CN108414400A - The determination method and decision-making system of oil viscosity - Google Patents
The determination method and decision-making system of oil viscosity Download PDFInfo
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- CN108414400A CN108414400A CN201810354739.0A CN201810354739A CN108414400A CN 108414400 A CN108414400 A CN 108414400A CN 201810354739 A CN201810354739 A CN 201810354739A CN 108414400 A CN108414400 A CN 108414400A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
Abstract
The invention discloses a kind of determination method of oil viscosity and decision-making systems, it uses flow, temperature, pressure (or differential pressure) monitoring technology, direct-on-line acquires flow, temperature and the operating pressure of oil product, due to the viscosity and its flow, pressure (or differential pressure), temperature existence function relationship of oil product, by the flow of measurement oil product, pressure (or differential pressure), temperature, can convert to obtain the viscosity number of oil product.Advantage simple with method, highly practical.
Description
Technical field
The present invention relates to the judgement of the viscosity of oil product, it may be applicable to carry out viscosity or mobility monitoring to liquid and judge
Equipment and industry.
Background technology
The viscosity number of oil product especially fuel oil can will be measured just in laboratory conditions at present, and because China is oil starvation
This national national conditions, the fuel oil nature for being applied to burning at present is changeable, and there are no relevant criterion constraints, lead to uncontrollable factor
More, the fuel oil viscosity provided every time for oil man is all uncertain.
Due to extremely sensitive to the viscosity of oil in burning, often generated various because the atomization viscosity of oil is improper
The accident for burning out equipment occurs, and causes largely to lose.
It is generally not providing the solution of oil viscosity in fuel oil equipment, can only be detected by the third party of profession to obtain
Viscosity data.This mode cannot be satisfied the changeable national conditions needs of oil property at all.
Invention content
The object of the present invention is to provide a kind of determination method of oil viscosity and decision-making systems, and method is simple, practicability
By force.
To achieve the goals above, the present invention adopts the following technical scheme that：
The determination method of oil viscosity, is achieved by the steps of：
S1：The flow q of oil product is measured respectivelym, the temperature of oil product and the differential pressure △ p of oil product before and after throttling set, cooperation it is public
The efflux coefficient C that oil product corresponds to throttling set is calculated in formula (1)；
Wherein, β is the aperture ratio of throttling set；ε is expansibility factor, and oil product is incompressible liquid, ε values 1；π
For pi；D is throttling set throat diameter；
S11:Formula (1) is reduced to formula (2)：
Wherein, qmFor the flow of oil product；K is the constant for representing all invariants in formula (1)；△ p is before throttling sets
The differential pressure of oil product afterwards；T refers to the temperature of oil product when measuring；T2 refers to another temperature of oil product；ρt2It refer to oil product at a temperature of t2
Density；α is coefficient；
S12：The restriction relation of the temperature of oil product and the density of oil product is expressed as formula (3)；
ρ 1=ρt2-α(t-t2) (3)
Wherein, t refers to the temperature of oil product when measuring；ρ 1 refers to the density of oil product when measuring；T2 refers to another temperature of oil product
Degree；ρt2The density of oil product when referring to t2 temperature；α is coefficient；
S13：The density p of oil product when measuring t2 temperature respectivelyt2With the density p 1 of oil product when t temperature, formula (3), meter are substituted into
Calculation obtains factor alpha；
S14：By before and after constant K, throttling set when differential pressure △ p of oil product, t2 temperature oil product density pt2, factor alpha and temperature
It spends t2 to substitute into formula (2), passes through the flow q of on-line measurement oil productmWith the temperature t of oil product, the outflow can be calculated
Coefficient C；
S2:Efflux coefficient C obtained by step S1 is calculated by Reed-Harris/Gallacher formula and is flowed through section
Flow the reynolds number Re of the oil product of deviced；
S3:According to reynolds number RedWith dynamic viscosity η1Correspondence, utilize the reynolds number Re obtained by step S2dIt calculates
The dynamic viscosity η of oil product under operating mode1。
In the step S1, the flow q of oil productm, oil product temperature and oil product before and after throttling set differential pressure △ p by
Line mode measurement obtains, and sends measurement result to a control device, and analysis module is provided in this control device, this analysis
Module is preset with parameter conversion analysis software corresponding with formula (1) and Reed-Harris/Gallacher formula, Yi Jiyong respectively
In conversion reynolds number RedWith dynamic viscosity η1Parameter conversion analysis software, pass through this control device analysis calculate oil product power
Viscosities il1。
The output end of the control device is connected with one to show the dynamic viscosity η of oil product1Display device.
The setting range value of the dynamic viscosity of oil product is preset in the analysis module, the output end of the control device connects
It is connected to a warning device, the dynamic viscosity η obtained after the control device, which is analyzed, to be calculated1Beyond this setting value range, then report
Alarm device carries out alarm.
Using the decision-making system of the determination method, including flowmeter, the throttling set in oil pipe, temperature sensing
Device, pressure or differential pressure pick-up and control device；Flowmeter is connected on the oil circuit of oil pipe, the sensing of pressure or differential pressure pick-up
Probe is installed on the front and back position that throttling set is located in oil pipe, and the sensing probe of temperature sensor is installed in oil pipe；
The output end of flowmeter, the output end and pressure of temperature sensor or the output end of differential pressure pick-up are respectively connected to control
The respective input of device is provided with analysis module in this control device, this analysis module is preset with and formula (2) and inner respectively
The corresponding parameter conversion analysis software of moral-Harris/Gallacher formula, and for the reynolds number Re that convertsdWith dynamic viscosity η1
Parameter conversion analysis software, pass through this control device analysis calculate oil product dynamic viscosity η1。
The output end of the control device is connected with one to show the dynamic viscosity η of oil product1Display device.
The setting range value of the dynamic viscosity of oil product is preset in the analysis module, the output end of the control device connects
It is connected to a warning device, the dynamic viscosity η obtained after the control device, which is analyzed, to be calculated1Beyond this setting value range, then report
Alarm device carries out alarm.
After adopting the above technical scheme, the determination method and decision-making system of oil viscosity of the present invention, using flow, temperature,
Pressure (or differential pressure) monitoring technology, can direct-on-line is continuous, collects flow, temperature and the operating pressure of oil product in real time, due to
The viscosity of oil product and its flow, pressure (or differential pressure), temperature existence function relationship, it is (or poor by measuring the flow of oil product, pressure
Pressure), temperature, can convert to obtain the viscosity number of oil product.The advantage that the present invention has method simple, highly practical.
Further, the present invention is provided with display device, can real-time display oil product dynamic viscosity, intuitive and convenient.
Further, the present invention is provided with warning device, can alarm when the dynamic viscosity of oil product is more than setting value
Prompt.
Further, using the judgement of the present invention as a result, the control by control device to the heater of fuel oil equipment, makes
It obtains oil product temperature and is in certain range, the viscosity stabilization to make oil product in a certain range, is operated in avoid burning
Under bad condition.
Description of the drawings
Fig. 1 is the system structure diagram of the present invention；
Fig. 2 is the workflow schematic diagram of the present invention.
Specific implementation mode
In the present invention, the dynamic viscosity η of oil product1Pass through the flow q of oil productm, oil product temperature and throttling set before and after oil product
Differential pressure △ p conversion and obtain.
As a kind of scheme of optimization, referring to Fig. 1 and Fig. 2, the determination method of oil viscosity of the present invention, as follows
It realizes：
S0：Set the structural characteristic parameter of the basic structure size and throttling set of throttling set；
S1：The flow q of on-line measurement oil product respectivelym, the temperature of oil product and the differential pressure △ p of oil product before and after throttling set, match
It closes formula (1) and the efflux coefficient C that oil product corresponds to throttling set is calculated；
Wherein, β is the aperture ratio of throttling set；ε is expansibility factor, and oil product is incompressible liquid, ε values 1；π
For pi；D is throttling set throat diameter；Here ε is definite value 1, and β and d are the basic structure dimensional parameters of throttling set,
When choosing throttling set, β and d are also definite value；
S11:Formula (1) is reduced to formula (2)：
Wherein, qmFor the flow of oil product；K is the constant for representing all invariants in formula (1)；△ p is before throttling sets
The differential pressure of oil product afterwards；T refers to the temperature of oil product when measuring；T2 refers to another temperature of oil product；ρt2It refer to oil product at a temperature of t2
Density；α is coefficient；
S12：The restriction relation of the temperature of oil product and the density of oil product is expressed as formula (3)；
ρ 1=ρt2-α(t-t2) (3)
Wherein, t refers to the temperature of oil product when measuring；ρ 1 refers to the density of oil product when measuring；T2 refers to another temperature of oil product
Degree；ρt2The density of oil product when referring to t2 temperature；α is coefficient；
S13：The density p of oil product when measuring t2 temperature respectivelyt2With the density p 1 of oil product when t temperature, formula (3), meter are substituted into
Calculation obtains factor alpha；
S14：By before and after constant K, throttling set when differential pressure Δ p, t2 temperature of oil product oil product density p t2, factor alpha and temperature
It spends t2 to substitute into formula (2), passes through the flow q of on-line measurement oil productmWith the temperature t of oil product, the outflow can be calculated
Coefficient C；
S2：Efflux coefficient C obtained by step S1 is calculated by Reed-Harris/Gallacher formula and is flowed through throttling
The reynolds number Re of the oil product of deviced；
Reed-Harris/Gallacher formula is as follows：
C=0.5961+0.0261 β2-0.216β8+0.000521(106β/ReD)0.7+(0.0188+0.0063A)β3.5
(106/ReD)0.3+(0.043+0.080e-10L1-0.123e-7L1)(1-0.11A)β4/(1-β4)-0.031(M′2-0.8M′2 1.1)
β1.3
From the link of Chinese flow networkhttp：//www.chinaflow.com.cn/basic/chayal1-9.htmIt can see
Go out, in Reed-Harris/Gallacher formula, in addition to Reynolds number ReDIn addition, remaining each parameter has with the structure of throttling set
It closes, when choosing throttling set, these parameters are definite value.Reed-Harris/Gallacher formula is formula well known in the art,
Herein with regard to not carrying out expansion explanation to each parameter of Reed-Harris/Gallacher formula.Some explanation is only supplemented herein, that is,
Reed-Harris/Gallacher formula, ReDFor Reynolds number related with D, in of the invention, D corresponding is throttling set throat diameter
D, Reynolds number are then correspondingly expressed as Red；
S3：According to reynolds number RedWith dynamic viscosity η1Correspondence, utilize the reynolds number Re obtained by step S2dIt calculates
The dynamic viscosity η of oil product under operating mode1；Reynolds number RedWith dynamic viscosity η1Correspondence meet formula (4)：
Red=4qm/ (π η1d) (4)
Wherein, d is throttling set throat diameter；qmFor the flow of oil product；π is pi.
π is definite value, and when choosing throttling set, d is also definite value, the reynolds number Re as obtained by step S2d, coordinate online survey
The flow q of the oil product of amountm, you can conversion obtains the dynamic viscosity η of oil product under operating mode1。
When work, the flow q of oil productm, the temperature of oil product and the differential pressure Δ p of oil product before and after throttling set pass through online mode
Measurement obtains, and sends measurement result to a control device, and analysis module is provided in this control device, this analysis module point
Be not preset with formula (1), Reed-Harris/Gallacher formula and formula (4) corresponding parameter conversion analysis software, pass through
The analysis of this control device calculates the dynamic viscosity η of oil product1。
In the present invention, using the decision-making system of the determination method, including positive displacement oil flowmeter 1, in oil pipe 3
Throttling set 2, control device 4, pressure or differential pressure pick-up 5 and temperature sensor 6；Positive displacement oil flowmeter 1 is connected to oil pipe 3
Oil circuit on, the sensing probe of pressure or differential pressure pick-up 5 is installed on the front and back position that throttling set 2 is located in oil pipe 3,
The sensing probe of temperature sensor 6 is installed in oil pipe 3；The output end of positive displacement oil flowmeter 1, the output of temperature sensor 6
End and the output end of pressure or differential pressure pick-up 5 are respectively connected to the respective input of control device 4, in this control device 4
It is provided with analysis module, this analysis module is preset with and formula (2), Reed-Harris/Gallacher formula and formula (4) respectively
Corresponding parameter conversion analysis software, the dynamic viscosity η for calculating oil product is analyzed by this control device 41。
The determination method and decision-making system of oil viscosity of the present invention monitor skill using flow, temperature, pressure (or differential pressure)
Art, can direct-on-line collect flow, temperature and the operating pressure of oil product, since viscosity and its flow of oil product, pressure are (or poor
Pressure), temperature existence function relationship can convert to obtain the viscous of oil product by measuring the flow of oil product, pressure (or differential pressure), temperature
Angle value.
In the present invention, the output end of control device 4 can be connected with one to show the dynamic viscosity η of oil product1Display dress
Set, can real-time display oil product dynamic viscosity, intuitive and convenient.
In the present invention, the setting range value of the dynamic viscosity of oil product can be preset in the analysis module of control device 4, controlled
The output end of device 4 is connected with a warning device, the dynamic viscosity η obtained after control device 4, which is analyzed, to be calculated1Beyond this setting
Value range, then warning device carry out alarm.
Further, using the judgement of the present invention as a result, controlled the heater of fuel oil equipment by control device,
Oil product temperature may make to be in certain range, so as to make the viscosity stabilization of oil product in a certain range, to avoid burning
It is operated under bad condition.
In the present invention, for the throttling set of specific structure, corresponding efflux coefficient C is a definite value, for same
If after a kind of oil product carried out calibration, the variation of C values is it is considered that known.After the oil product renewed, C values change,
The dynamic viscosity of new oil product can be obtained by this variation comparison.Based on this principle, in the mentality of designing of the present invention
The dynamic viscosity of oil product also protection category of the invention is obtained under guidance in such a way that same operating mode compares.By same
The mode of operating mode comparison can simplify calculating to obtain the dynamic viscosity of oil product, while improve the accuracy of calculating.
Claims (6)
1. the determination method of oil viscosity, which is characterized in that be achieved by the steps of：
S1：The flow q of oil product is measured respectivelym, the temperature of oil product and the differential pressure △ p of oil product before and after throttling set, cooperation formula (1)
The efflux coefficient C that oil product corresponds to throttling set is calculated；
Wherein, β is the aperture ratio of throttling set；ε is expansibility factor, and oil product is incompressible liquid, ε values 1；π is circle
Frequency；D is throttling set throat diameter；
S11:Formula (1) is reduced to formula (2)：
Wherein, qmFor the flow of oil product；K is the constant for representing all invariants in formula (1)；△ p are oil product before and after throttling set
Differential pressure；T refers to the temperature of oil product when measuring；T2 refers to another temperature of oil product；ρt2Refer to the density of oil product at a temperature of t2；α
It is coefficient；
S12：The restriction relation of the temperature of oil product and the density of oil product is expressed as formula (3)；
ρ 1=ρt2-α(t-t2) (3)
Wherein, t refers to the temperature of oil product when measuring；ρ 1 refers to the density of oil product when measuring；T2 refers to another temperature of oil product；ρt2
The density of oil product when referring to t2 temperature；α is coefficient；
S13：The density p of oil product when measuring t2 temperature respectivelyt2With the density p 1 of oil product when t temperature, formula (3) is substituted into, is calculated
To factor alpha；
S14：By before and after constant K, throttling set when differential pressure △ p of oil product, t2 temperature oil product density pt2, factor alpha and temperature t2
It substitutes into formula (2), passes through the flow q of on-line measurement oil productmWith the temperature t of oil product, the efflux coefficient can be calculated
C；
S2:Efflux coefficient C obtained by step S1 is calculated by Reed-Harris/Gallacher formula and is flowed through throttling dress
The reynolds number Re for the oil product setd；
S3:According to reynolds number RedWith dynamic viscosity η1Correspondence, utilize the reynolds number Re obtained by step S2dCalculate operating mode
The dynamic viscosity η of lower oil product1。
In the step S1, the flow q of oil productm, oil product temperature and oil product before and after throttling set differential pressure △ p by online
Mode measurement obtains, and sends measurement result to a control device, and analysis module is provided in this control device, this analysis mould
Block is preset with parameter conversion analysis software corresponding with formula (1) and Reed-Harris/Gallacher formula respectively, and is used for
Convert reynolds number RedWith dynamic viscosity η1Parameter conversion analysis software, analyzed by this control device calculate oil product power it is viscous
Spend η1。
2. the determination method of oil viscosity according to claim 1, it is characterised in that：The output end of the control device connects
One is connected to show the dynamic viscosity η of oil product1Display device.
3. the determination method of oil viscosity according to claim 1, it is characterised in that：Oil is preset in the analysis module
The output end of the setting range value of the dynamic viscosity of product, the control device is connected with a warning device, when the control device
The dynamic viscosity η that analysis obtains after calculating1Value range is set beyond this, then warning device carries out alarm.
4. the decision-making system of application determination method described in claim 1, it is characterised in that：Including flowmeter, it is set in oil pipe
Throttling set, temperature sensor, pressure or differential pressure pick-up and control device；Flowmeter is connected on the oil circuit of oil pipe, pressure
The sensing probe of power or differential pressure pick-up is installed on the front and back position that throttling set is located in oil pipe, the biography of temperature sensor
Sense probe is installed in oil pipe；The output end of flowmeter, the output end and pressure of temperature sensor or differential pressure pick-up it is defeated
Outlet is respectively connected to the respective input of control device, and analysis module is provided in this control device, this analysis module difference
It is preset with parameter conversion analysis software corresponding with formula (2) and Reed-Harris/Gallacher formula, and for the thunder that converts
Promise number RedWith dynamic viscosity η1Parameter conversion analysis software, pass through this control device analysis calculate oil product dynamic viscosity η1。
5. decision-making system according to claim 4, it is characterised in that：The output end of the control device be connected with one to
Show the dynamic viscosity η of oil product1Display device.
6. decision-making system according to claim 4, it is characterised in that：The power that oil product is preset in the analysis module is viscous
The output end of the setting range value of degree, the control device is connected with a warning device, after the control device, which is analyzed, to be calculated
Obtained dynamic viscosity η1Value range is set beyond this, then warning device carries out alarm.
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Cited By (1)
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| CN110161219A (en) * | 2019-05-31 | 2019-08-23 | 中冶建工集团有限公司 | Judge the method and device of grouting material fluidity |
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