CN108332809A - A kind of mass flow meter of Dual-Phrase Distribution of Gas olid - Google Patents
A kind of mass flow meter of Dual-Phrase Distribution of Gas olid Download PDFInfo
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- CN108332809A CN108332809A CN201810134491.7A CN201810134491A CN108332809A CN 108332809 A CN108332809 A CN 108332809A CN 201810134491 A CN201810134491 A CN 201810134491A CN 108332809 A CN108332809 A CN 108332809A
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- sensor
- mass flow
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- measurement
- phrase distribution
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a kind of mass flow meters of Dual-Phrase Distribution of Gas olid, including：Housing main body is tubular structure；Sensor core; it is set to inside the housing main body; the sensor core includes the sensor substrate of a tubular structure; in being provided with measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor in the sensor substrate, the measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor are isolated by guard electrode；Signal processing case, it is set on the housing main body, it is electrically connected, is placed in the signal processing case for obtaining and the measurement data of concentration for the treatment of measurement capacitance sensor and electrostatic ring velocity measurement sensor is to obtain the integrated circuit of the mass flow of the Dual-Phrase Distribution of Gas olid by sensor core with sensor core.The mass flow meter of Dual-Phrase Distribution of Gas olid provided by the invention is stable and reliable for performance, it is accurate, easy for installation to measure, and solves the problems, such as pulverized coal mass flow on-line measurement in coal gasification engineering.
Description
Technical field
The present invention relates to fluid measurement technical field more particularly to a kind of mass flow meters of Dual-Phrase Distribution of Gas olid.
Background technology
With the rapid development of economy, energy demand increasingly increases, and it is short in face of the waste of serious energy consumption, energy resources
Scarce phenomenon, Optimization of Energy Structure improve the important guarantee that efficiency of energy utilization is long-term sustainable development.And energy meter
It is energy-saving and emission-reduction, reduces the foundation stone of environmental pollution, therefore it is to promote to strengthen energy measurement management, promote energy measurement level
The important prerequisite and necessary means of energy-saving and emission-reduction.
In metallurgical industry, blast furnace pulverized coal injection is one and efficiency of combustion, a large amount of energy saving important technologies can be improved
Measure, fine coal airflow bed gasification furnace have high high carbon conversions, good coal adaptability, effective gas ingredient, oxygen consumption and coal consumption
Low advantage, therefore the application prospect of bed pulverized coal gasification technology is expected.Although current coal spraying process comparative maturity, due to
The flow process of gas-particle two-phase fluid is complicated, it is difficult to find its flowing law, the measurement of the mass flow of gas-particle two-phase fluid at
For problem, the flow measurement device such as impulse force formula, differential pressure type, thermal balance type is had developed both at home and abroad at present, but these devices are all
There is limitations in varying degrees, not extensive use in the industrial production, still cannot examine in real time reliably, online
Survey the mass flow of high pressure Dual-Phrase Distribution of Gas olid in each jet pipe.
Invention content
Technical problem to be solved by the present invention lies in propose it is a kind of it is stable and reliable for performance, measure it is accurate, easy for installation,
The mass flow meter of the Dual-Phrase Distribution of Gas olid of debugging easy to maintain.
To solve the above problems, the present invention uses following technical scheme：
A kind of mass flow meter of Dual-Phrase Distribution of Gas olid, including：
Housing main body is tubular structure, and the both ends of the housing main body are connect by a connector with pipeline respectively；
Sensor core is set to inside the housing main body, and the sensor core includes the sensing of a tubular structure
Device substrate, it is described in being provided with measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor in the sensor substrate
Measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor are isolated by guard electrode；
Signal processing case is set on the housing main body, is electrically connected with sensor core, the signal processing case
It is inside placed with for obtaining and concentration for the treatment of measures the measurement data of capacitance sensor and electrostatic ring velocity measurement sensor to obtain
Obtain the integrated circuit of the mass flow of the Dual-Phrase Distribution of Gas olid by sensor core.
Wherein, the measurement of concetration capacitance sensor includes source electrode and detecting electrode, the source electrode and detecting electrode
It is used as isolation by guard electrode to be symmetricly set on the circumference of sensor substrate；The electrostatic ring velocity measurement sensor packet
It includes upstream and measures ring and measured downstream ring, the upstream measures ring and measured downstream ring and is used as before and after isolation by guard electrode
It is arranged in sensor substrate.
Wherein, the source electrode of the measurement of concetration capacitance sensor in the sensor substrate and detecting electrode, electrostatic ring speed
The upstream for spending measurement sensor measures ring and measured downstream ring and guard electrode by way of electroless copper and laser cutting
It is formed in sensor substrate surface.
Wherein, the connector includes a connecting flange, a connection bolt and an abutted flange, the connecting flange
One end connecting pipe, the other end are bolted the abutted flange by the connection, are offered in the abutted flange
Position limiting sealed slot, for coordinating housing main body to seal and fixed sensor core.
Wherein, between the connecting flange and pipeline, between connecting flange and connection bolt, connection bolt and rendezvous method
It is both provided between abutted flange and housing main body between orchid for sealing and dust-proof gasket seal.
Wherein, the both ends of the sensor core are cased with plug washer, between the sensor core and abutted flange
Gap and plug washer be interference fitted.
Wherein, the connecting flange is the tongue and groove flange of high pressure-bearing.
Wherein, the babinet of the signal processing case is prepared using the explosion-proof lamp for having done flame proof processing.
Wherein, the gasket seal is stainless steel graphite wound gasket.
Wherein, the sensor substrate is prepared using aluminium oxide ceramics.
Compared with prior art, beneficial effects of the present invention are：The quality stream of Dual-Phrase Distribution of Gas olid provided by the invention measures
It measures device signal processing case is mounted on housing main body, sensor core is set to inside the housing main body, passes through connection
Device is mounted in transport system, and signal processing case obtains measurement of concetration capacitance sensor and electrostatic ring speed in sensor substrate
The signal in measurement sensor is spent, calculation processing obtains the mass flow of Dual-Phrase Distribution of Gas olid, measuring device performance is reliable and stable,
It measures accurate, easy for installation, solves the problems, such as pulverized coal mass flow on-line measurement in coal gasification engineering.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, in being described below to the embodiment of the present invention
Required attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the present invention
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to the present invention
The content of embodiment and these attached drawings obtain other attached drawings.
Fig. 1 is a kind of structure of the mass flow meter for Dual-Phrase Distribution of Gas olid that the specific embodiment of the invention provides
Schematic diagram.
Fig. 2 is a kind of structural schematic diagram for sensor core that the specific embodiment of the invention provides.
Wherein：1- connecting flanges；2- connection bolts；3- abutted flanges；4- housing main bodies；5- signal processing casees；The upstreams 6-
Measure ring；7- measured downstream rings；8- source electrodes；9- detecting electrodes；10- sensor substrates；11- guard electrodes.
Specific implementation mode
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution of the embodiment of the present invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Fig. 1 is a kind of structure of the mass flow meter for Dual-Phrase Distribution of Gas olid that the specific embodiment of the invention provides
Schematic diagram, as shown in Figure 1, the mass flow meter of Dual-Phrase Distribution of Gas olid provided in this embodiment includes：Housing main body 4 is
The both ends of tubular structure, the housing main body 4 are connect by a connector with pipeline respectively；Sensor core is set to described
Inside housing main body 4, the sensor core 4 includes the sensor substrate 10 of a tubular structure, in the sensor substrate 10
On be provided with measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor, the measurement of concetration capacitance sensor and quiet
Electric ring velocity measurement sensor is isolated by guard electrode 11；Signal processing case 5 is set on the housing main body 4, with biography
Sensor core is electrically connected, be placed in the signal processing case 5 for obtain and concentration for the treatment of measure capacitance sensor and
The measurement data of electrostatic ring velocity measurement sensor is to obtain the collection of the mass flow of the Dual-Phrase Distribution of Gas olid by sensor core
At circuit.
Signal processing case is mounted on housing main body by the mass flow meter of Dual-Phrase Distribution of Gas olid provided in this embodiment
On, sensor core is set to inside the housing main body, is mounted in transport system by connector, signal processing case obtains
The signal on the measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor in sensor substrate, calculation processing is taken to obtain
To the mass flow of Dual-Phrase Distribution of Gas olid, measuring device performance is reliable and stable, measurement is accurate, easy for installation, solves coal gas chemical industry
In journey the problem of pulverized coal mass flow on-line measurement.
Fig. 2 is a kind of structural schematic diagram for sensor core that the specific embodiment of the invention provides, as shown in Fig. 2, at this
In embodiment, measurement of concetration capacitance sensor includes source electrode 8 and detecting electrode 9, and the source electrode 8 and detecting electrode 9 pass through
Guard electrode is symmetricly set on as isolation on the circumference of sensor substrate 10, passes through guarantor between garden foundation 8 and detecting electrode 9
Shield electrode isolation can reduce the edge effect of capacitance, and measurement of concetration capacitance sensor is also required to meet coal dust measurement uniformity
It is required that；The electrostatic ring velocity measurement sensor includes that upstream measures ring 6 and measured downstream ring 7, and the upstream measures 6 He of ring
Measured downstream ring 7 is used as the front and back setting of isolation in sensor substrate by guard electrode 11.
As a preferred embodiment, the source electrode 8 of the measurement of concetration capacitance sensor in sensor substrate and detection
Electrode 9, the upstream measurement ring 6 of electrostatic ring velocity measurement sensor and measured downstream ring 7 and guard electrode 11 pass through chemical plating
The mode of copper and laser cutting is formed in sensor substrate surface.Guard electrode 11 does grounding, plays interelectrode isolation
Effect reduces interelectrode influence each other.As a preferred embodiment, the sensor substrate 10 is made pottery using aluminium oxide
Porcelain is prepared, the outer surface shape of measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor in sensor substrate 10
At Dual-Phrase Distribution of Gas olid flows through inside sensor substrate, is not sensed with measurement of concetration capacitance sensor and electrostatic ring tachometric survey
Device is in direct contact, and avoids abrasion and pollution of the Dual-Phrase Distribution of Gas olid to measurement of concetration capacitance sensor and electrostatic ring tachometric survey,
It is conducive to extend the service life of sensor core, improves the stability of sensor core.
As a preferred embodiment, the babinet of the signal processing case 5 is using the explosion-proof lamp for having done flame proof processing
It is prepared, signal processing case 5 includes the integrated circuit that signal occurs, acquires, improves and handle.
In some embodiments, the connector includes a connecting flange 1, one connection bolt 2 and an abutted flange 3, institute
One end connecting pipe of connecting flange 1 is stated, the other end connects the abutted flange 3 by the connection bolt 2, described
Position limiting sealed slot is offered in abutted flange 3, for coordinating housing main body 4 to seal and fixed sensor core.Connect bolt 2
The bolt connected between connector and pipeline.
As a preferred embodiment, between connecting flange 1 and pipeline, connecting flange 1 and connection bolt 2 between, even
It is both provided between abutted flange 3 and housing main body 4 between connecting bolt 2 and abutted flange 3 for sealing and dust-proof close
Gasket.As a preferred embodiment, the connecting flange 1 is the tongue and groove flange of high pressure-bearing, and is placed in slot close
Gasket.All gasket seals are for that Dual-Phrase Distribution of Gas olid is avoided to leak, with the caused influence to environment and to quality stream
The influence of the measurement precision of amount.As a preferred embodiment, the gasket seal is stainless steel graphite wound gasket.
As a preferred embodiment, the both ends of sensor core are cased with plug washer, the sensor core and
Gap between abutted flange 3 is interference fitted with plug washer, for the sealing of sensor chip and dust-proof.The core
Silicon rubber preparation can be used in sealing ring, is double-layer sealing structure.
Dual-Phrase Distribution of Gas olid mass flow meter provided in this embodiment can be used for severe working environment, realize coal
The quick accurate measurement of powder Dual-Phrase Distribution of Gas olid pulverized coal mass flow, fully considers coal dust Dual-Phrase Distribution of Gas olid fluid situations, using electricity
Hold Fundamentals of Sensors carry out fine coal measurement of concetration, using electrostatic principle carry out fine coal tachometric survey, by speed, concentration with
Relationship between mass flow finally obtains pulverized coal mass flow, realizes the contactless real-time measurement of fine coal mass flow.
Measurement of concetration principle is that have different dielectrics since each phase substance of coal dust gas-particle two-phase fluid is different
Constant.When fluid between capacitor plate by being formed by detecting field, since the variation of coal powder density can cause the equivalent of fluid
The change of dielectric constant, to make the capacitance output valve of sensor change correspondingly.Therefore, the size of capacitance can be used as more
Mutually flow the measurement of phase concentration.If the effective dielectric constant of two-phase fluid is εeff, the dielectric constant of solid phase and gas phase is respectively ε s
With ε g, if solid phase is uniformly distributed in the gas phase, εeffIt is determined by the volume ratio of gas-particle two-phase：
In formula, VSAnd VgThe volume that respectively solid phase and gas phase respectively account for；The totality of V detecting fields between capacitance sensor pole plate
Product, and V=Vs+Vg, εsAnd εgKnow electric constant for oneself.
It can then be obtained by formula (1):
If volume concentration of solid phase is β, then
Therefore have:
In formula:K is the characteristic parameter determined by capacitor sensor structure size, structure.
By formula (4) as it can be seen that existence function relationship between capacitance C and volume concentration of solid phase β.It follows that measuring sensing
The difference of capacitance when capacitance and its blank pipe when flowing through coal dust in device, so that it may derive its concentration signal.
The tachometric survey of tachometric survey principle in the certain distance of coal dust flow duct upstream and downstream by installing an electrostatic ring
Velocity measurement sensor (including upstream velocity sensor and downstream velocity sensor) obtains the speed letter of coal dust flowing in pipeline
Number, it obtains coal dust in conjunction with cross-correlation technique and flows through the time between the sensor of upstream and downstream, and calculate pulverized coal particle speed in turn.
Assuming that upstream velocity sensor and downstream velocity sensor be at a distance of L, to their signal output by formula (3) into
Row computing cross-correlation acquires the corresponding transition time T of cross-correlation function peak value by peak detection, can be obtained according to formula (4)
The mean flow rate of Dual-Phrase Distribution of Gas olid：
Correlation method has the advantage not available for other traditional methods, such as measures " hydrodynamic noise ", can using simple
Realize that the non-cpntact measurement for not destroying flow field, measurement accuracy are only dependent upon the measurement accuracy etc. of sensor spacing and time delay.
According to intensity, high, corrosion resistant requirement, housing main body select stainless steel material；Measuring device is in use
It is hit by high velocity solid particle, use environment is 4.3~5.7mpa of high pressure, and measurement of concetration capacitance sensor and electrostatic
Ring velocity measurement sensor is attached directly in sensor substrate, and sensor substrate prepared by aluminium oxide ceramics has higher resistance to
Mill property, enough intensity, preferable insulating properties, and aluminium oxide ceramics have self lubricity, can solve lubricant medium and cause
Pollution.
Signal processing case is mounted on housing main body by the mass flow meter of Dual-Phrase Distribution of Gas olid provided by the invention
On, sensor core is set to inside the housing main body, is mounted in transport system by connector, signal processing case obtains
The signal on the measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor in sensor substrate, calculation processing is taken to obtain
To the mass flow of Dual-Phrase Distribution of Gas olid, measuring device performance is reliable and stable, measurement is accurate, easy for installation, solves coal gas chemical industry
In journey the problem of pulverized coal mass flow on-line measurement.
The technical principle of the present invention is described above in association with specific embodiment.These descriptions are intended merely to explain the present invention
Principle, and limiting the scope of the invention cannot be construed in any way.Based on the explanation herein, this field
Technical staff would not require any inventive effort the other specific implementation modes that can associate the present invention, these modes are all
It will fall under the scope of the present invention.
Claims (10)
1. a kind of mass flow meter of Dual-Phrase Distribution of Gas olid, which is characterized in that the measuring device includes：
Housing main body is tubular structure；
Sensor core is set to inside the housing main body, and the sensor core includes the sensor lining of a tubular structure
Bottom, in being provided with measurement of concetration capacitance sensor and electrostatic ring velocity measurement sensor, the concentration in the sensor substrate
It measures capacitance sensor and electrostatic ring velocity measurement sensor is isolated by guard electrode；
Signal processing case is set on the housing main body, is electrically connected with sensor core, is placed in the signal processing case
It is useful for obtaining and concentration for the treatment of measures the measurement data of capacitance sensor and electrostatic ring velocity measurement sensor to obtain process
The integrated circuit of the mass flow of the Dual-Phrase Distribution of Gas olid of sensor core.
2. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 1, which is characterized in that the measurement of concetration
Capacitance sensor includes source electrode and detecting electrode, and the source electrode and detecting electrode are used as isolation by guard electrode and are symmetrically set
It sets on the circumference of sensor substrate；The electrostatic ring velocity measurement sensor includes that upstream measures ring and measured downstream ring, institute
It states upstream measurement ring and measured downstream ring and the front and back setting of isolation is used as in sensor substrate by guard electrode.
3. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 2, which is characterized in that the sensor lining
The source electrode and detecting electrode of measurement of concetration capacitance sensor on bottom, electrostatic ring velocity measurement sensor upstream measure ring and
Measured downstream ring and guard electrode are formed by way of electroless copper and laser cutting in sensor substrate surface.
4. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 1, which is characterized in that the measuring device
Both ends connect respectively with pipeline by a connector, the connector include a connecting flange, one connection bolt and one docking
Flange, one end connecting pipe of the connecting flange, the other end are bolted the abutted flange, institute by the connection
It states and offers position limiting sealed slot in abutted flange, for coordinating housing main body to seal and fixed sensor core.
5. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 4, which is characterized in that the connecting flange
Between pipeline, connecting flange and it connect between bolt, between connection bolt and abutted flange and abutted flange and housing main body
Between be both provided with for sealing and dust-proof gasket seal.
6. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 4, which is characterized in that the connecting flange
For the tongue and groove flange of high pressure-bearing.
7. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 4, which is characterized in that the sensor core
The both ends of body are cased with plug washer, and the gap between the sensor core and abutted flange is matched with plug washer interference
It closes.
8. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 5, which is characterized in that the gasket seal
For stainless steel graphite wound gasket.
9. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 1, which is characterized in that the signal processing
The babinet of case is prepared using the explosion-proof lamp for having done flame proof processing.
10. the mass flow meter of Dual-Phrase Distribution of Gas olid according to claim 1, which is characterized in that the sensor
Substrate is prepared using aluminium oxide ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810134491.7A CN108332809A (en) | 2018-02-09 | 2018-02-09 | A kind of mass flow meter of Dual-Phrase Distribution of Gas olid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810134491.7A CN108332809A (en) | 2018-02-09 | 2018-02-09 | A kind of mass flow meter of Dual-Phrase Distribution of Gas olid |
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| CN108332809A true CN108332809A (en) | 2018-07-27 |
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2018
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| CN101477074A (en) * | 2008-11-06 | 2009-07-08 | 东北大学 | Two-phase flow parameter monitoring method and system |
| CN102608350A (en) * | 2012-03-23 | 2012-07-25 | 天津大学 | Method and device for detecting gas-solid two-phase flow velocity distribution by multielectrode electrostatic method |
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