A multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower

Abstract

This invention discloses a multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower, comprising double-sided filter cloth reoxygenation discs, an inlet pipe, and a support frame. The double-sided filter cloth reoxygenation discs are arranged at intervals from top to bottom on the support frame. Each double-sided filter cloth reoxygenation disc includes a disc body, the outer surface of which is covered with filter cloth. Water passage holes are formed at the bottom of the disc body. The water passage holes of the previous double-sided filter cloth reoxygenation disc are staggered with those of the next. The inlet pipe is located above the double-sided filter cloth reoxygenation discs at the top of the support frame and away from the water passage holes. A water receiving tray is placed at the bottom of the support frame, and an outlet pipe is connected to one side of the water receiving tray. This invention utilizes the double-sided filter cloth to increase the gas-liquid contact area, disperses water into small droplets through the water passage holes, and extends the gas-liquid contact time through a multi-stage staggered arrangement. It achieves efficient reoxygenation and pollutant degradation without external aeration, and has the advantages of simple structure, low energy consumption, and convenient maintenance.

Description

Technical Field

[0001] This invention belongs to the technical field of water treatment equipment, specifically relating to a multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower. Background Technology

[0002] Aeration equipment is the most energy-intensive facility in a wastewater treatment plant, accounting for more than 50% of the plant's total energy consumption. Reoxygenation through aeration is a key area for energy conservation and cost reduction in wastewater treatment plants. Common aeration methods are mainly divided into blower aeration and surface aeration. Blower aeration transports air below the water surface, but its oxygen transfer efficiency is limited due to factors such as motor efficiency, blower efficiency, and resistance losses. Surface aeration breaks up the surface water to increase the contact area with air, but dissolved oxygen is difficult to transfer to deeper water layers.

[0003] Water reoxygenation is a two-phase gas-liquid mass transfer process. According to the two-film theory, improving reoxygenation efficiency can be achieved by increasing the concentration gradient, expanding the mass transfer area, and increasing the mass transfer time. Traditional non-powered or low-powered reoxygenation technologies mainly include cascading aeration or fountain aeration. These two aeration methods only complete one exchange between water and air, and due to the very low saturated dissolved oxygen content in the water, their reoxygenation efficiency is very low. To solve the efficiency problem of traditional non-powered or low-powered reoxygenation technologies, the applicant has proposed various devices for surface water and deep water exchange and reoxygenation. These devices increase the gas-liquid contact area and the rate of dissolved oxygen consumption, thereby increasing the concentration difference and greatly improving reoxygenation efficiency. However, each exchange process in these devices is completed through overflow, and the gas-liquid contact surface in one exchange process is only the upper surface, resulting in a limited contact area.

[0004] To further increase the gas-liquid contact area for surface water and deep water exchange, this invention proposes a multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower. This invention can also increase the gas-liquid two-phase contact time and increase the concentration gradient at the gas-liquid two-phase contact surface. It can continuously absorb oxygen from the air to form dissolved oxygen and continuously consume dissolved oxygen in the water to degrade pollutants. Summary of the Invention

[0005] This invention provides a multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower to solve the problems encountered in the above-mentioned background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower is characterized by comprising double-sided filter cloth reoxygenation discs, an inlet pipe, and a support frame. The double-sided filter cloth reoxygenation discs include a disc body, with filter cloth covering both the upper and lower sides of the disc body. The double-sided filter cloth reoxygenation discs are arranged at intervals from top to bottom on the support frame. A water passage hole is provided at the bottom of each double-sided filter cloth reoxygenation disc. The water passage hole of the previous double-sided filter cloth reoxygenation disc is staggered with the water passage hole of the next double-sided filter cloth reoxygenation disc. The inlet pipe is located above the double-sided filter cloth reoxygenation disc at the top of the support frame and away from its water passage hole. A water receiving tray is placed at the bottom of the support frame, and an outlet pipe is connected to one side of the water receiving tray.

[0007] Furthermore, the projected area of ​​the upper opening of the disc is larger than the projected area of ​​the lower bottom of the disc. When placed on the support, the projected range of the lower bottom of the previous double-sided filter cloth reoxygenation disc is located within the projected range of the upper opening of the next level double-sided filter cloth reoxygenation disc.

[0008] Furthermore, the double-sided filter cloth reoxygenation disc includes a disc body, the outer surface of which is covered with filter cloth.

[0009] Furthermore, the water passages are evenly distributed at one end of the bottom of the disc.

[0010] Furthermore, a bracket is provided at the bottom of the double-sided filter cloth reoxygenation disc near the water passage, giving the double-sided filter cloth reoxygenation disc a certain slope, and the bracket is fixedly connected to the support.

[0011] Furthermore, the bracket is an H-shaped bracket.

[0012] Furthermore, one end of the filter cloth is provided with an opening, and the opening is attached by Velcro.

[0013] Furthermore, the depth of the disc is less than 10 centimeters.

[0014] Furthermore, the filter cloth is one or a combination of several of the following: non-woven fabric, long-pile filter cloth, and fiber filter cloth.

[0015] The present invention has the following beneficial effects: (1) This invention forms a thin layer of water flowing on a shallow plate, and the upper and lower surfaces of the plate are covered with filter cloth, which greatly increases the gas-liquid contact area compared with a single-sided structure. After passing through the upper filter cloth, water passage holes and lower filter cloth, the water is dispersed into small water droplets and falls. In addition, the staggered arrangement of the upper and lower water passage holes prolongs the falling path of the water in the air and the flow time on each plate, thereby effectively improving the mass transfer efficiency of oxygen to water and achieving efficient reoxygenation without external aeration.

[0016] (2) This invention fully utilizes the gravity drop, thin-layer flow and dripping process of water to naturally reoxygenate, without the need for blowers or surface aeration equipment. The energy consumption of the whole machine is significantly reduced compared with the traditional blower aeration process, effectively saving the power consumption and operating cost of sewage treatment.

[0017] (3) The present invention has an opening at one end of the filter cloth and is glued with Velcro, so the disc can be quickly pulled out of the filter cloth for cleaning or replacement without special tools; the bracket and the support are fixedly connected to keep the disc at a stable slope, and the structure is simple, easy to disassemble and assemble, and the daily maintenance workload is small, which greatly improves the overall work efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the double-sided filter cloth re-oxygenation disc of the present invention; Figure 3 This is a side view of the double-sided filter cloth re-oxygenation disc of the present invention; Figure 4 This is a schematic diagram of the structure of multiple double-sided filter cloth re-oxygenation discs of the present invention used in parallel; In the diagram: 1-Double-sided filter cloth reoxygenation disc, 2-Inlet pipe, 3-Support, 4-Water passage hole, 5-Water receiving tray, 6-Outlet pipe, 7-Disc body, 8-Filter cloth, 9-Bracket, 10-Opening, 11-Hook and loop fastener. Detailed Implementation

[0019] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] A multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower, as shown in the attached figure. Figure 1-4As shown, the system includes a double-sided filter cloth reoxygenation disc 1, an inlet pipe 2, and a support 3. The double-sided filter cloth reoxygenation discs 1 are arranged at intervals from top to bottom on the support 3. Each double-sided filter cloth reoxygenation disc 1 includes a disc body 7, with filter cloth 8 covering both the upper and lower surfaces of the disc body 7. Water passage holes 4 are evenly distributed at one end of the bottom of each double-sided filter cloth reoxygenation disc 1. The water passage holes 4 of the previous double-sided filter cloth reoxygenation disc 1 are staggered with those of the next double-sided filter cloth reoxygenation disc 1. The inlet pipe 2 is located above the double-sided filter cloth reoxygenation disc 1 at the top of the support 3 and away from its water passage holes 4. During operation, water enters the double-sided filter cloth reoxygenation disc 1 at the top of the support 3 through the inlet pipe 2. The filter cloth 8 absorbs oxygen from the air to form dissolved oxygen. This dissolved oxygen is consumed by the microorganisms attached to the filter cloth 8 and degrades pollutants in the water. The water passes through the upper filter cloth 8, the water passage 4, and the lower filter cloth 8 in sequence, dripping into the next double-sided filter cloth reoxygenation plate 1 in the form of small water droplets. The small water droplets come into contact with the air, increasing the dissolved oxygen. The dissolved oxygen continues to be consumed by the microorganisms attached to the filter cloth 8 and degrades pollutants in the water. The water flows down to the next double-sided filter cloth reoxygenation plate 1, where the pollutants in the water are degraded. A water receiving plate 5 is placed at the bottom of the support 3. One side of the water receiving plate 5 is connected to a water outlet pipe 6. The water receiving plate 5 is used to collect the water that has been finally filtered by the filter cloth and discharges it through the water outlet pipe 6 for collection.

[0021] The upper opening projection area of ​​the disc body 7 is larger than the lower bottom projection area. When placed on the bracket 3, the projection range of the lower bottom of the previous double-sided filter cloth reoxygenation disc 1 is within the upper opening projection range of the next level double-sided filter cloth reoxygenation disc 1.

[0022] A bracket 9 is provided at the bottom of the double-sided filter cloth reoxygenation disc 1 near the water passage hole 4. In this embodiment, the bracket 9 is an H-shaped bracket. This arrangement gives the double-sided filter cloth reoxygenation disc 1 a certain slope. The bracket 9 is fixedly connected to the support 3, that is, the bottom height of the double-sided filter cloth reoxygenation disc 1 near the water passage hole 4 is higher than the height of the end of the double-sided filter cloth reoxygenation disc 1 away from the water passage hole 4. This allows the water in the disc 7 to flow slowly towards the water passage hole 4, so that the microorganisms attached to the filter cloth 8 can more fully degrade pollutants in the water. On the other hand, it can ensure the stability of the double-sided filter cloth reoxygenation disc 1.

[0023] The filter cloth 8 has an opening 10 at one end, and the opening 10 is attached by Velcro 11. Specifically, the hook side of the Velcro 11 is fixed to the filter cloth on one side of the opening, and the loop side is fixed to the filter cloth on the other side of the opening. This facilitates disassembly, maintenance, cleaning, and removal of the disc 7 inside the filter cloth 8.

[0024] The depth of the disc 7 is less than 10 cm; the purpose of this design is that the shallow depth of the water can effectively increase the contact area and contact time between the water and the air, improve the reoxygenation efficiency of the water, and continuously absorb oxygen from the air to form dissolved oxygen.

[0025] The filter cloth 8 is one or a combination of non-woven fabric, long-pile filter cloth, and fiber filter cloth.

[0026] It should be noted that, in order to improve degradation efficiency, the double-sided filter cloth reoxygenation disc 1 can be arranged side by side in each layer of the support 3. Correspondingly, the water receiving disc 5 can also be arranged side by side or replaced with a water receiving disc 5 that is compatible with the double-sided filter cloth reoxygenation disc 1 arranged side by side.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower, characterized in that, The system includes a double-sided filter cloth reoxygenation disc (1), an inlet pipe (2), and a support (3). The double-sided filter cloth reoxygenation disc (1) includes a disc body (7), and both the upper and lower sides of the disc body (7) are covered with filter cloth (8). The double-sided filter cloth reoxygenation discs (1) are arranged on the support (3) from top to bottom at intervals. The bottom of the double-sided filter cloth reoxygenation disc (1) has a water passage hole (4). The water passage hole (4) of the previous double-sided filter cloth reoxygenation disc (1) is staggered with the water passage hole (4) of the next double-sided filter cloth reoxygenation disc (1). The inlet pipe (2) is located above the double-sided filter cloth reoxygenation disc (1) at the top of the support (3) and away from its water passage hole (4). A water receiving plate (5) is placed at the bottom of the support (3), and an outlet pipe (6) is connected to one side of the water receiving plate (5).

2. The multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower according to claim 1, characterized in that, The upper opening projection area of ​​the disc body (7) is larger than the lower bottom projection area. When placed on the bracket (3), the projection range of the lower bottom of the previous double-sided filter cloth reoxygenation disc (1) is within the upper opening projection range of the next level double-sided filter cloth reoxygenation disc (1).

3. The multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower according to claim 1, characterized in that, The water passage holes (4) are evenly distributed at one end of the bottom of the plate (7).

4. The multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower according to claim 1, characterized in that, The double-sided filter cloth reoxygenation disc (1) has a bracket (9) at the bottom of one end near the water passage (4), so that the double-sided filter cloth reoxygenation disc (1) has a certain slope, and the bracket (9) is fixedly connected to the support (3).

5. The multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower according to claim 4, characterized in that, The bracket (9) is an H-type bracket.

6. The multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower according to claim 1, characterized in that, The filter cloth (8) has an opening (10) at one end, and the opening (10) is attached by Velcro (11).

7. The multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower according to claim 1, characterized in that, The depth of the disc (7) is less than 10 cm.

8. The multi-stage double-sided filter cloth reoxygenation disc biological contact oxidation tower according to claim 1, characterized in that, The filter cloth (8) is one or a combination of non-woven fabric, long-pile filter cloth, and fiber filter cloth.

Images