Compound type high-efficiency absorption tower for nitric acid production and method for preparing acid
A kind of absorption tower, composite technology, applied in the field of high-concentration dilute nitric acid preparation
Active Publication Date: 2022-04-12
SEDIN ENG
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[0003] Patent No. CN204873838U discloses a nitric acid preparation absorption tower, which can further reduce emissions to the atmosphere by changing the top of the sieve tray to a bubble-cap tray The NOX gas content in the middle reduces the cost of the transformation of the absorption tower, but its absorption effect on the NOX gas still needs to be improved
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[0044] Embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and should not be construed as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.
[0045] figure 1 It is a structural schematic diagram of a composite absorption tower for nitric acid production proposed in an embodiment of the present application.
[0046] refer to figure 1 , figure 2 and image 3 , a compound absorption tower for nitric acid production, comprising a tower body 1 and an absorption area 2; Below the high-efficiency ...
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The invention provides a compound type high-efficiency absorption tower for nitric acid production. The absorption tower comprises a tower body and an absorption area, the absorption area is positioned at the upper part of the tower body, a plurality of layers of jet type efficient tower trays are arranged at the top of the absorption area, and a plurality of layers of absorption tower trays are arranged at the lower part; the jet type efficient tower tray comprises a first sieve plate, a plurality of first baffle plates and a jet cover are arranged on the first sieve plate, jet holes are formed in the side wall of the jet cover, first vent holes are formed in the surface of the first sieve plate, the first vent holes are located in the jet cover, and the second baffle plates are located in the jet cover. The spraying cover is provided with a first vent hole, so that nitric oxide gas introduced into the absorption area enters the spraying cover through the first vent hole and is sprayed out along the spraying hole; and a liquid flowing mode on the jet type efficient tower tray is double-S-shaped double-overflow. By arranging the jet type high-efficiency tower tray and arranging the jet cover on the jet type high-efficiency tower tray, the absorption efficiency of the nitric oxide gas is improved.
Description
technical field [0001] The application relates to the technical field of preparation of high-concentration dilute nitric acid, in particular to a compound type high-efficiency absorption tower for nitric acid production and a method for preparing the acid. Background technique [0002] In the process of nitric acid preparation, the absorption tower is usually used to absorb nitrogen oxide gas. In order to improve the absorption rate of nitrogen oxide gas during the absorption process, multi-layer trays are usually set up for absorption, and the structure of the trays is set to increase its absorption rate. , [0003] The patent No. CN204873838U discloses an absorption tower for nitric acid preparation. By changing the top of the sieve tray into a bubble-cap tray, it is possible to further reduce the emission of NO into the atmosphere. X gas content, reducing the transformation cost of the absorption tower, but its effect on NO X Gas absorption still needs to be improved. ...
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IPC IPC(8): B01D53/78B01D53/56C01B21/40
Inventor 韩芳周军王冀宁杨璐赵世平孙林
Owner SEDIN ENG