System and method for efficiently and continuously producing anhydrous iron phosphate

Abstract

The invention relates to a system for efficiently and continuously producing anhydrous iron phosphate. The system comprises an arch breaking feeding barrel, a rotary flash evaporation dryer and a gas type rotary roasting furnace. A feeding screw is arranged at the bottom of the arch breaking feeding barrel and is connected with the rotary flash evaporation dryer; the rotary flash evaporation dryer is connected with a bag-type dust collector and an emptying pipe; a compressed nitrogen input pipe is arranged on one side of the bag-type dust collector, the other side of the bag-type dust collector is connected with a tail gas pipe through an induced draft fan, and the bottom of the bag-type dust collector is connected with the gas type rotary roasting furnace through a rotary discharge valve; a four-way valve connected with the rotary flash evaporation dryer is arranged at the top of the gas type rotary roasting furnace, the hearth is connected with a natural gas input pipe and an air input pipe with a combustion fan, and the tail part of the hearth is connected with a cooling section; a spray cooling pipe is arranged on the outer wall of the cooling section and is connected with a cooling water supply pipe and a cooling water return pipe; and an iron phosphate output pipe is arranged at the bottom of one side of the cooling section. The invention also discloses a method for producing anhydrous iron phosphate. The product quality and yield can be improved by the provided system and method, and the cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a system and method for efficiently and continuously producing anhydrous iron phosphate. Background technique [0002] Compared with fuel cells, lithium-ion batteries are currently the main development target of the energy storage industry due to their advantages such as high energy density, long life, high rated voltage, and low self-discharge rate. However, iron phosphate has a stable structure and abundant raw materials. It is not only the precursor of lithium iron phosphate material, but also can be used alone as the positive electrode material of lithium-ion batteries. [0003] At present, for the drying and roasting of ferric phosphate dihydrate, the method of electrothermal roller kiln is still mainly used. The roller kiln is a static equipment. The material is loaded on the pallet and moves slowly. The material is heated by electric heating on the top and side. The t...

AI Technical Summary

Problems solved by technology

The roller kiln is a static equipment. The material is loaded on the pallet and moves slowly. The material is heated by electric heating on the top and side. The temperature of the surface material, in order to make the internal material reach the required temperature, it is necessary to artificially increase the heating temperature, which will increase the energy consumption, and the quality of the internal and external products is not uniform.

⑵Because the material is still, in order to make the internal material fully heated, the residence time needs to be several days, resulting in large equipment volume and low output

(3) The material tray needs to be replaced frequently under the alternating action of high and low temperature and the corrosion of the material, and the maintenance cost of the equipment is high

Images