阅读说明：本技术 一种在线监测天然气露点装置 (On-line monitoring natural gas dew point device ) 是由 艾明刚 国敬 周军 郭庆岑 于华 赵硕 于 2021-10-18 设计创作，主要内容包括：本发明提供了一种在线监测天然气露点装置,属于天然气应用技术领域,有效解决了在线露点仪检测样气随意排放污染环境的问题。该技术方案包括在线露点仪,在线露点仪的入气口与管道采样口连通,其特征在于,在线露点仪的出气口连通有样气处理部件,样气处理部件包括输入端与出气口连通的收集瓶,收集瓶的输出端与燃烧器的输入端连通,燃烧器的燃烧部位于燃烧腔内,燃烧腔的气体输出端与吸附炭箱输入端连通,吸附炭箱通过若干隔板分为多个吸附区,吸附炭箱连接有转动机构。本发明的有益效果为：提供了一种可有效且不间断的处理天然气在线露点仪外排检测样气的在线监测天然气露点装置。(The invention provides a device for monitoring a natural gas dew point on line, belongs to the technical field of natural gas application, and effectively solves the problem that an on-line dew point instrument detects that sample gas is randomly discharged to pollute the environment. This technical scheme includes online dew point hygrometer, online dew point hygrometer's income gas port and pipeline sample connection, a serial communication port, online dew point hygrometer's gas outlet intercommunication has the appearance gas processing part, appearance gas processing part includes the receiving flask of input and gas outlet intercommunication, the output of receiving flask and the input intercommunication of combustor, the combustion part of combustor is located the combustion chamber, the gas output end and the adsorption carbon box input intercommunication in combustion chamber, the adsorption carbon box divide into a plurality of adsorption zones through a plurality of baffles, the adsorption carbon box is connected with slewing mechanism. The invention has the beneficial effects that: the device for monitoring the dew point of the natural gas on line can effectively and uninterruptedly process the discharged detection sample gas of the natural gas on-line dew point instrument.)

1. The device for monitoring the dew point of the natural gas on line comprises an on-line dew point instrument (1), wherein a gas inlet (101) of the on-line dew point instrument (1) is communicated with a pipeline sampling port, and is characterized in that a gas outlet (102) of the on-line dew point instrument (1) is communicated with a sample gas processing component;

the sample gas processing component comprises a collecting bottle (2) with an input end communicated with the gas outlet (102), an output end of the collecting bottle (2) is communicated with an input end of a combustor (3), a combustion part of the combustor (3) is positioned in a combustion cavity (4), and a gas output end of the combustion cavity (4) is communicated with an input end of an adsorption carbon box (5);

the adsorption carbon box (5) is divided into a plurality of adsorption areas (502) through a plurality of partition plates (501), and the adsorption carbon box (5) is connected with a rotating mechanism (6).

2. The on-line monitoring natural gas dew point device according to claim 1, characterized in that the collection bottles (2) are two, and each collection bottle (2) is provided with a natural gas compressor (7);

the gas outlet (102) is communicated with an inlet of a three-way valve (8), two outlets of the three-way valve (8) are respectively communicated with the input end of the natural gas compressor (7) on one collecting bottle (2), the output end of the natural gas compressor (7) is communicated with the input end of the collecting bottle (2), and the output end of each collecting bottle (2) is communicated with the input end of the combustor (3);

and a switch rotating shaft (801) of the three-way valve (8) is coaxially and fixedly connected with an output shaft of the motor (9).

3. The device for monitoring the dew point of natural gas as claimed in claim 2, wherein the gas output end of the combustion chamber (4) is communicated with the input end of the adsorption carbon box (5) through a coil (10);

the adsorption carbon box (5) comprises a cylindrical barrel (503), a central column (504) with the same height is coaxially arranged at the center of the cylindrical barrel (503), a plurality of partition plates (501) are uniformly and fixedly connected between the central column (504) and the inner wall of the barrel (503), one adsorption area (502) is arranged between every two adjacent partition plates (501), and activated carbon is arranged in each adsorption area (502);

the upper side and the lower side of each adsorption area (502) are provided with separation nets (505);

the bottom edge of the cylinder body (503) is rotatably connected to the top of the base plate (506), an adsorption port (507) is formed in the outer side of the bottom of the base plate (506), and the size of the adsorption port (507) is matched with the size of the section of the adsorption area (502).

4. The device for monitoring the dew point of natural gas as claimed in claim 3, wherein the rotating mechanism (6) comprises a bottom plate (601), the top of the bottom plate (601) is rotatably connected with a rotating shaft (603) through a bracket (602), one side of the top of the bottom plate (601) is fixedly connected with an upright (604) which is perpendicular to the bottom plate (601), one end of the rotating shaft (603) is rotatably connected to the inner side of the upright (604), and one end of the rotating shaft (603) far away from the upright (604) is coaxially and fixedly connected with a rotating disc (605);

the outer side of the rotating shaft (603) is sleeved with one end of a first connecting rod (606), one end, far away from the rotating shaft (603), of the first connecting rod (606) is bent towards one side of the rotating shaft (603), and the inner side of the bent part of the first connecting rod (606) is hinged with the outer side of one end of a second connecting rod (607);

both ends of the second connecting rod (607) are bent towards the opposite side;

the outer side of one end, far away from the first connecting rod (606), of the second connecting rod (607) is hinged with one end of a rotating block (608), one side, far away from the second connecting rod (607), of the rotating block (608) is fixedly connected with the outer side of the bottom of a third connecting rod (609), and the third connecting rod (609) is perpendicular to the bottom plate (601);

the top and the center of the vertical rod (604) are respectively provided with a supporting plate (610) and a fixing plate (611) which are perpendicular to the vertical rod (604), and two sides of the third connecting rod (609) are respectively connected with the supporting plate (610) and the fixing plate (611) in a rotating manner;

the rotating block (608) is positioned below the fixed plate (611) and is close to the bottom of the fixed plate (611);

the side, away from the third connecting rod (609), of the rotating block (608) inclines towards the bottom plate (601).

5. The device for monitoring the dew point of natural gas as claimed in claim 4, wherein the base plate (506) is a ring structure with a closed bottom, the center of the bottom of the base plate (506) is fixedly connected with the top of the supporting plate (610), and the bottom edge of the barrel (503) is rotatably connected with the top edge of the ring part of the base plate (506);

the third connecting rod (609) is coincident with the central axis of the chassis (506), and the top end of the third connecting rod (609) penetrates through the supporting plate (610) and the bottom of the chassis (506) to be positioned inside the chassis (506);

the top end of the third connecting rod (609) is coaxially and fixedly connected with a tray (612), the top of the tray (612) is fixedly connected with the bottom of the central column (504), and the central axis of the central column (504) is coincided with the central axis of the tray (612).

6. The device for monitoring the dew point of natural gas in an online manner according to claim 5, wherein a transmission disc (11) is coaxially sleeved on an output shaft of the motor (9), and a transmission belt (12) is sleeved between the transmission disc (11) and the rotating disc (605).

7. The on-line natural gas dew point monitoring device according to claim 3, wherein a cover plate (508) is arranged at the top of each adsorption area (502), and a discharge port (509) is arranged on the cover plate (508) corresponding to each adsorption area (502).

8. The device for monitoring the dew point of natural gas in an online manner according to claim 7, wherein an installation box (13) is fixedly connected to the online dew point meter (1), and the sample gas processing components are fixed in the installation box (13).

9. An on-line natural gas dew point monitoring device as claimed in claim 8 wherein the top of each vent (509) is located outside the installation box (13).

10. The device for monitoring the dew point of natural gas in the online manner as claimed in claim 1, wherein an automatic control terminal is arranged in the online dew point meter (1), and the automatic control terminal is electrically connected with the online dew point meter (1) and a driving part of the sample gas processing component.

Technical Field

The invention relates to the technical field of natural gas application, in particular to a device for monitoring a natural gas dew point on line.

Background

In the natural gas purification treatment trade, the natural gas dew point is very critical parameter, the operating rate of device is directly related to the height of dew point, therefore, the natural gas dew point must be mastered at any time, at present, the sampling hole that adopts on-line dew point appearance to connect on the natural gas conveying pipeline in the trade mostly carries out monitoring often, the sample gas of collection is because the volume is less, the event is handled by the mode that directly discharges basically, but dew point monitoring is most constantly going on in the natural gas purification trade in all weather, although the natural gas belongs to clean energy and still has a small amount of harmful gas, the emission of on-line dew point appearance monitoring with sample gas day and month is still can cause harmful effects to surrounding environment and operating personnel. At present, although the sample gas for monitoring and other parts need to be treated to carry out unified combustion treatment on the natural gas, the method has the problem of inconvenient pipeline connection, and the natural gas after combustion still has a small amount of harmful gases such as sulfides, so that the harmful gases cannot be eliminated fundamentally, and in addition, because the content of the harmful gases after combustion is low, the adsorption carbon box is difficult to arrange effectively and reasonably by adopting activated carbon for adsorption treatment.

Therefore, how to solve the above technical problems becomes the subject of the present invention.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides the natural gas dew point online monitoring device which can effectively and uninterruptedly process the discharged monitoring sample gas of the natural gas online dew point instrument.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a natural gas dew point online monitoring device which comprises an online dew point instrument, wherein an air inlet of the online dew point instrument is communicated with a pipeline sampling port, and an air outlet of the online dew point instrument is communicated with a sample gas processing part;

the sample gas processing component comprises a collecting bottle of which the input end is communicated with the gas outlet, the output end of the collecting bottle is communicated with the input end of the burner, the combustion part of the burner is positioned in the combustion chamber, and the gas output end of the combustion chamber is communicated with the input end of the adsorption carbon box;

the adsorption carbon box is divided into a plurality of adsorption areas by a plurality of partition plates and is connected with a rotating mechanism.

The number of the collecting bottles is two, and a natural gas compressor is arranged on each collecting bottle;

the gas outlet is communicated with an inlet of a three-way valve, two outlets of the three-way valve are respectively communicated with the input end of the natural gas compressor on one collecting bottle, the output end of the natural gas compressor is communicated with the input end of the collecting bottle, and the output end of each collecting bottle is communicated with the input end of the combustor;

and a switch rotating shaft of the three-way valve is coaxially and fixedly connected with an output shaft of the motor.

The gas output end of the combustion cavity is communicated with the input end of the adsorption carbon box through a coil pipe;

the adsorption carbon box comprises a cylindrical barrel, a central column with the same height is coaxially arranged at the center of the cylindrical barrel, a plurality of partition plates are uniformly and fixedly connected between the central column and the inner wall of the barrel, one adsorption area is arranged between every two adjacent partition plates, and activated carbon is arranged in each adsorption area;

the upper side and the lower side of each adsorption area are provided with separation nets;

the bottom edge of the barrel is rotatably connected to the top of the chassis, an adsorption port is formed in the outer side of the bottom of the chassis, and the size of the adsorption port is matched with the size of the cross section of the adsorption area.

The rotating mechanism comprises a bottom plate, the top of the bottom plate is rotatably connected with a rotating shaft through a support, one side of the top of the bottom plate is fixedly connected with an upright rod perpendicular to the bottom plate, one end of the rotating shaft is rotatably connected to the inner side of the upright rod, and one end of the rotating shaft, far away from the upright rod, is coaxially and fixedly connected with a turntable;

the outer side of the rotating shaft is sleeved with one end of a first connecting rod, one end of the first connecting rod, which is far away from the rotating shaft, is bent towards one side of the rotating shaft, and the inner side of the bent part of the first connecting rod is hinged with the outer side of one end of a second connecting rod;

both ends of the second connecting rod are bent towards the opposite side;

the outer side of one end, far away from the first connecting rod, of the second connecting rod is hinged with one end of a rotating block, one side, far away from the second connecting rod, of the rotating block is fixedly connected with the outer side of the bottom of a third connecting rod, and the third connecting rod is perpendicular to the chassis;

the top and the center of the upright are respectively provided with a supporting plate and a fixed plate which are perpendicular to the upright, and two sides of the third connecting rod are respectively connected with the supporting plate and the fixed plate in a rotating way;

the rotating block is positioned below the fixed plate and is close to the bottom of the fixed plate;

the rotating block is far away from the third connecting rod and inclines towards the direction of the bottom plate.

The bottom plate is of an annular structure with a closed bottom, the center of the bottom plate is fixedly connected with the top of the supporting plate, and the bottom edge of the cylinder body is rotatably connected with the top edge of the annular part of the bottom plate;

the third connecting rod is superposed with the central axis of the chassis, and the top end of the third connecting rod penetrates through the supporting plate and the bottom of the chassis to be positioned on the inner side of the chassis;

the top end of the third connecting rod is coaxially and fixedly connected with a tray, the top of the tray is fixedly connected with the bottom of the central column, and the central axis of the central column coincides with the central axis of the tray.

The output shaft of the motor is coaxially sleeved with a transmission disc, and a transmission belt is sleeved between the transmission disc and the rotary disc.

Every the top in adsorption zone all is provided with the apron, corresponds every the adsorption zone is in all be provided with the discharge port on the apron.

The online dew point hygrometer is fixedly connected with an installation box, and the sample gas processing part is fixed in the installation box.

The top of each discharge port is located outside the installation box.

And an automatic control terminal is arranged in the online dew point instrument and is electrically connected with the online dew point instrument and a driving piece of the sample gas processing part.

When the invention is actually used: firstly, connecting an air inlet of an online dew point instrument with a sampling port of a gas transmission pipeline, fixing the device, starting the device to enter an operating state, driving a three-way valve by a motor to communicate a gas outlet with a collecting bottle, compressing gas by a natural gas compressor and then entering the collecting bottle, regularly collecting the gas to be full, starting a motor to reversely communicate the other collecting bottle with the gas outlet, simultaneously, starting the first collecting bottle to discharge natural gas to enter a burner for combustion treatment, gradually cooling the combusted gas from a combustion chamber through a coil pipe and then discharging the gas into an adsorption port of an adsorption carbon box under the action of a fan, wherein the adsorption port only faces one adsorption zone, the amount of active carbon in each adsorption zone corresponds to the treatment amount of gas in one gas cylinder, performing harmless discharge through a discharge port after the adsorption action of the active carbon in the current adsorption zone, and waiting for the collection time of a second collecting bottle after the gas in the current exhaust collecting bottle is treated, the motor starts and collects first receiving flask with the gas outlet intercommunication again after the second receiving flask is collected and is accomplished, and the motor rotates simultaneously and drives the driving disc and rotate, and the driving disc passes through the drive belt and drives slewing mechanism, and slewing mechanism then drives the rotation of adsorption carbon box, corresponds the adsorption port with a new adsorption zone and prepares to handle and collect natural gas in the full receiving flask.

Wherein the working process of the rotating mechanism is as follows: when the three-way valve is switched in a reverse direction by the motor, the adsorption carbon box is still driven by the process to continue rotating according to the previous rotating direction without rotating in the reverse direction.

The invention has the beneficial effects that:

1. the invention carries out combustion and adsorption treatment on the natural gas for monitoring by the online dew point detector, and achieves pollution-free discharge;

2. the integral device and the online dew point meter are integrally designed, so that the occupied space is small, and the installation and the use are convenient;

3. the natural gas is compressed and then collected, so that the occupied space of the collecting bottles is greatly reduced, the collecting time of the collecting bottles is prolonged, and the two collecting bottles are arranged for alternative collecting treatment, so that the continuous work of the whole device is not influenced;

4. the adsorption carbon box is designed to be a rotatable structure with a plurality of adsorption areas, so that the adsorption efficiency of the activated carbon is increased, the service life of the adsorption carbon box is prolonged, and the activated carbon can be conveniently replaced in different areas according to the service conditions;

5. the motor of the switching three-way valve synchronously provides rotating power for the adsorption carbon box, and the rotation mechanism ensures that the adsorption carbon box rotates towards the same direction every time the valve is switched, the rotation direction of the adsorption carbon box cannot be changed due to the positive and negative rotation of the motor, the gas treatment in the collecting bottle used at the current stage is synchronously ensured to correspond to a new adsorption area, no additional power source is required to be provided for the rotation mechanism, the synchronism and the economy are good, and the space occupied by the whole device is saved.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a front view of the interior of the mounting box of the present invention.

Fig. 3 is a top view of the interior of the mounting box of the present invention.

Fig. 4 is a schematic perspective view of the inside of the installation box of the present invention.

FIG. 5 is a schematic view of the interior of the adsorption carbon box of the present invention.

Fig. 6 is a schematic perspective view of the rotating mechanism of the present invention.

Wherein the reference numerals are: 1. an online dew point meter; 101. an air inlet; 102. an air outlet; 2. a collection bottle; 3. a burner; 4. a combustion chamber; 5. an adsorption carbon box; 501. a partition plate; 502. an adsorption zone; 503. a barrel; 504. a central column; 505. separating the net; 506. a chassis; 507. an adsorption port; 508. a cover plate; 509. a discharge port; 6. A rotating mechanism; 601. a base plate; 602. A support; 603. a rotating shaft; 604. erecting a rod; 605. a turntable; 606. a first link; 607. a second link; 608. rotating the block; 609. a third link; 610. a support plate; 611. a fixing plate; 612. a tray; 7. a natural gas compressor; 8. a three-way valve; 801. a switch rotating shaft; 9. a motor; 10. a coil pipe; 11. a drive plate; 12. a drive belt; 13. and (5) installing a box.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

Referring to fig. 1 to 6, the invention discloses a natural gas dew point online monitoring device, which comprises an online dew point meter 1, wherein an air inlet 101 of the online dew point meter 1 is communicated with a pipeline sampling port, an air outlet 102 of the online dew point meter 1 is communicated with a sample gas processing component, the sample gas processing component comprises a collecting bottle 2, the input end of the collecting bottle is communicated with the air outlet 102, the output end of the collecting bottle 2 is communicated with the input end of a combustor 3, a combustion part of the combustor 3 is positioned in a combustion chamber 4, the gas output end of the combustion chamber 4 is communicated with the input end of an adsorption carbon box 5, the adsorption carbon box 5 is divided into a plurality of adsorption areas 502 through a plurality of partition plates 501, the adsorption carbon box 5 is connected with a rotating mechanism 6, an automatic control terminal is arranged in the online dew point meter 1, and the automatic control terminal is electrically connected with a driving piece of the online dew point meter 1 and the sample gas processing component.

The collecting bottle 2 is two, all is provided with natural gas compressor 7 on every collecting bottle 2, gas outlet 102 and three way valve 8's entry intercommunication, two exports of three way valve 8 respectively with the natural gas compressor 7 input intercommunication on a collecting bottle 2, natural gas compressor 7's output and collecting bottle 2 input intercommunication, every collecting bottle 2 output all with 3 input intercommunications of combustor, three way valve 8's switch pivot 801 and the coaxial fixed connection of output shaft of motor 9.

The gas output end of the combustion cavity 4 is communicated with the input end of the adsorption carbon box 5 through a coil pipe 10, the adsorption carbon box 5 comprises a cylindrical barrel 503, a central column 504 with the same height is coaxially arranged at the center of the cylindrical barrel 503, a plurality of partition plates 501 are uniformly and fixedly connected between the central column 504 and the inner wall of the barrel 503, an adsorption area 502 is arranged between every two adjacent partition plates 501, activated carbon is arranged in each adsorption area 502, partition nets 505 are arranged on the upper side and the lower side of each adsorption area 502, the bottom of the barrel 503 is rotatably connected to the top of a chassis 506, an adsorption port 507 is arranged on the outer side of the bottom of the chassis 506, the size of the adsorption port 507 is matched with the cross-sectional size of the adsorption area 502, a cover plate 508 is arranged on the top of each adsorption area 502, a discharge port 509 is arranged on the cover plate 508 corresponding to each adsorption area 502, an installation box 13 is fixedly connected with the online dew-point instrument 1, and a sample gas processing component is fixed in the installation box 13, the top of each drain 509 is located outside the mounting box 13.

The rotating mechanism 6 comprises a bottom plate 601, the top of the bottom plate 601 is rotatably connected with a rotating shaft 603 through a bracket 602, one side of the top of the bottom plate 601 is fixedly connected with a vertical rod 604 which is perpendicular to the bottom plate 601, one end of the rotating shaft 603 is rotatably connected with the inner side of the vertical rod 604, one end of the rotating shaft 603 which is far away from the vertical rod 604 is coaxially and fixedly connected with a rotating disc 605, the outer side of the rotating shaft 603 is sleeved with one end of a first connecting rod 606, one end of the first connecting rod 606 which is far away from the rotating shaft 603 is bent towards one side of the rotating shaft 603, the inner side of the bent part of the first connecting rod 606 is hinged with the outer side of one end of a second connecting rod 607, both ends of the second connecting rod 607 are bent towards the opposite side, the outer side of one end of the second connecting rod 607 is hinged with one end of a rotating block 608, one side of the rotating block 608 which is far away from the second connecting rod 607 is fixedly connected with the outer side of the bottom of a third connecting rod 609, the third connecting rod 609 is perpendicular to the bottom plate 601, the top and the center of the vertical rod 604 are respectively provided with a supporting plate 610 and a fixing plate 611 which are perpendicular to the vertical rod 604, two sides of the third connecting rod 609 are respectively rotatably connected to the supporting plate 610 and the fixing plate 611, the rotating block 608 is located below the fixing plate 611 and close to the bottom of the fixing plate 611, one side of the rotating block 608, which is far away from the third connecting rod 609, is inclined towards the direction of the bottom plate 601, an output shaft of the motor 9 is coaxially sleeved with a transmission disc 11, and a transmission belt 12 is sleeved between the transmission disc 11 and the rotating disc 605.

The bottom plate 506 is of an annular structure with a closed bottom, the center of the bottom plate 506 is fixedly connected with the top of the supporting plate 610, the bottom edge of the cylinder body 503 is rotatably connected with the top edge of the annular part of the bottom plate 506, the third connecting rod 609 is overlapped with the central axis of the bottom plate 506, the top end of the third connecting rod 609 penetrates through the supporting plate 610 and the bottom of the bottom plate 506 and is positioned on the inner side of the bottom plate 506, the top end of the third connecting rod 609 is coaxially and fixedly connected with a tray 612, the top of the tray 612 is fixedly connected with the bottom of the central column 504, and the central axis of the central column 504 is overlapped with the central axis of the tray 612.

When the invention is actually used: firstly, an air inlet 101 of an online dew point meter 1 is connected with a sampling port of a gas transmission pipeline and is started to enter an operating state after a fixing device is fixed, a motor 9 drives a three-way valve 8 to communicate a gas outlet 102 with one collecting bottle 2, gas enters the collecting bottle 2 after being compressed by a natural gas compressor 7, after the gas is collected fully at regular time, the motor 9 is started to rotate reversely to communicate the other collecting bottle 2 with the gas outlet 102, meanwhile, the first collecting bottle 2 starts to discharge natural gas to enter a burner 3 for burning treatment, the burnt gas is gradually cooled by a burning cavity 4 through a coil pipe 10 and then is discharged into an adsorption port 507 of an adsorption carbon box 5 under the action of a fan, at the moment, the adsorption port 507 only faces one adsorption zone 502, the amount of active carbon in each adsorption zone 502 corresponds to the treatment amount of gas in one gas cylinder, the activated carbon in the current adsorption zone 502 is harmlessly discharged through a discharge port 509 after the adsorption action of the active carbon in the current adsorption zone 2, until the gas in the current exhaust collecting bottle 2 waits for the collection time after the gas is treated, after the second collecting bottle 2 is collected and is accomplished motor 9 starts and collects first collecting bottle 2 with gas outlet 102 intercommunication again, and motor 9 rotates simultaneously and drives driving disc 11 and rotate, and driving disc 11 passes through drive belt 12 and drives slewing mechanism 6, and slewing mechanism 6 then drives adsorption carbon box 5 and rotates, corresponds the adsorption of a new adsorption zone 502 and adsorbs mouthful 507 and prepare to handle the full natural gas in the collecting bottle 2 of collection.

The working process of the rotating mechanism 6 is as follows: when the three-way valve 8 is switched by the motor 9 once, the turntable 605 is driven to rotate once, and the three-way valve is rotated alternately in two directions, the turntable 605 drives the rotating shaft 603 to rotate, the rotating shaft 603 drives the first connecting rod 606 to rotate, the first connecting rod 606 drives the second connecting rod 607 to rotate, the second connecting rod 607 drives the third connecting rod 609 to rotate through the rotating block 608, the third connecting rod 609 drives the tray 612 to rotate, the side of the tray 612 drives the adsorption carbon box 5 to rotate by a certain angle so that a new adsorption area 502 corresponds to the adsorption port 507, when the three-way valve 8 is switched by the motor 9 in a reverse direction, the adsorption carbon box 5 is still driven to continue to rotate according to the previous rotating direction without rotating in the reverse direction.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.