A high-efficiency and energy-saving sulfur recovery device and method

Abstract

The invention provides a high-efficiency and energy-saving sulphur recovery device and a high-efficiency energy-saving sulphur recovery method. The sulphur recovery device provided by the invention comprises a thermal reaction system, a Claus reaction system and an exhaust gas incineration and flue gas heat recovery system; a process method of the sulphur recovery device mainly comprises the following steps: performing a thermal reaction and a Claus reaction on an acidic raw gas to produce sulphur and sulphur production exhaust gas, and producing medium-pressure steam as a by-product; feedingthe sulphur production exhaust gas into an exhaust gas incineration furnace for incinerating; recovering heat energy from high-temperature flue gas which is produced by the exhaust gas incineration furnace through a flue gas convection chamber, namely, arranging a five-section heat exchange area, including an overheating section, a boiler water supply preheating section, an exhaust gas preheatingsection, a raw gas preheating section and a sulphur production air preheating section, in the flue gas convection chamber. By using the sulphur recovery device and the sulphur recovery method providedby the invention, the waste heat of the flue gas at the outlet of the exhaust gas incineration furnace can be fully utilized; the acidic raw gas, the sulphur production exhaust gas, and sulphur production air can be preheated to a high temperature; the temperature of a sulphur production combustion furnace can be increased; the conversion rate of the sulphur in the furnace is favourably improved;the consumption amount of fuel gas required by the incineration furnace can be reduced.

Description

technical field [0001] The present invention relates to the technical field of chemical industry, in particular to a high-efficiency and energy-saving sulfur recovery device and method, in particular to a high-efficiency and energy-saving sulfur recovery device and process formed by the optimized combination of Claus process and tail gas incineration heat recovery technology. Background technique [0002] The petrochemical industry is a relatively high energy-consuming industry, and energy conservation and consumption reduction have become a major factor related to the development of petrochemical enterprises and even the entire industry. At present, the relevant state departments have formulated a series of energy-saving and emission-reduction policies, and determined that an energy-saving standard system with advanced indicators and in line with national conditions will be built in the future. Major high-energy-consuming industries will achieve full coverage of energy consu...

AI Technical Summary

Problems solved by technology

In addition, the traditional sour feed gas and sulfur-making air preheating methods of sulfur recovery units mainly include external medium-pressure steam or self-produced medium-pressure steam. In addition to increasing equipment investment and operating costs, these two preheating methods are often used as The steam pressure of the heat source also limits the preheating temperature, even with 4.1MPa steam, the preheating temperature is only about 240°C

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