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Device for recycling nitric acid from waste liquor containing copper nitrate and use method of device

A technology of copper nitrate and pickling waste liquid, which is applied in the direction of nitric acid, copper sulfate, chemical instruments and methods, etc., can solve the problems of large space occupation, cumbersome operation steps, difficult control of evaporation process conditions and optimal crystallization conditions, etc. Achieve the effects of saving equipment space, simplifying operation steps, and controlling concentration

Inactive Publication Date: 2014-10-08
KUNSHAN MINGKUAN ENVIRONMENTAL & ENERGY SAVING TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In the existing process, the overall operation steps are cumbersome, multiple systems need to be operated at the same time, the evaporation process conditions and optimal crystallization conditions are not easy to control, and it takes up a lot of space

Method used

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  • Device for recycling nitric acid from waste liquor containing copper nitrate and use method of device
  • Device for recycling nitric acid from waste liquor containing copper nitrate and use method of device

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Embodiment Construction

[0027] A kind of device that reclaims nitric acid from copper nitrate waste liquid, see figure 2 : It includes concentrated sulfuric acid storage tank 6, pickling waste liquid storage tank 7, the bottom outlets of concentrated sulfuric acid storage tank 6 and pickling waste liquid storage tank 7 are respectively provided with quantitative pump 17, and connected to the inner cavity of heating unit 1 On both sides, a heating wire 18 is arranged in the inner cavity of the heating unit 1, a crystallization product outlet pipe 13 is arranged at the bottom of the heating unit 1, and a retort 2, a rectification unit 3, and a retort are arranged in sequence at the upper outlet of the heating unit 1. The upper outlet of 2 is connected with the lower inlet of rectification unit 3, and the upper outlet of rectification unit 3 is externally connected to the upper inner cavity inlet of condensing unit 5, and the lower conduit of the inner cavity of condensing unit 5 is connected to the bot...

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Abstract

The invention discloses a device for recycling nitric acid from waste liquor containing copper nitrate. Repeated addition of concentrated sulphuric acid or adoption of a reverse extraction technology is not needed, cost and space occupied by equipment are saved, operation steps are simplified, resource optimization is realized, design is simple and reasonable, and control is easy. The device for recycling nitric acid from the waste liquor containing copper nitrate comprises a concentrated sulphuric acid storage tank and an acid pickling waste liquor storage tank and is characterized in that a metering pump is respectively arranged at the outlet of the bottom of each of the concentrated sulphuric acid storage tank and the acid pickling waste liquor storage tank and is respectively communicated to the inner cavity of a heating unit, a heating wire is arranged in the inner cavity of the heating unit, a crystal outlet pipeline is arranged at the bottom of the heating unit, a distillation flask and a rectifying unit are sequentially arranged at the outlet in the upper part of the heating unit, the outlet in the upper part of the distillation flask is communicated with the inlet in the lower part of the rectifying unit, the outlet in the upper part of the rectifying unit is externally connected with an inner cavity inlet in the upper part of a condensation unit, an inner cavity outlet in the lower part of the condensation unit is connected to the lower part of a nitric acid finished product tank by virtue of a guide pipe, and flowing cold water is filled in the outer cavity of the condensation unit.

Description

technical field [0001] The invention relates to the technical field of waste liquid recovery, in particular to a device for recovering nitric acid from copper nitrate-containing waste liquid, and the invention also provides a method for using the device. Background technique [0002] Plating parts deplating waste solution is one of the most important sources of wastewater in electroplating wastewater, accounting for more than 80% of the total discharge of production wastewater. Copper-containing deplating waste solution is one of the plating parts deplating cleaning wastewater. When deplating, the copper on the surface of the plated parts is pickled and dissolved with nitric acid. As the pickling process proceeds, when the copper ions reach a certain concentration, the pickling solution loses its pickling ability and becomes a waste solution. Under the strict monitoring of the existing national discharge standards for the electroplating industry, the deplating waste solution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/46C01G3/10C02F1/04C02F1/58
Inventor 陈时全张瑞辰
Owner KUNSHAN MINGKUAN ENVIRONMENTAL & ENERGY SAVING TECH CO LTD
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