CN201653466U - Wet steam flow instrument - Google Patents
Wet steam flow instrument Download PDFInfo
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- CN201653466U CN201653466U CN2010201788917U CN201020178891U CN201653466U CN 201653466 U CN201653466 U CN 201653466U CN 2010201788917 U CN2010201788917 U CN 2010201788917U CN 201020178891 U CN201020178891 U CN 201020178891U CN 201653466 U CN201653466 U CN 201653466U
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- wet steam
- dryness
- flowmeter
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Abstract
A wet steam flow instrument is characterized in that an orifice plate flow meter and an annubar tachometer are in series connection on a wet steam pipeline, a pressure gauge is mounted in the wet steam pipeline between the flowmeter and the tachometer, a dryness and flow processor is arranged in an instrument case, supporting rods of the instrument case are welded on the outer wall surface of the wet steam pipeline, and a steam thermal physical property database and a steam flow and dryness mathematical model are disposed in the dryness and flow processor. The dryness and flow processor 4 acquires a fluid static and dynamic pressure differential signal delta Pk on a pressure differential transducer of the flowmeter, a fluid pressure signal P of the pressure gauge and a dry-saturated steam flow rate Ug of the tachometer, obtains saturated water density Rho 1 and dry-saturated steam density Rho g, then combines and solves the steam flow and dryness mathematical model formed by a void fraction alpha equation, a steam dryness x equation, a steam density Rho equation and a flowmeter flow G equation, and finally obtains steam mass flow rate and steam dryness to be solved in the wet steam pipeline. The wet steam flow instrument has the advantages of high wet steam measurement precision.
Description
Technical field
What the present invention relates to is two phase flow of damp steam rerum natura technical field of measuring, is a kind of wet steam flow instrument and measuring method.
Background technology
Wet steam is gas and mixtures of liquids, is biphase gas and liquid flow, and steam quality is the important quality parameter of steam, and the gas phase dry saturated steam quality of wet steam and the ratio of wet steam quality are called steam quality.In industrial processs such as oil exploitation, chemical industry, food processing, pharmacy, be extensive use of wet steam.For the steam utilization process being implemented the otherwise effective technique monitoring, need to measure steam quality and flow.
Publication number is to disclose a kind of association type wet steam flow, dryness measurement device and measuring method thereof in the application documents of CN101038188, the core technology of this invention is: two flowmeters that are installed in series on the wet steam pipeline are standard orifice plate flowmeter and differential pressure type flowmeter, pressure gauge of auxiliary again installation, discharge model by these two flowmeters, according to law of conservation of mass, solve steam quality and flow in the jet chimney.At present,, thereby cause the measuring accuracy of this measurement mechanism relatively poor, can not reach maximum error of measuring less than 5% engineering application requirements because the discharge model error of differential pressure type flowmeter is bigger.
Adopt two flowmeters, measure the deficiency of dryness of wet steam by the flow equation simultaneous of these two flowmeters in order to overcome prior art, the present invention adopts the thinking of asking for void fraction earlier, proposes a kind of wet steam flow instrument.
Summary of the invention
For overcoming the relatively poor deficiency of measuring accuracy that exists in the prior art, the present invention proposes a kind of wet steam flow instrument and measuring method.
The present invention includes flowmeter, pressure gauge, mass dryness fraction flow processor and velocimeter, wherein, flowmeter and velocimeter are connected on the wet steam pipeline, lay respectively at the both sides of mass dryness fraction flow processor; Pressure gauge is installed in the wet steam pipeline 1 of flowmeter and velocimeter centre, and mass dryness fraction flow processor is placed in the instrument box, and the support bar of instrument box is welded on the outside wall surface of wet steam pipeline; Flow mass dryness fraction processor is built-in with steam heat physical data storehouse and steam flow mass dryness fraction mathematical model.
The present invention is connected the wet steam flow instrument on the wet steam pipeline to be measured, by the fluid dynamic and static pressure difference signal Δ P on the differential pressure transmitter of mass dryness fraction flow processor collection flowmeter
k, the fluid pressure signal P of pressure gauge 3, the dry saturated steam flow velocity U of velocimeter 5
g, draw the saturation water density p by steam heat physical data storehouse
lWith the dry saturated steam density p
gAgain the steam flow mass dryness fraction mathematical model of being made up of void fraction α equation, steam quality x equation, vapour density ρ equation, flowmeter flow G equation is carried out simultaneous solution, obtain steam mass flow and steam quality in the wet steam pipeline to be asked, have the wet steam of measurement advantage of high precision.
Description of drawings
Fig. 1 is the structural representation of wet steam flow instrument, wherein:
1. wet steam pipeline 2. flowmeters 3. pressure gauges 4. mass dryness fraction flow processors 5. velocimeters
Embodiment
Embodiment one
Present embodiment is a kind of wet steam flow instrument, being used to measure wet steam pressure is that 15MPa, wet steam flow are 5-9t/h, wet steam flow and the mass dryness fraction of steam quality in the wet steam pipeline of 60-85%, wherein, the bore of wet steam pipeline is that 56mm, wall thickness are 10mm; Flow is counted orifice flowmeter, and flow velocity is counted the even speed tube velocimeter.
Present embodiment comprises wet steam pipeline 1, orifice flowmeter 2, pressure gauge 3, mass dryness fraction flow processor 4 and even speed tube velocimeter 5.Flow mass dryness fraction processor is built-in with steam heat physical data storehouse and steam flow mass dryness fraction mathematical model.Wet steam pipeline 1 is that bore is 56mm, and wall thickness is 10mm, long 1000mm, the weldless steel tube that adopts No. 20 boiler steels to make.Orifice flowmeter 2 is connected on the wet steam pipeline 1 with even speed tube velocimeter 5, lays respectively at the both sides of mass dryness fraction flow processor 4, between the two at a distance of 760mm; Since flow path direction be the front portion of wet steam flow instrument, then flowmeter 2 preceding and velocimeter 5 after.Pressure gauge 3 is installed in the wet steam pipeline 1 of flowmeter 2 and velocimeter 5 centres.Mass dryness fraction flow processor 4 is placed in the instrument box, and the support bar of instrument box is welded on the outside wall surface of wet steam pipeline 1.
Orifice flowmeter is through the demarcation of flow calibration platform, and drawing its coefficient of flow is C
k
Embodiment two
Present embodiment is a kind of wet steam flow instrument, being used to measure wet steam pressure is that 8-18MPa, wet steam flow are 4-10t/h, wet steam flow and the mass dryness fraction of steam quality in the wet steam pipeline of 40-90%, wherein, the bore of wet steam pipeline is that 56mm, wall thickness are 10mm; Flow is counted the inner cone flowmeter, and flow velocity is counted the hot type velocimeter.
Present embodiment comprises wet steam pipeline 1, interior cone flow meter 2, pressure gauge 3, mass dryness fraction flow processor 4 and hot type velocimeter 5.Flow mass dryness fraction processor is built-in with steam heat physical data storehouse and steam flow mass dryness fraction mathematical model.Wet steam pipeline 1 is that bore is 56mm, and wall thickness is 10mm, long 1000mm, the weldless steel tube that adopts No. 20 boiler steels to make.Orifice flowmeter 2 is connected on the wet steam pipeline 1 with even speed tube velocimeter 5, lays respectively at the both sides of mass dryness fraction flow processor 4, between the two at a distance of 760mm; Since flow path direction be the front portion of wet steam flow instrument, then flowmeter 2 preceding and velocimeter 5 after.Pressure gauge 3 is installed in the wet steam pipeline 1 of flowmeter 2 and velocimeter 5 centres.Mass dryness fraction flow processor 4 is placed in the instrument box, and the support bar of instrument box is welded on the outside wall surface of wet steam pipeline 1.
Orifice flowmeter is through the demarcation of flow calibration platform, and drawing its coefficient of flow is C
k
Claims (1)
1. wet steam flow instrument, comprise flowmeter (2) and pressure gauge (3), it is characterized in that, described wet steam flow instrument also comprises mass dryness fraction flow processor (4) and velocimeter (5), wherein, flowmeter (2) is connected on the wet steam pipeline (1) with velocimeter (5), lays respectively at the both sides of mass dryness fraction flow processor (4); Pressure gauge (3) is installed in the wet steam pipeline (1) of flowmeter (2) and velocimeter (5) centre, and mass dryness fraction flow processor (4) is placed in the instrument box, and the support bar of instrument box is welded on the outside wall surface of wet steam pipeline (1); Flow mass dryness fraction processor is built-in with steam heat physical data storehouse and steam flow mass dryness fraction mathematical model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201788917U CN201653466U (en) | 2010-04-30 | 2010-04-30 | Wet steam flow instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201788917U CN201653466U (en) | 2010-04-30 | 2010-04-30 | Wet steam flow instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201653466U true CN201653466U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201788917U Expired - Fee Related CN201653466U (en) | 2010-04-30 | 2010-04-30 | Wet steam flow instrument |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839738A (en) * | 2010-04-30 | 2010-09-22 | 西北工业大学 | Wet steam flow instrument and measuring method |
| RU2488103C2 (en) * | 2011-05-27 | 2013-07-20 | Александр Васильевич Коваленко | Method of controlling detached vapour voidage and phase velocity of wet steam in steam pipe |
| RU2488105C2 (en) * | 2011-05-20 | 2013-07-20 | Александр Васильевич Коваленко | Method of measuring detached vapour voidage and moist steam phase velocity in steam pipe of steam generator |
| RU2551386C2 (en) * | 2013-08-27 | 2015-05-20 | Александр Васильевич Коваленко | Method of determination of actual volume steam content and velocities of wet steam flow in steam line downstream assembly for overheated steam and water mixing |
| RU2564451C1 (en) * | 2014-06-03 | 2015-10-10 | Александр Васильевич Коваленко | Device to determine extent of dryness, enthalpy, heat and mass flows rates of moist, saturated and superheated steam flows |
| RU2655016C2 (en) * | 2013-09-23 | 2018-05-23 | Тоталь С.А. | Method for estimating quality of steam generated in hydrocarbon production facility, qualification method for steam generator |
| RU2795756C1 (en) * | 2022-06-03 | 2023-05-11 | Владимир Сергеевич Вербицкий | Device for determining thermodynamic parameters of saturated water steam in a steam line |
-
2010
- 2010-04-30 CN CN2010201788917U patent/CN201653466U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839738A (en) * | 2010-04-30 | 2010-09-22 | 西北工业大学 | Wet steam flow instrument and measuring method |
| CN101839738B (en) * | 2010-04-30 | 2012-11-14 | 西北工业大学 | Wet steam flow instrument and measuring method |
| RU2488105C2 (en) * | 2011-05-20 | 2013-07-20 | Александр Васильевич Коваленко | Method of measuring detached vapour voidage and moist steam phase velocity in steam pipe of steam generator |
| RU2488103C2 (en) * | 2011-05-27 | 2013-07-20 | Александр Васильевич Коваленко | Method of controlling detached vapour voidage and phase velocity of wet steam in steam pipe |
| RU2551386C2 (en) * | 2013-08-27 | 2015-05-20 | Александр Васильевич Коваленко | Method of determination of actual volume steam content and velocities of wet steam flow in steam line downstream assembly for overheated steam and water mixing |
| RU2655016C2 (en) * | 2013-09-23 | 2018-05-23 | Тоталь С.А. | Method for estimating quality of steam generated in hydrocarbon production facility, qualification method for steam generator |
| RU2564451C1 (en) * | 2014-06-03 | 2015-10-10 | Александр Васильевич Коваленко | Device to determine extent of dryness, enthalpy, heat and mass flows rates of moist, saturated and superheated steam flows |
| RU2795756C1 (en) * | 2022-06-03 | 2023-05-11 | Владимир Сергеевич Вербицкий | Device for determining thermodynamic parameters of saturated water steam in a steam line |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130430 |