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A kind of production equipment of magnesium nitrate method to produce concentrated nitric acid

A production equipment and a technology for concentrated nitric acid, applied in the field of concentrated nitric acid production, can solve the problems of inability to rationally utilize tower tail water, inability to realize energy saving and emission reduction, and high acid concentration in acidic wastewater, and achieve the saving of caustic soda consumption, low resistance, and the number of theoretical plates. high effect

Active Publication Date: 2021-05-11
宁夏润夏能源化工有限公司
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Problems solved by technology

Although this method can effectively meet the requirements of environmental protection discharge, the acid concentration of acidic wastewater is high, and it needs to consume a large amount of liquid caustic soda for neutralization with alkali, which is costly, and the acidic wastewater from tower tail water and magnesium tail water cannot be rationally used, and energy saving and reduction cannot be achieved. Row

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  • A kind of production equipment of magnesium nitrate method to produce concentrated nitric acid
  • A kind of production equipment of magnesium nitrate method to produce concentrated nitric acid
  • A kind of production equipment of magnesium nitrate method to produce concentrated nitric acid

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Embodiment Construction

[0022] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0023] The embodiment of the present invention provides a kind of production equipment that magnesium nitrate method produces concentrated nitric acid, refer to figure 1 , figure 2 and image 3 :

[0024] A kind of production equipment of concentrated nitric acid produced by magnesium nitrate method, said production equipment compri...

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Abstract

The embodiment of the present application shows a kind of production equipment for producing concentrated nitric acid by magnesium nitrate method. Through the transformation of the concentration tower, the occurrence of wall flow and vertical downflow of magnesium nitrate solution can be effectively avoided, and the concentration of dilute nitric acid can also be greatly reduced. The content of magnesium is such that the concentration of magnesium tail water formed by the condensation of the acid vapor evaporated from the magnesium nitrate evaporator is below 0.1%. By adding an acid separator, the magnesium tail water and acid vapor can be fully exchanged in gas-liquid in the acid separator, effectively reducing the concentration of the tower tail water. Magnesium tail water is used as production water and sent to the circulating pool as supplementary water for production. Through the above modification, the comprehensive utilization of tower tail water and magnesium tail water acidic wastewater can be realized, and zero discharge of acidic wastewater can be realized.

Description

technical field [0001] The invention relates to the technical field of concentrated nitric acid production, in particular to a production equipment for producing concentrated nitric acid by a magnesium nitrate method. Background technique [0002] The magnesium nitrate method concentrated nitric acid production process is a process in which magnesium nitrate solution is used as a dehydrating agent to distill dilute nitric acid to produce concentrated nitric acid. Due to the characteristics of this process, while the nitric acid vapor is condensed in the concentrated nitric acid condenser to generate concentrated nitric acid, a small amount of tail gas and non-condensable gas is circulated through the tower tail water ejector to form a negative pressure and pumped to the tower tail water circulation tank for circular absorption to form acidic tower tail water. The dilute magnesium nitrate solution contains a small amount of non-condensable acid gas produced during the concent...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/42B01D3/16B01D3/42
CPCB01D3/16B01D3/42C01B21/42
Inventor 杨超戴付龙魏巍刘伟柏发路刘光明姚莉王娟
Owner 宁夏润夏能源化工有限公司
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