Photovoltaic silver paste concentrated water recycling process system

Abstract

The utility model discloses a photovoltaic silver paste concentrated water reclamation process system, which relates to the technical field of wastewater treatment, and comprises a photovoltaic silver paste concentrated water collecting tank for pretreatment, a first neutralization reaction tank and a potassium hydroxide preparation tank, and the photovoltaic silver paste concentrated water collecting tank and the first neutralization reaction tank are respectively provided with a water inlet and a water outlet; the three-dimensional electrochemical catalytic oxidation device and the ultrafiltration membrane treatment device are used for advanced oxidation treatment; the device for evaporation treatment comprises a premixing tank, a nickel melting recovery phosphate preparation tank and an evaporation device. The cooling tank, the mixing tank, the catalyst preparation tank, the oxidation tank, the oxidant preparation tank, the second neutralization reaction tank, the liquid caustic soda tank, the filtering device and the SCR zero discharge system are used for condensate water treatment. And the recycling treatment of the photovoltaic silver paste concentrated water can be realized through the treatment of each mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field especially relates to a photovoltaic silver paste concentrated water resource technology system. BACKGROUND

[0002] With the gradual enhancement of environmental protection consciousness and the continuous growth of energy demand, solar photovoltaic technology is widely used in various fields. As an important component of solar cells, photovoltaic silver paste uses various dispersants (such as polyvinyl alcohol, polyethylene glycol, etc.) and reducing agents (ascorbic acid, sodium citrate, glucose, etc.), and surfactants in the production process. Therefore, a large amount of high-concentration organic wastewater will be generated, and such wastewater is complex in composition and difficult to treat. At present, the treatment method of photovoltaic silver paste wastewater adopts oxidation, biochemical and other conventional single means for treatment, which not only has high treatment cost, but also cannot meet the discharge requirements.

[0003] From the above, it can be seen that the provision of an efficient photovoltaic silver paste concentrated water treatment process system has great application significance for environmental protection and sustainable production of photovoltaic enterprises. CONTENT OF THE UTILITY MODEL

[0004] To solve the problems existing in the prior art, the purpose of the utility model is to provide a photovoltaic silver paste concentrated water resource technology system, which uses photovoltaic silver paste concentrated water as raw material, comprehensively utilizes the phosphates, hypophosphorous acid salts and phosphite salts recovered by the nickel recovery system, obtains nitrogen, phosphorus and potassium compound organic fertilizer, and evaporates the condensed water after treatment and discharges it into the SCR zero emission system.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] The utility model provides a kind of photovoltaic silver paste concentrated water resource chemical process system, including photovoltaic silver paste concentrated water collection tank, first neutralization reaction tank, three-dimensional electrochemical catalytic oxidation device, ultrafiltration membrane processing device, premix tank, evaporation device, cooling tank, mixing tank, oxidation tank, second neutralization reaction tank, filter device and SCR zero emission system being sequentially arranged;The photovoltaic silver paste concentrated water collection tank is used to receive photovoltaic silver paste concentrated water;The first neutralization reaction tank is used to add lye to the photovoltaic silver paste concentrated water and neutralize;The three-dimensional electrochemical catalytic oxidation device is used to remove organic matter in concentrated water by three-dimensional electrocatalytic oxidation to the solution after neutralization;The ultrafiltration membrane processing device is used to filter solution;The premix tank is used to add nickel recovery phosphate to solution;The evaporation device is used for the evaporation crystallization of solution;The cooling tank is used for the cooling of evaporation condensate water;The mixing tank is used to add catalyst to the evaporation condensate water after cooling;The oxidation tank is used to add oxidizing agent to condensate water;The second neutralization reaction tank is used to add liquid caustic soda to condensate water and neutralize;The filter device is used to filter the solution after neutralization;The SCR zero emission system is used for subsequent processing to filtered liquid.

[0007] Optionally, the first neutralization reaction tank is connected with a potassium hydroxide preparation tank, and a second lifting pump is arranged between the first neutralization reaction tank and the potassium hydroxide preparation tank.

[0008] Optionally, a first lifting pump is arranged between the photovoltaic silver paste concentrated water collection tank and the first neutralization reaction tank, a third lifting pump is arranged between the first neutralization reaction tank and the three-dimensional electrochemical catalytic oxidation device, a fourth lifting pump is arranged between the three-dimensional electrochemical catalytic oxidation device and the ultrafiltration membrane processing device, and a sixth lifting pump is arranged between the premix tank and the evaporation device.

[0009] Optionally, the premix tank is connected with a nickel recovery phosphate preparation tank, and a fifth lifting pump is arranged between the premix tank and the nickel recovery phosphate preparation tank.

[0010] Optionally, the mixing tank is connected with a catalyst preparation tank, and a seventh lifting pump is arranged between the mixing tank and the catalyst preparation tank.

[0011] Optionally, the oxidation tank is connected with an oxidizing agent preparation tank, and an eighth lifting pump is arranged between the oxidation tank and the oxidizing agent preparation tank.

[0012] Optionally, the second neutralization reaction tank is connected with a liquid caustic soda tank, and a ninth lifting pump is arranged between the second neutralization reaction tank and the liquid caustic soda tank.

[0013] Optionally, the filter device comprises a filter press.

[0014] Optionally, a tenth lifting pump is arranged between the second neutralization reaction tank and the filtering device.

[0015] Optionally, a stirring device is arranged in each of the first neutralization reaction tank, the second neutralization reaction tank, the premixing tank and the mixing tank.

[0016] The utility model discloses have obtained following technical effect compared with prior art:

[0017] The utility model discloses photovoltaic silver paste concentrated water resource technology system, first photovoltaic silver paste concentrated water passes through pretreatment mechanism, adopts potassium hydroxide to carry out neutralization processing, and makes copper lead silver etc. Metal is converted into corresponding hydroxide and is removed, and after neutralization, liquid enters senior oxidation mechanism, and oxidation is carried out in three -dimensional electrochemistry catalytic oxidation device, and after oxidation, liquid is arranged to ultrafiltration membrane processing device, and the water production of ultrafiltration membrane enters evaporation mechanism, and after fully mixing with the phosphate, hypophosphorous acid salt, phosphite recovered in nickel system, evaporates, obtains nitrogen phosphorus potassium compound organic fertilizer, and evaporation condensate water enters condensate water processing mechanism, and after cooling, oxidation, neutralization, filter pressing processing in proper order, is arranged into SCR zero emission system. Realize the resource disposal of photovoltaic silver paste wastewater, and the wastewater treatment process is easy to operate, safe and reliable, and the environmental pollution is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0019] Figure 1 It is the structure schematic drawing of photovoltaic silver paste wastewater resource technology system in the utility model.

[0020] The figure mark explanation: 1, photovoltaic silver paste concentrated water collection tank, 2, first neutralization reaction tank, 3, premixing tank, 4, cooling tank, 5, mixing tank, 6, oxidation tank, 7, second neutralization reaction tank, 8, potassium hydroxide preparation tank, 9, nickel recovery phosphate preparation tank, 10, catalyst preparation tank, 11, oxidizing agent preparation tank, 12, liquid alkali tank, 13, filter press, 14, three-dimensional electrochemistry catalytic oxidation device, 15, ultrafiltration membrane processing device, 16, evaporation device, 17, SCR zero emission system, 18, first lifting pump, 19, second lifting pump, 20, third lifting pump, 21, fourth lifting pump, 22, fifth lifting pump, 23, sixth lifting pump, 24, seventh lifting pump, 25, eighth lifting pump, 26, ninth lifting pump, 27, tenth lifting pump. DETAILED DESCRIPTION

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1 As shown, this embodiment provides a photovoltaic silver paste concentrate resource utilization process system, including a pretreatment unit, an advanced oxidation unit, an evaporation unit, and a condensate treatment unit.

[0024] The pretreatment mechanism includes a photovoltaic silver paste concentrate collection tank 1, a first neutralization reaction tank 2, a potassium hydroxide preparation tank 8, and a second booster pump 19. Both the photovoltaic silver paste concentrate collection tank 1 and the first neutralization reaction tank 2 are equipped with inlets and outlets. The inlet of the photovoltaic silver paste concentrate collection tank 1 receives photovoltaic silver paste concentrate, and the outlet is sent to the first neutralization reaction tank 2 through the first booster pump 18. The stirring device in the first neutralization reaction tank 2 is turned on, and potassium hydroxide solution from the potassium hydroxide preparation tank 8 is added as needed. After the reaction is completed, the neutralized liquid is pumped into the advanced oxidation mechanism through the third booster pump 20.

[0025] The advanced oxidation mechanism includes a three-dimensional electrochemical catalytic oxidation device 14 and an ultrafiltration membrane treatment device 15. After neutralization, the liquid is oxidized by the three-dimensional electrochemical catalytic oxidation device 14 to remove organic matter from the concentrate. The oxidized liquid is then pumped into the ultrafiltration membrane treatment device 15 by the fourth booster pump 21, and the filtered liquid is discharged into the evaporation mechanism.

[0026] The evaporation mechanism includes a premixing tank 3, a nickel recovery phosphate preparation tank 9, a fifth booster pump 22, and an evaporation device 16. After filtration, the liquid is discharged into the premixing tank 3. The stirring device in the premixing tank 3 is turned on, and a certain amount of phosphate, hypophosphite, and phosphite mixture from the nickel recovery phosphate preparation tank 9 is added. The mixed liquid is then pumped into the evaporation device 16 by the sixth booster pump 23. After evaporation and crystallization, nitrogen, phosphorus, and potassium compound organic fertilizer is obtained. The evaporation condensate is discharged to the condensate treatment unit.

[0027] The condensed water treatment mechanism comprises a cooling tank 4, a mixing tank 5, a catalyst preparation tank 10, a seventh lifting pump 24, an oxidation tank 6, an oxidant preparation tank 11, an eighth lifting pump 25, a second neutralization reaction tank 7, a liquid alkali tank 12, a ninth lifting pump 26, a filter press 13 and an SCR zero-emission system 17. Evaporated condensed water is discharged into the cooling tank 4, and after cooling to the standard, it is discharged into the mixing tank 5. The stirring device in the mixing tank 5 is opened, a certain amount of catalyst in the catalyst preparation tank 10 is added, and after being fully mixed and uniformly mixed, it is discharged into the oxidation tank 6. The stirring device in the oxidation tank 6 is opened, and the oxidant in the oxidant preparation tank 11 is added in batches as needed. After the reaction is completed, the oxidized liquid is discharged into the second neutralization reaction tank 7. The stirring device in the second neutralization reaction tank 7 is opened, and the liquid alkali in the liquid alkali tank 12 is added as needed. After the reaction is completed, the neutralized liquid is pumped into the filter press 13 through the tenth lifting pump 27. The filter press cake can be used as a catalyst, and the filter press water is discharged into the SCR zero-emission system 17 for further treatment.

[0028] It should be noted that, for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application, and any reference signs in the claims should not be regarded as limiting the claims.

[0029] In the specification, the principles and implementation modes of the present application are described by using specific examples, and the above embodiment description is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In view of the above, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A photovoltaic silver paste concentrated water resource utilization process system, characterized in that, The photovoltaic silver paste concentrated water collecting tank, the first neutralization reaction tank, the three-dimensional electrochemical catalytic oxidation device, the ultrafiltration membrane treatment device, the premixing tank, the evaporation device, the cooling tank, the mixing tank, the oxidation tank, the second neutralization reaction tank, the filtering device and the SCR zero emission system are sequentially arranged.

2. The photovoltaic silver paste concentrated water resource utilization process system according to claim 1, characterized in that, The first neutralization reaction tank is connected with the potassium hydroxide preparation tank.

3. The photovoltaic silver paste concentration water resource recovery process system according to claim 1, wherein, The first neutralization reaction tank and the potassium hydroxide preparation tank are connected through the second lifting pump.

4. The photovoltaic silver paste concentration water resource recovery process system of claim 1, wherein, The first neutralization reaction tank and the three-dimensional electrochemical catalytic oxidation device are connected through the third lifting pump.

5. The photovoltaic silver paste concentration water resource recovery process system of claim 1, wherein, The three-dimensional electrochemical catalytic oxidation device and the ultrafiltration membrane treatment device are connected through the fourth lifting pump.

6. The photovoltaic silver paste concentration water resource recovery process system of claim 1, wherein, The premixing tank and the evaporation device are connected through the sixth lifting pump.

7. The photovoltaic silver paste concentration water resource recovery process system of claim 1, wherein, The premixing tank and the nickel recovery phosphate preparation tank are connected through the fifth lifting pump.

8. The photovoltaic silver paste concentration water resource recovery process system of claim 1, wherein, The mixing tank and the catalyst preparation tank are connected through the seventh lifting pump.

9. The photovoltaic silver paste concentration water resource recovery process system of claim 1, wherein, The oxidation tank and the oxidizing agent preparation tank are connected through the eighth lifting pump.

10. The photovoltaic silver paste concentration water resource recovery process system of claim 1, wherein, The second neutralization reaction tank and the liquid caustic soda tank are connected through the ninth lifting pump. The filtering device comprises a filter press. The second neutralization reaction tank and the filtering device are connected through the tenth lifting pump. The first neutralization reaction tank, the second neutralization reaction tank, the premixing tank and the mixing tank are respectively provided with stirring devices.

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