CN214252035U - Heat exchange equipment dirt growth real-time supervision device - Google Patents
Heat exchange equipment dirt growth real-time supervision device Download PDFInfo
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- CN214252035U CN214252035U CN202022935576.0U CN202022935576U CN214252035U CN 214252035 U CN214252035 U CN 214252035U CN 202022935576 U CN202022935576 U CN 202022935576U CN 214252035 U CN214252035 U CN 214252035U
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Abstract
The utility model relates to a dirt characteristic monitoring technology field specifically is a heat transfer equipment dirt growth real-time supervision device, including the miniflow way subassembly, the miniflow way subassembly is including board I, board II, board III, board IV and board V, and board I, board II, board III, board IV and board V are connected from the top down once, are equipped with the window on board I, and board III is equipped with experimental fluid runner, is equipped with the hot-fluid runner on board V, and the flow direction of experimental fluid in the experimental fluid runner is the same with the flow direction of hot-fluid in the hot-fluid runner, the utility model discloses do not take out the test panel during the experiment, do not cause the change of dirt growth environment, guarantee that what each measurement was the same dirt individual; external force fields such as ultrasound, electric fields, magnetic fields and the like are not introduced, so that the influence of the external force fields on the growth of the dirt is avoided, and the growth of the single dirt according to the original growth path is ensured; and the real-time monitoring of the growth of a plurality of groups of single dirt is completed under the condition of not influencing the growth microenvironment of the dirt.
Description
Technical Field
The utility model relates to a dirt characteristic monitoring technology field specifically is a heat exchange equipment dirt growth real-time supervision device.
Background
Fouling is an extremely common phenomenon that is widely present in nature, daily life, and various industrial processes. For a long time, people are troubled by the problem of scaling of heat exchange equipment, and more than 90 percent of heat exchange equipment is investigated to have the problem of scaling in different degrees. Dirt is a poor conductor of heat, typically having thermal conductivity only 1/30-1/50 of carbon steel. Once fouling has formed on the heat exchange surface, the thermal resistance of the heat transfer surface increases significantly and its heat transfer performance is severely deteriorated. Deposition of dirt on the pipe will also reduce the flow area, increase the flow resistance, force the fluid transport device to increase power, and thus increase energy consumption. The deposition of dirt often causes local overheating or overtemperature of equipment to cause the mechanical performance to be reduced, and accidents such as bulging, tube bursting and the like are caused. Dirt often causes under-dirt corrosion and hot spot corrosion of metal heat exchange surfaces, and the safe operation of heat exchange equipment is seriously threatened. The presence of fouling increases both the initial investment and the cost of operating maintenance. In conclusion, the dirt exists widely in the heat exchange equipment and is extremely harmful, so that the inhibition and elimination of the dirt by researching the growth rule of the dirt crystal have important theoretical significance and practical value.
The fouling of the heat exchange equipment is not only a process of energy transfer, momentum transfer and mass transfer, but also often involves chemical reactions and various physical and chemical processes, which makes the research on the fouling of the heat exchange equipment difficult and slow. The earliest observations and research reports of fouling occurred in the twenties of the last century, but until the early seventies of the last century, fouling was still considered to be an "unsolved major problem in heat transfer". Epstein made a special report of fouling problems at the sixth international heat transfer conference, and a comprehensive systematic review of more than 170 fouling research articles between 1960-: crystalline scale, particulate scale, chemically reactive scale, corrosive scale, microbial scale, and coagulated scale, and the deposition-re-entrainment model describing scale is repeated. Basim et al found that: regardless of the mechanism by which fouling forms, fouling thermal resistance is affected by the characteristics of the growth of the fouling and the characteristics of the fouling layer. Therefore, the method can observe the growth condition of a single dirt and the characteristics of the dirt layer in real time under different working conditions, and is very effective for researching the formation mechanism and the inhibition method of the dirt.
In the prior art, a test board or a test tube needs to be taken down to carry out weighing and appearance electron microscope analysis, dirt on a heat exchange surface can die after leaving a solution environment, the growth conditions of different dirt at different moments can be tested by the existing system, the real-time growth condition of single dirt cannot be tested, and the obtained experimental result cannot be used for fine research on the growth of the dirt.
In the prior art, the rough appearance and the growth state of the dirt at different moments are obtained by an ultrasonic method, but the growth state and the growth environment of the single dirt are damaged by using an ultrasonic device, so that the original dirt can not grow according to the original growth path, and the real-time appearance and the growth characteristic of the single dirt can not be obtained by the ultrasonic device.
At present, no device for monitoring the growth characteristics and the appearance of a single dirt in real time under the condition of not damaging the growth environment of the dirt exists.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a heat transfer equipment dirt growth real-time supervision device can monitor growth characteristic, crystal size and the dirt layer characteristics like different grade type dirt such as calcium carbonate dirt, calcium sulfate dirt or magnesium hydrate dirt at the different positions of pipeline and the different stages of dirt growth.
In order to solve the problems, the novel heat exchange equipment dirt growth real-time monitoring device comprises a micro flow channel assembly, the micro flow channel assembly comprises a plate I, a plate II, a plate III, a plate IV and a plate V, the plate I, the plate II, the plate III, the plate IV and the plate V are connected from top to bottom, a window is arranged on the plate I, the plate III is provided with an experimental fluid flow channel, a hot fluid flow channel is arranged on the plate V, the experimental fluid flow channel is arranged right above the hot fluid flow channel, the window is arranged right above the experimental fluid flow channel, one side of the experimental fluid flow channel is an experimental fluid inlet, the other side of the experimental fluid flow channel is an experimental fluid outlet, one side of the hot fluid flow channel is a hot fluid inlet, the other side of the hot fluid flow channel is a hot fluid outlet, and the flow direction of the experimental fluid in the experimental fluid flow channel is the same as the flow direction of the hot fluid in the hot fluid flow channel.
Furthermore, a plurality of windows are arranged on the plate I and are linearly arranged, the distance between the edge of the window close to the experimental fluid inlet and the experimental fluid inlet is larger than 10 times of the section diameter of the experimental fluid flow channel, and the distance between the edge of the window close to the experimental fluid outlet and the experimental fluid outlet is larger than 10 times of the section diameter of the experimental fluid flow channel.
Furthermore, the plate I is made of a metal plate and is light-proof; the plate II is made of transparent organic glass; the plate III is made of polypropylene or polytetrafluoroethylene; the plate IV is a test plate; the material of the plate V is polytetrafluoroethylene.
Furthermore, four corners of the plate I, the plate II, the plate III, the plate IV and the plate V are provided with fixing holes, bolts are connected in the fixing holes, and the plate I, the plate II, the plate III, the plate IV and the plate V are connected together through the bolts and the nuts in the fixing holes; and glass cement is coated among the plate I, the plate II, the plate III, the plate IV and the plate V.
Further, still including experiment fluid supply system, experiment fluid supply system is including anion water tank and cation water tank, cation water tank entry has the pressure feed pump through the pipe connection, the pressure feed pump export has the flowmeter through the pipe connection, the flowmeter export has the ion heater through the pipe connection, anion water tank export has the pressure feed pump through the pipe connection, the pressure feed pump export has the flowmeter through the pipe connection, the export of heater and the export of the flowmeter that anion water tank is connected have the blender through the pipe connection, the blender export passes through the pipe connection on experiment fluid entry, be equipped with temperature sensor on the pipeline of blender export.
Furthermore, the experimental fluid outlet and the hot fluid outlet are connected with temperature sensors.
Further, the anion in the experimental fluid is CO3 2-And SO4 2-The cation in the experimental fluid is Ca2+。
Further, still including hot water supply system, hot water supply system has the pump including running water entry, running water entry through pipe connection, and the pump export has the flowmeter through pipe connection, and the flowmeter has electric heater through pipe connection, and electric heater has catch water through pipe connection, and the catch water export passes through pipe connection on the hot-fluid entry, is equipped with temperature sensor on the pipeline of catch water export
Further, still including the formation of image monitoring system, the formation of image monitoring system is including three mesh stereomicroscope, camera, data record appearance and computer, and three mesh stereomicroscope establish in the window top, and the window top still is equipped with the light source, and two eyepieces in the three mesh stereomicroscope are used for using the naked eye to observe dirt morphology characteristic, and another eyepiece in the three mesh stereomicroscope is connected with the camera, camera and data record appearance data connection, data record appearance and computer data connection.
Furthermore, the imaging monitoring system also comprises a digital camera, and one ocular of the trinocular stereoscopic microscope is connected with the digital camera.
The utility model has the advantages that: the device comprises a micro-channel assembly, wherein the micro-channel assembly comprises a plate I, a plate II, a plate III, a plate IV and a plate V, the plate I, the plate II, the plate III, the plate IV and the plate V are connected from top to bottom, a window is arranged on the plate I, the plate III is provided with an experimental fluid flow channel, a hot fluid flow channel is arranged on the plate V, and the flow direction of the experimental fluid in the experimental fluid flow channel is the same as that of the hot fluid in the hot fluid flow channel; external force fields such as ultrasound, electric fields, magnetic fields and the like are not introduced, so that the influence of the external force fields on the growth of the dirt is avoided, and the growth of the single dirt according to the original growth path is ensured; and the real-time monitoring of the growth of a plurality of groups of single dirt is completed under the condition of not influencing the growth microenvironment of the dirt.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the microchannel module of the present invention;
fig. 3 is a cross-sectional view taken along line a-a of fig. 2 in accordance with the present invention;
fig. 4 is a cross-sectional view taken along line B-B of fig. 2 in accordance with the present invention;
fig. 5 is a structural composition diagram of the imaging system of the present invention.
In the figure: 1. an anionic water tank; 2. a cationic water tank; 3. a pressure supply pump; 5. a flow meter; 7. a mixer; 8. an ion heater; 9. a tap water inlet; 11. an electric heater; 12. a steam-water separator; 13. a temperature sensor; 14. an experimental fluid inlet; 15. a hot fluid inlet; 16. a window; 17. a microchannel assembly; 18. an imaging monitoring system; 19. a light source; 20. a fixing hole; 21. a plate I; 22. a plate II; 23. a plate III; 24. a plate IV; 25. a panel V; 26. an experimental fluid flow channel; 27. a hot fluid flow path.
Detailed Description
As shown in FIGS. 1-5, the device for monitoring the growth of fouling in heat exchange equipment comprises a micro flow channel assembly 17, wherein the micro flow channel assembly 17 comprises a plate I21, a plate II 22, a plate III 23, a plate IV 24, a plate V25, a plate I21, plate II 22, plate III 23, plate IV 24 and plate V25 are connected from top to bottom, be equipped with window 16 on plate I21, plate III 23 is equipped with experiment fluid runner 26, be equipped with hot-fluid runner 27 on plate V25, experiment fluid runner 26 is established directly over hot-fluid runner 27, window 16 is established directly over experiment fluid runner 26, experiment fluid runner 26 one side is experiment fluid inlet 14, experiment fluid runner 26 opposite side is the experiment fluid export, hot-fluid runner 27 one side is hot-fluid inlet 15, hot-fluid runner 27 opposite side is the hot-fluid export, the flow direction of the experiment fluid in experiment fluid runner 26 is the same with the hot-fluid flow direction in hot-fluid runner 27.
Further, a plurality of the windows 16 are arranged on the plate i 21, the windows 16 are linearly arranged, the distance between the edge of the window 16 close to the experimental fluid inlet 14 and the experimental fluid inlet 14 is greater than 10 times of the cross-sectional diameter of the experimental fluid channel 26, and the distance between the edge of the window 16 close to the experimental fluid outlet and the experimental fluid outlet is greater than 10 times of the cross-sectional diameter of the experimental fluid channel 26.
Furthermore, the plate I21 is made of a metal plate and is light-proof; the plate II 22 is made of transparent organic glass; the plate III 23 is made of polypropylene or polytetrafluoroethylene; the plate IV 24 is a test plate; the material of the plate V25 is polytetrafluoroethylene.
Furthermore, four corners of the plate I21, the plate II 22, the plate III 23, the plate IV 24 and the plate V25 are all provided with fixing holes 20, bolts are connected in the fixing holes 20, and the plate I21, the plate II 22, the plate III 23, the plate IV 24 and the plate V25 are connected together through the bolts and nuts in the fixing holes 20; glass cement is coated among the plate I21, the plate II 22, the plate III 23, the plate IV 24 and the plate V25.
Further, still including experiment fluid supply system, experiment fluid supply system is including anion water tank 1 and cation water tank 2, there is pressure feed pump 3 cation water tank 2 entry through the pipe connection, there is flowmeter 5 for the 3 export of pressure feed pump through the pipe connection, there is ion heater 8 flowmeter 5 export through the pipe connection, there is pressure feed pump 3 anion water tank 1 export through the pipe connection, there is flowmeter 5 for the 3 export of pressure feed pump through the pipe connection, there is blender 7 the export of the flowmeter 5 that heater 8 export and anion water tank 1 are connected through the pipe connection, blender 7 export is on experiment fluid entry 14 through the pipe connection, be equipped with temperature sensor 13 on the pipeline of blender 7 exports.
Furthermore, the experimental fluid outlet and the hot fluid outlet are connected with a temperature sensor 13.
Further, the anion in the experimental fluid is CO3 2-And SO4 2-The cation in the experimental fluid is Ca2+。
Further, still including hot water supply system, hot water supply system is including running water entry 9, running water entry 9 has the pump through pipe connection, the pump export has flowmeter 5 through pipe connection, flowmeter 5 has electric heater 11 through pipe exit linkage, electric heater 11 has catch water 12 through pipe exit linkage, catch water 12 export is through pipe connection on hot-fluid entry 15, be equipped with temperature sensor 13 on the pipeline of catch water 12 export
Further, still including the imaging monitoring system, the imaging monitoring system is including three mesh stereomicroscope, the camera, data record appearance and computer, and three mesh stereomicroscope establish in window 16 top, and window 16 top still is equipped with light source 19, and two eyepieces in the three mesh stereomicroscope are used for using the naked eye to observe dirt morphology characteristic, and another eyepiece in the three mesh stereomicroscope is connected with the camera, camera and data record appearance data connection, data record appearance and computer data connection.
Furthermore, the imaging monitoring system also comprises a digital camera, and one ocular of the trinocular stereoscopic microscope is connected with the digital camera.
The micro flow channel assembly 17 considers the factors of pressure drop, temperature, position of a window, access and exit effects, heat preservation, light transmittance and the like, the total size of the plate IV 24 as a test plate in the embodiment is 30mm multiplied by 800mm, the size can be determined according to the actual working condition in actual use, and the four corners of the plate I21, the plate II 22, the plate III 23, the plate IV 24 and the plate V25 are all provided with fixing holes 20 and are fixed through bolts and nuts. In order to observe the growth characteristics of dirt at different positions of the test board, the front end, the middle end and the rear end of the board I21 are respectively provided with a window 16, the windows 16 can be distributed with a plurality of windows according to experimental requirements, in the embodiment, the size of each window 16 is 8mm multiplied by 8mm, the size of each window 16 can be determined according to the type of dirt crystals, in order to reduce the influence of the inlet and outlet effect, the distance between the front end and the rear end of each window from an inlet and an outlet is 60mm and is far more than ten times of the diameter of a flow channel, and the influence of the inlet and outlet effect can be ignored. In the embodiment, the plate I21 is made of 304 stainless steel and has the thickness of 1.5 mm; the plate II 22 is made of transparent organic glass and is 1mm thick; the plate III 23 is made of polypropylene or polytetrafluoroethylene, the thickness is 1.5mm, the section of the experimental fluid flow channel 26 is rectangular, and the size is 1.5mm multiplied by 6.5 mm; the material of the plate V25 is polytetrafluoroethylene, and the section of the hot fluid flow channel 27 is rectangular, and the size is 5mm multiplied by 8 mm.
The cation provided by the cation water tank 2 is heated and then mixed with the anion provided by the anion water tank 1 through the mixer 7 to obtain an experimental fluid, the flow rate of the experimental fluid can be adjusted through the flowmeter 5, and the liquid inlet amount can be adjusted and controlled at will through the two pressure supply pumps 3; the ion heater 8 is used for heating the cation solution to prevent precipitates from appearing before the mixed anions and cations enter the test flow channel; the temperature sensor 13 is used for monitoring the inlet and outlet temperatures of the two flow channels in real time, and the temperature is a determining factor of the growth speed of dirt and is an important basis for data analysis.
The hot water supply system heats tap water to a certain temperature, the temperature can be adjusted to 40-95 ℃, and the steam-water separator 12 can separate bubbles generated in the heating process of the electric heater from the hot water. The flow rate of the hot water is adjusted by a flow meter, and the flow rate of the hot water can be adjusted in a large range, generally 0.1m/s-5 m/s, because the pressure of tap water is high and adjustable.
The imaging monitoring system is a main component for observing the growth of the dirt and recording the characteristics of the relevant dirt, and the resolution, recording time, photo quality, data processing and storing functions of the system relate to the accuracy and integrity of the dynamic monitoring of the growth of the dirt. The imaging system in the embodiment mainly comprises a trinocular stereomicroscope of Phoenix optics group Limited, the model of which is XTL-165, a CCD camera of the Phoenix optics group Limited, the model of which is MC-D500U, a Nikong D5600 digital camera, and a data recorder of Shenzhen Shangsheng Changchang technology industry Limited, the model of which is DT-176CV 2. The working distance of the three-eye stereomicroscope can be adjusted, the magnification can reach 250 times, the two eyepieces are used for observing the appearance characteristics of dirt through naked eyes, the other eyepiece is used for being connected with a CCD camera to record the growth characteristics of the dirt in a real-time dynamic mode, the other end of the camera is connected with a data recorder, the data recorder guides data into a computer, and the appearance characteristics of the dirt can be observed through the computer. In addition, the ocular can be connected with a digital camera to shoot when a high-definition picture of the dirt appearance is needed. The obtained high-definition picture can be used for qualitatively analyzing the growth characteristics of the dirt, and the specific quality of the dirt can be obtained by quantitatively processing the picture. In addition, the equipment of the imaging monitoring system can be upgraded along with the development of the microscope, and images with higher resolution can be obtained.
The light source 19 is a non-shadow light source for illuminating the viewing window and achieving a good imaging effect of the microscope.
Claims (10)
1. The utility model provides a heat transfer equipment dirt growth real-time supervision device which characterized in that: the device comprises a micro-channel component (17), wherein the micro-channel component (17) comprises a plate I (21), a plate II (22), a plate III (23), a plate IV (24) and a plate V (25), the plate I (21), the plate II (22), the plate III (23), the plate IV (24) and the plate V (25) are connected from top to bottom, a window (16) is arranged on the plate I (21), an experimental fluid channel (26) is arranged on the plate III (23), a hot fluid channel (27) is arranged on the plate V (25), the experimental fluid channel (26) is arranged right above the hot fluid channel (27), the window (16) is arranged right above the experimental fluid channel (26), an experimental fluid inlet (14) is arranged on one side of the experimental fluid channel (26), an experimental fluid outlet is arranged on the other side of the experimental fluid channel (26), a hot fluid inlet (15) is arranged on one side of the hot fluid channel (27), and a hot fluid outlet is arranged on the other side of the hot fluid channel (27), the flow direction of the test fluid in the test fluid flow channel (26) is the same as the flow direction of the hot fluid in the hot fluid flow channel (27).
2. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 1, characterized in that: the test fluid flow channel is characterized in that a plurality of windows (16) are arranged on the plate I (21), the windows (16) are linearly arranged, the distance between the edge of the window (16) close to the test fluid inlet (14) and the test fluid inlet (14) is larger than 10 times of the section diameter of the test fluid flow channel (26), and the distance between the edge of the window (16) close to the test fluid outlet and the test fluid outlet is larger than 10 times of the section diameter of the test fluid flow channel (26).
3. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 1, characterized in that: the plate I (21) is made of a metal plate and is light-proof; the plate II (22) is made of transparent organic glass; the plate III (23) is made of polypropylene or polytetrafluoroethylene; the plate IV (24) is a test plate; the material of the plate V (25) is polytetrafluoroethylene.
4. The device for monitoring the fouling growth of the heat exchange equipment in real time according to any one of claims 1 to 3, characterized in that: four corners of the plate I (21), the plate II (22), the plate III (23), the plate IV (24) and the plate V (25) are respectively provided with a fixing hole (20), bolts are connected in the fixing holes (20), and the plate I (21), the plate II (22), the plate III (23), the plate IV (24) and the plate V (25) are connected together through the bolts and nuts in the fixing holes (20); glass cement is also coated among the plate I (21), the plate II (22), the plate III (23), the plate IV (24) and the plate V (25).
5. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 4, characterized in that: still including experiment fluid supply system, experiment fluid supply system is including anion water tank (1) and cation water tank (2), there is pressure feed pump (3) cation water tank (2) entry through the pipe connection, there is flowmeter (5) pressure feed pump (3) export through the pipe connection, there is ion heater (8) flowmeter (5) export through the pipe connection, there is pressure feed pump (3) anion water tank (1) export through the pipe connection, there is flowmeter (5) pressure feed pump (3) export through the pipe connection, there is blender (7) outlet of flowmeter (5) that the export of heater (8) and anion water tank (1) are connected through the pipe connection, blender (7) export is on experiment fluid entry (14) through the pipe connection, be equipped with temperature sensor (13) on the pipeline of blender (7) export.
6. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 5, is characterized in that: and the experimental fluid outlet and the hot fluid outlet are connected with temperature sensors (13).
7. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 5, is characterized in that: the anion in the experimental fluid is CO3 2-And SO4 2-The cation in the experimental fluid is Ca2+。
8. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 5, is characterized in that: still including hot water supply system, hot water supply system is including running water entry (9), running water entry (9) have the pump through pipe connection, the pump export has flowmeter (5) through pipe connection, flowmeter (5) have electric heater (11) through pipe exit linkage, electric heater (11) have catch water (12) through pipe exit linkage, catch water (12) export passes through pipe connection on hot-fluid entry (15), be equipped with temperature sensor (13) on the pipeline of catch water (12) export.
9. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 7, characterized in that: still including the imaging monitoring system, the imaging monitoring system is including the trinocular stereoscopic microscope, the camera, data record appearance and computer, the trinocular stereoscopic microscope is established in window (16) top, window (16) top still is equipped with light source (19), two eyepieces in the trinocular stereoscopic microscope are used for using the naked eye to observe dirt morphology characteristic, another eyepiece in the trinocular stereoscopic microscope is connected with the camera, camera and data record appearance data connection, data record appearance and computer data connection.
10. The device for monitoring the fouling growth of the heat exchange equipment in real time according to claim 9, characterized in that: the imaging monitoring system also comprises a digital camera, and one ocular of the trinocular stereoscopic microscope is connected with the digital camera.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115127848A (en) * | 2022-08-31 | 2022-09-30 | 山东汇通工业制造有限公司 | Heat exchanger pipeline blockage detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115127848A (en) * | 2022-08-31 | 2022-09-30 | 山东汇通工业制造有限公司 | Heat exchanger pipeline blockage detection method |
| CN115127848B (en) * | 2022-08-31 | 2022-11-11 | 山东汇通工业制造有限公司 | Heat exchanger pipeline blockage detection method |
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