Method and device for preparing high-concentration dilute nitric acid
A dilute nitric acid, high-concentration technology, applied in nitric acid, nitrogen oxides/oxyacids, etc., can solve the problem of low concentration of dilute nitric acid, and achieve the effect of promoting oxidation reaction, increasing acid concentration, and improving absorption rate
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[0041] In order to further understand the technical content, characteristics and effects of the present invention. Take a company's nitric acid production plant with an annual output of 270,000 tons as an example, and describe it in detail with the accompanying drawings.
[0042] like figure 1 As shown, the first-stage air filter of the four-stage air filter device 5 communicates with the ammonia-air condenser 4, the droplet separator 3, and the air preheater 2 successively, and the air preheater 2 communicates with the four-stage air filter device 5 again. The second, third, and fourth-stage air filters are connected, and the air outlet of the fourth-stage air filter device 5 is connected with the air compressor 1, which is used to make the air pass through the first-stage air filter to remove impurities, cool down and condense through the ammonia-air condenser 4, The condensed water is removed by the droplet separator 3, the dust is removed by the second, third and fourth a...
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