28 results about "Oil concentration" patented technology

The present disclosure relates to a measuring method and device for trace and ultra-trace oil content. The measuring device of the present disclosure includes a cryogenic enriching device, an extracting device and an infrared spectrometer; The cryogenic enriching device includes a Dewar container and a U-shaped pipe; The extracting device includes an extractant container, an input pipe, an outlet pipe and an extraction liquid quantitative pipe; A mass flowmeter is further disposed on the U-shaped pipe, the oil content in the gas is calculated according to the measured total mass of the gas and the oil concentration of the extraction liquid measured by the infrared spectrometer. The present disclosure further provides a measuring method, which converts the measurement of oil content in gas into the measurement of oil concentration in liquid extractant through effective extraction by liquid nitrogen cold trap enrichment mode, and adopts infrared spectrophotometry to accurately measure.

This utility model discloses a separator with oil concentration monitoring and feedback control, including an inlet pipe connected to a wastewater tank, a centrifugal pump and a scraper filter connected to the inlet pipe, and a heater connected to the outlet of the scraper filter. The heater outlet is connected to a three-way pipe, with two solenoid valves installed on the other two ends of the three-way pipe. The pipe containing the first solenoid valve is connected to the separator; the pipe containing the second solenoid valve is connected to the wastewater return port pipe of the wastewater tank. The separator has a return water branch pipe, on which several solenoid valves are installed. All solenoid valves are connected to an electrical control box. The return water branch pipe is connected to the wastewater return port pipe and is respectively connected to a clean water outlet and a detection water outlet. An oil concentration detection device is installed on the connecting pipe between the return water branch pipe and the detection water outlet. This separator can quickly, accurately, and in large quantities separate oil and water, improving resource recovery and utilization rates and the automation level of wastewater treatment, and reducing wastewater treatment costs for enterprises.

The utility model discloses a falling film return oil concentration device for a flooded unit. The falling film return oil concentration device comprises the flooded unit, a fluorine pump and a falling film return oil concentration device, a fluorine pump is communicated with a liquid outlet in the upper portion and a fluorine inlet of a falling film return oil concentration device in the lower portion, the fluorine inlet of the falling film return oil concentration device is communicated into the falling film return oil concentration device, and a refrigerant and oil mixture pumped in the flooded unit is subjected to heat exchange treatment in the falling film return oil concentration device. And the refrigerant gas enters the flooded unit again from the falling film return oil concentration device and flows to an inlet of the compressor through a pipeline via a fluorine outlet of the flooded unit, oil in the mixed liquid is concentrated and then discharged through an oil return port of the falling film return oil concentration device at the bottom, and the mixed liquid continues to return to the compressor for lubrication through a pipeline. Through simple and low-cost structural improvement, the accumulation phenomenon of lubricating oil in the heat exchanger is effectively reduced, the heat exchange efficiency of an evaporator and a condenser is improved, the service life of a compressor is prolonged, the lubricating oil is effectively recycled, and the effects of saving energy and improving efficiency are achieved.

The invention relates to the technical field of oily wastewater treatment, in particular to an oil-water separator, and solves the problems of low separation efficiency and poor adaptability and automation degree of existing equipment. The oil-water separator comprises a main cabin and an auxiliary cabin and is matched with a water inlet system, a water outlet system, an aeration system, an oil scraping system, an oil discharge system, a cleaning system and a plurality of groups of sensors, the laser particle size analysis sensor is linked with the aeration system to realize the matching of bubbles and oil particle sizes, and the oil level sensor automatically switches the oil scraping mode of a scraper and the oil discharge mode of an oil discharge valve according to the thickness of an oil layer; the secondary cabin completes secondary filtration and oil phase collection; the filter membrane is provided with a reverse aeration cleaning structure, the box body is further provided with a cleaning system, and the interior of the equipment can be automatically cleaned at high pressure. According to the oil-water separator, all systems and parts are jointly controlled by the control module in a centralized manner, so that full-process automatic operation is realized, and the oil-water separator is adaptive to wastewater treatment requirements of different oil-containing concentrations and oil particle sizes, and can be applied to the scenes of industry, catering, oilfield exploitation and the like.

The invention relates to the technical field of oil exploration, in particular to a three-dimensional quantitative fluorescent logging method which comprises the following steps: acquiring and preprocessing solid samples (well wall coring, well drilling coring and rock debris) and liquid samples (drilling fluid additives and drilling fluid), and acquiring fluorescence data after mathematical statistics; and combining the fluorescence data to calculate the oil concentration and the contrast level, judging the property of the crude oil and calculating the oiliness index, finally identifying the property of the reservoir fluid according to the oiliness index and the contrast level parameter, and determining whether the reservoir fluid is a gas layer, an oil layer, a same oil-water layer, a water layer or a dry layer by means of a two-dimensional interpretation chart and the like. According to the invention, the technical effect of effectively and accurately identifying the reservoir fluid properties in geological exploration is achieved.

Provided is an oil extractant that can be manufactured at low cost, has high oil extraction efficiency, and has a small environmental load, for use in an oil concentration meter or the like. The oil extractant contains an oligomer of a trimer or more of chlorotrifluoroethylene in a range of greater than 35% by weight and 100% by weight or less, relative to the entire oil extractant.

The invention discloses an offshore water oil concentration monitoring method based on three-dimensional fluorescence and liquid level compensation. The method comprises the following steps: S1, measuring the liquid level height, the fluorescence intensity and the fluorescence spectrum of a current to-be-measured water body to obtain the real-time liquid level height, the real-time fluorescence intensity and the mixed fluorescence spectrum; s2, acquiring a correction factor under the real-time liquid level height according to a pre-calibrated correction curve, and calculating to obtain corrected fluorescence intensity by combining the real-time fluorescence intensity; s3, comparing the fluorescence spectrum in the step S1 with standard oil type spectrum data to identify the type of the mixed oil type in the water body to be detected; and S4, selecting a corresponding quantitative analysis method according to the spectrum overlapping degree of different oil types in the fluorescence spectrum so as to determine the actual concentration of the mixed oil type. According to the invention, the influence of liquid level fluctuation on light intensity is dynamically offset, and the accuracy and reliability of concentration measurement are ensured; by utilizing a three-dimensional fluorescence spectrum and a linear superposition principle, identification and accurate quantification of mixed oil types are realized.

This invention discloses an oil-water separation system for industrial oily wastewater enhanced by centrifugal force, relating to the field of industrial wastewater treatment technology. The system includes a data acquisition module that acquires wastewater flow rate and oil concentration monitoring signals, generating raw operating condition data streams; a parameter analysis module that extracts flow rate and oil droplet size distribution characteristics, constructs a set of physical property parameters, calculates suitable centrifugal speed and chamber pressure setpoints using a centrifugal force field configuration model, and generates directional centrifugal force field control commands; a flow channel control module that establishes a spirally converging flow channel matching the oil droplet trajectory; a coalescence induction module that guides tiny oil droplets to coalesce into large-diameter oil clumps along the wall normal; a layered export module that independently exports the oil and water phases; and a closed-loop feedback module that monitors the oil content of the separated product stream and iteratively updates the commands. This system achieves dynamic adaptation between the centrifugal force field and the flow channel configuration, enhancing the oil droplet coalescence effect and improving oil-water separation accuracy and operational stability.

The invention belongs to the technical field of water quality monitoring, and discloses an oil content detection method, device and equipment and a storage medium. The method comprises the following steps: controlling an ultraviolet light source to emit dual-wavelength ultraviolet light with preset light intensity to a short-range cuvette containing a flowing water sample to be detected; acquiring two paths of transmitted light signals, and performing amplification and signal conversion processing on the two paths of transmitted light signals to obtain two paths of digital signals; calculating the absorbance of the two paths of transmitted light signals according to the two paths of digital signals, and obtaining the oil content of the water sample to be detected according to the absorbance of the two paths of transmitted light signals; differential detection is carried out on a water sample to be detected through dual-wavelength ultraviolet light, the wide-range detection capacity is kept based on optical signal amplification and signal conversion, meanwhile, interference of ammonia water color development and turbidity on a detection result is effectively restrained, and through combination of absorbance difference and the Lambert-Beer law, the detection accuracy is improved. A stable linear relation between the oil concentration and a detection signal is realized, and the oil content is accurately detected.

The application discloses a kind of pipeline mixed oil concentration distribution determination method, device, equipment, medium and product.The method comprises: obtaining pipeline parameters and pipeline oil parameters, according to the pipeline parameters and the pipeline oil parameters, determine diffusion coefficient and convection phase correction coefficient;According to the diffusion coefficient, the convection phase correction coefficient, the pipeline parameters and the pipeline oil parameters, determine the mixed oil concentration distribution in pipeline, the mixed oil concentration distribution in pipeline is used to characterize the corresponding relationship between mixed oil concentration and pipeline length, the mixed oil concentration includes: the percentage of methanol volume in total mixed oil volume, and / or, the percentage of diesel volume in total mixed oil volume, by the technical scheme of the application, the mixed oil concentration distribution in pipeline can be accurately determined, to provide reference for mixed oil control and processing.

This invention provides an oil concentration measuring device and an oil concentration measuring method. An oil concentration measuring device for cleaning solutions is provided that does not require expensive spectroscopic elements, detection elements, etc. The oil concentration measuring device (10) comprises: a light irradiation unit (104) that irradiates the target liquid (cleaning solution) with irradiation light having a measurement wavelength, the measurement wavelength being a predetermined wavelength between 280 nm and 300 nm; a transmitted light detection unit (105) that measures the intensity of transmitted light obtained by the irradiation light passing through the target liquid; and an oil concentration determination unit (1061) that calculates the absorbance of the target liquid at the measurement wavelength based on the intensity of the transmitted light measured by the transmitted light detection unit (105), and determines the oil concentration in the target liquid based on the absorbance value and a calibration curve representing the relationship between the oil concentration at the measurement wavelength and the absorbance.

The utility model discloses a cutting fluid two-way separating and filtering mechanism which comprises a filtering box, the top end of the filtering box is movably connected with a box cover, the two ends of the two sides of the bottom of the filtering box are fixedly connected with supporting legs, and the bottom ends of the two sides of the filtering box are fixedly connected with liquid outlet pipes. And the top end of the box cover is provided with a two-way separation mechanism for classified filtration. According to the cutting fluid two-way separating and filtering mechanism, the electric cylinder is arranged, cutting fluid is guided into the feeding hopper during filtering, the oil concentration detector in the feeding hopper can automatically detect the oil concentration in the cutting fluid so as to judge the type of the cutting fluid, and information is transmitted to the controller; the controller detects a signal to start the electric cylinder to drive the material blocking seat to move through the piston rod, the material guiding valve is opened after the material blocking seat is moved to a designated position, the cutting fluid can flow towards one side and is guided into one side of the interior of the filtering box through the liquid conveying opening in the bottom to be filtered, and the problem that classified filtering cannot be achieved is solved.

The application discloses a kind of based on manned submersible's submarine pipeline leak source searching method and system, method includes: the system model of establishing including submarine oil spill diffusion model, submersible upper layer control model and oil concentration sensor model;Based on the estimation framework of bayes, fusion real-time measurement information, adopt particle filter iterative update the posterior probability distribution of leak source state;Based on posterior distribution, adopt exploration and development dual control strategy to construct objective function, solve optimal control quantity and expected target position;According to target position, based on the dynamics model of submersible, design based on interference observer's backstepping controller drive submersible accurate tracking.The application realizes the autonomous positioning of leak source under complex submarine environment, with strong adaptability, high search efficiency, the advantages of good anti-interference ability, suitable for emergency search task of sudden leakage.

The present application relates to the technical field of oily wastewater treatment, and particularly relates to an oil-water separator, which solves the problems of low separation efficiency, poor adaptability and low automation degree of the existing equipment. The oil-water separator comprises a main cabin and a secondary cabin, and is matched with a water inlet system, a drainage system, an aeration system, an oil scraping system, an oil discharge system, a cleaning system and multiple sensors. The laser particle size analysis sensor is linked with the aeration system to realize the adaptation of the bubble and the oil particle size. The oil level sensor automatically switches the oil scraping mode of the scraper and the oil discharge mode of the oil discharge valve according to the thickness of the oil layer. The secondary cabin completes secondary filtration and oil phase collection. The filter membrane is configured with a reverse aeration cleaning structure, and the box body is also provided with a cleaning system to automatically clean the inside of the equipment under high pressure. The control module centrally links and controls each system and component of the oil-water separator to realize automatic operation of the whole process, adapt to the wastewater treatment requirements of different oil concentration and oil particle size, and can be applied to industrial, catering, oil field exploitation and other scenes.

The application relates to an online monitoring temperature correction method and system for oil in water based on a fluorescence method, and the method comprises the following steps: preparing oil in water standard samples with different concentrations; measuring the fluorescence signals of the standard samples to obtain experimental measurement data; synchronously collecting temperature parameters, sensor fluorescence response characteristics and light source real-time intensity at each temperature point to form a data set; constructing a light source intensity compensation model, the input being fluorescence intensity, light source real-time intensity and temperature data, and the output being a fluorescence intensity reference value after temperature correction; performing fluorescence temperature compensation calculation based on the fluorescence intensity reference value after temperature correction to obtain corrected fluorescence intensity; and calculating the oil in water concentration based on the corrected fluorescence intensity. The application can accurately capture the nonlinear coupling relationship between temperature and fluorescence response, break through the limitation of the existing linear correction model, combine light source intensity compensation, and solve the detection error caused by the double interference of temperature and light source drift.

The invention discloses a fluorescent probe light window pollution compensation device and method for monitoring oil content in water, and belongs to the technical field of underwater detection. The device comprises a flow cell, a dual-channel fluorescent probe assembly, an oil film uniform distribution brush and a control and data processing module. To-be-detected water is temporarily stored in the flow cell. The dual-channel fluorescence probe assembly is arranged in the flow cell to detect the oil content, and comprises an exciting light LED, a light window, a fluorescence detection unit for obtaining the fluorescence intensity of oil in water and a pollution detection unit for obtaining the fluorescence intensity of an oil film. The oil film uniform distribution brush wipes the light window so that the thickness of the oil film is consistent; and the control and data processing module is used for calculating the attenuation rate of exciting light, compensating the fluorescence intensity and updating the fluorescence intensity-oil concentration calibration curve so as to eliminate curve baseline drift caused by light window pollution. According to the fluorescent probe light window pollution compensation device and method for monitoring the oil content in water, quantitative correction of light window pollution can be achieved, the maintenance period is prolonged, and the measurement precision and the unattended capability are improved.

The invention provides a fluorescence and scattering signal mutual correction oil concentration detection method in water, and belongs to the technical field of analysis and detection, and the specific steps are as follows: firstly, based on natural water CDOM and crude oil presenting different signal responses in each fluorescence detection channel, obtaining each substance separation quantitative equation set; preparing oil-in-water to-be-detected solutions with different concentrations for detection; calculating the content of crude oil in the to-be-detected solution according to the separation quantitative equation set; a backscattering channel signal is added, and a fluorescence signal is dynamically compensated through scattering in a high-concentration interval of oil in water, so that the measurement of the concentration of the oil in water is more accurate. According to the method, the problems of interference of CDOM in real seawater on measurement of the oil concentration in water and measurement deviation caused by fluorescence quenching can be solved at the same time, and high-precision identification of the oil concentration in a high-complexity water body environment is achieved.

The application discloses a kind of oil-containing sludge detection method, equipment and medium, it is related to biochemical detection technical field, including, phosphate buffer solution is added to sample processing container and starts mechanical stirring equipment to carry out uniform stirring to oil-containing sludge sample, form uniform slurry liquid;Uniform slurry liquid is treated by ultrasonic wave processing reactor and is treated by ultrasonic wave irradiation, and form broken emulsion liquid mixture;Broken emulsion liquid mixture is injected into group response bacteria reaction pool, and form activated mixture;Activated mixture is detected dynamically, and impedance signal is output, and ultraviolet light is used to carry out light excitation, and optical verification signal is acquired;Impedance signal and optical verification signal are input into fusion algorithm and are cross-validated and weighted calculation, and the output of biological available oil concentration value.The application realizes the accurate quantification of oil-containing sludge biological available oil concentration by the synergism of group response bacteria biological activation and impedance-optical dual-signal fusion dual-mechanism.

The present application relates to air conditioning technical field, provide a kind of air conditioner compressor's back liquid determination method, device and air conditioner, air conditioner compressor's back liquid determination method includes: obtaining the suction superheat of compressor and the oil concentration of compressor suction side;According to the suction superheat of compressor and the oil concentration of compressor suction side, it is determined whether compressor exists back liquid risk.The present application is by using the suction superheat of compressor and the oil concentration of compressor suction side to comprehensively determine whether compressor exists back liquid risk, can avoid the problem of high probability of single parameter misjudgment, improve the accuracy of back liquid risk determination of compressor, reach the purpose of protecting compressor, to ensure the reliability of air conditioner normal operation.

The method for analyzing the dissolved gas in the transformer oil comprises a dissolved gas content measuring method and a dissolved gas concentration measuring method, and the gas content measuring method comprises the steps that pressure is pumped to be vacuum, and the initial pressure before oil injection is obtained after the pressure is balanced; heating after oil injection to control the temperature to be constant at a first degassing temperature, carrying out degassing treatment, obtaining the balance pressure after degassing after the pressure is balanced, obtaining the pressure difference according to the initial pressure and the balance pressure, and calculating and obtaining the gas content of the oil sample to be detected in combination with a gas content correction model; according to the gas concentration measurement method, the in-oil concentration of the gas is obtained by obtaining the gas phase concentration, the gas content and the gas-liquid conversion coefficient. Compared with the prior art, through the core concept of designing the gas content correction model, the non-linear precision problem of the vacuum degassing method is solved, the differential pressure measurement process is standardized, and the measurement precision and reliability of the whole process are effectively improved.

The invention relates to the related technical field of monitoring the state and parameters of refrigeration oil in an oil pool inside a running compressor, in particular to a system for monitoring the state of refrigeration oil in the oil pool when the compressor runs. The compressor is connected with a condenser and an evaporator through copper pipes to form a loop; the system for monitoring the state of refrigeration oil in the oil pool during operation of the compressor is connected with the compressor through a copper pipe; the system comprises an oil viscosity monitoring module, an oil concentration monitoring module, an oil state monitoring module and an oil operation parameter monitoring module. According to the technical scheme, the problems that in the prior art, the state of refrigerant oil in an oil pool in a compressor cannot be monitored and analyzed, so that the state of the refrigerant oil in the oil pool cannot be accurately evaluated, and the reliability evaluation of the compressor cannot be supported are solved.

The utility model relates to the technical field of detection devices, in particular to an automatic wire drawing oil concentration detection device, which comprises a mounting plate, a wire drawing oil concentration detection device and a wire drawing oil concentration detection device, the threaded column is arranged in the inner hole of the mounting plate and is mounted in a sliding manner along the length direction of the inner hole; the stirring shaft is rotationally mounted in an inner cavity of the threaded column, a mounting seat is coaxially arranged on the stirring shaft, and a plurality of stirring paddles are arranged on the mounting seat at equal intervals; the mounting column is rotationally mounted in a shaft cavity of the stirring shaft, and a sensor is mounted on the mounting column; the assembly part is fixedly mounted on the threaded column, and the mounting column is fixedly connected with the assembly part in a matched manner; the driving mechanism is mounted on the assembly part, and the driving mechanism is used for providing rotating force for the stirring shaft; the lifting mechanism is mounted on the mounting plate and is used for adjusting the working heights of the stirring paddle and the sensor; the structure is simple, and detection is convenient and efficient.

The utility model relates to the technical field of wiredrawing oil concentration detection, in particular to an automatic wiredrawing oil concentration detection device with an automatic cleaning function, which comprises a mounting frame, a wiredrawing oil concentration detection device and a wiredrawing oil concentration detection device, the supporting shaft is rotationally mounted in the shaft hole of the mounting frame, and a guide rod is arranged on the supporting shaft; the moving part is mounted on the guide rod; the assembly part is mounted on the moving part, an optical sensor is mounted on the assembly part, and the optical sensor is used for detecting the concentration of the drawing oil; the cleaning mechanism is mounted on the mounting frame, and the cleaning mechanism is used for cleaning the optical sensor; the driving mechanism is mounted on the mounting frame and is used for driving the optical sensor to be switched between a detection position and a cleaning position by the supporting shaft; the guide mechanism is mounted on the mounting frame and used for adjusting the connecting position of the moving part and the guide rod, so that the optical sensor adapts to the detection position and the cleaning position; the cleaning detection efficiency is improved, and the use convenience is improved.

The present application relates to a kind of methanol-low phase soluble finished oil sequential transport when the method for screening and injecting length of spacer fluid, comprising: obtaining the density, viscosity of methanol, low phase soluble finished oil and to be tested spacer fluid and the length, pipe diameter, temperature and flow rate of to be transported pipeline;Methanol-to-be tested spacer fluid, low phase soluble finished oil-to-be tested spacer fluid phase solubility experiment is carried out, whether to be tested spacer fluid can be used as the spacer fluid of methanol-low phase soluble finished oil sequential transport is evaluated;Methanol-to-be tested spacer fluid-low phase soluble finished oil three medium phase solubility experiment is carried out, determine the maximum phase solubility ratio and maximum demixing critical concentration of methanol and low phase soluble finished oil in to-be tested spacer fluid;Establish the mixed oil calculation model of methanol-to-be tested spacer fluid, low phase soluble finished oil-to-be tested spacer fluid sequential transport;Based on mixed oil calculation model, the mixed oil length and mixed oil concentration distribution of methanol-to-be tested spacer fluid, low phase soluble finished oil-to-be tested spacer fluid are calculated, and the minimum injection length of to-be tested spacer fluid is calculated.

The invention provides a converter transformer single hydrogen device state detection system and method, and belongs to the technical field of converter transformer single hydrogen device state detection. In order to solve the technical problem that an existing state evaluation instrument cannot efficiently and accurately test the accuracy of a single hydrogen device, a simulation pipeline is arranged in the middle of the side wall of a closed oil cylinder, an oil taking opening is formed in the lower portion of the side wall of the closed oil cylinder, and an oil discharging opening is formed in the bottom of the closed oil cylinder; an electric heater and an oil thermometer are further arranged on the inner wall of the closed oil cylinder; an oil pressure gauge and an air bag are arranged on the inner side of the top of the closed oil cylinder, the air bag is connected with an air pump arranged on the outer side of the closed oil cylinder through a pipeline, and a pressure relief opening is further formed in the pipeline. When the single hydrogen device is evaluated, the oil temperature and oil pressure can be ensured to be controllable, the standard oil concentration at the oil taking port is ensured to be consistent with the oil taking concentration detected by the single hydrogen device, and the accuracy of the single hydrogen device is detected.

This invention provides a method, apparatus, electronic device, and storage medium for treating mixed oil in refined oil pipelines. The method includes: determining the maximum permissible concentration of upstream oil mixed with downstream oil and the maximum permissible concentration of downstream oil mixed with upstream oil; obtaining the maximum volume of upstream oil diluted by the surplus index of downstream oil at each intermediate station based on the planned download volume and maximum permissible concentration of downstream oil at each intermediate station; determining a maximum safety factor based on the maximum volume at each intermediate station, the maximum permissible concentration, the correspondence between the upstream oil concentration and the download mixed oil volume corresponding to each intermediate station and the terminal transportation station, and the storage tank volume; and determining the required download mixed oil volume and maximum concentration at each intermediate station based on the maximum safety factor and the corresponding relationship at each intermediate station, thereby achieving full-line mixed oil re-blending while ensuring oil quality and improving transportation efficiency.

The invention discloses an oily sludge detection method, equipment and a medium, and relates to the technical field of biochemical detection.The oily sludge detection method comprises the steps that a phosphate buffer solution is added into a sample treatment container, mechanical stirring equipment is started to stir an oily sludge sample at a constant speed, and uniform slurrying liquid is formed; performing ultrasonic irradiation treatment on the uniform slurrying liquid through an ultrasonic treatment reactor to form a demulsified liquid mixture; injecting the demulsified liquid mixture into a quorum sensing bacteria reaction tank to form an activated mixture; performing dynamic sensing detection on the activated mixture, outputting an impedance signal, and performing illumination excitation by adopting ultraviolet light to obtain an optical verification signal; and inputting the impedance signal and the optical verification signal into a fusion algorithm for cross validation and weighted calculation, and outputting a biological available oil concentration value. Through quorum sensing bacterium biological activation and impedance-optical dual-signal fusion dual-mechanism cooperation, accurate quantification of the concentration of the bio-available oil in the oily sludge is realized.

This invention relates to the field of wire drawing oil concentration detection technology, and particularly to an automatic detection method and system for wire drawing oil concentration. The method includes: after a detection command is triggered, performing closed-loop self-cleaning on the optical prisms of the detection chamber, reference chamber, and dual-path refractive detection unit; after cleaning, injecting a standard zero-point medium into the detection chamber; and performing zero-point self-calibration through the dual-path refractive detection unit; collecting a sample of the working fluid of the wire drawing oil to be tested, injecting the sample into the detection chamber, and simultaneously acquiring the refractive index data of the detection optical path and the reference optical path through the dual-path refractive detection unit to calculate the concentration detection value of the working fluid. This invention solves the problems of low accuracy and poor stability in detection methods, achieving accurate and stable automatic detection of wire drawing oil concentration and ensuring processing quality.