Equipment and method for dissolving nitrate solution

A nitrate and solution technology, which is applied in the field of equipment for decomposing nitrate solution, can solve the problems of low product recovery, poor purity, and high energy consumption, and achieve the effects of simple equipment structure, reduced energy consumption, and low energy consumption

Pending Publication Date: 2017-12-12
SICHUAN SIDANENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Application Information

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Problems solved by technology

[0010] The main purpose of the present invention is to provide equipment and methods for decomposing nitrate so

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  • Equipment and method for dissolving nitrate solution
  • Equipment and method for dissolving nitrate solution

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Embodiment Construction

[0053] The present invention will be clearly and completely described below in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present invention based on these descriptions. Before the present invention is described in conjunction with the accompanying drawings, it should be pointed out that:

[0054] The technical solutions and technical features provided in each part of the present invention, including the following description, can be combined with each other under the condition of no conflict.

[0055] In addition, the embodiments of the present invention referred to in the following description are generally only some embodiments of the present invention, not all of them. Therefore, based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] About terms and unit...

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Abstract

The invention discloses equipment for dissolving a nitrate solution. Nitrate comprises nitrate ions and metal ions. The nitrate liquor is dissolved by the equipment to obtain a nitric acid solution and metallic oxides. The equipment comprises a concentration device, a calcination device and an absorption device. The concentration device is used for concentrating stock solutions, the calcination device is used for calcinating second concentrated solutions, and the absorption device is used for absorbing nitric acid in acid gases. The concentration device comprises a first filter, a second filter and an evaporation and concentration device. The ratio of filtration media of the first filter to the molecular weight is larger than or equal to interception rate of 1000 substances which is larger than or equal to 99%. The ratio of filtration media of the second filter to the molecular weight is larger than or equal to the interception rate of 100 substances which is larger than or equal to 99%. A first filtrate outlet of the first filter is communicated with a liquid inlet of the second filter. A first concentrated-solution outlet of the second filter is communicated with a liquid inlet of the evaporation and concentration device. A second concentrated-solution outlet of the evaporation and concentration device is communicated with a liquid inlet of the calcination device. An acid-gas outlet of the evaporation and concentration device is communicated with a gas inlet of the absorption device.

Description

technical field [0001] The invention relates to the technical field of nitrate solution decomposition, in particular to a device and method for decomposing nitrate solution. Background technique [0002] Magnesium nitrate solution is produced during nickel production. According to statistics, under the condition of an annual output of 10 million tons of nickel, 170,000 tons of magnesium nitrate dilute solution will be produced. Both magnesium oxide and nitric acid solution are auxiliary materials needed in the production process, so the recycling of resources can be truly realized by processing magnesium nitrate solution to obtain magnesium oxide and nitric acid solution. [0003] Traditional equipment for decomposing magnesium nitrate such as figure 1 As shown, the specific process is as follows: first, use the evaporation concentrator 4 to concentrate the stock solution, and then use the roasting device 5 to roast the concentrated stock solution to obtain magnesium oxide...

Claims

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Application Information

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IPC IPC(8): C01B21/42C01F5/06C01G51/04C01G53/04
CPCC01B21/42C01F5/06C01G51/04C01G53/04
Inventor 郭定江何志李仲恺刘超何佳遂
Owner SICHUAN SIDANENG ENVIRONMENTAL PROTECTION TECH CO LTD
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