CN210186720U - Boiler waste gas treatment device - Google Patents
Boiler waste gas treatment device Download PDFInfo
- Publication number
- CN210186720U CN210186720U CN201920412371.9U CN201920412371U CN210186720U CN 210186720 U CN210186720 U CN 210186720U CN 201920412371 U CN201920412371 U CN 201920412371U CN 210186720 U CN210186720 U CN 210186720U
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- Prior art keywords
- fixedly arranged
- plate
- air inlet
- spray
- chamber
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- 239000002912 waste gas Substances 0.000 title claims abstract description 28
- 239000007921 spray Substances 0.000 claims abstract description 39
- 239000007789 gas Substances 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 23
- 239000012535 impurity Substances 0.000 claims abstract description 23
- 238000004090 dissolution Methods 0.000 claims abstract description 12
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 6
- 239000000796 flavoring agent Substances 0.000 claims description 4
- 235000019634 flavors Nutrition 0.000 claims description 4
- 239000000428 dust Substances 0.000 abstract description 18
- 238000006477 desulfuration reaction Methods 0.000 abstract description 7
- 230000023556 desulfurization Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract description 2
- 239000002689 soil Substances 0.000 abstract description 2
- 238000004332 deodorization Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 9
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 239000008187 granular material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a boiler exhaust treatment device, including the device main part, operating panel, the air inlet, the edulcoration case, the gas outlet, the spray room, dissolve room and filter chamber, the utility model discloses a set up baffle and cleaning brush in one side of filter screen, can clear up the filter screen, prevent the filter screen jam, when the baffle descends simultaneously, can completely cut off accumulational dust and particle impurity and air inlet, then pump to the edulcoration incasement through the soil pick-up pump, need not shut down, can clear up the dust, the purification treatment efficiency has been guaranteed, be provided with cleaning device in the spray room, can push away the impurity that remains on the filter to the waste residue incasement, further guarantee equipment normal operating, drive the (mixing) shaft through the motor and rotate, make waste gas and dissolve the liquid contact more abundant, the dissolution efficiency is further improved, waste gas after multichannel process is handled is through desulfurization process, After denitration and deodorization treatment, the waste gas is discharged, so that the waste gas treatment effect is better.
Description
Technical Field
The utility model relates to an air purification dust collecting equipment technical field, in particular to boiler exhaust treatment device.
Background
The boiler is a mechanical device which utilizes the heat energy of fuel or other energy sources to heat water or medium and output the heat energy for the production and living needs of people, the waste gas containing smoke dust, sulfur dioxide, carbon dioxide and the like generated by the combustion of the fuel in the production process of the existing boiler is directly discharged into the air through a chimney, the smoke discharge temperature is generally not lower than 180 ℃ and can reach 250 ℃, the discharge of the high-temperature waste gas not only causes a great deal of heat energy waste, but also causes the atmospheric pollution represented by the smoke dust and the sulfur dioxide, and research results show that the total death rate is increased by 1l when the concentration of the sulfur dioxide in the atmosphere is increased by 1 time; when the concentration of the total suspended particulate matter is increased by 1 time, the total death rate is increased by 4 percent; and excessive emission of carbon dioxide may cause a global warming phenomenon. The waste gas refers to toxic and harmful gas discharged by human in the production and living process. Especially chemical plants, steel plants, pharmaceutical plants, coking plants and oil refineries, etc., the discharged waste gas has large odor, seriously pollutes the environment and affects the human health. The waste gas contains a large amount of harmful gases, and the waste gas needs to be discharged after decontamination.
At present, some boilers on the market adopt desulfurization dust remover to remove dust, can effectively desulfurize, but other harmful substance still can not effective absorption, the smoke and dust of emission still can not reach national standard, all caused certain pollution to company and all the surrounding environment, some equipment can set up the filter screen at the air inlet in order to intercept great granule in the waste gas in addition, after long-time the use, dust and granule impurity can be piled up in one side of filter screen, thereby block up the filter screen, influence the equipment and use, when shutting down when handling dust and granule impurity, influence the treatment effeciency of waste gas, consequently, it solves these problems to need to design a boiler exhaust treatment device.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a boiler exhaust treatment device can effectively solve the problem in the background art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a boiler waste gas treatment device comprises a device main body, an operation panel, an air inlet, an impurity removing box, an air outlet, a spray chamber, a dissolving chamber and a filtering chamber, wherein the left end of the device main body is fixedly provided with the air inlet, the right end of the device main body is fixedly provided with the air outlet, the impurity removing box is fixedly arranged below the air inlet, the right side of the air inlet is fixedly provided with the spray chamber, a fixed plate is fixedly arranged between the air inlet and the spray chamber, the middle position of the fixed plate is fixedly provided with a filtering net, the top end of the inner side wall of the air inlet is fixedly provided with a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly connected with a baffle through a hydraulic rod, the right side of the baffle is fixedly provided with a cleaning brush, the cleaning brush is attached to the filtering net, the inner bottom end of the air inlet, a water tank is fixedly arranged above the spray chamber, a spray pipe is fixedly arranged in the spray chamber and is communicated with the water tank, a plurality of spray heads are uniformly arranged on the spray pipe at intervals, a filter plate is fixedly arranged below the spray heads, a cleaning device is fixedly arranged on one side of the filter plate, a water pump is fixedly arranged below the filter plate and is communicated with the water tank through a circulating water pipe, a drain outlet is arranged on the other side of the filter plate and is communicated with a waste residue box arranged below the dissolution chamber, a vent opening is fixedly arranged on the right side of the spray chamber, a gas collecting hood is fixedly arranged on the right side of the vent opening and is communicated with the bottom of the dissolution chamber through a gas pipe, a motor is fixedly arranged above the dissolution chamber, and the output end of the motor is fixedly connected with a stirring shaft arranged in the dissolution chamber, the stirring shaft is provided with a plurality of stirring blades at even intervals, the right side of the dissolving chamber is fixedly provided with a filtering chamber, the inside of the filtering chamber is fixedly provided with a desulfurization plate, one side of the desulfurization plate is fixedly provided with a denitration plate, and one side of the denitration plate is fixedly provided with an activated carbon odor removal plate.
Preferably, the front end of the impurity removing box is hinged with a cabinet door through a hinge.
Preferably, the cleaning device comprises an electric telescopic rod, a connecting rod and a cleaning block.
Preferably, the drain outlet is hinged with a plugging plate through a rotating shaft.
Preferably, the baffle is a square plate which is consistent with the maximum space inside the air inlet.
Preferably, the model of the motor is a Siemens V90 series servo motor.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses a set up baffle and cleaning brush in one side of filter screen, can clear up the filter screen, prevent filter screen blocking, when the baffle descends simultaneously, can be isolated with accumulational dust and particle impurity and air inlet, then the edulcoration incasement is sucked through the soil pick-up pump, need not shut down, can clear up the dust, purification treatment efficiency has been guaranteed, be provided with cleaning device in the spray room, can push away the waste residue incasement with the impurity that remains on the filter, further guarantee equipment normal operating, it rotates to drive the (mixing) shaft through the motor, make waste gas and solution contact more abundant, the dissolution efficiency has further been improved, waste gas after multichannel process is handled is through the desulfurization, the denitration is with remove the flavor and handle the back, discharge again, make the exhaust-gas treatment effect better.
Drawings
FIG. 1 is a schematic view of the overall structure of a boiler exhaust gas treatment device according to the present invention;
FIG. 2 is a schematic view of the interior of a boiler exhaust gas treatment device according to the present invention;
FIG. 3 is a schematic view of the working state of the boiler exhaust gas treatment device of the present invention;
in the figure: 1. a device main body; 2. an operation panel; 3. an air inlet; 4. an impurity removal box; 5. an air outlet; 6. a water tank; 7. supporting legs; 8. a fixing plate; 9. a shower head; 10. a spray chamber; 11. a dissolution chamber; 12. a filtering chamber; 13. a shower pipe; 14. a filter screen; 15. a sewage suction pump; 16. a hydraulic cylinder; 17. a hydraulic lever; 18. a baffle plate; 19. a cleaning brush; 20. a cleaning device; 21. a water pump; 22. a circulating water pipe; 24. a filter plate; 25. a sewage draining outlet; 26. a waste residue tank; 27. a vent; 28. a gas-collecting hood; 29. a gas delivery pipe; 30. a motor; 31. a stirring shaft; 32. stirring blades; 33. a desulfurization plate; 34. a denitration plate; 35. an active carbon deodorizing board.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
As shown in fig. 1-3, a boiler waste gas treatment device comprises a device body 1, an operation panel 2, an air inlet 3, an impurity removing box 4, an air outlet 5, a spray chamber 10, a dissolving chamber 11 and a filtering chamber 12, wherein the left end of the device body 1 is fixedly provided with the air inlet 3, the right end of the device body 1 is fixedly provided with the air outlet 5, the impurity removing box 4 is fixedly arranged below the air inlet 3, the right side of the air inlet 3 is fixedly provided with the spray chamber 10, a fixing plate 8 is fixedly arranged between the air inlet 3 and the spray chamber 10, a filtering net 14 is fixedly arranged in the middle of the fixing plate 8, a hydraulic cylinder 16 is fixedly arranged at the top end of the inner side wall of the air inlet 3, the output end of the hydraulic cylinder 16 is fixedly connected with a baffle 18 through a hydraulic rod 17, and a cleaning brush 19 is fixedly arranged at, the cleaning brush 19 is attached to a filter screen 14, a dirt suction pump 15 is fixedly arranged at the bottom end inside the air inlet 3, the dirt suction pump 15 is communicated with an impurity removal box 4, a water tank 6 is fixedly arranged above the spray chamber 10, a spray pipe 13 is fixedly arranged inside the spray chamber 10, the spray pipe 13 is communicated with the water tank 6, a plurality of spray heads 9 are uniformly arranged on the spray pipe 13 at intervals, a filter plate 24 is fixedly arranged below the spray heads 9, a cleaning device 20 is fixedly arranged on one side of the filter plate 24, a water pump 21 is fixedly arranged below the filter plate 24, the water pump 21 is communicated with the water tank 6 through a circulating water pipe 22, a drain 25 is arranged on the other side of the filter plate 24, the drain 25 is communicated with a waste residue box 26 arranged below the dissolution chamber 11, and an air vent 27 is fixedly arranged on the right side of the spray chamber 10, the fixed gas collecting channel 28 that is provided with in right side of blow vent 27, gas collecting channel 28 passes through gas-supply pipe 29 and dissolves the bottom intercommunication of room 11, dissolve the fixed motor 30 that sets up in top of room 11, the output of motor 30 and the (mixing) shaft 31 fixed connection who sets up in dissolving the indoor portion of 11, the even a plurality of stirring leaf 32 that is provided with in interval on the (mixing) shaft 31, the fixed filter chamber 12 that is provided with in right side of dissolving the room 11, the fixed doctor plate 33 that is provided with in inside of filter chamber 12, the fixed denitration plate 34 that is provided with in one side of doctor plate 33, the fixed activated carbon that is provided with in one side of denitration plate 34 removes flavor plate 35.
In this embodiment, preferably, the front end of the impurity removing box 4 is hinged to a cabinet door through a hinge.
In this embodiment, the cleaning device 20 preferably includes an electric telescopic rod, a connecting rod and a cleaning block.
In this embodiment, preferably, the drain outlet 25 is hinged with a plugging plate through a rotating shaft.
In this embodiment, the baffle 18 is preferably a square plate corresponding to the maximum space inside the air inlet 3.
In this embodiment, the model of the motor 30 is preferably a siemens V90 series servomotor.
It should be noted that, the utility model relates to a boiler waste gas treatment device, when using this kind of boiler waste gas treatment device, at first, the air inlet 3 is communicated with the boiler chimney through the pipeline, when the waste gas enters into the device main body 1, the filter screen 14 intercepts the dust and the impurity in the waste gas at one side of the filter screen 14, after using for a period of time, the dust and the impurity are accumulated at one side of the filter screen 14, the control hydraulic cylinder 16 is operated, make the baffle 18 descend, utilize the cleaning brush 19 at one side of the baffle 18 to clean the filter screen 14, when the baffle 18 descends to the bottom, the accumulated dust and particle impurity can be isolated from the air inlet 3, then the dust is sucked into the impurity removing box 4 through the dirt suction pump 15, without stopping the machine, the dust can be cleaned, the purification treatment efficiency is guaranteed, the treated waste gas enters into the spray chamber 10, the spray head 9 primarily sprays water to wash the waste gas, in order to further reduce the temperature and the impurity of waste gas, cleaning device 20 can push away waste residue case 26 with the impurity that remains on filter 24 in, guarantee equipment normal operating, water after the filtration passes through water pump 21 and circulating pipe 22 and flows back to in water tank 6, the recycling of water resource has been realized, waste gas after dust fall cooling treatment passes through gas collecting channel 28 and gas-supply pipe 29 and gets into dissolving room 11 in, carry out harmful gas's dissolution, it rotates to drive (mixing) shaft 31 through motor 30, it is more abundant with dissolving the liquid contact to make waste gas, further dissolution efficiency has been improved, gas after the dissolution is through the desulfurization, the denitration is with remove the flavor processing back, in 5 emission atmosphere of rethread gas outlet, be favorable to the environmental protection.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a boiler waste gas treatment device, includes device main part (1), operating panel (2), air inlet (3), edulcoration case (4), gas outlet (5), spray room (10), dissolving chamber (11) and filter chamber (12), its characterized in that: the device is characterized in that an air inlet (3) is fixedly arranged at the end part of the left side of the device main body (1), an air outlet (5) is fixedly arranged at the end part of the right side of the device main body (1), an impurity removing box (4) is fixedly arranged below the air inlet (3), a spray chamber (10) is fixedly arranged at the right side of the air inlet (3), a fixing plate (8) is fixedly arranged between the air inlet (3) and the spray chamber (10), a filter screen (14) is fixedly arranged at the middle position of the fixing plate (8), a hydraulic cylinder (16) is fixedly arranged at the top end of the inner side wall of the air inlet (3), the output end of the hydraulic cylinder (16) is fixedly connected with a baffle (18) through a hydraulic rod (17), a cleaning brush (19) is fixedly arranged at the right side of the baffle (18), the cleaning brush (19) is attached to the filter screen (14), and a dirt sucking, the sewage suction pump (15) is communicated with the impurity removal box (4), a water tank (6) is fixedly arranged above the spray chamber (10), a spray pipe (13) is fixedly arranged inside the spray chamber (10), the spray pipe (13) is communicated with the water tank (6), a plurality of spray heads (9) are uniformly arranged on the spray pipe (13) at intervals, a filter plate (24) is fixedly arranged below the spray heads (9), a cleaning device (20) is fixedly arranged on one side of the filter plate (24), a water pump (21) is fixedly arranged below the filter plate (24), the water pump (21) is communicated with the water tank (6) through a circulating pipe (22), a sewage discharge port (25) is arranged on the other side of the filter plate (24), the sewage discharge port (25) is communicated with a waste residue box (26) arranged below the dissolution chamber (11), and an air vent (27) is fixedly arranged on the right side of the spray chamber (10), the fixed gas collecting channel (28) that is provided with in right side of blow vent (27), gas collecting channel (28) are through gas-supply pipe (29) and the bottom intercommunication of dissolving room (11), the fixed motor (30) that sets up in top of dissolving room (11), the output and the (mixing) shaft (31) fixed connection of setting in dissolving room (11) inside of motor (30), the even a plurality of stirring leaf (32) that is provided with in interval on (mixing) shaft (31), the fixed filter chamber (12) that is provided with in right side of dissolving room (11), the fixed doctor plate (33) that is provided with in inside of filter chamber (12), the fixed denitration plate (34) that is provided with in one side of doctor plate (33), the fixed activated carbon that is provided with in one side of denitration plate (34) removes flavor plate (35).
2. The boiler exhaust gas treatment device according to claim 1, characterized in that: the front end of the impurity removing box (4) is hinged with a cabinet door through a hinge.
3. The boiler exhaust gas treatment device according to claim 1, characterized in that: the cleaning device (20) comprises an electric telescopic rod, a connecting rod and a cleaning block.
4. The boiler exhaust gas treatment device according to claim 1, characterized in that: and a plugging plate is hinged on the sewage outlet (25) through a rotating shaft.
5. The boiler exhaust gas treatment device according to claim 1, characterized in that: the baffle (18) is a square plate which is consistent with the maximum space inside the air inlet (3).
6. The boiler exhaust gas treatment device according to claim 1, characterized in that: the type of the motor (30) is Siemens V90 series servo motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412371.9U CN210186720U (en) | 2019-03-29 | 2019-03-29 | Boiler waste gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920412371.9U CN210186720U (en) | 2019-03-29 | 2019-03-29 | Boiler waste gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210186720U true CN210186720U (en) | 2020-03-27 |
Family
ID=69877590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920412371.9U Expired - Fee Related CN210186720U (en) | 2019-03-29 | 2019-03-29 | Boiler waste gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210186720U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111298582A (en) * | 2020-03-30 | 2020-06-19 | 黑龙江赫尔特生物质能源发展有限公司 | Method and device for purifying dust-containing flue gas by using biomass |
| CN111544996A (en) * | 2020-05-14 | 2020-08-18 | 苏州赛博纺织有限公司 | Weaving is with weaving quick-witted weaving dirt environmental protection collection mechanism |
| CN112044252A (en) * | 2020-08-15 | 2020-12-08 | 王建平 | High-efficient type burning exhaust gas detects and processing apparatus |
| CN112275066A (en) * | 2020-09-29 | 2021-01-29 | 安徽华铂再生资源科技有限公司 | A dust removal unit for plastics modification production line |
| CN113289483A (en) * | 2021-06-28 | 2021-08-24 | 安徽慧枫再生资源科技有限公司 | Secondary aluminum melting combustion smoke exhaust system and working method thereof |
| CN116889783A (en) * | 2023-09-11 | 2023-10-17 | 浙江华南环保装备股份有限公司 | Desulfurization, denitrification and dust removal device |
| CN119158362A (en) * | 2024-11-05 | 2024-12-20 | 郯城县大山新型建材有限公司 | A waste gas treatment device for brick and tile calcining line |
| CN119971656A (en) * | 2025-03-13 | 2025-05-13 | 百仑生物科技(江苏)有限公司 | A fermentation tank tail gas purification device that is easy to clean |
-
2019
- 2019-03-29 CN CN201920412371.9U patent/CN210186720U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111298582A (en) * | 2020-03-30 | 2020-06-19 | 黑龙江赫尔特生物质能源发展有限公司 | Method and device for purifying dust-containing flue gas by using biomass |
| CN111544996A (en) * | 2020-05-14 | 2020-08-18 | 苏州赛博纺织有限公司 | Weaving is with weaving quick-witted weaving dirt environmental protection collection mechanism |
| CN112044252A (en) * | 2020-08-15 | 2020-12-08 | 王建平 | High-efficient type burning exhaust gas detects and processing apparatus |
| CN112275066A (en) * | 2020-09-29 | 2021-01-29 | 安徽华铂再生资源科技有限公司 | A dust removal unit for plastics modification production line |
| CN113289483A (en) * | 2021-06-28 | 2021-08-24 | 安徽慧枫再生资源科技有限公司 | Secondary aluminum melting combustion smoke exhaust system and working method thereof |
| CN116889783A (en) * | 2023-09-11 | 2023-10-17 | 浙江华南环保装备股份有限公司 | Desulfurization, denitrification and dust removal device |
| CN116889783B (en) * | 2023-09-11 | 2023-12-19 | 浙江华南环保装备股份有限公司 | Desulfurization, denitrification and dust removal device |
| CN119158362A (en) * | 2024-11-05 | 2024-12-20 | 郯城县大山新型建材有限公司 | A waste gas treatment device for brick and tile calcining line |
| CN119158362B (en) * | 2024-11-05 | 2025-03-14 | 郯城县大山新型建材有限公司 | A waste gas treatment device for brick and tile calcining line |
| CN119971656A (en) * | 2025-03-13 | 2025-05-13 | 百仑生物科技(江苏)有限公司 | A fermentation tank tail gas purification device that is easy to clean |
| CN119971656B (en) * | 2025-03-13 | 2025-07-25 | 百仑生物科技(江苏)有限公司 | A fermentation tank tail gas purification device that is easy to clean |
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Granted publication date: 20200327 |
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| CF01 | Termination of patent right due to non-payment of annual fee |