Oily wastewater evaporation and concentration treatment equipment

Abstract

The utility model discloses oily wastewater evaporation and concentration treatment equipment which comprises a centrifugal filter, an oil-water separator, an evaporation barrel, a condensation barrel, a circulating water tank and a vacuum-pumping assembly, a water pump I pumps oily wastewater into the centrifugal filter, the evaporation barrel is communicated with the centrifugal filter, the condensation barrel is communicated with the evaporation barrel, the circulating water tank is communicated with the condensation barrel, and the vacuum-pumping assembly is connected with the oil-water separator. The vacuumizing assembly is communicated with the condensation barrel and the circulating water tank. The equipment is used for treating oily wastewater, grease in the wastewater can be effectively separated, the oil-water separation precision and efficiency are improved, the overall treatment effect is more stable and reliable, the vacuumizing assembly is adopted for vacuumizing, negative pressure flowing of layered bottom wastewater in the centrifugal filter to other devices can be achieved, and the oil-water separation efficiency is improved. Meanwhile, waste water in the evaporation barrel can be evaporated at a lower temperature through vacuumizing, so that the energy consumption required by evaporation is reduced, the evaporation efficiency is improved, and the whole treatment process has lower energy consumption and less secondary pollution and is more energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model belongs to the technical field of oily wastewater treatment, and particularly relates to an evaporation and concentration treatment device for oily wastewater. Background Technique

[0002] Industries such as petrochemical and machining will discharge wastewater containing oil substances. These oil substances include natural petroleum, petroleum products, tar and its fractions, as well as edible animal and vegetable oils and fats, etc. If oily wastewater is directly discharged into water bodies, an oil film will form on the water surface, preventing oxygen from entering the water body, resulting in oxygen deficiency in the water, and then endangering aquatic organisms and polluting the environment. Therefore, effective treatment of oily wastewater is an important environmental protection measure. Currently, when treating oily wastewater, usually the oily wastewater is gathered together and left standing for a period of time, so that the oil and water in the oily wastewater are stratified due to density differences, and then the oil droplets on the upper layer are sucked away. This standing treatment method has low treatment efficiency, and the treated water quality still contains many particulate impurities that are difficult to effectively remove by the standing method, affecting the overall treatment effect, and long-term standing is also likely to cause water quality deterioration and secondary pollution and other problems. Summary of the Invention

[0003] The purpose of the utility model is to provide a technical solution for an evaporation and concentration treatment device for oily wastewater aiming at the deficiencies of the existing technology. The structure design is ingenious and reasonable, and it has strong practicability. By treating oily wastewater with this device, the grease in the wastewater can be effectively separated, the oil-water separation accuracy and efficiency can be improved, and the wastewater can be further evaporated and condensed to improve the water quality of the final treatment. The overall treatment effect is more stable and reliable. Compared with the existing standing method, the treatment time can be greatly shortened. At the same time, a vacuum pumping component is used in the device to pump vacuum, which can realize the negative pressure flow of the wastewater at the bottom layer of the centrifugal filter to other devices. At the same time, pumping vacuum enables the evaporation of the wastewater in the evaporation barrel to be carried out at a lower temperature, reducing the energy consumption required for evaporation and improving the evaporation efficiency. The whole treatment process has lower energy consumption and less secondary pollution, and is more energy-saving and environmentally friendly.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0005] Oil-containing wastewater evaporation and concentration treatment equipment, including a centrifugal filter, an oil-water separator, an evaporation barrel, a condensation barrel, a circulation water tank and a vacuum extraction assembly. The centrifugal filter is connected to a water pump I, and the water pump I pumps the oil-containing wastewater into the centrifugal filter. The centrifugal filter filters the incoming oil-containing wastewater. The oil-water separator includes a steel belt and a scraper. The steel belt is vertically tensioned, and the lower part of the steel belt extends into the liquid to be separated after filtration in the centrifugal filter. The evaporation barrel is connected to the centrifugal filter, and the separated wastewater is evaporated by the evaporation barrel. The condensation barrel is connected to the evaporation barrel, and the evaporated water vapor is condensed by the condensation barrel. The circulation water tank is connected to the condensation barrel, and the condensed water is transported into the circulation water tank. The vacuum extraction assembly is connected to the condensation barrel and the circulation water tank; the centrifugal filter, the oil-water separator, the evaporation barrel and the condensation barrel are the core treatment components of the equipment. First, impurities such as particulate matter in the oil-containing wastewater are separated by the centrifugal filter. Then, the oil in the oil-containing wastewater is separated by the oil-water separator. After removing the oil, the wastewater is sucked out from the bottom of the centrifugal filter under negative pressure by the vacuum extraction assembly, first enters the evaporation barrel for evaporation treatment, the evaporated water vapor then enters the condensation barrel for condensation, and the condensed water is then transported to the circulation water tank under negative pressure by the vacuum extraction assembly. The whole process is simple and reasonable. Through particulate filtration, oil-containing wastewater separation, and evaporation and condensation of wastewater, the treatment effect is improved.

[0006] Further, a vacuum degree detection sensor is provided on the condensation barrel. The vacuum degree is detected by the vacuum degree detection sensor to ensure that the vacuum degree meets the design requirements, so as to meet the negative pressure flow of the wastewater and ensure the normal operation and use of the whole equipment.

[0007] Further, a filter bag is provided in the centrifugal filter. The filter bag is connected to a driver. The filter bag is driven to rotate by the driver to realize the centrifugal filtration of the oil-containing wastewater. The driver is not drawn in the figure. Generally, a common drive motor assembly of the centrifugal filter is used for the driver. The motor shaft of the drive motor assembly is connected to the filter bag, so that the filter bag can be driven to rotate centrifugally by the drive motor assembly, and the liquid and solid particulate matter in the oil-containing wastewater can be efficiently and quickly separated in the filter bag, significantly improving the treatment efficiency.

[0008] Further, the vacuum extraction assembly includes a jet ejector and a water pump II. The jet ejector is connected in series between the condensation barrel and the circulation water tank, and the water pump II is connected in series between the circulation water tank and the jet ejector. The water in the circulation water tank is circulated and transported into the jet ejector by the water pump II. The jet ejector utilizes the negative pressure effect generated by the water flow to enhance the vacuum degree, ensuring the overall stability and reliability, and making the wastewater treatment more efficient.

[0009] Further, a drain port is provided on the circulation water tank, which can facilitate the regular discharge of the water in the circulation water tank.

[0010] Furthermore, heat exchange coils are provided in both the evaporation barrel and the condensation barrel. A heat exchange medium circulates within the heat exchange coils. The design is ingenious and reasonable. The heat exchange coils have a large heat exchange area, which can increase the full contact between the heat exchange medium and the wastewater in the evaporator and the water vapor in the condensation barrel, achieve efficient heat transfer, ensure the heat exchange rate, and thus improve the processing capacity and efficiency of the equipment.

[0011] Furthermore, the heat exchange medium is a refrigerant. The temperature of the refrigerant transported to the heat exchange coils in the evaporation barrel is 29 - 35°C. In this application, the temperature of the refrigerant in the evaporation barrel is controlled within the range of 29 - 35°C. Combined with the vacuum pumping treatment of the vacuum pumping assembly, the evaporation of the wastewater in the evaporation barrel can occur at a relatively low temperature, thereby reducing the energy consumption required for evaporation and improving the evaporation efficiency. The heat exchange medium uses a refrigerant, and the heat conduction efficiency of the refrigerant is high, which can efficiently transfer heat and improve the heat exchange efficiency.

[0012] Furthermore, the vacuum degree in the condensation barrel is 0.093 - 0.096 KPa. Ensuring that the vacuum degree is within a stable range can improve the overall stability.

[0013] Furthermore, a stop valve one is connected and provided between the evaporation barrel and the centrifuge filter. The stop valve one can flexibly control the conduction or cut-off of the pipeline between the evaporation barrel and the centrifuge filter.

[0014] Furthermore, the bottom of the evaporation barrel is connected with a circulation pipeline. A water pump three is provided on the circulation pipeline. The water pump three is connected and conducted with the water pump one through the circulation pipeline. A stop valve two is provided on the circulation pipeline between the water pump three and the evaporation barrel. When the wastewater at the bottom of the centrifuge filter flows towards the evaporation barrel, it may still carry a small amount of grease. After the wastewater evaporates in the evaporation barrel, the liquid remaining at the bottom of the evaporation barrel is suctioned by the water pump three and transported into the water pump one for re-treatment, thereby effectively improving the oil recovery rate. The stop valve two can realize the conduction or cut-off of the circulation pipeline between the water pump three and the evaporation barrel, so that the liquid accumulated at the bottom of the evaporation barrel can be pumped out regularly.

[0015] Due to the adoption of the above technical solutions, the present utility model has the following beneficial effects:

[0016] The structure of the utility model is ingeniously and reasonably designed and has strong practicability. By using this device to treat oily wastewater, it can effectively separate the grease in the wastewater, improve the precision and efficiency of oil-water separation, further evaporate and condense the wastewater, improve the quality of the finally treated water, the overall treatment effect is more stable and reliable, and compared with the existing static method, the treatment time can be greatly shortened. At the same time, a vacuum pumping component is used in the device to pump vacuum, which can realize the negative pressure flow of the wastewater at the bottom layer in the centrifugal filter to other devices. At the same time, the vacuum pumping enables the evaporation of the wastewater in the evaporation barrel to be carried out at a lower temperature, reducing the energy consumption required for evaporation, improving the evaporation efficiency, and having lower energy consumption and less secondary pollution during the whole treatment process, being more energy-saving and environment-friendly. Brief Description of the Drawings

[0017] The following further describes the present utility model with reference to the drawings:

[0018] Figure 1 It is a structural block diagram of the oily wastewater evaporation and concentration treatment device of the present utility model.

[0019] In the figure: 1 - vacuum degree detection sensor; 2 - circulation water tank; 3 - centrifugal filter; 4 - oil-water separator; 5 - evaporation barrel; 6 - condensation barrel; 7 - water pump one; 8 - steel belt; 9 - scraper; 10 - stop valve two; 11 - filter bag; 12 - ejector; 13 - water pump two; 14 - drain port; 15 - heat exchange coil; 16 - stop valve one; 17 - circulation pipeline; 18 - water pump three; 19 - oil drain port. Detailed Embodiment

[0020] As Figure 1As shown in the figure, the present utility model relates to an evaporation and concentration treatment device for oily wastewater, which includes a centrifugal filter 3, an oil-water separator 4, an evaporation barrel 5, a condensation barrel 6, a circulating water tank 2 and a vacuum pumping assembly. The centrifugal filter 3 is connected to a first water pump 7. The first water pump 7 pumps the oily wastewater into the centrifugal filter 3. The centrifugal filter 3 filters the incoming oily wastewater. The filtered oily wastewater settles and stratifies in the centrifugal filter 3, with the oil on the upper layer and the wastewater on the lower layer. The oil-water separator 4 includes a steel belt 8 and a scraper 9. The steel belt 8 is vertically tensioned. The lower part of the steel belt 8 extends into the liquid to be separated after filtration in the centrifugal filter 3. The steel belt 8 will adsorb the oil during the conveying process. When the steel belt 8 drives the oil to rotate to the scraper 9, the scraper 9 scrapes the oil off the steel belt 8, and finally converges and discharges from the oil discharge port 19 of the oil-water separator 4, realizing the separation of oil and wastewater. The structure of the oil-water separator 4 can refer to the steel belt type oil-water separator (publication number: CN216963640U) disclosed in the existing patent literature. The evaporation barrel 5 is communicated with the centrifugal filter 3, and the separated wastewater is evaporated by the evaporation barrel 5. The condensation barrel 6 is communicated with the evaporation barrel 5, and the condensation barrel 6 condenses the evaporated water vapor. The circulating water tank 2 is communicated with the condensation barrel 6, and the condensed water is conveyed into the circulating water tank 2. The vacuum pumping assembly is communicated with the condensation barrel 6 and the circulating water tank 2. A drain port 14 is provided on the circulating water tank 2, and the drain port 14 can facilitate the regular discharge of the water in the circulating water tank 2. The centrifugal filter 3, the oil-water separator 4, the evaporation barrel 5 and the condensation barrel 6 are the core treatment components of the device. First, the centrifugal filter 3 separates impurities such as particulate matter in the oily wastewater. Then, the oil-water separator 4 separates the oil in the oily wastewater. The wastewater after removing the oil is sucked out from the bottom of the centrifugal filter 3 under negative pressure by the vacuum pumping action of the vacuum pumping assembly, and first enters the evaporation barrel 5 for evaporation treatment. The evaporated water vapor then enters the condensation barrel 6 for condensation, and the condensed water is then negatively conveyed into the circulating water tank 2 under the action of the vacuum pumping assembly. The principle of the whole process is clear and reasonable. Through particulate filtration, oil-water separation, and evaporation and condensation of wastewater, the treatment effect is improved.

[0021] A vacuum degree detection sensor 1 is provided on the condensation barrel 6. The vacuum degree is detected by the vacuum degree detection sensor 1 to ensure that the vacuum degree meets the design requirements, so as to meet the negative pressure flow of the wastewater and ensure the normal operation and use of the whole device. The vacuum degree in the condensation barrel 6 is 0.093 - 0.096 KPa, ensuring that the vacuum degree is within a stable range, which can improve the overall stability.

[0022] The centrifugal filter 3 is provided with a filter bag 11. The filter bag 11 is connected to a driver, and the driver drives the filter bag 11 to rotate, so as to realize the centrifugal filtration of the oily wastewater. The driver is not drawn in the figure. Generally, a common drive motor assembly of the centrifugal filter 3 is used. The motor shaft of the drive motor assembly is connected to the filter bag 11, so that the drive motor assembly can drive the filter bag 11 to rotate centrifugally, enabling the efficient and rapid separation of the liquid and solid particles in the oily wastewater in the filter bag 11, and significantly improving the treatment efficiency.

[0023] The vacuum pumping assembly includes a jet ejector 12 and a second water pump 13. The jet ejector 12 is communicatively arranged between the condensation barrel 6 and the circulation water tank 2, and the second water pump 13 is communicatively arranged between the circulation water tank 2 and the jet ejector 12. The second water pump 13 conveys the water in the circulation water tank 2 to the jet ejector 12 in a circulating manner. The jet ejector 12 utilizes the negative pressure effect generated by the water flow to enhance the vacuum degree, ensuring the overall stability and reliability, and making the wastewater treatment more efficient.

[0024] Heat exchange coils 15 are provided in both the evaporation barrel 5 and the condensation barrel 6. A heat exchange medium circulates in the heat exchange coils 15. The design is ingenious and reasonable. The heat exchange coils 15 have a large heat exchange area, which can increase the full contact between the heat exchange medium and the wastewater in the evaporator and the water vapor in the condensation barrel 6, realizing the efficient transfer of heat, ensuring the heat exchange rate, and thus improving the processing capacity and efficiency of the equipment. The heat exchange medium is a refrigerant. The temperature of the refrigerant conveyed to the heat exchange coils 15 in the evaporation barrel 5 is 29 - 35°C. In this application, the temperature of the refrigerant in the evaporation barrel 5 is controlled within the range of 29 - 35°C. Combined with the vacuum pumping treatment of the vacuum pumping assembly, the evaporation of the wastewater in the evaporation barrel 5 can be carried out at a relatively low temperature, thereby reducing the energy consumption required for evaporation and improving the evaporation efficiency. The heat exchange medium uses a refrigerant, and the heat conduction efficiency of the refrigerant is high, which can efficiently transfer heat and improve the heat exchange efficiency.

[0025] A stop valve 16 is communicatively arranged between the evaporation barrel 5 and the centrifugal filter 3. The stop valve 16 can flexibly control the conduction or cut-off of the pipeline between the evaporation barrel 5 and the centrifugal filter 3. The bottom of the evaporation barrel 5 is connected with a circulation pipeline 17. A third water pump 18 is arranged on the circulation pipeline 17. The third water pump 18 is connected and communicated with the first water pump 7 through the circulation pipeline 17. A stop valve 10 is arranged on the circulation pipeline 17 between the third water pump 18 and the evaporation barrel 5. When the wastewater at the bottom of the centrifugal filter 3 flows towards the evaporation barrel 5, it may still carry a small amount of grease. After the wastewater evaporates in the evaporation barrel 5, the liquid remaining at the bottom of the evaporation barrel 5 is sucked by the third water pump 18 and conveyed into the first water pump 7 for re-treatment, thereby effectively improving the recovery rate of grease. The stop valve 10 can realize the conduction or cut-off of the circulation pipeline 17 between the third water pump 18 and the evaporation barrel 5, so that the liquid accumulated at the bottom of the evaporation barrel 5 can be pumped out regularly.

[0026] The structure of the utility model is ingeniously and reasonably designed and has strong practicability. By using this device to treat oily wastewater, it can effectively separate the oil in the wastewater, improve the accuracy and efficiency of oil-water separation, further evaporate and condense the wastewater, improve the quality of the finally treated water, the overall treatment effect is more stable and reliable, and compared with the existing static method, the treatment time can be greatly shortened. At the same time, a vacuum pumping component is used in the device to pump vacuum, which can realize the negative pressure flow of the wastewater at the bottom of the layer in the centrifugal filter 3 to other devices. At the same time, the vacuum pumping enables the evaporation of the wastewater in the evaporation barrel 5 to be carried out at a lower temperature, reducing the energy consumption required for evaporation and improving the evaporation efficiency. The whole treatment process has lower energy consumption and less secondary pollution, and is more energy-saving and environment-friendly.

[0027] The above are only specific embodiments of the utility model, but the technical features of the utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made on the basis of the utility model to achieve basically the same technical effects are all covered by the protection scope of the utility model.

Claims

1. Oily wastewater evaporation and concentration treatment equipment, characterized by include: A centrifugal filter, wherein the centrifugal filter is connected to a water pump, wherein the water pump pumps the oily wastewater into the centrifugal filter, and the centrifugal filter performs filtering treatment on the oily wastewater; an oil-water separator, wherein the oil-water separator comprises a steel belt and a scraper, wherein the steel belt is vertically tensioned, and the lower part of the steel belt extends into the liquid to be separated after being filtered in the centrifugal filter; An evaporation barrel, the evaporation barrel is connected to the centrifugal filter, and the separated wastewater is evaporated through the evaporation barrel; A condensation barrel, the condensation barrel is connected to the evaporation barrel, and the condensation barrel performs condensation processing on the evaporated water vapor; A circulating water tank, the circulating water tank is connected to the condensation barrel, and the condensed water is transported to the circulating water tank; A vacuum pumping component is connected to the condensation barrel and the circulating water tank.

2. The oily wastewater evaporation concentration treatment equipment according to claim 1 is characterized in that: The condensation barrel is provided with a vacuum detection sensor.

3. The oily wastewater evaporation concentration treatment equipment according to claim 1 is characterized in that: The vacuum degree in the condensation barrel is 0.093-0.096 KPa.

4. The oily wastewater evaporation concentration treatment equipment according to claim 1 is characterized in that: A filter bag is arranged in the centrifugal filter, and the filter bag is connected to a driver. The driver drives the filter bag to rotate, thereby realizing centrifugal filtration of oily wastewater.

5. The oily wastewater evaporation concentration treatment equipment according to claim 1 is characterized in that: The vacuum pump assembly includes an ejector and a second water pump. The ejector is connected between the condensation barrel and the circulating water tank. The second water pump is connected between the circulating water tank and the ejector. The water in the circulating water tank is circulated and transported to the ejector through the second water pump.

6. The oily wastewater evaporation concentration treatment equipment according to claim 1 is characterized by: The circulating water tank is provided with a drain outlet.

7. The oily wastewater evaporation concentration treatment equipment according to claim 1 is characterized by: The evaporation barrel and the condensation barrel are both provided with heat exchange coils, and heat exchange medium circulates in the heat exchange coils.

8. The oily wastewater evaporation concentration treatment equipment according to claim 7 is characterized in that: The heat exchange medium is a refrigerant, and the temperature of the refrigerant in the heat exchange coil transported to the evaporator is 29-35°C.

9. The oily wastewater evaporation concentration treatment equipment according to claim 1 is characterized by: A stop valve 1 is provided between the evaporation barrel and the centrifugal filter.

10. The oily wastewater evaporation concentration treatment equipment according to claim 1, characterized in that: A circulation pipeline is connected to the bottom of the evaporation barrel, a water pump three is arranged on the circulation pipeline, the water pump three is connected to the water pump one through the circulation pipeline, and a stop valve two is arranged on the circulation pipeline between the water pump three and the evaporation barrel.

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