On-line measurement method and measurement device for viscosity of hydrocarbon fuel high temperature and high pressure cracking products

A hydrocarbon fuel and cracking product technology, applied in the field of viscosity measurement method and supporting measuring device of hydrocarbon fuel cracking product

Inactive Publication Date: 2016-08-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no method that can realize the online measurement of the viscosity of the flowing gas during the cracking reaction of hydrocarbon fuels.

Method used

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  • On-line measurement method and measurement device for viscosity of hydrocarbon fuel high temperature and high pressure cracking products
  • On-line measurement method and measurement device for viscosity of hydrocarbon fuel high temperature and high pressure cracking products
  • On-line measurement method and measurement device for viscosity of hydrocarbon fuel high temperature and high pressure cracking products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this embodiment, the structure of the on-line measurement device for the viscosity of the high-temperature and high-pressure cracking product of the hydrocarbon fuel is as follows: figure 1 As shown, it includes an oil storage tank 1, a high-pressure constant-flow pump 2, a mass flow meter 4, a heating pipe 5, a pressure gauge 11, a viscosity measuring pipe 8, an orifice plate pressure collector 10 equipped with a second differential pressure transmitter 12, A condenser 13 and a back pressure valve 14; the liquid inlet end of the high-pressure constant-flow pump 2 is connected to the oil storage tank 1 through a pipe fitting, and the liquid outlet end of the high-pressure constant-flow pump 2 is connected to the liquid inlet of the mass flow meter 4 through a pipe fitting , a check valve 3 that prevents the hydrocarbon fuel from flowing back to the high-pressure constant-flow pump is arranged on the pipe fitting connecting the outlet end of the high-pressure constant-...

Embodiment 2

[0057] In this embodiment, the flow field coefficient A of the capillary is calibrated, and the steps are as follows:

[0058] Calibrate with nitrogen with a purity of 99.99%, look up the viscosity and density of nitrogen in the table, pass nitrogen into the online measuring device with the structure described in Example 1, adjust different temperatures, and measure the mass flow Q of nitrogen m and the differential pressure Δp at both ends of the viscosity measuring tube 8 at different temperatures, the viscosity, density and mass flow Q of the measured nitrogen gas m , differential pressure Δp into the following formula:

[0059] Calculate the value of A, and the calculation results are shown in Table 1. Take the average of multiple measurements It is used to measure the viscosity of aviation kerosene pyrolysis products under high temperature and high pressure.

[0060] Table 1 Calibration of thin tube flow field coefficient A

[0061]

[0062] Note: 1. In the onli...

Embodiment 3

[0065] In this example, the measuring device with the structure described in Example 1 and the capillary flow field coefficient calibrated in Example 2 are used to measure the viscosity of aviation kerosene high-temperature and high-pressure cracking products online.

[0066] Hydrocarbon fuel: aviation kerosene;

[0067] mass flow Q m : 1g / s;

[0068] Cracking pressure p: 1.0MPa;

[0069] Viscosity measurement tube inner diameter: 2mm; length: 20cm;

[0070] Inner diameter of heating tube: 2mm, length: 100cm;

[0071] Cracking temperature: see Table 2.

[0072] The specific operation steps are as follows:

[0073] ① Turn on the high-pressure constant-flow pump 2, so that the hydrocarbon fuel to be measured enters the heating tube 5 according to the set mass flow rate, and uses the mass flow meter 4 to measure the mass flow rate Q of the hydrocarbon fuel m ;

[0074] ② Turn on the AC power supply 6 of the heating tube 5, adjust the cracking temperature and cracking press...

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Abstract

The on-line measurement device for the viscosity of hydrocarbon fuel high temperature and high pressure cracking products includes oil storage tank, high pressure constant flow pump mass flow meter, heating tube, viscosity measurement tube, density tester, condenser and back pressure valve. On-line measurement method for the viscosity of hydrocarbon fuel high temperature and high pressure cracking products, using the viscosity expression based on the flow state and turbulent flow conditions Use the above device to measure, in the viscosity expression, Δp is the differential pressure value at both ends of the viscosity measuring tube collected online, Q m is the mass flow rate of the hydrocarbon fuel collected online, ρ is the density of the cracking product of the hydrocarbon fuel, and A is the thin tube flow field coefficient, which is obtained by calibration with a standard gas of known viscosity. By using the measuring method and matching measuring device of the present invention, the adverse effects of high-temperature coking on pipelines during the hydrocarbon fuel cracking process are avoided, and the on-line determination of the viscosity of the high-temperature and high-pressure cracking products of the hydrocarbon fuel can be safely realized.

Description

technical field [0001] The invention belongs to the technical field of engineering thermophysics and fuel physical property testing, and in particular relates to a method for measuring the viscosity of hydrocarbon fuel cracking products and a matching measuring device. Background technique [0002] Scramjet technology requires a certain flow of hydrocarbon fuel to be heated in a small-diameter cooling channel and undergo phase change and cracking reactions to absorb the heat of the engine combustion chamber to cool the engine. The inner diameter of the cooling channel is generally below 3mm. The phase change and reaction of fuel molecules at high temperature, the phase state, components, molecular weight, density and viscosity of the system are constantly changing, and because the cracking reaction of hydrocarbon fuel is an endothermic reaction, it is difficult to achieve chemical equilibrium, so the density of the system , viscosity and flow rate are also affected by heatin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/04
Inventor 张其翼李象远朱权王健礼陈玉
Owner SICHUAN UNIV
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