A device for controlling N2O emissions during denitrification reactions

Abstract

The utility model relates to the field of denitrification treatment technology, concretely to a device for controlling N2O emission in denitrification reaction, including collection box, exhaust pipe, flow velocity sensor, control valve, lifting plate, concentration sensor, bottom cylinder, inner column, guide block, touch button and pressure sensor column, a device for controlling N2O emission in denitrification reaction of the utility model, through the communicating pipe set up on the denitrification reactor, the collection box set up on the communicating pipe, the exhaust pipe set up on the collection box, can discharge the N2O inside the denitrification reactor, the control valve set up on the exhaust pipe can intermittent discharge the N2O inside the denitrification reactor, through the flow velocity sensor set up on the exhaust pipe, can know the flow velocity value when the exhaust pipe discharges N2O, through the concentration sensor set up on the lifting plate, can know the amount of value of N2O inside the collection box.

Description

Technical Field

[0001] This utility model relates to the field of denitrification treatment technology, specifically to a device for controlling N2O emissions during denitrification reactions. Background Technology

[0002] Strengthening nitrogen removal from water bodies helps reduce the risks of eutrophication and aquatic ecosystem imbalance. Short-cut nitrification-denitrification processes have advantages such as low oxygen demand, low carbon source requirements, and low sludge production. In addition, when nitrite is used as an electron acceptor, the denitrification rate increases by 1.5-2 times compared to nitrate. N2O is an intermediate product in the denitrification process and is one of the major greenhouse gases. It not only contributes to the greenhouse effect but also damages the ozone layer. The total N2O emissions from wastewater treatment plants account for about 4-6% of global emissions. Biological denitrification processes are an important source of N2O. Using nitrite as an electron acceptor (short-cut nitrification-denitrification, anaerobic ammonium oxidation-denitrification) will increase the N2O emissions in denitrification biological systems.

[0003] Chinese patent document CN 213623471 U discloses a device for highly enriching and recovering N2O in a denitrification process, including a biofilm reactor, a membrane separation component, a modified hollow fiber membrane, a vacuum pump, and an N2O collection device. The biofilm reactor is equipped with a membrane separation component, on which a modified hollow fiber membrane is mounted. A biofilm is attached and grown on the outer surface of the modified hollow fiber membrane. The biofilm reactor is connected to an inlet and an outlet pipe, and the modified hollow fiber membrane is connected to the N2O collection device. Using this invention for highly enriching and recovering N2O in a denitrification process simplifies the process flow, reduces operating costs, and greatly improves the enrichment and recovery efficiency of N2O, laying the foundation for the energy utilization of nitrogen in wastewater treatment.

[0004] However, the aforementioned device cannot precisely control the emission of N2O during use. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a device for controlling N2O emissions in the denitrification reaction, so as to solve the above problems.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A device for controlling NO emissions during denitrification reactions, comprising:

[0008] The device includes a denitrification reactor. A collection box is installed on the upper side of the denitrification reactor. The collection box includes a lower box and an upper box. An exhaust pipe is fixedly connected to the top of the upper box. A flow rate sensor and a control valve are installed on the exhaust pipe. A lifting plate is installed inside the lower box. A concentration sensor is installed at the bottom of the lifting plate. A bottom cylinder is fixed to the bottom of the lower box. An inner column is slidably connected to the inner wall of the bottom cylinder. A guide block is fixed to the bottom of the inner column. A circular hole is opened on the lifting plate. The outer wall of the inner column is slidably connected to the inner wall of the circular hole. A button is fixed to the top of the inner column. A pressure sensor is installed on the inner top wall of the upper box.

[0009] Preferably, the surface of the lifting plate has an opening.

[0010] Preferably, the inner wall of the lower housing is provided with a sliding groove adapted to the lifting plate.

[0011] Preferably, the bottom of the guide block is conical.

[0012] Preferably, a return spring is fixed between the top of the guide block and the bottom of the bottom cylinder.

[0013] Preferably, the lower housing and the upper housing are connected by bolts and nuts.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. The N2O inside the denitrification reactor can be discharged through the connecting pipe, the collection box on the connecting pipe, and the exhaust pipe on the collection box. The control valve on the exhaust pipe can discharge the N2O inside the denitrification reactor intermittently. The flow rate sensor on the exhaust pipe can determine the flow rate of N2O discharged from the exhaust pipe. The concentration sensor on the lifting plate can determine the amount of N2O inside the collection box.

[0016] 2. The bottom cylinder on the lifting plate, the inner column inside the bottom cylinder, and the guide block on the inner column can guide N2O to the inside of the collection box and control the N2O flowing into the collection box from the denitrification reactor, thereby maintaining a stable value of N2O in the collection box. The increase in N2O in the collection box can be detected by the button on the inner column and the pressure sensor inside the collection box, thereby controlling the control valve to continuously discharge N2O through the exhaust pipe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a structural schematic diagram of the first three-dimensional cross-section of the collection box of this utility model.

[0019] Figure 3 This is a structural schematic diagram of the first three-dimensional cross-section of the lifting plate of this utility model.

[0020] In the picture:

[0021] 10. Denitrification reactor; 11. Connecting pipe; 12. Collection box; 121. Lower chamber; 122. Upper chamber; 13. Exhaust pipe; 14. Flow rate sensor; 15. Control valve; 16. Lifting plate; 17. Bottom cylinder; 18. Inner column; 19. Circular hole; 20. Button; 21. Pressure sensor; 22. Concentration sensor; 24. Guide block; 25. Return spring; 26. Sliding groove. Detailed Implementation

[0022] The following will refer to the attached reference. Figures 1 to 3 The various embodiments of this utility model will be described in detail below. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0023] A device for controlling N2O emissions during denitrification reactions, as shown in the attached... Figures 1-3 As shown, it includes: a denitrification reactor 10, a collection box 12 is provided on the upper side of the denitrification reactor 10, the collection box 12 includes a lower box 121 and an upper box 122, the lower box 121 and the upper box 122 are connected by bolts and nuts, and an exhaust pipe 13 is fixedly connected to the top of the upper box 122. A flow rate sensor 14 and a control valve 15 are installed on the exhaust pipe 13.

[0024] The lower housing 121 has a lifting plate 16 inside, with an opening on its surface. The inner wall of the lower housing 121 has a sliding groove 26 that matches the lifting plate 16, and the lifting plate 16 is inserted into the sliding groove 26. A concentration sensor 22 is installed at the bottom of the lifting plate 16 to monitor the amount of N2O inside the collection box 12. A bottom cylinder 17 is fixed to the bottom of the lower housing 121, and an inner column 18 is slidably connected to the inner wall of the bottom cylinder 17. The diameter of the inner column 18 is smaller than the diameter of the bottom cylinder 17. A guide block 24 is fixed to the bottom of the inner column 18, and the bottom of the guide block 24 is conical. There is a gap between the conical surface of the guide block 24 and the top of the connecting pipe 11 for the flow of N2O. A return spring 25 is fixed between the top of the guide block 24 and the bottom of the bottom cylinder 17 to support the guide block 24.

[0025] A circular hole 19 is provided on the lifting plate 16, and the circular hole 19 corresponds to the bottom cylinder 17. The outer wall of the inner column 18 is slidably connected to the inner wall of the circular hole 19. A button 20 is fixed on the top of the inner column 18, and a pressure sensor 21 is installed on the inner top wall of the upper box 122.

[0026] In use, the N2O generated inside the denitrification reactor 10 flows into the connecting pipe 11, and the gas inside the connecting pipe 11 flows into the collection box 12 through the guide block 24. The control system can intermittently control the opening state of the control valve 15, and the concentration sensor 22 can detect the N2O concentration inside the collection box 12. When the N2O concentration increases, it means that the amount of N2O inside the collection box 12 has increased. Then, the control system can continuously open the control valve 15 to control the discharge of N2O from the exhaust pipe 13 into the collection box 12.

[0027] When the amount of N2O generated inside the denitrification reactor 10 increases, the impact of N2O on the guide block 24 will increase, and the guide block 24 will move upward. As the guide block 24 moves upward, the distance between the conical surface of the guide block 24 and the top of the exhaust pipe 13 increases, and a large amount of N2O flows into the collection box 12. The upward movement of the guide block 24 causes the inner column 18 to slide inside the bottom cylinder 17 and the circular hole 19. At the same time, the guide block 24 compresses the reset spring 25. The upward movement of the inner column 18 causes the button 20 to press against the pressure sensor 21. At this time, it means that the N2O inside the collection box 12 has increased significantly. The control valve 15 is continuously opened by the control system to discharge N2O. The flow rate sensor 14 allows the user to know the flow rate of the fluid inside the exhaust pipe 13.

[0028] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A device for controlling N2O emissions during denitrification, characterized in that, The reactor includes a denitrification reactor (10), with a collection box (12) on its upper side. The collection box (12) includes a lower box (121) and an upper box (122). An exhaust pipe (13) is fixedly connected to the top of the upper box (122). A flow rate sensor (14) and a control valve (15) are installed on the exhaust pipe (13). A lifting plate (16) is installed inside the lower box (121), and a concentration sensor is installed at the bottom of the lifting plate (16). The sensor (22), the bottom of the lower box (121) is fixed with a bottom cylinder (17), the inner wall of the bottom cylinder (17) is slidably connected with an inner column (18), the bottom of the inner column (18) is fixed with a guide block (24), the lifting plate (16) is provided with a circular hole (19), and the outer wall of the inner column (18) is slidably connected to the inner wall of the circular hole (19). The top of the inner column (18) is fixed with a button (20), and the inner top wall of the upper box (122) is equipped with a pressure sensor (21).

2. The device for controlling N2O emissions during denitrification according to claim 1, characterized in that, The lifting plate (16) has an opening on its surface.

3. The device for controlling N2O emissions during denitrification according to claim 2, characterized in that, The inner wall of the lower housing (121) is provided with a sliding groove (26) that is adapted to the lifting plate (16).

4. The device for controlling N2O emissions during denitrification according to claim 3, characterized in that, The bottom of the guide block (24) is conical.

5. The device for controlling N2O emissions during denitrification according to claim 4, characterized in that, A return spring (25) is fixed between the top of the guide block (24) and the bottom of the bottom cylinder (17).

6. The device for controlling N2O emissions during denitrification according to claim 5, characterized in that, The lower housing (121) and the upper housing (122) are connected by bolts and nuts.

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