A continuous oil-polluted water treatment device

Abstract

This invention relates to a continuous oily wastewater treatment device, comprising an oil removal unit, an ozone oxidation treatment unit, a membrane bioreactor unit, and a biological aerated filter treatment unit. These units are sequentially connected via corresponding pipelines. The biological aerated filter treatment unit includes an aeration tank body, within which a biological packing material is detachably installed. First branch pipes are respectively installed on both sides of the aeration tank body, and multiple second branch pipes are fixedly installed on each first branch pipe. Each second branch pipe is equipped with an aeration head and a detection device for identifying whether the aeration head is clogged. An auxiliary disassembly device is installed within the aeration tank body to simultaneously remove all clogged aeration heads, facilitating manual recycling and replacement of severely clogged aeration heads and reducing maintenance time costs.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and specifically to a continuous oily wastewater treatment device. Background Technology

[0002] In oily wastewater treatment systems, continuous oily wastewater treatment devices are key equipment for achieving compliant discharge of oily wastewater. Among these devices, the aeration process, as the core of the biological treatment process, directly impacts the overall system's treatment effectiveness. Aeration heads, as crucial components of the aeration system, are still subject to the accumulation of organic residues and microbial metabolites in actual operation, even though most modern oily wastewater treatment systems are equipped with pre-treatment oil removal units (such as oil separators and flotation devices) to remove most of the floating oil and emulsified oil before the wastewater enters the biological aeration tank. Over long-term operation, these substances tend to adhere to and clog the micropores on the aeration head surface, leading to uneven aeration and decreased oxygen transfer efficiency. Addressing aeration head clogging primarily relies on periodic manual shutdowns for inspection; however, manually inspecting and repairing each aeration head periodically results in high maintenance time costs. Summary of the Invention

[0003] (1) Technical problems to be solved

[0004] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a continuous oily wastewater treatment device to solve the above-mentioned technical problems.

[0005] (2) Technical solution

[0006] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0007] A continuous oily wastewater treatment device includes an oil removal unit, an ozone oxidation unit, a membrane bioreactor unit, and a biological aerated filter unit. These units are sequentially connected via corresponding pipelines. The biological aerated filter unit includes an aeration tank body. A biological packing material is detachably installed within the aeration tank body. First branch pipes are installed on both sides of the aeration tank body. Multiple second branch pipes are fixedly installed on each first branch pipe. Each second branch pipe is equipped with an aeration head and a detection device for identifying whether the aeration head is clogged. An auxiliary dismantling device is installed within the aeration tank body to simultaneously remove all clogged aeration heads. The detection device includes a transmission component and an execution component.

[0008] The transmission assembly includes a first working housing connected to one side of the second branch pipe. A second working housing is fixedly disposed on one side of the first working housing and communicates with its interior. A piston block that can reciprocate in a sealable manner is disposed inside the second working housing. A push rod is fixedly disposed on the piston block. The lower end of the push rod reciprocates through the second working housing. A first spring is fixedly disposed between the piston block and the inner side of the second working housing.

[0009] The actuating component includes a mounting plate that can reciprocate below the push rod. A first abutment plate for cooperating with the push rod is fixedly provided on one side of the mounting plate. An installation tube is fixedly provided on the mounting plate. The lower end of the installation tube is connected to the lower end of the second branch tube through a corrugated pipe. A connecting pipe is fixedly provided at the lower end of the aeration head. The outer peripheral wall of the connecting pipe is threadedly connected to the inner peripheral wall of the installation tube.

[0010] The auxiliary disassembly device includes auxiliary disassembly components respectively disposed on both sides of the aeration tank body; the auxiliary disassembly components include a first waterproof electric track fixedly disposed on the bottom wall of the aeration tank body, a second waterproof electric track fixedly disposed on the moving end of the first waterproof electric track, a moving plate fixedly disposed on the moving end of the second waterproof electric track, a plurality of grooves evenly distributed along the length of the moving plate, a reciprocating block disposed in the groove, a friction plate fixedly disposed on one side of the block, a second abutment plate for cooperating with the block fixedly disposed on one side of the mounting plate, a second spring fixedly disposed between the block and the groove, and a friction ring cooperating with the friction plate fixedly disposed at the lower end of the aeration head.

[0011] Two limiting tubes are fixedly installed on the lower side wall of the second branch pipe. Each limiting tube contains a reciprocating limiting post. The limiting post is fixedly connected to the mounting plate. A third spring is fixedly installed between the limiting post and the lower side wall of the second branch pipe.

[0012] A pressure ring is fixedly provided on the outer peripheral wall of the connecting pipe, and a sealing ring is sleeved on the outer peripheral wall of the connecting pipe. When the connecting pipe is threadedly connected to the installation pipe, the sealing ring is limited by the pressure ring at the connection between the connecting pipe and the installation pipe to seal.

[0013] A shut-off valve for preventing gas diversion is fixedly installed inside the second branch pipe, and the height of the shut-off valve is higher than the height of the piston block.

[0014] The oil removal unit consists of an oil removal tank, a booster pump, an oil level sensor, an oil content meter, a flow meter, and a water collection tank.

[0015] Beneficial effects:

[0016] By combining the detection device and the auxiliary disassembly device, severely blocked aeration heads can be quickly identified, eliminating the need for manual inspection of each aeration head. Furthermore, severely blocked aeration heads can be loosened simultaneously, facilitating manual recycling and replacement of these heads. This improves equipment maintenance efficiency and reduces repair time costs. Attached Figure Description

[0017] Figure 1 This is a flowchart of the continuous oily wastewater treatment device of the present invention;

[0018] Figure 2 A three-dimensional structural diagram of a biological aeration filter treatment unit;

[0019] Figure 3 This is a top view of the biological aeration filter treatment unit;

[0020] Figure 4 for Figure 3 A cross-sectional three-dimensional structural diagram at point AA;

[0021] Figure 5 for Figure 4 Enlarged view at point X in the image;

[0022] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure at point ZZ;

[0023] Figure 7 for Figure 6 Enlarged view of point B in the image;

[0024] Figure 8 for Figure 6 Enlarged view of point C in the image;

[0025] Figure 9 for Figure 8 Enlarged view of point D in the image;

[0026] Figure 10 for Figure 3 A schematic diagram of the cross-sectional structure at point AA. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-10 The present invention is further illustrated by the embodiments:

[0028] A continuous oily wastewater treatment device includes an oil removal unit, an ozone oxidation unit, a membrane bioreactor unit, and a biological aerated filter unit. These units are sequentially connected via corresponding pipelines. The biological aerated filter unit includes an aeration tank body 50, within which a biological packing material 51 is detachably installed. First branch pipes 52 are respectively installed on both sides of the aeration tank body 50. Multiple second branch pipes 53 are fixedly installed on each first branch pipe 52. Each second branch pipe 53 is equipped with an aeration head 54 and a detection device for identifying whether the aeration head is clogged. An auxiliary disassembly device is provided inside the aeration tank body 50 to simultaneously remove all blocked aeration heads; the detection device includes a transmission component and an execution component; an outlet 200 is provided on one side wall of the aeration tank body 50, the outlet 200 is located above the biological packing material 51, and an outlet pipe 201 is connected to the outlet 200; an inlet 202 is provided at the bottom of the aeration tank body 50, and an inlet pipe 203 is connected to the inlet 202; a second branch pipe 53 is fixedly installed on the side wall of the aeration tank body 50; both the first branch pipe 52 and the second branch pipe 53 are steel pipes, and the two first branch pipes 52 are connected to the same blower in the outside through a connecting hose 204.

[0029] The transmission assembly includes a first working housing 55 connected to one side of the second branch pipe 53. A second working housing 56, which is connected to the interior of the first working housing 55, is fixedly disposed on one side of the first working housing 55. A piston block 57, which can be reciprocated in a sealable manner, is disposed inside the second working housing 56. A push rod 58 is fixedly disposed on the piston block 57. The lower end of the push rod 58 reciprocates through the second working housing 56. A first spring 158 is fixedly disposed between the piston block 57 and the inner side of the second working housing 56.

[0030] The actuating component includes a mounting plate 59 that can reciprocate below the push rod 58. A first abutment 60 for cooperating with the push rod 58 is fixedly provided on one side of the mounting plate 59. A mounting tube 61 is fixedly provided on the mounting plate 59. The mounting tube 61 is connected to the lower end of the second branch pipe 53 through a corrugated pipe 62. A connecting pipe 64 is fixedly provided at the lower end of the aeration head 54. The outer peripheral wall of the connecting pipe 64 is threadedly connected to the inner peripheral wall of the mounting tube 61.

[0031] The auxiliary disassembly device includes auxiliary disassembly components respectively disposed on both sides of the aeration tank body 50; the auxiliary disassembly components include a first waterproof electric track 70 fixedly disposed on the bottom wall of the aeration tank body 50, a second waterproof electric track 71 fixedly disposed on the moving end of the first waterproof electric track 70, a moving plate 72 fixedly disposed on the moving end of the second waterproof electric track 71, a plurality of grooves 73 evenly distributed along the length direction of the moving plate 72, a reciprocating abutment 74 disposed in the groove 73, a friction plate 75 fixedly disposed on one side of the abutment 74, a second abutment plate 76 for cooperating with the abutment 74 fixedly disposed on one side of the mounting plate 59, a second spring 77 fixedly disposed between the abutment 74 and the groove 73, and a friction ring 175 cooperating with the friction plate 75 fixedly disposed at the lower end of the aeration head 54; the friction ring is made of stainless steel with knurled outer wall, and the friction plate 75 is made of polyurethane with raised dots, thereby improving the friction between the friction ring and the friction plate, thus making it easier to fully loosen the aeration head.

[0032] Two limiting tubes 90 are fixedly installed on the lower side wall of the second branch pipe 53. Each limiting tube 90 is provided with a reciprocating limiting post 91. The limiting post 91 is fixedly connected to the mounting plate 59. A third spring 92 is fixedly installed between the limiting post 91 and the lower side wall of the second branch pipe 53.

[0033] A pressure ring 900 is fixedly provided on the outer peripheral wall of the connecting pipe 64, and a sealing ring 910 is sleeved on the outer peripheral wall of the connecting pipe 64. When the connecting pipe 64 is threadedly connected to the mounting pipe 61, the sealing ring 910 is limited by the pressure ring 900 at the connection between the connecting pipe 64 and the mounting pipe 61 to seal.

[0034] A shut-off valve 150 is fixedly installed inside the second branch pipe 53 to prevent gas diversion. The height of the shut-off valve 150 is higher than the height of the piston block 57. By setting the shut-off valve, when an aerator head is blocked, the air pressure in the second branch pipe 53 connected to it increases without transmitting the air pressure to other second branch pipes connected to other aerator heads. This ensures that the air pressure only pushes the piston block above the blocked aerator head downward.

[0035] The oil removal unit consists of an oil removal tank 1, a booster pump 6, an oil level sensor 7, an oil content meter, a flow meter 5, and a water collection tank.

[0036] The core of the oil removal system is the interception oil removal tank 1, which is equipped with an oil level sensor 7 and an oil drain port 22 on the top. The upper part is equipped with a water inlet connected to a booster pump 6 and a metal tube float flow meter 5, and the lower part is equipped with a water outlet. The oil content meter is installed at the water outlet. The tank is equipped with a tubular interception oil removal membrane assembly. The separated oil phase is discharged through the oil drain port 22, and the produced water is pumped into the ozone unit.

[0037] The ozone oxidation treatment system 2 includes an ozone generator, a reaction chamber, and a polytetrafluoroethylene hollow fiber membrane module. It uses air as raw material to generate high-concentration ozone through high-frequency high-voltage discharge. The hollow fiber membrane achieves gas-liquid two-phase isolation. Ozone flows through the gas phase side, while oily wastewater flows through the liquid phase side. The reaction time is about 30 minutes.

[0038] The wastewater after oil removal and ozone treatment enters the membrane bioreactor system 3, which consists of an anoxic tank 8, an aerobic tank 9, and an MBR membrane tank 10 connected in series. The anoxic tank 8 has a built-in stirring device 12, and the effluent is pumped into the aerobic tank 9 through pipelines. The bottom of the aerobic tank 9 is equipped with aeration equipment 13 to maintain dissolved oxygen at 2~4 mg / L. The MBR membrane tank 10 uses polytetrafluoroethylene flat sheet membrane modules 14, and the permeate is transported to the biological aeration filter treatment unit 4 through pipelines.

[0039] During operation, check the circuit connections of each unit (booster pump, ozone generator, aeration device) and confirm that the signal transmission of the oil level sensor, oil content meter, and flow meter is normal. Ship oily wastewater enters the raw water collection tank through the collection pipe. The booster pump starts, and the flow rate is controlled to the set value by the metal tube float flow meter. The wastewater is then pumped into the interception and oil removal tank. The wastewater enters from the upper inlet of the interception and oil removal tank and flows through the tubular interception and oil removal membrane module. Suspended oil and large-particle emulsified oil are intercepted. The separated water flows into the intermediate collection tank from the bottom outlet for temporary storage. Ozone diffuses from the gas phase side to the liquid phase side through the polytetrafluoroethylene hollow fiber membrane module, contacting the oil-removed wastewater in the reaction tank (hydraulic retention time 20-30 minutes). This oxidizes and decomposes residual emulsified oil and organic matter. Unreacted ozone is discharged through the exhaust pipe at the top of the reaction tank and converted into oxygen by the catalytic decomposition device before being released. After ozone treatment, the wastewater enters the anoxic tank through pipelines. A low-speed submersible mixer is installed in the tank to keep the sludge suspended and the dissolved oxygen is controlled at 0.2-0.5 mg / L for denitrification. The effluent from the anoxic tank flows by gravity to the aerobic tank. Air is introduced into the bottom microporous aeration discs at an air-to-water ratio of 15:1 to maintain DO=2-4 mg / L. COD and ammonia nitrogen are degraded by aerobic bacteria. The mixed liquor from the aerobic tank enters the MBR membrane tank. Under aeration and flushing, the clear water passes through the filter membrane and enters the effluent collection tank. The sludge is intercepted and returned to the anoxic tank (return ratio 200%). The MBR effluent is boosted by a pump and enters the biological aeration filter through inlet pipe 202. The biological packing further degrades trace organic matter.

[0040] The working principle of the biological aeration filter treatment unit includes the following process: When it is necessary to perform regular maintenance and inspection of the aeration heads for damage, firstly, the biological packing material 51 is removed, then the water in the aeration tank body 50 is removed, and then the blower is started. The blower will introduce air into the first branch pipe 52 and the second branch pipe 53. The blown air then passes through the shut-off valve 150, the corrugated pipe 62, the installation pipe 61, and the connecting pipe 64 until it is sprayed out from the aeration head 54. When the aeration head 54 is severely blocked, This causes an increase in air pressure in the space between the shut-off valve 150 and the aeration head 54 in the second branch pipe 53. When the air pressure reaches a preset level, it will overcome the resistance of the first spring 158 and push the piston block 57 downward. The piston block 57 will move downward along with the push rod 58, which will push the first abutment plate 60 downward. The first abutment plate 60 will move downward along with the aeration head 54, the mounting plate 59, and the second abutment plate 76. When the aeration head is severely blocked to a certain extent, the resulting air pressure will push the first abutment plate. 60. The mounting plate 59 and the second abutment plate 76 are moved downward to the preset position. Then, the first waterproof electric track 70 is activated, allowing the second waterproof electric track 71 to move the moving plate 72 towards the aeration head 54. When the second abutment plate 76 under the severely clogged aeration head is moved downward to the preset position by the push rod 58, the abutment block 74 will move above the second abutment plate 76. Through the elastic force of the second spring 77, the friction plate 75 is kept in close contact with the outer peripheral wall of the friction ring 175 (when the abutment block 74 abuts the upper end face of the second abutment plate 76, that is, when the third spring can no longer drive the abutment block 74 to push upward, the blower is turned off). Then, the second waterproof electric track 71 is activated, allowing the moving plate 72 and the friction plate 75 to move to one side along the length of the aeration tank body 50. Relying on the friction between the friction plate 75 and the friction ring 175, the connecting pipe 64 is fully loosened from the mounting pipe 61, which makes it easier for the severely clogged aeration head to be removed and replaced manually, thereby improving the work efficiency of equipment maintenance.

[0041] When the aeration head is not blocked to a certain extent, the generated air pressure will not push the second abutment plate 76 under the aeration head to the preset position. Therefore, when the second waterproof electric track 71 moves with the moving plate 72 towards the aeration head 54, the abutment block 74 will be pressed against the second abutment plate 76 and move into the groove 73. As a result, the friction plate 75 will not come into contact with the friction ring 175, and the aeration head that can still be used will not be loosened when the severely blocked aeration head is loosened. This makes the setting of the auxiliary disassembly device more reasonable.

[0042] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0045] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A continuous oily wastewater treatment device, characterized in that: The system includes an oil removal unit, an ozone oxidation treatment unit, a membrane bioreactor unit, and a biological aeration filter treatment unit, which are sequentially connected by corresponding pipelines. The biological aeration filter treatment unit includes an aeration tank body (50), within which a biological packing material (51) is detachably installed. First branch pipes (52) are respectively installed on both sides of the aeration tank body (50), and each first branch pipe (52) is fixedly equipped with multiple... The second branch pipe (53) is provided with an aeration head (54) on each second branch pipe (53), and each second branch pipe (53) is also provided with a detection device for identifying whether the aeration head is blocked. The aeration tank body (50) is provided with an auxiliary disassembly device that can remove all blocked aeration heads at the same time. The detection device includes a transmission component and an execution component. The transmission component includes a first working housing (55) connected to one side of the second branch pipe (53). One side of the first working housing (55) is fixedly provided with a component that is connected to the inside of the first working housing (55). A second working housing (56) is connected, and a piston block (57) that can be reciprocated in a sealable manner is provided inside the second working housing (56). A push rod (58) is fixedly provided on the piston block (57), and the lower end of the push rod (58) reciprocally extends out of the second working housing (56). A first spring (158) is fixedly provided between the piston block (57) and the inner side of the second working housing (56). The actuating assembly includes a mounting plate (59) that can reciprocate below the push rod (58). One side of the mounting plate (59) A first abutment plate (60) is fixedly installed for cooperating with the push rod (58). An installation pipe (61) is fixedly installed on the mounting plate (59). The lower end of the installation pipe (61) is connected to the lower end of the second branch pipe (53) through a corrugated pipe (62). A connecting pipe (64) is fixedly installed at the lower end of the aeration head (54). The outer peripheral wall of the connecting pipe (64) is threadedly connected to the inner peripheral wall of the installation pipe (61). The auxiliary disassembly device includes auxiliary disassembly components respectively installed on both sides inside the aeration tank body (50).The auxiliary disassembly assembly includes a first waterproof electric track (70) fixedly mounted on the bottom wall of the aeration tank body (50), a second waterproof electric track (71) fixedly mounted on the moving end of the first waterproof electric track (70), a moving plate (72) fixedly mounted on the moving end of the second waterproof electric track (71), a plurality of grooves (73) evenly distributed along the length direction of the moving plate (72), a reciprocating abutment (74) disposed in the groove (73), a friction plate (75) fixedly mounted on one side of the abutment (74), a second abutment plate (76) for cooperating with the abutment (74) fixedly mounted on one side of the mounting plate (59), a second spring (77) fixedly mounted between the abutment (74) and the groove (73), and a friction ring (175) cooperating with the friction plate (75) fixedly mounted on the lower end of the aeration head (54).

2. The continuous oily wastewater treatment device as described in claim 1, characterized in that: The lower end sidewall of the second branch pipe (53) is fixedly provided with two limiting pipes (90), and each limiting pipe (90) is provided with a reciprocating limiting post (91). The limiting post (91) is fixedly connected to the mounting plate (59), and a third spring (92) is fixedly provided between the limiting post (91) and the lower end sidewall of the second branch pipe (53).

3. The continuous oily wastewater treatment device as described in claim 1, characterized in that: A pressure ring (900) is fixedly provided on the outer peripheral wall of the connecting pipe (64), and a sealing ring (910) is sleeved on the outer peripheral wall of the connecting pipe (64). When the connecting pipe (64) is threadedly connected to the installation pipe (61), the sealing ring (910) is limited by the pressure ring (900) at the connection between the connecting pipe (64) and the installation pipe (61) to seal.

4. The continuous oily wastewater treatment device as described in claim 1, characterized in that: A shut-off valve (150) for preventing gas diversion is fixedly installed inside the second branch pipe (53), and the height of the shut-off valve (150) is higher than the height of the piston block (57).

5. The continuous oily wastewater treatment device as described in claim 1, characterized in that: The oil removal unit consists of an oil removal tank (1), a booster pump (6), an oil level sensor (7), an oil content meter, a flow meter (5), and a water collection tank.

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