Device and method for treating NOX tail gas in nitric acid metal dissolving process and terminal

A treatment device, nitric acid technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as uncollected data and no discovery, and achieve the effect of reduced labor intensity and high degree of automation

Inactive Publication Date: 2020-04-28
汪子夏
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, there is no description or report of the similar technology of the present invention, and no similar data at home and abroad have been collected yet.

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  • Device and method for treating NOX tail gas in nitric acid metal dissolving process and terminal
  • Device and method for treating NOX tail gas in nitric acid metal dissolving process and terminal
  • Device and method for treating NOX tail gas in nitric acid metal dissolving process and terminal

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Embodiment Construction

[0078] The following is a detailed description of the embodiments of the present invention: this embodiment is implemented on the premise of the technical solution of the present invention, and provides detailed implementation methods and specific operation processes. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

[0079] Design principle explanation of the embodiment of the present invention:

[0080] The reaction of different active metals with different concentrations of nitric acid roughly follows the following reaction (Me represents the reactive metal):

[0081] Me+HNO 3 →Me(NO 3 )x+NO+NO 2 +H 2 O / H 2 ↑

[0082] NO produced during the dissolution process 2 With NO gas as the main component of NOx gas, NO 2 The gas is an absorbable gas and NO gas is a non-absorbable gas that must be c...

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Abstract

The invention provides a device for treating NOX tail gas in a nitric acid metal dissolving process. A gas-liquid mixing module is used for mixing gas and liquid in a kettle body, and a liquid phase forms negative pressure relative to other spaces in the kettle body through a mixing effect; an oxygenation control sensor collects an oxygen redundancy detection signal in the kettle body and sends the oxygen redundancy detection signal to an automatic control system; a pressure sensor and a temperature sensor respectively collect a pressure signal and a temperature signal of the kettle body and send the signals to the automatic control system; the automatic control system respectively controls a nitric acid control metering module, an oxygenation control module, a safety pressure relief module and a temperature control module to adjust the nitric acid adding speed, the oxygenation speed and the temperature in the kettle body according to the oxygen redundancy detection signal, the pressure signal and the temperature signal. The invention further provides a treatment method and a control terminal. The preparation process of nitrate and the absorption and the reuse of NOx gas are uniformly treated, and production, conversion, absorption and reuse of NOx are realized in one step in the reaction kettle.

Description

technical field [0001] The invention relates to the technical field of chemical engineering and environmental protection, in particular to a process of dissolving metals in nitric acid X Tail gas treatment device, method and terminal, especially for the preparation of silver nitrate in chemical reaction kettle, NO X Absorption and reuse of exhaust gas. Background technique [0002] Using metals, metal oxides or metal carbonates to react with nitric acid is currently the most common and simplest method for preparing nitrates. This method will inevitably produce NO while producing nitrates. X Exhaust gas pollutes the environment. With the improvement of national environmental protection requirements, the processing capacity of the packing waste gas absorption tower or pneumatic emulsification tower commonly used in the chemical industry in the past has lagged behind, and the treatment method of the waste gas absorption tower is only to convert the waste gas into waste solid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56B01D53/78B01D53/76
CPCB01D53/56B01D53/76B01D53/78B01D2251/102B01D2251/104B01D2251/106
Inventor 汪子夏陈林驰陈家帆朱瑞明穆成法夏金涛王开旭阮朝琪郝慧
Owner 汪子夏
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