CN111995096A - Ternary precursor wastewater oil removal system and process method thereof - Google Patents

Abstract

The invention discloses a ternary precursor wastewater oil removal system and a process method thereof, wherein the ternary precursor wastewater oil removal system comprises the following steps: a pump comprising an inlet and an outlet; the activated carbon tank is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet of the activated carbon tank is connected with the outlet of the pump through a first pipeline, the first pipeline is provided with a first valve, and activated carbon is filled in the activated carbon tank; the filter, the filter includes second inlet and second liquid outlet, and the first liquid outlet of first pipe connection active carbon jar is passed through to the second inlet of filter, and the export of second pipe connection pump is passed through to the second inlet of filter, is provided with the second valve on the second pipeline, and the MVR evaporimeter is connected to the second liquid outlet of filter. The system can remove oil in feed liquid entering the MVR evaporator, improve the salt yielding quality and ensure the long-term stable operation of the system.

Description

A system for removing oil from ternary precursor waste water and its process method

technical field

The invention relates to the technical field of oil-water separation, in particular to a system for removing oil from ternary precursor waste water and a process method thereof.

Background technique

In recent years, the coverage rate of ternary lithium batteries has grown rapidly with the expansion of my country's new energy market, driving the rapid growth of demand for related metal raw materials such as cobalt and nickel. As a result, the economic benefits of recycling waste batteries have become increasingly prominent, and the corresponding waste batteries The demand market for wastewater treatment is also expanding.

In the process of recycling waste batteries, P507, P203 and other extractants are introduced, which are not only difficult to separate when dissolved in water, but also there is oil that is difficult to remove on the surface of the recycled wastewater. During the operation of the MVR evaporator, the evaporation temperature of the system increases. , the crystallization effect is poor, and the gas-liquid separation effect is poor, which will eventually lead to the decline of the salt quality.

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

SUMMARY OF THE INVENTION

The purpose of the present invention is to aim at the deficiencies in the prior art, to provide a ternary precursor waste water degreasing system and a process method thereof, the system can remove the oil entering the MVR evaporator feed liquid, improve the quality of salt production, To ensure long-term stable operation of the system.

For realizing the above-mentioned purpose, the technical scheme that the present invention takes is:

A first aspect of the present invention provides a system for removing oil from ternary precursor waste water, comprising:

Pumps, including inlet and outlet;

Activated carbon canister, the activated carbon canister is provided with a first liquid inlet and a first liquid outlet, the first liquid inlet of the activated carbon canister is connected to the outlet of the pump through a first pipeline, and the first pipeline is connected to the pump outlet. A first valve is provided, and the activated carbon canister is filled with activated carbon;

A filter, the filter is provided with a second liquid inlet and a second liquid outlet, and the second liquid inlet of the filter is connected to the first liquid outlet of the activated carbon tank through the first pipeline, The second liquid inlet of the filter is connected to the outlet of the pump through a second pipeline, the second pipeline is provided with a second valve, and the second liquid outlet of the filter is connected to the MVR evaporator.

Preferably, it also includes a third pipeline, through which the first liquid outlet of the activated carbon tank and the third liquid outlet of the filter both discharge the feed liquid to the oil removal system, and the third pipeline A third valve is provided.

Preferably, the activated carbon canister is made of non-metallic materials.

Preferably, the first liquid inlet is located at the top of the activated carbon canister, the first liquid outlet is located at the bottom of the activated carbon canister, between the first liquid inlet and the first liquid outlet and located at the bottom of the activated carbon canister The activated carbon canister is filled with the activated carbon.

The second aspect of the present invention provides the process method for a ternary precursor waste water oil removal system, comprising the following steps: opening the first valve, closing the second valve at the same time, and transferring the oil-containing material liquid from the pump It is transported to the activated carbon tank through the first pipeline, and the activated carbon in the activated carbon tank absorbs the oil in the feed liquid, and the feed liquid after the adsorption of the oil content enters the filter through the first pipeline. The filter removes solid impurities in the feed liquid, and the feed liquid after impurity removal enters the MVR evaporator.

Preferably, when the oil removal system stops or fails, the first valve, the second valve and the third valve are opened at the same time, and the feed liquid in the oil removal system is discharged from the oil removal system through the third pipeline. outside.

Preferably, the specific filling process of the activated carbon is as follows: firstly, the quartz sand is filled as a cushion layer, and then the activated carbon is filled, and the activated carbon is washed three times with water before filling.

The present invention adopts the above technical scheme, compared with the prior art, has the following technical effects:

The degreasing process filter material of the present invention only uses activated carbon, has a single type, not only is cheaper than resin, but also has high mechanical strength, developed pore structure, large specific surface area, fast adsorption speed, high adsorption capacity, durability, and reduced use costs. Activated carbon that has reached its service life can be buried in place, and can be used as soil waste after decomposition, saving energy and environmental protection, or as a fuel for fresh steam production; using activated carbon canister (non-metallic) and filter, simple structure, low-cost materials, and reduced processing costs, At the same time, a single activated carbon canister (non-metallic) and filter are used, which has a small footprint and low energy consumption for system operation.

Description of drawings

1 is a schematic diagram of a ternary precursor waste water degreasing system in Example 1 of the present invention;

2 is a schematic diagram of a ternary precursor waste water degreasing system in Example 2 of the present invention;

The reference numerals therein are:

1-pump; 11-inlet; 12-outlet; 2-activated carbon tank; 21-first liquid inlet; 22-first liquid outlet; 23-first pipeline; 24-first valve; 25-activated carbon; 3 -filter; 31-second liquid inlet; 32-second liquid outlet; 33-second pipeline; 34-second valve; 35-third liquid outlet; 4-third pipeline; 5-third valve.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

As shown in FIG. 1 , the present invention discloses a ternary precursor waste water degreasing system, comprising: a pump 1, the pump 1 includes an inlet 11 and an outlet 12; an activated carbon canister 2, and a first inlet The liquid port 21 and the first liquid outlet 22, the first liquid inlet 21 of the activated carbon canister 2 is connected to the outlet 12 of the pump 1 through a first pipeline 23, and a first valve 24 is provided on the first pipeline 23. Filled with activated carbon 25; filter 3, the filter 3 is provided with a second liquid inlet 31 and a second liquid outlet 32, the second liquid inlet 31 of the filter 3 is connected to the second liquid inlet of the activated carbon tank 2 through the first pipeline 23. A liquid outlet 22, the second liquid inlet 31 of the filter 3 is connected to the outlet 12 of the pump 1 through a second pipe 33, the second pipe 33 is provided with a second valve 34, and the second liquid outlet 32 of the filter 3 Connect the MVR evaporator.

As a preferred embodiment, it also includes a third pipeline 4. The first liquid outlet 22 of the activated carbon canister 2 and the third liquid outlet 35 of the filter 3 both discharge the material and liquid through the third pipeline 4 except the oil removal system. A third valve 5 is provided on the three pipes 4 .

As a preferred embodiment, the activated carbon canister 2 is made of non-metallic material, preferably PPH material.

As a preferred embodiment, the first liquid inlet 21 is located at the top of the activated carbon canister 2, the first liquid outlet 22 is located at the bottom of the activated carbon canister 2, between the first liquid inlet 21 and the first liquid outlet 22 and located in the activated carbon The tank 2 is filled with activated carbon 25 .

As a preferred embodiment, the specific filling process of the activated carbon 25 is as follows: first fill the quartz sand as a cushion, then fill the activated carbon 25, and the activated carbon 25 is washed with water for 3 times before filling, so as to prevent the surface impurities from fouling the activated carbon 25, causing removal of the activated carbon 25. Oil is ineffective.

It should be noted that the filter 3 is any filter device in the prior art that can filter solid impurities.

The above-mentioned process method for the ternary precursor waste water degreasing system, comprising the following steps:

Open the first valve 24 and close the second valve 34 at the same time, the oil-containing material liquid is transported from the pump 1 to the activated carbon tank 2 through the first pipeline 23, and the activated carbon 25 in the activated carbon tank 2 absorbs the oil in the material liquid. The feed liquid of the oil enters the filter 3 through the first pipeline 23, the filter 3 removes the solid impurities in the feed liquid, and the feed liquid after removal of impurities enters the MVR evaporator;

The first valve 24 is closed, and the second valve 34 is opened at the same time, and the oil-free material liquid is transported from the pump 1 to the filter 3 through the second pipeline 33. The filter 3 removes the solid impurities in the material liquid, and the material liquid after removal of impurities into the MVR evaporator.

As a preferred embodiment, when the oil removal system stops or fails, the first valve 24 , the second valve 34 and the third valve 5 are opened at the same time, and the feed liquid in the oil removal system is discharged through the third pipeline 4 to remove oil outside the system.

Example 1

As shown in FIG. 1, a system for removing oil from ternary precursor waste water includes: a pump 1, which includes an inlet 11 and an outlet 12; an activated carbon tank 2, which is provided with a first liquid inlet 21 and an outlet 12; The first liquid outlet 22, the first liquid inlet 21 of the activated carbon canister 2 is connected to the outlet 12 of the pump 1 through a first pipeline 23, the first pipeline 23 is provided with a first valve 24, and the activated carbon canister 2 is filled with activated carbon 25 Filter 3, the filter 3 is provided with the second liquid inlet 31 and the second liquid outlet 32, the second liquid inlet 31 of the filter 3 is connected to the first liquid outlet of the activated carbon tank 2 through the first pipeline 23 22. The second liquid inlet 31 of the filter 3 is connected to the outlet 12 of the pump 1 through a second pipeline 33, a second valve 34 is provided on the second pipeline 33, and the second liquid outlet 32 of the filter 3 is connected to the MVR evaporator .

As a preferred embodiment, the activated carbon canister 2 is made of non-metallic materials.

As a preferred embodiment, the first liquid inlet 21 is located at the top of the activated carbon canister 2, the first liquid outlet 22 is located at the bottom of the activated carbon canister 2, between the first liquid inlet 21 and the first liquid outlet 22 and located in the activated carbon The tank 2 is filled with activated carbon 25 .

The above-mentioned process method for the ternary precursor waste water degreasing system, comprising the following steps:

Open the first valve 24 and close the second valve 34 at the same time, the oil-containing material liquid is transported from the pump 1 to the activated carbon tank 2 through the first pipeline 23, and the activated carbon 25 in the activated carbon tank 2 absorbs the oil in the material liquid. The feed liquid of the oil enters the filter 3 through the first pipeline 23, the filter 3 removes the solid impurities in the feed liquid, and the feed liquid after removal of impurities enters the MVR evaporator;

The first valve 24 is closed, and the second valve 34 is opened at the same time, and the oil-free material liquid is transported from the pump 1 to the filter 3 through the second pipeline 33. The filter 3 removes the solid impurities in the material liquid, and the material liquid after removal of impurities into the MVR evaporator.

Example 2

As shown in Figure 2, a system for removing oil from ternary precursor waste water includes: a pump 1, which includes an inlet 11 and an outlet 12; an activated carbon tank 2, which is provided with a first liquid inlet 21 and an outlet 12; The first liquid outlet 22, the first liquid inlet 21 of the activated carbon canister 2 is connected to the outlet 12 of the pump 1 through a first pipeline 23, the first pipeline 23 is provided with a first valve 24, and the activated carbon canister 2 is filled with activated carbon 25 Filter 3, the filter 3 is provided with the second liquid inlet 31 and the second liquid outlet 32, the second liquid inlet 31 of the filter 3 is connected to the first liquid outlet of the activated carbon tank 2 through the first pipeline 23 22. The second liquid inlet 31 of the filter 3 is connected to the outlet 12 of the pump 1 through a second pipeline 33, a second valve 34 is provided on the second pipeline 33, and the second liquid outlet 32 of the filter 3 is connected to the MVR evaporator . It also includes a third pipeline 4. The first liquid outlet 22 of the activated carbon tank 2 and the third liquid outlet 35 of the filter 3 both discharge the material and liquid through the third pipeline 4 to the oil removal system. The third pipeline 4 is provided with The third valve 5 .

As a preferred embodiment, the activated carbon canister 2 is made of non-metallic materials.

As a preferred embodiment, the first liquid inlet 21 is located at the top of the activated carbon canister 2, the first liquid outlet 22 is located at the bottom of the activated carbon canister 2, between the first liquid inlet 21 and the first liquid outlet 22 and located in the activated carbon The tank 2 is filled with activated carbon 25 .

The above-mentioned process method for the ternary precursor waste water degreasing system, comprising the following steps:

Open the first valve 24 and close the second valve 34 at the same time, the oil-containing material liquid is transported from the pump 1 to the activated carbon tank 2 through the first pipeline 23, and the activated carbon 25 in the activated carbon tank 2 absorbs the oil in the material liquid. The feed liquid of the oil enters the filter 3 through the first pipeline 23, the filter 3 removes the solid impurities in the feed liquid, and the feed liquid after removal of impurities enters the MVR evaporator;

The first valve 24 is closed, and the second valve 34 is opened at the same time, and the oil-free material liquid is transported from the pump 1 to the filter 3 through the second pipeline 33. The filter 3 removes the solid impurities in the material liquid, and the material liquid after removal of impurities into the MVR evaporator.

When the oil removal system stops or fails, the first valve 24 , the second valve 34 and the third valve 5 are opened at the same time, and the feed liquid in the oil removal system is discharged from the oil removal system through the third pipeline 4 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the embodiments and protection scope of the present invention. For those skilled in the art, they should be aware of the equivalent replacements and obvious changes made by using the contents of the description of the present invention. The solutions obtained by the changes of the above should be included in the protection scope of the present invention.

Claims (7)

1. for a ternary precursor waste water degreasing system, is characterized in that, comprises: a pump (1), comprising an inlet (11) and an outlet (12); An activated carbon canister (2), the activated carbon canister (2) is provided with a first liquid inlet (21) and a first liquid outlet (22), and the activated carbon canister (2) has a first liquid inlet (21) The outlet (12) of the pump (1) is connected through a first pipeline (23), a first valve (24) is arranged on the first pipeline (23), and the activated carbon canister (2) is filled with activated carbon (25); A filter (3), the filter (3) is provided with a second liquid inlet (31) and a second liquid outlet (32), and the filter (3) has a second liquid inlet (31) The first liquid outlet (22) of the activated carbon canister (2) is connected through the first pipeline (23), and the second liquid inlet (31) of the filter (3) is connected through the second pipeline (33) The outlet (12) of the pump (1) is connected, the second pipe (33) is provided with a second valve (34), and the second liquid outlet (32) of the filter (3) is connected to the MVR evaporation device. 2 . The oil removal system for ternary precursor waste water according to claim 1 , further comprising a third pipeline ( 4 ), the first liquid outlet ( 22 ) of the activated carbon tank ( 2 ) and the The third liquid outlet (35) of the filter (3) discharges the material liquid from the oil removal system through the third pipeline (4), and the third pipeline (4) is provided with a third valve (5) . 3 . The oil removal system for ternary precursor waste water according to claim 1 , wherein the activated carbon tank ( 2 ) is made of non-metallic materials. 4 . 4. The oil removal system for ternary precursor waste water according to claim 1, wherein the first liquid inlet (21) is located at the top of the activated carbon tank (2), and the first outlet (21) is located at the top of the activated carbon tank (2). The liquid port (22) is located at the bottom of the activated carbon canister (2), the first liquid inlet (21) and the first liquid outlet (22) are located between the first liquid inlet (21) and the first liquid outlet (22) and the activated carbon canister (2) is filled with the Activated carbon (25). 5. The process method for a ternary precursor waste water degreasing system according to any one of claims 1-4, characterized in that it comprises the steps of: opening the first valve (24) and simultaneously closing the The second valve (34) transports the oil-containing liquid from the pump (1) through the first pipeline (23) to the activated carbon tank (2), and the activated carbon (2) in the activated carbon tank (2) 25) Absorb the oil in the feed liquid, and the feed liquid after adsorbing the oil content enters the filter (3) through the first pipeline (23), and the filter (3) removes the solid impurities in the feed liquid, The impurity-removed feed liquid enters the MVR evaporator. 6. The process method for a ternary precursor waste water degreasing system according to claim 5, characterized in that, when the degreasing system is shut down or fails, the first valve (24), the first valve (24), the first valve (24), the first valve (24), the second The second valve (34) and the third valve (5) discharge the feed liquid in the oil removal system out of the oil removal system through the third pipeline (4). 7. The process method for a ternary precursor waste water degreasing system according to claim 5, wherein the specific filling process of the activated carbon (25) is: first fill with quartz sand to make a cushion, and then fill with activated carbon (25), the activated carbon (25) is washed three times with water and then loaded.

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