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Nitrogen tetroxide tail gas recycling system

A dinitrogen tetroxide and tail gas technology, applied in nitrogen oxides/oxyacids, chemical instruments and methods, and separation of dispersed particles, can solve problems such as high cost, achieve high utilization, reduce pollution, and promote reactions Effect

Active Publication Date: 2014-04-02
ANHUI HUAIHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its production process involves the use of raw material ammonia and noble metal catalysts, and its cost is relatively high

Method used

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  • Nitrogen tetroxide tail gas recycling system

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Embodiment Construction

[0028] Below in conjunction with accompanying drawing, describe in further detail:

[0029] Such as figure 1 As shown, a recovery and utilization system of dinitrogen tetroxide tail gas includes a receiver 1 for receiving and delivering dinitrogen tetroxide, and the exhaust end of the top of the receiver 1 passes through an exhaust pipe 8-2 and a mixer 2 The inlet port of the mixer 2 is connected with an air pipe 8-4 and a dinitrogen tetroxide tail gas pipe 8-3 for conveying tail gas in the dinitrogen tetroxide production equipment respectively; the gas outlet of the mixer 2 The end is connected with the intake end at the bottom of the absorption tower 3, and the top of the absorption tower 3 is connected with a spray water pipe 8-5; the liquid outlet at the bottom of the absorption tower 3 is connected with the acid storage tank 4. An acid transport pipe 8-1 is arranged between the circulating pump 5 and the circulating cooler 6, and the finished dilute nitric acid is loaded...

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Abstract

The invention provides a nitrogen tetroxide tail gas recycling system which comprises a receiver for receiving and conveying nitrogen tetroxide, wherein an exhaust end at the top end of the receiver is connected with a gas inlet end of a blender through an exhaust pipe, an air pipe and a nitrogen tetroxide tail gas pipe used for conveying the tail gas in nitrogen tetroxide production equipment are respectively connected on the blender, a gas outlet end of the blender is connected with a gas inlet end at the bottom of an absorption tower, a spraying water pipe is connected at the top end of the absorption tower, and a liquid outlet end at the bottom end of the absorption tower is connected with an acid storage tank. The nitrogen tetroxide tail gas recycling system fully uses a N2O4 production device and the N2O4 tail gas not completely utilized during loading and unloading and transferring, water and air are added to react sufficiently to produce dilute nitric acids the concentration of which is smaller than 68% and which meet different concentration requirements, in addition, the content of NO2 in the air is lower than 200PPM and reaches the emission standard, the purposes of saving energies and protecting environments are fulfilled, and the production cost is saved.

Description

technical field [0001] The invention relates to the technical field of dinitrogen tetroxide, in particular to a recovery and utilization system for dinitrogen tetroxide tail gas in a production process. [0002] Background technique [0003] Dinitrogen tetroxide, molecular formula N 2 o 4 , a colorless gas, a strong oxidant, with a boiling point of 21.5°C and a liquid at this temperature. The density of liquid dinitrogen tetroxide is 1443kg / m 3 ;, can spontaneously combust with many fuels, and is an excellent oxidizer. With the development of industry, liquid dinitrogen tetroxide is used more and more widely, and it is currently one of the most important rocket propellants. However, due to the low boiling point of dinitrogen tetroxide, which is only 21.5°C, the colorless dinitrogen tetroxide can also be transformed into dark brown NO at room temperature. 2 , whose reaction formula is N 2 o 4 =2NO 2 , so part of the nitrogen tetroxide is converted into nitrogen dioxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/56C01B21/40
Inventor 孙虎
Owner ANHUI HUAIHUA
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