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Preparation method for industrial nitric acid

A nitric acid, industrial technology, applied in the field of industrial nitric acid production, can solve the problems of inability to break bubbles, use restrictions, inability to fully dissolve nitrogen dioxide, etc., to achieve the effect of improving reaction efficiency and reducing pollution

Active Publication Date: 2018-09-18
东营睿港投资服务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technical scheme can lower the temperature of the distilled water in the absorption tower, the technical scheme cannot crush the bubbles in the absorption tower, so that the nitrogen dioxide in the bubbles cannot be fully dissolved and reacted; the use of this invention is limited

Method used

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  • Preparation method for industrial nitric acid
  • Preparation method for industrial nitric acid
  • Preparation method for industrial nitric acid

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Embodiment approach

[0044] As an embodiment of the present invention, the cooling device 2 includes an infusion unit 21 and a cooling unit 22, and the infusion unit 21 includes a cooling cylinder 211, a No. 1 partition 212 and a No. 1 water pipe 213; two No. 1 partitions 212 is fixed seamlessly and symmetrically installed on the inner wall of the cooling cylinder 211; multiple No. 1 water pipes 213 are connected between the two No. 1 partitions 212; the cooling unit 22 is located between the two No. 1 partitions 212, The cooling unit 22 is used to cool the No. 1 water pipe 213; during operation, the distilled water in the absorption layer 18 enters the cooling cylinder 211 through the No. 1 liquid through hole 15 and the liquid supply pipe 16, and then enters through a plurality of No. 1 water pipes 213 In the cooling unit 22, a plurality of No. 1 water pipes 213 are used to divide the distilled water in the cooling device 2, which increases the cooling area of ​​the No. 1 water pipe 213 of the co...

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Abstract

The invention belongs to the technical field of preparation of nitric acid, and in particular relates to a preparation method for industrial nitric acid. The method comprises steps 1 to 7, wherein step 4, step 5 and step 6 cooperate and are used for absorption of nitrogen dioxide by distilled water, and step 7 is used for absorption of nitrogen dioxide when a reaction is finished. Absorption apparatus used in the method comprises an absorption tower, a cooling device and air pressure stirring devices; a sieve plate divides the absorption tower into a plurality of absorption layers, and the interior of each absorption layer is provided with one air pressure stirring device; the exterior of the absorption tower is provided with the cooling device; and each air pressure stirring device comprises one telescopic unit and one stirring unit, and the stirring units are used for breaking bubbles in the absorption layers and accelerating dissolution of a gas. The method provided by the inventionmainly utilizes water to absorb the nitrogen dioxide gas, can improve preparation efficiency of the nitric acid and reduce pollution of the nitrogen dioxide to air.

Description

technical field [0001] The invention belongs to the field of nitric acid production equipment, in particular to a method for preparing industrial nitric acid. Background technique [0002] At present, the absorption tower is an industrial equipment for absorbing nitrogen dioxide or liquid. It is widely used in the production processes of chemicals, coatings, paints, and pharmaceutical intermediates. Nitrogen dioxide gas produced by the reaction of ammonia and air in the nitric acid industry enters the bottom of the absorption tower, distilled water flows from the top of the tower from top to bottom, and reacts with the rising nitrogen dioxide to form a nitric acid solution. This absorption process is exothermic. chemical reaction process. According to the relevant principles of chemical thermodynamics, the heat of reaction in the tower needs to be removed from the equipment in time to improve the efficiency of absorbing nitrogen dioxide in the absorption tower. At present,...

Claims

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Application Information

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IPC IPC(8): C01B21/40
CPCC01B21/40
Inventor 胡自然周军鹏
Owner 东营睿港投资服务有限责任公司
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