CN112067370A - Adsorption tube aging instrument and method - Google Patents
Adsorption tube aging instrument and method Download PDFInfo
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- CN112067370A CN112067370A CN202010953433.4A CN202010953433A CN112067370A CN 112067370 A CN112067370 A CN 112067370A CN 202010953433 A CN202010953433 A CN 202010953433A CN 112067370 A CN112067370 A CN 112067370A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
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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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The invention discloses an adsorption tube aging instrument and a method, wherein the adsorption tube aging instrument comprises: the aging cabin is used for placing the adsorption tubes to be aged; the vacuum pump is communicated with the aging cabin and is used for promoting the aging cabin to form a vacuum environment and continuously vacuumizing the aging cabin during heating aging so as to collect the gaseous substances desorbed from the adsorption tube; the heater is arranged in the aging cabin and used for heating and aging the adsorption tube; and the condensation trap is provided with a condensation trapping part positioned in the aging cabin and used for condensing part of gaseous substances desorbed from the adsorption pipe into a solid state or a liquid state for adsorption and trapping. The invention has the advantages of no need of using nitrogen gas in the aging process, no secondary pollution to the laboratory environment, high aging efficiency, strong aging effect consistency and the like.
Description
Technical Field
The invention relates to aging regeneration of a Volatile Organic Compound (VOCs) collecting and adsorbing tube, which eliminates and adsorbs organic matters through thermal desorption and recycles the adsorbing tube for sampling analysis.
Background
The adsorption tube sampling is an important means for constant volatile organic compound analysis, sample gas is quantitatively absorbed by the constant-current sampler at a constant flow rate and flows through the adsorption tube, and the volatile organic compounds in the enriched sample gas are adsorbed by the adsorption material in the tube to finish sample collection. And desorbing the enriched sample in the tube by thermal desorption equipment in a laboratory, and inputting the sample into a gas chromatography system for analysis. The adsorption tube for completing thermal desorption sample injection needs to be aged and regenerated, and the last sampling residue is eliminated so as to be recycled and sampled again.
The existing adsorption tube aging technology basically adopts a method of high-temperature heating in cooperation with continuous high-purity nitrogen purging to carry the volatile organic compounds trapped by the adsorption tube out of the adsorption tube through high-temperature airflow so as to achieve the purpose of aging and regeneration. The aging method has the following defects:
1. each adsorption tube needs to maintain a high-purity nitrogen flow rate of 50 ml/min during high-temperature purging, and the whole aging process can take several hours to more than ten hours, so that the consumption of the high-purity nitrogen is extremely high.
2. The purity of the high-purity nitrogen directly influences the final aging effect, and the aging effect cannot meet the detection requirement due to the quality problem of the gas source.
3. A plurality of adsorption materials are easily oxidized at high temperature and lose adsorption effect, oxygen impurities in the purging nitrogen accelerate the oxidation failure of the adsorption materials at high temperature, and the service life is shortened.
4. Organic impurities in the adsorption tube can cause secondary pollution to the air in the laboratory after being blown out of the adsorption tube.
5. Due to the fact that the purging air flow needs to be evenly distributed, the traditional aging instrument generally achieves simultaneous aging of at most 20 adsorption tubes, a large number of adsorption tubes need to be aged in batches, and time, labor and efficiency are low.
6. Different batches of aging, even the same batch of tubes, have different aging degrees due to the difference of temperature and purge flow, and often show the defect of poor repeatability in the test.
Disclosure of Invention
The invention aims to solve the technical problem of providing an adsorption tube aging instrument which does not need to use nitrogen gas and can not cause secondary pollution to the laboratory environment in the aging process so as to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an appearance that ages of adsorption tube which characterized in that includes:
the aging cabin is used for placing the adsorption tubes to be aged;
the vacuum pump is communicated with the aging cabin and is used for promoting the aging cabin to form a vacuum environment and continuously vacuumizing the aging cabin during heating aging so as to collect the gaseous substances desorbed from the adsorption tube;
the heater is arranged in the aging cabin and used for heating and aging the adsorption tube;
and the condensation trap is provided with a condensation trapping part positioned in the aging cabin and used for condensing part of gaseous substances desorbed from the adsorption pipe into a solid state or a liquid state for adsorption and trapping.
By adopting the structure, the invention replaces the nitrogen purging in the prior art by heating the adsorption tube to be aged in a vacuum environment, utilizes the physical characteristic that the saturated vapor pressure of volatile organic compounds at high temperature is far greater than the pressure of a vacuum atmosphere as the source power for organic compound desorption, so that the volatile organic compounds in the adsorption tube are continuously desorbed and desorbed, namely, the temperature and the saturated vapor pressure of the adsorbate in the adsorption tube are increased by heating in the vacuum environment, a vacuum pump is used for creating a low-pressure vacuum atmosphere to discharge limited gas and low-boiling gaseous substances in an aging cabin, when the saturated vapor pressure of the adsorbate is greater than the atmospheric pressure of the adsorbate, the adsorbate is gasified into high-temperature gas and flows to a low-pressure part of a cavity, namely to a condensation trapping part and to the vacuum pump, and once part of the high-boiling adsorbate contacts with the condensation trapping part in the flowing, the cooling condensation becomes liquid or solid-state again, loses power and is caught by the condensation and no longer free flow, avoids it to condense to other low temperature position pollution pipeline, cavity or vacuum pump like this, and then avoids causing the pollution to the laboratory environment, and other gaseous state material that do not get caught by the condensation mainly contain steam and low boiling adsorbate then by the vacuum pump suction to special waste gas pipeline in.
In a further improvement of the invention, the device also comprises a nitrogen purging device which is communicated with the aging chamber. The nitrogen purging device can be matched with a vacuum pump to alternately fill nitrogen and evacuate before heating and aging so as to promote an aging chamber to form a vacuum environment, and can also purge and cool an adsorption pipe after heating and aging.
In a specific embodiment of the invention, the aging chamber is provided with a rear door plate, and vent holes for supporting the adsorption pipes are distributed on the rear door plate.
In a specific embodiment of the invention, the aging chamber is provided with a front door plate, the outer surface of the front door plate is provided with a refrigeration semiconductor to form the condensation trap, and the inner surface of the front door plate in the aging chamber forms the condensation trap part. Through the structure, solid and/or liquid substances desorbed from the adsorption pipe can be collected on the inner surface of the front door panel, and the centralized cleaning is convenient.
In a specific embodiment of the present invention, the heater is a honeycomb structure, heating carrier holes are densely distributed, and one adsorption tube is inserted into each heating carrier hole. The structure can realize synchronous aging of hundreds of adsorption tubes, greatly improves the aging efficiency and aging uniformity of the adsorption tubes through large-batch synchronous aging, and improves the analysis repeatability index.
In addition, the invention also provides an aging method of the adsorption tube, which is characterized by comprising the following steps:
placing an adsorption tube to be aged in a closed aging cabin;
promoting the aging cabin to form a vacuum environment by using a vacuum pump;
in the aging cabin in a vacuum environment, the adsorption pipe is heated and aged by a heater in the vacuum environment, in the heating and aging process, the aging cabin is continuously vacuumized by a vacuum pump to collect gaseous substances desorbed from the adsorption pipe, and part of the gaseous substances desorbed from the adsorption pipe is condensed into a solid state or a liquid state by a condensation catcher to be adsorbed and trapped.
In the embodiment of the invention, before heating and aging, the aging chamber is alternately vacuumized and flushed with nitrogen by using a vacuum pump and a nitrogen purging device to form the vacuum environment. Such measures can fully replace and discharge residual oxygen and water vapor in the aging chamber, and avoid adverse effects on the adsorption pipe in the heating process (such as oxygen accelerating oxidation loss of the adsorption filler at high temperature, and water vapor affecting ultimate vacuum degree and pump working efficiency if being condensed in a vacuum pump).
In a specific embodiment of the invention, the nitrogen purge is turned off during heat aging. In the heating and aging process, the nitrogen purging device is closed, and the continuous purging of high-purity nitrogen is stopped, so that the gas consumption of a laboratory can be greatly reduced.
In a specific embodiment of the invention, after the heating and aging are completed, the vacuum pump is closed, the nitrogen purging device is used for filling nitrogen into the aging chamber, so that the pressure in the aging chamber is raised back to the atmospheric pressure, the nitrogen purging device is kept in a purging state, and a door plate of the aging chamber is opened, so that the adsorption pipe is rapidly cooled in the nitrogen purging state.
In the embodiment of the invention, whether the aging process is finished or not is judged by measuring the ultimate vacuum degree in the aging chamber.
By adopting the technical scheme, the invention has the following advantages:
1. the invention does not need to use high-purity nitrogen for continuous purging in the heating and aging process, thereby greatly saving the gas consumption of a laboratory.
2. The vacuum atmosphere avoids the problem of incomplete aging caused by the purity of the purge gas, and ensures the consistency of the aging effect.
3. The desorption efficiency of vacuum aging is more than 3 times of that of the traditional purging aging, and the aging efficiency can be greatly improved.
4. The vacuum aging also avoids the high-temperature oxidation of the adsorption material, and can effectively prolong the cycle service life of the adsorption tube.
5. The impurities desorbed by the adsorption tube are effectively recovered and intensively discharged, and the pollution to the laboratory environment is avoided.
6. The adsorption tubes with the number of more than 100 can be aged at one time, and compared with the traditional method for aging 10 adsorption tubes, the flux of a single batch of an aging instrument is greatly improved.
7. The aging process is controlled by temperature, vacuum degree and time, the final aging degree can be judged through ultimate vacuum, the problems that the traditional aging depends on experience and no feedback is needed and closed-loop control is not realized are solved, and the consistency among aging batches is reliably improved.
8. The heating and heat preservation effect under the vacuum atmosphere is good, the energy loss is less, and the energy is saved and the efficiency is high.
Drawings
FIG. 1 is a schematic diagram of the aging apparatus of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the aging apparatus of the present invention;
FIG. 3 is a schematic diagram of the aging chamber of the present invention;
FIG. 4 is a schematic structural view of a heater according to the present invention;
FIG. 5 is an exploded view of the heater of the present invention;
fig. 6 is a schematic structural view of the sorbent tube carrier of the present invention.
Detailed Description
As shown in fig. 1 and 2, the adsorption tube aging apparatus of the present invention includes a base 600, an aging chamber 100, a heater 200, a vacuum pump 300, a nitrogen purging device 400, and a condensation trap 500.
Wherein, the heater 200 is fixed in the aging chamber 100, the vacuum pump 300 is positioned outside the aging chamber 200 and is communicated with the aging chamber 100 through an air pipe, and an isolation valve 310 is arranged between the vacuum pump 300 and the aging chamber 200. The nitrogen purging device 400 is also located outside the aging chamber 100 and communicates with the aging chamber 100 through a gas pipe.
The aging chamber 100 is composed of a chamber body 110 having a through structure, a front door panel 120 provided at a front end of the chamber body 110, and a rear door panel 130 provided at a rear end of the chamber body 110. The cabin 110 is made of aluminum alloy, and the front and rear ends thereof are provided with silica gel sealing rings to ensure that the cabin 110 is airtight when the front and rear door panels 120 and 130 close the cabin.
Fig. 2 in combination with fig. 3 shows that the base 600 has a mounting surface 610 inclined at 45 °, and the nacelle 110 is fixed to the mounting surface 610 obliquely by means of profile brackets 611 such that the nacelle 110 is located at the front end above and at the rear end below. A slide rail 620 is fixed to the mounting surface 100 at the rear of the cabin 100. The rear door panel 130 is made of stainless steel, and the rear door panel 130 is slidably mounted on the slide rail 620. After aging is completed, the rear door panel can slide down along the sliding rail 620 under the action of gravity.
The outer surface of the front door panel 120 is fixed with a refrigeration semiconductor 510, the front door panel 120 is made of an aluminum plate with good heat conductivity, and the middle of the front door panel is a refrigeration area with the wall thickness of only 1.5mm, so that the loss in the temperature conduction process can be reduced, the refrigeration effect is accelerated, and the refrigeration temperature can reach minus 10 degrees. The front door panel 120 and the refrigeration semiconductor 510 form the condensation trap 500 of the present invention, and the inner surface of the refrigerated area is positioned in the burn-in chamber 100 after the front door panel 120 is closed to form a condensation trap site 520 of the condensation trap 500. In addition, the exterior of the front door 120 is further provided with a door shell 121 covering the refrigeration semiconductor 510, the door shell 121 is made of aluminum sheet metal, and heat dissipation holes are formed in the door shell 121 to achieve a rapid heat dissipation effect.
The exterior of the nacelle 110 has a nacelle outer shell 111, and the top of the nacelle outer shell 111 has heat dissipation holes. A heat dissipation fan is arranged below the cabin body 110 in the base 600, the heat dissipation fan is turned on when the cabin body temperature 110 is too high, and the airflow takes away heat from bottom to top along the gaps around the cabin body 110 and the cabin body shell 111, so that the effect of cooling is achieved.
The heater 200 has a honeycomb structure, and 106 heating holes 201 penetrating from the front end surface to the rear end surface and parallel to the mounting surface 610 are densely distributed for inserting the adsorption tubes 10. A pipe bracket 131 is further fixed to the inner surface of the rear door panel 130 by screws, and vent holes 132 corresponding to the positions of the heating holes 201 one by one are distributed on the pipe bracket 131. As shown in fig. 1, the rear door panel 130 further has an air duct 133 therein, which is communicated with all the air vents 132.
Since the mounting surface 610 of the base 600 is inclined, the suction pipe 10 inserted into the heating hole 201 is also inclined, and when the rear door panel 130 is opened and slides down along the slide rail 620, the suction pipe 10 falls into the ventilation hole 132 of the pipe bracket 131 in a free fall manner under the action of gravity.
As shown in fig. 3, the front door 120 is connected to the edge of the cabin 100 by a rotating hinge 140 to open and close. The internal gap of the rotating hinge 140 is positioned through the power line extending from the refrigeration semiconductor 510 for hiding. Hasp door locks 150 are arranged at the combination position of the front door panel 120 and the cabin 110 and the combination position of the rear door panel 130 and the cabin 110, and the front door panel 120 and the rear door panel 130 can be respectively locked with the cabin 110 after the front door panel 120 and the door panel 130 are closed.
At the bottom of the chamber 110 are electrodes 112, vacuum line connections 113, and pressure and temperature sensors 114. The pressure and temperature sensors 114 are capable of detecting the pressure and temperature within the aging chamber 100.
As shown in fig. 1 and fig. 2, the vacuum pump 300 is installed in the base 600, and is connected to the vacuum line connector 113 through the isolation solenoid valve 310 via the air pipe, and the vacuum pump 300 is communicated with and isolated from the aging chamber 100 by controlling the opening and closing of the solenoid valve 310. The nitrogen purge 400 includes a charge solenoid valve 410 in communication with a nitrogen source. The air-charging solenoid valve 410 is provided in the base 600 and communicates with the air passage 133 in the rear door panel 131. The gas filling solenoid valve 410 is opened to fill nitrogen gas into the aging chamber 100 or purge the adsorption pipe through the rear door panel 130. The front surface of the base 600 is also embedded with a display screen 630 which can display data such as pressure and temperature in the aging chamber 100.
As shown in fig. 3, a boss is processed in the aging chamber 100, and lugs 202 are arranged on both sides of the heater 200, and the lugs 202 are fixed on the boss by screws to fix the heater inside the aging chamber 100, so that threaded holes do not need to be drilled in the aging chamber, and the strength of the aging chamber 100 is ensured.
As shown in fig. 4 and 5, the heater 200 is composed of a heating case, a heating body, and a compression insulating layer.
The heating body is composed of 106 regular adsorption tube carriers 220 and a stainless steel heating belt 230 wound between the adsorption tube carriers 220 in adjacent rows.
The insulating layer is located around the heating body, and the zirconia ceramic plate 231 is used to compress and insulate the adsorption tube carrier 220 and the stainless steel heating belt 230, specifically, four zirconia ceramic plates 231 are respectively located at the upper, lower, left and right sides of the heating body, wherein the zirconia ceramic plate 231 located at the lower side has openings to expose two electrodes 232 of the stainless steel heating belt 230. The insulating layer may be made of other insulating materials such as mica, in addition to ceramic plate as the insulating material.
As shown in fig. 6, the adsorption tube carrier 220 is composed of a stainless steel tube 221 and at least one glass fiber sleeve 222 which is externally sleeved on the stainless steel tube 221. In this embodiment, the sorbent tube supports 220 are fabricated in different positions by adding a layer of glass fiber sleeves 222 for every 15 ℃ temperature difference. Since stainless steel has low thermal conductivity and the temperature of the center of the heater 200 is higher than that of the peripheral edges, the three middle rows of glass fiber sleeves are provided with three layers, which can effectively control the uniformity of temperature conduction. The fiberglass sleeve 222 can achieve insulation and also enable heat to be uniformly transferred to the interior of the sorbent tube.
As shown in fig. 4 and 5, the heating case includes groove panels 211 located on the front and rear end surfaces of the heating body 201, front panels 212 located on the upper and lower end surfaces of the heating body 201, and side panels 213 located on both sides of the heating body 201. The two front panels 212 on the upper and lower end surfaces and the two side panels 213 on the left and right side surfaces are locked and fixed by the fixing screws 214 to the compression insulating layer 230 and the heating body therein. The two slot panels 211 on the front and rear end faces have waist-shaped slots 215 for respectively exposing the openings on the two ends of the stainless steel tube 221. The tube hole of the stainless steel tube 221 forms a heating hole of the heater 200. The waist-shaped groove 215 is a stepped groove, and plays a role in preventing the stainless steel pipe 221 from falling out and overcoming hole position deviation.
The adsorption tube aging instrument provided by the invention is used for performing adsorption tube aging operation as follows:
1. the rear door panel 130 of the aging chamber 100 is closed and the adsorption tubes to be aged are loaded on the honeycomb-structured heater 200.
2. The front door panel 120 of the aging chamber 100 is closed, the vacuum pump 300 is started to reduce the pressure of the aging chamber 100 to be below 90% of the atmospheric pressure, and the airtightness of the system is tested.
3. The vacuum pump 300 is continuously used to reduce the pressure of the aging chamber 100 to below 5000 Pa.
4. The vacuum pump 300 was suspended and the nitrogen solenoid valve was opened to recharge the aging chamber 100 to 90% atmospheric pressure.
5. And repeating the steps S202 and S203 for three or four times to fully replace and discharge residual oxygen and water vapor in the cabin, so as to avoid influence on the adsorption pipe in the heating process.
6. The vacuum pump 300 is started and simultaneously the condensation trap 500 is started to reduce the pressure of the aging chamber 100 to the minimum pressure that the vacuum pump 300 can maintain.
7. According to the types of different adsorption tubes, a temperature rise curve control program matched with the corresponding adsorption tube is adopted, the adsorption tube is heated by the heater 200, the adsorption tube reaches the optimized aging temperature step by step, and the adsorption tube is kept for a certain time to be fully desorbed. The aging degree can be judged according to the change of the ultimate vacuum degree, so that whether the heating aging is finished or not is judged. Wherein, the gaseous substance that desorbs from the adsorption tube is collected by the vacuum pump and discharges to the dedicated exhaust gas pipeline, and the gaseous substance that is easy to be condensed in the gaseous substance that desorbs from the adsorption tube is condensed into solid state or liquid state by the condensation catcher and is adsorbed on the condensation catching position (namely the front door panel) in the process of flowing to the low pressure position.
8. After the heating and aging are completed, the heater is closed, the heating is stopped, the vacuum pump is closed, the gas-filled electromagnetic valve of nitrogen is opened, and the pressure of the aging chamber 100 is raised back to the atmospheric pressure.
9. Keeping nitrogen purging, opening the rear door panel 130 of the rear aging chamber 100, enabling the adsorption tubes to slide out of the chamber body 110 along with the rear door panel, and enabling the adsorption tubes to be quickly suspended and cooled under the condition of keeping nitrogen purging.
10. And (5) taking down the adsorption tube after cooling, and installing two end sealing caps to finish aging operation.
As can be seen from the above detailed description, the present invention has the following advantages:
1. the invention does not need to use high-purity nitrogen for continuous purging in the heating and aging process, thereby greatly saving the gas consumption of a laboratory.
2. The vacuum atmosphere avoids the problem of incomplete aging caused by the purity of the purge gas, and ensures the consistency of the aging effect.
3. The desorption efficiency of vacuum aging is more than 3 times of the traditional purging aging, and the aging efficiency can be greatly improved.
4. The vacuum aging also avoids the high-temperature oxidation of the adsorption material, and can effectively prolong the cycle service life of the adsorption tube.
5. The impurities desorbed by the adsorption tube are effectively recovered and intensively discharged, and the pollution to the laboratory environment is avoided.
6. The adsorption tubes with the number of more than 100 can be aged at one time, and compared with the traditional method for aging 10 adsorption tubes, the flux of a single batch of an aging instrument is greatly improved.
7. The aging process is controlled by temperature, vacuum degree and time, the final aging degree can be judged by ultimate vacuum, the problems that the traditional aging depends on experience, no feedback and no closed-loop control exist are solved, and the consistency among aging batches is reliably improved.
8. The heating and heat preservation effect under the vacuum atmosphere is good, the energy loss is less, and the energy is saved and the efficiency is high.
Claims (10)
1. The utility model provides an appearance that ages of adsorption tube which characterized in that includes:
the aging cabin is used for placing the adsorption tubes to be aged;
the vacuum pump is communicated with the aging cabin and is used for promoting the aging cabin to form a vacuum environment and continuously vacuumizing the aging cabin during heating aging so as to collect the gaseous substances desorbed from the adsorption tube;
the heater is arranged in the aging cabin and used for heating and aging the adsorption tube;
and the condensation trap is provided with a condensation trapping part positioned in the aging cabin and used for condensing part of gaseous substances desorbed from the adsorption pipe into a solid state or a liquid state for adsorption and trapping.
2. The sorbent tube aging instrument of claim 1, wherein: the nitrogen purging device is communicated to the aging cabin.
3. The sorbent tube aging instrument of claim 2, wherein: the aging cabin is provided with a rear door plate, vent holes for supporting the adsorption tubes are distributed on the rear door plate, and the nitrogen purging device is communicated with the vent holes.
4. The sorbent tube aging instrument of claim 3, wherein: the aging cabin is provided with a front door plate, a refrigeration semiconductor is mounted on the outer surface of the front door plate to form the condensation trap, and the front door plate is located on the inner surface in the aging cabin to form the condensation trap part.
5. The sorbent tube aging instrument of claim 2, wherein: the heater is of a honeycomb structure, heating carrier holes are densely distributed, and one adsorption tube is inserted into each heating carrier hole.
6. The sorbent tube aging instrument of claim 4, wherein: the aging cabin is obliquely arranged on the base in a posture that the front door panel is high and the rear door panel is low, the base is provided with a sliding rail, and the rear door panel is slidably arranged on the sliding rail.
7. A method for aging a adsorption tube is characterized by comprising the following steps:
placing an adsorption tube to be aged in a closed aging cabin;
promoting the aging cabin to form a vacuum environment by using a vacuum pump;
in the aging cabin in a vacuum environment, the adsorption pipe is heated and aged by a heater in the vacuum environment, in the heating and aging process, the aging cabin is continuously vacuumized by a vacuum pump to collect gaseous substances desorbed from the adsorption pipe, and part of the gaseous substances desorbed from the adsorption pipe is condensed into a solid state or a liquid state by a condensation catcher to be adsorbed and trapped.
8. The sorbent tube aging method of claim 7, wherein: before heating and aging, alternately vacuumizing and filling nitrogen into the aging cabin by using a vacuum pump and a nitrogen purging device to form the vacuum environment.
9. The sorbent tube aging method of claim 7, wherein: after heating and aging are completed, the vacuum pump is closed, the nitrogen purging device is utilized to fill nitrogen into the aging cabin, so that the pressure in the aging cabin is raised back to the atmospheric pressure, the nitrogen purging device is kept in a purging state, and a rear door plate of the aging cabin is opened to rapidly cool the adsorption pipe in the nitrogen purging state.
10. The sorbent tube aging method of claim 7, wherein: and judging whether the aging process is finished or not by measuring the ultimate vacuum degree in the aging chamber.
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| US20060168844A1 (en) * | 2005-01-28 | 2006-08-03 | Manabu Edamura | Vacuum processing apparatus and vacuum processing method |
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| CN109696394A (en) * | 2019-01-11 | 2019-04-30 | 北京博赛德科技有限公司 | A kind of used in aging of adsorption tubes instrument |
| CN111430157A (en) * | 2020-03-24 | 2020-07-17 | 中山市昦瑞真空科技有限公司 | Novel vacuum aging equipment for film capacitor and production process thereof |
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2020
- 2020-09-11 CN CN202010953433.4A patent/CN112067370A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060168844A1 (en) * | 2005-01-28 | 2006-08-03 | Manabu Edamura | Vacuum processing apparatus and vacuum processing method |
| CN104958995A (en) * | 2015-06-23 | 2015-10-07 | 江苏中远环保科技有限公司 | Technology and device for treating organic waste gas with activated carbon by means of nitrogen heating and vacuum desorption |
| CN205826483U (en) * | 2016-04-25 | 2016-12-21 | 广州市艾谱诺仪器设备有限公司 | A kind of intelligent used in aging of adsorption tubes instrument |
| CN109060645A (en) * | 2018-10-29 | 2018-12-21 | 国网湖南省电力有限公司 | A kind of paper oil insulation material electric-thermal joint burn-in test test method and device |
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| CN111430157A (en) * | 2020-03-24 | 2020-07-17 | 中山市昦瑞真空科技有限公司 | Novel vacuum aging equipment for film capacitor and production process thereof |
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