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Filtering and heating device for extracting iodine from wet process phosphoric acid and operation method thereof

A wet-process phosphoric acid and heating device technology, applied in the field of filtration, can solve the problems of unfavorable iodine finishing and downstream product application, low iodine mass fraction, etc., to avoid iodine loss and corrosion of equipment, improve mass fraction, overcome operation effect of difficulty

Inactive Publication Date: 2013-06-26
WENGFU (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current vacuum filtration process separation does not consider heating the air entering the filter box, so that the mass fraction of iodine in the crude iodine product obtained after the filtration separation is completed is relatively low, and the iodine content can only reach an average of about 92%. When the ambient temperature is lower than 3°C, the difficulty of operation increases and the iodine content of the product is lower, which is not conducive to the finishing of iodine and the application of downstream products

Method used

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  • Filtering and heating device for extracting iodine from wet process phosphoric acid and operation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] The concentration of iodine in the absorption solution before iodine analysis is 50g / l, and the volume of the absorption solution is 10m 3 , The total mass of iodine (theoretical calculation) is 500kg. Adopted device of the present invention:

[0018] (1) A cover plate 2 is provided on the top of the filter box 1 to support the air heater 4 and seal the filter box 1;

[0019] (2) Make a hole on the cover plate 2, the size of the hole matches the heating surface of the air heater 4, so that the hot air from the air heater 4 can be blown into the filter box 1 smoothly; the heaters used are two PTC ceramic heaters , model: NSB-200, power 2200W, with natural wind, I and II gear hot air and wind direction variable function; the above air heater is installed horizontally;

[0020] (3) Open a small hole on the cover plate 2 and install a glass tube thermometer 3 with a range of 0-100°C to monitor the air temperature in the filter box.

[0021] During operation, at the initi...

Embodiment 2

[0024] The concentration of iodine in the absorption solution before iodine analysis is 60g / l, and the volume of the absorption solution is 10m 3 , the total mass of iodine (theoretical calculation) is 600kg;

[0025] (1) A cover plate 2 is provided on the top of the filter box 1 to support the air heater 4 and seal the filter box 1;

[0026] (2) Make a hole on the cover plate 2, the size of the hole matches the heating surface of the air heater 4, so that the hot air from the air heater 4 can be blown into the filter box 1 smoothly; the heaters used are two PTC ceramic heaters , model: NSB-200, power 2200W, with natural wind, I and II gear hot air and wind direction variable function; the above air heater is installed horizontally;

[0027] (3) Open a small hole on the cover plate 2 and install a glass tube thermometer 3 with a range of 0-100°C to monitor the air temperature in the filter box.

[0028] During operation, at the initial stage of filtration, use two heaters t...

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Abstract

The invention discloses a filtering and heating device for extracting iodine from wet process phosphoric acid and an operation method thereof. The device is as follows: a cover plate (2) is arranged at the top of a filter box (1), a hole is simultaneously formed in the cover plate (2), and the size of the hole is matched with the heating surface of an air heater (4); and in addition, a small hole is formed in the cover plate (2) for mounting a glass tube thermometer (3) with the range from 0 to 100 DEG C, and the glass tube thermometer (3) is used for monitoring the temperature of air in the filter box (1). The device can fast dry, evaporate and separate water in an iodine and water mixture by adding the hot air into the filter box, so that the effect of improving the mass fraction of the iodine in a crude iodine product can be further achieved.

Description

technical field [0001] The invention relates to filtration, in particular to a filtration heating device for extracting iodine in wet-process phosphoric acid production and an operating method thereof. Background technique [0002] Extracting iodine from phosphate rock is mainly carried out by using phosphoric acid produced from phosphate rock as raw material. In the process of producing phosphoric acid from phosphate rock, iodine as an associated ore enters phosphoric acid in the form of ions, and can be removed in molecular form after adding chemicals. Phosphoric acid is separated from phosphoric acid, and then the phosphoric acid containing molecular iodine is pumped into the extraction tower. Using its physical and chemical properties, it is extracted in the extraction tower by adding an extractant, and then absorbed by the absorption liquid cycle. After reaching a certain concentration, it will be absorbed The solution was transferred to the iodine analysis tank for cry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/14
Inventor 覃礼云郑周勋
Owner WENGFU (GRP) CO LTD