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

A technology of process system and process method, which is applied in the field of smelting sulfur-containing flue gas treatment, can solve the problems of high energy consumption and large corrosion of equipment, and achieve the effects of reducing energy consumption, avoiding corrosion, and ensuring long-term operation

Pending Publication Date: 2019-03-26
KEYON PROCESS +1
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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

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

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Embodiment 1

[0060] Flue gas composition: 2% SO 2 , 15.5% O 2 , 3.6% CO 2 , 77.5%N 2 , 1.4%H 2 O, said percentage is mole percentage.

[0061] Such as figure 1 Shown, SO 2 Convert SO 3 The active ingredient of the catalyst is mostly V 2 o 5 . Because the sulfur-containing flue gas needs to reach a certain reaction temperature before entering the catalyst. The flue gas preheating in the front stage, the heat of flue gas preheating comes from the heat generated by the condensation of sulfuric acid first, and the heat generated by the waste pot and the heat released by each reaction bed can also be used later. The specific process is shown in the attached drawing.

[0062] After the front-end chilling and dust removal, cooling and purification, the low-concentration smelting sulfur-containing flue gas (hereinafter collectively referred to as acid process gas) enters the cold end inlet of flue gas preheater 1 to preheat the acid process gas to 165°C. The hot end of the flue gas pre...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/80C01B17/79C01B17/76
CPCC01B17/76C01B17/79C01B17/80
Inventor 黄锐王丹章华勇张媛齐俊岭
Owner KEYON PROCESS
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