CN103868558A - Powder flow online detection system and method - Google Patents
Powder flow online detection system and method Download PDFInfo
- Publication number
- CN103868558A CN103868558A CN201410105714.9A CN201410105714A CN103868558A CN 103868558 A CN103868558 A CN 103868558A CN 201410105714 A CN201410105714 A CN 201410105714A CN 103868558 A CN103868558 A CN 103868558A
- Authority
- CN
- China
- Prior art keywords
- powder
- heat
- flow
- transferring medium
- heat exchanger
- 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.)
- Granted
Links
Images
Abstract
The invention provides a powder flow online detection system. The powder flow online detection system comprises a jacket heat exchanger, wherein the jacket heat exchanger is provided with a tube-pass passage and a shell-pass passage, the shell pass is arranged outside the tube pass; an inlet and an outlet of each of the tube pass and the shell pass are respectively provided with a temperature measuring element, a powder inlet heat exchanger pipeline and a powder outlet heat exchanger pipeline are respectively connected with the inlet and the outlet of the tube pass, and a heat exchanging medium inlet heat exchanger pipeline and a heat exchanging medium outlet heat exchanger pipeline are respectively connected with the inlet and the outlet of the shell pass; the outer side of a jacket heat exchanger is provided with a heat exchanger outer heat preserving layer, and the heat exchanging medium inlet heat exchanger pipeline is provided with a heat exchanging medium flowmeter/flow control unit. The invention also provides a powder flow online detection method. The powder flow online detection system is good inn reliability and stability, good in sensitivity, simple in structure, convenient to operate and repair, small in investment and strong inn practicability; moreover, the flow pass of the powder is not changed in the detection process, the normal running of production devices is not influenced, and the powder flow online detection system is particularly suitable for detecting the flow of the powder in a high-temperature closed circulating system with low requirement on the precision.
Description
Technical field
The present invention relates to a kind of powder flow on-line detecting system and method, be mainly used in solving the online detection of powder flow in the industry such as chemical industry, oil refining, the powder material flow being specially adapted in high temperature, closed circulation system detects online, belongs to powder flow detection technique field.
Background technology
In the industrial processes such as chemical industry, oil refining, iron and steel, cement, be unable to do without fluid flow detection technique, for different material state, gas, fluid flow detection technique type are various and relatively ripe, mainly contain: the technology such as thermal mass flow meter, coriolis mass flowmeters, suspended body flowmeter, electromagnetic flowmeter, vortex shedding flow meter, orifice flowmeter, gear meter, all can find more suitable detection means according to different medium physical property and working condition.
But, for the flow detection of solid powder, conventional technology has belt conveyer scale, Weightlessness balance, rotor weigher, impulse flow meter and coriolis mass flowmeters, the mass rate of the common operating mode solid material of these technology energy direct-detections, meet the flow detection requirement of some occasions, but also had certain disadvantages.As just there is inadaptability in first three methods in detection principle, utilize the Weighing method of statical equilibrium to detect dynamic flow, the effect of dynamic force is inevitable, causes accuracy of detection poor, the volume of system own is large in addition, mechanical motion structure relative complex, poor stability; Though impact type flow detection mode is simple, quantitative test more complicated, the uncertain factor that affects accuracy of detection is many; Coriolis mass flowmeters utilize material from rotate detect wheel radial passage by time produce the effect of Coriolis counter torque to detecting wheel, the relational implementation being directly proportional to the instantaneous mass flow of material according to this moment detects the mass rate of material, though this technology has obvious principal advantage, do not need material to keep steady flow, there is good instantaneity, but high, expensive to Flow of Goods and Materials, sensor and testing agency's requirement thereof, limit its application.In addition, these powder flow detection techniques are all difficult to realize the online detection in real time of flow in the situation that not changing material stream passed pipe system.
Along with industrial expansion, new powder flow testing requirement is more and more, traditional detection technique or do not meet working condition requirement, or do not there is competitiveness in cost performance, as the circular flow of high temperature catalyst powder in airtight chemical plant installations detects online.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of online system and method detecting in real time of powder flow of realizing in the situation that not changing material stream passed pipe system, and system accuracy of detection is high, good stability, simple in structure, invests little, practical.
In order to solve the problems of the technologies described above, technical scheme of the present invention is to provide a kind of powder flow on-line detecting system, it is characterized in that: comprise jacket heat-exchanger, jacket heat-exchanger is provided with tube side and two passages of shell side, and shell side is with being located in tube side outside; The import and export of tube side is equipped with temperature element, and the import and export of shell side is also equipped with temperature element; Powder enters heat exchanger tube and goes out heat exchanger tube with powder and be connected with the import and export of tube side respectively, and heat transferring medium enters heat exchanger tube and goes out heat exchanger tube with heat transferring medium and be connected with the import and export of shell side respectively; Jacket heat-exchanger outside is provided with heat interchanger external thermal insulation, and heat transferring medium enters heat exchanger tube and is provided with heat transferring medium flow meter/flow controlling unit.
Preferably, whole described jacket heat-exchanger and enter heat exchanger tube, powder with powder and go out heat exchanger tube, heat transferring medium and enter mouth of pipe junction that heat exchanger tube, heat transferring medium go out heat exchanger tube all in described heat interchanger external thermal insulation coated.
Preferably, the specification of described tube side and described powder enter heat exchanger tube, powder to go out the specification of heat exchanger tube consistent.
Preferably, described temperature element is occasionally thermal resistance of thermoelectricity.
Preferably, described temperature element is provided with temperature display meter or the signal is far passed device.
The present invention also provides a kind of powder flow online test method, use above-mentioned powder flow on-line detecting system, it is characterized in that: powder flows in the tube side of jacket heat-exchanger, heat transferring medium flows in the shell side of jacket heat-exchanger, the temperature element that is arranged on tube side import and export and shell side import and export place detects the temperature of each mouth of pipe place material in real time, and heat transferring medium flow meter/flow controlling unit that heat transferring medium enters in heat exchanger tube detects heat transferring medium flow m in real time
be situated between, can obtain according to energy balance equation and heat balance equation:
Q
pipe=Q
shell
Q
pipe=c
powderm
powderΔ t
powder
Q
shell=c
be situated betweenm
be situated betweenΔ t
be situated between,
M
powder=(c
be situated betweenm
be situated betweenΔ t
be situated between)/(c
powderΔ t
powder)=m
be situated between(c
be situated between/ c
powder) (Δ t
be situated between/ Δ t
powder)
Wherein,
Q
pipethermal change in-tube side, Q
shellthermal change in-shell side;
C
powder-powder specific heat capacity, c
be situated between-heat transferring medium specific heat capacity;
M
powder-powder flow, m
be situated between-heat transferring medium flow;
Δ t
powderthe temperature difference of-powder turnover tube side, Δ t
be situated betweenthe temperature difference of-heat transferring medium turnover shell side:
The temperature difference t of powder turnover tube side
powderdifference by the temperature element reading that is arranged on tube side import and export can obtain, the temperature difference t of heat transferring medium turnover shell side
be situated betweendifference by the temperature element reading that is arranged on shell side import and export can obtain, and heat transferring medium and the powder specific heat capacity in turnover jacket heat-exchanger temperature range is known quantity, and the flow of powder can calculate.
Preferably, select the heat transferring medium suitable with powder specific heat capacity according to the physical property of described powder.
Preferably, for the flow detection of normal temperature powder, select the conduction oil of 100～200 ℃ as heat transferring medium; For the flow detection of high-temperature powder, select air at room temperature/nitrogen or low-pressure steam as heat transferring medium.
Powder flow on-line detecting system provided by the invention detects powder flow based on heat exchange principle, compared to existing technology, has following beneficial effect:
(1) principle is simple, the flow detection of powder is converted to the temperature detection of material turnover heat interchanger, for different operating condition design heat interchanger, selects heat transferring medium, has guaranteed the reliability, stability and the sensitivity that detect;
(2) system architecture is simple, only in normal conveyance conduit, is increasing a heat interchanger, and equipment investment is little, practical;
(3) testing process does not change the mobile latus rectum of powder, does not change the flow velocity of powder, can ignore on the impact of powder temperature, does not affect the normal operation of process units;
(4) there is no mechanical transmission mechanism, good stability, and easy and simple to handle, easy to maintenance;
(5) in system except temperature element directly contacts with medium, there is no the sensor of complicated circuit, be not subject to the restriction of medium temperature, be specially adapted to that high temperature, accuracy requirement are low, the detection of powder flow in closed circulation system.
Accompanying drawing explanation
Fig. 1 is powder flow on-line detecting system schematic diagram provided by the invention.
Embodiment
For the present invention is become apparent, hereby with a preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Powder flow on-line detecting system is based on heat exchange principle, a jacket heat-exchanger is set on powder conveying pipeline, the inner tube of heat interchanger is consistent with the pipeline specifications of the normal circulation of powder, powder material is walked tube side, heat transferring medium is walked shell side, and heat transferring medium and powder have a fixed difference difference and in the process by heat interchanger, have heat interchange to guarantee both.In the thermal environment of whole heat interchanger near adiabatic, the thermal loss of heat interchanger can be ignored compared with heat exchange amount between shell, is arranged on temperature element that heat exchanger tube pass and shell side import and export and detects in real time the turnover temperature of two kinds of materials.According to energy balance equation and heat balance equation:
Q
pipe=Q
shell
Q
pipe=c
powderm
powderΔ t
powder
Q
shell=c
be situated betweenm
be situated betweenΔ t
be situated between,
M
powder=(c
be situated betweenm
be situated betweenΔ t
be situated between)/(c
powderΔ t
powder)=m
be situated between(c
be situated between/ c
powder) (Δ t
be situated between/ Δ t
powder)
Wherein,
Q
pipethermal change in-tube side, Q
shellthermal change in-shell side;
C
the dregs of rice-powder specific heat capacity, c
be situated between-heat transferring medium specific heat capacity;
M
powder-powder flow, m
be situated between-heat transferring medium flow;
Δ t
powderthe temperature difference of-powder turnover tube side, Δ t
be situated betweenthe temperature difference of-heat transferring medium turnover shell side.
Known, heat transferring medium flow is fixing maybe can be surveyed, and manage the temperature difference of inside and outside two kinds of materials turnover heat interchanger and can survey, and heat transferring medium and powder be in the case of the specific heat within the scope of turnover heat exchange temperature can be looked into or measure in advance, and the flow of powder can calculate.
Based on above-mentioned principle, specifically introduce the structure of powder flow on-line detecting system provided by the invention below in conjunction with Fig. 1.
Described powder flow on-line detecting system comprises jacket heat-exchanger 1, and jacket heat-exchanger 1 has tube side 1-1 and two passages of shell side 1-2, and shell side 1-1 is with being located in tube side 1-2 outside.Tube side import is provided with temperature element (thermopair/thermal resistance) TE-A, and tube side outlet is provided with temperature element (thermopair/thermal resistance) TE-B; Shell side import is provided with temperature element (thermopair/thermal resistance) TE-C, and shell side outlet is provided with temperature element (thermopair/thermal resistance) TE-D.Powder enters heat exchanger tube 2 and goes out heat exchanger tube 3 with powder and be connected with tube side 1-1 import and export respectively, heat transferring medium enter heat exchanger tube 4 and heat transferring medium go out heat exchanger tube 5 respectively with shell side 1
-2 import and exports are connected.Jacket heat-exchanger 1 outside is provided with heat interchanger external thermal insulation 6, and heat transferring medium enters heat transferring medium flow meter/flow controlling unit 7 is housed in heat exchanger tube 4.
When the work of powder flow on-line detecting system, powder flows in the tube side 1-1 of jacket heat-exchanger, heat transferring medium flows in shell side 1-2, the specification of tube side 1-1 is consistent with the specification of powder conveying pipeline, be arranged on the temperature that the each mouth of pipe of the jacket heat-exchanger 1 temperature element TE-A of place, TE-B, TE-C, TE-D detect each mouth of pipe place material in real time, and show by the temperature display meter on it or the signal is far passed device TI-A, TI-B, TI-C, TI-D respectively.Whole jacket heat-exchanger 1 and enter heat exchanger tube 2, powder with powder and go out heat exchanger tube 3, heat transferring medium and enter heat exchanger tube 4, heat transferring medium and go out the turnover mouth of pipe that heat exchanger tube 5 is connected all in heat interchanger external thermal insulation 6 coated, good insulation insulation effect makes the thermal loss of system can ignore with respect to the heat exchange amount between powder and heat transferring medium.
Use before this powder flow on-line detecting system, need select the heat transferring medium that specific heat capacity is suitable according to the physical property of powder, be both specific heat capacities approximate 1, because the flow through temperature variation of heat interchanger of powder is little, can ignore on the impact of its specific heat, the flow through temperature difference of heat interchanger of heat transferring medium is large, its specific heat is had to certain influence, can inquire about experimental formula and calculate, in a word, the approximate fixed value of the specific heat ratio of heat transferring medium and powder or a known scope.Known according to flow detection principle formula, when specific heat ratio one timing of powder flow and two kinds of materials, the temperature difference of heat transferring medium turnover heat interchanger is larger with the ratio of the temperature difference of powder turnover heat interchanger, and heat transferring medium flow is less.For the flow detection of high-temperature powder, select air at room temperature/nitrogen or low-pressure steam as heat transferring medium, for the flow detection of normal temperature powder, select the conduction oil of 100～200 ℃ as heat transferring medium, Tube Sheet of Heat Exchanger internal-external temperature difference is large on the one hand, improve heat exchange efficiency from dynamics, on the other hand, make heat transferring medium have larger temperature variation space, so not only improve the reliability of flow quantity detecting system, stability, sensitivity, and reduce the flow of heat transferring medium, the discharge of waste gas or the operating load of conduction oil are reduced, improve the exploitativeness of system.
In commercial production, the signal that powder flow detects is usually used in conjunction with the variable valve such as material level control, flow control.For this powder flow on-line detecting system, in practice process, the flow velocity of fixing heat transferring medium, each temperature detection signal and powder flow in flow quantity detecting system can be set up to corresponding relation, temperature detection signal directly feeds back to the variable valve such as material level control, flow control after by computer control system computing, application is convenient, simple to operate.
In system, the control mode of heat transferring medium flow is various, if heat transferring medium is gaseous state, the mode control flow such as gas mass flow controller, flowmeter+regulating and controlling valve can be selected, if heat transferring medium is liquid, the volume pump such as membrane pump, gear-type pump control flow can be selected.
Claims (8)
1. a powder flow on-line detecting system, it is characterized in that: comprise jacket heat-exchanger (1), jacket heat-exchanger (1) is provided with tube side (1-1) and two passages of shell side (1-2), and shell side (1-1) is with being located in tube side (1-2) outside; The import and export of tube side (1-1) is equipped with temperature element, and the import and export of shell side (1-2) is also equipped with temperature element; Powder enters heat exchanger tube (2) and goes out heat exchanger tube (3) with powder and be connected with the import and export of tube side (1-1) respectively, and heat transferring medium enters heat exchanger tube (4) and goes out heat exchanger tube (5) with heat transferring medium and be connected with the import and export of shell side (1-2) respectively; Jacket heat-exchanger (1) outside is provided with heat interchanger external thermal insulation (6), and heat transferring medium enters heat exchanger tube (4) and is provided with heat transferring medium flow meter/flow controlling unit (7).
2. a kind of powder flow on-line detecting system as claimed in claim 1, is characterized in that: whole described jacket heat-exchanger (1) and enter heat exchanger tube (2), powder with powder and go out heat exchanger tube (3), heat transferring medium and enter mouth of pipe junction that heat exchanger tube (4), heat transferring medium go out heat exchanger tube (5) all in described heat interchanger external thermal insulation (6) coated.
3. a kind of powder flow on-line detecting system as claimed in claim 1, is characterized in that: the specification of described tube side (1-1) and described powder enter heat exchanger tube (2), powder to go out the specification of heat exchanger tube (3) consistent.
4. a kind of powder flow on-line detecting system as claimed in claim 1, is characterized in that: described temperature element is occasionally thermal resistance of thermoelectricity.
5. a kind of powder flow on-line detecting system as claimed in claim 1 or 2, is characterized in that: described temperature element is provided with temperature display meter or the signal is far passed device.
6. a powder flow online test method, use powder flow on-line detecting system as claimed in claim 1, it is characterized in that: powder flows in the tube side (1-1) of jacket heat-exchanger (1), heat transferring medium flows in the shell side (1-2) of jacket heat-exchanger (1), being arranged on tube side (1-1) enters, outlet and shell side (1-2) enter, the temperature element in exit detects the temperature of each mouth of pipe place material in real time, heat transferring medium flow meter/flow controlling unit (7) that heat transferring medium enters in heat exchanger tube (4) detects heat transferring medium flow m in real time
be situated between, can obtain according to energy balance equation and heat balance equation:
Q
pipe=Q
shell
Q
pipe=c
powderm
powderΔ t
powder
Q
shell=c
be situated betweenm
be situated betweenΔ t
be situated between,
M
powder=(c
be situated betweenm
be situated betweenΔ t
be situated between)/(c
powderΔ t
powder)=m
be situated between(c
be situated between/ c
powder) (Δ t
be situated between/ Δ t
powder)
Wherein,
Q
pipethermal change in-tube side, Q
shellthermal change in-shell side;
C
powder-powder specific heat capacity, c
be situated between-heat transferring medium specific heat capacity;
M
powder-powder flow, m
be situated between-heat transferring medium flow:
Δ t
powderthe temperature difference of-powder turnover tube side, Δ t
be situated betweenthe temperature difference of-heat transferring medium turnover shell side:
The temperature difference t of powder turnover tube side
powderdifference by the temperature element reading that is arranged on tube side (1-1) import and export can obtain, the temperature difference t of heat transferring medium turnover shell side
be situated betweendifference by the temperature element reading that is arranged on shell side (1-2) import and export can obtain, and heat transferring medium and the powder specific heat capacity in turnover jacket heat-exchanger (1) temperature range is known quantity, and the flow of powder can calculate.
7. a kind of powder flow online test method as claimed in claim 6, is characterized in that: select the heat transferring medium suitable with powder specific heat capacity according to the physical property of described powder.
8. a kind of powder flow online test method as claimed in claim 6, is characterized in that: for the flow detection of normal temperature powder, select the conduction oil of 100～200 ℃ as heat transferring medium; For the flow detection of high-temperature powder, select air at room temperature/nitrogen or low-pressure steam as heat transferring medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410105714.9A CN103868558B (en) | 2014-03-20 | 2014-03-20 | A kind of powder flow on-line detecting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410105714.9A CN103868558B (en) | 2014-03-20 | 2014-03-20 | A kind of powder flow on-line detecting system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103868558A true CN103868558A (en) | 2014-06-18 |
| CN103868558B CN103868558B (en) | 2017-01-04 |
Family
ID=50907336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410105714.9A Active CN103868558B (en) | 2014-03-20 | 2014-03-20 | A kind of powder flow on-line detecting system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103868558B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568486A (en) * | 2016-08-26 | 2017-04-19 | 江苏伟屹电子有限公司 | Whole jacketed vortex flowing meter |
| CN107870012A (en) * | 2017-11-08 | 2018-04-03 | 西安西热锅炉环保工程有限公司 | The device and method of rate-of flow under a kind of heat balance method of test complex environment |
| CN112097862A (en) * | 2020-07-27 | 2020-12-18 | 华电(印尼)玻雅发电公司 | Powder flow on-line monitoring system |
| CN115524129A (en) * | 2022-09-13 | 2022-12-27 | 中国航发沈阳发动机研究所 | Method for determining flow of lubricating oil of aircraft engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3027764A (en) * | 1957-01-02 | 1962-04-03 | L Air Liquide Sa Pour L Etudes | Apparatus for measuring large fluid flows |
| JPS62293165A (en) * | 1986-06-13 | 1987-12-19 | Hitachi Ltd | Simultaneous measuring method for temperature and velocity of fluid |
| CN102261968A (en) * | 2011-06-14 | 2011-11-30 | 南京工业大学 | Method and device for predicting node temperature of shell and tube heat exchanger |
| CN202133426U (en) * | 2011-06-07 | 2012-02-01 | 上海锅炉厂有限公司 | Measuring device for ash flow of circulating fluidized bed furnace |
| CN203798393U (en) * | 2014-03-20 | 2014-08-27 | 迈瑞尔实验设备（上海）有限公司 | Online powder flow detection system |
-
2014
- 2014-03-20 CN CN201410105714.9A patent/CN103868558B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3027764A (en) * | 1957-01-02 | 1962-04-03 | L Air Liquide Sa Pour L Etudes | Apparatus for measuring large fluid flows |
| JPS62293165A (en) * | 1986-06-13 | 1987-12-19 | Hitachi Ltd | Simultaneous measuring method for temperature and velocity of fluid |
| CN202133426U (en) * | 2011-06-07 | 2012-02-01 | 上海锅炉厂有限公司 | Measuring device for ash flow of circulating fluidized bed furnace |
| CN102261968A (en) * | 2011-06-14 | 2011-11-30 | 南京工业大学 | Method and device for predicting node temperature of shell and tube heat exchanger |
| CN203798393U (en) * | 2014-03-20 | 2014-08-27 | 迈瑞尔实验设备（上海）有限公司 | Online powder flow detection system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106568486A (en) * | 2016-08-26 | 2017-04-19 | 江苏伟屹电子有限公司 | Whole jacketed vortex flowing meter |
| CN107870012A (en) * | 2017-11-08 | 2018-04-03 | 西安西热锅炉环保工程有限公司 | The device and method of rate-of flow under a kind of heat balance method of test complex environment |
| CN112097862A (en) * | 2020-07-27 | 2020-12-18 | 华电(印尼)玻雅发电公司 | Powder flow on-line monitoring system |
| CN115524129A (en) * | 2022-09-13 | 2022-12-27 | 中国航发沈阳发动机研究所 | Method for determining flow of lubricating oil of aircraft engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103868558B (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liptak | Flow measurement | |
| CN103292849B (en) | The gas phase flow rate of moisture and the device and method of liquid phase flow in a kind of on-line measurement horizontal tube | |
| WO2013102312A1 (en) | Steam flow metering device and metering method therefor | |
| CN103868558A (en) | Powder flow online detection system and method | |
| CN104897221B (en) | The solid flow continuous measurement system and measuring method of process of pneumatic transmission | |
| CN107976223A (en) | A kind of high accuracy leakage amount detector | |
| Hua et al. | Wet gas meter based on the vortex precession frequency and differential pressure combination of swirlmeter | |
| CN104897222B (en) | The solid flow measuring system and measuring method of During Dense Phase Pneumatic Transportation | |
| CN106595755A (en) | Large-scale petrochemical device air cooler energy efficiency evaluation on-line monitoring system and method | |
| CN102230817B (en) | Recycled two-phase flow flowmeter calibrating platform of wet steam | |
| CN102346058B (en) | Model method for measuring flow rate of air-assisted liquid by Coriolis mass flowmeter (CMF) | |
| CN104515562A (en) | Multiphase flow micro-differential pressure measuring device and flow metering method | |
| CN203798393U (en) | Online powder flow detection system | |
| CN204373715U (en) | A kind of polyphasic flow micro-pressure-difference measurement mechanism | |
| CN107367305A (en) | A kind of moment of torsion flowmeter and its method of work | |
| CN103245387A (en) | Small-liquid-amount gas-liquid two-phase oil well meter | |
| CN203688009U (en) | Heat absorbing piece of Coriolis mass flow meter | |
| CN202024808U (en) | Recovery type wet steam two-phase flow flowmeter calibration table | |
| CN203745020U (en) | Solid-phase flow rate continuous measurement system of pneumatic transportation process | |
| CN203745019U (en) | Solid-phase flow rate measuring system of dense-phase pneumatic transportation process | |
| CN204439149U (en) | Concentrated phase fine coal mass flowmeter | |
| CN105136342A (en) | System and method for improving measurement precision of heat exchange amount of heat exchanger under temperature differential condition | |
| CN207832287U (en) | A kind of detection device for fluid flowmeter | |
| CN106125775A (en) | Based on devices and methods therefor steam flow being evaporated, measure and controlling | |
| CN104280076A (en) | High-precision large-diameter vortex flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |