CN110715698A - High-temperature material flow rate measuring device and measuring method thereof - Google Patents
High-temperature material flow rate measuring device and measuring method thereof Download PDFInfo
- Publication number
- CN110715698A CN110715698A CN201910941174.0A CN201910941174A CN110715698A CN 110715698 A CN110715698 A CN 110715698A CN 201910941174 A CN201910941174 A CN 201910941174A CN 110715698 A CN110715698 A CN 110715698A
- Authority
- CN
- China
- Prior art keywords
- temperature material
- target
- target rod
- flow rate
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/001—Means for regulating or setting the meter for a predetermined quantity
Abstract
The invention discloses a high-temperature material flow rate measuring device and a measuring method thereof. The target rod adopts a hollow rod-shaped structure, and the target sheet and the strain sensor are respectively arranged at two ends of the target rod. The target rod and the target sheet extend into the high-temperature material channel to be detected, and the other end of the target rod is fixedly connected with the wall surface of the target rod. The high-temperature material impacts the target plate to deform the target plate; detecting by strain sensor and transmitting deformation quantity signal to sampling control device to obtain deformation quantity epsilon of target rod under the action of high-temperature material impact force F, and calculating the deformation quantity epsilon
Calculating the average impact velocity of the high-temperature material
By the formulaCalculating to obtain the flow rate G of the high-temperature materials. The invention adopts the mode that the target sheet is stressed and transmits signals to the sensor through mechanical transmission, avoids the sensor from working in a high-temperature environment, and has the advantages of simple measurement method, small disturbance and the like.
Description
Technical Field
The invention relates to a high-temperature material flow rate measuring device and a measuring method thereof, belonging to the technical field of combustion.
Background
Dense phase particle pipeline transportation is a process widely applied to industries such as energy, chemical industry, petroleum and metallurgy, and the on-line measurement of material flow rate is beneficial to improving production efficiency, monitoring the running state of a pipeline and the like. On the one hand, particles can flush the measuring equipment when the gas-solid sealed phase flows, and the measuring equipment is damaged. On the other hand, many high temperature dense phase transport apparatus operate in high temperature environments, limiting the application of many sensors. The existing measuring method is concentrated on a cold state experiment table at present and lacks of mature technology which can be applied to hot state equipment.
The current cold state measurement methods mainly include a weighing method, a trace particle method, an acoustic/optical sensor method and an impact flowmeter method. The weighing method is that for a vertical or inclined pipeline, the descending path of the material at a certain time of operation in a sudden stage calculates the material flow rate by measuring the material accumulation rate. However, this method is only observable in cold benches and can disrupt the continuous operation of the plant. The trace particle method and the acoustic/optical sensor method have high requirements on the sensor, and no sensor which can be directly applied to a high-temperature environment exists at present. In addition, researchers have proposed measuring the material flow rate in the riser of a circulating fluidized bed using an impact flow meter by placing an inverted V-shaped disk in the dilute phase region of the riser of a cold bench to reverse the material flow rate by measuring the force applied. The method can be used for on-line measurement, and can also meet the requirement of high-temperature measurement through proper structural design, but the non-uniformity of particle impact in a dilute phase region brings larger measurement errors to the method.
In conclusion, the existing measuring method can not realize the measuring requirement of the flow rate of the dense-phase material at high temperature due to the reasons of destroying the continuous operation of equipment, being incapable of enduring high-temperature operation environment and the like.
Disclosure of Invention
The invention aims to provide a high-temperature material flow rate measuring device and a measuring method thereof, which can be applied to the measurement of the flow rate of high-temperature materials.
The invention is realized by the following technical scheme:
the high-temperature material flow rate measuring device comprises a target sheet, a target rod, a strain sensor and a sampling and controlling device connected with the strain sensor; the target rod is of a hollow rod-shaped structure; the target sheet is fixedly arranged at one end of the target rod, and the strain sensor is arranged at the other end, opposite to the target sheet, of the target rod.
In the above technical scheme, the measuring device further comprises a protective sleeve and a blower; the protective sleeve is arranged outside the target rod in a sleeve mode, and the blowing device is connected with the protective sleeve and the mining and controlling device respectively.
In the technical scheme, the inner wall surface of the protective sleeve is provided with the baffle, the baffle is arranged between the protective sleeve and the target rod in a surrounding manner, and the minimum distance between the baffle and the target is 0.01-0.5 m.
In the technical scheme, the target rod is provided with a plurality of thermocouples, and the thermocouples are connected with the mining and controlling device.
In the technical scheme, the wall surface of the protective sleeve is provided with a plurality of discharge holes, and the discharge holes are arranged between the baffle and the strain sensor.
In the technical scheme, a water-cooling sleeve is further arranged outside the protective sleeve.
An impact type high-temperature material flow rate measurement method, comprising:
selecting a high-temperature material channel to be detected, extending the target rod and the target sheet into the high-temperature material channel to be detected from the wall surface of the high-temperature material channel to be detected, and fixedly connecting the other end of the target rod with the wall surface of the high-temperature material channel to be detected, so that the central axes of the target sheet and the target rod are perpendicular to the flow direction of the high-temperature material;
the high-temperature material flows in the high-temperature material channel to be detected, and impacts are formed on the target sheet, so that the target sheet deforms; detecting a target rod variable quantity signal through a strain sensor, transmitting the variable quantity signal to the sampling and control device to obtain a deformation quantity epsilon of the target rod under the action of high-temperature material impact force F, and obtaining the deformation quantity epsilon of the target rod under the action of a formula
Calculating the average impact velocity of the high-temperature material
Wherein, CDThe target sheet streaming resistance coefficient is shown, rho is the density of the high-temperature material in the high-temperature material channel to be measured, and A is the stress area of the target sheet;
by the formula
Calculating to obtain the flow rate G of the high-temperature materials。
In the above technical solution, the method further includes:
and obtaining a target rod temperature signal through the thermocouple, transmitting the target rod temperature signal to the acquisition and control device, comparing the acquisition and control device with a preset temperature value, starting the blower when the target rod temperature signal is greater than the preset temperature value, and introducing compressed air into the protective sleeve.
The invention has the following advantages and beneficial effects: the sensor is prevented from working in a high-temperature environment by the transmission mode of the target sheet and the target rod, and is prevented from being washed by materials, so that the precision and the service life of the sensor are improved; the measuring device has simple structure and small influence on the material flow.
Drawings
Fig. 1 is a schematic view of a high-temperature material flow rate measuring device according to the present invention.
In the figure: 1-target sheet; 2-target bar; 3-protecting the sleeve; 4-a baffle plate; 5-a discharge hole; 6-a mining and controlling device; 7-a purge; 8-a strain sensor; 9-a thermocouple; 10-water-cooling sleeve; 11-a fixing frame.
Detailed Description
The following describes the embodiments and operation of the present invention with reference to the accompanying drawings.
The terms of orientation such as up, down, left, right, front, and rear in the present specification are established based on the positional relationship shown in the drawings. The corresponding positional relationship may also vary depending on the drawings, and therefore, should not be construed as limiting the scope of protection.
As shown in FIG. 1, the high-temperature material flow rate measuring device comprises a target sheet 1, a target rod 2, a strain sensor 8 and a sampling control device 6. Target rod 2 chooses hollow rod-like structure for use, and target sheet 1 is fixed to be set up in the one end of target rod 2, and strain sensor 8 sets up at the other end of target rod 2, and is relative with target sheet 1. The strain sensor 8 is typically fixed within its hollow rod-like structure against the target shaft 2.
The target 1 includes an elliptical sheet, a circular sheet, a polygonal sheet, a oblate sphere, and the like. The stress surface is usually the surface with the largest surface area, so that the probability of material impact is ensured to be the largest. The stressed surface area of the target 1 is a.
Because target 1 and target pole 2 will stretch into high temperature material passageway and detect, in order to prevent the thermal stress damage, target pole 2 still is provided with protective case 3 outward, and both are concentric telescopic setting. The protective sleeve 3 is connected with a blower 7, compressed air is sprayed from the blower 7, an air cooling effect can be formed on the protective sleeve 3 and the target rod 2 in the protective sleeve 3, and meanwhile high-temperature materials entering the protective sleeve 3 can be blown out of the protective sleeve 3. The purger 7 is also connected to the sampling control device 6 through a data I/O line (input/output) so that the start-up of the purger 7 and the amount of purge gas can be adjusted.
The inner wall surface of the protective sleeve 3 is provided with a baffle 4, the baffle 4 is arranged between the protective sleeve 3 and the target rod 2 around, a gap formed between the baffle 4 and the target rod 2 is small, and the high-temperature material entering into the protective sleeve 3 is reduced. The minimum distance between the baffle 4 and the target sheet 1 is 0.01-0.5 m. Discharge hole 5 has been seted up to protective case 3 wall, and discharge hole 5 sets up between baffle 4 and strain sensor 8, and is close to baffle 4 setting. The discharge opening 5 is usually arranged on the back side in the incoming flow direction. The discharge hole 5 may be provided in plural, and the plural discharge holes may be arranged in the axial direction.
The target rod 2 is provided with a plurality of thermocouples 9, and the thermocouples 9 are connected with the acquisition and control device 6 and can acquire and monitor the on-way temperature field of the target rod 2.
In order to further protect the target rod 2, a water-cooling sleeve 10 is further arranged outside the protective sleeve 3, and the water-cooling sleeve 10 is filled with cooling water to cool the protective sleeve 3 and the target rod 2 inside the protective sleeve.
When the method is applied to measuring the concentration of the high-temperature material, the channel of the high-temperature material to be measured and the position of a measuring point thereof are selected firstly. And a measuring hole is formed on the wall surface of the high-temperature material channel corresponding to the measuring point. The target rod 2 with the protective sleeve 3 and the target sheet 1 stretch into the high-temperature material channel to be detected from the wall surface of the high-temperature material channel to be detected, and the other end of the target rod 2 is fixedly connected with the wall surface of the high-temperature material channel to be detected, so that the central axis of the target sheet 1 and the central axis of the target rod 2 are perpendicular to the flow direction of the high-temperature material.
One of the implementation modes is that a fixing frame 11 is arranged at one end of the target rod 2 and one end of the protective sleeve 3, which are far away from the target sheet 1, the target rod 2 and the protective sleeve 3 are fixed in advance, and the fixing frame 11 is fixed on the wall surface of a high-temperature material channel to be detected during use.
The ratio of the stress area A of the target sheet to the sectional area of the high-temperature material channel to be detected is 1 (200-1000), so that the disturbance of the target sheet to the material flow is reduced as much as possible while the material flow rate is effectively detected.
The high-temperature material flows in the high-temperature material channel to be measured, and impacts the target sheet 1 to enable the target sheet 1 to generate elastic deformation. Detecting the deformation quantity signal of the target rod 2 through the strain sensor 8, transmitting the deformation quantity signal to the sampling and control device 6 to obtain the deformation quantity epsilon of the target rod 2 under the action of the impact force F of the high-temperature material through a formula
Calculating the average impact velocity of the high-temperature material
Wherein, CDIs the streaming resistance coefficient of the target piece, and rho is the waiting timeAnd (3) measuring the density of the high-temperature material in the high-temperature material channel, wherein A is the stress area of the target sheet 1. Target sheet streaming resistance coefficient CDThe method is obtained according to a relation curve of the three-dimensional object streaming resistance coefficient and the Reynolds number Re, and the process is obtained through calculation by an impact velocity v iteration method.
Further by the formula
Calculating to obtain the flow rate G of the high-temperature materials。
In the measuring process, a target rod temperature signal is obtained through the thermocouple 9, the target rod temperature signal is transmitted to the sampling control device 6 to be compared with a preset temperature value, when the target rod temperature signal is larger than the preset temperature value, the blower 7 is started, compressed air is introduced into the protective sleeve 3 to cool and blow the entering material particles.
The measuring device can also be used for measuring the flow rate of the material at normal temperature.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The high-temperature material flow rate measuring device is characterized by comprising a target sheet (1), a target rod (2), a strain sensor (8) and a sampling and control device (6) connected with the strain sensor (8); the target rod (2) is of a hollow rod-shaped structure; the target sheet (1) is fixedly arranged at one end of the target rod (2), and the strain sensor (8) is arranged at the other end, opposite to the target sheet (1), of the target rod (2).
2. The high temperature material flow rate measuring device according to claim 1, wherein the measuring device further comprises a protective sleeve (3) and a purge (7); the protective sleeve (3) is arranged outside the target rod (2) in a sleeve mode, and the blowing device (7) is connected with the protective sleeve (3) and the mining and controlling device (6) respectively.
3. The high-temperature material flow rate measuring device according to claim 2, wherein a baffle (4) is arranged on the inner wall surface of the protective sleeve (3), the baffle (4) is arranged between the protective sleeve (3) and the target rod (2) in a surrounding manner, and the minimum distance between the baffle (4) and the target sheet (1) is 0.01-0.5 m.
4. A high temperature material flow rate measuring device according to claim 3, wherein a plurality of thermocouples (9) are arranged on the target rod (2), and the thermocouples (9) are connected with the sampling control device (6).
5. The high-temperature material flow rate measuring device as claimed in claim 3, wherein a discharge hole (5) is formed in the wall surface of the protective sleeve (3), and the discharge hole (5) is arranged between the baffle (4) and the strain sensor (8).
6. A high temperature material flow rate measuring device according to claim 3, characterized in that a water cooling sleeve (10) is arranged outside the protective sleeve (3).
7. An impact type high temperature material flow rate measuring method using the high temperature material flow rate measuring device according to claim 1, the method comprising:
selecting a high-temperature material channel to be detected, extending the target rod (2) and the target sheet (1) into the high-temperature material channel to be detected from the wall surface of the high-temperature material channel to be detected, and fixedly connecting the other end of the target rod (2) with the wall surface of the high-temperature material channel to be detected, so that the central axes of the target sheet (1) and the target rod (2) are vertical to the flow direction of the high-temperature material;
the high-temperature material flows in the high-temperature material channel to be detected, and impacts are formed on the target sheet (1) to enable the target sheet (1) to deform; detecting a deformation quantity signal of the target rod (2) through a strain sensor (8), and transmitting the deformation quantity signal to the mining and control device (6) to obtain the target rod (2) under the action of high-temperature material impact force FThe amount of deformation epsilon, by formula 
Calculating the average impact velocity of the high-temperature materialWherein, CDIs the target sheet streaming resistance coefficient, rho is the density of the high-temperature material in the high-temperature material channel to be measured, and A is the stress area of the target sheet (1);
by the formula
Calculating to obtain the flow rate G of the high-temperature materials。
8. The impulse high temperature material flow rate measurement method according to claim 7, wherein said measurement device further comprises a protection sleeve (3) and a purge (7); the protective sleeve (3) is arranged outside the target rod (2) in a sleeve mode, and the blowing device (7) is connected with the protective sleeve (3) and the mining and controlling device (6) respectively; a plurality of thermocouples (9) are arranged on the target rod (2), and the thermocouples (9) are connected with the mining and controlling device (6); the method further comprises the following steps:
and obtaining a target rod temperature signal through the thermocouple (9), transmitting the target rod temperature signal to the acquisition and control device (6), comparing the target rod temperature signal with a preset temperature value, starting the purging device (7) when the target rod temperature signal is greater than the preset temperature value, and introducing compressed air into the protective sleeve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941174.0A CN110715698A (en) | 2019-09-30 | 2019-09-30 | High-temperature material flow rate measuring device and measuring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910941174.0A CN110715698A (en) | 2019-09-30 | 2019-09-30 | High-temperature material flow rate measuring device and measuring method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110715698A true CN110715698A (en) | 2020-01-21 |
Family
ID=69212139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910941174.0A Pending CN110715698A (en) | 2019-09-30 | 2019-09-30 | High-temperature material flow rate measuring device and measuring method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110715698A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2337530Y (en) * | 1998-04-09 | 1999-09-08 | 上海普联科技有限公司 | Impulse flowmeter |
| CN103954306A (en) * | 2014-04-15 | 2014-07-30 | 无锡市星翼仪表科技有限公司 | Miniaturization high-precision micro-range sensor and flow meter |
| CN107389971A (en) * | 2017-07-20 | 2017-11-24 | 清华大学 | A kind of on-line measurement device of On Solids Recirculating Flowrate of Circulating Fluidized Bed |
| CN207730290U (en) * | 2017-12-28 | 2018-08-14 | 重庆联大仪表有限公司 | One kind preventing high temperature drift cantilever beam sensor |
| CN207741801U (en) * | 2018-01-30 | 2018-08-17 | 厦门厦仪科技有限公司 | A kind of intelligent target type meter |
| US20180321075A1 (en) * | 2017-05-02 | 2018-11-08 | Cdi Meters, Inc. | Zeroing a Target Flowmeter |
| CN208505383U (en) * | 2018-07-10 | 2019-02-15 | 厦门均溪自控有限公司 | A kind of online installation target type meter |
-
2019
- 2019-09-30 CN CN201910941174.0A patent/CN110715698A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2337530Y (en) * | 1998-04-09 | 1999-09-08 | 上海普联科技有限公司 | Impulse flowmeter |
| CN103954306A (en) * | 2014-04-15 | 2014-07-30 | 无锡市星翼仪表科技有限公司 | Miniaturization high-precision micro-range sensor and flow meter |
| US20180321075A1 (en) * | 2017-05-02 | 2018-11-08 | Cdi Meters, Inc. | Zeroing a Target Flowmeter |
| CN107389971A (en) * | 2017-07-20 | 2017-11-24 | 清华大学 | A kind of on-line measurement device of On Solids Recirculating Flowrate of Circulating Fluidized Bed |
| CN207730290U (en) * | 2017-12-28 | 2018-08-14 | 重庆联大仪表有限公司 | One kind preventing high temperature drift cantilever beam sensor |
| CN207741801U (en) * | 2018-01-30 | 2018-08-17 | 厦门厦仪科技有限公司 | A kind of intelligent target type meter |
| CN208505383U (en) * | 2018-07-10 | 2019-02-15 | 厦门均溪自控有限公司 | A kind of online installation target type meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5212407B2 (en) | Thermal fatigue test equipment | |
| CN105510625B (en) | System and method for measuring wind speed of powder-containing airflow of powder feeding pipeline of coal-fired boiler | |
| CN116907716B (en) | Thermal noise suppression based torsion pendulum type micro-thrust measuring device and method | |
| US10036662B2 (en) | Flow rate calculation system and flow rate calculation method | |
| CN103854712B (en) | Measure graphite dust granule and play the apparatus and method of dirt | |
| CN110715698A (en) | High-temperature material flow rate measuring device and measuring method thereof | |
| CN107643131A (en) | A kind of heat pipe-type temperature measuring apparatus and method | |
| Tanno et al. | Aeroheating measurement of Apollo shaped capsule with boundary layer trip in the free-piston shock tunnel HIEST | |
| CN103308106A (en) | Mass flowmeter for high-pressure inert gas extinguishing agent | |
| CN101736109A (en) | Device and method for measuring deformation angle of small sleeve and medium sleeve of blast-furnace tuyere | |
| CN205958127U (en) | Carbide stove high temperature end flue gas temperature -detecting device | |
| KR101508827B1 (en) | Plasma diagnostic apparatus and the methode of the same | |
| JP7307341B2 (en) | Furnace gas pressure fluctuation detection method | |
| Z'Graggen et al. | Gas temperature measurement in thermal radiating environments using a suction thermocouple apparatus | |
| CN108088510A (en) | Thermal mass flow sensors | |
| CN106813581A (en) | A kind of measuring method for reinforcing fiber glass melting kiln | |
| TW201719131A (en) | Chamber pressure measuring method useful for measuring pressure of a chamber containing high temperature and erosive gas | |
| CN105509916A (en) | Large-length-diameter-ratio L-shaped dual-shielding type reference airflow high-temperature sensor | |
| JP2016080630A (en) | Thermal shock test device | |
| CN110873635A (en) | Transonic gas-solid two-phase nozzle jet flow experimental device and experimental method | |
| JP7284706B2 (en) | Fluidized bed reactor and method for producing trichlorosilane | |
| CN109378682A (en) | A kind of device generating novel substance using laser bombardment target | |
| CN210953323U (en) | Transonic speed gas-solid two-phase nozzle jet flow experimental device | |
| CN213397575U (en) | Device for auxiliary measurement of speed and concentration of dust-containing gas | |
| JP2020037163A (en) | Shot processing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200121 |