CN101520424A - Temperature flow-type steam quality measurement device and measurement method - Google Patents
Temperature flow-type steam quality measurement device and measurement method Download PDFInfo
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- CN101520424A CN101520424A CN200810017545A CN200810017545A CN101520424A CN 101520424 A CN101520424 A CN 101520424A CN 200810017545 A CN200810017545 A CN 200810017545A CN 200810017545 A CN200810017545 A CN 200810017545A CN 101520424 A CN101520424 A CN 101520424A
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Abstract
The invention discloses a temperature flow-type steam quality measurement device and a measurement method thereof, comprising a temperature sensor, a flowmeter, a heat transfer rod, a thermal sleeve and a steam quality processor. The heat transfer rod (4) is installed on the wall of a steam pipe (10); a steam temperature sensor (1) and a target-type flowmeter (5) are respectively arranged at the two sides of the heat transfer rod; and the outer surface of the heat transfer rod (4) is sleeved with a thermal sleeve (7). A hot end temperature sensor (8) is internally embedded at the hot end of the heat transfer rod (4), and the hot end directly contacts with the steam in the steam pipe; a cold end temperature sensor (3) is internally embedded at the cold end of the heat transfer rod (4), and the cold side is fixed with a cooling fin (2) and contacts with the ambient air. The invention derives the steam flow in the steam pipe according to the steam temperature in the steam pipe, the hot end temperature of the heat transfer rod, and the cold end temperature of the heat transfer rod, and then combines the steam flow in the steam pipe with the steam flow which is measured by the target-type flowmeter, and finally calculates the wet steam quality in the steam pipe. The invention has the advantages of high measurement accuracy, and good stability and reliability.
Description
One, affiliated technical field
What the present invention relates to is steam physical property technical field of measuring, is a kind of temperature flow-type steam quality measurement device and measuring method.
Two, background technology
Steam quality is the important quality parameter of steam, contains gas phase steam and the liquid phase mixtures of liquids is called wet steam, also is called saturated vapour, and wherein the ratio of the quality of gas phase steam and wet steam gross mass is defined as steam quality.Be used for the thermal recovery technology of oil exploitation process, to the economy important influence of its mass dryness fraction of water vapor to recovering the oil of oil well injection.In industry such as chemical industry, food processing, pharmacy, the water vapor mass dryness fraction is very important important physical character equally, and needs Detection ﹠ Controling water vapor mass dryness fraction continuously.
Application number is 8105217.5 patent of invention, the measuring method of a kind of vapour (gas) liquid two-phase flow and mass dryness fraction is disclosed, the technical characterictic of this method is: according to the pulse characteristic of wet steam, a restriction device is installed on jet chimney, by gathering all pulsation of pressure reduction of average pressure reduction peace of energy saver both sides, extrapolate steam quality.Yet the method for this measurement steam quality is pure experimental technique, needs through a large amount of experiments, determine the funtcional relationship between pulsation of average pressure reduction and average pressure reduction and the steam quality, and this funtcional relationship also lacks sufficient theoretical foundation, so its measuring accuracy is difficult to guarantee.
Application number is 02232815.7 utility model patent, a kind of two-parameter measurement device that measures saturated vapor dryness and flow is disclosed, the technical characterictic of this device is: orifice flowmeter and pressure gauge are installed on jet chimney, gather the front and back fluid differential pressure signal and the manometric pressure signal of orifice flowmeter, according to orifice plate differential pressure noise model, extrapolate the steam quality of jet chimney.Yet the method for this measurement steam quality also is pure experimental technique, needs to determine the funtcional relationship between orifice plate differential pressure noise and the steam quality through a large amount of experiments, promptly needs to set up orifice plate differential pressure noise model accurately.Because the monotonic functional relationship between orifice plate differential pressure noise and the steam quality, also do not obtain abundant support theoretical and experiment, moreover, this measurement mechanism also is subjected to the influence of environmental noise of use occasion, so, the measuring accuracy of this measuring method and measurement mechanism is difficult to guarantee that its engineering practicability also is difficult to effective assurance.
Application number is 200710055286.3 patent of invention, a kind of association type wet steam flow, dryness measurement device and measuring method thereof are disclosed, the technical characterictic of this method is: orifice flowmeter and Venturi tube flowmeter are installed in series on jet chimney, by gathering the front and back fluid pressure difference of these two kinds of flowmeters respectively, when the known steam mass dryness fraction, just can draw the steam flow of jet chimney by the flow formula of orifice flowmeter or Venturi tube flowmeter; When steam quality is unknown variable, according to the principle of mass conservation of series pipe, the flow formula simultaneous of these two kinds of flowmeters is got up, find the solution the steam quality that draws in the jet chimney.Yet, the measuring method of this steam quality, related orifice flowmeter and Venturi tube flowmeter, its flow measurement principle all is by gathering the front and back fluid pressure difference of flowmeter, extrapolate the steam flow of jet chimney, the flow measurement principle that is to say these two kinds of flowmeters is identical, be the pressure reduction type flowmeter that belongs to a kind of in theory, thereby its flow formula has similarity.In the flow formula of these two flowmeters of the same race of simultaneous solution, its steam quality can be disappeared automatically, thereby causes drawing the steam quality as unknown variable.Though this patent of invention has been introduced " two-phase slip factor " parameter in the flow formula of these two kinds of flowmeters, flow formula to these two kinds of flowmeters is out of shape, make these two kinds of flow formulas different in form, but do not change the similarity of these two kinds of its flow formulas of flowmeter in essence, so, from measuring principle as can be known, the measuring method of this steam quality can not have high measuring accuracy, and its measurement stability can be not fine yet.
In order to utilize the flowmeter survey steam quality, and overcome the deficiency of above-mentioned three kinds of steam quality measuring methods and measurement mechanism, need set up a kind of novel reliable and stable and steam quality measuring method that measuring accuracy is higher.
Three, summary of the invention
For overcoming the deficiency of prior art steam quality measuring method and measurement mechanism, the present invention proposes a kind of temperature flow-type steam quality measurement device and measuring method.
The present invention includes vapor (steam) temperature sensor, flowmeter, heat conductive bar, thermal sleeve, heat radiator and steam quality processor, wherein, the two ends of heat conductive bar are respectively hot junction and cold junction, and are embedded with temperature sensor respectively at two ends; Thermal sleeve is sleeved on the heat conductive bar, and closely fixedlys connected with heat conductive bar, and its length is less than or equal to heat conductive bar length; On the jet chimney wall, open the diameter hole identical, thermal sleeve closely is fixed in this hole, and keep thermal sleeve hot junction wall concordant with the jet chimney internal face with the thermal sleeve overall diameter.The cold junction wall of the heat conductive bar after the assembling is closely fixedlyed connected with heat radiator, and hot junction wet steam direct and in the jet chimney contacts.The vapor (steam) temperature sensor is installed on the jet chimney, and the vapor (steam) temperature in the measuring channel is installed in target type meter on the jet chimney, the steam flow in the measuring channel; Vapor (steam) temperature sensor and target type meter lay respectively at the both sides of heat conductive bar, and it is apart from the jet chimney internal diameter that keeps greater than 3 times.The steam quality processor communicates to connect with vapor (steam) temperature sensor, heat conductive bar hot-side temperature sensor, heat conductive bar cold junction temperature sensor, target type meter respectively.
The invention allows for a kind of steam quality measuring method, detailed process is:
The first step, steam quality processor are gathered the vapor (steam) temperature T that the vapor (steam) temperature sensor is surveyed
1, the steam quality processor is gathered the heat conductive bar hot-side temperature T that heat conductive bar hot-side temperature sensor is surveyed
2, the heat conductive bar cold junction temperature T that surveyed of heat conductive bar cold junction temperature sensor
3, determine steam mass flow G undetermined in the jet chimney by following formula
In [1] formula, π is a circular constant, and D is the interior diameter of jet chimney, and μ is the dynamic viscosity coefficient of wet steam, λ
1Be the coefficient of heat conductivity of heat conductive bar, F
1Be the cross-sectional area of heat conductive bar, L is the length between the cold and hot end temperature sensor of heat conductive bar hot-side temperature sensor and heat conductive bar, F
2Be the surface area that the heat conductive bar hot junction contacts with steam, λ
2Be the coefficient of heat conductivity of wet steam, Pr is the Prandtl number of wet steam, and A, m and n are the flow calibration coefficient.
Second step, steam quality processor are gathered the steam impringement power f of target type meter target plate, and determine steam mass flow G undetermined in the jet chimney by following formula
In [2] formula, B is the coefficient of flow that target type meter is demarcated, and D is the interior diameter of jet chimney, and d is the target plate diameter of target type meter, and ρ is a wet steam density.
The 3rd step, steam quality processor are again by built-in wet steam rerum natura relational expression
μ＝μ(T
1，X) [3]
λ
2＝λ
2(T
1，X) [4]
Pr＝Pr(T
1，X) [5]
ρ＝ρ(T
1，X) [6]
Steam quality processor simultaneous solution above-mentioned [1]-[6] formula has just drawn dryness of wet steam X to be asked.
Temperature flow-type steam quality measuring method of the present invention integrates vapor (steam) temperature sensor (1), heat conductive bar hot-side temperature sensor (8), heat conductive bar cold junction temperature sensor (3) and target type meter (5), measures the dryness of wet steam in the jet chimney.Wherein, heat conductive bar (4) is a metal bar and by thermal sleeve (7) parcel, and the heat conductive bar hot junction directly contacts with wet steam, and heat conductive bar cold junction and heat radiator (2) are fixed and joined with surrounding air.Vapor (steam) temperature in the vapor (steam) temperature sensor measurement jet chimney, heat conductive bar hot-side temperature sensor measurement heat conductive bar hot-side temperature, heat conductive bar cold junction temperature sensor measurement heat conductive bar cold junction temperature, and by the steam flow in these three temperature derivation jet chimneys, the steam flow simultaneous of surveying with target type meter is extrapolated the dryness of wet steam in the jet chimney again.The present invention has measuring accuracy height, reliable and stable characteristics.
Four, description of drawings:
Fig. 1 is the synoptic diagram that the temperature flow-type steam quality measuring method is used, wherein
1-vapor (steam) temperature sensor 2-heat radiator 3-cold junction temperature sensor 4-heat conductive bar 5-target type meter
6-steam quality processor 7-thermal sleeve 8-hot-side temperature sensor 9-steam pipeline heat-insulation layer 10-jet chimney.
Five, embodiment:
Embodiment one
Present embodiment is the application of temperature flow-type steam quality measuring method, measures the dryness of wet steam in the jet chimney.
Present embodiment comprises vapor (steam) temperature sensor 1, heat radiator 2, heat conductive bar cold junction temperature sensor 3, heat conductive bar 4, target type meter 5, steam quality processor 6, thermal sleeve 7, heat conductive bar hot-side temperature sensor 8, steam pipeline heat-insulation layer 9 and jet chimney 10.Wherein: heat conductive bar 4 is the copper metal bar of 50mm for diameter 5mm length, and be expanded perlite thermal sleeve 7 parcel of 48mm thickness 6mm by length, the hot junction of heat conductive bar 4 steam direct and that jet chimney is interior contacts, and the copper metal circular heat radiator 2 of the cold junction of heat conductive bar 4 and diameter 50mm is fixed and joined with surrounding air.In the hot junction of heat conductive bar 4, be embedded with hot-side temperature sensor 8, at the cold junction of heat conductive bar, be embedded with cold junction temperature sensor 3.
Vapor (steam) temperature sensor 1 is installed on the jet chimney 10 that internal diameter is 100mm, and energy measurement goes out near the vapor (steam) temperature of the main flow area in jet chimney center.On the tube wall of jet chimney 10, open a diameter and the identical hole of thermal sleeve 7 overall diameters, thermal sleeve closely is fixed in this hole, and keep thermal sleeve hot junction wall concordant with the jet chimney internal face.Target type meter 5 is installed on the jet chimney 10, and makes the target plate of target type meter be near the main flow area in jet chimney center.Vapor (steam) temperature sensor and target type meter lay respectively at the both sides of heat conductive bar, and its distance is 500mm.The steam quality processor communicates to connect with vapor (steam) temperature sensor, heat conductive bar hot-side temperature sensor, heat conductive bar cold junction temperature sensor, target type meter respectively.
When measuring steam quality, detailed process is:
The first step, steam quality processor 6 are gathered the vapor (steam) temperature T that vapor (steam) temperature sensor 1 is surveyed
1, steam quality processor 6 is gathered the heat conductive bar hot-side temperature T that heat conductive bar hot-side temperature sensor 8 is surveyed
2, the heat conductive bar cold junction temperature T that surveyed of heat conductive bar cold junction temperature sensor 3
3, determine steam mass flow G undetermined in the jet chimney by following formula
In [1a] formula, π is a circular constant, and D is the interior diameter of jet chimney 9, and μ is the dynamic viscosity coefficient of wet steam, λ
1Be the coefficient of heat conductivity of heat conductive bar 4, F
1Be the cross-sectional area of heat conductive bar 4, L is the hot-side temperature sensor 7 of heat conductive bar 4 and the length between the cold and hot end temperature sensor 3, F
2Be the surface area that the heat conductive bar hot junction contacts with steam, λ
2Be the coefficient of heat conductivity of wet steam, Pr is the Prandtl number of wet steam, and A, m and n are the flow calibration coefficient.
Second step, steam quality processor 6 are gathered the steam impringement power f of target type meters 5 target plates, and determine steam mass flow G undetermined in the jet chimney by following formula
In [2a] formula, B is the coefficient of flow that target type meter 5 is demarcated, and D is the interior diameter of jet chimney 9, and d is the target plate diameter of target type meter 5, and ρ is a wet steam density.
The 3rd step, steam quality processor 6 are again by built-in wet steam rerum natura relational expression
μ＝μ(T
1，X) [3a]
λ
2＝λ
2(T
1，X) [4a]
Pr＝Pr(T
1，X) [5a]
ρ＝ρ(T
1，X) [6a]
Steam quality processor 6 simultaneous solutions above-mentioned [1a]-[6a] formula has just drawn dryness of wet steam X to be asked.
Claims (2)
1. temperature flow-type steam quality measurement device, comprise temperature sensor, flowmeter, it is characterized in that also comprising heat conductive bar (4), thermal sleeve (7), steam quality processor (6), and heat conductive bar (4) is positioned on the tube wall of jet chimney (10), vapor (steam) temperature sensor (1) and target type meter (5) lay respectively at the both sides of heat conductive bar (4), and it is apart from the jet chimney internal diameter that keeps greater than 3 times; The outside surface of heat conductive bar (4) is wrapped up by thermal sleeve (7); Be embedded with hot-side temperature sensor (8) in the hot junction of heat conductive bar (4), and should contact by end steam direct and in the jet chimney; Cold junction is embedded with cold junction temperature sensor (3), and this end and heat radiator (2) are fixing and join with surrounding air; Steam quality processor (6) communicates to connect with vapor (steam) temperature sensor (1), heat conductive bar hot-side temperature sensor (8), heat conductive bar cold junction temperature sensor (3), target type meter (5) respectively.
2. method of utilizing the described temperature flow-type steam quality measurement device of claim 1 to measure steam quality is characterized in that:
A. the steam quality processor is gathered the vapor (steam) temperature T that the vapor (steam) temperature sensor is surveyed
1, the steam quality processor is gathered the heat conductive bar hot-side temperature T that heat conductive bar hot-side temperature sensor is surveyed
2, the heat conductive bar cold junction temperature T that surveyed of heat conductive bar cold junction temperature sensor
3, determine steam mass flow G undetermined in the jet chimney by following formula
In the formula, π is a circular constant, and D is the interior diameter of jet chimney, and μ is the dynamic viscosity coefficient of wet steam, λ
1Be the coefficient of heat conductivity of heat conductive bar, F
1Be the cross-sectional area of heat conductive bar, L is the length between the cold and hot end temperature sensor of heat conductive bar hot-side temperature sensor and heat conductive bar, F
2Be the surface area that the heat conductive bar hot junction contacts with steam, λ
2Be the coefficient of heat conductivity of wet steam, Pr is the Prandtl number of wet steam, and A, m and n are the flow calibration coefficient;
B. the steam quality processor is gathered the steam impringement power f of target type meter target plate, and determines steam mass flow G undetermined in the jet chimney by following formula
In the formula, B is the coefficient of flow that target type meter is demarcated, and D is the interior diameter of jet chimney, and d is the target plate diameter of target type meter, and ρ is a wet steam density;
C. the steam quality processor is again by built-in wet steam rerum natura relational expression
μ＝μ(T
1，X) [3]
λ
2＝λ
2(T
1，X) [4]
Pr＝Pr(T
1，X) [5]
ρ＝ρ(T
1，X) [6]
Steam quality processor simultaneous solution above-mentioned [1]-[6] formula has just drawn dryness of wet steam X to be asked.
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|---|---|---|---|
| CN2008100175458A CN101520424B (en) | 2008-02-25 | 2008-02-25 | Temperature flow-type steam quality measurement device and measurement method |
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|---|---|---|---|
| CN2008100175458A CN101520424B (en) | 2008-02-25 | 2008-02-25 | Temperature flow-type steam quality measurement device and measurement method |
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| CN101520424B CN101520424B (en) | 2012-05-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353412A (en) * | 2011-07-08 | 2012-02-15 | 中国计量科学研究院 | Wet saturated vapor dryness and flow integral measurement device and measurement method |
| CN103134834A (en) * | 2013-01-30 | 2013-06-05 | 东南大学 | Device and method for measuring dryness of wet steam |
| CN103185735A (en) * | 2013-03-08 | 2013-07-03 | 杨善让 | Soft measurement method based on variable-boundary segmentation energy balance, multifunctional wet steam measuring needle and wet steam heat absorption measurement and control device |
| CN105572168A (en) * | 2015-12-15 | 2016-05-11 | 西北工业大学 | Thermal type steam dryness meter |
| CN105588855A (en) * | 2016-01-12 | 2016-05-18 | 西安若水电气设备有限公司 | Steam dryness and flow measurement device and method |
| CN111714669A (en) * | 2014-03-11 | 2020-09-29 | 史赛克公司 | Sterilization container with battery-powered sensor module for monitoring the environment within the container |
| WO2022105391A1 (en) * | 2020-09-14 | 2022-05-27 | 湖南明康中锦医疗科技发展有限公司 | Temperature and humidity sensor mounting structure and respiratory support device |
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Family Cites Families (5)
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| JP2000346305A (en) * | 1999-06-09 | 2000-12-15 | Spirax Sarco Ltd | Method and apparatus for measuring dryness of saturated steam |
| CN1094592C (en) * | 2000-03-02 | 2002-11-20 | 郑金华 | Automatic testing and control method of dryness fraction of boiler |
| JP2002276901A (en) * | 2001-03-15 | 2002-09-25 | Tlv Co Ltd | Vapor dryness or wetness measuring device |
| CN2566233Y (en) * | 2002-04-19 | 2003-08-13 | 清华大学 | Double-parameter measuring device for metering saturated steam dryness and flow |
| CN100573129C (en) * | 2006-05-31 | 2009-12-23 | 西北工业大学 | A kind of coagulating type steam quality measurement device and measuring method |
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2008
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353412A (en) * | 2011-07-08 | 2012-02-15 | 中国计量科学研究院 | Wet saturated vapor dryness and flow integral measurement device and measurement method |
| CN102353412B (en) * | 2011-07-08 | 2013-04-03 | 中国计量科学研究院 | Wet saturated vapor dryness and flow integral measurement device and measurement method |
| CN103134834A (en) * | 2013-01-30 | 2013-06-05 | 东南大学 | Device and method for measuring dryness of wet steam |
| CN103185735A (en) * | 2013-03-08 | 2013-07-03 | 杨善让 | Soft measurement method based on variable-boundary segmentation energy balance, multifunctional wet steam measuring needle and wet steam heat absorption measurement and control device |
| CN103185735B (en) * | 2013-03-08 | 2016-05-18 | 杨善让 | Based on the flexible measurement method, multifunctional wet steam chaining pin and the moist steam caloric receptivity measure and control device that become boundary's segmentation energy balance |
| CN111714669A (en) * | 2014-03-11 | 2020-09-29 | 史赛克公司 | Sterilization container with battery-powered sensor module for monitoring the environment within the container |
| CN105572168A (en) * | 2015-12-15 | 2016-05-11 | 西北工业大学 | Thermal type steam dryness meter |
| CN105588855A (en) * | 2016-01-12 | 2016-05-18 | 西安若水电气设备有限公司 | Steam dryness and flow measurement device and method |
| WO2022105391A1 (en) * | 2020-09-14 | 2022-05-27 | 湖南明康中锦医疗科技发展有限公司 | Temperature and humidity sensor mounting structure and respiratory support device |
| CN114856530A (en) * | 2021-01-20 | 2022-08-05 | 中国石油化工股份有限公司 | Petroleum wellhead instrument installation component |
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|---|---|
| CN101520424B (en) | 2012-05-30 |
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Effective date of registration: 20140822 Address after: 226600 the Yellow Sea Avenue, Haian, Jiangsu province (West), No. 268, No. Patentee after: Nantong Tianlan Environmental Protection & Energy Equipment Co., Ltd. Patentee after: Northwestern Polytechnical University Address before: 710072 Xi'an friendship West Road, Shaanxi, No. 127 Patentee before: Northwestern Polytechnical University |