Ternary precursor wastewater oil removal system and process method thereof

Abstract

The invention discloses a ternary precursor wastewater oil removal system and a process method thereof, the ternary precursor wastewater oil removal system comprises: a pump comprising an inlet and anoutlet; an activated carbon tank provided with a first liquid inlet and a first liquid outlet, wherein the first liquid inlet of the activated carbon tank is connected with an outlet of the pump through a first pipeline, the first pipeline is provided with a first valve, and the activated carbon tank is filled with activated carbon; and a filter comprising a second liquid inlet and a second liquid outlet, wherein the second liquid inlet of the filter is connected with the first liquid outlet of the activated carbon canister through a first pipeline, the second liquid inlet of the filter is connected with the outlet of the pump through a second pipeline, a second valve is arranged on the second pipeline, and the second liquid outlet of the filter is connected with a MVR evaporator. The system provided by the invention can remove oil in feed liquid entering the MVR evaporator, improves the quality of discharged salt, and ensures long-term stable operation of the system.

Description

technical field [0001] The invention relates to the technical field of oil-water separation, in particular to a system for removing oil from ternary precursor wastewater and a process method thereof. Background technique [0002] In recent years, the coverage of ternary lithium batteries has grown rapidly with the expansion of my country's new energy market, which has driven the rapid growth of demand for cobalt, nickel and other related metal raw materials. As a result, the economic benefits of waste battery recycling have become increasingly prominent, and the corresponding waste batteries The demand market for wastewater treatment is also expanding. [0003] During the recycling process of waste batteries, extractants such as P507 and P203 are introduced, which are not only difficult to separate when dissolved in water, but also have oil that is difficult to remove on the surface of the waste water generated by recycling. During the operation of the MVR evaporator, the eva...

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Problems solved by technology

[0003] During the recycling process of waste batteries, extractants such as P507 and P203 are introduced, which are not only difficult to separate when dissolved in water, but also have oil that is difficult to remove on the surface of the waste water generated by recycling. During the operation of the MVR evaporator, the evaporation temperature of the system rises , the crystallization effect is poor, and the gas-liquid separation effect is poor, which will eventually lead to a decrease in the quality of the salt output. Long-term operation will affect the stability of the entire system, and there is a great potential safety hazard.

[0004] The existing degreasing process has the following defects: 1. Various types of filter materials are involved in the use process, and the use cost is high; when the filter material used reaches the service life, it will become waste material itself, which is difficult to handle and increases operating costs; 2. , The structure of the equipment involved in the use process is too complicated, the design cost is high, and the floor area is large, and the energy consumption is high

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