Oil removal device for treating oily wastewater in oil depot

Abstract

The utility model relates to the technical field of oil-containing wastewater treatment, and discloses an oil removal device for oil depot oil-containing wastewater treatment, which comprises a shell, a treatment cylinder arranged in the shell, a stirring component arranged in the shell, and a delivery pump arranged on the outer side of the shell, the input end of the conveying pump is fixedly connected with a floating type oil suction head through a connecting hose, the output end of the conveying pump is communicated with the bottom of the treatment barrel through a connecting hose, a filter screen is fixedly connected into the shell, a drainage pipe is installed at the bottom of the shell, and a chemical adding assembly is installed at the top of the shell. An aeration assembly is mounted on the outer side of the shell. According to the oil removal device, a sucked oil-water mixture is subjected to chemical adding treatment in the treatment barrel and is filtered after being stirred, so that the oil removal operation on the wastewater is completed, and chemicals are added in a dropwise adding manner so as to adapt to the continuous oil removal operation on the wastewater.

Description

Technical Field

[0001] The utility model relates to the technical field of oily wastewater treatment, in particular to an oil removal device for treating oily wastewater in an oil depot. Background Art

[0002] With the rapid development of industry and the ever-increasing demand for energy, oil depots inevitably generate large amounts of oily wastewater during the storage and transportation of oil products. This oily wastewater comes from a variety of sources, including tank cleaning water, oil leaks, and rainwater runoff. If discharged without effective treatment, this oily wastewater will cause extremely serious pollution to the soil, water bodies, and the ecological environment. On the one hand, oil substances form an oil film on the surface of water bodies, hindering the exchange of oxygen between the water and the air, causing the death of aquatic organisms due to lack of oxygen. On the other hand, oil substances also seep into the soil, affecting soil permeability and fertility, and disrupting the ecological balance.

[0003] Currently, most existing oil removal devices for treating oily wastewater from oil depots employ simple physical separation methods, primarily targeting floating oil. These devices typically exploit the density difference between oil and water to naturally cause the floating oil to rise and be recovered through specialized collection structures. However, existing oil removal devices are less effective for treating waste oil in the middle and bottom layers of the oily wastewater. This is because the waste oil in these layers often exists in the form of emulsified or dissolved oil, making it difficult to separate from the water. Furthermore, existing oil removal devices often fail to effectively separate the waste oil in these layers during the treatment process, resulting in a certain amount of oil remaining in the treated wastewater, making it difficult to meet stringent environmental protection requirements. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an oil removal device for treating oily wastewater in oil depots, aiming to improve the problems that existing oil removal devices for treating oily wastewater in oil depots can usually only treat floating oil, have weak treatment effects on middle and bottom waste oil, and lack adaptability to oily wastewater of different types and concentrations.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An oil removal device for treating oily wastewater from an oil depot comprises a housing, a treatment barrel mounted inside the housing, a stirring assembly mounted inside the housing, a delivery pump mounted outside the housing, an input end of the delivery pump fixedly connected to a floating oil suction head via a connecting hose, an output end of the delivery pump connected to the bottom of the treatment barrel via a connecting hose, a filter fixedly connected inside the housing, a drain pipe mounted at the bottom of the housing, a dosing assembly mounted on the top of the housing, and an aeration assembly mounted outside the housing;

[0007] As a further description of the above technical solution:

[0008] The stirring assembly includes a motor, which is installed inside the housing. The output end of the motor passes through the bottom of the treatment cylinder and is fixedly connected to a stirring plate.

[0009] As a further description of the above technical solution:

[0010] The outer edge of the bottom of the treatment cylinder is in an arc shape, which is used to guide the waste oil inward;

[0011] As a further description of the above technical solution:

[0012] The dosing assembly includes a storage tank, which is installed on the top extension of the shell. The output end at the bottom of the storage tank is fixedly connected to a feed pipe, a regulating valve is installed on the top of the feed pipe, and a plurality of through holes are opened at the bottom of the feed pipe;

[0013] As a further description of the above technical solution:

[0014] The aeration assembly includes a blower installed outside the shell, the output end of the blower is fixedly connected to an air inlet pipe, and the other end of the air inlet pipe is fixedly connected to an aeration pipe network;

[0015] As a further description of the above technical solution:

[0016] A cavity is defined in the middle of the housing, and the treatment cylinder is mounted inside the cavity via a bracket.

[0017] As a further description of the above technical solution:

[0018] A material collecting trough is fixedly connected to the interior of the shell, and the material collecting trough is installed on the outside of the filter screen. A discharge hopper is installed on one side of the material collecting trough, and the end of the discharge hopper extends to the outside of the shell;

[0019] As a further description of the above technical solution:

[0020] The output end of the motor is also provided with a scraper, which contacts the inner wall of the filter screen;

[0021] As a further description of the above technical solution:

[0022] A bracket is fixedly connected to the outer side of the shell, a collecting box is placed on the upper part of the bracket, and the opening end of the discharge hopper is located on the upper part of the collecting box.

[0023] The utility model has the following beneficial effects:

[0024] 1. In the present invention, the inhaled oil-water mixture is treated with a drug inside the treatment cylinder, stirred, and then filtered, thereby completing the oil removal operation of the wastewater. The drug is added in a dropwise manner to adapt to the continuous oil removal operation of the wastewater;

[0025] 2. In the present invention, an aeration pipe network is installed in the waste oil pool for aeration treatment, so as to push the middle and bottom oil layers in the waste oil pool upward, and cooperate with the floating oil suction head to collect and process the oil, thereby improving the oil removal effect of wastewater in different areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the installation position of an oil removal device for treating oily wastewater in an oil depot proposed by the present invention;

[0027] Figure 2 This is a three-dimensional schematic diagram of an oil removal device for treating oily wastewater in an oil depot proposed by the present invention;

[0028] Figure 3 This is a schematic cross-sectional view of the shell of an oil removal device for treating oily wastewater in an oil depot proposed by the present invention;

[0029] Figure 4 This is a structural schematic diagram of a stirring assembly of an oil removal device for treating oily wastewater in an oil depot proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the location of a collection box of an oil removal device for treating oily wastewater in an oil depot proposed by the present invention;

[0031] Figure 6 The utility model is a cross-sectional schematic diagram of a discharge pipe of an oil removal device for treating oily wastewater in an oil depot.

[0032] Legend:

[0033] 1. Shell; 2. Delivery pump; 3. Connecting hose; 4. Floating oil suction head; 5. Treatment barrel; 6. Motor; 7. Stirring plate; 8. Filter screen; 9. Scraper; 10. Collection trough; 11. Storage tank; 12. Regulating valve; 13. Discharge hopper; 14. Blower; 15. Inlet pipe; 16. Aeration pipe network; 17. Drain pipe; 18. Cavity; 19. Bracket; 20. Collection box; 21. Discharge pipe; 22. Through hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Reference Figure 1-Figure 3 The utility model provides an embodiment of an oil removal device for treating oily wastewater in an oil depot, comprising a shell 1, a treatment barrel 5 installed inside the shell 1, and the oily wastewater drawn from the waste oil pool is pre-treated inside the treatment barrel 5. A cavity 18 is opened in the middle of the shell 1, and the treatment barrel 5 is installed inside the cavity 18 through a bracket. There is a gap between the treatment barrel 5 and the inner wall of the shell 1, and the pre-treated wastewater flows downward through the gap. A delivery pump 2 is installed on the outside of the shell 1, and the input end of the delivery pump 2 is fixedly connected to a floating oil suction head 4 through a connecting hose 3. The output end of the delivery pump 2 is connected to the bottom of the treatment barrel 5 through the connecting hose 3. After the floating oil suction head 4 is placed inside the waste oil pool, the floating oil suction head 4 floats on the liquid surface, and the liquid inlet of the connecting hose 3 is located below the liquid surface. Then, the delivery pump 2 is driven to work, and the floating oil in the waste liquid pool can be transported to the inside of the treatment barrel 5.

[0036] Reference Figure 3 and Figure 6The outer edge of the bottom of the treatment barrel 5 is in an arc shape, which is used to guide the waste oil inward. The oily wastewater overflowing from the gap along the edge of the treatment barrel 5 is guided by the arc at the bottom of the treatment barrel 5 and then gathers in the center and falls downward. A dosing component is installed on the top of the shell 1. The dosing component includes a storage tank 11. The storage tank 11 is installed on the top extension of the shell 1. The reagents required during the oil removal operation are filled inside the storage tank 11. It can be but not limited to flocculants. The number of storage tanks 11 is not limited to one. A discharge pipe 21 is fixedly connected to the output end at the bottom of the storage tank 11. A regulating valve 12 is installed on the top of the discharge pipe 21. A plurality of through holes 22 are opened at the bottom of the 21. The discharge speed of the reagent is adjusted by the regulating valve 12 to meet different oil removal needs. After the flocculant falling from the discharge pipe 21 enters the inside of the treatment barrel 5, it mixes with the waste oil inside the treatment barrel 5 and spreads upward when the waste oil continues to enter. A stirring assembly is installed inside the shell 1, and the stirring assembly includes a motor 6. The motor 6 is installed inside the shell 1. The output end of the motor 6 passes through the bottom of the treatment barrel 5 and is fixedly connected to a stirring plate 7. After the added agent is transported to the inside of the treatment barrel 5 by the discharge pipe, the driving motor 6 works to drive the stirring plate 7 to rotate. The waste oil driven by the rotation of the stirring plate 7 enters from the through hole 22 and mixes with the falling flocculant, thereby completing the pretreatment of the oily wastewater. After the waste oil and the flocculant are mixed, the mixed liquid will slowly move upward inside the treatment barrel 5. During the upward movement, the impurities in the waste oil are slowly adsorbed under the action of the flocculant. When the waste oil overflows from the top of the treatment barrel 5, the flocculation operation is ensured to be completed.

[0037] Reference Figure 2-Figure 4 A filter screen 8 is fixedly connected to the inside of the shell 1. The mixed and treated oily wastewater falls along the edge of the treatment cylinder 5 into the inside of the filter screen 8, and then after being filtered by the filter screen 8, falls downward to the bottom of the shell 1. A drain pipe 17 is installed at the bottom of the shell 1. The wastewater after filtration and separation flows back into the waste oil pool from the drain pipe 17. An aeration assembly is installed on the outside of the shell 1. The aeration assembly includes a blower 14 installed on the outside of the shell 1. The output end of the blower 14 is fixedly connected to the air inlet pipe 15. The other end of the air inlet pipe 15 is fixedly connected to the aeration pipe network 16. When it is necessary to remove the waste oil in the middle and bottom of the waste oil pool, the blower 14 is driven to work to draw in external air, and then transport it from the air inlet pipe 15 to the aeration pipe network 16, causing the aeration pipe network 16 to work at the bottom of the waste oil pool, thereby pushing the emulsified oil and other oil bodies located in the middle and bottom of the waste oil pool upward so that the floating oil suction head 4 can extract them;

[0038] Reference Figure 3-Figure 5The output end of the motor 6 is also equipped with a scraper 9, which contacts the inner wall of the filter 8. When the motor 6 drives the stirring plate 7 to rotate to stir and mix, it also drives the scraper 9 to rotate. At this time, the waste oil filtered by the filter 8 is accumulated on the upper surface of the filter 8. Under the rotation of the scraper 9, the waste oil can be cleaned and overflowed along the edge of the filter 8. A collection trough 10 is fixedly connected to the inside of the shell 1. The collection trough 10 is installed on the outside of the filter 8. The waste oil overflowing from the edge of the filter 8 enters the collection trough 10 for collection. A discharge hopper 13 is installed on one side of the collection trough 10. The collection trough 10 is tilted toward the discharge hopper 13 as a whole. The end of the discharge hopper 13 extends to the outside of the shell 1. The waste oil entering the collection trough 10 flows toward the discharge hopper 13 under the action of the tilt angle of the collection trough 10 and is discharged from the discharge hopper 13. A bracket 19 is fixedly connected to the outside of the shell 1 , a collecting box 20 is placed on the upper part of the bracket 19 , and the open end of the discharge hopper 13 is located on the upper part of the collecting box 20 . The waste oil discharged from the discharge hopper 13 can be collected by the collecting box 20 .

[0039] Working principle: When treating the waste oil pool of the oil depot, first sink the aeration pipe network 16 to the bottom of the waste oil pool, then place the floating oil suction head 4 inside the waste oil pool, and use the float to make the floating oil suction head 4 float on the surface of the waste oil. Then start the delivery pump 2 to work, and use the connecting hose 3 to draw the floating oil in the waste oil pool from the floating oil suction head 4, and then deliver it to the inside of the treatment cylinder 5. At this time, open the regulating valve 12, and the flocculant flows into the inside of the discharge pipe 21 and contacts the waste oil through the through hole 22, so that the flocculant in the storage tank 11 enters the inside of the treatment cylinder 5 in a dropwise manner. , and then drive the motor 6 to work and drive the stirring plate 7 to rotate, mixing the waste oil and flocculant entering the treatment cylinder 5 to improve the coagulation effect of the waste oil. Then, due to the continuous and slow input of the waste oil, the internal space of the treatment cylinder 5 is finally filled. At this time, the excess waste oil overflows along the notch of the outer edge of the treatment cylinder 5, flows downward along the outer wall of the treatment cylinder 5, and then drips onto the surface of the filter screen 8. The oil in the waste oil is blocked by the filter screen 8 and accumulates on the upper surface of the filter screen 8. The water is filtered by the filter screen 8 and falls to the bottom of the shell 1, and is then discharged into the waste oil pool again through the drain pipe 17.

[0040] When degreasing the waste oil located in the middle and bottom of the waste oil pool, the blower 14 is driven to draw in external air, which is then transported from the air inlet pipe 15 to the aeration network 16, causing the aeration network 16 to work at the bottom of the waste oil pool. This pushes the emulsified oil and other oil bodies located in the middle and bottom of the waste oil pool upward, causing them to reach the surface of the waste liquid in the waste oil pool, and then are collected by the floating oil suction head 4 and enter the treatment cylinder 5 for mixing. At this time, the reagent stored in the storage tank 11 is a polyaluminum chloride solution or cationic polyacrylamide, or multiple storage tanks 11 are installed on the top of the shell 1 to add multiple reagents, thereby emulsifying and flocculating the waste oil and improving the degreasing operation of the oily wastewater.

[0041] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An oil removal device for treating oily wastewater in an oil depot, comprising a housing (1), characterized in that: A treatment cylinder (5) is installed inside the shell (1), a stirring assembly is installed inside the shell (1), a delivery pump (2) is installed outside the shell (1), the input end of the delivery pump (2) is fixedly connected to a floating oil suction head (4) through a connecting hose (3), the output end of the delivery pump (2) is connected to the bottom of the treatment cylinder (5) through a connecting hose (3), a filter screen (8) is fixedly connected inside the shell (1), a drain pipe (17) is installed at the bottom of the shell (1), a dosing assembly is installed on the top of the shell (1), and an aeration assembly is installed outside the shell (1).

2. The oil removal device for treating oily wastewater in an oil depot according to claim 1, characterized in that: The stirring assembly comprises a motor (6), which is installed inside the housing (1). The output end of the motor (6) passes through the bottom of the treatment cylinder (5) and is fixedly connected to a stirring plate (7).

3. The oil removal device for treating oily wastewater in an oil depot according to claim 1, characterized in that: The outer edge of the bottom of the treatment cylinder (5) is in an arc shape, and is used to guide the waste oil inward.

4. The oil removal device for treating oily wastewater in an oil depot according to claim 1, characterized in that: The dosing assembly comprises a storage tank (11), the storage tank (11) being mounted on the top extension of the shell (1), a discharge pipe (21) being fixedly connected to the bottom output end of the storage tank (11), a regulating valve (12) being mounted on the top of the discharge pipe (21), and a plurality of through holes (22) being provided at the bottom of the discharge pipe (21).

5. The oil removal device for treating oily wastewater in an oil depot according to claim 1, characterized in that: The aeration assembly comprises a blower (14) installed outside the housing (1); an output end of the blower (14) is fixedly connected to an air inlet pipe (15); and the other end of the air inlet pipe (15) is fixedly connected to an aeration pipe network (16).

6. The oil removal device for treating oily wastewater in an oil depot according to claim 1, characterized in that: A cavity (18) is provided in the middle of the shell (1), and the treatment cylinder (5) is installed inside the cavity (18) via a bracket.

7. The oil removal device for treating oily wastewater in an oil depot according to claim 1, characterized in that: A collection trough (10) is fixedly connected to the interior of the housing (1), and the collection trough (10) is installed outside the filter screen (8). A discharge hopper (13) is installed on one side of the collection trough (10), and the end of the discharge hopper (13) extends to the outside of the housing (1).

8. The oil removal device for treating oily wastewater in an oil depot according to claim 2, characterized in that: A scraper (9) is also installed at the output end of the motor (6), and the scraper (9) is in contact with the inner wall of the filter screen (8).

9. The oil removal device for treating oily wastewater in an oil depot according to claim 7, characterized in that: A bracket (19) is fixedly connected to the outside of the shell (1), a collecting box (20) is placed on the upper part of the bracket (19), and the opening end of the discharge hopper (13) is located on the upper part of the collecting box (20).

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