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Control system of nitrogen dioxide content

A technology of control system and nitrogen dioxide, which is applied in the field of control system, can solve the problems of failing to meet customer requirements and exceeding the standard of finished product nitric acid and nitrogen dioxide, and achieve the effect of solving the problem of excessive nitrogen dioxide content

Active Publication Date: 2014-03-12
宁夏润夏能源化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its index value is a guarantee index, but in the existing nitric acid production device, due to various reasons such as insufficient bleaching, high temperature or dilute acid pollution during production, the nitrogen dioxide of the finished nitric acid exceeds the standard and fails to meet customer requirements.

Method used

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  • Control system of nitrogen dioxide content

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Embodiment Construction

[0011] Below in conjunction with accompanying drawing, describe in further detail:

[0012] Such as figure 1 As shown, the system includes a finished acid tank 1, a gas cooler 2 and a gas distributor 3. The gas distributor 1 is built in the finished acid tank 1 at a place 20 cm away from the bottom, and the finished acid tank 1 is externally connected to a negative pressure device 6, and the gas distribution The output end of the device 1 is connected with the gas cooler 2 with a pipeline, and the gas cooler 2 is connected with the compressed air main pipe 4.1 and the nitrogen main pipe 4.2 respectively. The compressed air main pipe 4.1 and the nitrogen gas main pipe 4.2 are the output ends of the previous process. Valve d5.4 and valve e5.5 for controlling the switch of compressed air main pipe 4.1 and nitrogen main pipe 4.2 are respectively set on the connection pipeline between 4.1 and nitrogen main pipe 4.2 and gas cooler 2, and valve a5 is set on the bottom pipeline of gas...

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Abstract

The invention provides a control system of a nitrogen dioxide content. The control system comprises a finished product acid tank and a gas cooler, wherein the gas cooler is provided with a valve; the finished product acid tank is internally provided with a gas distributor, and an input end of the gas distributor is connected with an output end interface of the gas cooler; and an input end of the gas cooler is respectively connected with an output end of a compressed air master pipe and an output end of a nitrogen master pipe. The control system can be used for effectively solving and controlling the problem of nitrogen dioxide exceeding caused by high temperature decomposition during producing finished nitric acid so as to meet the requirement on production.

Description

technical field [0001] The invention relates to a control system in the production process of finished nitric acid, in particular to a control system capable of controlling the content of nitrogen dioxide in the finished acid. Background technique [0002] Nitric acid is one of the most important chemical products. Nitric acid is mainly produced by ammonia oxidation in industry, and is used to make fertilizers, explosives, nitrates, etc. Pure nitric acid is a colorless transparent liquid, and industrial concentrated nitric acid is brown due to dissolved nitrogen dioxide. According to the requirements of GB / T 337.1-2002 industrial nitric acid, the technical index of concentrated nitric acid has two specifications of 98 acid and 97 acid. The mass fraction of nitrous acid contained in these two specifications is not more than 0.5% for 98 acid and 97 acid Not more than 1.0%. Its index value is a guarantee index, but in the existing nitric acid production device, due to various...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/38
Inventor 孙虎
Owner 宁夏润夏能源化工有限公司
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