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Wet phosphoric acid production system and wet phosphoric acid production method

A wet-process phosphoric acid and production system technology, applied in the chemical industry, can solve the problems of fouling and clogging of filters and related pipelines, and achieve the effects of reducing the labor intensity of cleaning, saving maintenance costs, and reducing the number of cleanings.

Active Publication Date: 2017-06-23
胡士清
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a wet-process phosphoric acid production system, which can effectively solve the problem of fouling and clogging of filters and related pipelines during the production of wet-process phosphoric acid

Method used

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  • Wet phosphoric acid production system and wet phosphoric acid production method
  • Wet phosphoric acid production system and wet phosphoric acid production method

Examples

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no. 1 example

[0031] Please refer to figure 1 , this embodiment provides a wet-process phosphoric acid production system 100 . The wet-process phosphoric acid production system 100 includes mineral material conveying equipment 110, a pulp storage tank 115, a pulp thickening tank 116, a pulp high level tank 117, an extraction tank 118, a slurry thickening tank 119, a phosphoric acid clarification tank 120, a phosphoric acid storage tank 130, a Slurry dilution tank 140, filter cleaning equipment 150 and return acid thickening tank 170.

[0032]Specifically, the discharge port of the mineral material conveying equipment 110 is connected to the feed port of the pulp storage tank 115, the discharge port of the pulp storage tank 115 is connected to the feed port of the pulp thick tank 116, and the discharge port of the pulp thick tank 116 Connected to the feed port of the slurry header tank 117, the discharge port of the slurry header tank 117 is connected to the feed port of the extraction tank...

no. 2 example

[0061] This embodiment provides a method for producing wet-process phosphoric acid. Phosphoric acid is produced using the wet-process phosphoric acid production system 100 in the first embodiment.

[0062] Please refer to the specific process flow chart figure 2 Firstly, the mineral material enters the slurry storage tank 115 after being crushed and ball milled and screened. Then it is transported to the extraction tank 118 through the pulp thickening tank 116 and the high level tank 117 of the pulp, and then through the slurry thickening tank 119, and a part of the clear liquid is transported to the phosphoric acid storage tank 130 through the phosphoric acid clarification tank 120; the remaining thick pulp is transported through the thick pulp dilution tank 140 After being filtered and cleaned by the filter cleaning equipment 150, it is sent back to the acid thickening tank 170 for recycling again. In the whole production method, the filtration and cleaning equipment 150 ...

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Abstract

The invention relates to the field of chemical engineering, and particularly discloses a wet phosphoric acid production system and a wet phosphoric acid production method. The wet phosphoric acid production system comprises mineral aggregate conveying equipment, an ore pulp storage tank, an ore pulp thickening tank, an ore pulp overhead tank, an extraction tank, a slurry thickening tank, a phosphoric acid clarification tank and a phosphoric acid storage tank. A thick slurry outlet of the slurry thickening tank is communicated to a material inlet of a thick slurry diluting tank, so that filtering and cleaning equipment does not participate in filtering of phosphoric acid stock solution, and only filters diluted slurry separated through a slurry thickener. The problems of scaling and blockage of a filter and relevant pipelines are effectively solved. By process optimization, the production efficiency is greatly improved, and the equipment utilization rate is increased; the production unit production of a product can be reduced. The wet phosphoric acid production method makes use of the wet phosphoric acid production system, so that during wet phosphoric acid production, the production efficiency is high.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a wet-process phosphoric acid production system and a wet-process phosphoric acid production method. Background technique [0002] my country's phosphorus chemical industry represented by calcium hydrogen phosphate and ammonium phosphate has always had a technical problem that has plagued the entire industry in the production of wet-process phosphoric acid. Scaling and clogging of filters and related pipes. [0003] In the traditional wet-process phosphoric acid production process, fouling and blockage are mainly manifested in the filter link; such as filter cloth, filter area, first washing area, vacuum pipe, vacuum tank and other positions. The reason for the analysis is related to the content of main harmful impurities (Fe, Al, Mg, K, Na) in phosphate rock, to the process index, to the temperature difference during filtration, to the mechanism and surface finish of the filter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/22
CPCC01B25/22
Inventor 胡士清
Owner 胡士清
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