Method for sampling and detecting oil removal effect of oil remover

Abstract

The invention discloses a method for sampling and detecting the oil removal effect of an oil remover, which is characterized in that a sampling bottle with an inlet and an outlet is arranged, gas cylinder valves are correspondingly arranged at the inlet and the outlet to serve as a sampler, the sampling bottle is flushed during sampling to improve the accuracy of a sampling medium, and the sampling bottle passes through a flash tank with a larger volume to reduce the pressure of the medium and then is cooled and condensed during measurement; the oil dirt is separated out, the oil dirt in a medium is better reserved, volatilization of the oil dirt is reduced, after gas is emptied, heating is conducted, moisture is volatilized, finally, the oil content is measured through a weighing method, and sampling detection is conducted at the inlet end and the outlet end of the degreaser in the same mode. The oil removal effect of the degreaser can be reflected by the change of the oil content of the inlet end and the outlet end of the degreaser. According to the sampling and detecting method for the oil removal effect of the degreaser, the detection precision and the detection accuracy of the oil removal effect of the degreaser are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detecting the oil removal effect of an oil separator. More specifically, the present invention relates to a method for sampling and detecting the oil removal effect of an oil separator. Background Art

[0002] With the continuous improvement of the requirement for the oil content of the medium in the process, gas oil separators are increasingly widely used.

[0003] Regarding the exact oil removal effect, there is a lack of effective detection methods. Conventional direct sampling with gas cylinders has low detection accuracy. When detecting, the gas is directly discharged, and the mass of the liquid is measured. When discharging the gas, some oil stains will be carried away, resulting in low measurement accuracy. Summary of the Invention

[0004] An object of the present invention is to solve at least the above problems and provide at least the advantages described hereinafter.

[0005] Another object of the present invention is to provide a method for sampling and detecting the oil removal effect of an oil separator to solve the technical problem that the detection result of the oil removal effect of the existing oil separator is inaccurate.

[0006] To achieve these and other advantages in accordance with the present invention, there is provided a method for sampling and detecting the oil removal effect of an oil separator, including the following steps: S1. Sampling systems are respectively and parallely connected to the main pipeline at the inlet end and the main pipeline at the outlet end of the oil separator. The sampling system includes a venting system and a sampler connected in sequence towards the oil separator. A diffuser is parallely connected to the pipeline between the venting system and the sampler; S2. Sampling: At the inlet end and the outlet end of the oil separator, the sampler and the venting system are respectively and parallely connected. The inside of the sampler is flushed by venting, and then the sampling system is sealed. At this time, the pressure in the container of the sampler is P, the volume is V, and the temperature is T. According to the standard gas equation pV = nRT, the volume N under the standard state is obtained by conversion, so as to obtain the volume N1 of the sample in the sampler at the inlet end of the oil separator under the standard state and the volume N2 of the sample in the sampler at the outlet end of the oil separator under the standard state; S3. Detection: A diffuser is parallely connected between the sampler and the venting system to reduce the pressure of the medium in the sampler. The pressure after reaching equilibrium in the sampler and the diffuser is P 11 , and the freezing point T of the oil stain is calculated according to the characteristics of the oil stain at P 11 , and the temperature of the sampler and the diffuser is reduced to T 11 , 11Next, make the oil stain condense and precipitate, then use the venting system to vent the sampler and the expander. After that, heat and volatilize the water in the remaining medium, weigh the obtained liquid, and respectively obtain the mass m1 of the oil stain before treatment at one side of the inlet end of the oil separator and the mass m2 of the oil stain after treatment at the outlet end of the oil separator; S4. The oil stain content Q1 before the oil separator treatment = m1 / N1, and the oil stain content Q2 after the oil separator treatment = m2 / N2. Compare Q1 and Q2 to evaluate the oil removal effect of the oil separator.

[0007] Preferably, the sampling system includes a first sampler, a first expander, and a first venting system provided at the inlet end of the oil separator, and a second sampler, a second expander, and a second venting system provided at the outlet end of the oil separator. The outlet end of the first sampler is connected in parallel to the inlet end of the oil separator through an inlet pipeline, and a first sampling valve is provided on the inlet pipeline. The first venting system includes a first venting pipeline and a first venting valve provided on the first venting pipeline. The inlet end of the first sampler is connected to the first expander / the first venting pipeline in a switching manner. The inlet end of the second sampler is connected in parallel to the outlet end of the oil separator through an outlet pipeline, and a second sampling valve is provided on the outlet pipeline. The second venting system includes a second venting pipeline and a second venting valve provided on the second venting pipeline. The outlet end of the second sampler is connected to the second expander / the second venting pipeline in a switching manner. The opening and closing of the sampling system at the inlet end of the oil separator are controlled by the first sampling valve and the first venting valve, and the opening and closing of the sampling system at the outlet end of the oil separator are controlled by the second sampling valve and the second venting valve.

[0008] Preferably, the first sampler includes a first sampling bottle, and a first gas cylinder valve and a second gas cylinder valve for sealing the corresponding ports are respectively provided at the outlet and inlet ends of the first sampling bottle. The first gas cylinder valve is connected to the inlet pipeline. The first expander includes a third sampling bottle, and a fifth gas cylinder valve and a sixth gas cylinder valve for sealing the corresponding ports are respectively provided at the outlet and inlet ends of the third sampling bottle; When venting the first sampling bottle, the first gas cylinder valve, the second gas cylinder valve, the first venting valve, and the first sampling valve are opened, the fifth gas cylinder valve and the sixth gas cylinder valve are closed, and the first sampling bottle is communicated with the first venting pipeline; When reducing the medium pressure in the first sampling bottle, the second gas cylinder valve and the fifth gas cylinder valve are opened, and the first gas cylinder valve and the sixth gas cylinder valve are closed; When venting the first sampling bottle and the first expander, the first gas cylinder valve, the second gas cylinder valve, the fifth gas cylinder valve, the sixth gas cylinder valve, the first venting valve, and the first sampling valve are opened.

[0009] Preferably, the second sampler includes a second sampling bottle, and a third gas cylinder valve and a fourth gas cylinder valve for sealing the corresponding ports are respectively arranged at the inlet and outlet ends of the second sampling bottle. The third gas cylinder valve is connected to the outlet pipeline. The second expander includes a fourth sampling bottle, and a seventh gas cylinder valve and an eighth gas cylinder valve for sealing the corresponding ports are respectively arranged at the inlet and outlet ends of the fourth sampling bottle; When venting the second sampling bottle, the third gas cylinder valve, the fourth gas cylinder valve, the second vent valve, and the second sampling valve are opened, the seventh gas cylinder valve and the eighth gas cylinder valve are closed, and the second sampling bottle is communicated with the second vent pipeline; When reducing the medium pressure in the second sampling bottle, the fourth gas cylinder valve and the seventh gas cylinder valve are opened, and the third gas cylinder valve and the eighth gas cylinder valve are closed; When venting the second sampling bottle and the second expander, the third gas cylinder valve, the fourth gas cylinder valve, the seventh gas cylinder valve, the eighth gas cylinder valve, the second vent valve, and the second sampling valve are opened.

[0010] Preferably, starting from new for the oil separator, a time interval t is set, and detection is carried out in time periods in sequence. During the nth time interval t, the oil content Qn1 and Qn2 before and after the treatment of the oil separator are obtained simultaneously. n is the number of t. The travel distance of the medium in the oil separator is L. Pressure detection gauges are respectively arranged at the inlet end and the outlet end of the oil separator, and the pressure values before and after oil removal of the oil separator are respectively Pn1 and Pn2. A flow velocity sensor is also arranged at the inlet end of the oil separator, and the medium flow velocity e at the inlet end of the oil separator is obtained, and the proportional parameter , the time compensation parameter of the medium passing through the oil separator , then the oil removal efficiency Through the oil removal efficiency W n Evaluate the oil removal effect of the oil separator at the current stage.

[0011] The present invention has at least the following beneficial effects: For the sampling and detection method of the oil removal effect of the oil separator of the present invention, a sampling bottle with an inlet and an outlet is provided, and gas cylinder valves are respectively arranged corresponding to the inlet and outlet as a sampler. When sampling, the sampling bottle is first rinsed to improve the accuracy of the sampling medium. During measurement, the medium pressure is first reduced through an expander with a larger volume, and then cooling and condensation are carried out to precipitate the oil stain, better retaining the oil stain in the medium and reducing the volatilization of the oil stain. After venting the gas, heating is carried out to volatilize the moisture, and finally the oil content is measured by the weighing method. The same sampling and detection method is respectively adopted for the inlet end and the outlet end of the oil separator, and the change in the oil content at the inlet end and the outlet end of the oil separator can reflect the oil removal effect of the oil separator. The sampling and detection method of the oil removal effect of the oil separator of the present invention significantly improves the detection accuracy and the accuracy of detecting the oil removal effect of the oil separator.

[0012] Other advantages, objectives, and features of the present invention will be partially reflected in the following description and partially understood by those skilled in the art through the research and practice of the present invention. Description of the Drawings

[0013] Figure 1 It is a schematic layout structure diagram of the sampling system when the present invention detects the oil removal effect of the oil separator; Figure 2 It is a schematic connection structure diagram for expanding the volume of the first sampling bottle when the present invention detects the oil removal effect of the oil separator; Figure 3 It is a schematic connection structure diagram for expanding the volume of the second sampling bottle when the present invention detects the oil removal effect of the oil separator; Reference numerals in the drawings: 1. Oil separator, 2. Filter element, 3. First sampling valve, 4. Second sampling valve, 5. Inlet pipeline, 6. Outlet pipeline, 7. First vent pipeline, 8. First vent valve, 9. Second vent pipeline, 10. Second vent valve, 11. First sampling bottle, 12. Second sampling bottle, 13. Third sampling bottle, 14. Fourth sampling bottle, 111. First gas cylinder valve, 112. Second gas cylinder valve, 113. Third gas cylinder valve, 114. Fourth gas cylinder valve, 115. Fifth gas cylinder valve, 116. Sixth gas cylinder valve, 117. Seventh gas cylinder valve, 118. Eighth gas cylinder valve. Detailed Embodiments

[0014] The following further describes the present invention in detail with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0015] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by the terms "horizontal", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0016] As Figures 1-3 shown, the present invention provides a method for sampling and detecting the oil removal effect of an oil separator, including the following steps: S1. Connect and arrange a sampling system in parallel on the main pipelines at the inlet end and the outlet end of the oil separator 1 respectively. The sampling system includes a venting system and a sampler connected in sequence towards the oil separator 1, and an expander is connected in parallel on the pipeline between the venting system and the sampler; S2. Sampling. At the inlet and outlet of the degreaser, connect the sampler and the venting system in parallel, vent and flush the inside of the sampler, and then close the sampling system. At this time, the pressure in the sampler container is P, the volume is V, and the temperature is T. According to the standard gas equation pV=nRT, the volume N under standard conditions is converted, thereby obtaining the volume N1 of the sample in the sampler at the inlet of the degreaser and the volume N2 of the sample in the sampler at the outlet of the degreaser under standard conditions; S3, detection, connect the expansion container in parallel between the sampler and the venting system to reduce the medium pressure in the sampler. The pressure after the sampler and the expansion container reach equilibrium is P 11 According to the characteristics of oil pollution, the oil pollution in P 11 Pour point under pressure T 11 , lower the temperature of the sampler and expansion vessel to T 11 Next, the oil is condensed and precipitated, and then the sampler and the expansion container are emptied by the venting system, and then the water in the remaining medium is volatilized by heating, and the obtained liquid is weighed to obtain the oil mass m1 before treatment on the inlet side of the degreaser and the oil mass m2 after treatment on the outlet side of the degreaser; S4. The oil content before degreasing is Q1=m1 / N1, and the oil content after degreasing is Q2=m2 / N2. Compare Q1 and Q2 to evaluate the degreasing effect of the degreasing device.

[0017] Specifically, the sampling system includes a first sampler, a first expander, and a first venting system arranged at the inlet end of the deoiler, and a second sampler, a second expander, and a second venting system arranged at the outlet end of the deoiler. The outlet end of the first sampler is connected in parallel to the inlet end of the deoiler 1 through an inlet pipeline 5, and a first sampling valve 3 is arranged on the inlet pipeline 5. The first venting system includes a first venting pipeline 7 and a first venting valve 8 arranged on the first venting pipeline 7. The inlet end of the first sampler is switchably connected to the first expander / first venting pipeline 7. The inlet end of the second sampler is connected in parallel to the outlet end of the deoiler 1 through the outlet pipeline 6, the outlet pipeline 6 is provided with a second sampling valve 4, the second venting system includes a second venting pipeline 9 and a second venting valve 10 provided on the second venting pipeline 9, the outlet end of the second sampler is switchably connected with the second expansion vessel / second venting pipeline 9, the opening and closing of the sampling system at the inlet end of the deoiler 1 is controlled by the first sampling valve 3 and the first venting valve 8, and the opening and closing of the sampling system at the outlet end of the deoiler 1 is controlled by the second sampling valve 4 and the second venting valve 10; The first sampler includes a first sampling bottle 11. A first gas cylinder valve 111 and a second gas cylinder valve 112 for sealing the corresponding ports are respectively arranged at the outlet and inlet ends of the first sampling bottle 11. The first gas cylinder valve 111 is connected to the inlet pipeline 5. The first expander includes a third sampling bottle 13. A fifth gas cylinder valve 115 and a sixth gas cylinder valve 116 for sealing the corresponding ports are respectively arranged at the outlet and inlet ends of the third sampling bottle 13; The second sampler includes a second sampling bottle 12. A third gas cylinder valve 113 and a fourth gas cylinder valve 114 for sealing the corresponding ports are respectively arranged at the inlet and outlet ends of the second sampling bottle 12. The third gas cylinder valve 113 is connected to the outlet pipeline 6. The second expander includes a fourth sampling bottle 14. A seventh gas cylinder valve 117 and an eighth gas cylinder valve 118 for sealing the corresponding ports are respectively arranged at the inlet and outlet ends of the fourth sampling bottle 14.

[0018] When venting the first sampling bottle 11, the first gas cylinder valve 111, the second gas cylinder valve 112, the first vent valve 8, and the first sampling valve 3 are opened, the fifth gas cylinder valve 115 and the sixth gas cylinder valve 116 are closed, and the first sampling bottle 11 is communicated with the first vent pipeline 7; When reducing the medium pressure in the first sampling bottle 11, the second gas cylinder valve 112 and the fifth gas cylinder valve 115 are opened, and the first gas cylinder valve 111 and the sixth gas cylinder valve 116 are closed; When venting the first sampling bottle 11 and the first expander, the first gas cylinder valve 111, the second gas cylinder valve 112, the fifth gas cylinder valve 115, the sixth gas cylinder valve 116, the first vent valve 8, and the first sampling valve 3 are opened; When venting the second sampling bottle 12, the third gas cylinder valve 113, the fourth gas cylinder valve 114, the second vent valve 10, and the second sampling valve 4 are opened, the seventh gas cylinder valve 117 and the eighth gas cylinder valve 118 are closed, and the second sampling bottle 12 is communicated with the second vent pipeline 9; When reducing the medium pressure in the second sampling bottle 12, the fourth gas cylinder valve 114 and the seventh gas cylinder valve 117 are opened, and the third gas cylinder valve 113 and the eighth gas cylinder valve 118 are closed; When venting the second sampling bottle 12 and the second expander, the third gas cylinder valve 113, the fourth gas cylinder valve 114, the seventh gas cylinder valve 117, the eighth gas cylinder valve 118, the second vent valve 10, and the second sampling valve 4 are opened.

[0019] Sampling and detection method for the oil removal effect of the oil separator of the present invention. A sampling bottle with an inlet and an outlet is provided, and gas cylinder valves are correspondingly arranged at the inlet and the outlet as a sampler. When sampling, the sampling bottle is first rinsed to improve the accuracy of the sampling medium. During measurement, first, a larger-volume expander is used to reduce the medium pressure, and then cooling and condensation are carried out to precipitate the oil stain, which better retains the oil stain in the medium and reduces the volatilization of the oil stain. After releasing the air, heating is carried out to volatilize the moisture. Finally, the oil content is measured by the weighing method. The same method is used for sampling and detection at the inlet end and the outlet end of the oil separator respectively. The change in the oil content at the inlet end and the outlet end of the oil separator can reflect the oil removal effect of the oil separator. The sampling and detection method for the oil removal effect of the oil separator of the present invention significantly improves the detection accuracy and the accuracy of detecting the oil removal effect of the oil separator.

[0020] In another technical solution, starting from the brand-new state of the oil separator, a time interval t is set, and detection is carried out in sequence by time periods. During the nth time interval t, the oil stain contents Qn1 and Qn2 before and after the treatment of the oil separator are obtained simultaneously. n is the number of t, and the traveling distance of the medium in the oil separator is L. Pressure detection gauges are respectively arranged at the inlet end and the outlet end of the oil separator to obtain the pressure values Pn1 and Pn2 of the oil separator before and after oil removal. A flow velocity sensor is also arranged at the inlet end of the oil separator, and the medium flow velocity e at the inlet end of the oil separator is obtained. Calculate the proportional parameter k = Pn 2 / Pn1, and the time compensation parameter a of the medium passing through the oil separator is a = L / e. Then the oil removal efficiency W n =(a * Qn1 - k * Qn2) / (a * Qn1). Through the oil removal efficiency W n evaluate the oil removal effect of the oil separator at the current stage.

[0021] There is a certain time difference when the medium passes through the oil separator for oil removal. When simultaneously collecting and detecting the change in the oil content at the inlet and outlet ends of the oil separator, there may be a small difference between the medium objects before and after the oil removal of the oil separator, which affects the accuracy of detecting the oil removal effect. Moreover, as the oil separator 1 operates, the filter element 2 adheres to more oil stains, and there will be a certain degree of decline in the filtration efficiency and speed of the medium. Therefore, under the general default conditions that the medium flow velocity is uniform and certain, and the oil removal efficiency of a certain amount range of the medium is uniform and proportional to the medium volume, by setting the time compensation parameter and the proportional amount of the medium passing through the oil separator, the calculation result of the oil removal efficiency can be made more accurate, and the change in the oil removal effect of the oil separator under long-term operation conditions can be better understood, which has good guiding significance for the design of the oil separator.

[0022] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the illustrated examples described herein.

Claims

1. A method for sampling and detecting the oil removal effect of an oil remover, characterized in that: The steps include: S1. A sampling system is connected in parallel to the main line at the inlet end and the main line at the outlet end of the degreaser, respectively. The sampling system includes a venting system and a sampler which are sequentially connected toward the degreaser, and an expansion container is connected in parallel to the pipeline between the venting system and the sampler; S2. Sampling. At the inlet and outlet of the degreaser, connect the sampler and the venting system in parallel, vent and flush the inside of the sampler, and then close the sampling system. At this time, the pressure in the sampler container is P, the volume is V, and the temperature is T. According to the standard gas equation pV=nRT, the volume N under standard conditions is converted, thereby obtaining the volume N1 of the sample in the sampler at the inlet of the degreaser and the volume N2 of the sample in the sampler at the outlet of the degreaser under standard conditions; S3, detection, connect the expansion container in parallel between the sampler and the venting system to reduce the medium pressure in the sampler. The pressure after the sampler and the expansion container reach equilibrium is P 11 According to the characteristics of oil pollution, the oil pollution in P 11 Pour point under pressure T 11 , lower the temperature of the sampler and expansion vessel to T 11 Next, the oil is condensed and precipitated, and then the sampler and the expansion container are emptied by the venting system, and then the water in the remaining medium is volatilized by heating, and the obtained liquid is weighed to obtain the oil mass m1 before treatment on the inlet side of the degreaser and the oil mass m2 after treatment on the outlet side of the degreaser; S4. The oil content before degreasing is Q1=m1 / N1, and the oil content after degreasing is Q2=m2 / N2. Compare Q1 and Q2 to evaluate the degreasing effect of the degreasing device.

2. The method for sampling and detecting the oil removal effect of the oil remover according to claim 1, characterized in that: The sampling system comprises a first sampler, a first expander, and a first venting system arranged at the inlet end of the oil remover, and a second sampler, a second expander, and a second venting system arranged at the outlet end of the oil remover. The outlet end of the first sampler is connected in parallel to the inlet end of the oil remover through an inlet pipeline, and a first sampling valve is arranged on the inlet pipeline. The first venting system comprises a first venting pipeline and a first venting valve arranged on the first venting pipeline. The inlet end of the first sampler is switchably connected to the first expander / first venting pipeline. The inlet end of the second sampler is connected in parallel to the outlet end of the oil remover through an outlet pipeline, and a second sampling valve is arranged on the outlet pipeline. The second venting system comprises a second venting pipeline and a second venting valve arranged on the second venting pipeline. The outlet end of the second sampler is switchably connected to the second expander / second venting pipeline. The opening and closing of the sampling system at the inlet end of the oil remover is controlled by the first sampling valve and the first venting valve, and the opening and closing of the sampling system at the outlet end of the oil remover is controlled by the second sampling valve and the second venting valve.

3. The method for sampling and detecting the oil removal effect of the oil remover according to claim 2, characterized in that: The first sampler comprises a first sampling bottle, and a first gas cylinder valve and a second gas cylinder valve for sealing the corresponding ports are respectively arranged at the outlet and the inlet of the first sampling bottle, and the first gas cylinder valve is connected to the inlet pipeline; the first expansion container comprises a third sampling bottle, and a fifth gas cylinder valve and a sixth gas cylinder valve for sealing the corresponding ports are respectively arranged at the outlet and the inlet of the third sampling bottle; When the first sampling bottle is emptied, the first gas cylinder valve, the second gas cylinder valve, the first venting valve, and the first sampling valve are opened, the fifth gas cylinder valve and the sixth gas cylinder valve are closed, and the first sampling bottle is connected to the first venting pipeline; When the medium pressure in the first sampling bottle is reduced, the second gas cylinder valve and the fifth gas cylinder valve are opened, and the first gas cylinder valve and the sixth gas cylinder valve are closed; When the first sampling bottle and the first expansion container are emptied, the first gas cylinder valve, the second gas cylinder valve, the fifth gas cylinder valve, the sixth gas cylinder valve, the first venting valve, and the first sampling valve are opened.

4. The method for sampling and detecting the oil removal effect of an oil remover according to claim 2, characterized in that: The second sampler comprises a second sampling bottle, and a third gas cylinder valve and a fourth gas cylinder valve for sealing the corresponding ports are respectively provided at the inlet and outlet ends of the second sampling bottle, and the third gas cylinder valve is connected to the outlet pipeline; the second expansion container comprises a fourth sampling bottle, and a seventh gas cylinder valve and an eighth gas cylinder valve for sealing the corresponding ports are respectively provided at the inlet and outlet ends of the fourth sampling bottle; When the second sampling bottle is emptied, the third gas cylinder valve, the fourth gas cylinder valve, the second venting valve, and the second sampling valve are opened, the seventh gas cylinder valve and the eighth gas cylinder valve are closed, and the second sampling bottle is connected to the second venting pipeline; When the medium pressure in the second sampling bottle is reduced, the fourth gas cylinder valve and the seventh gas cylinder valve are opened, and the third gas cylinder valve and the eighth gas cylinder valve are closed; When the second sampling bottle and the second expansion container are emptied, the third gas cylinder valve, the fourth gas cylinder valve, the seventh gas cylinder valve, the eighth gas cylinder valve, the second venting valve, and the second sampling valve are opened.

5. The method for sampling and detecting the oil removal effect of an oil remover according to claim 1, characterized in that: The oil remover starts from the beginning, sets the time interval t, and detects in turn in different time periods. Obtain the oil content Qn1 and Qn2 before and after the oil remover treatment in the nth time interval t, where n is the number of t, and the travel distance of the medium in the oil remover is L. Pressure detection gauges are set at the inlet and outlet of the oil remover, respectively, and the pressure values ​​of the oil remover before and after oil removal are Pn1 and Pn2, respectively. A flow meter sensor is also set at the inlet of the oil remover, and the medium flow rate e at the inlet of the oil remover is calculated to calculate the proportional parameter , time compensation parameters for the medium passing through the degreaser , then the oil removal efficiency Through the oil removal efficiency W n Evaluate the oil removal effect of the degreaser at the current stage.

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