Technology for preparing high-quality sulfuric acid from non-ferrous metal smelting flue gas
A technology for smelting flue gas and non-ferrous metals, which is applied in the direction of non-metallic elements, sulfur trioxide/sulfuric acid, sulfur compounds, etc., can solve the one-time investment and operation cost problems such as high power consumption, water consumption or steam consumption of desulfurizer, and achieve Low one-time investment and operating costs, reduced impurity content, and obvious effects
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[0018] Example 1
[0019] This embodiment provides a process for producing high-quality sulfuric acid from non-ferrous metal smelting flue gas. The equipment used in the process is as follows, including a sulfuric acid decolorization reactor 1, a sulfuric acid storage tank 2, a sulfuric acid pump 3, a washing tower 4, and a cooler connected in sequence 5; The upper part of the scrubbing tower 4 is connected to the sulfuric acid pump 3 through a pipeline, the lower part of the scrubbing tower 4 is connected to the cooler 5 through a pipeline, and the lower part of the scrubbing tower 4 is also connected to the sulphuric acid tail gas pipe 7, which passes through The fan 6 is connected to the lower part of the washing tower 4; among them, the fan 6 is a booster fan, the washing tower 4 is a packed tower, the sulfuric acid storage tank 2 is a sulfuric acid underground storage tank, and the sulfuric acid decolorization reactor 1 is equipped with water inlet, acid inlet and Adding a d...
Example Embodiment
[0022] Example 2
[0023] Using the device of Example 1, the processing flow is 12m 3 / h of concentrated sulfuric acid with a mass concentration of 98.5%, the ash content does not meet the criteria for qualified products, and the transparency and chroma do not reach the first-class indicators; SO in the tail gas of acid production 2 The concentration is 450mg / m 3 , Exceeding the current emission standard limit.
[0024] After the operation of the device, the various indicators of the sulfuric acid produced in this example have reached the top grade, and the SO in the tail gas discharged from the chimney to the atmosphere 2 The concentration is far below the limit in the standard, which is 40mg / m 3 , The desulfurization rate is 91%, and no dense smoke is seen.
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