阅读说明：本技术 一种处理有机废气VOCs的装置及工艺 (Device and process for treating organic waste gas VOCs ) 是由 刘勇华 吴京 徐玉凤 于 2021-06-29 设计创作，主要内容包括：本发明提供一种处理有机废气VOCs的装置及工艺,所述处理有机废气VOCs的装置,包括第一处理箱和第二处理箱,所述第一处理箱的左侧连通有废气进管,所述第一处理箱内壁的两侧之间固定连接有滤板,所述第一处理箱和所述第二处理箱相对的一侧之间连通有导管,所述导管上设置有吸泵,所述第二处理箱内壁的两侧均设置有净化机构,所述第二箱体内壁的底部固定连接有防护框,所述防护框内壁的底部设置有灯组开关。本发明提供的处理有机废气VOCs的装置及工艺,通过对净化分解后的废气进行检测,能够确保废气是否净化分解彻底,同时将净化不彻底的废气进行再次净化分解,保证废气能够被完全净化分解,不会造成污染。(The invention provides a device and a process for treating organic waste gas VOCs, wherein the device comprises a first treatment box and a second treatment box, the left side of the first treatment box is communicated with a waste gas inlet pipe, a filter plate is fixedly connected between two sides of the inner wall of the first treatment box, a guide pipe is communicated between one opposite sides of the first treatment box and the second treatment box, a suction pump is arranged on the guide pipe, two sides of the inner wall of the second treatment box are respectively provided with a purification mechanism, the bottom of the inner wall of the second box is fixedly connected with a protection frame, and the bottom of the inner wall of the protection frame is provided with a lamp group switch. According to the device and the process for treating the organic waste gas VOCs, provided by the invention, through detecting the purified and decomposed waste gas, whether the waste gas is purified and decomposed thoroughly can be ensured, and meanwhile, the waste gas which is not purified thoroughly is purified and decomposed again, so that the waste gas can be completely purified and decomposed, and pollution can not be caused.)

1. The utility model provides a handle device of organic waste gas VOCs, includes that first processing case and second handle the case, its characterized in that: the left side of the first treatment box is communicated with a waste gas inlet pipe, a filter plate is fixedly connected between two sides of the inner wall of the first treatment box, a guide pipe is communicated between one opposite sides of the first treatment box and the second treatment box, a suction pump is arranged on the guide pipe, purifying mechanisms are arranged on two sides of the inner wall of the second treatment box, a protective frame is fixedly connected to the bottom of the inner wall of the second treatment box, a lamp group switch is arranged at the bottom of the inner wall of the protective frame, a sliding plate is slidably connected between the top and the bottom of the inner wall of the protective frame, a connecting plate is fixedly connected to the left side of the sliding plate, the left side of the connecting plate penetrates through the protective frame and extends to the left side of the protective frame, a support frame is fixedly connected to the left side of the connecting plate, the bottom of the support frame is slidably connected to the bottom of the inner wall of the second treatment box, and a cover plate is fixedly connected to the left side of the support frame, the right side fixedly connected with mounting panel of sliding plate, the bottom fixedly connected with shifting block of mounting panel, the right side of sliding plate with be provided with reset spring between the right side of protective frame inner wall, fixed frame has been run through at the top of second processing case, the bottom of fixed frame is the open-ended, fixedly connected with fixed plate between the both sides of fixed frame inner wall, the bottom of fixed plate is provided with VOCs concentration detection head, the top of fixed frame is provided with the controller, the right side intercommunication of fixed frame has the waste gas exit tube, be provided with first automatically controlled valve on the waste gas exit tube, the left side intercommunication of fixed frame has the waste gas return pipe, be provided with the second automatically controlled valve on the waste gas return pipe, the other end of waste gas return pipe with first processing case intercommunication.

2. The apparatus according to claim 1, wherein the cover plate is adapted to fit the conduit.

3. The apparatus of claim 1, wherein the purification mechanism comprises a photolysis assembly and a catalyst assembly, the photolysis assembly being disposed adjacent to the catalyst assembly.

4. The apparatus according to claim 1, wherein the inlet pipe is provided with a control valve.

5. The device for treating organic waste gases VOCs according to claim 1, wherein the right side of the filter plate is inclined downwards, the right side of the inner wall of the first treatment tank is provided with an open slot, the right side of the first treatment tank is slidably connected with a sealing baffle plate, the right side of the first treatment tank is fixedly connected with a fixed block, the bottom of the fixed block is fixedly connected with an electric telescopic rod, and the bottom end of the electric telescopic rod is fixed at the top of the sealing baffle plate.

6. The apparatus according to claim 5, wherein the sealing baffle is L-shaped and fits into the open trough.

7. The device for treating organic waste gases VOCs according to claim 1, wherein two limit blocks are fixedly connected to the left side of the inner wall of the first treatment tank, a support block is fixedly connected to the right side of the inner wall of the first treatment tank, the filter plate is placed between the two limit blocks and the support block, a sealing gasket is arranged around the filter plate, and grooves are formed in both sides of the inner wall of the first treatment tank.

8. The apparatus of claim 7, wherein the groove is adapted to the gasket.

9. The apparatus for treating organic waste gases VOCs according to claim 7, wherein the first treatment tank is provided with a door panel on the front side, and the door panel is provided with a lock catch.

10. A process for treating organic waste gases VOCs, comprising the apparatus for treating organic waste gases VOCs according to any one of claims 1 to 9, wherein the apparatus for treating organic waste gases VOCs is used in a process for treating organic waste gases VOCs, comprising the steps of:

s1, filtering waste gas, introducing the waste gas into the first treatment box through a waste gas inlet pipe, and filtering particulate matters out of the waste gas through a filter plate;

s2, waste gas purification, namely introducing the waste gas into a second treatment box through an absorption pump, and then performing photolysis purification on the waste gas through opening a purification mechanism;

s3, exhaust-gas detection, the waste gas after the purification passes through the VOCs concentration detection head and detects, judges whether this waste gas purifies thoroughly, if purify thoroughly then discharge through the waste gas exit tube, if purify not thoroughly then carry to first processing case through the waste gas return pipe and purify once more.

Technical Field

The invention relates to the field of organic waste gas VOCs treatment, in particular to a device and a process for treating organic waste gas VOCs.

Background

Organic waste gases are a common name for VOCs, which are acronyms for volatile organic compounds (VOLATILE organic Compounds). There are many definitions, such as the relatively influential ASTM D3960-98 standard in the united states and the definition of Total Volatile Organic Compounds (TVOC) by the world health organization (WHO,1989) are also different. The definition of VOCs volatile organic compounds in China refers to organic compounds with saturated vapor pressure of more than 70Pa at normal temperature and boiling point of 260 ℃ below under normal pressure, or all organic compounds with corresponding volatility and vapor pressure of more than or equal to 10Pa at 20 ℃.

The current common VOCs waste gas treatment technology is divided into a recovery technology and a destruction technology. Wherein, the recovery technology aims at high concentration, particularly more than 5000mg/m or more expensive VOCs, and the commonly used recovery technology mainly comprises adsorption, absorption, condensation, membrane technology and the like; aiming at the standard emission of waste gas of most enterprises, most of the waste gas is destroyed by adopting the technologies, which mainly comprise combustion, photocatalysis, biodegradation, plasma technologies and the like.

In the related art, when the treatment is performed by photocatalysis, the VOCs waste gas is decomposed by the photolysis lamp bank and the catalyst plate bank, but when the decomposition is performed, the decomposition of the VOCs waste gas may not be thorough due to uncertain factors such as gaps between the photolysis lamp banks and waste gas flowing.

Therefore, it is necessary to provide a device and a process for treating organic waste gases VOCs to solve the above problems.

Disclosure of Invention

The invention provides a device and a process for treating organic waste gas VOCs, which solve the problem that the VOCs waste gas decomposition is possibly not thorough.

In order to solve the technical problems, the device for treating organic waste gases VOCs provided by the invention comprises a first treatment box and a second treatment box, wherein the left side of the first treatment box is communicated with a waste gas inlet pipe, a filter plate is fixedly connected between two sides of the inner wall of the first treatment box, a guide pipe is communicated between one opposite sides of the first treatment box and the second treatment box, a suction pump is arranged on the guide pipe and is connected with an external power supply through a control switch, two sides of the inner wall of the second treatment box are respectively provided with a purification mechanism, the bottom of the inner wall of the second treatment box is fixedly connected with a protective frame, the bottom of the inner wall of the protective frame is provided with a lamp set switch which is electrically connected with the purification mechanism, a sliding plate is connected between the top and the bottom of the inner wall of the protective frame in a sliding manner, the left side of the sliding plate is fixedly connected with a connecting plate, and the left side of the connecting plate penetrates through the protective frame and extends to the left side of the protective frame, the left side of the connecting plate is fixedly connected with a supporting frame, the bottom of the supporting frame is slidably connected with the bottom of the inner wall of the second treatment box, the left side of the supporting frame is fixedly connected with a cover plate, the right side of the sliding plate is fixedly connected with a mounting plate, the bottom of the mounting plate is fixedly connected with a shifting block, a reset spring is arranged between the right side of the sliding plate and the right side of the inner wall of the protective frame, a fixed frame penetrates through the top of the second treatment box, the bottom of the fixed frame is open, a fixed plate is fixedly connected between the two sides of the inner wall of the fixed frame, a VOCs concentration detection head is arranged at the bottom of the fixed plate and is electrically connected with a controller, the top of the fixed frame is provided with a controller, the controller is electrically connected with a first electric control valve and a second electric control valve, the right side of the fixed frame is communicated with an exhaust gas outlet pipe, and the exhaust gas outlet pipe is provided with a first electric control valve, the left side intercommunication of fixed frame has the waste gas return pipe, be provided with the second automatically controlled valve on the waste gas return pipe, the other end of waste gas return pipe with first processing case intercommunication.

Preferably, the cover plate is fitted to the duct.

Preferably, the purification mechanism includes a photolysis assembly and a catalyst assembly, the photolysis assembly being arranged adjacent to the catalyst assembly.

Preferably, the waste gas inlet pipe is provided with a control valve.

Preferably, the right side downward sloping of filter plate, the open slot has been seted up on the first right side of handling the incasement wall, the first right side sliding connection who handles the case has seal baffle, the first right side fixedly connected with fixed block of handling the case, the bottom fixedly connected with electric telescopic handle of fixed block, electric telescopic handle pass through control switch and are connected with external power source, electric telescopic handle's bottom mounting is in seal baffle's top.

Preferably, the sealing baffle is L-shaped, and the sealing baffle is matched with the opening groove.

Preferably, two limit blocks are fixedly connected to the left side of the first treatment box inner wall, a supporting block is fixedly connected to the right side of the first treatment box inner wall, the filter plates are placed between the two limit blocks and the supporting block, sealing gaskets are arranged around the filter plates, and grooves are formed in the two sides of the first treatment box inner wall.

Preferably, the groove is matched with the sealing gasket.

Preferably, the front surface of the first treatment box is provided with a door plate, and the door plate is provided with a lock catch.

A process for treating organic waste gas VOCs comprises the device for treating the organic waste gas VOCs, wherein the device for treating the organic waste gas VOCs needs to be used for treating the process for treating the organic waste gas VOCs when in use, and comprises the following steps:

s1, filtering waste gas, introducing the waste gas into the first treatment box through a waste gas inlet pipe, and filtering particulate matters out of the waste gas through a filter plate;

s2, waste gas purification, namely introducing the waste gas into a second treatment box through an absorption pump, and then performing photolysis purification on the waste gas through opening a purification mechanism;

s3, exhaust-gas detection, the waste gas after the purification passes through the VOCs concentration detection head and detects, judges whether this waste gas purifies thoroughly, if purify thoroughly then discharge through the waste gas exit tube, if purify not thoroughly then carry to first processing case through the waste gas return pipe and purify once more.

Compared with the related technology, the device and the process for treating the organic waste gas VOCs provided by the invention have the following beneficial effects:

the invention provides a device and a process for treating organic waste gas VOCs, wherein the waste gas is guided into a first treatment box through a waste gas inlet pipe, the particulate matters in the waste gas are removed through the filtration of a filter plate, the waste gas is pre-treated, then the waste gas is guided into a second treatment box through a guide pipe by the starting of an absorption pump, when the right end of the guide pipe in the waste gas is discharged, a cover plate is retreated, so that a support frame moves rightwards, a connecting plate is driven to move rightwards, a sliding plate moves rightwards, a mounting plate moves rightwards, a shifting block is driven to move rightwards, a lamp group switch is turned on by shifting the lamp group switch, a purification mechanism is turned on, the waste gas is purified and decomposed, the purified and decomposed waste gas is discharged into a fixed frame, the purified and decomposed waste gas is detected through a VOCs concentration detection head, if the purification is thorough, the VOCs concentration detection head feeds back signals to a controller, the first automatically controlled valve of controller control is opened, the second automatically controlled valve is closed, make waste gas pass through the waste gas exit tube and discharge, if purify not thoroughly, VOCs concentration detection head feeds back the signal to the controller, the first automatically controlled valve of controller control is closed, the second automatically controlled valve is opened, make waste gas pass through the waste gas return pipe and input first processing incasement recirculation and handle, detect through the waste gas after decomposing the purification, can ensure whether waste gas purifies the decomposition thoroughly, simultaneously will purify the decomposition once more with the incomplete waste gas of purifying, guarantee that waste gas can be purified and decomposed completely, can not cause the pollution.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of an apparatus for treating VOCs in organic waste gas provided by the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

figure 3 is a bottom view of the fixing frame shown in figure 1;

FIG. 4 is a schematic structural diagram of a second embodiment of an apparatus for treating VOCs in organic waste gas according to the present invention;

FIG. 5 is a front view of the first treatment tank shown in FIG. 4;

reference numbers in the figures: 1. a first treatment tank; 2. a second treatment tank; 3. an exhaust gas inlet pipe; 4. filtering the plate; 5. a conduit; 6. a suction pump; 7. a purification mechanism; 71. a photolytic lamp assembly; 72. a catalyst assembly; 8. a protective frame; 9. a lamp group switch; 10. a sliding plate; 11. a connecting plate; 12. a support frame; 13. a cover plate; 14. mounting a plate; 15. shifting blocks; 16. a return spring; 17. a fixing frame; 18. a fixing plate; 19. a VOCs concentration detection head; 20. a controller; 21. an exhaust gas outlet pipe; 22. a first electrically controlled valve; 23. an exhaust gas return pipe; 24. a second electrically controlled valve; 25. a control valve; 26. an open slot; 27. sealing the baffle; 28. a fixed block; 29. an electric telescopic rod; 30. a limiting block; 31. a support block; 32. a gasket; 33. a groove; 34. a door panel; 35. and (5) locking.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

First embodiment

Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 is a schematic structural diagram of a device for treating organic waste gas VOCs according to a first embodiment of the present invention; FIG. 2 is an enlarged view of a portion of FIG. 1; fig. 3 is a bottom view of the fixing frame shown in fig. 1.

The device for treating organic waste gas VOCs comprises a first treatment box 1 and a second treatment box 2, wherein the left side of the first treatment box 1 is communicated with waste gas inlet pipes 3, filter plates 4 are fixedly connected between two sides of the inner wall of the first treatment box 1, the first treatment box 1 and one side of the second treatment box 2 opposite to each other are communicated with a guide pipe 5, a suction pump 6 is arranged on the guide pipe 5, purifying mechanisms 7 are arranged on two sides of the inner wall of the second treatment box 2, a protection frame 8 is fixedly connected to the bottom of the inner wall of the second treatment box 2, a lamp group switch 9 is arranged at the bottom of the inner wall of the protection frame 8, a sliding plate 10 is slidably connected between the top and the bottom of the inner wall of the protection frame 8, and a connecting plate 11 is fixedly connected to the left side of the sliding plate 10. The left side of connecting plate 11 runs through protection frame 8 and extends to the left side of protection frame 8, the left side fixedly connected with support frame 12 of connecting plate 11.

The bottom of the support frame 12 is slidably connected to the bottom of the inner wall of the second processing box 2, the left side of the support frame 12 is fixedly connected with a cover plate 13, the right side of the sliding plate 10 is fixedly connected with a mounting plate 14, the bottom of the mounting plate 14 is fixedly connected with a shifting block 15, a return spring 16 is arranged between the right side of the sliding plate 10 and the right side of the inner wall of the protective frame 8, a fixed frame 17 penetrates through the top of the second processing box 2, the bottom of the fixed frame 17 is open, a fixed plate 18 is fixedly connected between the two sides of the inner wall of the fixed frame 17, a VOCs concentration detection head 19 is arranged at the bottom of the fixed plate 18, a controller 20 is arranged at the top of the fixed frame 17, the right side of the fixed frame 17 is communicated with an exhaust gas outlet pipe 21, a first electric control valve 22 is arranged on the exhaust gas outlet pipe 21, and an exhaust gas return pipe 23 is communicated with the left side of the fixed frame 17, and a second electric control valve 24 is arranged on the waste gas return pipe 23, and the other end of the waste gas return pipe 23 is communicated with the first treatment box 1.

The first treatment box 1 and the second treatment box 2 are sealed box bodies.

The cover 13 is adapted to the conduit 5.

When the guide pipe 5 starts to convey waste gas, the cover plate 13 is pushed away, so that the connecting plate 11 indirectly moves rightwards, the sliding plate 10 moves rightwards, the mounting plate 14 moves rightwards to drive the shifting block 15 to move rightwards, the lamp group switch 9 is shifted to open the lamp group switch 9, the purification mechanism 7 is opened, the waste gas is purified and decomposed, a linkage effect can be achieved, and when the waste gas enters the second treatment box 2, the purification mechanism 7 starts to work.

The purification mechanism 7 includes a photolysis assembly 71 and a catalyst assembly 72, and the photolysis assembly 71 is arranged adjacent to the catalyst assembly 72.

The waste gas inlet pipe 3 is provided with a control valve 25.

Can control waste gas through setting up of control valve 25 and advance opening or closing of pipe 3 to can cut off the source of waste gas, make things convenient for the clearance of filter plate 4 filtration back particulate matter, make waste gas can not run out.

The right side downward sloping of filter plate 4, open slot 26 has been seted up on the right side of first processing case 1 inner wall, the right side sliding connection of first processing case 1 has seal baffle 27, the first right side fixedly connected with fixed block 28 of processing case 1, the bottom fixedly connected with electric telescopic handle 29 of fixed block 28, electric telescopic handle 29's bottom mounting is in seal baffle 27's top.

Through the shrink of electric telescopic handle 29 for sealed baffle 27 moves upwards, thereby makes open slot 26 open, and the particulate matter after being filtered passes through the direction of filter plate 4 tilting, can move to the right, thereby discharges through open slot 26, has made things convenient for the staff to clear up filter plate 4, and the condition that the reduction blockked up appears.

The sealing baffle plate 27 is L-shaped, and the sealing baffle plate 27 is matched with the open slot 26.

A process for treating organic waste gas VOCs comprises the device for treating the organic waste gas VOCs, wherein the device for treating the organic waste gas VOCs needs to be used for treating the process for treating the organic waste gas VOCs when in use, and comprises the following steps:

s1, filtering waste gas, introducing the waste gas into the first treatment box 1 through the waste gas inlet pipe 3, and filtering particulate matters out of the waste gas through the filter plate 4;

s2, waste gas purification, wherein the waste gas is introduced into the second treatment box 2 through the suction pump 6, and then the waste gas is photolytically purified through opening the purification mechanism 7;

s3, detecting waste gas, detecting the purified waste gas through the VOCs concentration detection head 19, judging whether the waste gas is completely purified, discharging the waste gas through the waste gas outlet pipe 21 if the waste gas is completely purified, and conveying the waste gas to the first treatment box 1 for purification again through the waste gas return pipe 23 if the waste gas is not completely purified.

The working principle of the device and the process for treating the organic waste gas VOCs provided by the invention is as follows:

waste gas is led into the first treatment box 1 through a waste gas inlet pipe 3, particles in the waste gas are removed through the filtration of a filter plate 4, the waste gas is pretreated, then the waste gas is led into the second treatment box 2 through a guide pipe 5 by starting a suction pump 6, when the right end of the guide pipe 5 in the waste gas is discharged, a cover plate 13 is retreated, a support frame 12 is driven to move rightwards, a connecting plate 11 is driven to move rightwards, a sliding plate 10 is driven to move rightwards, a mounting plate 14 is driven to move rightwards to drive a shifting block 15, a lamp group switch 9 is shifted to open a lamp group switch 9, a purification mechanism 7 is opened to purify and decompose the waste gas, the purified and decomposed waste gas is discharged into a fixed frame 17, the purified and decomposed waste gas is detected through a VOCs concentration detection head 19, if the purification is complete, the VOCs concentration detection head 19 feeds back a signal to a controller 20, controller 20 control first electric control valve 22 is opened, and second electric control valve 24 is closed for waste gas passes through exhaust gas outlet pipe 21 and discharges, if purify not thoroughly, and the VOCs concentration detection head 19 feeds back the signal to controller 20, and controller 20 control first electric control valve 22 closes, and second electric control valve 24 is opened, makes waste gas pass through waste gas return pipe 23 and inputs recirculation treatment in first treatment box 1.

Compared with the related technology, the device and the process for treating the organic waste gas VOCs provided by the invention have the following beneficial effects:

waste gas is led into the first treatment box 1 through a waste gas inlet pipe 3, particles in the waste gas are removed through the filtration of a filter plate 4, the waste gas is pretreated, then the waste gas is led into the second treatment box 2 through a guide pipe 5 by starting a suction pump 6, when the right end of the guide pipe 5 in the waste gas is discharged, a cover plate 13 is retreated, a support frame 12 is driven to move rightwards, a connecting plate 11 is driven to move rightwards, a sliding plate 10 is driven to move rightwards, a mounting plate 14 is driven to move rightwards to drive a shifting block 15, a lamp group switch 9 is shifted to open a lamp group switch 9, a purification mechanism 7 is opened to purify and decompose the waste gas, the purified and decomposed waste gas is discharged into a fixed frame 17, the purified and decomposed waste gas is detected through a VOCs concentration detection head 19, if the purification is complete, the VOCs concentration detection head 19 feeds back a signal to a controller 20, controller 20 controls first electric control valve 22 and opens, second electric control valve 24 closes, make waste gas discharge through exhaust outlet pipe 21, if purify not thoroughly, VOCs concentration detection head 19 feeds back the signal to controller 20, controller 20 controls first electric control valve 22 and closes, second electric control valve 24 opens, make waste gas pass through waste gas return pipe 23 and input recirculation treatment in first processing case 1, through detecting the waste gas after purifying and decomposing, can ensure whether waste gas purifies and decomposes thoroughly, purify the decomposition once more with the incomplete waste gas of purifying simultaneously, guarantee that waste gas can be purified and decomposed completely, can not cause the pollution.

Second embodiment

Referring to fig. 4-5, a second embodiment of the present application provides another apparatus for treating organic waste gases VOCs based on the apparatus for treating organic waste gases VOCs provided in the first embodiment of the present application. The second embodiment is only the preferred mode of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.

Specifically, the difference of the device that handles organic waste gas VOCs that the second embodiment of this application provided lies in, two stopper 30 of left side fixedly connected with of first processing case 1 inner wall, the first right side fixedly connected with supporting shoe 31 of handling case 1 inner wall, filter plate 4 places in two between stopper 30 and the supporting shoe 31, all be provided with sealed pad 32 around filter plate 4, the both sides of first processing case 1 inner wall are all seted up flutedly 33.

The groove 33 is adapted to the gasket 32.

The front surface of the first treatment box 1 is provided with a door plate 34, and the door plate 34 is provided with a lock catch 35.

Compared with the related technology, the device and the process for treating the organic waste gas VOCs provided by the invention have the following beneficial effects:

after the filter plate 4 blocks up, through manual opening door plant 34, can directly take out the filter plate 4 after blockking up, insert new filter plate 4 between two stopper 30 afterwards, the right side is taken on supporting shoe 31, the change after the filter plate 4 blocks up has been made things convenient for, the simple operation, the sealed pad 32 of filter plate 4 both sides is in the inside of two recesses 33, close the back when door plant 34, sealed pad 32 around the filter plate 4 extrudees with the front of first processing case 1 inner wall and the back of door plant 34 respectively, thereby the all-round leakproofness of having guaranteed.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.