Tail gas recycling device

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a tail gas recycling device which comprises a closed reactor, first gas pipes are arranged at the bottom of the closed reactor at intervals, first ultramicro bubble generators are arranged on the upper sides of the first gas pipes at intervals, and second gas pipes are arranged between the adjacent first gas pipes. One end of the second air pipe is sealed, the other end of the second air pipe penetrates through the side wall of the closed reactor and then is connected with a connecting pipe, a first air pump is arranged on the connecting pipe, and the end, away from the second air pipe, of the connecting pipe penetrates through the side wall of the upper portion of the closed reactor; a collection cover with a downward opening is arranged right above the second air pipe, an exhaust pipe is arranged on the upper side of the collection cover, one end of the exhaust pipe is communicated with the interior of the collection cover, the other end of the exhaust pipe penetrates through the side wall of the closed reactor, and a second air pump is arranged on the exhaust pipe located outside.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a tail gas recovery and utilization device. Background Technology

[0002] In traditional wastewater treatment processes, the application of high-purity oxygen is often limited due to insufficient mass transfer efficiency. Existing aeration systems typically employ injection, but in practice, significant coalescence of air bubbles in the liquid phase drastically reduces the gas-liquid contact area. This coalescence effect severely reduces oxygen dissolution efficiency, resulting in low oxygen utilization. Utility Model Content

[0003] To address the aforementioned technical shortcomings, this invention provides a tail gas recovery and utilization device that can improve the utilization rate of high-purity oxygen during wastewater treatment.

[0004] This utility model discloses a tail gas recovery and utilization device, including a closed reactor, a first microbubble generator, a second microbubble generator, a first gas pipe, a second gas pipe, an exhaust pipe, a connecting pipe, a first air pump, a second air pump, an oxygen supply device, and a collection hood. Parallel first gas pipes are arranged at intervals at the bottom of the closed reactor. One end of the first gas pipe is sealed, and the other end passes through the side wall of the closed reactor and connects to the oxygen supply device. First microbubble generators are evenly spaced along the length of the first gas pipes. A second gas pipe is arranged between adjacent first gas pipes, parallel to the first gas pipes. Two microbubble generators are evenly spaced along the length of the upper side. One end of the second gas pipe is sealed, and the other end of the second gas pipe passes through the side wall of the closed reactor and connects to the connecting pipe. A first gas pump is installed on the connecting pipe. The end of the connecting pipe away from the second gas pipe passes through the upper side wall of the closed reactor and is located inside the closed reactor. A collection hood with its opening facing downward is installed directly above the second gas pipe. The collection hood is fixed to the side wall of the closed reactor. An exhaust pipe is installed on the upper side of the collection hood. One end of the exhaust pipe is connected to the inside of the collection hood, and the other end of the exhaust pipe passes through the side wall of the closed reactor and is located outside. A second gas pump is installed on the exhaust pipe located outside.

[0005] The principle of this exhaust gas recovery and utilization device is to generate microbubbles through the No. 1 and No. 2 microbubble generators in a closed reactor, which efficiently transfer mass in the liquid phase. Oxygen is introduced through the No. 1 gas pipe and generated by the No. 1 microbubble generator to dissolve oxygen. The No. 1 gas pump circulates the exhaust gas with a still high oxygen content through the connecting pipe and the No. 2 gas pipe to the No. 2 microbubble generator to generate microbubbles to dissolve oxygen a second time. The collection hood is located above the No. 2 gas pipe. The No. 2 gas pump draws in the exhaust gas with a lower oxygen content from the collection hood for discharge, preventing the mixing of the two exhaust gases.

[0006] Furthermore, a cold water pipe is wound around the connecting pipe, and cooling water flows through the cold water pipe. The temperature of the exhaust gas, which still has a high oxygen content, is appropriately reduced through the cold water pipe, thereby improving the mass transfer efficiency of the microbubbles.

[0007] The exhaust gas recovery and utilization device obtained by this utility model has the following beneficial effects: by passing the exhaust gas with a still relatively high oxygen content through the No. 2 microbubble generator to generate microbubbles for oxygen dissolution, the newly generated microbubbles have a large gas-liquid contact area, which effectively improves oxygen dissolution. Moreover, by using the No. 2 air pump to draw and discharge the exhaust gas with a lower oxygen content in the absorption hood, the mixing of the two exhaust gases is prevented, which indirectly increases the oxygen content in the secondary generated microbubbles, thereby improving the oxygen dissolution rate. Attached Figure Description

[0008] Figure 1 This is a front view and sectional view of Embodiment 1 of this utility model;

[0009] Figure 2 This is Embodiment 1 of the present utility model. Figure 1 Cross-sectional view of AA (oxygen supply device not shown). Detailed Implementation

[0010] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0011] Example 1:

[0012] like Figure 1 , 2As shown, this utility model discloses a tail gas recovery and utilization device, including a closed reactor 1, a first microbubble generator 2, a second microbubble generator 4, a first gas pipe 3, a second gas pipe 5, an exhaust pipe 7, a connecting pipe 9, a first air pump 10, a second air pump 11, an oxygen supply device, and a collection hood 6. First gas pipes 3 are arranged parallel to each other at intervals at the bottom of the closed reactor 1. One end of the first gas pipe 3 is sealed, and the other end passes through the side wall of the closed reactor 1 and connects to the oxygen supply device. First microbubble generators 2 are evenly spaced along the length of the upper side of the first gas pipe 3. Second gas pipes 5 are arranged between adjacent first gas pipes 3, parallel to the first gas pipes 3. Second gas pipes 5 are evenly spaced along the length of the upper side of the second gas pipes 5. A second microbubble generator 4 is installed. One end of the second gas pipe 5 is sealed, and the other end of the second gas pipe 5 passes through the side wall of the closed reactor 1 and is connected to the connecting pipe 9. A first gas pump 10 is installed on the connecting pipe 9. The end of the connecting pipe 9 away from the second gas pipe 5 passes through the upper side wall of the closed reactor 1 and is located inside the closed reactor 1. A cold water pipe 8 is wound around the connecting pipe 9, and cooling water flows through the cold water pipe 8. A collection hood 6 with its opening facing downward is installed directly above the second gas pipe 5. The collection hood 6 is fixed to the side wall of the closed reactor 1. An exhaust pipe 7 is installed on the upper side of the collection hood 6. One end of the exhaust pipe 7 is connected to the inside of the collection hood 6, and the other end of the exhaust pipe 7 passes through the side wall of the closed reactor 1 and is located outside. A second gas pump 11 is installed on the exhaust pipe 7 located outside.

[0013] The principle of this exhaust gas recovery and utilization device is to generate microbubbles through the No. 1 microbubble generator 2 and the No. 2 microbubble generator 4 in the closed reactor 1, which efficiently transfer mass in the liquid phase. Oxygen is introduced through the No. 1 gas pipe 3 and generated by the No. 1 microbubble generator 2 to dissolve oxygen. The No. 1 gas pump 10 circulates the exhaust gas with a still high oxygen content through the connecting pipe 9 and the No. 2 gas pipe 5 to the No. 2 microbubble generator 4 to generate microbubbles to dissolve oxygen. The collection hood 6 is located above the No. 2 gas pipe 5. The No. 2 gas pump 11 draws and discharges the exhaust gas with a lower oxygen content in the collection hood 6 to prevent the mixing of the two exhaust gases.

Claims

1. A tail gas recovery and utilization device, characterized in that, The system includes a closed reactor (1), a first microbubble generator (2), a second microbubble generator (4), a first gas pipe (3), a second gas pipe (5), an exhaust pipe (7), a connecting pipe (9), a first air pump (10), a second air pump (11), an oxygen supply device, and a collection hood (6). The bottom of the closed reactor (1) has parallel first gas pipes (3) arranged at intervals. One end of the first gas pipe (3) is sealed, and the other end passes through the side wall of the closed reactor (1) and connects to the oxygen supply device. First microbubble generators (2) are evenly spaced along the length of the first gas pipe (3). Second gas pipes (5) are arranged between adjacent first gas pipes (3), parallel to the first gas pipes (3). The upper side of the second gas pipes (5) is evenly spaced along its length. A second microbubble generator (4) is installed. One end of the second gas pipe (5) is sealed. The other end of the second gas pipe (5) passes through the side wall of the closed reactor (1) and is connected to the connecting pipe (9). A first gas pump (10) is installed on the connecting pipe (9). The end of the connecting pipe (9) away from the second gas pipe (5) passes through the upper side wall of the closed reactor (1) and is located inside the closed reactor (1). A collection hood (6) with its opening facing downward is installed directly above the second gas pipe (5). The collection hood (6) is fixed to the side wall of the closed reactor (1). An exhaust pipe (7) is installed on the upper side of the collection hood (6). One end of the exhaust pipe (7) is connected to the inside of the collection hood (6). The other end of the exhaust pipe (7) passes through the side wall of the closed reactor (1) and is located outside. A second gas pump (11) is installed on the exhaust pipe (7) located outside.

2. The exhaust gas recovery and utilization device according to claim 1, characterized in that, A cold water pipe (8) is wound around the connecting pipe (9), and cooling water flows through the cold water pipe (8).

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