A light removal distillation tower

Abstract

The present invention relates to the field of distillation towers, and specifically to a light removal distillation tower, comprising a feed pipe, a main body, a heating mechanism, a driving mechanism, an exchange mechanism, a stirring mechanism and a connecting mechanism; when the gaps between the fillers inside the exchange mechanism are blocked by impurities, the driving mechanism is turned on, so that the driving mechanism drives the stirring mechanism to continuously rotate inside the exchange mechanism, so that the stirring mechanism drives the fillers to move, changing the gaps between the fillers, and the movement of the fillers grinds the impurities so that the impurities are discharged from the inside of the fillers, and at the same time the driving mechanism drives the connecting mechanism to move, and the connecting mechanism drives the top of the exchange mechanism to continuously move up and down and rotate inside the main body, continuously changing the internal height of the exchange mechanism, and when the internal height of the exchange mechanism increases, the movement space of the fillers increases, which facilitates the movement of the fillers inside the exchange mechanism, and when the exchange mechanism rotates downward, the exchange mechanism flattens the moving fillers inside the exchange mechanism, so that the fillers are evenly distributed inside the exchange mechanism.

Description

Technical Field

[0001] The present invention relates to the field of distillation towers, in particular to a light removal distillation tower. Background Art

[0002] A light-gas removal distillation tower is a mass transfer device that uses the packing within the tower as the contact element between the gas and liquid phases. The tower is a vertical cylinder with a packing support plate at the bottom. The packing is placed on the support plate in a random pile or in a stacked arrangement. A packing pressure plate is installed above the packing to prevent it from being blown by the rising airflow.

[0003] When people use a light oil removal distillation tower to process petroleum, the alumina filler balls used as fillers inside the distillation tower will, after a period of use, cause the impurities contained in the petroleum to block the gaps between the filler balls, resulting in reduced gas-liquid exchange efficiency and causing liquid to accumulate above the filler, causing the tower to flood. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a light fractionation distillation tower.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a light degassing distillation tower, including a feed pipe, a main body, a heating mechanism, a driving mechanism, an exchange mechanism, a stirring mechanism and a connecting mechanism, the side wall of the main body is symmetrically installed with the feed pipe for adding raw materials into the main body, and the bottom end of the main body is installed with the heating mechanism for heating the raw materials to evaporate the raw materials; the exchange mechanism for gas-liquid exchange is installed inside the main body, the interior of the exchange mechanism is rotatably connected to the stirring mechanism for removing impurities inside the filler, and the stirring mechanism is connected to the driving mechanism for driving the stirring mechanism to rotate; the side wall of the driving mechanism is rotatably connected to the connecting mechanism for driving the exchange mechanism to move up and down, and the connecting mechanism is connected to the side wall of the exchange mechanism.

[0006] Preferably, the exchange mechanism includes a first filter screen, filler balls and a second filter screen, the first filter screen is installed equidistantly inside the main body, the second filter screen is slidably connected inside the main body, a plurality of filler balls are placed equidistantly between the first filter screen and the second filter screen, and the diameters of the first filter screen and the second filter screen are equal to the maximum inner diameter of the main body.

[0007] Preferably, the heating mechanism includes a heating tube and a heating coil, the heating tube is vertically mounted at the bottom end of the main body, and the spiral heating coil is mounted inside the heating tube.

[0008] Preferably, the driving mechanism includes a motor, a first gear, a second gear and a rotating shaft. The motor is installed at the top of the main body, one end of the motor is fixedly connected to the second gear, the second gear is vertically engaged with the first gear, the bottom end of the first gear is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected to the inside of the first filter and the second filter, and the first gear and the second gear are rotatably connected to the inside of the top of the main body.

[0009] Preferably, the stirring mechanism includes a scraping plate, a connecting rod, a nozzle, a fixed ball and a support rod. The scraping plate with an arc-shaped side wall is equidistantly installed on the bottom surface of the second filter screen, and the scraping plate is slidably connected to the filler ball; the support rod is evenly installed on the bottom surface of the second filter screen, and the hollow fixed ball is installed on the bottom end of the support rod, and the nozzle inclined downward is equidistantly installed on the side wall of the fixed ball; the connecting rod with funnel-shaped interior at both ends is installed on the bottom end of the fixed ball, and the connecting rod, the fixed ball, the nozzle and the support rod are slidably connected to the side wall of the filler ball.

[0010] Preferably, the shortest distance between the bottom surface of the connecting rod and the top surface of the first filter screen is smaller than the diameter of the filler ball, and the inner diameter of the connecting rod is smaller than the inner diameter of the filler ball.

[0011] Preferably, the connecting mechanism includes a connecting sleeve, a slot, a limiting rod, a sliding rod and a support plate. The connecting sleeve is equidistantly installed inside the main body, and the inner part of the connecting sleeve is inclinedly provided with an annular slot. The inner sliding connection of the slot is the limiting rod with a spherical end, and the bottom end of the limiting rod with an "L"-shaped side wall is fixedly connected to the center of the top surface of the second filter screen; the support plate is installed in the center of the bottom surface of the second filter screen, and the sliding rod with a "T"-shaped cross-section is installed inside the support plate, and the sliding rod is fixedly connected to the side wall of the rotating shaft, and the height of the support plate is greater than the vertical distance between the top end of the slot and the bottom end of the slot.

[0012] Beneficial effects of the present invention:

[0013] (1) In the light-removal distillation tower described in the present invention, when the gaps between the fillers inside the exchange mechanism are blocked by impurities, affecting the efficiency of gas-liquid exchange, the driving mechanism is turned on, so that the driving mechanism drives the stirring mechanism to rotate continuously inside the exchange mechanism, so that the stirring mechanism drives the fillers to move, changing the gaps between the fillers, and the movement of the fillers grinds the impurities, so that the impurities are discharged from the inside of the fillers. At the same time, the driving mechanism drives the connecting mechanism to move, and the connecting mechanism drives the top of the exchange mechanism to move up and down continuously and rotate inside the main body, constantly changing the internal height of the exchange mechanism. When the internal height of the exchange mechanism increases, the movement space of the fillers increases, which facilitates the movement of the fillers inside the exchange mechanism. When the exchange mechanism rotates downward, the exchange mechanism flattens the moving fillers inside the exchange mechanism, so that the fillers are evenly distributed inside the exchange mechanism, which is convenient for next use.

[0014] (2) In the light-gas removal distillation tower described in the present invention, when people use it, the steam moves upward into the interior of the exchange mechanism to contact the liquid for gas-liquid exchange. At the same time, the stirring mechanism extends into the interior of the packing and is located below the packing. The steam enters the interior of the stirring mechanism and is evenly dispersed upward into the packing, which facilitates the upward movement of the steam in the packing, increases the contact area between the steam and the liquid, and accelerates the exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and examples.

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of a light removal distillation tower provided by the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the internal structure of the cylinder shown;

[0018] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at point A is shown;

[0019] Figure 4 for Figure 2 The schematic diagram of the exploded structure of the rotating shaft and the first filter shown;

[0020] Figure 5 for Figure 4 A top view of the support plate structure shown;

[0021] Figure 6 for Figure 3 A bottom view of the second filter structure shown;

[0022] Figure 7 for Figure 3 Schematic diagram of the internal structure of the stirring mechanism shown.

[0023] In the figure: 1. Feed pipe, 2. Main body, 3. Heating mechanism, 31. Heating cylinder, 32. Heating coil, 4. Driving mechanism, 41. Battery, 42. First gear, 43. Second gear, 44. Rotating shaft, 5. Exchange mechanism, 51. First filter screen, 52. Filling ball, 53. Second filter screen, 6. Stirring mechanism, 61. Scraping plate, 62. Connecting rod, 63. Spray nozzle, 64. Fixed ball, 65. Support rod, 7. Connecting mechanism, 71. Connecting sleeve, 72. Slot, 73. Limit rod, 74. Slide rod, 75. Support plate. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figure 1-Figure 7 As shown, a light removal distillation tower described in the present invention includes a feed pipe 1, a main body 2, a heating mechanism 3, a driving mechanism 4, an exchange mechanism 5, a stirring mechanism 6 and a connecting mechanism 7. The side wall of the main body 2 is symmetrically installed with the feed pipe 1 for adding raw materials into the main body 2, and the bottom end of the main body 2 is installed with the heating mechanism 3 for heating the raw materials to evaporate the raw materials; the exchange mechanism 5 for gas-liquid exchange is installed inside the main body 2, and the interior of the exchange mechanism 5 is rotatably connected to the stirring mechanism 6 for removing impurities inside the filler, and the stirring mechanism 6 is connected to the driving mechanism 4 for driving the stirring mechanism 6 to rotate; the side wall of the driving mechanism 4 is rotatably connected to the connecting mechanism 7 for driving the exchange mechanism 5 to move up and down, and the connecting mechanism 7 is connected to the side wall of the exchange mechanism 5.

[0026] Specifically, the exchange mechanism 5 includes a first filter screen 51, filler balls 52 and a second filter screen 53. The first filter screen 51 is installed equidistantly inside the main body 2, and the second filter screen 53 is slidably connected to the inside of the main body 2. A plurality of filler balls 52 are placed equidistantly between the first filter screen 51 and the second filter screen 53, and the diameters of the first filter screen 51 and the second filter screen 53 are equal to the maximum inner diameter of the main body 2. The diameters of the filter holes of the first filter screen 51 and the second filter screen 53 are smaller than the diameters of the filler balls 52, so that the first filter screen 51 provides support for the filler balls 52 and fixes the filler balls 52 inside the main body 2. When steam passes through the first filter screen 51 and moves upward, liquid moves downward inside the filler balls 52, so that steam and liquid exchange gas and liquid in the gaps between the filler balls 52, and the second filter screen 53 fixes the filler balls 52 to prevent steam from lifting the filler balls 52, so that the filler balls 52 are evenly distributed between the first filter screen 51 and the second filter screen 53.

[0027] Specifically, the heating mechanism 3 includes a heating tube 31 and a heating coil 32. The heating tube 31 is vertically installed at the bottom end of the main body 2, and the spiral heating coil 32 is installed inside the heating tube 31. In order to facilitate the entry of the raw materials into the interior of the heating tube 31, the heating coil 32 is heated, so that the temperature of the raw materials inside the heating tube 31 increases to generate steam, and the steam moves upward.

[0028] Specifically, the driving mechanism 4 includes a motor 41, a first gear 42, a second gear 43 and a rotating shaft 44. The motor 41 is installed at the top of the main body 2, one end of the motor 41 is fixedly connected to the second gear 43, and the bottom end of the first gear 42 is fixedly connected to the rotating shaft 44. The rotating shaft 44 is rotatably connected to the inside of the first filter 51 and the second filter 53, and the first gear 42 and the second gear 43 are rotatably connected to the inside of the top of the main body 2. In order to facilitate the rotation of the motor 41 to drive the second gear 43 to rotate, the second gear 43 vertically meshes with the first gear 42. The diameter of the second gear 43 is smaller than the diameter of the first gear 42, so that the second gear 43 drives the first gear 42 to rotate more labor-saving, and the speed of the first gear 42 is slowed down, so that the first gear 42 and the rotating shaft 44 rotate slowly inside the main body 2.

[0029] Specifically, the stirring mechanism 6 includes a scraping plate 61, a connecting rod 62, a nozzle 63, a fixed ball 64 and a support rod 65. The scraping plate 61 with an arc-shaped side wall is equidistantly installed on the bottom surface of the second filter 53, and the scraping plate 61 is slidably connected to the filler ball 52; the support rods 65 are evenly installed on the bottom surface of the second filter 53, and the hollow fixed ball 64 is installed at the bottom end of the support rod 65. The nozzle 63 tilted downward is equidistantly installed on the side wall of the fixed ball 64; the connecting rod 62 with a funnel-shaped interior at both ends is installed at the bottom end of the fixed ball 64, and the connecting rod 62, the fixed ball 64, the nozzle 63 and the support rod 65 are slidably connected to the side wall of the filler ball 52. The net 53 drives the connecting rod 62, the fixed ball 64, the nozzle 63 and the support rod 65 to rotate and squeeze the filler balls 52, so that the filler balls 52 rotate between the first filter screen 51 and the second filter screen 53, change the gap between the filler balls 52, and grind and crush the impurities between the filler balls 52, reduce the impurities between the first filter screen 51 and the second filter screen 53, and change the gap between the filler balls 52. At the same time, the second filter screen 53 drives the scraper plate 61 with an arc-shaped side wall to rotate, so that the scraper plate 61 flattens the filler balls 52 above the first filter screen 51, so that the filler balls 52 are evenly distributed between the first filter screen 51 and the second filter screen 53.

[0030] Specifically, the shortest distance between the bottom surface of the connecting rod 62 and the top surface of the first filter screen 51 is smaller than the diameter of the filler ball 52, and the inner diameter of the connecting rod 62 is smaller than the interior of the filler ball 52. In order to prevent the filler ball 52 from being stuck inside the connecting rod 62 and to prevent the filler ball 52 from being located between the connecting rod 62 and the top surface of the first filter screen 51, it is convenient for part of the steam that passes through the first filter screen 51 to enter the interior of the connecting rod 62, so that the steam enters the interior of the fixed ball 64, and the steam is ejected downward through the nozzle 63 on the side wall of the fixed ball 64, so that the steam quickly enters the interior of the filler ball 52, thereby accelerating the exchange efficiency and increasing the contact area between the steam and the liquid; the nozzle 63 is tilted downward to facilitate the liquid to slide down the side wall of the nozzle 63 and prevent the liquid from entering the interior of the nozzle 63. At the same time, the nozzle 63 makes the surface of the fixed ball 64 uneven, so that the fixed ball 64 can push the filler ball 52 to move inside the main body 2.

[0031] Specifically, the connecting mechanism 7 includes a connecting sleeve 71, a slot 72, a limiting rod 73, a sliding rod 74 and a support plate 75. The connecting sleeve 71 is equidistantly installed inside the main body 2. The inner part of the connecting sleeve 71 is inclined with the annular slot 72. The inner part of the slot 72 is slidably connected to the limiting rod 73 with a spherical end, and the bottom end of the limiting rod 73 with an "L"-shaped side wall is fixedly connected to the center of the top surface of the second filter screen 53; the support plate 75 is installed in the center of the bottom surface of the second filter screen 53. The internal mounting cross-section of 75 is the sliding rod 74 in a T-shape, and the sliding rod 74 is fixedly connected to the side wall of the rotating shaft 44. When the rotating shaft 44 rotates, the rotating shaft 44 drives the sliding rod 74 to rotate, and the sliding rod 74 rotates the support plate 75 and the second filter screen 53. The rotation of the second filter screen 53 drives the limiting rod 73 to rotate, and the limiting rod 73 rotates inside the slot 72. The slot 72 is tilted so that the limiting rod 73 continuously moves up and down along the slot 72. The second filter screen 53 is moved upward, and the limit rod 73 drives the second filter screen 53 and the support plate 75 to move up and down. The support plate 75 slides on the side wall of the slide rod 74. At the same time, the support plate 75 and the slide rod 74 are not separated, so that the slide rod 74 drives the support plate 75 and the second filter screen 53 to rotate. When the second filter screen 53 rotates upward, the gap between the second filter screen 53 and the second filter screen 51 increases, thereby increasing the movement space of the filler balls 52, facilitating the movement of the filler balls 52, and covering the gap between the filler balls 52. When the second filter screen 53 moves downward, the second filter screen 53 squeezes the filler balls 52 downward, increasing the squeezing force between the filler balls 52, and grinding the impurities between the filler balls 52. At the same time, the second filter screen 53 approaches the filler balls 52, and the second filter screen 53 drives the scraper plate 51 to contact the filler balls 52, flattening the filler balls 52 between the second filter screen 53 and the second filter screen 51, and compacting the filler balls 52 between the first filter screen 51 and the second filter screen 53. Moreover, the height of the support plate 75 is greater than the vertical distance between the top end of the slot 72 and the bottom end of the slot 72. When the support plate 75 moves up and down, the support plate 75 is prevented from being separated from the rotating rod 74, so that the rotating rod 74 always drives the support plate 75 and the second filter 53 to rotate.

[0032] During use, the device is powered on, raw materials are added to the interior of the heating cylinder 31 through the feed pipe 1 on the bottom side wall of the main body 2, and high-concentration liquid to be extracted is added to the interior of the main body 2 through the feed pipe 1 on the top side wall of the main body 2, causing the liquid to move downward within the main body 2. The heating coil 32 is turned on and heated, causing the raw materials to heat up inside the heating cylinder 31, generating steam, which moves upward. As the steam passes through the first filter 51 and moves upward, the liquid moves downward inside the filler balls 52, causing gas-liquid exchange between the steam and liquid in the gaps between the filler balls 52. At this time, part of the steam that passes through the first filter 51 enters the interior of the connecting rod 62, causing the steam to enter the interior of the fixed balls 64 and be ejected downward through the nozzle 63 on the side wall of the fixed balls 64, allowing the steam to quickly enter the interior of the filler balls 52, accelerating the exchange efficiency and increasing the contact area between the steam and liquid. The nozzle 63 is tilted downward to facilitate the liquid to slide down the side wall of the nozzle 63, preventing the liquid from entering the interior of the nozzle 63. The second filter screen 53 secures the packing balls 52, preventing them from being lifted up by steam. This ensures that the packing balls 52 are evenly distributed between the first filter screen 51 and the second filter screen 53, allowing the rectified steam to be discharged from the top of the main body 2. When the gaps between the packing balls 52 become clogged with impurities, reducing the efficiency of gas-liquid exchange, the motor 41 is turned on, driving the second gear 43 to rotate. The second gear 43 perpendicularly meshes with the first gear 42. The diameter of the second gear 43 is smaller than that of the first gear 42, making it easier for the second gear 43 to drive the first gear 42 to rotate. This also reduces the speed of the first gear 42, causing the first gear 42 and the rotating shaft 44 to rotate slowly within the main body 2.The second filter screen 53 drives the connecting rod 62, the fixed ball 64, the nozzle 63 and the support rod 65 to rotate and squeeze the filler ball 52, so that the filler ball 52 rotates between the first filter screen 51 and the second filter screen 53, changing the gap between the filler balls 52. At the same time, the rotating shaft 44 drives the sliding rod 74 to rotate, and the sliding rod 74 rotates to rotate the support plate 75 and the second filter screen 53. During the rotation of the second filter screen 53, the limiting rod 73 is driven to rotate. The limiting rod 73 rotates inside the slot 72. The slot 72 is tilted so that the limiting rod 73 continuously moves up and down along the slot 72. The limiting rod 73 drives the second filter screen 53 and the support plate 75 to move up and down. The support plate 75 slides on the side wall of the sliding rod 74. At the same time, the support plate 75 and the sliding rod 74 are not separated, so that The sliding rod 74 drives the support plate 75 and the second filter screen 53 to rotate. When the second filter screen 53 rotates upward, the gap between the second filter screen 53 and the second filter screen 51 increases, thereby increasing the movement space of the filler balls 52, facilitating the movement of the filler balls 52, and covering the gap between the filler balls 52. When the second filter screen 53 moves downward, the second filter screen 53 squeezes the filler balls 52 downward, increasing the squeezing force between the filler balls 52, and grinding the impurities between the filler balls 52. At the same time, the second filter screen 53 approaches the filler balls 52, and the second filter screen 53 drives the scraper plate 51 to contact the filler balls 52, flattening the filler balls 52 between the second filter screen 53 and the second filter screen 51, and compacting the filler balls 52 between the first filter screen 51 and the second filter screen 53; the compacted filler balls 52 can be used again.

[0033] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A light removal distillation tower, characterized in that: The invention comprises a feeding pipe (1), a main body (2), a heating mechanism (3), a driving mechanism (4), an exchange mechanism (5), a stirring mechanism (6) and a connecting mechanism (7); the side wall of the main body (2) is symmetrically mounted with the feeding pipe (1) for adding raw materials into the main body (2); the bottom end of the main body (2) is mounted with the heating mechanism (3) for heating the raw materials to evaporate the raw materials; the exchange mechanism (5) is mounted inside the main body (2) for gas-liquid exchange; the exchange mechanism (5) is internally rotatably connected to the stirring mechanism (6) for removing impurities inside the filler; the stirring mechanism (6) is connected to the driving mechanism (4) for driving the stirring mechanism (6) to rotate; the side wall of the driving mechanism (4) is rotatably connected to the connecting mechanism (7) for driving the exchange mechanism (5) to move up and down, and the connecting mechanism (7) is connected to the side wall of the exchange mechanism (5); The exchange mechanism (5) comprises a first filter screen (51), filler balls (52) and a second filter screen (53); the first filter screen (51) is equidistantly installed inside the main body (2); the second filter screen (53) is slidably connected inside the main body (2); a plurality of filler balls (52) are equidistantly placed between the first filter screen (51) and the second filter screen (53); and the diameters of the first filter screen (51) and the second filter screen (53) are equal to the maximum inner diameter of the main body (2); The driving mechanism (4) comprises a motor (41), a first gear (42), a second gear (43) and a rotating shaft (44); the motor (41) is installed at the top of the main body (2); one end of the motor (41) is fixedly connected to the second gear (43); the second gear (43) is vertically meshed with the first gear (42); the bottom end of the first gear (42) is fixedly connected to the rotating shaft (44); the rotating shaft (44) is rotatably connected to the inside of the first filter (51) and the second filter (53); and the first gear (42) and the second gear (43) are rotatably connected to the inside of the top of the main body (2); The stirring mechanism (6) comprises a scraping plate (61), a connecting rod (62), a nozzle (63), a fixed ball (64) and a support rod (65); the scraping plate (61) with an arc-shaped side wall is equidistantly installed on the bottom surface of the second filter (53); the scraping plate (61) is slidably connected to the filler ball (52); the support rod (65) is evenly installed on the bottom surface of the second filter (53); the hollow fixed ball (64) is installed at the bottom end of the support rod (65); the nozzle (63) inclined downward is equidistantly installed on the side wall of the fixed ball (64); the connecting rod (62) with a funnel-shaped interior at both ends is installed at the bottom end of the fixed ball (64); the connecting rod (62), the fixed ball (64), the nozzle (63) and the support rod (65) are slidably connected to the side wall of the filler ball (52); The shortest distance between the bottom surface of the connecting rod (62) and the top surface of the first filter screen (51) is smaller than the diameter of the filler ball (52), and the inner diameter of the connecting rod (62) is smaller than the inner diameter of the filler ball (52); The connecting mechanism (7) comprises a connecting sleeve (71), a slot (72), a limiting rod (73), a sliding rod (74) and a support plate (75); the connecting sleeve (71) is equidistantly installed inside the main body (2); the connecting sleeve (71) is inclinedly provided with an annular slot (72) inside; the slot (72) is internally slidably connected to the limiting rod (73) with a spherical end, and the bottom end of the limiting rod (73) with an "L"-shaped side wall is fixedly connected to the center of the top surface of the second filter (53); the support plate (75) is installed at the center of the bottom surface of the second filter (53); the sliding rod (74) with a "T"-shaped cross section is installed inside the support plate (75), and the sliding rod (74) is fixedly connected to the side wall of the rotating shaft (44); and the height of the support plate (75) is greater than the vertical distance between the top end of the slot (72) and the bottom end of the slot (72); The raw material is passed through the feed pipe 1 on the bottom side wall of the main body 2 to heat the interior of the cylinder 31, and the high-concentration liquid to be extracted is added to the interior of the main body 2 through the feed pipe 1 on the top side wall of the main body 2, so that the liquid moves downward inside the main body 2; the temperature of the raw material rises inside the heating cylinder 31 to generate steam, which moves upward; There are multiple groups of exchange mechanisms, stirring mechanisms and connecting mechanisms; The heating mechanism (3) comprises a heating cylinder (31) and a heating coil (32); the heating cylinder (31) is vertically mounted at the bottom end of the main body (2), and the spiral heating coil (32) is mounted inside the heating cylinder (31).

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