A deep oil removal device for machining oily sludge

Abstract

This utility model discloses a deep oil removal device for mechanically processed oily sludge, including a bubble oil removal mechanism for the pre-treatment stage of water treatment. Oily wastewater can enter the bubble oil removal mechanism for oil removal. The bubble oil removal mechanism includes a waste liquid conditioning tank into which the oily wastewater enters. The mechanism also includes a mixing chamber and a bubble generator. The waste liquid conditioning tank is connected to the mixing chamber, allowing the oily wastewater to enter from the conditioning tank. At least a portion of the bubble generator extends into the mixing chamber, generating bubbles to carry away oil molecules from the wastewater. The treated wastewater is returned to the waste liquid conditioning tank for cyclic oil removal according to a specific period. Using this utility model, small molecule oils can be separated, effectively reducing the oil content of wastewater and improving wastewater treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of oil removal equipment technology, and in particular to a deep oil removal device for mechanically processing oily sludge. Background Technology

[0002] In large-scale industrial production activities, especially in machining and casting operations involving the handling of cutting fluids and emulsions, as well as on-site cleaning, the wastewater generated is mostly oil-rich. Direct discharge of this wastewater without proper treatment violates environmental regulations; therefore, wastewater treatment to meet compliant discharge standards is essential. Current wastewater treatment processes generally include key steps such as oil-water separation, dehydration, and drying to reduce volume. Traditional oil-water separation typically uses a flotation method, where wastewater flows through a separation tank, causing oil molecules to float to the surface. However, this method is inefficient. Even with baffles in some separation tanks to increase turbulence and flow time, allowing oil molecules to float more fully, industrial wastewater often contains large amounts of non-water-soluble mineral oil. This oil, due to prolonged mixing, forms a difficult-to-treat small-molecule oil dispersion system. Existing flotation methods are primarily effective for large-particle oil; their removal effect on highly dispersed, stable small-molecule oil particles in wastewater is extremely limited. This not only limits the overall efficiency of wastewater treatment, but may also result in a high concentration of oil remaining in the treated wastewater, making it difficult to meet environmental emission standards. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a deep oil removal device for mechanically processing oily sludge, which can separate small molecule oil, effectively reduce the oil content of wastewater, and improve the efficiency of wastewater treatment.

[0004] To solve the above-mentioned technical problems, this utility model provides a deep oil removal device for mechanically processed oily sludge, including a bubble oil removal mechanism, in which oily wastewater can enter for oil removal. The bubble oil removal mechanism includes a waste liquid conditioning tank, in which oily wastewater can enter.

[0005] The bubble oil removal mechanism also includes a mixing chamber and a bubble generator. The waste liquid conditioning tank is connected to the mixing chamber, and oily wastewater can enter the mixing chamber from the waste liquid conditioning tank. At least part of the bubble generator extends into the mixing chamber, and the bubble generator can generate bubbles in the mixing chamber to remove oil molecules in the oily wastewater.

[0006] As an improvement to the above solution, the deep oil removal device for mechanically processed oily sludge further includes a replenishment pump, which is connected between the waste liquid conditioning tank and the mixed liquid tank. The replenishment pump is used to pump the oily wastewater in the waste liquid conditioning tank into the mixed liquid tank.

[0007] As an improvement to the above solution, a liquid level sensor is provided in the waste liquid conditioning tank. The liquid level sensor is used to sense the water level in the waste liquid conditioning tank and is communicatively connected to the replenishment pump.

[0008] As an improvement to the above solution, the deep oil removal device for mechanically processed oily sludge further includes a booster pump and a mixing tank. The booster pump is connected between the mixing tank and the mixing liquid chamber. The mixing tank is connected to an external air source. The booster pump can pressurize the oily wastewater in the mixing liquid chamber, and the pressurized oily wastewater can enter the mixing tank for gas dissolution.

[0009] As an improvement to the above solution, the bubble generator is connected to the mixing tank, the bubble generator extends into the mixing liquid chamber, and the bubble generator can release the dissolved oily wastewater to generate bubbles.

[0010] As an improvement to the above solution, the deep oil removal device for machining oily sludge further includes a circulation drive component and oil scrapers. The number of oil scrapers is multiple and they are arranged above the liquid surface of the mixing tank. The circulation drive component is connected to the multiple oil scrapers in a transmission manner. The circulation drive component can drive the multiple oil scrapers to circulate and move on the liquid surface of the mixing tank to scrape off the floating oil.

[0011] As an improvement to the above solution, the mixing tank is provided with an oil collection tank and an oil drain pipe. The oil collection tank is located at the upper part of the mixing tank and below the end of the circulation transmission component. The oil collection tank is connected to the oil drain pipe, and the oil drain pipe is located at the lower part of the oil collection tank. The bottom of the oil collection tank is inclined.

[0012] As an improvement to the above solution, the mixing tank is further provided with an inlet pipe and an outlet pipe. The inlet pipe is located at the lower part of the mixing tank and is connected to the outlet of the waste liquid regulating tank. The outlet pipe is located at the upper part of the mixing tank and is connected to the inlet of the waste liquid regulating tank.

[0013] As an improvement to the above solution, a drain pipe is also provided on the mixing tank, the drain pipe being located at the lower part of the mixing tank and connected to the mixing tank.

[0014] Implementing this utility model has the following beneficial effects:

[0015] This utility model relates to a deep oil removal device for machining oily sludge, which includes a bubble oil removal mechanism. This mechanism comprises a waste liquid conditioning tank, a mixing tank, and a bubble generator. Oily wastewater enters the mixing tank from the waste liquid conditioning tank. The bubble generator generates bubbles within the mixing tank, with a diameter ranging from 800 nm to 15 μm. These bubbles possess extremely strong adsorption capacity. During the release and upward movement of the bubbles, small-molecule oil in the oily wastewater is adsorbed and carried away, achieving efficient oil concentration and oil-water separation. This effectively reduces the oil content of the wastewater and improves wastewater treatment efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the deep oil removal device for machining oily sludge according to this utility model;

[0017] Figure 2 This is a schematic diagram of the oil collection tank of this utility model. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0019] See Figure 1This utility model discloses a deep oil removal device for mechanically processed oily sludge, including a bubble oil removal mechanism 1. Oily wastewater can enter the bubble oil removal mechanism 1 for oil removal. The bubble oil removal mechanism 1 includes a waste liquid conditioning tank 11, into which the oily wastewater can enter. The oily wastewater is collected in a collection tank and undergoes primary oil removal before entering the waste liquid conditioning tank 11. The primary oil removal can be performed using a traditional oil flotation separation method. The bubble oil removal mechanism 1 also includes a mixing tank 12 and a bubble generator 13. The waste liquid conditioning tank 11 is connected to the mixing tank 12, allowing the oily wastewater to enter the mixing tank 12 for efficient oil removal. Specifically, at least a portion of the bubble generator 13 extends into the mixing tank 12 to facilitate the combination of the bubble generator 13 with the wastewater in the mixing tank 12 and the release of nanobubbles. The bubble generator 13 is connected to an external gas source. In use, the bubble generator 13 can generate bubbles in the mixing tank 12 to carry away oil molecules in the oily wastewater. Specifically, the bubble generator 13 uses high pressure to rapidly dissolve gas molecules in the liquid and precipitate them to form microbubbles. These bubbles typically have a diameter in the range of 800 nm to 15 μm, possessing extremely small volume and strong adsorption capacity. During the floating process, they can adsorb small molecule oil in the wastewater. After adsorption, the bubbles float and carry away the small molecule oil, achieving a highly efficient oil-water separation effect compared to traditional floating oil separation methods.

[0020] This invention employs a nanobubble oil removal method, utilizing the efficient collision and adhesion mechanism between bubbles and oil droplets to achieve efficient capture and separation of small molecule oils. This method enables deep removal of small molecule oils at a critical stage of water treatment, significantly reducing the oil content in water. It effectively reduces the oil content, which could have been as high as 20%, to around 5%, laying the foundation for further water removal in practical applications.

[0021] The beneficial effects of this utility model embodiment are as follows:

[0022] This utility model embodiment of the deep oil removal device for machining oily sludge includes a bubble oil removal mechanism 1, wherein the bubble oil removal mechanism 1 includes a waste liquid conditioning tank 11, a mixing liquid tank 12, and a bubble generator 13. Oily wastewater can enter the mixing liquid tank 12 from the waste liquid conditioning tank 11. The bubble generator 13 can generate bubbles in the mixing liquid tank 12. The diameter of the generated bubbles ranges from 800nm ​​to 15μm and has a very strong adsorption capacity. During the process of bubble release and floating, it can adsorb and float away small molecule oil in the oily wastewater, thereby achieving the effect of efficient concentration of oil and oil-water separation, thus effectively reducing the oil content of wastewater and improving the efficiency of wastewater treatment.

[0023] The deep oil removal device for mechanically processed oily sludge also includes a replenishing pump 2, which is connected between the waste liquid conditioning tank 11 and the mixed liquid tank 12. The replenishing pump 2 is used to pump the oily wastewater in the waste liquid conditioning tank 11 into the mixed liquid tank 12, which is equivalent to replenishing the mixed liquid tank 12 to continuously remove oil from the oily wastewater in the waste liquid conditioning tank 11.

[0024] The waste liquid conditioning tank 11 is equipped with a level sensor 111, which senses the water level in the tank. The level sensor 111 is communicatively connected to the replenishment pump 2. When the water level in the waste liquid conditioning tank 11 reaches a preset level, the replenishment pump 2 is activated to pump the wastewater from the tank into the mixing tank 12, thereby achieving continuous oil removal from the wastewater.

[0025] The deep oil removal device for mechanically processed oily sludge also includes a booster pump 3 and a mixing tank 4. The booster pump 3 is connected between the mixing tank 4 and the mixing liquid chamber 12. The booster pump 3 is used to pressurize the waste liquid in the mixing liquid chamber 12 to facilitate subsequent mixing with air in the mixing tank 4. In use, when the replenishment pump 2 is started, the booster pump 3 can draw oily wastewater from the mixing liquid chamber 12 and pressurize it. Pressurization can enhance the solubility of gas in liquid and also help to refine subsequent bubbles. The pressurized oily wastewater can enter the mixing tank 4 for gas dissolution. The bubble generator 13 is connected to the mixing tank 4. The output end of the bubble generator 13 extends into the mixing liquid chamber 12. The output end of the bubble generator 13 can release the dissolved oily wastewater. The dissolved oily wastewater re-enters the mixing liquid chamber 12 to release nanobubbles. The nanobubbles generated during the release push the small molecule oil in the wastewater to the surface.

[0026] In this embodiment of the invention, the number of mixing tanks is at least two, which can simultaneously remove oil from the waste liquid conditioning tank 11, with a processing capacity of more than 1.3 m³ / h.

[0027] After the small-molecule oil floats to the surface, to prevent the floating oil from re-entering the waste liquid conditioning tank 11, the deep oil removal device for machining oily sludge further includes a circulation drive 5 and oil scrapers 6 for scraping off the floating oil on the mixing tank 12. Multiple oil scrapers 6 are positioned above the liquid surface in the mixing tank 12. The circulation drive 5 is connected to the multiple oil scrapers 6, enabling the circulation drive 5 to drive the multiple oil scrapers 6 to circulate on the liquid surface of the mixing tank 12. The oil scrapers 6 can penetrate the liquid surface of the mixing tank 12, and during the circulating movement, they can scrape off the floating waste oil.

[0028] To collect and discharge the floating oil, the mixing tank 12 is equipped with an oil collection trough 121 and an oil drain pipe 122. The oil collection trough 121 is located at the upper part of the mixing tank 12 and below the end of the circulation transmission component 5. The oil collection trough 121 is isolated from the interior of the mixing tank 12. When the circulation transmission component 5 drives the scraper 6 to move downward, the scraper 6 scrapes the floating oil in the mixing tank 12 towards the oil collection trough 121. The scraped floating oil then enters the oil collection trough 121. The oil collection trough 121 is connected to the oil drain pipe 122, which is located at the lower part of the oil collection trough 121. The oil entering the oil collection trough 121 is discharged from the lower oil drain pipe 122. The bottom of the oil collection tank 121 is inclined, which facilitates the collection of oil at the bottom of the oil collection tank 121 and its discharge from the oil drain pipe 122. In use, the replenishment pump 2 and the circulation transmission component 5 are activated, scraping out waste oil and channeling it into the oil collection tank 121.

[0029] In addition, the mixing tank 12 is also equipped with an inlet pipe 123 and an outlet pipe 124. The inlet pipe 123 is located at the lower part of the mixing tank 12 and is connected to the outlet of the waste liquid conditioning tank 11. The oily wastewater in the waste liquid conditioning tank 11 can enter the mixing tank 12 through the inlet pipe 123, while the outlet pipe is located at the upper part of the mixing tank 12 and is connected to the inlet of the waste liquid conditioning tank 11. After oil removal, the wastewater can flow back to the waste liquid conditioning tank 11 through the outlet pipe 124. This replenishes the waste liquid conditioning tank 11 and dilutes it to a certain extent, facilitating subsequent bubble adsorption and oil removal.

[0030] In addition, after long-term use, some sludge residue will remain at the bottom of the mixing tank 12. In order to discharge this sludge residue, a drain pipe 125 is also provided on the mixing tank 12. The drain pipe is located at the bottom of the mixing tank 12 and is connected to the mixing tank 12. When it is necessary to discharge the sludge residue, the drain pipe 125 can be opened.

[0031] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A deep deoiling device for machining oily sludge, characterized by, It includes a bubble oil removal mechanism, into which oily wastewater can enter for oil removal. The bubble oil removal mechanism includes a waste liquid conditioning tank into which oily wastewater can enter. The bubble oil removal mechanism also includes a mixing tank and a bubble generator. The waste liquid conditioning tank is connected to the mixing tank. Oily wastewater can enter the mixing tank from the waste liquid conditioning tank. At least part of the bubble generator extends into the mixing tank. The bubble generator can generate bubbles in the mixing tank to remove oil molecules from the oily wastewater. The deep oil removal device for mechanically processed oily sludge also includes a booster pump and a mixing tank. The booster pump is connected between the mixing tank and the mixing liquid chamber. The mixing tank is connected to an external air source. The booster pump can pressurize the oily wastewater in the mixing liquid chamber. The pressurized oily wastewater can enter the mixing tank for gas dissolution. The bubble generator is connected to the mixing tank and extends into the mixing liquid chamber. The bubble generator can release dissolved oily wastewater to generate bubbles.

2. The apparatus for deep deoiling of mechanically treated oily sludge according to claim 1, characterized in that, The deep oil removal device for mechanically processed oily sludge also includes a replenishment pump, which is connected between the waste liquid conditioning tank and the mixed liquid tank. The replenishment pump is used to pump the oily wastewater in the waste liquid conditioning tank into the mixed liquid tank.

3. The apparatus for deep deoiling of mechanically treated oily sludge according to claim 2, characterized in that, The waste liquid conditioning tank is equipped with a liquid level sensor, which is used to sense the water level in the waste liquid conditioning tank. The liquid level sensor is communicatively connected to the replenishment pump.

4. The apparatus for deep deoiling of mechanically treated oil-containing sludge according to claim 1, characterized in that, The deep oil removal device for mechanically processed oily sludge further includes a circulation drive component and oil scrapers. There are multiple oil scrapers, which are arranged above the liquid surface of the mixing tank. The circulation drive component is connected to the multiple oil scrapers and can drive the multiple oil scrapers to circulate and move on the liquid surface of the mixing tank to scrape off the floating oil.

5. The apparatus for deep deoiling of mechanically treated oil-containing sludge according to claim 4, characterized in that, The mixing tank is equipped with an oil collection trough and an oil drain pipe. The oil collection trough is located at the upper part of the mixing tank and below the end of the circulation transmission component. The oil collection trough is connected to the oil drain pipe, and the oil drain pipe is located at the lower part of the oil collection trough. The bottom of the oil collection trough is inclined.

6. The apparatus for deep deoiling of mechanically treated oil-containing sludge according to claim 1, characterized in that, The mixing tank is also equipped with an inlet pipe and an outlet pipe. The inlet pipe is located at the lower part of the mixing tank and is connected to the outlet of the waste liquid regulating tank. The outlet pipe is located at the upper part of the mixing tank and is connected to the inlet of the waste liquid regulating tank.

7. The apparatus for deep deoiling of mechanically treated oil-containing sludge according to claim 1, characterized in that, The mixing tank is also equipped with a drain pipe, which is located at the bottom of the mixing tank and connected to the mixing tank.

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