Online analysis method and device for lubricating oil pour point
A lubricating oil, a technology to be analyzed, applied in the direction of measuring devices, analyzing materials, flow characteristics, etc., can solve problems such as poor repeatability and poor linearity
Inactive Publication Date: 2014-05-21
TIANJIN KELIDA INDAL INSTR TECH
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Problems solved by technology
[0051] According to the characteristics of high viscosity of lubricating oil, the present invention proposes a new method and device for online analysis of its pour point, which mainly solves the problems of poor repeatability and worse linearity of current online analyzers at home and abroad
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[0078] 1. Structural composition
[0079] See Figure 4 :
[0080] 401 liquid expansion probe; 402 turbine; 403 worm; 404 bearing; 405 bearing seat; 406 stepper motor; 407 upper oil circuit board; Water tank; 412 Cooling water tank; 413 Semi-conductor cooling component; 414 Semiconductor cooling component; 415 Lower heat insulation tube; 416 Lower oil circuit board; 417 Solenoid valve for oil sample inlet; ; 421 compression flange; 422 temperature measuring platinum resistance; 423 single chip computer; 424 analysis chamber; 425 oil sample to be analyzed; 426 signal line; 427 signal line.
[0081] 2. Working process
[0082] 1. Start the stepping motor 406, drive the worm 403 and the turbine 402, and screw the probe 401 into a specific position in the analysis chamber;
[0083] 2. Open the oil sample inlet solenoid valve 417, introduce new oil sample 425 to replace the old oil sample 425 and discharge it from the oil sample replacement overflow outlet 409, and close the so...
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Abstract
The invention discloses an online analysis method and an online analysis device for a lubricating oil pour point, and relates to the technical field of online analysis of product quality of petrochemical oil refining production processes. A step motor 406, a worm 403, a worm wheel 402 and an expanded liquid probe 401 are controlled by a singlechip 423 and periodically move up and down, and an oil sample 425 in an analysis cavity 424 is reduced and expanded together with the up-and-down movement; and the singlechip 423 and a sensor 419 monitor the pressure change. At the beginning, the mobility of the oil sample is good, the pressure change is transferred to the sensor 419 without attenuation, and equal amplitude square wave is formed through time. During cooling, the viscous resistance of the oil sample is gradually increased, the pressure change is attenuated, the square wave is gradually changed into triangular wave, and the amplitude of the triangular wave gradually tends to zero. The singlechip 423 measures the pour point of the oil sample through a platinum resistor 422 according to the rear edge locus of the triangular wave and the pressure value. A signal detector and the probe 401 move synchronously to shield phase errors. The pressure transfer is only related with the final viscous resistance of the oil sample, and random error items are shielded.
Description
Technical field: [0001] A method for on-line monitoring of product quality in the production process of a petrochemical company's refinery, especially relates to a method and device for on-line analysis of the pour point of high-viscosity oil products and lubricating oil. Background technique [0002] With the development of modern industry and the requirement of environmental protection, especially the automobile industry, the quality of lubricating oil is put forward higher and higher requirements. The international market mainstream of lubricating oil is developing in the direction of high viscosity index, high oxidation stability, low viscosity, low volatility, low sulfur content and low pour point. The pour point of lubricating oil is an important quality index indicating the low temperature characteristics of lubricating oil. [0003] Lubricating oil is blended from base oil and additives, of which base oil accounts for 85%-95%. Refined (or hydrotreated), ketone-benz...
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IPC IPC(8): G01N33/30G01N33/28G01N11/14
Inventor 朱德祥
Owner TIANJIN KELIDA INDAL INSTR TECH