Technical system and technical method for converting sulfur-containing exhaust gas into sulfuric acid

Abstract

The invention discloses a technical system and a technical method for converting a sulfur-containing exhaust gas into sulfuric acid. The technical system comprises an exhaust gas preheater, an exhaustgas fan and a sulfuric acid vapor condenser, wherein the exhaust gas preheater is used for preheating the sulfur-containing exhaust gas to above dew point temperature at 15-30 DEG C; a glass tube isserved as a heat exchange tube of the exhaust gas preheater; the exhaust gas fan is used for boosting the preheated acidic process gas, conveying one part into a combustion furnace and conveying the other part into a process gas steam heater; the combustion furnace and the process gas steam heater are connected with each other and then are connected with a combined reactor; the combined reactor isused for catalytically oxidizing SO2 in the acidic process gas into SO3; the sulfuric acid vapor condenser is used for condensing the SO3 generated by the combined reactor into sulfuric acid; a coldend of the sulfuric acid vapor condenser is connected with the exhaust gas preheater and is used for supplying hot air to the exhaust gas preheater. The device provided by the invention is capable ofresisting against the fluctuation of SO2 concentration in raw gas and is capable of achieving considerable economic benefit of the device and reasonable utilization of energy.

Description

technical field [0001] The invention relates to the technical field of smelting sulfur-containing flue gas treatment, in particular to a process system and a process method for converting sulfur-containing flue gas into sulfuric acid. Background technique [0002] SO 2 It is one of the main pollutants in the atmosphere and an important indicator to measure whether the atmosphere is polluted. Sulfur dioxide is a serious hazard to health, and it is also an important source of acid rain, which damages the ecological environment. SO 2 Feed gases come from various sources, mostly from the combustion of sulfur-containing fuels. The front-end treatment of desulfurization is the desulfurization of sulfur-containing fuels, and the back-end treatment is the desulfurization of sulfur-containing flue gas. At present, smelting sulfur-containing flue gas cannot meet the existing relevant standards for emission. [0003] The more common technologies for desulfurization of smelting sul...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the defects of high energy consumption and large equipment corrosion of the low-concentration smelting sulfur-containing flue gas treatment device in the prior art, and provide a production system for converting sulfur-containing flue gas into sulfuric acid and Production Process

Images