CN110397932B - Double-layer furnace body incineration device with rotatable opening type liner - Google Patents
Double-layer furnace body incineration device with rotatable opening type liner Download PDFInfo
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- CN110397932B CN110397932B CN201910679461.9A CN201910679461A CN110397932B CN 110397932 B CN110397932 B CN 110397932B CN 201910679461 A CN201910679461 A CN 201910679461A CN 110397932 B CN110397932 B CN 110397932B
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- furnace body
- inner container
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- rectangular
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- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 21
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 239000002893 slag Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 230000033228 biological regulation Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 15
- 238000009423 ventilation Methods 0.000 abstract description 9
- 238000003756 stirring Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 7
- 239000002341 toxic gas Substances 0.000 abstract description 5
- 239000002912 waste gas Substances 0.000 abstract description 3
- 238000005422 blasting Methods 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004056 waste incineration Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/38—Multi-hearth arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2203/00—Furnace arrangements
- F23G2203/20—Rotary drum furnace
- F23G2203/208—Rotary drum furnace with interior agitating members
Abstract
The invention relates to a double-layer furnace body incineration device with a rotatable opening type inner container, which comprises a double-layer furnace body structure, a rotary driving mechanism, an air blowing mechanism, an exhaust mechanism and a fixed support, wherein the double-layer furnace body structure comprises a rotatable horizontal cylindrical shell inner container and a cylindrical shell with an elliptical cross section, the inner container is arranged to be open and is convenient for discharging, a spiral boss arranged on the inner wall of the inner container can realize stirring and ventilation functions, so that waste gas and fresh air are favorably isolated in time, objects to be combusted are timely separated from waste residues, the discharge capacity of toxic gases generated due to insufficient combustion is reduced, and meanwhile, the material combustion efficiency is improved.
Description
Technical Field
The invention relates to the technical field of incineration treatment equipment, in particular to a double-layer furnace body incineration device with a rotatable opening type liner, which is suitable for household garbage incineration treatment, industrial waste incineration treatment, fuel combustion heating and the like.
Background
Harmless incineration treatment of household garbage and industrial waste, improvement of incineration efficiency, means of recycling combustion heat and the like are research hot spots in the technical field of environmental protection.
As is known, when the combustion of the material is insufficient, on the one hand, the combustion efficiency of the material is greatly reduced; on the other hand, toxic gases such as carbon monoxide are easily generated due to insufficient oxygen supply. The existing incineration device has the problem of insufficient combustion generally, and the analysis and induction reasons mainly comprise: firstly, the whole oxygen supply amount in the incinerator is insufficient. The flow rate of the air introduced into the furnace is smaller; secondly, the oxygen in the incinerator is unevenly distributed. The arrangement of the blast channels of most incineration devices is uneven, so that the oxygen in the furnace is unevenly distributed; third, accurate feeding is not realized. When the materials are burnt, the oxygen consumption of the incinerator is different due to the different burning degrees of the materials at different positions; fourth, ash covers the objects to be burned to prevent contact with oxygen.
Chinese patent (201721318938.3) discloses a waste incineration mechanism of an industrial waste rotary vertical incinerator. The air inlet is single and above the flame, and oxygen supply according to the combustion degree can not be realized. The burning cylinder and the helical blade are matched to rotate to stir and turn materials, but the stirring amplitude is relatively large, the materials are easy to cover flame at the initial ignition stage to cause ignition failure, meanwhile, ash is not separated from the materials, and can be mixed in the materials when stirring and turning, contact between the materials and air can be blocked, and the burning is insufficient. Chinese patent (201310699342.2) and Chinese patent (201410466211.4) respectively disclose a rotary double-roller incinerator and a rotary vertical garbage incinerator, and the arrangement of the designed incinerator cylinder/incinerator does not realize the separation of ash and objects to be combusted, and still has the problem of insufficient combustion.
Aiming at the problems, the invention provides the following solution thought: on one hand, oxygen is supplied according to different combustion degrees and oxygen is supplied accurately according to the needs; on the other hand, ash and the objects to be burnt are separated in time. . The inner container is arranged to be open-type, so that the discharging is facilitated. And the spiral boss arranged on the inner wall of the liner can realize stirring and ventilation functions, so that waste gas and fresh air are timely isolated, objects to be combusted and waste residues are timely separated, the discharge capacity of toxic gases generated due to insufficient combustion is reduced, and meanwhile, the material combustion efficiency is improved.
Disclosure of Invention
The invention aims to solve the technical problems that: the double-layer furnace body incineration device with the rotatable opening type inner container is beneficial to timely isolation of waste gas and fresh air and timely separation of objects to be combusted and waste residues, reduces the emission of toxic gases caused by insufficient combustion, and improves the material combustion efficiency.
The technical scheme adopted for solving the technical problems is as follows: the double-layer furnace body incineration device with rotatable opening type inner container comprises a furnace body, a fixed bracket for fixedly supporting the furnace body, a ventilation mechanism and an exhaust mechanism which are arranged on the furnace body, and a rotary driving mechanism for driving the furnace body to rotate, wherein the furnace body comprises an outer furnace body and an inner container arranged in the outer furnace body, the inner container is a horizontal cylindrical shell, two ends of the inner container are respectively and coaxially connected with a feed channel and a power shaft, the other end of the power shaft is connected with the rotary driving mechanism, the outer furnace body is a cylindrical shell with an elliptical section, two ends of the outer furnace body are respectively connected with the feed channel and the outer wall of the power shaft through bearings, a feed channel port is provided with a feed cabin door, the bottom of the outer furnace body is provided with a discharge cabin door, the fixed bracket supports the outer furnace body and is fixed with the ground, the ventilation mechanism comprises air blasting channels uniformly distributed at the bottom of the side face of the outer furnace body and an air blasting mechanism connected with the air blasting channels, the exhaust mechanism comprises an exhaust port and an exhaust pipeline which are arranged at the top of the outer furnace body, the top of the inner container is provided with a through-long slag discharging channel, the corresponding circumferential angle alpha of the slag discharging channel is 5-180 degrees, the inner wall of the inner container is axially and symmetrically provided with a spiral boss and a rectangular through hole at two sides of the slag discharging channel, the rectangular through holes and the spiral boss are arranged at intervals, the number of the combination of the rectangular through holes and the spiral boss is n, n is 2-50, the rectangular through hole is not formed in the part, which directly corresponds to the slag discharging channel, of the inner container penetrating through the air vent, the rectangular through holes at two sides of the slag discharging channel are provided with metal meshes, the spiral boss can be of a spiral, double-spiral or multi-spiral structure, and the section of the spiral boss can be triangular, semicircular, trapezoid and other combination shapes.
Further, the outer furnace body forms an inclined angle of 5-20 degrees with the ground.
Further, the distance between the outer wall of the inner container and the inner wall of the outer furnace body in the short axis direction of the elliptic section of the outer furnace body is 5-30 mm, and the distance between the two ends of the inner container and the inner wall of the two ends of the outer furnace body is 5-30 mm.
Further, the blast channels are uniformly distributed at the bottoms of two sides of the outer furnace body, the extension lines of the blast channels point to the axis of the inner container, the part of the blast channels in the inner container is a tubular boss, and a metal filter screen is arranged at the opening of the tubular boss to avoid the blockage of the channels by waste residues.
Further, the ratio of the major axis to the minor axis of the elliptic section of the outer furnace body is 1.4-8.
Further, the spiral angle of the spiral boss is-150 degrees, and the spiral angle values of the adjacent two spiral bosses are opposite, so that left and right stirring and turning are realized during rotation.
Further, the area of the metal mesh holes is 5-10000 mm 2 。
Further, the diameter of the through vent hole formed in the spiral boss is 5-100 mm, the part of the inner wall of the liner, which is not provided with the rectangular through hole, is provided with the through hole, and the diameter of the through hole is 5-50 mm.
Further, the number n of the combination of the spiral bosses and the rectangular through holes is 4, the total number of the spiral bosses is 6 which are uniformly distributed on the circumference, and the rectangular through holes are respectively distributed on 2 sides of the slag discharging channel.
Further, the rotary driving mechanism is a driving mechanism with a speed regulating function, the inner container can stably run at a rotating speed of 0.2-50 r/min and can be divided into three gears of low speed, medium speed and high speed, the air blowing mechanism 4 is an air blowing mechanism with a gas flow speed regulating function, and the adjustable range of the air blowing mechanism is 500-100000 m 3 And/h, the speed regulating function can be divided into a low speed, a medium speed and a high speed.
The double-layer furnace body incineration device with the rotatable opening type liner has the beneficial effects that:
1. the interior of the furnace body is divided into three spaces, namely a slag storage cavity, a combustion cavity and an exhaust gas cavity, which is favorable for timely isolating exhaust gas from fresh air and timely separating objects to be combusted from waste slag;
2. the spiral boss is arranged in the inner container, so that the materials can be stirred up, down, left and right during rotation, and waste residues and objects to be combusted can be separated in time;
3. the spiral boss on the liner is provided with a through hole, and is inserted into the material to be combusted for ventilation, so that the problem that the gas is difficult to permeate thick-layer material to be combusted to cause insufficient combustion to generate toxic gas is solved;
4. the parts of the side surface of the inner container, on which the rectangular metal net is arranged, are alternately distributed with the parts on which the spiral bosses are arranged, and the spiral lift angle values of the spiral bosses at two adjacent parts are opposite, so that left and right stirring and turning are realized during rotation, the timely separation of the objects to be combusted from waste residues is facilitated, and meanwhile, the accumulation of the objects to be combusted on one side is avoided;
5. the inner container is arranged to be open-type, so that the discharging is facilitated.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is an overall schematic of the present invention;
FIG. 2 is a longitudinal cross-sectional view of the present invention;
FIG. 3 is a schematic view of the overall structure of the liner;
FIG. 4 is a transverse cross-sectional view of the liner;
FIG. 5 is a schematic view showing the development of the side inner wall of the liner;
in the figure: 1. furnace body, 2, exhaust mechanism, 3, rotary driving mechanism, 4, blast mechanism, 5, fixed support, 6, feed hatch, 7, feed channel, 8, rectangular through hole, 9, slag discharging channel, 10, metal net, 11, through hole, 12, spiral boss, 13, exhaust pipe, 14, exhaust port, 15, through hole, 16, power shaft, 17, outer furnace body, 18, inner container, 19, blast channel, 20.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
The double-layer furnace body incineration device with rotatable opening type inner container as shown in figures 1-5 comprises a furnace body 1, a fixed support 5 for fixedly supporting the furnace body 1, a ventilation mechanism and an exhaust mechanism 2 which are arranged on the furnace body 1, and a rotary driving mechanism 3 for driving the furnace body 1 to rotate, wherein the furnace body 1 comprises an outer furnace body 17 and an inner container 18 which is arranged in the outer furnace body 17, the inner container 18 is a horizontal cylindrical shell, two ends of the inner container are respectively and coaxially connected with a feeding channel 7 and a power shaft 16, the other end of the power shaft 16 is connected with the rotary driving mechanism 3, the outer furnace body 17 and the ground form an inclined angle of 5-20 degrees, and the inner container is a cylindrical shell with an elliptic section and an elliptic sectionThe ratio of the long axis to the short axis is 1.4-8, two ends of the long axis and the short axis are respectively connected with the feed channel 7 and the outer wall of the power shaft 16 through bearings, the port of the feed channel 7 is provided with a feed cabin door 6, the bottom of the outer furnace body 17 is provided with a discharge cabin door 20, the distance between the outer wall of the inner container 18 and the inner wall of the elliptical section of the outer furnace body 17 in the short axis direction is 5-30 mm, the distance between the two ends of the inner container 18 and the inner wall of the two ends of the outer furnace body 17 is 5-30 mm, the fixed bracket 5 supports the outer furnace body 17 and is fixed with the ground, the ventilation mechanism comprises air blasting channels 19 uniformly distributed at the bottom of the side surface of the outer furnace body 17 and air blasting mechanisms 4 connected with the air blasting channels 19, the air blasting channels 19 are uniformly distributed at the bottom of the two sides of the outer furnace body 17, the extension lines of the air blasting channels 19 are directed to the axis of the inner container 18, the part of the air blasting channels 19 in the inner container 18 is a tubular boss, and the metal filter screen is arranged at the port of the tubular boss, the exhaust mechanism 2 comprises an exhaust port 14 and an exhaust pipeline 13 which are arranged at the top of an outer furnace body 17, the top of an inner container 18 is provided with a slag discharging channel 9 with a through length, the circumferential angle alpha corresponding to the slag discharging channel 9 is 5-180 degrees, the inner wall of the inner container 18 is axially and symmetrically provided with a spiral boss 12 and a rectangular through hole 8 at two sides of the slag discharging channel 9, the rectangular through hole 8 and the spiral boss 12 are arranged at intervals, the combined number of the two is n and 4, the total number of the spiral bosses 12 is 6, the number of the rectangular through holes 8 is 4, the spiral angle of the spiral bosses 12 is-150 degrees, the spiral angle values of the adjacent two spiral bosses 12 are opposite, the left and right stirring is realized during rotation, through ventilation holes 11 are formed in the spiral bosses 12, the diameter of the through ventilation holes 11 is 5-100 mm, the part of the inner container 18, which directly corresponds to the slag discharging channel 9, is not provided with the rectangular through holes, the part not provided with the rectangular through holes is provided with the through holes 15 with the diameter of 5-50 mm, the rectangular through holes 8 are provided with the metal net 10, and the area of the grid holes of the metal net 10 is 5-10000 mm 2 。
The rotary driving mechanism 3 selects a driving mechanism with a speed regulation function, can ensure that the liner stably runs at a rotating speed of 0.2-50 r/min and can be divided into three gears of low speed, medium speed and high speed; the air blowing mechanism 4 is selected from air blowing mechanisms with the function of adjusting the air flow velocity, and the adjustable range of the air blowing mechanisms is 500-100000 m 3 And/h, the speed regulating function can be divided into a low speed, a medium speed and a high speed.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. A double-deck furnace body incineration device with rotatable open-type inner bag, characterized by: the furnace body (1) comprises an outer furnace body (17) and an inner container (18) arranged in the outer furnace body (17), wherein the inner container (18) is a horizontal cylindrical shell, two ends of the inner container are respectively and coaxially connected with a feeding channel (7) and a power shaft (16), the other end of the power shaft (16) is connected with the rotary driving mechanism (3), the outer furnace body (17) is a cylindrical shell with an elliptical section, two ends of the outer furnace body (17) are respectively connected with the outer walls of the feeding channel (7) and the power shaft (16) through bearings, a feeding cabin door (6) is arranged at a port of the feeding channel (7), a discharging cabin door (20) is arranged at the bottom of the outer furnace body (17), the fixed support (5) supports the outer furnace body (17) and is fixed with the ground, the outer furnace body (17) is inclined at an angle of 5-20 DEG with the ground, the outer furnace body (17) comprises a cylindrical shell with an elliptical section, two ends of the outer furnace body (17) are respectively connected with the outer wall of the feeding channel (7) and the outer wall of the power shaft (16), the two ends of the outer furnace body (7) are respectively connected with the outer wall of the feeding cabin door (6) through bearings, the feeding cabin door (19) is arranged at the port of the feeding cabin door, the exhaust port (7) is arranged at the exhaust port of the exhaust port (19), the exhaust port (13) is connected with the exhaust port (14) and the exhaust port (13) of the exhaust port (14), the top of the inner container (18) is provided with a through-length slag discharging channel (9), the circumferential angle alpha corresponding to the slag discharging channel (9) is 5-180 degrees, the inner wall of the inner container (18) is axially and symmetrically provided with a spiral boss (12) and a rectangular through hole (8) at two sides of the slag discharging channel (9), the rectangular through hole (8) and the spiral boss (12) are arranged at intervals, the number of the combination of the rectangular through hole (8) and the spiral boss (12) is n, the number of the combination of the rectangular through hole and the spiral boss is 2-50, the spiral angle of the spiral boss (12) is-150 degrees, the spiral angle values of two adjacent spiral bosses (12) are opposite, and the spiral bosses are(12) The inner wall of the inner container (18) is provided with a through hole (11), the diameter of the through hole (11) is 5-100 mm, the part which is not provided with a rectangular through hole is provided with a through hole (15), the diameter is 5-50 mm, the part which is directly corresponding to the slag discharging channel (9) in the inner container (18) is not provided with a rectangular through hole, the rectangular through holes (8) on the two sides of the slag discharging channel (9) are provided with metal nets (10), and the area of the grid holes of the metal nets (10) is 5-10000 mm 2 。
2. The double-deck furnace body incineration device with rotatable open-type inner container according to claim 1, characterized in that: the distance between the outer wall of the inner container (18) and the inner wall of the elliptical cross section of the outer furnace body (17) in the short axis direction is 5-30 mm, and the distance between the two ends of the inner container (18) and the inner walls of the two ends of the outer furnace body (17) is 5-30 mm.
3. The double-deck furnace body incineration device with rotatable open-type inner container according to claim 1, characterized in that: the air blowing channels (19) are uniformly distributed at the bottoms of two sides of the outer furnace body (17), the extension lines of the air blowing channels (19) point to the axis of the inner container (18), the part of the air blowing channels (19) located in the inner container (18) is a tubular boss, and a metal filter screen is arranged at the opening of the tubular boss.
4. The double-deck furnace body incineration device with rotatable open-type inner container according to claim 1, characterized in that: the ratio of the major axis to the minor axis of the elliptic section of the outer furnace body (17) is 1.4-8.
5. The double-deck furnace body incineration device with rotatable open-type inner container according to claim 1, characterized in that: the combined number n of the spiral bosses (12) and the rectangular through holes (8) is 4, the total number of the spiral bosses (12) is 6 which are uniformly distributed on the circumference, and the rectangular through holes (8) are respectively 2 on two sides of the slag discharging channel (9).
6. The double-deck furnace body incineration device with rotatable open-type inner container according to claim 1, characterized in that: the rotary driving mechanism (3) and the air blowing mechanism (4) are mechanisms with three-gear speed regulation functions of low speed, medium speed and high speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679461.9A CN110397932B (en) | 2019-07-26 | 2019-07-26 | Double-layer furnace body incineration device with rotatable opening type liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910679461.9A CN110397932B (en) | 2019-07-26 | 2019-07-26 | Double-layer furnace body incineration device with rotatable opening type liner |
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| Publication Number | Publication Date |
|---|---|
| CN110397932A CN110397932A (en) | 2019-11-01 |
| CN110397932B true CN110397932B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910679461.9A Active CN110397932B (en) | 2019-07-26 | 2019-07-26 | Double-layer furnace body incineration device with rotatable opening type liner |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1372965A (en) * | 1972-01-26 | 1974-11-06 | Agrimonti C | Method and apparatus for waste disposal |
| CN202118920U (en) * | 2011-06-14 | 2012-01-18 | 刘谦 | Stirrer of garbage cracking furnace |
| CN206018654U (en) * | 2016-06-30 | 2017-03-15 | 安徽未名鼎和环保有限公司 | A kind of thoroughly Disposal System of Mud Burning that burns |
| CN109654510A (en) * | 2018-12-22 | 2019-04-19 | 李利 | A kind of environment protection garbage incineration device |
-
2019
- 2019-07-26 CN CN201910679461.9A patent/CN110397932B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1372965A (en) * | 1972-01-26 | 1974-11-06 | Agrimonti C | Method and apparatus for waste disposal |
| CN202118920U (en) * | 2011-06-14 | 2012-01-18 | 刘谦 | Stirrer of garbage cracking furnace |
| CN206018654U (en) * | 2016-06-30 | 2017-03-15 | 安徽未名鼎和环保有限公司 | A kind of thoroughly Disposal System of Mud Burning that burns |
| CN109654510A (en) * | 2018-12-22 | 2019-04-19 | 李利 | A kind of environment protection garbage incineration device |
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| Publication number | Publication date |
|---|---|
| CN110397932A (en) | 2019-11-01 |
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