Air pipe cooling device of aeration fan

Abstract

The utility model discloses an aeration fan air pipe cooling device which comprises a cooling tower (1) and a circulating pipeline (2), a water pan (3) is arranged below a water outlet of the cooling tower (1), the circulating pipeline (2) is arranged at the bottom of the water pan (3), one end of the circulating pipeline (2) is connected with a water inlet of the cooling tower (1), and a water pump (4) and a cooling sleeve (5) are arranged on the circulating pipeline (2). An air pipe (6) of an aeration fan penetrates through the cooling sleeve (5), and a cooling cavity (7) is formed between the cooling sleeve (5) and the air pipe (6); the bottom of the water pan (3) is sunken downwards to form a water flow collecting bin (8), and the circulating pipeline (2) is connected to the collecting bin (8). The leachate treatment device has the advantage that the leachate treatment speed can be increased.

Description

Technical Field

[0001] The utility model belongs to the field of sewage treatment equipment, and particularly relates to an air duct cooling device for an aeration fan used in sewage treatment. Background Technique

[0002] Leachate is one of the common types of sewage. One of the commonly used equipment for leachate treatment is a biochemical tank. Bacteria in the biochemical tank are used to decompose organic matter in the leachate. A large amount of oxygen is consumed during the decomposition process. Therefore, an aeration fan needs to be set up. The air duct of the aeration fan introduces a large amount of air into the bottom of the biochemical tank to supplement the oxygen consumption of the biochemical reaction. To establish a good biochemical reaction, not only sufficient oxygen is required in the water body, but also the water body needs to maintain an appropriate temperature to prevent the decline or even death of bacterial activity. Especially in the high-temperature season in summer, the water temperature in the biochemical tank is high, which is not conducive to the stable operation of the biochemical system and needs to be cooled. The commonly used cooling equipment is a cooling tower set in the biochemical tank.

[0003] In the prior art, the cooling tower keeps the overall temperature of the biochemical tank from being too high, and the aeration fan makes the oxygen in the biochemical tank sufficient, providing relatively good conditions for the biochemical reaction treatment. However, there are still some deficiencies. The main problem is that the aeration fan has a large wind pressure during operation. After the air is compressed to a certain extent and enters the biochemical tank, heat is generated during the air compression itself. Coupled with the large motor power of the aeration fan, the motor heat also enters the biochemical tank along with the air, resulting in too high local temperature in the biochemical tank, mainly concentrated at the air outlet of the air duct. After actual measurement, the temperature of the air just discharged from the aeration fan can reach up to 90 °C at the highest, causing a large number of biochemical bacteria at the air outlet to die, reducing the treatment speed of the leachate. Content of the Utility Model

[0004] The purpose of the utility model is to provide an air duct cooling device for an aeration fan. The utility model has the advantage of being able to improve the treatment speed of leachate.

[0005] The technical solution of the utility model: An air duct cooling device for an aeration fan includes a cooling tower and a circulation pipeline. A water receiving tray is arranged below the water outlet of the cooling tower. A circulation pipeline is arranged at the bottom of the water receiving tray. One end of the circulation pipeline is connected to the water inlet of the cooling tower. A water pump and a cooling sleeve are arranged on the circulation pipeline. The cooling sleeve is penetrated by the air duct of the aeration fan, and a cooling cavity is formed between the cooling sleeve and the air duct.

[0006] In the aforementioned air duct cooling device for an aeration fan, the bottom of the water receiving tray is recessed downward to form a water collection bin, and the circulation pipeline is connected to the water collection bin.

[0007] In the aforementioned aeration blower air duct cooling device, the cooling sleeve comprises two strip-shaped shells with semi-circular cross-sections. Flange plates extend outwardly from both radial sides of the shells. A rubber plate is provided on one side of the flange plates. Fasteners passing through the corresponding flange plates are provided between the two shells.

[0008] In the aforementioned aeration blower air duct cooling device, a support member is provided inside the shell, and the support member keeps the cooling sleeve coaxial with the air duct.

[0009] In the aforementioned aeration blower air duct cooling device, sealing rings are provided at both ends of the cooling sleeve. A plurality of annular first lips are provided inside the sealing rings. The sealing rings are elastically connected to the air duct through the first lips. An annular groove into which the cooling sleeve is tightly inserted is provided on the sealing ring, and a plurality of annular second lips are provided on both inner walls of the annular groove.

[0010] In the aforementioned aeration blower air duct cooling device, a hoop is provided on the outer peripheral surface of the sealing ring.

[0011] In the aforementioned aeration blower air duct cooling device, the length of the cooling sleeve is more than 10 meters.

[0012] Compared with the prior art, the utility model utilizes the relatively low-temperature leachate discharged from the cooling tower that is originally equipped on the biochemical tank, and through a water pump and the cooling sleeve, the low-temperature water flows through the outside of the air duct to cool the hot air inside the air duct, avoiding the local high temperature of the biochemical tank caused by the high temperature at the air outlet of the air duct, avoiding the death and reduction of activity of biochemical bacteria, and improving the treatment speed of the leachate. Therefore, the utility model has the advantage of being able to improve the treatment speed of the leachate.

[0013] In addition, through the structural optimization of the cooling sleeve, on the basis of ensuring good sealing performance of the cold zone sleeve, avoiding the leakage of leachate to the ground and avoiding the pollution of the factory area ground, the cooling sleeve is easy to disassemble. When impurities and scaling ions in the leachate accumulate in the cooling cavity, it is convenient for workers to remove the cooling sleeve and clean the impurities therein to avoid blockage, and the maintenance is relatively convenient. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the utility model.

[0015] Figure 2 is a schematic radial cross-sectional view of the cooling sleeve.

[0016] Figure 3 is a schematic axial cross-sectional view of the cooling sleeve.

[0017] The marks in the accompanying drawings are: 1-cooling tower, 2-circulation pipe, 3-water tray, 4-water pump, 5-cooling jacket, 6-air duct, 7-cooling chamber, 8-collecting bin, 9-shell, 10-flange plate, 11-rubber plate, 12-fastener, 13-support, 14-sealing ring, 15-first lip, 16-annular groove, 17-second lip, 18-hoop. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0019] Embodiment. An aeration fan duct cooling device, such as Figure 1 As shown, the cooling tower 1 and the circulation pipe 2 are included. The cooling tower 1 is the original equipment in the biochemical pool. The leachate in the biochemical pool is pumped into the cooling tower 1. The leachate enters from the water inlet of the cooling tower 1, flows downward, passes through the filler, and forms a water film. The fan at the top of the cooling tower 1 forms an upward airflow, which evaporates the water film and takes away heat, rapidly cooling the leachate. The leachate is discharged from the water outlet at the bottom of the cooling tower 1 and flows back into the biochemical pool. The continuous circulation cools the leachate in the biochemical pool. The water loss of the leachate during the process of passing through the cooling tower can reach 5%. The cooling tower 1 currently on the market has a wide-mouthed outlet, which is more helpful to prevent blockage and increase the evaporation area of the leachate.

[0020] Below the water outlet of cooling tower 1 is a wide-mouthed water collection pan 3 with a recessed bottom, forming a water collection chamber 8. This chamber 8 is connected to the water inlet of cooling tower 1 via a circulation pipe 2. Circulation pipe 2 is equipped with a water pump 4 and a cooling jacket 5. The cooling jacket 5 is 20 meters long and is passed through a PVC duct 6 for the aeration fan. A cooling chamber 7 is formed between the cooling jacket 5 and the duct 6. The water collection pan 3 collects a portion of the lower-temperature leachate discharged from the cooling tower and collects it in the collection chamber 8. The water pump then pumps the leachate through the cold zone duct 5 and returns it to cooling tower 1. During this process, the air in the duct 6 is cooled, cooling it before being blown into the water at the bottom of the biochemical pool. The remaining leachate discharged from cooling tower 1 is returned to the biochemical pool. Field tests have shown that even in hot weather, the temperature of the air discharged from the duct 6 can be reduced to around 50°C.

[0021] The cooling jacket 5 includes two long shells 9 with semicircular cross-sections. A plurality of supports 13 are provided on the inner side of the shells 9. The supports 13 keep the cooling jacket 5 coaxial with the air duct 6. Both radial sides of the shells 9 extend outward to form flange plates 10. A rubber plate 11 is provided on one side of the flange plate 10. A fastener 12 is provided between the two shells 9 and passes through the corresponding flange plates 10. The fastener 12 consists of a bolt and a nut.

[0022] Both ends of the cooling sleeve 5 are provided with sealing rings 14 made of rubber. A hoop 18 is provided on the outer peripheral surface of the sealing ring 14. A plurality of annular first lips 15 are provided on the inner side of the sealing ring 14. The sealing ring 14 is elastically connected to the air duct 6 through the first lips 15. An annular groove 16 into which the cooling sleeve 5 is tightly inserted is provided on the sealing ring 14. A plurality of annular second lips 17 are provided on both inner walls of the annular groove 16.

[0023] The present utility model is a technical solution proposed in response to the problems found in the actual production and operation process. It is used in the plant renovation project. The relatively low-temperature leachate discharged from the original cooling tower in the biochemical pool is used to cool the hot air in the air duct. The heated leachate then returns to the cooling tower, without increasing the water temperature in the biochemical pool, creating good conditions for the survival and activity improvement of the biochemical strains in the biochemical pool. The renovation cost is low, and it has good practicability.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", 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 therefore should not be construed as a limitation to the present utility model.

Claims

1. An aeration fan air duct cooling device, characterized in that: It includes a cooling tower (1) and a circulating pipeline (2). Below the water outlet of the cooling tower (1), there is a water receiving tray (3). At the bottom of the water receiving tray (3), there is a circulating pipeline (2). One end of the circulating pipeline (2) is connected to the water inlet of the cooling tower (1). A water pump (4) and a cooling sleeve (5) are provided on the circulating pipeline (2). The cooling sleeve (5) is penetrated by the air duct (6) of an aeration fan, and a cooling chamber (7) is formed between the cooling sleeve (5) and the air duct (6).

2. The aeration fan air duct cooling device according to claim 1, characterized in that: The bottom of the water receiving tray (3) is recessed downward to form a water collection bin (8) for water flow, and the circulating pipeline (2) is connected to the water collection bin (8).

3. The aeration blower air duct cooling device according to claim 1, wherein: The cooling sleeve (5) includes two strip-shaped shells (9) with semicircular cross-sections. On both radial sides of the shell (9), flange plates (10) extend outward. On one side of the flange plate (10), there is a rubber plate (11). Fasteners (12) passing through the corresponding flange plates (10) are provided between the two shells (9).

4. The aeration fan air duct cooling device according to claim 3, characterized in that: Supporting members (13) are provided inside the shell (9), and the supporting members (13) keep the cooling sleeve (5) and the air duct (6) coaxial.

5. The aeration blower air duct cooling device according to claim 4, wherein: Sealing rings (14) are provided at both ends of the cooling sleeve (5). Inside the sealing ring (14), there are multiple annular first lips (15). The sealing ring (14) is elastically connected to the air duct (6) through the first lips (15). An annular groove (16) into which the cooling sleeve (5) is tightly inserted is provided on the sealing ring (14). On both inner walls of the annular groove (16), there are multiple annular second lips (17).

6. The aeration fan air duct cooling device according to claim 5, wherein: A hoop (18) is provided on the outer peripheral surface of the sealing ring (14).

7. The aeration blower air duct cooling device according to claim 1, wherein: The length of the cooling sleeve (5) is more than 10 meters.

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