Carbon source adding device suitable for semi-underground sewage treatment plant

Abstract

The utility model provides a carbon source adding device suitable for a semi-underground sewage treatment plant, which belongs to the technical field of carbon source adding equipment and comprises a medicine storage tank, the medicine storage tank is connected with a medicine inlet pipeline, a medicine adding main pipe and an emptying pipeline, and the medicine adding main pipe is sequentially provided with a first medicine adding valve, a second medicine adding valve and a third medicine adding valve. A pressurizing pipeline spanning over the second dosing valve is additionally arranged on the dosing main pipe, a plurality of dosing branch pipes with the same structure are connected to the tail end of the dosing main pipe in parallel, dosing pumps are arranged on the dosing branch pipes, the tail ends of the plurality of dosing branch pipes are merged into a dosing pipe for dosing into the water tank, and a flow meter is arranged on the dosing pipe; according to the scheme, the booster pump, the dosing pump and the flowmeter are arranged in the pipeline, so that constant-pressure pressurized medicament delivery is realized, the safety of the pipeline is ensured, the problem of unsmooth dosing caused by overlong pipeline and height difference of the pipeline is solved, the dosing amount of the carbon source medicament is highly accurate, and the stability and efficiency of the whole system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon source dosing equipment, and particularly relates to a carbon source dosing device applicable to a semi-underground sewage treatment plant. Background Technique

[0002] A carbon source refers to a substance that can provide bioavailable carbon elements. In sewage treatment, adding an external carbon source can make up for the deficiency of natural carbon sources, provide necessary energy for denitrifying bacteria, thereby accelerating the denitrification reaction and improving the removal rate of total nitrogen. In addition, by precisely controlling the addition amount of the carbon source, the carbon-nitrogen ratio can be optimized to achieve the best denitrification effect in the sewage treatment process.

[0003] In a sewage treatment plant, the unloading methods of the carbon source are mainly ton barrel unloading or storage tank unloading. However, due to the surface activity load limit of the water treatment area box, sometimes both unloading methods do not meet the design requirements. Currently, the carbon source is dosed by placing a ton barrel at the dosing point, increasing the contact area between the ton barrel and the ground, and connecting a hose to the medicine outlet of the ton barrel to add the carbon source to the biological pond. This method requires manual medicine unloading, the dosing amount of the medicine is not accurate enough, and the medicine reserve is too small to cope with abnormal influent; while adding a storage tank with a large amount of stored medicine outside the box will have problems such as too long dosing pipelines and poor dosing due to the height difference between outside and inside the box. Content of the Utility Model

[0004] The purpose of the utility model is to provide a carbon source dosing device applicable to a semi-underground sewage treatment plant to solve the problems raised in the above background technique.

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

[0006] A carbon source dosing device applicable to a semi-underground sewage treatment plant includes:

[0007] A medicine storage tank, which is connected with a medicine inlet pipeline, a main dosing pipeline and a venting pipeline. The main dosing pipeline is successively provided with a first dosing valve, a second dosing valve and a third dosing valve. The main dosing pipeline is also provided with a pressurization pipeline that bypasses the second dosing valve. The end of the main dosing pipeline is connected in parallel with several dosing branch pipes with the same structure. A dosing pump is provided on the dosing branch pipe. The ends of the several dosing branch pipes are incorporated into a dosing pipe for dosing to a water tank, and a flow meter is provided on the dosing pipe.

[0008] As a further improvement, a pre-pressurization pump valve, a pressurization pump, a post-pressurization pump valve and a pressurization pipeline pressure gauge are successively provided on the pressurization pipeline.

[0009] As a further improvement, a flushing pipeline is connected to the main dosing pipeline between the third dosing valve and the dosing branch pipe through a tee, and a flushing valve is provided on the flushing pipeline.

[0010] As a further improvement, a medicine inlet valve, a filter, a medicine adding pump, a pulse damper, a discharge pipeline, a branch pipe pressure gauge, a back pressure valve and a medicine outlet valve are successively arranged on the medicine adding branch pipe. A pulse damper pressure gauge is installed on the pulse damper. A safety valve is arranged on the discharge pipeline, and the outlet of the discharge pipeline is connected to the medicine adding branch pipe between the filter and the medicine adding pump.

[0011] As a further improvement, a medicine outlet connecting valve is arranged on the dosing pipe between adjacent medicine adding branch pipes, and flow meters are respectively arranged on the dosing pipes outside the outermost two medicine adding branch pipes.

[0012] As a further improvement, a vent valve for controlling the venting of the medicine storage tank is installed on the vent pipeline.

[0013] As a further improvement, a cofferdam for preventing medicine leakage is arranged around the medicine storage tank. A pump pit is arranged inside the cofferdam, and a water pump is installed in the pump pit.

[0014] As a further improvement, a water suction pipeline and a medicine inlet pipeline are connected to the water pump. A drainage pipeline, a medicine suction valve, a medicine unloading pipeline and a first medicine unloading valve are successively arranged on the medicine inlet pipeline. A drainage valve is arranged on the drainage pipeline, and a second medicine unloading valve is arranged on the medicine unloading pipeline.

[0015] The beneficial effects of the above technical solutions of the present utility model are as follows:

[0016] This solution adopts the method of arranging a booster pump, a medicine adding pump, a flow meter, a safety valve and a back pressure valve in the pipeline to achieve constant pressure and pressurized delivery of medicine. This method not only ensures the safety of the pipeline, but also effectively solves the problem of poor medicine adding caused by too long pipeline and pipeline height difference through secondary pressurization. In addition, the setting of the flow meter ensures the high precision of the dosage of the carbon source medicine, thereby improving the stability and efficiency of the whole system. Description of the Drawings

[0017] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features and advantages of the exemplary embodiments of the present utility model will become readily understood. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0018] Figure 1 is the overall structure diagram of the present utility model;

[0019] Figure 2 is the partial structure of the present utility model Figure 1 ;

[0020] Figure 3 is the partial structure of the present utility modelFigure 2 。

[0021] Description of the reference numerals in the drawings:

[0022] 1. Medicine storage tank; 2. Medicine inlet pipeline; 3. Main medicine addition pipe; 4. Vent pipeline; 5. Booster pump; 6. Pressure gauge on the booster pipeline; 7. Medicine addition branch pipe; 8. Medicine addition pump; 9. Dosing pipe; 10. Flowmeter; 11. First medicine addition valve; 12. Valve before the booster pump; 13. Valve after the booster pump; 14. Booster pipeline; 15. Second medicine addition valve; 16. Third medicine addition valve; 17. Flushing pipeline; 18. Medicine inlet valve; 19. Filter; 20. Flushing valve; 21. Pulse damper; 22. Discharge pipeline; 23. Pressure gauge on the branch pipe; 24. Back pressure valve; 25. Medicine outlet valve; 26. Pressure gauge on the pulse damper; 27. Safety valve; 28. Medicine outlet connection valve; 29. Vent valve; 30. Cofferdam; 31. Pump pit; 32. Water pump; 33. Water suction pipeline; 34. Drainage pipeline; 35. Medicine suction valve; 36. Medicine unloading pipeline; 37. First medicine unloading valve; 38. Drainage valve; 39. Second medicine unloading valve. Detailed implementation manners

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Those skilled in the art should know that the embodiments described below are a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Working principle: In this solution, the chemical agent is mainly supplemented to the chemical storage tank 1 through the chemical feeding pipeline 2. When the device is running, the first chemical adding valve 11, the second chemical adding valve 15 and the third chemical adding valve 16 are opened, and the chemical agent flows into the main chemical adding pipe 3. When the liquid level in the chemical storage tank 1 is relatively low and the pressure is insufficient, the second chemical adding valve 15 is closed, the valve 12 before the booster pump and the valve 13 after the booster pump are opened, and the booster pump 5 is started. The chemical agent is sent into the main chemical adding pipe 3 through the booster pump 5, and the pressure gauge 6 on the booster pipeline monitors the pressure change of the booster pipeline 14. Then the chemical agent is pressurized by the chemical adding pump 8, and then flows from the main chemical adding pipe 3 into the chemical adding branch pipe 7, and converges into the dosing pipe 9 through the chemical adding branch pipe 7. Finally, the chemical agent is transported into the water tank through the flow meter 10 on the dosing pipe 9. This design ensures that the carbon source chemical agent can be accurately, safely and efficiently dosed into the sewage treatment process.

[0026] After introducing the basic principle of the present utility model, various non-limiting embodiments of the present utility model will be specifically introduced below. The number of any element in the drawings is for illustration rather than limitation, and any naming is only for distinction and does not have any limiting meaning.

[0027] Next, with reference to several representative embodiments of the present utility model, the principle and spirit of the present utility model will be explained in detail.

[0028] Embodiment 1 of a carbon source dosing device applicable to a semi-underground sewage treatment plant provided by the present utility model includes: a chemical storage tank 1, and the chemical storage tank 1 is connected with a chemical feeding pipeline 2, a main chemical adding pipe 3 and a venting pipeline 4.

[0029] As Figures 1 - 3 shown, the main chemical adding pipe 3 is successively provided with a first chemical adding valve 11, a second chemical adding valve 15 and a third chemical adding valve 16. The main chemical adding pipe 3 is also provided with a booster pipeline 14 bypassing the second chemical adding valve 15. The booster pipeline is successively provided with a valve 12 before the booster pump, a booster pump 5, a valve 13 after the booster pump and a pressure gauge 6 on the booster pipeline.

[0030] When the device is running, the first chemical adding valve 11, the second chemical adding valve 15 and the third chemical adding valve 16 are opened, and the chemical agent enters the main chemical adding pipe 3 under the action of the hydrostatic pressure of the chemical agent in the chemical storage tank 1. When the liquid level in the chemical storage tank 1 is relatively low, the second chemical adding valve 15 is closed, the valve 12 before the booster pump and the valve 13 after the booster pump are opened, and the booster pump 5 is started. At this time, the chemical agent is pressurized by the booster pump 5 and sent into the booster pipeline 14. The pressure gauge 6 on the booster pipeline is used to monitor the pressure change in the pipeline, so as to detect and handle abnormalities in time.

[0031] As Figures 1 - 3As shown in the figure, several dosing branch pipes 7 with the same structure are connected in parallel at the end of the dosing main pipe 3. An inlet valve 18, a filter 19, a dosing pump 8, a pulsation damper 21, a discharge pipeline 22, a branch pipe pressure gauge 23, a back pressure valve 24 and an outlet valve 25 are successively arranged on the dosing branch pipe 7; a pulsation damper pressure gauge 26 is installed on the pulsation damper 21, a safety valve 27 is arranged on the discharge pipeline 22, and the outlet of the discharge pipeline 22 is connected to the dosing branch pipe 7 between the filter 19 and the dosing pump 8.

[0032] When the device is running, open the inlet valve 18, the dosing pump 8, the pulsation damper 21 and the outlet valve 25, and the medicament is pressurized by the dosing pump 8 and flows into the dosing branch pipe 7. The setting of the filter 19 helps to intercept impurities such as solid particles and suspended matters in the medicament to ensure the purity of the medicament; in order to ensure the stable supply of the medicament, the pulsation damper 21 reduces the pressure pulsation generated when the dosing pump 8 works, and the back pressure valve 24 maintains the minimum back pressure on the dosing branch pipe 7. In addition, the safety valve 27 automatically releases pressure when the pressure is too high, and the medicament flows back to the pipeline before the dosing pump 8 through the discharge pipeline 22, while the branch pipe pressure gauge 23 and the pulsation damper pressure gauge 26 are used to monitor the pressure in the system to ensure the safety of the system.

[0033] As Figures 1 - 3 shown in the figure, the ends of the dosing branch pipes 7 are all incorporated into the dosing pipe 9 for dosing the water tank, and the two ends of the dosing pipe 9 can be used to dose the water tank with the medicament; a dosing connection valve 28 is arranged on the dosing pipe 9 between adjacent dosing branch pipes 7. In addition, flow meters 10 are respectively arranged on the dosing pipes 9 outside the outermost two dosing branch pipes 7.

[0034] When the device is running, the medicament flows into the dosing pipe 9 through the dosing branch pipe 7 and then is added to the water tank through the flow meter 10. The flow meter 10 is designed to monitor the dosage of the medicament in the dosing pipe 9 and adjust the dosing amount accordingly. In particular, the dosing connection valve 28 can be opened or closed according to the actual situation, which enables the flow rate or pressure to be adjusted through these valves when a certain dosing branch pipe 7 needs to be maintained or fails, ensuring the normal operation of other branch pipes.

[0035] As Figures 1 - 3 shown in the figure, a flushing pipeline 17 is connected through a tee on the dosing main pipe 3 between the third dosing valve 16 and the dosing branch pipe 7. A flushing valve 20 is arranged on the flushing pipeline 17, and the flushing water enters the flushing pipeline 17 from the outside. For the convenience of system maintenance, the flushing pipeline 17 is used to regularly clean the pipeline to avoid blockage, and the flushing valve 20 can be opened during use.

[0036] As Figures 1 - 3As shown, an emptying valve 29 for controlling the emptying of the medicine storage tank 1 is installed on the emptying pipeline 4; the foundation of the medicine storage tank 1 has been enhanced with waterproof measures, a cofferdam 30 for preventing medicine leakage is provided around the medicine storage tank 1, a pump pit 31 is provided within the cofferdam 30, and a water pump 32 is installed in the pump pit 31. A water extraction pipeline 33 and a medicine inlet pipeline 2 are connected to the water pump 32. A drainage pipeline 34, a medicine extraction valve 35, a medicine unloading pipeline 36, and a first medicine unloading valve 37 are successively arranged on the medicine inlet pipeline 2. A drainage valve 38 is provided on the drainage pipeline 34, and a second medicine unloading valve 39 is provided on the medicine unloading pipeline 36.

[0037] When it is necessary to store medicine in the medicine storage tank 1, the first medicine unloading valve 37 and the second medicine unloading valve 39 are opened, and the medicine can be transported from an external medicine unloading vehicle through the medicine unloading pipeline 36 and the medicine inlet pipeline 2 to the medicine storage tank 1. In addition, when the medicine storage tank 1 needs to be maintained, cleaned, or in case of an emergency, the emptying valve 29 can be opened to empty the medicine in the medicine storage tank 1. When the medicine leaks, the medicine converges into the pump pit 31. At this time, the water pump 32, the medicine extraction valve 35, and the first medicine unloading valve 37 are opened, and the medicine is lifted to the medicine storage tank 1 for recovery through the water pump 32 via the medicine inlet pipeline 2; when there is accumulated water in the pump pit 31, the water pump 32 and the drainage valve 38 are opened, and the accumulated water is discharged through the drainage pipeline 34. Through this series of designs, the device not only ensures the accurate dosing of the medicine, improves the stability and safety of the system, but also reduces the impact of medicine leakage on the environment.

[0038] Taking the above ideal embodiments of the present invention as an inspiration, it is obvious to those skilled in the art that such embodiments are provided only by way of example. Those skilled in the art will think of many modifications, changes, and alternative ways without departing from the spirit and idea of the present invention. It should be understood that various alternative solutions of the embodiments of the present invention described herein can be adopted in the process of practicing the present invention. The appended claims are intended to define the protection scope of the present invention and thus cover the module compositions, equivalents, or alternative solutions within the protection scope of these claims.

Claims

1. A carbon source dosing device applicable to semi-underground sewage treatment plants, characterized in that, Comprising: A medicine storage tank (1), the medicine storage tank (1) is connected with a medicine inlet pipeline (2), a main dosing pipeline (3) and a vent pipeline (4). A first dosing valve (11), a second dosing valve (15) and a third dosing valve (16) are successively arranged on the main dosing pipeline (3). A pressurization pipeline (14) spanning the second dosing valve (15) is additionally arranged on the main dosing pipeline (3). The ends of a number of dosing branch pipelines (7) with the same structure are connected in parallel to the main dosing pipeline (3). A dosing pump (8) is arranged on the dosing branch pipeline (7). The ends of a number of the dosing branch pipelines (7) are incorporated into a dosing pipe (9) for dosing the water tank, and a flowmeter (10) is arranged on the dosing pipe (9).

2. The carbon source dosing device applicable to a semi-underground sewage treatment plant according to claim 1, wherein: A pre-pressurization pump valve (12), a pressurization pump (5), a post-pressurization pump valve (13) and a pressurization pipeline pressure gauge (6) are successively arranged on the pressurization pipeline (14).

3. The carbon source dosing device applicable to a semi-underground sewage treatment plant according to claim 1, characterized in that: On the main dosing pipeline (3), a flushing pipeline (17) is connected by a tee between the third dosing valve (16) and the dosing branch pipeline (7), and a flushing valve (20) is arranged on the flushing pipeline.

4. The carbon source dosing device applicable to a semi-underground sewage treatment plant according to claim 1, wherein: An inlet valve (18), a filter (19), a dosing pump (8), a pulsation damper (21), a discharge pipeline (22), a branch pipeline pressure gauge (23), a back pressure valve (24) and an outlet valve (25) are successively arranged on the dosing branch pipeline (7). A pulsation damper pressure gauge (26) is installed on the pulsation damper (21). A safety valve (27) is arranged on the discharge pipeline (22), and the outlet of the discharge pipeline (22) is connected to the dosing branch pipeline (7) between the filter (19) and the dosing pump (8).

5. The carbon source dosing device applicable to a semi-underground sewage treatment plant according to claim 1, wherein: A medicine outlet connection valve (28) is arranged on the dosing pipe (9) between adjacent dosing branch pipelines (7), and flowmeters (10) are respectively arranged on the dosing pipes (9) outside the outermost two dosing branch pipelines (7).

6. The carbon source dosing device applicable to a semi-underground sewage treatment plant according to claim 1, characterized in that: A vent valve (29) for controlling the venting of the medicine storage tank (1) is installed on the vent pipeline (4).

7. The carbon source dosing device applicable to a semi-underground sewage treatment plant according to claim 1, wherein: A cofferdam (30) for preventing medicine leakage is arranged around the medicine storage tank (1), a pump pit (31) is arranged inside the cofferdam (30), and a water pump (32) is installed in the pump pit (31).

8. The carbon source dosing device applicable to the semi-underground sewage treatment plant according to claim 7, wherein: A water suction pipeline (33) and a medicine inlet pipeline (2) are connected to the water pump (32). A drain pipeline (34), a medicine extraction valve (35), a medicine unloading pipeline (36) and a first medicine unloading valve (37) are successively arranged on the medicine inlet pipeline (2). A drain valve (38) is arranged on the drain pipeline (34), and a second medicine unloading valve (39) is arranged on the medicine unloading pipeline (36).

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