Device and method for removing impurities and oil of ammonium bicarbonate solution

Abstract

The invention discloses a device for removing impurities and oil of an ammonium bicarbonate solution. The device comprises a raw liquid trough, a raw liquid pump, a fiber ball filter and a clear liquid trough which are connected sequentially through pipelines, wherein a basket-type filter is arranged on one pipeline between the raw liquid trough and the raw liquid pump, an electromagnetic flowmeter is arranged on one pipeline between the raw liquid pump and the fiber ball filter, and the raw liquid trough is provided with a level gauge; a backwash water storage tank is connected with a backwash water pump through a pipeline, the backwash water pump is connected with a backwash water inlet valve of the fiber ball filter through a pipeline, and the fiber ball filter is provided with a differential pressure switch; and the differential pressure switch is used for providing a pressure difference value through pressure gauges at two places including a raw liquid water inlet valve and a filtrate outlet valve, and the clear liquid trough is provided with a clear liquid storage trough level gauge. The invention also discloses a method for removing impurities and oil of the ammonium bicarbonate solution. Through the device and method, it is ensured that filtration and device cleaning can be achieved in a closed environment, and the processing capability and automation degree of the device can be improved.

Description

technical field [0001] The invention relates to a treatment technology for ammonium bicarbonate solution, in particular to a device and method for removing impurities and oil from ammonium bicarbonate solution. Background technique [0002] Ammonium bicarbonate (hereinafter referred to as ammonium bicarbonate) is a precipitant commonly used in the industrial production of rare earth carbonates, and is generally used as a solution prepared with water. In the production process of industrial ammonium bicarbonate, in order to prevent agglomeration, polymer organic active agent (hereinafter referred to as oil) will be added in a certain proportion. It directly or indirectly affects the product quality of rare earth carbonate, so the ammonium bicarbonate solution used in the rare earth industry must be filtered to remove the above three substances as much as possible. [0003] Such as figure 1 Shown is the working flow diagram of the ammonium bicarbonate solution impurity and o...

AI Technical Summary

Problems solved by technology

[0005] a. The filter press and the degreasing tank are non-airtight equipment, and the ammonia odor decomposed and volatilized when filtering the ammonium bicarbonate solution permeates the air, resulting in a bad working environment

[0006] b. The filter cloth of the filter press and the cushion layer of the oil removal tank are disassembled manually, the operating environment is poor, and the labor cost is high

[0007] c. The polymeric organic active agent in the ammonium bicarbonate is trapped in the fiber gap and surface of the filter cloth, and the polymeric organic active agent on the surface of the filter cloth can only be manually shoveled before continuing to use. The regenerated filter cloth is severely hardened, and the filter cloth The service life is short, frequent replacement is required, and the labor intensity of workers is high

[0008] d. In order to ensure the filtering effect, the ammonium bicarbonate solution flows through the three cushions of the degreasing tank in the form of natural filtration, and the flow rate is small, which cannot meet the processing needs of large quantities of solutions

[0009] e. It is difficult to realize automatic control of process equipment

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