Product oil depot oily sewage treatment device based on ultrasonic waves

Abstract

The utility model belongs to the technical field of sewage treatment, and particularly relates to an ultrasonic-based oil product depot oily sewage treatment device which is characterized by comprising an ultrasonic oil-water separation tank, a biochemical treatment tank and a pretreatment device, the ultrasonic oil-water separation tank is provided with a water inlet pipe I and a water outlet pipe I, and a floating oil collecting device is arranged at the top of the biochemical treatment tank; a central water outlet groove of the biochemical treatment tank is provided with an overflow triangular weir, a water outlet pipe II is provided with a bypass pipe, the tank bottom is provided with a filter material replacement port, and the middle part of the tank is provided with a sludge discharge pipe for discharging excessive microorganisms and metabolites thereof. The device solves the problems of difficulty in oil-water separation, low biodegradability of oily sewage, difficulty in treatment of heavy metals in product oily sewage and the like, treats the heavy metals in the oily sewage from two stages of pretreatment and later advanced treatment respectively, ensures that the growth environment of microorganisms is not influenced by the heavy metals, ensures the effluent quality, and reduces the production cost. Oil-water separation is carried out through ultrasonic waves, pollution caused by secondary dosing is avoided, and energy conservation and emission reduction are achieved fundamentally.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment, and in particular relates to an ultrasonic-based oil product depot oil-containing sewage treatment device. Background Art

[0002] Finished oil depots are centralized storage and supply centers for petroleum products. With the acceleration of my country's modernization process, the demand for finished oil is increasing, and the storage volume and variety of oil products are getting larger and larger. For this reason, my country has established a number of large strategic oil storage depots to ensure the basic needs of transportation and production and operation. With the increase in the number of oil depots, the amount of wastewater discharged during their production and operation has also increased accordingly, and the composition of oil depot wastewater has become more and more complex due to the complexity of oil types. Existing sewage treatment facilities may face greater treatment pressure. If they are not upgraded and optimized accordingly, they may not be able to effectively treat a large amount of oil depot oily wastewater, which means that the cost of treating finished oil oily wastewater needs to be increased. Otherwise, the substandard wastewater discharge will have an impact on the surrounding environment and ecosystem, increasing the potential threat of oil depot wastewater to the environment.

[0003] A large amount of oily wastewater is generated during the storage and transportation of finished oil in oil depots. The main component of oil depot wastewater is water containing petroleum hydrocarbons, which may contain pollutants such as organic solvents, grease, heavy metals, as well as some solid impurities, dissolved gases and dissolved salts.

[0004] The wastewater from finished oil depots usually needs to be treated by appropriate pretreatment and biochemical treatment methods to reduce the concentration of organic matter, change the characteristics of organic matter, and provide suitable biochemical conditions. However, since the oily wastewater from finished oil depots contains toxic and harmful substances such as heavy metals, it will have a toxic effect on microorganisms. Therefore, it is urgent to find an economical pretreatment technology that does not produce secondary pollution to solve this problem.

[0005] In general, the wastewater from oil product depots is characterized by large volume and high pollution level. The biodegradability of wastewater from oil product depots is affected by factors such as organic matter characteristics, concentration, microbial adaptability and treatment process. Through scientific evaluation and reasonable operation, the biodegradability of wastewater from oil product depots can be improved, making it easier to be degraded by microorganisms, and indirectly improving the efficiency of wastewater treatment. Summary of the invention

[0006] The utility model aims to provide an ultrasonic-based oil product depot oil-containing wastewater treatment device, which solves the problems of difficult oil-water separation, low biodegradability of oil-containing wastewater and difficult treatment of heavy metals in finished oil wastewater.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] The utility model is a device for treating oily wastewater in a finished oil depot based on ultrasonic wave, which is characterized by comprising an ultrasonic oil-water separation tank, a biochemical treatment tank, and a pretreatment device arranged between the ultrasonic oil-water separation tank and the biochemical treatment tank.

[0009] The ultrasonic oil-water separation tank comprises a water inlet pipe I arranged on one side of the tank body and a water outlet pipe I arranged on the other side, ultrasonic generators arranged on both sides of the tank body, a floating oil collecting device, a slide rail and a motor I arranged on the upper part of the tank body, an oil collecting tank arranged on the edge of the tank body, an oil discharge pipe arranged in the oil collecting tank, and a mud discharge port arranged at the bottom of the tank body.

[0010] The pretreatment device comprises a shell, a valve I connected to the water inlet of the shell through a flange, a valve II connected to the water outlet of the shell through a flange, a feed port I arranged on the side of the shell, and a feed port I, a feed port II and a feed port III arranged at the bottom of the shell.

[0011] The biochemical treatment tank includes an inlet pipe II and an outlet pipe II, an exhaust port arranged on the top of the biochemical treatment tank, a motor II and a stirring paddle arranged on the top of the biochemical treatment tank, an outlet trough arranged at the center of the biochemical treatment tank, an overflow triangular weir arranged on the top circumference of the outlet trough, a mud discharge pipe and a water quality regulating port arranged on the side of the biochemical treatment tank, valves III and IV connected to the outlet pipe II, a deep treatment unit arranged at the bottom of the biochemical treatment tank, an inlet and an outlet connected to both ends of the deep treatment unit, and a valve V connected to the inlet.

[0012] The pretreatment device is cylindrical in shape and has a pipe diameter of DN500. The filter materials of the pretreatment device are quartz sand I, hollow spherical powder material I and activated carbon from left to right. The pretreatment device is provided with a backwash pipeline. The water inlet backwash inlet pipe is arranged below the pretreatment device, and the water outlet backwash outlet pipe is arranged above the pretreatment device. The diameters of the water inlet backwash inlet pipe and the water outlet backwash outlet pipe are both DN100.

[0013] The deep treatment unit has filter materials from left to right, namely pebbles, quartz sand II, hollow spherical powder material II, quartz sand II and pebbles. Backwashing is conducted from the right side and discharged from the left side. The pipe diameters of the outlet and inlet are both DN100.

[0014] The diameter of the oil discharge pipe is DN150, the diameter of the mud discharge port is DN200, the diameter of the water inlet pipe I is DN200, and the diameter of the water outlet pipe I is DN200.

[0015] The diameter of the water inlet pipe II of the biochemical treatment tank is DN200, the diameter of the water outlet pipe II is DN200, the diameter of the water quality regulating port is DN200, and the diameter of the mud discharge pipe is DN200.

[0016] The upper diameter of the water outlet trough is DN500, and the angle between the water outlet trough and the tank wall is 45° to 60°.

[0017] The hydraulic retention time of the pretreatment device is controlled to be above 30 minutes.

[0018] The hydraulic retention time of the deep treatment unit is controlled to be above 20 minutes.

[0019] The frequency of the ultrasonic generator is 2×104-5×108 Hz.

[0020] Advantages of the utility model:

[0021] The utility model discloses an ultrasonic-based oily wastewater treatment device for a finished oil depot, which solves the problems of difficult oil-water separation, low biodegradability of oily wastewater, and difficult treatment of heavy metals in finished oil wastewater. The solution treats heavy metals in oily wastewater in two stages, namely, pretreatment and later deep treatment, to ensure that the growth environment of microorganisms is not affected by heavy metals, to ensure the effluent quality, to use ultrasonic waves to separate oil from water, to avoid pollution caused by secondary dosing, and to fundamentally achieve energy conservation and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model.

[0023] Figure 2 This is a detailed diagram of the pretreatment device of the utility model.

[0024] Figure 3 This is a detailed diagram of the depth processing unit of the utility model.

[0025] In the figure: 1-oil discharge pipe, 2-water inlet pipe Ⅰ, 3-ultrasonic generator, 4-motor Ⅰ, 5-slide rail, 6-floating oil collection device, 7-mud discharge port, 8-valve Ⅰ, 9-pretreatment device, 10-outlet backwash outlet pipe, 11-quartz sand Ⅰ, 12-hollow spherical powder material Ⅰ, 13-feed port Ⅰ, 14-activated carbon, 15-flange, 16-refueling port Ⅰ, 17-refueling port Ⅱ, 18-refueling port Ⅲ, 19-water inlet backwash inlet pipe, 20-valve Ⅱ, 2 1-water outlet, 22-motor II, 23-exhaust port, 24-stirring paddle, 25-overflow triangular weir, 26-water outlet, 27-mud discharge pipe, 28-valve III, 29-valve IV, 30-valve V, 31-deep processing unit, 32-pebbles, 33-quartz sand II, 34-hollow spherical powder material II, 35-feeding port II, 36-discharging port I, 37-discharging port II, 38-discharging port III, 39-discharging port IV, 40-discharging port V, 41-water quality adjustment port. DETAILED DESCRIPTION

[0026] The specific implementation of the present utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 , 2 As shown in Figure 3, the utility model is a device for treating oily wastewater in a finished oil depot based on ultrasonic wave, characterized in that it comprises an ultrasonic oil-water separation tank, a biochemical treatment tank, and a pretreatment device 9 arranged between the ultrasonic oil-water separation tank and the biochemical treatment tank.

[0028] The ultrasonic oil-water separation tank comprises a water inlet pipe Ⅰ2 arranged on one side of the tank body and a water outlet pipe Ⅰ on the other side, an ultrasonic generator 3 arranged on both sides of the tank body, a floating oil collecting device 6, a slide rail 5 and a motor Ⅰ4 arranged on the upper part of the tank body, an oil collecting tank arranged on the edge of the tank body, an oil discharge pipe 1 arranged in the oil collecting tank, and a mud discharge port 7 arranged at the bottom of the tank body.

[0029] The pretreatment device 9 includes a shell, a valve I8 connected to the water inlet of the shell through a flange 15, a valve II20 connected to the water outlet of the shell through a flange 15, a feed port I13 arranged on the side of the shell, and a refueling port I16, a refueling port II17 and a refueling port III18 arranged at the bottom of the shell.

[0030] The biochemical treatment tank includes an inlet pipe II and an outlet pipe II, an exhaust port 23 arranged on the top of the biochemical treatment tank, a motor II 22 and a stirring paddle 24 arranged on the top of the biochemical treatment tank, a water outlet trough 26 arranged in the center of the biochemical treatment tank, an overflow triangular weir 25 arranged on the top circumference of the water outlet trough 26, a mud discharge pipe 27 and a water quality regulating port 41 arranged on the side of the biochemical treatment tank, a valve III 28 and a valve IV 29 connected to the outlet pipe II, a deep treatment unit 31 arranged at the bottom of the biochemical treatment tank, a water inlet and a water outlet 21 connected to both ends of the deep treatment unit 31, and a valve V 30 connected to the water inlet.

[0031] The pretreatment device 9 is cylindrical in shape and has a pipe diameter of DN500. The filter materials of the pretreatment device 9 are quartz sand Ⅰ11, hollow spherical powder material Ⅰ12 and activated carbon 14 from left to right. The pretreatment device 9 is provided with a backwash pipeline. The water inlet backwash inlet pipe 19 is arranged below the pretreatment device 9, and the water outlet backwash outlet pipe 10 is arranged above the pretreatment device 9. The diameters of the water inlet backwash inlet pipe 19 and the water outlet backwash outlet pipe 10 are both DN100.

[0032] The deep treatment unit 31 has filter materials from left to right, which are pebbles 32, quartz sand II 33, hollow spherical powder material II 34, quartz sand II 33 and pebbles 32. Backwashing takes in water from the right and out from the left. The pipe diameters of the water outlet 21 and the water inlet are both DN100.

[0033] The diameter of the oil discharge pipe 1 is DN150, the diameter of the mud discharge port 7 is DN200, the diameter of the water inlet pipe Ⅰ2 is DN200, and the diameter of the water outlet pipe Ⅰ is DN200.

[0034] The diameter of the water inlet pipe II of the biochemical treatment tank is DN200, the diameter of the water outlet pipe II is DN200, the diameter of the water quality regulating port 41 is DN200, and the diameter of the mud discharge pipe 27 is DN200.

[0035] The upper diameter of the water outlet trough 26 is DN500, and the angle between the outlet trough 26 and the tank wall is 45° to 60°.

[0036] The hydraulic retention time of the pretreatment device 9 is controlled to be above 30 minutes.

[0037] The hydraulic retention time of the deep treatment unit 31 is controlled to be above 20 minutes.

[0038] Two ultrasonic generators 3 are provided in total, and the frequency is selected to be 2×104-5×108 Hz.

[0039] Example: See Figure 1-Figure 3A device for treating oily wastewater in a finished oil depot based on ultrasonic wave comprises: an ultrasonic oil-water separation tank, a biochemical treatment tank and a pretreatment device in the middle. A water inlet pipe Ⅰ2 is arranged on the left side of the ultrasonic oil-water separation tank, and the oily wastewater enters the ultrasonic oil-water separation tank. Ultrasonic generators 3 are distributed on both sides of the tank wall. A floating oil collecting device 6 and its slide rail 5 and a motor Ⅰ4 are installed on the upper part of the tank. The separated oil phase is transported to the oil collecting tank at the edge of the tank body. An oil discharge pipe 1 is arranged in the oil collecting tank, and a mud discharge port 7 is arranged at the bottom of the tank. A pretreatment device 9 is arranged between the ultrasonic oil-water separation tank and the biochemical treatment tank. The water inlet of the shell of the pretreatment device is controlled by a valve Ⅰ8, and the water outlet of the shell is controlled by a valve Ⅱ20 The left and right ends of the device are connected to the valve by flanges 15, a feed port Ⅰ13 is set on the side, and a refueling port Ⅰ16, a refueling port Ⅱ17, and a refueling port Ⅲ18 are set at the bottom; the right side is a biochemical treatment tank, which adopts the side water inlet and middle water outlet method, an exhaust port 23 is set on the top of the tank, and the stirring paddle 24 is driven by a motor Ⅱ22 to complete the average process of microorganisms and sewage. A water outlet trough 26 is set in the center of the tank, and an overflow triangular weir 25 is set on the top circumference of the water outlet trough 26. The biochemical treatment tank is also provided with a mud discharge pipe 27 and a water quality regulating port 41. A water outlet pipe Ⅱ is set on the right side of the tank, which is controlled by a valve Ⅲ 28. A deep processing unit 31 is set at the bottom of the tank, and its water inlet is controlled by a valve Ⅴ30.

[0040] Specifically, the oily wastewater is introduced into the ultrasonic oil-water separation tank through the water inlet pipe Ⅰ2, and the ultrasonic wave can break the long-chain organic matter into short-chain organic matter that is easily utilized by microorganisms, thereby improving the biodegradability of the wastewater; after ultrasonic treatment, the oil and water are separated, and the oil phase is on the top, which is collected by a floating oil collecting device and sent to an oil collecting tank, and then discharged through an oil discharge pipe 1; the mud phase is located at the bottom of the tank, and is discharged through a mud discharge port 7 at the bottom of the tank after reaching a certain height; the water phase is in the middle of the tank body, and the switch is controlled by valve Ⅰ8. The water phase enters the pretreatment device 9 through valve Ⅰ8, and is first coarsely filtered with quartz sand, and then the hollow spherical powder material and activated carbon are used to deeply adsorb heavy metals, so as to intercept toxic and harmful substances in the wastewater and prevent them from flowing into the biochemical treatment tank and affecting the growth of microorganisms. The pre-treated sewage is controlled by valve II 20 to enter the biochemical treatment tank, in which the overall pollutant degradation treatment of the finished oil-containing sewage is completed. Since the biodegradability of the finished oil sewage is low, the domestic sewage in the factory area can be transported to the biochemical treatment tank through the water quality regulating port 41 to improve the biodegradability of the finished oil sewage. The oily sewage treated by microorganisms is filtered through the overflow triangular weir 25 and enters the water outlet trough 26 in the tank. After the water quality index is tested to be qualified, the effluent is controlled to flow out through valves III 28 and valves IV 29. If the test is unqualified, valves III 28 and valves V 30 are opened, and valves IV 29 are closed. Then the sewage enters the deep treatment unit 31 for the next step of treatment. The deep treatment unit 31 is composed of 5 layers of filter materials such as pebbles, quartz sand and hollow spherical powder materials, and is discharged through the water outlet 21 after treatment; the corresponding excretion waste of the microorganisms settles to the bottom, and the excess sludge can be discharged from the sludge discharge pipe 27.

[0041] Furthermore, the hydraulic retention time of the pretreatment device 9 and the deep treatment unit 31 are 30 minutes and 20 minutes respectively, in order to complete the adsorption of pollutants. The lateral arrangement of the filter material layer is conducive to reducing the water flow velocity and increasing the hydraulic retention time.

[0042] Furthermore, both the pre-treatment device 9 and the deep treatment unit 31 are provided with backwashing pipes, and the pre-treatment device 9 is provided with a backwashing pipe alone. The deep treatment unit 31 uses the outlet pipe to complete backwashing, closes the valve III 28, opens the valve IV 29 and the valve V 30, and enters the water outlet 21 to backwash the filter material of the deep treatment unit 31; backwashing is performed once in the morning and evening every day to ensure that the filter material layer is not blocked, improve the adsorption efficiency, and ensure the outlet water quality.

[0043] The utility model discloses an ultrasonic-based oily wastewater treatment device for a finished oil depot, which solves the problems of difficult oil-water separation, low biodegradability of oily wastewater, and difficult treatment of heavy metals in finished oil wastewater. The solution treats heavy metals in oily wastewater in two stages, namely, pretreatment and later deep treatment, to ensure that the growth environment of microorganisms is not affected by heavy metals, to ensure the effluent quality, to use ultrasonic waves to separate oil from water, to avoid pollution caused by secondary dosing, and to fundamentally achieve energy conservation and emission reduction.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultrasonic-based oil-containing wastewater treatment device for finished oil depots, characterized in that: It comprises an ultrasonic oil-water separation tank, a biochemical treatment tank, and a pretreatment device (9) arranged between the ultrasonic oil-water separation tank and the biochemical treatment tank. The ultrasonic oil-water separation tank comprises a water inlet pipe I (2) arranged on one side of the tank body and a water outlet pipe I on the other side, ultrasonic generators (3) arranged on both sides of the tank body, a floating oil collecting device (6), a slide rail (5) and a motor I (4) arranged on the upper part of the tank body, an oil collecting tank arranged on the edge of the tank body, an oil discharge pipe (1) arranged in the oil collecting tank, and a mud discharge port (7) arranged at the bottom of the tank body. The pretreatment device (9) comprises a shell, a valve I (8) connected to the water inlet of the shell through a flange (15), a valve II (20) connected to the water outlet of the shell through a flange (15), a feed port I (13) arranged on the side of the shell, a material change port I (16), a material change port II (17) and a material change port III (18) arranged at the bottom of the shell, The biochemical treatment tank comprises a water inlet pipe II and a water outlet pipe II, an exhaust port (23) arranged on the top of the biochemical treatment tank, a motor II (22) and a stirring paddle (24) arranged on the top of the biochemical treatment tank, a water outlet trough (26) arranged at the center of the biochemical treatment tank, an overflow triangular weir (25) arranged on the top circumference of the water outlet trough (26), a mud discharge pipe (27) and a water quality regulating port (41) arranged on the side of the biochemical treatment tank, a valve III (28) and a valve IV (29) connected to the water outlet pipe II, a deep treatment unit (31) arranged at the bottom of the biochemical treatment tank, a water inlet and a water outlet (21) connected to both ends of the deep treatment unit (31), and a valve V (30) connected to the water inlet.

2. The ultrasonic-based oily wastewater treatment device for finished oil depots according to claim 1 is characterized in that: The pretreatment device (9) is cylindrical in shape and has a pipe diameter of DN500. The filter materials of the pretreatment device (9) are quartz sand I (11), hollow spherical powder material I (12) and activated carbon (14) from left to right. The pretreatment device (9) is provided with a backwash pipeline. The water inlet backwash inlet pipe (19) is arranged below the pretreatment device (9), and the water outlet backwash outlet pipe (10) is arranged above the pretreatment device (9). The diameters of the water inlet backwash inlet pipe (19) and the water outlet backwash outlet pipe (10) are both DN100.

3. The ultrasonic-based oily wastewater treatment device for finished oil depots according to claim 1 is characterized in that: The deep treatment unit (31) has filter materials from left to right, which are pebbles (32), quartz sand II (33), hollow spherical powder material II (34), quartz sand II (33) and pebbles (32). Backwashing takes in water from the right side and out water from the left side. The pipe diameters of the water outlet (21) and the water inlet are both DN100.

4. The ultrasonic-based oily wastewater treatment device for finished oil depots according to claim 1 is characterized in that: The oil discharge pipe (1) has a diameter of DN150, the mud discharge port (7) has a diameter of DN200, the water inlet pipe I (2) has a diameter of DN200, and the water outlet pipe I has a diameter of DN200.

5. The ultrasonic-based oily wastewater treatment device for finished oil depots according to claim 1 is characterized in that: The diameter of the water inlet pipe II of the biochemical treatment tank is DN200, the diameter of the water outlet pipe II is DN200, the diameter of the water quality regulating port (41) is DN200, and the diameter of the mud discharge pipe (27) is DN200.

6. The ultrasonic-based oily wastewater treatment device for finished oil depots according to claim 1 is characterized in that: The upper diameter of the water outlet trough (26) is DN500, and the angle between the water outlet trough (26) and the tank wall is 45° to 60°.

7. The ultrasonic-based oily wastewater treatment device for finished oil depots according to claim 2 is characterized in that: The hydraulic retention time of the pretreatment device (9) is controlled to be above 30 minutes.

8. The ultrasonic-based oily wastewater treatment device for finished oil depots according to claim 3 is characterized in that: The hydraulic retention time of the deep treatment unit (31) is controlled to be more than 20 minutes.

9. The ultrasonic-based oil-containing wastewater treatment device for finished oil depots according to claim 1 is characterized in that: The frequency of the ultrasonic generator (3) is 2×104-5×108 Hz.

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