Automatic iron phosphate production device and method thereof

Abstract

The invention relates to the technical field of iron phosphate production, in particular to an automatic iron phosphate production device and a method thereof. The device comprises a phosphorus salt dissolving tank, an iron salt dissolving tank, a hydrogen peroxide metering tank, a reaction kettle provided with a first pH meter, a first filter press, a dispersion kettle, a primary aging kettle provided with a first thermometer, a secondary aging kettle provided with a second pH meter and a second thermometer, and a second filter press, and all processes of reaction, filtering and washing, aging, dispersing, drying and the like are controlled by a DCS control system, phosphorus and heat resources in the secondary washing liquid and the secondary mother liquid can be recycled, the technicalrequirements of a newly developed complicated iron phosphate synthesis process and energy conservation and consumption reduction can be met, automatic production of a new process and automatic monitoring of a production process can be realized, and reduction of the production cost and improvement of the production efficiency are facilitated.

Description

technical field [0001] The invention relates to the technical field of ferric phosphate production, more specifically, to an automatic production device and production method of ferric phosphate. Background technique [0002] At present, the mainstream ferric phosphate is a two-step synthesis of monoclinic phase ferric phosphate dihydrate and a one-step or two-step process to generate basic ferric ammonium phosphate products, and then enters the kiln for dehydration to obtain anhydrous ferric phosphate. With the downstream lithium iron phosphate With the further improvement of the performance requirements of iron phosphate, the iron phosphate synthesis process and detection requirements are becoming more and more complicated and diversified, and even the technical requirements of multi-step multi-stage aging process and reuse and energy saving are proposed. However, most of the current production devices rely on manual circulation and manual sampling and testing, and there a...

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Problems solved by technology

However, most of the current production devices rely on manual circulation and manual sampling and testing, and there are many shortcomings: they are only applicable to the previous mainstream simple process iron phosphate production process, and the production requirements cannot keep up with the newly developed complex iron phosphate production process, such as the current process A multi-step secondary aging process has been proposed, as well as the reuse of phosphorus, ammonia resources and heat resources in wastewater. The current production equipment is difficult to meet and adapt to the newly developed process and technical requirements; High dependence and low degree of automation are not conducive to improving production efficiency and increasing production costs, and manual detection has delays and increases the instability of non-detection data, which is not conducive to production control and product quality improvement

Although the above method can use cheap raw materials to produce battery-grade iron orthophosphate, its production process cannot meet the production needs of complex iron phosphate, and requires a lot of manpower, which is not conducive to production control

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