Ternary precursor wastewater treatment device

Abstract

The utility model discloses a ternary precursor wastewater treatment device, which comprises at least one reactor, a water inlet end of the reactor is used for receiving water to be treated, and a water outlet end of the reactor is connected with an evaporator; the ozone catalyst is filled in the reactor; the gas inlet end of the ozone mixing device is connected with the gas outlet end of the ozone supply device, and the liquid inlet end and the liquid outlet end of the ozone mixing device are both connected with the reactor. According to the scheme provided by the utility model, ozone and water to be treated are subjected to mixed reaction through the reactor and the ozone catalyst, and organic pollutants in the water to be treated are degraded, so that the chemical oxygen demand of the water to be treated is reduced, the blockage of the evaporator can be reduced, and the quality of sodium sulfate obtained by evaporative crystallization is improved; ozone and water to be treated can be fully mixed through the ozone mixing device, and the degradation effect of the ozone on organic pollutants in the water to be treated can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a ternary precursor wastewater treatment device. Background Art

[0002] Ternary materials have gradually become the mainstream positive electrode materials for power lithium batteries. During the production process of ternary precursor products (nickel cobalt manganese hydroxide), a large amount of mother liquor containing heavy metals, ammonia nitrogen and sodium sulfate and washing water are generated during solid-liquid separation and filter cake washing. The existing mainstream treatment processes for this wastewater are oil removal, gas stripping ammonia recovery, and MVR (mechanical vapor recompression technology) salt evaporation. After the mother liquor after deammoniation enters the MVR system, it evaporates and crystallizes to obtain industrial by-product sodium sulfate salt crystals. At the same time, the MVR condensed water can be used where water is needed, achieving zero emission of the treatment of the ternary precursor mother liquor.

[0003] However, the COD (chemical oxygen demand) of the mother liquor is high, the evaporator is easily blocked, and the quality of the evaporated salt is not very good. If you want to obtain high-quality sodium sulfate salt, you must reduce the COD in the mother liquor as much as possible. Utility Model Content

[0004] The utility model provides a ternary precursor wastewater treatment device, which uses a reactor and an ozone catalyst to make ozone and water to be treated undergo a mixed reaction, degrades organic pollutants in the water to be treated, thereby reducing the chemical oxygen demand of the water to be treated, can reduce the blockage of the evaporator, and improve the quality of the sodium sulfate salt obtained by evaporation and crystallization; the ozone mixing device can achieve full mixing of ozone and water to be treated, which helps to improve the degradation effect of ozone on organic pollutants in the water to be treated.

[0005] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0006] The utility model provides a ternary precursor wastewater treatment device, comprising:

[0007] At least one reactor, wherein the water inlet of the reactor receives the water to be treated, and the water outlet of the reactor is connected to the evaporator;

[0008] An ozone catalyst is filled in the reactor, and the ozone catalyst is located between the water inlet and the water outlet of the reactor;

[0009] An ozone mixing device, wherein the air inlet end of the ozone mixing device is connected to the air outlet end of the ozone supply device, and the water inlet end and the water outlet end of the ozone mixing device are both connected to the reactor.

[0010] Optionally, the reactor comprises: a first reactor, a second reactor and a third reactor connected in series in sequence, the water inlet end of the first reactor receives the water to be treated, and the water outlet end of the third reactor is connected to the evaporator.

[0011] Optionally, the ozone mixing device comprises:

[0012] a first lift pump, wherein a water inlet end of the first lift pump is connected to the first reactor;

[0013] A first ozone dissolving device, wherein the air inlet end of the first ozone dissolving device is connected to the air outlet end of the ozone supply device, the water inlet end of the first ozone dissolving device is connected to the water outlet end of the first lifting pump through a first mixing water inlet pipe, and the water outlet end of the first ozone dissolving device is connected to the first reactor through a first mixing water outlet pipe.

[0014] Optionally, the ozone mixing device further comprises:

[0015] a second lift pump, wherein a water inlet end of the second lift pump is connected to the third reactor;

[0016] A second ozone dissolving device, wherein the air inlet end of the second ozone dissolving device is connected to the air outlet end of the ozone supply device, the water inlet end of the second ozone dissolving device is connected to the water outlet end of the second lifting pump through a second mixed water inlet pipe, and the water outlet end of the second ozone dissolving device is connected to the second reactor and the third reactor through a second mixed water outlet pipe.

[0017] Optionally, the ozone mixing device further comprises:

[0018] A plurality of nozzles are provided, and the plurality of nozzles are respectively arranged inside the first reactor, the second reactor and the third reactor, and are respectively connected to the first mixing water outlet pipe and the second mixing water outlet pipe.

[0019] Optionally, the wastewater treatment device further includes:

[0020] A dosing device, wherein the drug outlet end of the dosing device is connected to the first mixing water outlet pipe.

[0021] Optionally, the ozone supply device comprises:

[0022] An ozone generator, wherein an air inlet end of the ozone generator is connected to an oxygen source, and an air outlet end of the ozone generator is connected to air inlets of the first ozone dissolving device and the second ozone dissolving device.

[0023] Optionally, the breathing valves of the first reactor, the second reactor and the third reactor are connected to the ozone tail gas destructor through an exhaust pipe.

[0024] Optionally, the wastewater treatment device further includes:

[0025] A backwash fan, wherein the air outlet end of the backwash fan is connected to the first reactor, the second reactor and the third reactor through a backwash pipeline.

[0026] Optionally, two layers of hollow fiberglass supporting layers are provided inside the first reactor, the second reactor and the third reactor, and the ozone catalyst is filled between the two layers of fiberglass supporting layers.

[0027] The above solution of the utility model includes at least the following beneficial effects:

[0028] The above scheme of the utility model allows ozone to mix and react with water to be treated through a reactor and an ozone catalyst, degrading organic pollutants in the water to be treated, thereby reducing the chemical oxygen demand of the water to be treated, reducing the blockage of the evaporator, and improving the quality of the sodium sulfate salt obtained by evaporation and crystallization; the ozone mixing device can achieve full mixing of ozone and water to be treated, which helps to improve the degradation effect of ozone on organic pollutants in the water to be treated. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a ternary precursor wastewater treatment device provided in an embodiment of the utility model.

[0030] The following are the descriptions of the reference numerals:

[0031] 1. First reactor; 2. Ozone catalyst; 3. First mixed water outlet pipe; 4. Backwash fan; 5. Backwash pipeline; 6. Nozzle; 7. First lifting pump; 8. First mixed water inlet pipe; 9. First ozone dissolving device; 10. Second mixed water outlet pipe; 11. Second reactor; 12. Third reactor; 13. Second lifting pump; 14. Second mixed water inlet pipe; 15. Exhaust pipe; 16. Ozone tail gas destroyer; 17. Second ozone dissolving device; 18. Ozone generator; 19. Oxygen source; 20. Dosing device. DETAILED DESCRIPTION

[0032] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0033] like Figure 1 As shown, the utility model provides a ternary precursor wastewater treatment device, comprising:

[0034] at least one reactor, wherein the water inlet of the reactor receives the water to be treated, and the water outlet of the reactor is connected to the evaporator;

[0035] An ozone catalyst 2 is filled inside the reactor, and the ozone catalyst 2 is located between the water inlet and the water outlet of the reactor;

[0036] The ozone mixing device has an air inlet connected to an air outlet of the ozone supply device, and a water inlet and a water outlet connected to the reactor.

[0037] In this embodiment, the water to be treated enters the reactor, the ozone mixing device extracts the water to be treated in the reactor, the ozone mixing device obtains ozone from the ozone supply device, fully mixes the ozone with the water to be treated and re-sends the mixed liquid into the reactor, under the catalytic action of the ozone catalyst 2 inside the reactor, the ozone fully reacts with the water to be treated to degrade the organic pollutants in the water to be treated, thereby reducing the chemical oxygen demand of the water to be treated, and the treated water to be treated enters the evaporator for treatment to obtain sodium sulfate salt crystals; by degrading the organic pollutants in the water to be treated with ozone and reducing the chemical oxygen demand of the water to be treated, the blockage of the evaporator can be reduced, and the quality of the sodium sulfate salt obtained by evaporation and crystallization can be improved; the ozone mixing device can achieve full mixing of ozone and the water to be treated, which helps to improve the degradation effect of ozone on organic pollutants in the water to be treated;

[0038] The reactor may be in the form of a pool, a tank, etc.

[0039] In the above embodiment of the utility model, the reactor includes: a first reactor 1, a second reactor 11 and a third reactor 12 connected in series in sequence, the water inlet end of the first reactor 1 receives the water to be treated, and the water outlet end of the third reactor 12 is connected to the evaporator.

[0040] In this embodiment, the water outlet of the first reactor 1 is connected to the water inlet of the second reactor 11, and the water outlet of the second reactor 11 is connected to the water inlet of the third reactor 12. By providing the first reactor 1, the second reactor 11 and the third reactor 12 connected in series, the reaction time of ozone and the water to be treated can be increased, and the degradation effect of ozone on organic pollutants in the water to be treated can be improved;

[0041] In this embodiment, three reactors are provided. When the water to be treated is treated, the number of reactors is adjusted according to the amount of the water to be treated and the volume of the reactor to ensure the degradation effect of ozone on the organic pollutants in the water to be treated.

[0042] In an optional embodiment of the utility model, the ozone mixing device comprises:

[0043] A first lift pump 7, wherein a water inlet end of the first lift pump 7 is connected to the first reactor 1;

[0044] The first ozone dissolving device 9, the air inlet end of the first ozone dissolving device 9 is connected to the air outlet end of the ozone supply device, the water inlet end of the first ozone dissolving device 9 is connected to the water outlet end of the first lifting pump 7 through the first mixing water inlet pipe 8, and the water outlet end of the first ozone dissolving device 9 is connected to the first reactor 1 through the first mixing water outlet pipe 3.

[0045] In this embodiment, ozone from the ozone supply device enters the first ozone dissolving device 9, the first lifting pump 7 draws the water to be treated in the first reactor 1 and sends it to the first ozone dissolving device 9 through the first mixing water inlet pipe 8, the water to be treated and ozone are fully mixed in the first ozone dissolving device 9, and the mixed liquid is sent to the first reactor 1 through the first mixing water outlet pipe 3. The mixing of ozone and water to be treated in this way can make the ozone and water to be treated fully mixed, which helps to improve the degradation effect of ozone on organic pollutants in the water to be treated.

[0046] In an optional embodiment of the utility model, the ozone mixing device further includes:

[0047] a second lift pump 13, wherein a water inlet end of the second lift pump 13 is connected to the third reactor 12;

[0048] The second ozone dissolving device 17, the air inlet end of the second ozone dissolving device 17 is connected to the air outlet end of the ozone supply device, the water inlet end of the second ozone dissolving device 17 is connected to the water outlet end of the second lifting pump 13 through the second mixing water inlet pipe 14, and the water outlet end of the second ozone dissolving device 17 is connected to the second reactor 11 and the third reactor 12 through the second mixing water outlet pipe 10.

[0049] In this embodiment, ozone from the ozone supply device enters the second ozone dissolving device 17, the second lift pump 13 extracts the water to be treated in the third reactor 12, and sends it to the second ozone dissolving device 17 through the second mixing water inlet pipe 14, the water to be treated and ozone are fully mixed in the second ozone dissolving device 17, and the mixed liquid is sent to the second reactor 11 and the third reactor 12 through the second mixing water outlet pipe 10. The mixing of ozone and water to be treated in this way can make ozone and water to be treated fully mixed, which helps to improve the degradation effect of ozone on organic pollutants in water to be treated;

[0050] In the present embodiment, one second boost pump 13 and one second ozone dissolving device 17 are each provided. In actual application, the number of the second boost pump 13 and the second ozone dissolving device 17 is selected according to the specific conditions of the water to be treated to ensure the degradation effect of ozone on organic pollutants in the water to be treated; for example, two second boost pumps 13 and two second ozone dissolving devices 17 are provided, and the two second boost pumps 13 and the two second ozone dissolving devices 17 correspond to the second reactor 11 and the third reactor 12, respectively.

[0051] In an optional embodiment of the utility model, the ozone mixing device further includes:

[0052] There are multiple nozzles 6, which are respectively arranged inside the first reactor 1, the second reactor 11 and the third reactor 12, and are respectively connected to the first mixing water outlet pipe 3 and the second mixing water outlet pipe 10.

[0053] In this embodiment, nozzles 6 are respectively arranged inside the first reactor 1, the second reactor 11 and the third reactor 12, and the mixed liquid of ozone and the water to be treated is sprayed into the first reactor 1, the second reactor 11 and the third reactor 12 through the nozzle 6, so that the mixed liquid of ozone and the water to be treated can be fully and evenly dispersed inside the first reactor 1, the second reactor 11 and the third reactor 12, thereby improving the degradation effect of ozone on organic pollutants in the water to be treated.

[0054] In an optional embodiment of the present invention, the wastewater treatment device further comprises:

[0055] The dosing device 20 has a dosing end connected to the first mixing water outlet pipe 3 .

[0056] In this embodiment, hydrogen peroxide or sodium hypochlorite can be added to the first reactor 1 through the dosing device 20 and the first mixing water outlet pipe 3. Hydrogen peroxide or sodium hypochlorite can synergistically react with ozone to produce hydroxyl radicals, which can degrade organic pollutants in the water to be treated by hydroxyl radicals, thereby improving the degradation effect of organic pollutants in the water to be treated.

[0057] In an optional embodiment of the present invention, the ozone supply device comprises:

[0058] The ozone generator 18 has an air inlet connected to the oxygen source 19 , and an air outlet connected to the first ozone dissolving device 9 and the second ozone dissolving device 17 .

[0059] In this embodiment, oxygen in the oxygen source 19 enters the ozone generator 18 to generate ozone, and the generated ozone enters the first ozone dissolving device 9 and the second ozone dissolving device 17 through the gas outlet of the ozone generator 18 to be fully mixed with the water to be treated;

[0060] In practical applications, the oxygen source 19 includes, but is not limited to: a liquid oxygen source, a pressure swing adsorption (PSA) oxygen generator, and a vacuum pressure swing adsorption (VPSA) oxygen generator.

[0061] In an optional embodiment of the present invention, the breathing valves of the first reactor 1 , the second reactor 11 and the third reactor 12 are connected to the ozone tail gas destroyer 16 through the exhaust pipe 15 .

[0062] In this embodiment, the pressure safety of the first reactor 1, the second reactor 11 and the third reactor 12 can be ensured by setting a breathing valve. The ozone discharged from the breathing valve enters the ozone exhaust gas destroyer 16 through the exhaust pipe 15, and the ozone is decomposed by the ozone exhaust gas destroyer 16 to prevent ozone from escaping into the atmosphere.

[0063] In an optional embodiment of the present invention, the wastewater treatment device further comprises:

[0064] A backwash fan 4 , the air outlet end of the backwash fan 4 is connected to the first reactor 1 , the second reactor 11 and the third reactor 12 through a backwash pipeline 5 .

[0065] In this embodiment, the backwash fan 4 and the backwash pipeline 5 can be used to flush the inside of the first reactor 1, the second reactor 11 and the third reactor 12 and the ozone catalyst 2 to ensure that the water to be treated flows smoothly inside the first reactor 1, the second reactor 11 and the third reactor 12.

[0066] In an optional embodiment of the present invention, two layers of hollow fiberglass supporting layers are provided inside the first reactor 1, the second reactor 11 and the third reactor 12, and the ozone catalyst 2 is filled between the two layers of fiberglass supporting layers.

[0067] In this embodiment, a glass fiber reinforced plastic supporting layer is used to fix the ozone catalyst 2 to ensure that the ozone catalyst 2 is fully mixed with ozone and the water to be treated, thereby ensuring the degradation effect of organic pollutants in the water to be treated and preventing the ozone catalyst 2 from being lost.

[0068] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A ternary precursor wastewater treatment device, characterized in that: include: At least one reactor, wherein the water inlet of the reactor receives the water to be treated, and the water outlet of the reactor is connected to the evaporator; An ozone catalyst (2) is filled inside the reactor, and the ozone catalyst (2) is located between the water inlet and the water outlet of the reactor; An ozone mixing device, wherein the air inlet end of the ozone mixing device is connected to the air outlet end of the ozone supply device, and the water inlet end and the water outlet end of the ozone mixing device are both connected to the reactor.

2. The ternary precursor wastewater treatment device according to claim 1, characterized in that: The reactor comprises: a first reactor (1), a second reactor (11) and a third reactor (12) which are connected in series in sequence, wherein the water inlet of the first reactor (1) receives the water to be treated, and the water outlet of the third reactor (12) is connected to an evaporator.

3. The ternary precursor wastewater treatment device according to claim 2, characterized in that: The ozone mixing device comprises: A first lift pump (7), wherein a water inlet end of the first lift pump (7) is connected to the first reactor (1); A first ozone dissolving device (9), wherein the air inlet end of the first ozone dissolving device (9) is connected to the air outlet end of the ozone supply device, the water inlet end of the first ozone dissolving device (9) is connected to the water outlet end of the first lifting pump (7) via a first mixed water inlet pipe (8), and the water outlet end of the first ozone dissolving device (9) is connected to the first reactor (1) via a first mixed water outlet pipe (3).

4. The ternary precursor wastewater treatment device according to claim 3, characterized in that: The ozone mixing device further comprises: a second lift pump (13), wherein a water inlet end of the second lift pump (13) is connected to the third reactor (12); A second ozone dissolving device (17), wherein the air inlet end of the second ozone dissolving device (17) is connected to the air outlet end of the ozone supply device, the water inlet end of the second ozone dissolving device (17) is connected to the water outlet end of the second lift pump (13) via a second mixed water inlet pipe (14), and the water outlet end of the second ozone dissolving device (17) is connected to the second reactor (11) and the third reactor (12) via a second mixed water outlet pipe (10).

5. The ternary precursor wastewater treatment device according to claim 4, characterized in that: The ozone mixing device further comprises: A plurality of nozzles (6) are provided, and the plurality of nozzles (6) are respectively arranged inside the first reactor (1), the second reactor (11) and the third reactor (12), and are respectively connected to the first mixing water outlet pipe (3) and the second mixing water outlet pipe (10).

6. The ternary precursor wastewater treatment device according to claim 5, characterized in that: Also includes: A drug adding device (20), wherein a drug outlet end of the drug adding device (20) is connected to the first mixed water outlet pipe (3).

7. The ternary precursor wastewater treatment device according to claim 4, characterized in that: The ozone supply device comprises: An ozone generator (18), wherein the air inlet end of the ozone generator (18) is connected to an oxygen source (19), and the air outlet end of the ozone generator (18) is connected to the air inlet ends of the first ozone dissolving device (9) and the second ozone dissolving device (17).

8. The ternary precursor wastewater treatment device according to claim 2, characterized in that: The breathing valves of the first reactor (1), the second reactor (11) and the third reactor (12) are connected to the ozone tail gas destroyer (16) through an exhaust pipe (15).

9. The ternary precursor wastewater treatment device according to claim 2, characterized in that: Also includes: A backwash fan (4), wherein an air outlet end of the backwash fan (4) is connected to the first reactor (1), the second reactor (11) and the third reactor (12) via a backwash pipeline (5).

10. The ternary precursor wastewater treatment device according to claim 2, characterized in that: Two layers of hollow fiberglass supporting layers are arranged inside the first reactor (1), the second reactor (11) and the third reactor (12), and the ozone catalyst (2) is filled between the two layers of fiberglass supporting layers.

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