CN113154803A - Microwave hot air drying device and drying method - Google Patents
Microwave hot air drying device and drying method Download PDFInfo
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- CN113154803A CN113154803A CN202110255411.5A CN202110255411A CN113154803A CN 113154803 A CN113154803 A CN 113154803A CN 202110255411 A CN202110255411 A CN 202110255411A CN 113154803 A CN113154803 A CN 113154803A
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- 238000001035 drying Methods 0.000 title claims abstract description 122
- 238000007602 hot air drying Methods 0.000 title claims abstract description 40
- 230000001105 regulatory effect Effects 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000009423 ventilation Methods 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 abstract description 36
- 239000000835 fiber Substances 0.000 abstract description 13
- 239000008280 blood Substances 0.000 description 12
- 210000004369 blood Anatomy 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000012510 hollow fiber Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 4
- 239000008215 water for injection Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 208000037157 Azotemia Diseases 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 239000003053 toxin Substances 0.000 description 2
- 231100000765 toxin Toxicity 0.000 description 2
- 208000009852 uremia Diseases 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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Abstract
本发明提供了一种微波热风干燥装置及干燥方法，包括微波干燥模块，包括用于干燥透析器的干燥室和微波导入组件，干燥室包括进气管路和排气管路，干燥室内安装有微波导入组件；压力调节模块，包括第一调压阀和用于测量气压的反馈气路，第一调压阀连接反馈气路；冷热风切换模块，包括换向阀和加热器，换向阀一端与第一调压阀连接；加热器包括进气端和出气端，加热器的进气端与换向阀连接；和气体分配器，气体分配器一端通过进气管路连接干燥室，气体分配器另一端连接有反馈气路、换向阀和加热器的出气端。本发明提供的微波热风干燥装置解决了现有透析器干燥过程中干燥速度慢、纤维膜束易破损的问题。
The invention provides a microwave hot air drying device and a drying method, comprising a microwave drying module, a drying chamber for drying a dialyzer and a microwave introduction assembly, the drying chamber includes an air inlet pipeline and an exhaust pipeline, and a microwave is installed in the drying chamber Introductory assembly; pressure regulating module, including a first pressure regulating valve and a feedback gas circuit for measuring air pressure, the first pressure regulating valve is connected to the feedback gas circuit; cold and hot air switching module, including reversing valve and heater, reversing valve One end is connected with the first pressure regulating valve; the heater includes an air inlet end and an air outlet end, and the air inlet end of the heater is connected with the reversing valve; The other end of the heater is connected with the feedback air circuit, the reversing valve and the outlet end of the heater. The microwave hot air drying device provided by the invention solves the problems of slow drying speed and easy damage of fiber membrane bundles in the drying process of the existing dialyzer.
Description
Technical Field
The invention relates to the field of dialyzer production, in particular to a microwave hot air drying device and a drying method.
Background
The dialyzer consists of a membrane bundle, a shell, a sealing layer and an end cover. Wherein the membrane bundle is composed of a plurality of hollow fibers, and a plurality of membrane pores with specific size requirements exist in the walls of the hollow fibers. The dialyzer mainly utilizes the principle of semipermeable membrane, introduces the blood of uremia patient and dislysate simultaneously in the dialyzer, makes both in the inside and outside reverse flow of fibre membrane wall, and the poisonous macromolecule in the blood can flow out to the membrane wall outside through the membrane hole, along with the dialyzer outflow is internal. Meanwhile, the functions of removing blood toxin, supplementing blood nutrient substances and adjusting the pH value of blood can be realized by virtue of solute gradient, osmotic gradient and water pressure gradient on the two sides of the membrane wall. If the hollow fiber wall is damaged, blood loss of the patient can be caused, and the dialysis treatment effect of the patient is seriously influenced.
Therefore, in the existing dialyzer assembly production process, the integrity of the fiber membrane wall is detected by adopting a wet leak detection method. The membrane holes on the membrane wall are sealed by water for injection, then compressed air with specific pressure is introduced into two ends of the hollow fiber membrane bundle for pressure maintaining, and the integrity of the membrane wall is judged by detecting the pressure drop value in unit time. After detection, a large amount of water for injection is present in the fiber membrane bundle, and excessive water needs to be quickly removed to a proper value in the subsequent process step, otherwise the quality guarantee period, sterilization and service performance of the dialyzer are affected. The production takt time of the dialyzer assembly production line is fast, the production speed of the dialyzer assembly production line can be seriously reduced by adopting the traditional hot air drying process or other single drying processes, meanwhile, the process flexibility is not enough, the dialyzer drying curve is difficult to control, and the damage of the fiber membrane bundle is easily caused after the drying process steps are completed. The dialyzer consists of a membrane bundle, a shell, a sealing layer and an end cover. Wherein the membrane bundle is composed of a plurality of hollow fibers, and a plurality of membrane pores with specific size requirements exist in the walls of the hollow fibers. The dialyzer mainly utilizes the principle of semipermeable membrane, introduces the blood of uremia patient and dislysate simultaneously in the dialyzer, makes both in the inside and outside reverse flow of fibre membrane wall, and the poisonous macromolecule in the blood can flow out to the membrane wall outside through the membrane hole, along with the dialyzer outflow is internal. Meanwhile, the functions of removing blood toxin, supplementing blood nutrient substances and adjusting the pH value of blood can be realized by virtue of solute gradient, osmotic gradient and water pressure gradient on the two sides of the membrane wall. If the hollow fiber wall is damaged, blood loss of the patient can be caused, and the dialysis treatment effect of the patient is seriously influenced.
Therefore, in the existing dialyzer assembly production process, the integrity of the fiber membrane wall is detected by adopting a wet leak detection method. The membrane holes on the membrane wall are sealed by water for injection, then compressed air with specific pressure is introduced into two ends of the hollow fiber membrane bundle for pressure maintaining, and the integrity of the membrane wall is judged by detecting the pressure drop value in unit time. After detection, a large amount of water for injection is present in the fiber membrane bundle, and excessive water needs to be quickly removed to a proper value in the subsequent process step, otherwise the quality guarantee period, sterilization and service performance of the dialyzer are affected. The takt time of cerini dialyser cerini assembly production line is very fast, adopts traditional hot air drying device or other single drying device, not only can seriously reduce the production speed of cerini dialyser cerini assembly production line, simultaneously because the function singleness of device, is difficult to control cerini dialyser cerini drying curve, causes the damage of fibre membrane bundle after the drying process step is accomplished easily.
Disclosure of Invention
The invention aims to provide a microwave hot air drying device and a microwave hot air drying method, and aims to solve the problems that a dialyzer is low in drying speed and a fiber membrane bundle is easy to damage in the drying process.
The invention provides a microwave hot air drying device, comprising:
the microwave drying module comprises a drying chamber and a microwave introducing component, wherein the drying chamber is used for drying a dialyzer and comprises an air inlet pipeline and an exhaust pipeline, and the microwave introducing component is installed in the drying chamber;
the pressure regulating module comprises a first pressure regulating valve and a feedback gas path for measuring gas pressure, and the first pressure regulating valve is connected with the feedback gas path;
the cold and hot air switching module comprises a reversing valve and a heater, and one end of the reversing valve is connected with the first pressure regulating valve; the heater comprises an air inlet end and an air outlet end, and the air inlet end of the heater is connected with the reversing valve; and the combination of (a) and (b),
and one end of the gas distributor is connected with the drying chamber through the gas inlet pipeline, and the other end of the gas distributor is connected with the feedback gas circuit, the reversing valve and the gas outlet end of the heater.
Optionally, the pressure regulating module further includes a first air source air inlet, a second air source air inlet, a two-position three-way valve, and two second pressure regulating valves, and the first air source air inlet is connected to the first pressure regulating valve; the second air source air inlet is connected with the two-position three-way valve, one end of the two-position three-way valve is connected with the two second pressure regulating valves, and the other end of the two-position three-way valve is connected with the first pressure regulating valve; the two second pressure regulating valves are arranged at one end of the feedback air path.
Optionally, the pressure regulating module further comprises a pressure gauge, a pressure switch and a spiral pipe, wherein the spiral pipe is connected with the feedback gas circuit and the gas distributor; the feedback gas path is provided with the pressure gauge and the pressure switch, and the pressure switch is arranged at one end of the feedback gas path, which is close to the spiral pipe; the pressure gauge is arranged at one end, far away from the second pressure regulating valve, of the feedback air path.
Optionally, the cold-hot air switching module further comprises a thermocouple for detecting the internal temperature of the heater and a protection switch for cutting off a power supply, the thermocouple is installed in the heater, and a resistance wire for heating is arranged in the heater; the protection switch is installed on the outer wall of the heater. .
Optionally, a first thermal resistor for detecting the temperature of the supplied air is provided between the heater and the gas distribution chamber.
Optionally, the microwave drying module further comprises a pneumatic control on-off valve, a differential pressure switch for detecting exhaust and a second thermal resistor for detecting exhaust temperature, and the air inlet pipeline is provided with the pneumatic control on-off valve; the exhaust pipeline is provided with the differential pressure switch and the second thermal resistor.
Optionally, the microwave drying module further comprises a tray for placing a dialyzer and an air cylinder, and the two sides of the tray are respectively connected with the air inlet pipeline and the exhaust pipeline; the cylinder sets up outside the drying chamber and with the tray is connected, the cylinder is used for the drive the tray business turn over the drying chamber.
Optionally, the microwave introducing assembly includes a magnetron and a microwave power supply, and the magnetron is connected to the microwave power supply through a cable.
Optionally, the exhaust gas treatment device further comprises an exhaust gas treatment module, wherein the exhaust gas treatment module comprises a steam-water separator, an exhaust fan and a condensate pump, one end of the exhaust pipeline is connected with the steam-water separator, and the exhaust fan and the condensate pump are installed on the steam-water separator.
On the other hand, a drying method of the microwave hot air drying device is also provided, a staged drying method is adopted, the first drying stage is microwave hot air combined drying, the microwave power is 5000W for 50s, the microwave introducing assembly dries the dialyzer, and meanwhile, the gas distributor introduces 0.8bar of cold air into the drying chamber, and the ventilation time is 50 s;
the second drying stage is microwave and hot air combined drying, the gas distributor introduces high-pressure hot air with the temperature of 100 ℃ and the pressure of 2bar into the drying chamber, and the ventilation time is 250 s; when hot air is introduced into the drying chamber, the microwave introduction assembly dries a dialyzer, wherein the drying time is 100s under the microwave power of 3500W, and then the drying time is changed into 50s under the microwave power of 1500W;
and the third drying stage is hot air drying, and the air distributor introduces cold air of 0.8bar into the drying chamber for 10 s.
According to the microwave hot air drying device, the cold and hot air switching module and the microwave drying module are connected through the air distributor, so that various drying modes of microwave hot air combined drying, hot air drying and microwave drying can be realized, the drying curve is gently raised, and the drying process is controllable. The pressure of the gas introduced into the drying chamber can be adjusted by the pressure adjusting module. The temperature of the gas introduced into the drying chamber can be controlled by arranging the heater. Cold air or hot air can be switched to enter the air distributor at any time by arranging the reversing valve. The practical application result shows that the drying equipment designed and produced by the invention not only effectively improves the drying rate of the dialyzer, but also avoids the damage of the fiber membrane bundle in the drying process.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural view of a microwave hot air drying device according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic structural diagram of a microwave hot air drying device according to an embodiment of the present invention, and as shown in fig. 1, an embodiment of the present invention provides a microwave hot air drying device, which includes a microwave drying module 10, a pressure adjusting module 20, a hot and cold air switching module 30, and an air distributor 4, where the microwave drying module 10 includes a drying chamber 11 for drying a dialyzer 7 and a microwave introducing assembly 12, the drying chamber 11 includes an air inlet pipeline 111 and an air outlet pipeline 112, and the drying chamber 11 is installed with the microwave introducing assembly 12. The pressure regulating module 20 comprises a first pressure regulating valve 21 and a feedback air path 22 for measuring air pressure, wherein the first pressure regulating valve 21 is connected with the feedback air path 22. The cold and hot air switching module 30 includes a direction valve 31 and a heater 32, and one end of the direction valve 31 is connected to the first pressure regulating valve 21. The heater 32 comprises an air inlet end and an air outlet end, and the air inlet end of the heater 32 is connected with the reversing valve 31. One end of the gas distributor 4 is connected with the drying chamber 11 through a gas inlet pipeline 111, and the other end of the gas distributor 4 is connected with a feedback gas path 22, a reversing valve 31 and a gas outlet end of a heater 32.
According to the microwave hot air drying device provided by the embodiment of the invention, the air distributor 4 is connected with the cold and hot air switching module 30 and the microwave drying module 10, so that various drying modes of microwave hot air combined drying, hot air drying and microwave drying can be realized, the drying curve is gently raised, and the drying process is controllable. The pressure of the gas introduced into the drying chamber 11 can be adjusted by means of the pressure regulating module 20. By providing the heater 32, the temperature of the gas introduced into the drying chamber 11 can be controlled. Cold or hot air can be switched to enter the air distributor 4 at any time by setting the reversing valve 31. The practical application result shows that the drying equipment designed and produced by the invention not only effectively improves the drying rate of the dialyzer 7, but also avoids the damage of the fiber membrane bundle in the drying process.
As shown in fig. 1, in some embodiments of the present invention, the pressure regulating module 20 further includes a first air supply inlet 23, a second air supply inlet 24, a two-position three-way valve 25 and two second pressure regulating valves 26, the first air supply inlet 23 is connected to the first pressure regulating valve 21. The second air source inlet 24 is connected with a two-position three-way valve 25, one end of the two-position three-way valve 25 is connected with two second pressure regulating valves 26, and the other end of the two-position three-way valve 25 is connected with the first pressure regulating valve 21. Two second pressure regulating valves 26 are provided at one end of the feedback air path 22. Specifically, the first gas source inlet 23 leads to a process gas source, and the second gas source inlet 24 leads to an operation gas source. The first pressure regulating valve 21 is a remote pressure regulating valve, and the second pressure regulating valve 26 is a precision pressure regulating valve.
Further, in some embodiments of the present invention, a filter 5 is disposed between the first source air inlet 23 and the first pressure regulating valve 21.
As shown in fig. 1, in some embodiments of the present invention, the pressure regulating module 20 further comprises a pressure gauge 27, a pressure switch 28, and a solenoid 29, wherein the solenoid 29 connects the feedback gas path 22 with the gas distributor 4. The feedback air path 22 is provided with a pressure gauge 27 and a pressure switch 28, and the pressure switch 28 is arranged at one end of the feedback air path 22 near the spiral pipe 29. The pressure gauge 27 is arranged at one end of the feedback air path 22 far away from the second pressure regulating valve 26. Specifically, the spiral tube 29 is a copper tube.
Specifically, the pressure regulating principle of the pressure regulating module 20 is as follows: the compressed air from the second air supply inlet 24 is introduced into the pressure regulating port of the second pressure regulating valve 26 through the two-position three-way valve 25. The gas from the first source inlet 23 is fed through the filter 5 to the working connection of the second pressure regulating valve 26. When the two-position three-way valve is in operation, the connection of the two second pressure regulating valves 26 and the first pressure regulating valve 21 is switched by controlling the on-off of the two-position three-way valve 25. When one of the second pressure regulating valves 26 is connected with the first pressure regulating valve 21, the knob of the first pressure regulating valve 21 is rotated to change the regulating pressure of the second pressure regulating valve 26, so that the compression amount of the spring in the first pressure regulating valve 21 is changed, and the pressure of the process gas is regulated. A process gas source pressure can be set by adjusting the knob of the first pressure regulating valve 21 by observing the parameters of the pressure gauge 27 on the feedback gas line 22. Then, by changing the on state of the two-position three-way valve 25 to connect the other second pressure regulating valve 26 to the first pressure regulating valve 21, another process gas source pressure can be set in the same manner.
As shown in fig. 1, in some embodiments of the present invention, the hot and cold air switching module 30 further includes a thermocouple 33 for detecting the temperature inside the heater 32, and a protection switch 34 for cutting off the power supply, the thermocouple 33 is installed inside the heater 32, and a resistance wire 321 for heating is provided inside the heater 32. A protection switch 34 is installed at an outer wall of the heater 32. The heater 32 heats the gas temperature to a set value by controlling the on-off of the relay of the resistance wire 321.
As shown in fig. 1, in some embodiments of the present invention, a first thermal resistor 35 for detecting the temperature of the supply air is provided between the heater 32 and the air distributor 4.
Specifically, the working principle of the cold-hot air switching module 30 is as follows: the gas flowing out of the first pressure regulating valve 21 in the default state is directly fed into the gas distributor 4 through the change valve 31. When hot air with a specific temperature needs to be fed, the loading state of the reversing valve 31 is switched, the air flowing out of the first pressure regulating valve 21 flows in from the air inlet end of the heater 32 through the reversing valve 31, then flows out from the air outlet end of the heater 32 and is fed into the air distributor 4, and the temperature of the fed air is detected by the first thermal resistor 35 in the hot air feeding process. If the temperature of the heater 32 is too high, the protection switch 34 is activated to cut off the power supply, thereby preventing the occurrence of fire.
As shown in fig. 1, in some embodiments of the present invention, the microwave drying module 10 further includes an air control on-off valve 13, a differential pressure switch 14 for detecting exhaust gas, and a second thermal resistor 15 for detecting exhaust gas temperature, and the air inlet pipe 111 is provided with the air control on-off valve 13. The exhaust line 112 is provided with a differential pressure switch 14 and a second thermal resistor 15. The differential pressure switch 14 is used to detect if any gas is flowing out and if no gas is detected, the microwave power output will be stopped. The gas temperature at the outlet of the dialyzer 7 is detected by the second thermal resistor 15, and the water in the dialyzer 7 is removed to a critical value when the rising slope of the temperature curve reaches zero.
As shown in fig. 1, in some embodiments of the present invention, the microwave drying module 10 further includes a tray 16 for placing the dialyzer 7 and an air cylinder 17, and an air inlet line 111 and an air outlet line 112 are connected to both sides of the tray 16, respectively. The air cylinder 17 is arranged outside the drying chamber 11 and connected with the tray 16, and the air cylinder 17 is used for driving the tray 16 to enter and exit the drying chamber 11. Specifically, a plurality of dialyzers 7 can be placed on the tray 16, and an air inlet pipeline 111 and an exhaust pipeline 112 are communicated with two ends of each dialyzer 7.
In some embodiments of the present invention, the microwave introducing assembly 12 includes a magnetron and a microwave power supply, the magnetron is connected to the microwave power supply through a cable, and the output power of the microwave power supply can be adjusted through an analog quantity.
In some embodiments of the present invention, the condensate pump 63 is provided with a hall sensor for controlling the drainage of the condensate pump 63. When the liquid level of the condensed water is higher than the upper limit, the condensed water pump 63 starts to automatically drain water until the liquid level is lower than the lower limit, and the condensed water pump 63 stops draining water.
As shown in fig. 1, in some embodiments of the present invention, the exhaust gas treatment module 60 is further included, the exhaust gas treatment module 60 includes a steam-water separator 61, an exhaust fan 62 and a condensed water pump 63, one end of the exhaust pipeline 112 is connected to the steam-water separator 61, and the exhaust fan 62 and the condensed water pump 63 are installed on the steam-water separator 61.
An embodiment of the present invention further provides a drying method of the microwave hot air drying device according to any one of claims 1 to 9, wherein a staged drying method is adopted, the first drying stage is a microwave hot air combined drying method, the microwave power is 5000W for 50s, while the microwave introducing component dries the dialyzer, the gas distributor introduces 0.8bar cold air into the drying chamber, and the ventilation time is 50 s;
the second drying stage is microwave and hot air combined drying, and a gas distributor introduces high-pressure hot air with the temperature of 100 ℃ and the pressure of 2bar into a drying chamber, wherein the ventilation time is 250 s; when hot air is introduced into the drying chamber, the microwave introducing assembly dries the dialyzer, the drying time is 100s under the microwave power of 3500W, and then the drying time is changed into 50s under the microwave power of 1500W;
the third drying stage is hot air drying, and the air distributor introduces 0.8bar cold air into the drying chamber for 10 s.
In this embodiment, the microwave drying is divided into three stages, the power of each stage is 5000W, 3500W and 1500W, and the corresponding time is 50s, 100s and 50 s. The hot air drying is also divided into three stages, wherein the hot air first stage is introduced into the air distributor 4 at 0.8bar for 50s, the hot air at 100 deg.C and 2bar for 250s is introduced at the second stage, and the cold air at 0.8bar for 10s is introduced at the third stage. After the parameters are set, a hot air and microwave combined drying mode is selected, 5 dialyzers 7 are loaded into the tray 16, then the air cylinder 17 is started, the tray 16 is pushed into the drying chamber 11, the drying chamber 11 is closed, and the microwave and hot air drying device starts to work.
In the first microwave stage, the magnetron is controlled to output 5000W of microwaves for 50s, and low-pressure cold air of 0.8bar flowing out of the first pressure regulating valve 21 is directly blown into the gas distributor 4 without passing through the heater 32 and is further distributed to each dialyzer 7. The microwave and the hot air are in the same time in the first stage, and the aim is to rapidly blow away the free moisture in the middle of the fiber membrane bundle, so that the membrane wall is prevented from being broken when high-pressure air is introduced.
Then microwave and hot air drying are simultaneously carried out to enter a second stage, the microwave output power is changed to 3500W, and the duration is 100 s. The microwave then enters the third stage where the output power is 1500W for a duration of 50 s. The hot air second stage limiting time is 250s, the state of the two-position three-way valve 25 is controlled and switched, the pressure of the gas flowing out of the first pressure regulating valve 21 is changed to 2bar, the state of the reversing valve 31 is changed, the gas flows in from the gas inlet end of the heater 32 through the reversing valve 31, then flows out from the gas outlet end of the heater 32 and is sent into the gas distributor 4, and the temperature of the supplied air is detected and controlled to 100 ℃ by the first thermal resistor 35 in the hot air supplying process. The gas flowing from the gas distributor 4 into the feedback gas path 22 is fed back to the two first pressure control valves 21 through the solenoid 29, the pressure switch 28 and the pressure gauge 27. The pressure switch 28 action represents that the supply air pressure is acceptable. The gas then flows out of the dialyzer 7 into the exhaust line 112, the differential pressure switch 14 detects the gas output, and the microwave introduction assembly 12 operates normally. The waste steam enters a steam-water separator 61, the steam and the water are discharged by an exhaust fan 62, and the condensed water is discharged by a condensed water pump 63. In the whole drying process, the gas temperature at the outlet of each dialyzer 7 is detected through the second thermal resistor 15, when the rising slope of the temperature curve reaches zero value, namely the moisture in the dialyzer 7 is removed to a critical value, and at the moment, the hot air second drying stage is ended in advance.
And (3) hot air drying, entering a third stage, introducing 0.8bar cold air to cool the dialyzer 7 for 10S, ending the third stage, opening the drying chamber 11, pushing the air cylinder 17 out of the tray 16, taking down the dialyzer 7, and ending the complete microwave and hot air combined drying process.
If the hot air drying mode is selected, the microwave hot air drying device automatically performs the step of hot air drying, otherwise, if the microwave drying mode is selected, the microwave hot air drying device automatically performs the step of microwave drying.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116538768A (en) * | 2023-06-15 | 2023-08-04 | 新特能源股份有限公司 | Microwave drying control method, remote control equipment and system |
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