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Apparatus for recycling iodine from dilute phosphoric acid

A technology for recovering iodine and dilute phosphoric acid, which is applied in the direction of iodine, phosphorus compounds, iodine/hydrogen iodide, etc., and can solve problems such as clogging production pipelines and equipment

Active Publication Date: 2017-10-20
贵州开磷碘业有限责任公司
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Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a device for recovering iodine from dilute phosphoric acid, which can continuously and efficiently extract iodine from iodine-containing dilute phosphoric acid. Clean the equipment regularly to effectively solve the problem of crystallization of phosphogypsum in the production unit and blockage of production pipelines and equipment

Method used

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  • Apparatus for recycling iodine from dilute phosphoric acid

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Embodiment

[0026] As mentioned above, when the device is in operation, the iodine-containing acid liquid discharged from the acid tank 1 enters the reactor 2 in a double-pipeline manner, and the two outlet pipes of the reactor 2 enter the separation tower A3 and the separation tower B4 respectively, and the acid is discharged from the separation tower The outlet pipe enters the phosphoric acid tank 6, and the outlet of the phosphoric acid tank 6 also uses double pipelines to drive the acid into the concentrator 11. Both the reactor 2 and the phosphoric acid tank 6 need to be equipped with corresponding bypass pipelines, connect the inlet pipe to the outlet pipe, and configure corresponding After the recovery of the valve is completed, it enters the cleaning work. The cleaning pump 12 sends the cleaning liquid from the cleaning tank 10 through the acid that is not in production state, bypasses the reactor 2 through the fourth bypass line, and enters the separation tower to be cleaned. Afte...

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Abstract

The invention provides apparatus for recycling iodine from dilute phosphoric acid. The device comprises an acid preparing tank, a reactor, a separation tower A, a separation tower B, an absorber, a phosphoric acid tank, an acid pump A, an acid pump B, a cleaning tank, a concentrator and a cleaning pump. According to the invention, production and cleaning work are alternately performed by using double blow-out towers, iodine can be continuously and efficiently extracted from an iodine-containing dilute phosphoric acid, the apparatus is circularly cleaned by a cleaning liquid at regular or irregular intervals, the problem that production pipes and devices are blocked by crystallization and precipitation of ardealite in the production apparatus is effectively solved, and the apparatus is suitable for iodine recycling that the iodine is extracted from the dilute phosphoric acid which is obtained by decomposition of rock phosphates by a sulfuric acid method.

Description

technical field [0001] The invention relates to a device for recovering iodine from dilute phosphoric acid, which belongs to the field of chemical equipment. Background technique [0002] Iodine is extremely important to the life of animals and plants. Iodine is used in many places in industrial production and daily life; however, as a scarce resource, the production of iodine has been difficult to meet market demand. Phosphate rocks contain 30-200ppm of iodine, which makes the technology of extracting iodine from phosphate rocks a focus of research in recent years. Many companies have mastered the process of extracting iodine from phosphate rocks in industrial production through long-term experiments. technology. For the technology of using sulfuric acid to decompose phosphate rock to extract iodine, phosphogypsum is easy to crystallize in pipelines and main equipment. After a period of operation, the iodine recovery device has to be shut down for cleaning. The phosphogyps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/14C01B25/222
CPCC01B7/14C01B25/222Y02P20/10
Inventor 陈彬罗旭钱丹杨尚达
Owner 贵州开磷碘业有限责任公司
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