Automatic circulating device

Abstract

The utility model discloses an automatic circulating device which comprises a denitrification tower and a conveying pipeline, denitrification liquid is arranged in the denitrification tower, one end of the conveying pipeline is connected with the denitrification liquid, and the other end of the conveying pipeline is communicated with the inside of the denitrification tower; the system further comprises a PH detection device, a sulfuric acid pool, a carbon source pool, a variable-frequency circulating pump system and a flow meter. The PH detection device, the sulfuric acid tank, the carbon source tank, the variable-frequency circulating pump system and the flow meter are sequentially arranged on the conveying pipeline along the flow direction of denitrification liquid; a first electrically operated valve and a second electrically operated valve are respectively arranged at the joints of the sulfuric acid tank and the carbon source tank with the conveying pipeline, and the PH detection device is electrically connected with the first electrically operated valve and the second electrically operated valve. According to the utility model, the PH detection device is arranged to carry out PH detection on the denitrification liquid in the conveying pipeline, and the first electric valve and the second electric valve are timely controlled to be opened and closed through electric signals, so that the liquid medicine can be conveniently added into the conveying pipeline, the denitrification reaction effect is ensured, and frequent manual intervention is not needed.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to an automated circulation device. Background Technology

[0002] In wastewater treatment and related fields, denitrification is crucial for removing nitrate nitrogen from water. As a key piece of equipment in this process, the denitrification tower's operating efficiency and stability directly impact wastewater treatment effectiveness. Traditional denitrification towers suffer from several operational problems, such as insufficient automation of the circulation process, requiring frequent manual intervention.

[0003] In the prior art, utility model patent CN201820701836.8 discloses a high-efficiency denitrification reactor for use in wastewater treatment systems, which solves the problems of large footprint, high investment and operating costs, and low efficiency and poor effect of denitrification in existing technologies. This high-efficiency denitrification reactor for use in wastewater treatment systems includes a denitrification reaction tower, a wastewater distribution pipe, a denitrification denitrification device, a wastewater external extraction pipe, a circulation pipe, a circulation pump, and a three-phase separator. An activated sludge suspension zone is formed inside the denitrification reaction tower between the wastewater distribution pipe and the denitrification denitrification device. A sludge discharge port is provided at the bottom side of the denitrification reaction tower for discharging sludge from the tower. An exhaust port connected to the gas phase separation zone at the top of the three-phase separator is located directly above the denitrification reaction tower. A wastewater outlet connected to the wastewater clarification zone of the three-phase separator is located at the top side of the denitrification reaction tower.

[0004] The aforementioned patent provides a high-efficiency denitrification reactor for use in wastewater treatment systems, which features a small footprint, low investment and operating costs, and high denitrification efficiency and good effect. However, during the circulation process of the denitrification tower, the pH value of the denitrification liquid will change with the denitrification reaction, affecting the effect of the denitrification reaction. Although the device can circulate automatically, it still requires frequent manual intervention and needs further improvement. Utility Model Content

[0005] The purpose of this invention is to provide an automated circulation device, which aims to improve the existing denitrification tower. Although the circulation process can be automated, the pH value of the denitrification liquid changes with the denitrification reaction, affecting the denitrification effect and still requiring frequent manual intervention.

[0006] This utility model is implemented as follows: An automated circulation device includes a denitrification tower and a conveying pipeline. The denitrification tower contains denitrifying liquid, and one end of the conveying pipeline is connected to the denitrifying liquid, while the other end is connected to the interior of the denitrification tower. It also includes a pH detection device, a sulfuric acid tank, a carbon source tank, a variable frequency circulation pump system, and a flow meter. The pH detection device, sulfuric acid tank, carbon source tank, variable frequency circulation pump system, and flow meter are sequentially arranged on the conveying pipeline along the flow direction of the denitrifying liquid. A first electric valve and a second electric valve are respectively installed at the connection points of the sulfuric acid tank, carbon source tank, and conveying pipeline. The pH detection device is electrically connected to both the first and second electric valves.

[0007] Preferably, the pH detection device includes a ball valve, the pH detection devices are arranged in parallel on the delivery pipeline, and ball valves located on both sides of the pH detection device are provided on the parallel pipeline of the pH detection devices.

[0008] Preferably, it also includes a drain valve, which is provided on the parallel pipeline of the pH detection device.

[0009] Preferably, the variable frequency circulating pump system includes a first circulating pump and a second circulating pump, which are arranged in parallel.

[0010] Preferably, the pump also includes butterfly valves, with butterfly valves provided on both sides of the first and second circulation pumps.

[0011] Preferably, the butterfly valve is a DN250 butterfly valve; the first electric valve is a DN15 automatic control valve.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model uses a pH detection device to detect the pH of the denitrification liquid in the delivery pipeline, and uses electrical signals to control the opening and closing of the first and second electric valves in a timely manner. This facilitates the addition of chemicals to the delivery pipeline, ensures the effectiveness of the denitrification reaction, and eliminates the need for frequent manual intervention.

[0014] 2. By setting up a first circulation pump and a second circulation pump in parallel, with one circulation pump in standby mode and the other in use, this utility model can prevent damage to the circulation pump from affecting the normal progress of the denitrification reaction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the connection structure of the device of this utility model.

[0016] In the diagram: 1. Denitrification tower; 2. Denitrification liquid; 3. Delivery pipeline; 4. pH detection device; 5. Ball valve; 6. Sulfuric acid tank; 7. Carbon source tank; 8. First electric valve; 9. Second electric valve; 10. Variable frequency circulating pump system; 11. First circulating pump; 12. Second circulating pump; 13. Butterfly valve; 14. Flow meter; 15. Drain valve. Detailed Implementation

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0019] Example 1

[0020] like Figure 1As shown, an automated circulation device includes a denitrification tower 1 and a delivery pipeline 3. The denitrification tower 1 contains denitrification liquid 2. One end of the delivery pipeline 3 is connected to the denitrification liquid 2, and the other end is connected to the interior of the denitrification tower 1. It also includes a pH detection device 4, a sulfuric acid tank 6, a carbon source tank 7, a variable frequency circulation pump system 10, and a flow meter 14. The pH detection device 4, sulfuric acid tank 6, carbon source tank 7, variable frequency circulation pump system 10, and flow meter 14 are sequentially arranged on the delivery pipeline 3 along the flow direction of the denitrification liquid 2. The variable frequency circulation pump system 10 includes a first circulation pump 11 and a second circulation pump 12, which are arranged side-by-side. By arranging two circulation pumps side-by-side, one can be used as a backup, preventing damage to the circulation pump during operation and ensuring continued operation. Additionally, it includes butterfly valves 13, with butterfly valves 13 installed on both sides of the first circulation pump 11 and the second circulation pump 12. The butterfly valves 13 can control the opening and closing of the corresponding circulation pump pipeline without affecting the normal operation of the other circulation pump pipeline. A first electric valve 8 and a second electric valve 9 are respectively installed at the connection points of the sulfuric acid tank 6, the carbon source tank 7, and the conveying pipeline 3. A pH detection device 4 is electrically connected to both the first electric valve 8 and the second electric valve 9. The pH detection device 4 can detect the pH of the denitrification liquid 2 in the conveying pipeline 3 and control the opening and closing of the first electric valve 8 and the second electric valve 9 based on the pH detection result, facilitating the injection of chemical solution into the conveying pipeline 3 and adjusting the pH value of the denitrification liquid 2. The pH detection device 4 includes ball valves 5, which are arranged in parallel on the conveying pipeline 3. Ball valves 5 are located on both sides of the pH detection device 4 on the parallel pipeline. It also includes a drain valve 15, which extends from the parallel pipeline of the pH detection device 4. The butterfly valve 13 is a DN250 butterfly valve; the first electric valve 8 is a DN15 self-regulating valve.

[0021] Example 2

[0022] like Figure 1As shown, an automated circulation device includes a denitrification tower 1 and a conveying pipeline 3. The denitrification tower 1 contains denitrification liquid 2. One end of the conveying pipeline 3 is connected to the denitrification liquid 2, and the other end is connected to the interior of the denitrification tower 1. It also includes a pH detection device 4, a sulfuric acid tank 6, a carbon source tank 7, a variable frequency circulation pump system 10, and a flow meter 14. The pH detection device 4, sulfuric acid tank 6, carbon source tank 7, variable frequency circulation pump system 10, and flow meter 14 are sequentially arranged on the conveying pipeline 3 along the flow direction of the denitrification liquid 2. The variable frequency circulation pump system 10 includes a first circulation pump 11 and a second circulation pump 12, arranged side-by-side. It also includes butterfly valves 13, with butterfly valves 13 installed on both sides of the first circulation pump 11 and the second circulation pump 12. A first electric valve 8 and a second electric valve 9 are respectively installed at the connection points between the sulfuric acid tank 6 and the carbon source tank 7 and the conveying pipeline 3. The pH detection device 4 is electrically connected to both the first electric valve 8 and the second electric valve 9. The pH detection device 4 includes ball valves 5, which are arranged in parallel on the delivery pipeline 3. Ball valves 5 are located on both sides of the pH detection device 4 on the parallel pipeline. It also includes a drain valve 15, which extends from the parallel pipeline of the pH detection device 4. The butterfly valve 13 is a DN250 butterfly valve; the first electric valve 8 is a DN15 automatic control valve.

[0023] The working principle of this utility model is as follows: Denitrification liquid 2 is transported through conveying pipeline 3, and the pH value of denitrification liquid 2 is detected by pH detection device 4. When the pH value changes, the first electric valve 8 and the second electric valve 9 can be opened and closed by electrical signal to facilitate the addition of chemical solution to conveying pipeline 3 and timely change the pH value of denitrification liquid 2. Then, the first circulation pump 11 and the second circulation pump 12 are started by butterfly valve 13 to make denitrification liquid 2 circulate in denitrification tower 1, and the flow rate of denitrification liquid 2 is detected in time by flow meter 14.

[0024] In summary, this invention uses a pH detection device 4 to detect the pH of the denitrification liquid 2 in the delivery pipeline 3, and uses electrical signals to control the opening and closing of the first electric valve 8 and the second electric valve 9 in a timely manner. This facilitates the addition of chemicals to the delivery pipeline 3, ensures the effectiveness of the denitrification reaction, and eliminates the need for frequent manual intervention. By setting up a first circulation pump 11 and a second circulation pump 12 in parallel, with one pump in standby mode, damage to the circulation pumps can prevent them from affecting the normal progress of the denitrification reaction.

[0025] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automated circulation device, comprising a denitrification tower (1) and a conveying pipeline (3), wherein a denitrification liquid (2) is disposed in the denitrification tower (1), and one end of the conveying pipeline (3) is connected to the denitrification liquid (2), and the other end is connected to the interior of the denitrification tower (1); characterized in that, It also includes a pH detection device (4), a sulfuric acid tank (6), a carbon source tank (7), a variable frequency circulating pump system (10), and a flow meter (14); the pH detection device (4), the sulfuric acid tank (6), the carbon source tank (7), the variable frequency circulating pump system (10), and the flow meter (14) are sequentially arranged on the conveying pipeline (3) along the flow direction of the denitrification liquid (2); a first electric valve (8) and a second electric valve (9) are respectively provided at the connection between the sulfuric acid tank (6), the carbon source tank (7), and the conveying pipeline (3), and the pH detection device (4) is electrically connected to the first electric valve (8) and the second electric valve (9).

2. The automated circulation device according to claim 1, characterized in that, The pH detection device (4) includes a ball valve (5). The pH detection devices (4) are arranged in parallel on the delivery pipeline (3). Ball valves (5) located on both sides of the pH detection devices (4) are provided on the parallel pipeline of the pH detection devices (4).

3. The automated circulation device according to claim 2, characterized in that, It also includes a drain valve (15), which is provided on the parallel pipeline of the pH detection device (4).

4. An automated circulation device according to claim 1, characterized in that, The variable frequency circulating pump system (10) includes a first circulating pump (11) and a second circulating pump (12), which are arranged side by side.

5. An automated circulation device according to claim 4, characterized in that, In addition, a butterfly valve (13) is provided on both sides of the first circulation pump (11) and the second circulation pump (12).

6. An automated circulation device according to claim 5, characterized in that, The butterfly valve (13) is a DN250 butterfly valve; the first electric valve (8) is a DN15 self-control valve.

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