Device for removing free sulfur trioxide gas in fuming sulfuric acid
A technology for fuming sulfuric acid and sulfur trioxide, applied in sulfur trioxide/sulfuric acid and other directions, can solve the problems of smoke from exhaust chimneys, increase investment, corrode impellers, etc., and achieve the advantages of improving absorption efficiency, simple device structure and reducing environmental pollution. Effect
Inactive Publication Date: 2016-12-14
JINCHUAN GROUP LIMITED
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Problems solved by technology
However, 104.5% oleum has particularity. If the traditional method is used for degassing, a large amount of free SO 3 The gas is very easy to form acid mist with the moisture in the flue gas at the outlet of the second-stage electric demister in the purification process, which cannot be removed in the subsequent process. A large amount of acid mist entering the fan will corrode the impeller, and will adversely affect subsequent equipment and catalysts, resulting in exhaust gas chimney smoke
And if a new degassing device is built, on the one hand, it will increase the investment, and on the other hand, it will take up a certain amount of site space
Method used
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[0009] Such as figure 1 As shown, a device for removing free sulfur trioxide gas in oleum, comprising a suction chamber 1, a mixing chamber 2, a diffusion chamber 3, a fuming sulfuric acid absorption tower 4 connected sequentially from top to bottom, the suction chamber The upper end is connected with the oleum storage tank 5 and the top of the oleum tank car 6, and a sulfuric acid nozzle 7 is arranged in the suction chamber; the device also includes a sulfuric acid absorption tower 8, a circulating acid pump 9, a sulfuric acid absorption tower, a circulating acid The pump and the sulfuric acid nozzle are connected in sequence, and the sulfuric acid absorption tower is used to store sulfuric acid with a concentration of 98%.
[0010] When in use, the sulfuric acid fluid with a high-pressure concentration of 98% is sprayed into the suction chamber through the sulfuric acid nozzle, and the amount of 98% sulfuric acid added is 5m 3 / h, the concentration is 98% sulfuric acid high...
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The invention relates to the technical field of chemical environmental protection, in particular to a device for removing free sulfur trioxide gas in fuming sulfuric acid. The device is characterized by comprising a suction chamber, a mixing chamber, a diffusion chamber and a fuming sulfuric acid absorption tower which are sequentially connected from top to bottom, wherein the upper end of the suction chamber is respectively connected with a fuming sulfuric acid storage tank and the top of an acid trailer of the fuming sulfuric acid; a sulfuric acid nozzle is arranged in the suction chamber. The device is capable of effectively absorbing the free SO3 gas, is simple in operation, improves the absorption efficiency, saves investment and reduces environmental pollution.
Description
technical field [0001] The invention relates to the technical field of chemical engineering and environmental protection, in particular to a device for removing free sulfur trioxide gas in oleum. Background technique [0002] During storage and charging of 104.5% oleum, a large amount of free SO 3 The gas will escape from the top of storage tanks and tank trucks, forming a large amount of acid mist, which will cause serious pollution to the surrounding environment. The dry suction process of the traditional acid system often uses the negative pressure of the outlet flue of the electric demister in the purification process to effectively remove the flue gas. However, 104.5% oleum has particularity. If the traditional method is used for degassing, a large amount of free SO 3 The gas is very easy to form acid mist with the moisture in the flue gas at the outlet of the second-stage electric demister in the purification process, which cannot be removed in the subsequent process...
Claims
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Login to View More IPC IPC(8): C01B17/69
CPCC01B17/69
Inventor 史万敬程华花李山东程楚谢成张莉敏柴瑾瑜迟栈洋侯海明高丽娜高延润
Owner JINCHUAN GROUP LIMITED