CN113042020B - Desorption device for RDE detection, desorption method and screening method thereof - Google Patents
Desorption device for RDE detection, desorption method and screening method thereof Download PDFInfo
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- CN113042020B CN113042020B CN202110358706.5A CN202110358706A CN113042020B CN 113042020 B CN113042020 B CN 113042020B CN 202110358706 A CN202110358706 A CN 202110358706A CN 113042020 B CN113042020 B CN 113042020B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention provides a desorption device for RDE detection, and relates to the technical field of emission detection of pollutants of motor vehicles. The desorption device for RDE detection comprises an air compressor, an air filtering heater and an air storage tank; the outlet of the air compressor is communicated with the inlet of the air filtering heater, the outlet of the air filtering heater is communicated with the inlet of the air storage tank, and the air storage tank is provided with a plurality of output pipelines which are used for being connected with the filtering dryer. According to the desorption device for RDE detection, the air storage tank and the plurality of filter dryers are added, so that the regeneration component is desorbed simultaneously by multiple channels, and the desorption efficiency is improved. On the basis, the invention also provides a desorption method and a screening method.
Description
Technical Field
The invention relates to the technical field of emission detection of motor vehicle pollutants, in particular to a desorption device for RDE detection, a desorption method and a screening method thereof.
Background
At the end of 2016, related departments jointly release national standard GB18352.6-2016 (light automobile pollutant emission limit and measurement method (Chinese sixth stage)), which is newly added with actual running pollutant emission (Real Drive Emission) detection, called RDE detection for short. The test requirement makes the automobile emission detection an important step from laboratory detection to actual road emission detection.
Currently, there are no existing devices on the market that specifically deal with the regeneration section of the RDE detection device (air filter and air dryer), and desorption of the regeneration section of the RDE detection device is performed by a self-made simple device. Fig. 1 is a schematic diagram of a desorption device of a conventional RDE detection apparatus, and as shown in fig. 1, a detection mechanism is generally connected to a filter dryer 4 to be desorbed by an air compressor 1, an air filter element 15, and a pressure regulating valve 13, and a filter cotton 14 is disposed upstream of the air compressor 1. The desorption device has only one interface, and the desorption efficiency is lower because the desorption needs a longer time, which directly affects the schedule of RDE test.
Disclosure of Invention
The invention aims to provide a desorption device, a desorption method and a screening method for RDE detection, which are helpful for solving the technical problems.
The invention is realized in the following way:
the desorption device for RDE detection comprises an air compressor, an air filtering heater and an air storage tank; the outlet of the air compressor is communicated with the inlet of the air filtering heater, the outlet of the air filtering heater is communicated with the inlet of the air storage tank, and the air storage tank is provided with a plurality of output pipelines which are used for being connected with the filtering dryer.
Above-mentioned RDE detects and uses desorption device, has not only increased gas holder and a plurality of filter drier, utilizes leading gas holder to provide sufficient compressed air source and installation space for a plurality of filter drier, can realize that the multichannel carries out the simultaneous desorption to regeneration component (i.e. filter drier), has improved desorption efficiency. In addition, because the air filtering heater is arranged at the upstream of the air storage tank, the compressed air is preheated and filtered, and the desorption efficiency of the filtering dryer can be further accelerated.
Further, the system also comprises a control terminal, a first valve and a pressure sensor; the first valve is arranged at the inlet end of the air storage tank, and the pressure sensor is arranged in the air storage tank; the first valve and the pressure sensor are electrically connected with the control terminal. The technical effects are as follows: the pressure sensor is used for measuring the air pressure in the air storage tank, the control terminal is used for acquiring the data of the air pressure and controlling the opening of the first valve, and the air storage tank is inflated at a certain flow rate so as to ensure that the air storage tank has constant air pressure, such as 50 kilopascals.
Further, the device also comprises a second valve and a differential pressure sensor; the second valve is arranged on the output pipeline, the differential pressure sensor is arranged on the filter dryer and is used for measuring the pressure change value of the gas flowing through the filter dryer; and the second valve and the differential pressure sensor are electrically connected with the control terminal. The technical effects are as follows: the differential pressure sensor is used for measuring the air pressure of the inlet and the outlet of each filter dryer to obtain the air pressure difference value after the air flows through the filter dryer, and the control terminal obtains the air pressure difference value and closes the second valve at the upstream of the filter dryer when the air pressure difference value reaches a certain amount. At this point, closing the second valve indicates that the filter dryer has completed the desorption process.
Further, the electric heating sleeve is also included; the electric heating sleeve is used for being arranged on the filter drier; the electric heating sleeve is electrically connected with the control terminal. The technical effects are as follows: the electric heating sleeve is used for preheating the filter drier. Before desorption, the moisture in the filter dryer can form an evaporation state at a proper temperature, so that the desorption process can be fast, and the desorption time is shortened.
Further, the temperature sensor also comprises a first temperature detector; the first temperature detector is arranged on the electric heating sleeve; the first temperature detector is electrically connected with the control terminal. The technical effects are as follows: the first temperature detector is used for monitoring the temperature of the electric heating sleeve and maintaining the electric heating sleeve at an appropriate temperature, such as 50 ℃ through the control terminal.
Further, the device also comprises a second temperature detector and a pressure regulating valve; the second temperature detector is arranged on the air filtering heater, and the pressure regulating valve is arranged at the inlet end of the air filtering heater; the second temperature detector and the pressure regulating valve are electrically connected with the control terminal. The technical effects are as follows: the second temperature detector is used for monitoring the temperature of the air filtering heater and maintaining the air filtering heater at a proper temperature, such as 50 ℃ through the control terminal, and the desorption efficiency of the filtering dryer can be further accelerated. The pressure regulating valve is used for changing the pressure of compressed air entering the air filtering heater so as to ensure that the air pressure in the air storage tank is maintained at a required value, for example, the pressure of the pressure regulating valve is set at 100 kilopascals, and then the air pressure of the air storage tank is ensured to be 50 kilopascals by adjusting the first valve.
A desorption method using the desorption device for RDE detection comprises the following steps:
step one, presetting a pressure value P0 of the air storage tank and a numerical value E0 of the differential pressure sensor on the control terminal; step two, starting the air compressor and the air filtering heater, and regulating the size of the first valve by the control terminal according to the data of the pressure sensor to maintain the air pressure of the air storage tank at P0; and thirdly, when the data of the differential pressure sensor on any one of the filter dryers is gradually reduced to E0, the control terminal controls the second valves at the inlet end of the filter dryer to be closed until all the second valves are closed.
Further, before the second step, the control terminal controls the electric heating sleeve to preheat the filter dryer, and the control terminal controls the temperature of the electric heating sleeve to be a preset temperature value according to the data of the first temperature detector.
Further, before the second step, the control terminal controls the air filtering heater to preheat, and the control terminal controls the temperature of the air filtering heater to be a preset temperature value according to the data of the second temperature detector.
A screening method using the desorption device for RDE detection comprises the following steps:
the first step, presetting a pressure value P of the air storage tank on the control terminal 0 Value E of the differential pressure sensor 0 Desorption time T 0 And a desorption limit value R 0 The method comprises the steps of carrying out a first treatment on the surface of the Step two, starting the air compressor and the air filtering heater, and regulating the size of the first valve by the control terminal according to the data of the pressure sensor to maintain the air pressure of the air storage tank at P 0 The method comprises the steps of carrying out a first treatment on the surface of the Third step, running for more than desorption time T 0 After that, the control terminal obtains the real differential pressure value E of the filter dryer through the differential pressure sensor 1 The method comprises the steps of carrying out a first treatment on the surface of the If (P) 0 -E 1 )/(P 0 -E 0 )<R 0 The control terminal judges that the filter dryer is unqualifiedThe method comprises the steps of carrying out a first treatment on the surface of the If (P) 0 -E 1 )/(P 0 -E 0 )≥R 0 And the control terminal judges that the filter dryer is qualified.
The beneficial effects of the invention are as follows:
according to the desorption device for RDE detection, the air storage tank and the plurality of filter dryers are added, the preposed air storage tank is used for providing enough compressed air sources and installation spaces for the plurality of filter dryers, the simultaneous desorption of the regeneration component (namely the filter dryer) by multiple channels can be realized, and the desorption efficiency is improved. In addition, because the air filtering heater is arranged at the upstream of the air storage tank, the compressed air is preheated and filtered, and the desorption efficiency of the filtering dryer can be further accelerated.
According to the desorption method of the desorption device for RDE detection, on the premise of improving the desorption efficiency, a control terminal, a pressure sensor, a first valve, a differential pressure sensor and a second valve are utilized to form a complete automatic detection and control closed loop, so that the control efficiency of the desorption device is improved.
The screening method of the RDE detection desorption device can independently perform performance test on any filter drier on the premise of improving desorption efficiency and device control efficiency, and judges the degradation degree of the filter drier according to the desorption time and the desorption degree of each treatment of the filter drier, and screens the degraded filter drier.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a desorption device of a conventional RDE detection apparatus;
fig. 2 is a schematic structural diagram of a desorption device for RDE detection according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a desorption device for RDE detection according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of a desorption method of a desorption device for RDE detection according to a third embodiment of the present invention;
fig. 5 is a schematic diagram of a screening method of a desorption apparatus for RDE detection according to a fourth embodiment of the present invention.
Icon: 1-an air compressor; 2-an air filtration heater; 3-an air storage tank; 4-a filter dryer; 5-a control terminal; 6-a first valve; 7-a pressure sensor; 8-a second valve; 9-differential pressure sensor; 10-an electric heating sleeve; 11-a first temperature measurer; 12-a second temperature measurer; 13-a pressure regulating valve; 14-filtering cotton; 15-an air filter element; 16-signal converter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. The components of the embodiments of the present invention, as generally described and illustrated in the figures, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
First embodiment:
fig. 2 is a schematic structural diagram of a desorption device for RDE detection according to a first embodiment of the present invention. Referring to fig. 2, the present embodiment provides a desorption device for RDE detection, which includes an air compressor 1, an air filtering heater 2 and an air storage tank 3. Wherein, the export of air compressor 1 communicates with the entry of air filtration heater 2, and the export of air filtration heater 2 communicates with the entry of gas holder 3, and gas holder 3 is provided with a plurality of output pipelines, and output pipeline is used for connecting filter drier 4.
As shown in fig. 2, the inlet end of the air compressor 1 should be further provided with filter cotton 14 to primarily filter impurities contained in the air entering the air compressor 1. The air filter heater 2 performs secondary filtration and drying on the air source conveyed by the air compressor 1, and heats the compressed air to a set temperature so as to accelerate the desorption speed of the filter dryer 4.
The working principle and the operation method of the desorption device for RDE detection of the embodiment are as follows:
the desorption device for RDE detection of the embodiment is characterized in that the air storage tank 3 and the plurality of filter dryers 4 are added at the downstream of the air filter heater 2, and the preposed air storage tank 3 is utilized to provide enough compressed air sources and installation spaces for the plurality of filter dryers 4, so that the simultaneous desorption of the regeneration components (namely the filter dryers 4) by multiple channels can be realized, and the desorption efficiency is improved. In addition, the air filtering heater 2 is arranged at the upstream of the air storage tank 3, so that the compressed air is preheated and filtered, and the desorption efficiency of the filter dryer 4 can be further accelerated.
Second embodiment:
fig. 3 is a schematic structural diagram of a desorption device for RDE detection according to a second embodiment of the present invention. Referring to fig. 3, the present embodiment provides a RDE detecting desorption apparatus, which is substantially the same as the RDE detecting desorption apparatus of the first embodiment, and is different from the first embodiment in that the RDE detecting desorption apparatus of the first embodiment further includes a control terminal 5, a first valve 6, and a pressure sensor 7; the first valve 6 is arranged at the inlet end of the air storage tank 3, and the pressure sensor 7 is arranged in the air storage tank 3; the first valve 6 and the pressure sensor 7 are electrically connected with the control terminal 5.
On the basis of the above structure, optionally, as shown in fig. 3, a second valve 8 and a differential pressure sensor 9 are further included; the second valve 8 is arranged on the output pipeline, the differential pressure sensor 9 is arranged on the filter dryer 4, and the differential pressure sensor 9 is used for measuring the pressure change value of the gas flowing through the filter dryer 4; the second valve 8 and the differential pressure sensor 9 are electrically connected with the control terminal 5.
Based on the above structure, optionally, as shown in fig. 3, an electric heating jacket 10 is further included; the electric heating sleeve 10 is used for being arranged on the filter drier 4; the electric heating jacket 10 is electrically connected with the control terminal 5.
On the basis of the above structure, optionally, as shown in fig. 3, a first temperature detector 11 is further included; the first temperature detector 11 is arranged on the electric heating sleeve 10; the first temperature detector 11 is electrically connected to the control terminal 5.
On the basis of the above structure, optionally, as shown in fig. 3, a second temperature detector 12 and a pressure regulating valve 13 are further included; the second temperature detector 12 is arranged on the air filtering heater 2, and the pressure regulating valve 13 is arranged at the inlet end of the air filtering heater 2; the second temperature detector 12 and the pressure regulating valve 13 are electrically connected with the control terminal 5.
Any of the above-mentioned electrically connected devices are connected to the control terminal 5 through a signal converter 16, where the signal converter 16 is used to convert analog signals such as pressure, temperature, etc. into digital signals. And, the control terminal 5 can also be provided with a display screen for displaying the working condition of each electric appliance and the desorption performance of the filter dryer 4 in real time.
Further, it is preferable that electromagnetic valves be used for the first valve 6 and the second valve 8.
Third embodiment:
fig. 4 is a schematic diagram of a desorption method of a desorption device for RDE detection according to a third embodiment of the present invention. Referring to fig. 4, the present embodiment provides a desorption method of a desorption device for RDE detection, which includes the following steps:
step one, presetting a pressure value P of a gas storage tank 3 on a control terminal 5 0 And the value E of the differential pressure sensor 9 0 。
Step two, starting the air compressor 1 and the air filtering heater 2, and regulating the size of the first valve 6 by the control terminal 5 according to the data of the pressure sensor 7 to maintain the air pressure of the air storage tank 3 at P 0 。
Step three, when the data of the differential pressure sensor 9 on any one filter dryer 4 is gradually reduced to E 0 The control terminal 5 then controls the closing of the second valves 8 of the inlet end of the filter dryer 4 until all second valves 8 are closed.
On the basis of the method, optionally, before the second step, the control terminal 5 controls the electric heating sleeve 10 to preheat the filter dryer 4, and the control terminal 5 controls the temperature of the electric heating sleeve 10 to be a preset temperature value according to the data of the first temperature detector 11. Alternatively, the preset temperature value is assumed to be 50 degrees celsius.
On the basis of the method, optionally, before the second step, the control terminal 5 controls the air filtering heater 2 to perform preheating, and the control terminal 5 controls the temperature of the air filtering heater 2 to be a preset temperature value according to the data of the second temperature detector 12. Alternatively, the preset temperature value is assumed to be 50 degrees celsius.
The desorption method is exemplified as follows:
first, the pressure value P of the air tank 3 is preset at the control terminal 5 0 A value E of 50kp and a differential pressure sensor 9 0 8kp. Then, the air compressor 1 and the air filtering heater 2 are started, the control terminal 5 adjusts the size of the first valve 6 according to the data of the pressure sensor 7, so that the air pressure of the air storage tank 3 is maintained at P 0 I.e. 50kp, then the actual value of the differential pressure sensor 9 is continuously monitored. When the filter dryer 4 is just started, the pressure difference between the front and the rear is larger, the air pressure at the outlet end of the filter dryer 4 is gradually increased along with the promotion of desorption treatment, the value of the differential pressure sensor 9 is gradually reduced, and when the data of the differential pressure sensor 9 on a certain filter dryer 4 is gradually reduced to E 0 I.e. 8kp (in this case, the air pressure upstream of the filter dryer 4 is 50kp and the air pressure downstream of the filter dryer 4 is 42 kp), the control terminal 5 controls to close the second valve 8 at the inlet end of the filter dryer 4. Finally, the other filter dryers 4 continue the same process until all second valves 8 are closed.
In order to ensure that the pressure value of the air tank 3 is constant at 50kp, the value of the upstream pressure regulating valve 13 should preferably be preset at 100kp.
Fourth embodiment:
fig. 5 is a schematic diagram of a screening method of a desorption apparatus for RDE detection according to a fourth embodiment of the present invention. Referring to fig. 5, the present embodiment provides a screening method of a desorption device for RDE detection, which includes the following steps:
first, the pressure value P of the air storage tank 3 is preset on the control terminal 5 0 Value E of differential pressure sensor 9 0 Desorption time T 0 And a desorption limit value R 0 。
Secondly, starting the air compressor 1 and the air filtering heater 2, and regulating the size of the first valve 6 by the control terminal 5 according to the data of the pressure sensor 7 to maintain the air pressure of the air storage tank 3 at P 0 。
Third step, running for more than desorption time T 0 After that, the control terminal 5 obtains the actual differential pressure value E of the filter dryer 4 through the differential pressure sensor 9 1 The method comprises the steps of carrying out a first treatment on the surface of the If (P) 0 -E 1 )/(P 0 -E 0 )<R 0 The control terminal 5 judges that the filter dryer 4 is unqualified; if (P) 0 -E 1 )/(P 0 -E 0 )≥R 0 The control terminal 5 judges that the filter dryer 4 is qualified.
The screening method is exemplified as follows:
first, the pressure value P of the air tank 3 is preset at the control terminal 5 0 50kp, value E of differential pressure sensor 9 0 8kp, desorption time T 0 For 5 hours, desorption limit value R 0 60%. Then, the air compressor 1 and the air filtering heater 2 are started, the control terminal 5 adjusts the size of the first valve 6 according to the data of the pressure sensor 7, so that the air pressure of the air storage tank 3 is maintained at P 0 I.e. 50kp, and then run for 5 hours. Subsequently, the control terminal 5 obtains the actual differential pressure value E of any one of the filter dryers 4 1 If the E 1 15kp, then (P 0 -E 1 )/(P 0 -E 0 ) Equal to (50-15)/(50-8) =83%. Gtoreq.R 0 =60%, the filter dryer 4 is acceptable. If the E 1 28kp, then (P 0 -E 1 )/(P 0 -E 0 ) Equal to (50-28)/(50-8) =52%<R 0 =60%, the filter dryer 4 is not acceptable.
Compared with the prior art that the filter dryer 4 is desorbed by purely manual operation through experience, the invention realizes the automation and visualization of the whole desorption process, improves the desorption efficiency, can intuitively monitor the desorption state of each filter dryer 4, can automatically close the pipeline after the desorption is finished, and displays the pipeline in a control system. The degradation degree (function degradation degree) of the regenerated component can be monitored, and the degraded regenerated component can be timely screened and removed, so that the regenerated component with good state is applied to the RDE test, and the accuracy of the RDE test result is ensured.
The invention greatly promotes the desorption efficiency of the regeneration part by heating the desorption air in the earlier stage and heating the regeneration part by the heating sleeve to form an evaporation state in the regeneration part before desorption, which is different from other inventions that only one heating mode is adopted for desorption. The invention can realize simultaneous desorption of regeneration parts by multiple channels (such as 4 channels, 6 channels and 8 channels) and is different from other invention, the invention can independently monitor and control the desorption state, degradation degree, heating jacket temperature and the like of the regeneration parts of each channel, when the desorption of one regeneration part is completed, the electromagnetic valve of the channel is automatically closed, the system shows that the desorption state is 100%, and other channels can continue to carry out desorption without influence, namely, the invention can realize the automatic control and monitoring of each channel independently. The invention realizes the setting and monitoring of parameters such as temperature, pressure, desorption state and the like through the terminal control system, avoids errors caused by manual adjustment of the parameters such as pressure, temperature and the like, can realize visualization, and has the characteristics of convenience and easiness for use for users.
The invention can be used for the desorption of RDE regeneration parts (filter dryer 4), and the control system of the invention has the characteristics of the settable parameters such as desorption pressure, temperature and the like, the real-time monitoring of desorption state and the like, and can be expanded to regeneration parts which are similar to other industries and need to be desorbed, thereby having wider applicability.
Optionally, the signal transmission line in the technical scheme of the invention can be replaced by a wireless Bluetooth mode, so that the wireless transmission of the device signal is realized.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The screening method of the desorption device for RDE detection is characterized in that the desorption device for RDE detection comprises an air compressor (1), an air filtering heater (2) and an air storage tank (3); the outlet of the air compressor (1) is communicated with the inlet of the air filtering heater (2), the outlet of the air filtering heater (2) is communicated with the inlet of the air storage tank (3), the air storage tank (3) is provided with a plurality of output pipelines, and the output pipelines are used for being connected with the filtering dryer (4);
the desorption device for RDE detection further comprises a control terminal (5), a first valve (6) and a pressure sensor (7); the first valve (6) is arranged at the inlet end of the air storage tank (3), and the pressure sensor (7) is arranged in the air storage tank (3); the first valve (6) and the pressure sensor (7) are electrically connected with the control terminal (5);
the desorption device for RDE detection further comprises a second valve (8) and a differential pressure sensor (9); the second valve (8) is arranged on the output pipeline; the differential pressure sensor (9) is arranged on the filter dryer (4), and the differential pressure sensor (9) is used for measuring the pressure change value of the gas flowing through the filter dryer (4); the second valve (8) and the differential pressure sensor (9) are electrically connected with the control terminal (5);
the method comprises the following steps:
the first step is to preset the pressure value P of the air storage tank (3) on the control terminal (5) 0 The value E of the differential pressure sensor (9) 0 Desorption time T 0 And a desorption limit value R 0 ；
Secondly, starting the air compressor (1) and the air filtering heater (2), and regulating the size of the first valve (6) by the control terminal (5) according to the data of the pressure sensor (7) so as to maintain the air pressure of the air storage tank (3) at P 0 ；
Third step, running for more than desorption time T 0 After that, the control terminal (5) obtains the actual differential pressure E of the filter dryer (4) through the differential pressure sensor (9) 1 The method comprises the steps of carrying out a first treatment on the surface of the If (P) 0 -E 1 ）/（P 0 -E 0 ）< R 0 The control terminal (5) judges that the filter dryer (4) is unqualified; if (P) 0 -E 1 ）/（P 0 -E 0 ）≥ R 0 And the control terminal (5) judges that the filter dryer (4) is qualified.
2. The method for screening a RDE detection desorption apparatus according to claim 1, wherein the RDE detection desorption apparatus further comprises an electric heating jacket (10); the electric heating sleeve (10) is used for being arranged on the filter dryer (4); the electric heating sleeve (10) is electrically connected with the control terminal (5).
3. The method for screening a RDE detecting desorption apparatus according to claim 2, wherein the RDE detecting desorption apparatus further comprises a first temperature detector (11); the first temperature detector (11) is arranged on the electric heating sleeve (10); the first temperature detector (11) is electrically connected with the control terminal (5).
4. A screening method of a RDE detecting desorption apparatus according to claim 3, wherein the RDE detecting desorption apparatus further comprises a second temperature detector (12) and a pressure regulating valve (13); the second temperature detector (12) is arranged on the air filtering heater (2), and the pressure regulating valve (13) is arranged at the inlet end of the air filtering heater (2); the second temperature detector (12) and the pressure regulating valve (13) are electrically connected with the control terminal (5).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US11344863B2 (en) * | 2018-07-09 | 2022-05-31 | The Boeing Company | Systems, devices and methods for regeneration of a sorbent |
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| JP2004036447A (en) * | 2002-07-02 | 2004-02-05 | Mitsubishi Heavy Ind Ltd | Device and method for regeneration of filter |
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