CN210683452U

CN210683452U - Nitrogenous waste water recycling system

Info

Publication number: CN210683452U
Application number: CN201921390123.5U
Authority: CN
Inventors: 陈禾峰; 杨浩飞
Original assignee: WUXI ZHONGTIAN SOLID WASTE DISPOSAL CO Ltd
Current assignee: WUXI ZHONGTIAN SOLID WASTE DISPOSAL CO Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-06-05
Anticipated expiration: 2029-08-23

Abstract

The utility model relates to a nitrogenous waste water recycling system, nitrogenous raw water is respectively placed in a raw water storage tank, a concentrated solution storage tank and a polar liquid storage tank, the three storage tanks respectively enter an electrodialysis system for treatment through a lift pump and a security filter, wherein the substandard water of the raw water after electrodialysis is circularly treated through the process flow, and the substandard water is accessed into workshop equipment for use; the concentrated water generated by the raw water after electrodialysis reaches a certain concentration after a certain circulation amount and is recycled as the raw material; the polar liquid generated after the raw water is subjected to electrodialysis is not discharged for recycling. Not only realizes the purpose of wastewater treatment, but also realizes the wastewater reuse, makes full use of water resources and reduces the production cost.

Description

Nitrogenous waste water recycling system

Technical Field

The utility model belongs to the technical field of nitrogenous waste water treatment technique and specifically relates to a nitrogenous waste water recycling system.

Background

In the environmental field, many countries have established strict emission standards for nitrogen content. The nitrogen-containing wastewater is directly discharged into a natural water body, so that the water body is easy to eutrophicate, the growth of aquatic organisms is influenced, and an ecological system is damaged.

In the prior art, the treatment method for nitrogen-containing wastewater in industry mainly comprises a stripping method, a biochemical method, a breakpoint chlorination method, an ion exchange method and a chemical precipitation method. The methods have the characteristics of simple process, stable denitrification effect and the like, but have certain limitations. The following defects mainly exist:

(1) the stripping method is commonly used for treating high-concentration wastewater, but has the disadvantages of high energy consumption, high operation cost and high nitrogen content of the treated wastewater;

(2) the biochemical method is suitable for wastewater with high organic content, and occupies large area;

(3) the breakpoint chlorination method has high treatment cost and the product has harmfulness;

(4) the ion exchange method generally assists other processes to jointly treat the nitrogen wastewater due to large consumption of the adsorbent and high regeneration cost;

(5) the chemical precipitation method has large dosage and high cost, and needs to further develop cheap medicaments.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects in the prior art and provides a nitrogen-containing wastewater recycling system, so that the nitrogen-containing wastewater recycling system is small in occupied area, simple in process, low in cost and free of secondary pollution.

The utility model discloses the technical scheme who adopts as follows:

the nitrogen-containing wastewater recycling system comprises an electrodialysis system, wherein one end of the electrodialysis system is provided with three input ports which are a first input port, a second input port and a third input port respectively, and the other end of the electrodialysis system is provided with three output ports which are a first output port, a second output port and a third output port respectively; the device comprises a raw water storage tank, a concentrated liquid storage tank and an electrode liquid storage tank which are arranged in parallel, wherein the output end of the raw water storage tank is sequentially connected with a first ball valve, a raw liquid lifting pump, a first check valve and a first safety filter in series through a first output pipeline, and the output end of the first safety filter is connected to a first input port through a first filter output pipeline; the output end of the concentrated solution storage tank is sequentially connected with a second ball valve, a concentrated solution lifting pump, a second check valve and a second security filter in series through a second output pipeline, the output end of the second security filter is provided with a second filter output pipeline, the second filter output pipeline is branched into two paths, one path is communicated with a second input port through a branch pipeline, the other path is connected with a concentrated solution output pipeline, and the concentrated solution reaching the standard is used as a raw material to be reused in other production processes; the output end of the polar liquid storage tank is sequentially connected with a third ball valve, a polar liquid lifting pump, a third check valve and a third safety filter in series through a third output pipeline, and the output end of the third safety filter is connected to a third input port through a third filter output pipeline; a first output port of the electrodialysis system is communicated to a concentrated solution storage tank through a first return pipeline, a second output port is communicated to a raw water storage tank through a second return pipeline, a third output port is communicated to an electrode solution storage tank through a third return pipeline, the second output port is further connected with an output header pipe, and the output header pipe outputs standard water to wait for recycling.

The further technical scheme is as follows:

waste water is placed in the raw water storage tank, the concentrated solution storage tank and the polar liquid storage tank, and the waste water is nitrogen-containing raw water.

The utility model has the advantages as follows:

the utility model has the advantages of compact and reasonable structure, convenient operation places nitrogenous raw water in raw water storage tank, dense liquid storage tank, utmost point liquid storage tank respectively, and three storage tank is handled through elevator pump, security filter entering electrodialysis system respectively, and wherein the raw water is not up to standard water through the back flow behind the electrodialysis and continues through above-mentioned process flow circulation treatment, and up to standard water uses in inserting workshop appliance. The whole structure is compact, the occupied area is small,

the concentrated water generated by electrodialysis of the nitrogen-containing raw water of the utility model reaches a certain concentration after a certain circulation amount and is reused as raw material; the polar liquid generated after the raw water is subjected to electrodialysis is not discharged for recycling.

The utility model discloses an above-mentioned technical scheme not only realizes the waste water treatment purpose, still realizes the waste water retrieval and utilization, makes the water resource reach make full use of, has reduced manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein: 1. a first return line; 2. a raw water storage tank; 3. a second return line; 4. a first output line; 5. a first ball valve; 6. a stock solution lift pump; 7. a first check valve; 8. a first security filter; 9. a first filter output line; 10. a third return conduit; 11. a branch line; 12. a first input port; 13. a second input port; 14. a third input port; 15. an electrodialysis system; 16. an output header pipe; 17. a third output port; 18. a second output port; 19. a first output port; 20. a concentrated liquid output pipeline; 21. a second filter output line; 22. a second cartridge filter; 23. a second check valve; 24. a concentrate lift pump; 25. a second ball valve; 26. a second output line; 27. a concentrated solution storage tank; 28. a polar liquid storage tank; 29. a third output line; 30. a third ball valve; 31. an electrode liquid lift pump; 32. a third check valve; 33. a third cartridge filter; 34. a third filter output line.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the nitrogen-containing wastewater recycling system of this embodiment includes an electrodialysis system 15, one end of the electrodialysis system 15 is provided with three input ports, which are a first input port 12, a second input port 13 and a third input port 14, respectively, and the other end of the electrodialysis system 15 is provided with three output ports, which are a first output port 19, a second output port 18 and a third output port 17, respectively; the device is characterized by further comprising a raw water storage tank 2, a concentrated solution storage tank 27 and an electrode solution storage tank 28 which are arranged in parallel, wherein the output end of the raw water storage tank 2 is sequentially connected with a first ball valve 5, a raw solution lifting pump 6, a first check valve 7 and a first safety filter 8 in series through a first output pipeline 4, and the output end of the first safety filter 8 is connected to a first input port 12 through a first filter output pipeline 9; the output end of the concentrated solution storage tank 27 is sequentially connected with a second ball valve 25, a concentrated solution lift pump 24, a second check valve 23 and a second security filter 22 in series through a second output pipeline 26, the output end of the second security filter 22 is provided with a second filter output pipeline 21, the second filter output pipeline 21 is branched into two paths, one path is communicated with a second input port 13 through a branch pipeline 11, the other path is connected with a concentrated solution output pipeline 20, and the concentrated solution reaching the standard is used as a raw material to be reused in other production processes; the output end of the polar liquid storage tank 28 is connected in series with a third ball valve 30, a polar liquid lift pump 31, a third check valve 32 and a third safety filter 33 in sequence through a third output pipeline 29, and the output end of the third safety filter 33 is connected to the third input port 14 through a third filter output pipeline 34; a first output port 19 of the electrodialysis system 15 is communicated to a concentrated solution storage tank 27 through a first return pipeline 1, a second output port 18 is communicated to a raw water storage tank 2 through a second return pipeline 3, a third output port 17 is communicated to an electrode solution storage tank 28 through a third return pipeline 10, the second output port 18 is further connected with an output header pipe 16, and the output header pipe 16 outputs water reaching the standard to be reused.

Wastewater is placed in the raw water storage tank 2, the concentrated solution storage tank 27 and the polar liquid storage tank 28, and the wastewater is nitrogen-containing raw water.

In the actual use process, the method is completed through the following steps:

the method comprises the following steps: the nitrogenous raw water is respectively placed in a raw water storage tank 2, a concentrated solution storage tank 27 and an electrode solution storage tank 28, and the three storage tanks respectively enter an electrodialysis system 15 for treatment through a lift pump and a cartridge filter;

step two: wherein the water which does not reach the standard after the raw water containing nitrogen is subjected to electrodialysis is circularly treated by the process flow, and the water which reaches the standard is connected into workshop equipment for use through an output header pipe 16; concentrated water generated by electrodialysis of raw water containing nitrogen reaches a certain concentration after a certain circulation amount and is recycled as raw material; polar liquid generated after the raw water containing nitrogen is subjected to electrodialysis is not discharged for recycling.

The fresh water up to the standard after the nitrogen-containing wastewater is subjected to electrodialysis treatment is reused for production, the concentrated water is directly used in other process production, and the polar liquid is not discharged and recycled due to unchanged concentration.

The electrodialysis system adopts an electrodialysis method, and the electrodialysis method is a method for desalting seawater by utilizing an ion exchange membrane. An ion exchange membrane is a functional membrane, and is divided into an anion exchange membrane and a cation exchange membrane (called as a negative membrane and a positive membrane for short). The positive membrane allows only cations to pass through the negative membrane and only anions to pass through, which is the permselectivity of the ion exchange membrane. Under the action of an external electric field, anions and cations in the aqueous solution move to the anode and the cathode respectively, and if an exchange membrane is added between the anions and the cathode, the separation and concentration can be achieved. Electrodialysis utilizes this principle.

The precise filtering device (also called as a cartridge filter) is mainly used for filtering after multi-medium pretreatment and before membrane filtering equipment such as reverse osmosis, ultrafiltration and the like. The filter element is used for filtering fine substances (such as tiny quartz sand, activated carbon particles and the like) filtered by a plurality of media so as to ensure the water quality filtering precision and protect the membrane filter element from being damaged by large-particle substances. The precision grade of the filtering element arranged in the precise filtering device can be divided into 0.5 mu s,1 mu s,5 mu s,10 mu s and the like, and different filtering precisions are selected according to different use occasions to ensure the precision of the post-stage water outlet and the safety of the post-stage membrane element.

Each ball valve, check valve for the commodity of selling.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims

1. The utility model provides a nitrogenous waste water recycling system which characterized in that: the device comprises an electrodialysis system (15), wherein one end of the electrodialysis system (15) is provided with three input ports which are a first input port (12), a second input port (13) and a third input port (14), and the other end of the electrodialysis system (15) is provided with three output ports which are a first output port (19), a second output port (18) and a third output port (17); the device is characterized by further comprising a raw water storage tank (2), a concentrated solution storage tank (27) and an electrode solution storage tank (28) which are arranged in parallel, wherein the output end of the raw water storage tank (2) is sequentially connected with a first ball valve (5), a raw solution lifting pump (6), a first check valve (7) and a first safety filter (8) in series through a first output pipeline (4), and the output end of the first safety filter (8) is connected to a first input port (12) through a first filter output pipeline (9); the output end of the concentrated solution storage tank (27) is sequentially connected with a second ball valve (25), a concentrated solution lifting pump (24), a second check valve (23) and a second security filter (22) in series through a second output pipeline (26), the output end of the second security filter (22) is provided with a second filter output pipeline (21), the second filter output pipeline (21) is branched into two paths, one path is communicated with a second input port (13) through a branch pipeline (11), the other path is connected with a concentrated solution output pipeline (20), and the up-to-standard concentrated solution is used as a raw material for the production process; the output end of the polar liquid storage tank (28) is sequentially connected with a third ball valve (30), a polar liquid lifting pump (31), a third check valve (32) and a third security filter (33) in series through a third output pipeline (29), and the output end of the third security filter (33) is connected to a third input port (14) through a third filter output pipeline (34); a first output port (19) of the electrodialysis system (15) is communicated into a concentrated solution storage tank (27) through a first return pipeline (1), a second output port (18) is communicated into a raw water storage tank (2) through a second return pipeline (3), a third output port (17) is communicated into an electrode solution storage tank (28) through a third return pipeline (10), the second output port (18) is further connected with an output header pipe (16), and the output header pipe (16) outputs standard water to be recycled.

2. The nitrogen-containing wastewater recycling system according to claim 1, wherein: waste water is placed in the raw water storage tank (2), the concentrated solution storage tank (27) and the polar liquid storage tank (28), and the waste water is nitrogen-containing raw water.