CN112748236B - Method and device for rapidly detecting stability of heavy marine blended fuel oil - Google Patents
Method and device for rapidly detecting stability of heavy marine blended fuel oil Download PDFInfo
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2829—Mixtures of fuels
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a method for rapidly detecting the stability of heavy marine blended fuel oil. The invention adopts the two heating aging processes: ultrasonic aging is carried out under low oxygen atmosphere for the first time, and high oxidation activity in oxygen-enriched gas is utilized at high temperature after the second time of temperature rise to carry out deep oxidation on heavy blended fuel oil, so that the oxidation is more comprehensive. Through twice aging, the whole-course simulation of the heavy marine fuel oil in the oil storage cabin, the sedimentation cabin and the daily cabin is realized. The method can effectively shorten the aging time, and can directly obtain the detection data after the aging is finished, thereby effectively shortening the evaluation time.
Description
Technical Field
The invention belongs to the field of stability detection of heavy marine blended fuel oil, and particularly relates to a device and a method for rapidly detecting the stability of heavy marine blended fuel oil.
Background
The fuel oil yield of the domestic refinery ship is low, the gap between the fuel oil and the market demand is large, and the development of the shipping industry in China is seriously affected. The blending technology is used for blending some industrial waste oil into the marine fuel oil, so that not only can considerable economic benefit be brought to China petrochemical industry, but also environmental pollution can be effectively reduced, and the method is an effective method for improving the utilization rate of petroleum energy. But driven by benefits, the circulation field finds inferior marine fuel oil prepared by coal tar, waste engine oil, crude aromatic hydrocarbon, vegetable oil, tire rubber oil and the like. These complex sources of oil can form instability factors when incorporated into marine fuel oils: the heating process of the pump forms asphaltene or oil sludge, so that a filter screen of the oil distributor is blocked, engine corrosion and abrasion are seriously caused, the ignition quality of the fuel oil is also reduced due to the high aromatic oil product, and the health of a shipman and the marine environment are threatened. In addition, all indexes in the inferior heavy marine blended fuel oil meet the limit value in the national standard, so that the conventional detection means can not accurately measure the stability of the blended fuel oil on one side, and the conventional oil stability detection methods comprise detection means such as a P value method, a spot test (ASTM-D4740 standard), a K value method (ASTM D7061) and the like, but a unified method for detecting the stability of the fuel oil and the blending compatibility of the fuel oil does not exist at present. Therefore, how to accurately, rapidly and objectively judge the stability of the blended fuel oil becomes a problem to be solved urgently.
Chinese patent document with publication number CN 104764678A, entitled "a method for judging storage stability of heavy oil", discloses a method in which a densitometer is added to a test tube where heavy oil is located, and the densitometer is observed to change at constant temperature. This patent requires that the heavy oil be thermostated for 2 hours and then the densitometer readings be recorded every 8-24 hours and continuously for 2-15 days, with lengthy measurement times and therefore low market applicability.
Chinese patent publication No. CN 106556685A, entitled "a rapid detection method for storage stability of heavy marine fuel oil", discloses a gradient viscosity tube for detection, into which an oxygen-containing gas is introduced for accelerated oxidation; and respectively sampling and detecting from a plurality of sampling ports, and processing each group of measured data to obtain the property parameters of the fuel oil. In the scheme, 8 data are needed for detecting 4 indexes in each sample, the aging time and the time for measuring the indexes are accumulated for more than 16 hours, the process is complicated, and the time is relatively long.
Disclosure of Invention
The invention aims to provide a rapid detection device and a rapid detection method for heavy marine blended fuel oil, which are used for solving the problem that the conventional rapid detection device and the detection method for the stability of heavy marine blended fuel oil are lack and have poor effects.
The stability detection basis of the heavy marine blended fuel oil is that the storage and use period of the heavy marine fuel oil or the marine blended fuel oil is about 30 days, and the heavy marine blended fuel oil is respectively subjected to a storage tank, a precipitation tank (cabinet), an oil separator and a daily tank (cabinet), wherein the oil is heated to 70-80 ℃ in the precipitation tank (cabinet) and is kept for 24-36 hours; after passing through the oil separator, the mixture is heated to 90-98 ℃ in a daily cabinet for the use of an engine. The whole process is subjected to a second warming process for at least 30 hours to separate the precipitate from the blend.
The means such as high temperature and enhanced oxidation can rapidly age and lose stability of heavy marine blend fuel oil in a short time (< 10 hours), thereby simulating the stability change process of conventional heavy marine blend fuel oil. The stability of the blended oil is judged by judging the micro-pressure change generated by the density layering heterogeneity formed in the heavy marine blended fuel oil.
The first aspect of the invention provides a method for detecting the stability of blended fuel oil, which comprises the following steps:
(1) Providing a container which is a closed cylinder and comprises a feed inlet for adding fuel oil into the cylinder, an air inlet pipeline for introducing oxygen-containing gas into the cylinder, a heating device for heating the cylinder, an ultrasonic disperser for applying ultrasonic action to the fuel oil and an electronic micro-pressure sensor for measuring different high pressures in the cylinder;
(2) The marine fuel oil is injected into the container, and the pressure values P with different bit heights measured at the starting time t0 are recorded 0,1 、P 0,2 、…、P 0,n Wherein n is equal to or greater than 2, and the following is the same;
(3) Controlling the temperature of the fuel oil sample to be T1, introducing low-oxygen GAS GAS1 into the fuel oil sample, and controlling the aeration time to be T O1 The method comprises the steps of carrying out a first treatment on the surface of the Simultaneously starting an ultrasonic generator, dispersing and oxidizing the blended oil, standing for a period of time after the gas is completely introduced, and recording the time t 1 Measured differential bit high pressure value P 1,1 、P 1,2 、…、P 1,n ；
(4) Raising the temperature of the fuel oil sample to T2, introducing oxygen-enriched GAS GAS2 into the fuel oil sample, wherein the aeration time is T O2 The method comprises the steps of carrying out a first treatment on the surface of the After ventilation is finished, the temperature is reduced to T3, and the mixture is kept stand for a period of time to record the time T 1 Measured byDifferent bit high pressure values P 2,1 、P 2,2 、…、P 2,n ；
(5) And (3) performing calculation: obtaining an aging value:
in the detection method of the present invention, the temperature T1 in the step (3) is 30 to 900 ℃, preferably 50 to 500 ℃, more preferably 60 to 200 ℃.
The low-oxygen GAS GAS1 is low-oxygen-content GAS, wherein the oxygen content is 10-30% of the oxygen content of the oxygen-enriched GAS in the step (3), and other suitable gases are inert mixed gases or nitrogen; the ventilation amount of the low-oxygen gas is 10-1000 min based on the gas-oil volume ratio -1 Preferably 100 to 500min -1 . Ventilation time t O1 From 0.1 to 10 hours, preferably from 0.1 to 4 hours, more preferably from 0.1 to 1.5 hours.
The frequency of the ultrasonic oscillation is 20-100 kHz, preferably 30-60 kHz; the power applied per unit mass (1 kg) of the material is 0.3 to 1.2kWh, preferably 0.6 to 1kWh.
The temperature T2 in the step (3) is 50-900 ℃, preferably 60-500 ℃, and more preferably 80-250 ℃.
The oxygen-enriched GAS GAS2 is high-oxidability GAS, and comprises inert mixed GAS with the oxygen content of 50-90%, high-purity oxygen, ozone and other gases with strong oxidability. The ventilation amount of the oxygen-enriched gas is 10 to 1000 minutes based on the gas-oil volume ratio -1 Preferably 100 to 500min -1 . Ventilation time t O1 From 0.1 to 10 hours, preferably from 0.1 to 4 hours, more preferably from 0.1 to 1.5 hours.
The temperature T3 in the step (3) is room temperature, and the cooling process is preferably natural cooling.
In the detection method, the calculation result in the step (4) is used as an evaluation index for detecting the stability of the heavy marine blended fuel oil, and the larger the ageing value in the calculation result is, the worse the stability of the blended fuel oil is; the greater average aging rate indicates a faster deposition of the blended fuel oil and a higher degree of instability of the system. The book is provided withThe detection principle of the detection method is that the internal density can change along with the depth change after the oil product is aged, so that the pressure change in different depths in the liquid is caused. The multipoint electronic micro-pressure sensor is arranged in the mixed oil product, when the stability of the oil product is changed due to oxidation, the density in the liquid is changed, the change of the density is related to the depth of the liquid, and r is considered to be the same at the moment Liquid and its preparation method =f(h). Pressure p=r experienced by a sensor in a fixed position Liquid and its preparation method g h=òr Liquid and its preparation method ghdh=ò f(h)ghdhThe main variable affecting the pressure change is the density integral from the liquid surface to the depth h, h is the fixed measurement position of the multipoint electronic micro pressure sensor, so that after the density of the system changes, the pressure measured by the h point changes, and the degree of change can reflect the non-uniformity degree inside the oil product.
In a second aspect, the invention provides a rapid detection apparatus for heavy blended fuel oil.
The device comprises an outer cylinder, an outer cover, an inner cylinder, a gas pipe, a gas distributor, a control device, a thermocouple, a multipoint electronic micro pressure sensor, an ultrasonic generator and a heating device;
the device comprises an outer cylinder, an inner cylinder and a control device;
a control device is arranged outside the outer cylinder; a heating device and an ultrasonic generator are arranged between the outer cylinder and the inner cylinder, the heating device is used for heating the oil product in the inner cylinder, and the ultrasonic generator is used for carrying out ultrasonic treatment on the oil product in the inner cylinder;
the inner cylinder is used for accommodating an oil sample; an electronic micro-pressure sensor, a thermocouple and a gas pipe are arranged in the inner cylinder; the electronic micro-pressure sensor is used for measuring the pressures of different positions of the oil sample and transmitting signals of the pressures to the electronic display; the thermocouple is used for measuring the temperature of the oil to be measured; the gas pipe is used for introducing low-oxygen gas and oxygen-enriched gas into the inner cylinder.
Further, the outer cylinder further comprises an outer cover at the upper part, and the outer cover is used for sealing the upper end of the inner cylinder. The center of the outer cover is provided with a plurality of through holes, and the electronic micro-pressure sensor, the thermocouple and the gas pipe respectively penetrate through the through holes and extend into the inner cylinder. And the electronic micro-pressure sensor, the thermocouple, the gas pipe and the outer cover are sealed. The outer cover is fastened with the outer cylinder in a threaded, fastening or flange mode to achieve sealing.
Further, the heating device, the ultrasonic generator and the thermocouple are respectively connected with the control device. The electronic micro-pressure sensor is communicated with an electronic display of an external control device.
Further, the inner cylinder also comprises a gas distributor, and an outlet at the lower end of the gas pipe penetrates through the gas distributor and is positioned below the gas distributor.
Furthermore, the outer cover is also provided with air-vent holes around the air pipe. The air-vent is used for exhausting the air in the inner cylinder, and the number of the air-vent can be one or a plurality of.
The heating device can adopt a heating mode which is conventional in the field, and can be an electric heating wire or an electric heating rod.
In the invention, the outer cover is fastened with the outer cylinder through threads. The outer cylinder and the outer cover are made of metal or nonmetal compression resistant materials, preferably stainless steel.
The inner cylinder can be made of high temperature resistant materials such as glass, polytetrafluoroethylene and the like. A scale line is arranged above the inner part of the inner cylinder, so that the adding height of the oil product is unified to reach the height; the diameter of the upper edge of the inner cylinder is the same as the outer diameter of the outer cylinder, and the inner cylinder can be hung in the outer cylinder.
In the invention, the gas distributor is of a disc structure and is connected with the inner wall of the inner cylinder, and the gas distributor is provided with a gas column port and a plurality of gas dispersing holes.
In the invention, the multipoint electronic micro pressure sensor is a tubular pressure measuring device, the upper end is arranged above the outer cover and is connected with the electronic display, and the lower end enters the inner cylinder; the shell of the multipoint electronic micro pressure sensor is provided with a plurality of pressure sensitive elements which are distributed on the vertical position and used for monitoring the pressure change of each height point.
In the present invention, the terms "upper" and "lower" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. And the technical term "plurality" refers to two or more, unless explicitly defined otherwise.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts two heating aging processes to realize the whole course simulation of the heavy marine fuel oil in the oil storage cabin, the precipitation cabin (cabinet) and the daily cabin (cabinet). Ultrasonic aging is carried out under the low oxygen atmosphere for the first time, and the complex in the fuel oil is dispersed and refined mainly by ultrasonic, so that the oxidation area is larger under the conditions of low oxygen and medium temperature; and after the second temperature rise, the heavy blended fuel oil is subjected to deep oxidation by utilizing the high oxidation activity in the oxygen-enriched gas at a high temperature, so that the oxidation is more comprehensive.
2. The aging time of the method can be effectively shortened, the shortest aging time can be 1-2 hours, the detection data can be directly obtained after the aging is finished, and the evaluation time is effectively shortened.
3. The aging degree can be directly read and calculated through the pressure change indication, and the property of the oil product at each position is not required to be measured again, so that the measuring step is reduced.
Drawings
FIG. 1 is a schematic diagram of a rapid stability test apparatus for heavy blended fuel oils of the present invention.
The marks in the figure: 1-outer cylinder, 2-outer cover, 3-inner cylinder, 4-gas pipe, 5-gas distributor, 6-control device, 7-thermocouple, 8-multipoint electronic micro pressure sensor, 9-ultrasonic generator, 10-heating device, 401-air vent, 801-electronic display, 802-upper layer pressure sensitive element, 803-middle layer pressure sensitive element, 804-lower layer pressure sensitive element.
FIG. 2 is a schematic view of a gas distributor according to the present invention.
The marks in the figure: 501-gas dispersion disk, 502-gas column port, 503-gas dispersion port.
Detailed Description
The apparatus and method for rapid detection of heavy blended fuel oil of the present invention will be further described with reference to the accompanying drawings, but is not intended to limit the invention thereto.
As shown in fig. 1-2, an apparatus for rapidly detecting the stability of heavy marine fuel oil according to the present invention comprises: the device comprises an outer cylinder 1, an outer cover 2, an inner cylinder 3, a gas pipe 4, a gas distributor 5, a control device 6, a thermocouple 7, a multipoint electronic micro pressure sensor 8, an ultrasonic generator 9 and a heating device 10; a control device 6 is arranged outside the outer cylinder 1; a heating device 10 and an ultrasonic generator 9 are arranged between the outer cylinder 1 and the inner cylinder 3, the heating device 10 is used for heating the oil product in the inner cylinder, and the ultrasonic generator 9 is used for carrying out ultrasonic treatment on the oil product in the inner cylinder; an electronic micro-pressure sensor 8, a thermocouple 7 and a gas pipe 4 are arranged in the inner cylinder 3; the electronic micro-pressure sensor 8 is used for measuring the pressures of different bit heights of the oil sample and transmitting signals thereof to the electronic display; the gas pipe 4 is used for introducing low-oxygen gas and oxygen-enriched gas into the inner cylinder.
The upper part of the outer cylinder 1 is provided with an outer cover 2, and the outer cover 2 is used for sealing the upper end of the inner cylinder 1. The electronic micro-pressure sensor 8, the thermocouple 7 and the gas pipe 4 respectively penetrate through the through holes and extend into the inner cylinder 3. The electronic display of the external control device 6 is communicated with the electronic micro-pressure sensor 8 and is used for displaying data; the control device 6 is connected to the heating device 10, the ultrasonic generator 9 and the thermocouple 7 for operation, respectively.
The inner cylinder 3 further comprises a gas distributor 5, and the outlet at the lower end of the gas pipe 4 penetrates through the gas distributor 5 and is positioned below the gas distributor 5. The outer cover 2 is provided with air-vent holes for exhausting the air in the inner cylinder 3.
In a specific detection device, three pressure sensitive elements are adopted, wherein the height of an inner cylinder 3 is 25cm, the inner diameter is 4cm, and three points with liquid level depths of 3cm, 11cm and 21cm are respectively selected in the vertical direction.
The invention relates to a method for rapidly detecting the stability of heavy marine fuel oil, which comprises the following steps: the heavy blended fuel oil is filled into the inner cylinder 3 to reach scale marks, the gas pipe 4, the multipoint electronic micro pressure sensor 8 and the outer cover 2 are assembled and then covered on the inner cylinder 3, the lower end of the air column of the gas pipe 4 is ensured to be inserted into the air column port of the gas distributor 5, the outer cover and the outer cylinder 1 are sleeved and screwed, the thermocouple 7 is inserted, and the upper end of the air column of the gas pipe 4 is connected with an external air source. Electronic display for recording at this timeThe number P of (2) 0,1 、P 0,2 、P 0,3 The method comprises the steps of carrying out a first treatment on the surface of the Starting a control device 6, setting a temperature T1, starting an ultrasonic generator 9, and introducing low-oxygen GAS GAS1 with a volume flow of s1 to perform first temperature rise aging; let in t 01 After a certain time, the ultrasound generator 9 is turned off, and the reading P is recorded after the reading is stabilized 1,1 、P 1,2 、P 1,3 The method comprises the steps of carrying out a first treatment on the surface of the Setting the temperature T2 for the control device 6, introducing oxygen-enriched GAS GAS2 with the volume flow of s2 for the second time, and introducing T 02 After the time, the temperature is reduced to T3 after ventilation is finished, and the mixture is kept for a period of time to record different high-pressure values P at different positions measured at time T1 2,1 、P 2,2 、P 2,3 The method comprises the steps of carrying out a first treatment on the surface of the The average aging rate and aging value are calculated using a formula.
In order to examine the effect of the detection method in the invention, a heavy marine blended fuel oil commonly used in industry is selected for carrying out the effect experiment. The experimental conditions of examples 1 to 4 are shown in Table 1, and the measurement results are shown in Table 2.
TABLE 1 Experimental conditions
Table 2 evaluation results of examples 1 to 4
TABLE 2 evaluation results of subsequent examples 1-4
From the results shown in Table 2 and Table 2, it can be seen that the apparatus and method of the present invention can measure the stability change of heavy marine blend fuel oil in a short period of time. The greater the aging rate, the faster the aging of the fuel oil under this condition; the larger the ageing value, the poorer the stability of the oil.
Example 5
Three heavy marine blend oils A, B, C were selected and subjected to stability testing according to the conditions of example 2 (scheme 1), with experimental data set forth in tables 3 and 3.
Table 3A, B, C results of testing three blend fuel oils under the conditions of scheme 1 (three test points)
Table 3 results of testing of three blend fuels at scheme 1 (three test points) for A, B, C
From the results in Table 3, it can be seen that A has the worst stability and the fastest aging speed; c has the best stability and slower aging rate.
Example 6
The stability test was performed by selecting heavy marine blended fuel oil A, B, C and performing the conditions of example 2 (scheme 1), wherein 5 electronic micro-pressure sensors were installed in the test apparatus, and five points were selected in the vertical direction, each having a liquid level depth of 3cm, 7.5cm, 12cm, 16.5cm, and 21 cm. The experimental data are presented in tables 4 and 4.
Table 4A, B, C results of testing three blend fuel oils under the conditions of scheme 1 (five test points)
Table 4 results of testing of three blend fuels at scheme 1 (five test points) for A, B, C
The experimental result shows that under the same experimental condition, the stability of A is the worst, and the aging speed is the fastest; c has the best stability and slower aging rate. The experimental results of the five test points are consistent with the experimental results of the three test points. The more test points, the larger the cumulative amount of concentration differences on the gradient, and therefore the larger the calculated value.
Comparative example 1
The three heavy marine blend oils A, B, C were selected, and the stability test was performed by performing the test (scheme 2) and the data processing without introducing an oxidizing gas at room temperature, and the time required to reach the near pressure indication was examined, and the results are shown in tables 5, 5 and 6.
Table 5A, B, C test results for three blend fuel oils under the conditions of scheme 2
Table 5 results of testing of three blend fuels for A, B, C under the conditions of scheme 2
Table 6 results of comparative test
From the results of tables 5-6, it can be seen that the inventive apparatus and method is capable of exhibiting a change in stability of heavy marine blend fuel oils in a short period of time as compared to conventional methods.
Claims (8)
1. A method of detecting blend fuel oil stability comprising:
(1) Providing a container which is a closed cylinder and comprises a feed inlet for adding fuel oil into the cylinder, an air inlet pipeline for introducing oxygen-containing gas into the cylinder, a heating device for heating the cylinder, an ultrasonic disperser for applying ultrasonic action to the fuel oil and an electronic micro-pressure sensor for measuring different high pressures in the cylinder;
(2) The marine fuel oil is injected into the container, and the pressure values P with different bit heights measured at the starting time t0 are recorded 0,1 、P 0,2 、…、P 0,n ；
(3) Controlling the temperature of the fuel oil sample to be T1, introducing low-oxygen GAS GAS1 into the fuel oil sample, and controlling the aeration time to be T 01 The method comprises the steps of carrying out a first treatment on the surface of the Simultaneously starting an ultrasonic generator, dispersing and oxidizing the blended oil, standing for a period of time after the gas is completely introduced, and recording the time t 1 Measured differential bit high pressure value P 1,1 、P 1,2 、…、P 1,n ；
(4) Raising the temperature of the fuel oil sample to T2, introducing oxygen-enriched GAS GAS2 into the fuel oil sample, wherein the aeration time is T 02 The method comprises the steps of carrying out a first treatment on the surface of the After ventilation is finished, the temperature is reduced to T3, and the mixture is kept stand for a period of time to record the time T 1 Measured differential bit high pressure value P 2,1 、P 2,2 、…、P 2,n ；
(5) And (3) performing calculation: obtaining an aging value:
wherein n is a natural number, and n is equal to or greater than 2.
2. The method of claim 1, wherein the temperature T1 is 30 to 900 ℃ and the temperature T2 is 50 to 900 ℃.
3. The method according to claim 1, wherein the oxygen content of the low oxygen GAS1 is 10-30% of the oxygen content of the oxygen enriched GAS in step (4), and the other suitable GAS is an inert mixed GAS or nitrogen.
4. A method according to claim 1 or 3, wherein the low oxygen gas is introduced in an amount of 10 to 1000 minutes in terms of gas-oil volume ratio -1 Ventilation time t 01 0.1 to 10 hours.
5. The method of claim 1, wherein the ultrasonic generator has a frequency of 20 to 100khz and 1kg of material applies a power of 0.3 to 1.2kWh.
6. The method according to claim 1, wherein the oxygen-enriched GAS2 is at least one selected from the group consisting of inert mixed GAS having an oxygen content of 50-90%, high purity oxygen and ozone.
7. The method according to claim 1, wherein the oxygen-enriched gas is introduced in an amount of 10 to 1000 minutes in terms of gas-oil volume ratio -1 Ventilation time t 02 0.1 to 10 hours.
8. The method of claim 1, wherein the temperature T3 is room temperature and the cooling process is natural cooling.
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| DE102005028896C5 (en) * | 2005-06-17 | 2015-06-03 | Anton Paar Provetec Gmbh | Apparatus and method for accelerated oxidation determination of fuels or petroleum products and a computer program for controlling such a device and a corresponding computer-readable storage medium |
| CN202153146U (en) * | 2011-06-28 | 2012-02-29 | 安徽中鼎飞彩车辆有限公司 | Liquid level and density alarming device of hydraulic oil box for engineering machinery |
| CN203929897U (en) * | 2014-05-13 | 2014-11-05 | 西安交通大学 | A kind of experimental provision that accelerates heat ageing for paper oil insulation |
| CN104142285A (en) * | 2014-07-29 | 2014-11-12 | 洛阳乾禾仪器有限公司 | Device for measuring parameters of crude oil inside oil storage tank |
| CN104764678A (en) * | 2015-04-14 | 2015-07-08 | 中国石油大学(华东) | Method for judging storage stability of heavy oil |
| CN106556685B (en) * | 2015-09-24 | 2019-01-25 | 中国石油化工股份有限公司 | A kind of rapid detection method of heavy bunker fuel oil storage stability |
| CN106610419A (en) * | 2015-10-21 | 2017-05-03 | 中国石油化工股份有限公司 | Lubrication oil ageing simulation assessment method |
| CN106501166A (en) * | 2016-11-11 | 2017-03-15 | 佛山科学技术学院 | A kind of method and apparatus of measurement lubricating oil non-oxidizability |
| CN108760569A (en) * | 2018-07-13 | 2018-11-06 | 孙玘凡 | Oil-water mixture density and pure oil flow measuring device and method |
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Effective date of registration: 20231123 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec (Dalian) Petrochemical Research Institute Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: DALIAN RESEARCH INSTITUTE OF PETROLEUM AND PETROCHEMICALS, SINOPEC Corp. |