovering elemental sulfur from S acid gas has become an important part of natural gas processing, refinery and coal chemical industry. [0003] The improved Claus sulfur recovery process includes high temperature reactions above 1000°C (reaction equations (1) and (2)) and catalytic reactions below 400°C (reaction equation (3)). Regardless of whether it is in the high temperature reaction section or in the catalytic reaction section, the Claus reaction will release a lot of heat. Especially in the catalytic reaction section, the Claus reaction is an exothermic reaction, and the reaction itself is a rev...

AI Technical Summary

Problems solved by technology

Due to the limitation of the saturated vapor pressure and the heat transfer temperature of the sulfur condensing cooler, the temperature at the outlet of the sulfur condensing cooler is usually not lower than 165°C, while the freezing point of liquid sulfur is 116°C, so the sulfur content at the outlet of the condensing cooler cannot be further reduced The temperature of the steam process gas will greatly reduce the efficiency of sulfur vapor condensing into liquid sulfur in the condensing cooler, thereby affecting the sulfur yield of the entire sulfur recovery unit

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