阅读说明：本技术 一种生产正庚烷用再沸器 (Reboiler for producing normal heptane ) 是由 孙少义 于 2021-09-23 设计创作，主要内容包括：本发明涉及正庚烷生产设备技术领域,且公开了一种生产正庚烷用再沸器,包括再沸器壳体,所述再沸器壳体一端的内侧分别活动套接有主传动机构和固定套接有密封隔板,所述主传动机构的外侧活动套接有中空板,且中空板的顶部与再沸器壳体一端的内壁之间固定安装有第二过渡管,所述主传动机构一端的表面啮合连接有第一除垢机构。本发明通过所设置的主传动机构、第一除垢机构、第二除垢机构组成自动化除垢结构,具体可在整体设备不停机的情况下对第一换热管与第二换热管两者的内壁进行自动化除垢,进而避免物料垢堆积在第一换热管与第二换热管内壁上,提升第一换热管与第二换热管的换热效果的同时提升两者的使用寿命。(The invention relates to the technical field of normal heptane production equipment, and discloses a reboiler for producing normal heptane, which comprises a reboiler shell, wherein the inner side of one end of the reboiler shell is respectively and movably sleeved with a main transmission mechanism and fixedly sleeved with a sealing partition plate, the outer side of the main transmission mechanism is movably sleeved with a hollow plate, a second transition pipe is fixedly installed between the top of the hollow plate and the inner wall of one end of the reboiler shell, and the surface of one end of the main transmission mechanism is in meshing connection with a first descaling mechanism. According to the invention, the automatic descaling structure is formed by the main transmission mechanism, the first descaling mechanism and the second descaling mechanism, and particularly, the inner walls of the first heat exchange tube and the second heat exchange tube can be automatically descaled under the condition that the whole equipment is not shut down, so that material scales are prevented from being accumulated on the inner walls of the first heat exchange tube and the second heat exchange tube, the heat exchange effect of the first heat exchange tube and the second heat exchange tube is improved, and the service life of the first heat exchange tube and the second heat exchange tube is prolonged.)

1. A reboiler for the production of n-heptane comprising a reboiler shell (1), characterized in that: the inner side of one end of the reboiler shell (1) is movably sleeved with a main transmission mechanism (6) and fixedly sleeved with a sealing partition plate (18), the outer side of the main transmission mechanism (6) is movably sleeved with a hollow plate (11), a second transition pipe (19) is fixedly installed between the top of the hollow plate (11) and the inner wall of one end of the reboiler shell (1), the surface of one end of the main transmission mechanism (6) is meshed with a first descaling mechanism (7), the surface of one end of the first descaling mechanism (7) is meshed with a second descaling mechanism (8), one ends of the first descaling mechanism (7) and the second descaling mechanism (8) are movably sleeved with the inner part of the sealing partition plate (18), the outer side of the other end of the first descaling mechanism (7) is clamped with a first heat exchange pipe (9), and the outer side of the other end of the second descaling mechanism (8) is clamped with a second heat exchange pipe (10), the utility model discloses a heat exchanger, including first heat exchange tube (9), the side of the equal fixed connection in sealed baffle (18) one side of one end of first heat exchange tube (9) and the one end of second heat exchange tube (10), the inside both sides of second heat exchange tube (10) one end are fixed respectively and have been cup jointed second intake pipe (12) and second blast pipe (13), sealed baffle (18) are all run through to the one end of second intake pipe (12) and the one end of second blast pipe (13), and the fixed inside of cup jointing in well hollow plate (11) of one end of second intake pipe (12), the both ends of first heat exchange tube (9) are fixedly connected with first transition pipe (15) and compound pipe fitting (16) respectively, the one end fixedly connected with third of first transition pipe (15) is advanced and is managed (14), and the fixed inside of cup jointing in well hollow plate (11) of third is advanced and managed (14), the one end of compound pipe fitting (16) bottom is run through sealed baffle (18) respectively, The hollow plate (11) is fixedly sleeved on the inner side of one end of the reboiler shell (1).

2. The reboiler for producing n-heptane as recited in claim 1, wherein: the inside of main drive mechanism (6) is including transfer line (61), and the one end fixedly connected with driving gear (62) of transfer line (61), the inboard at reboiler casing (1) one end is cup jointed in equal activity in transfer line (61) middle part and driving gear (62), the other end of transfer line (61) runs through the inner wall and the protrusion of reboiler casing (1) one side, and the through connection department between transfer line (61) and reboiler casing (1) installs the sealing washer, the other end fixedly connected with band-type brake step motor of transfer line (61), and band-type brake step motor's bottom fixedly connected with support frame (17), the fixed surface at the top of support frame (17) opposite side and reboiler casing (1) middle part is connected.

3. The reboiler for producing n-heptane as recited in claim 2, wherein: the inside of first descaling mechanism (7) is including first being sent gear (71), and first being sent gear (71) and transfer line (61) meshing connection, first being sent gear (71) side fixedly connected with first movable rod (72), the one end activity of first movable rod (72) is cup jointed in the inboard of sealed baffle (18), and first being sent gear (71) and sealed baffle (18) junction and install first micro bearing (73) and sealing washer (74) for the first axle respectively, the fixed surface of the first movable rod (72) other end is connected with first scraper blade (75), the surface at first scraper blade (75) top and the surface at bottom all closely laminate with the inner wall of first heat exchange tube (9), and first scraper blade (75) perpendicular to the inside of first heat exchange tube (9).

4. A reboiler for the production of n-heptane as claimed in claim 2 or 3, wherein: the inside of second descaling mechanism (8) is sent gear (81) including the second, and the second is sent gear (81) and first being sent gear (71) meshing connection, the side fixedly connected with second movable rod (82) of gear (81) one side is sent to the second, the one end of second movable rod (82) also activity cup joints the inboard at sealed baffle (18), and the second is sent gear (81) and sealed baffle (18) junction and install second micro bearing (83) and for the second shaft sealing washer (84) respectively, the fixed surface of second movable rod (82) other end is connected with second scraper blade (85), the surface of second scraper blade (85) top and the surface of bottom all closely laminate with the inner wall of second heat exchange tube (10), and the inside of second heat exchange tube (10) is perpendicular to second scraper blade (85).

5. The reboiler for producing n-heptane as recited in claim 1, wherein: the composite pipe fitting (16) comprises a concentration ring pipe (161) inside, one side of the concentration ring pipe (161) is fixedly sleeved with one end of a first heat exchange pipe (9), a guide pipe (162) is fixedly sleeved on the inner side of the bottom of the concentration ring pipe (161), and one end of the guide pipe (162) penetrates through the sealing partition plate (18) and the hollow plate (11) and protrudes.

6. The reboiler for producing n-heptane as recited in claim 1, wherein: the top at reboiler casing (1) both ends is fixed mounting respectively has first intake pipe (2) and first exhaust pipe (4), and the bottom at reboiler casing (1) both ends is fixed mounting respectively has first drain pipe (3) and auxiliary liquid pipe (5), the equal fixedly connected with ring flange of one end that reboiler casing (1) was kept away from to auxiliary liquid pipe (5), first exhaust pipe (4), first drain pipe (3), first intake pipe (2) four, and first drain pipe (3) align with first intake pipe (2), and auxiliary liquid pipe (5) align with first exhaust pipe (4), the bottom of first intake pipe (2) is in the same place with the top fixed connection of second transition pipe (19).

7. The reboiler for producing n-heptane as recited in claim 1, wherein: the end face of one end of the second exhaust pipe (13) is fixedly connected with the surface of the hollow plate (11), and the hollow plate (11) is not in contact with a transmission rod (61) and a driving gear (62) inside the main transmission mechanism (6), a second sent gear (81) inside the second descaling mechanism (8) and a first sent gear (71) inside the first descaling mechanism (7).

Technical Field

The invention relates to the technical field of n-heptane production equipment, in particular to a reboiler for producing n-heptane.

Background

N-heptane is an organic compound of formula C₇H₁₆. The reboiler is one of the indispensable devices in the production process of normal heptane, the reboiler vaporizes the liquid again as the name suggests, the structure of the reboiler is similar to that of a condenser, but one is used for cooling, and the reboiler is used for heating and vaporizing, but the reboiler used in the production of normal heptane still has some problems to be solved, mainly the reboiler is used for long-term operationAfter the phase is used, can knot the material dirt in the heating pipe, when the dirt layer is more and more thick, production efficiency reduces, can cause the stop production accident when serious, consequently, to above-mentioned problem, this application will provide a production reboiler for n-heptane and solve.

Disclosure of Invention

The invention provides a reboiler for producing n-heptane, which solves the problems in the background technology.

The invention provides the following technical scheme: a reboiler for producing n-heptane comprises a reboiler shell, wherein a main transmission mechanism and a sealing partition plate are movably sleeved on the inner side of one end of the reboiler shell respectively, a hollow plate is movably sleeved on the outer side of the main transmission mechanism, a second transition pipe is fixedly installed between the top of the hollow plate and the inner wall of one end of the reboiler shell, a first descaling mechanism is connected to one end of the main transmission mechanism in a surface meshing manner, a second descaling mechanism is connected to one end of the first descaling mechanism in a surface meshing manner, the sealing partition plate is movably sleeved at one ends of the first descaling mechanism and the second descaling mechanism respectively, a first heat exchange pipe is clamped on the outer side of the other end of the first descaling mechanism, a second heat exchange pipe is clamped on the outer side of the other end of the second descaling mechanism, one end of the first heat exchange pipe and one end of the second heat exchange pipe are fixedly connected to the side of one side of the sealing partition plate, the inside both sides of second heat exchange tube one end are fixed respectively and have been cup jointed second intake pipe and second blast pipe, the one end of second intake pipe and the one end of second blast pipe all run through sealed partition, and the fixed cover of the one end of second intake pipe connects the inside at well cavity board, the both ends of first heat exchange tube are the first transition pipe of fixedly connected with and compound pipe fitting respectively, the one end fixedly connected with third admission pipe of first transition pipe, and the fixed cover of the one end of third admission pipe connects the inside at well cavity board, the one end of compound pipe fitting bottom runs through sealed partition respectively, the fixed inboard at reboiler casing one end of well cavity board.

The choice, main drive mechanism's inside is including the transfer line, and the one end fixedly connected with driving gear of transfer line, the inboard at reboiler casing one end is cup jointed with the equal activity of driving gear in transfer line middle part, the other end of transfer line runs through the inner wall and the protrusion of reboiler casing one side, and the through connection department between transfer line and the reboiler casing installs the sealing washer, the other end fixedly connected with band-type brake step motor of transfer line, and band-type brake step motor's bottom fixedly connected with support frame, the top of support frame opposite side and the fixed surface at reboiler casing middle part are connected.

Carefully, the inside of first descaling mechanism is including the first gear that is sent, and the first gear that is sent is connected with the transfer line meshing, the first movable rod of side fixedly connected with of sending gear one side, the one end activity of first movable rod is cup jointed in the inboard of sealed bulkhead, and the first gear that is sent installs first miniature bearing and sealing washer for the primary shaft respectively with the junction of sealed bulkhead, the fixed surface of the first movable rod other end is connected with first scraper blade, the surface at first scraper blade top and the surface of bottom all closely laminate with the inner wall of first heat exchange tube, and the inside of first scraper blade perpendicular to first heat exchange tube.

Carefully, the inside of second descaling mechanism is sent the gear including the second, and the second is sent the gear and is sent the gear meshing to be connected with first being sent, the second is sent the side fixedly connected with second movable rod of gear one side, the one end of second movable rod is also the activity cup joint in sealed bulkhead's inboard, and the second is sent the gear and is installed second micro bearing and sealing washer for the second shaft respectively with sealed bulkhead's junction, the fixed surface of the second movable rod other end is connected with the second scraper blade, the surface at the surface of second scraper blade top and the surface of bottom all closely laminate with the inner wall of second heat exchange tube, and the inside of second scraper blade perpendicular to second heat exchange tube.

Carefully, the composite pipe fitting comprises a concentration ring pipe, one side of the concentration ring pipe is fixedly sleeved with one end of the first heat exchange pipe, a guide pipe is fixedly sleeved on the inner side of the bottom of the concentration ring pipe, and one end of the guide pipe penetrates through the sealing partition plate and the hollow plate respectively and protrudes.

Carefully, the top at reboiler casing both ends is fixed mounting respectively has first intake pipe and first exhaust pipe, and the bottom at reboiler casing both ends is fixed mounting respectively has first drain pipe and supplementary liquid pipe, the equal fixedly connected with ring flange of one end that reboiler casing was kept away from to supplementary liquid pipe, first exhaust pipe, first drain pipe, first intake pipe four, and first drain pipe aligns with first intake pipe, and supplementary liquid pipe aligns with first exhaust pipe, the bottom of first intake pipe is in the same place with the top fixed connection of second transition pipe.

Carefully, the terminal surface of second blast pipe one end and the fixed surface of well hollow plate are connected, and well hollow plate and the inside transfer line and the driving gear of main drive mechanism, the inside second of second descaling mechanism are sent the gear and the inside first of being sent the gear of first descaling mechanism and are all contactless.

The invention has the following beneficial effects:

1. according to the invention, the automatic descaling structure is formed by the main transmission mechanism, the first descaling mechanism and the second descaling mechanism, and particularly, the inner walls of the first heat exchange tube and the second heat exchange tube can be automatically descaled under the condition that the whole equipment is not shut down, so that material scales are prevented from being accumulated on the inner walls of the first heat exchange tube and the second heat exchange tube, the heat exchange effect of the first heat exchange tube and the second heat exchange tube is improved, and the service life of the first heat exchange tube and the second heat exchange tube is prolonged.

2. The reboiler comprises a reboiler shell, a first air inlet pipe, a first liquid discharge pipe, a first exhaust pipe and an auxiliary liquid pipe, wherein the reboiler shell, the first air inlet pipe, the first liquid discharge pipe, the first exhaust pipe and the auxiliary liquid pipe form a reboiler main body, the second transition pipe, the second air inlet pipe, the second exhaust pipe, the first heat exchange pipe, the second heat exchange pipe, the hollow plate, the second air inlet pipe and the composite pipe form a module type heat exchange pipe, and after the second transition pipe, the second air inlet pipe, the second exhaust pipe, the first heat exchange pipe, the second heat exchange pipe, the hollow plate, the second air inlet pipe and the composite pipe are matched for use, the use requirement on temperature rise and vaporization of a target product can be met, and meanwhile, the reboiler main body is convenient to maintain and replace.

Drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present invention;

FIG. 2 is a schematic view, partially in section, of a second heat exchange tube of the construction of the present invention;

FIG. 3 is a schematic front view of a first descaling mechanism according to the present invention;

FIG. 4 is a schematic partial cross-sectional view of a reboiler shell of the present invention configuration;

FIG. 5 is a schematic front view of the structure of the present invention;

FIG. 6 is an enlarged view of the point A in FIG. 1 according to the present invention.

In the figure: 1. a reboiler housing; 2. a first intake pipe; 3. a first drain pipe; 4. a first exhaust pipe; 5. an auxiliary liquid pipe; 6. a main transmission mechanism; 61. a transmission rod; 62. a driving gear; 7. a first descaling mechanism; 71. a first gear to be fed; 72. a first movable bar; 73. a first micro bearing; 74. a seal ring for the first shaft; 75. a first squeegee; 8. a second descaling mechanism; 81. a second gear to be fed; 82. a second movable bar; 83. a second micro-bearing; 84. a seal ring for the second shaft; 85. a second squeegee; 9. a first heat exchange tube; 10. a second heat exchange tube; 11. a hollow plate; 12. a second intake pipe; 13. a second exhaust pipe; 14. a third inlet pipe; 15. a first transition duct; 16. compounding pipe fittings; 161. a centralized ring pipe; 162. a flow guide pipe; 17. a support frame; 18. sealing the partition plate; 19. a second transition duct.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, 3, 5, 6, a reboiler for producing n-heptane comprises a reboiler shell 1, wherein a first gas inlet pipe 2 and a first gas outlet pipe 4 are respectively fixedly installed at the top of two ends of the reboiler shell 1, a first liquid outlet pipe 3 and an auxiliary liquid pipe 5 are respectively fixedly installed at the bottom of two ends of the reboiler shell 1, the auxiliary liquid pipe 5, the first gas outlet pipe 4, the first liquid outlet pipe 3, and one end of the first gas inlet pipe 2 away from the reboiler shell 1 are all fixedly connected with a flange, the first liquid outlet pipe 3 is aligned with the first gas inlet pipe 2, the auxiliary liquid pipe 5 is aligned with the first gas outlet pipe 4, the bottom of the first gas inlet pipe 2 is fixedly connected with the top of a second transition pipe 19, the reboiler shell 1, the first gas inlet pipe 2, the first liquid outlet pipe 3, the first gas outlet pipe 4, and the auxiliary liquid outlet pipe 5 form a reboiler body, and subsequently installed components provide a supporting space, the inner side of one end of the reboiler shell 1 is movably sleeved with a main transmission mechanism 6 and fixedly sleeved with a sealing partition plate 18, the inner part of the main transmission mechanism 6 comprises a transmission rod 61, one end of the transmission rod 61 is fixedly connected with a driving gear 62, the middle part of the transmission rod 61 and the driving gear 62 are movably sleeved on the inner side of one end of the reboiler shell 1, the other end of the transmission rod 61 penetrates through the inner wall of one side of the reboiler shell 1 and protrudes, a sealing ring is arranged at the penetrating joint between the transmission rod 61 and the reboiler shell 1, the other end of the transmission rod 61 is fixedly connected with a contracting brake stepping motor, the bottom of the contracting brake stepping motor is fixedly connected with a support frame 17, the top of the other side of the support frame 17 is fixedly connected with the surface of the middle part of the reboiler shell 1, the main transmission mechanism 6 can provide periodic rotating power for parts arranged by the main transmission mechanism 6 subsequently, and the basic condition of automatic operation is met, a hollow plate 11 is movably sleeved on the outer side of a main transmission mechanism 6, a second transition pipe 19 is fixedly installed between the top of the hollow plate 11 and the inner wall of one end of a reboiler shell 1, a first descaling mechanism 7 is connected on the surface of one end of the main transmission mechanism 6 in a meshing manner, a second descaling mechanism 8 is connected on the surface of one end of the first descaling mechanism 7 in a meshing manner, the interiors of a sealing partition plate 18 are movably sleeved on one ends of the first descaling mechanism 7 and the second descaling mechanism 8, a first heat exchange pipe 9 is clamped on the outer side of the other end of the first descaling mechanism 7, a first fed gear 71 is arranged in the first descaling mechanism 7 and is connected with a transmission rod 61 in a meshing manner, a first movable rod 72 is fixedly connected on the side surface of one side of the first fed gear 71, one end of the first movable rod 72 is movably sleeved on the inner side of the sealing partition plate 18, and a first micro bearing 73 and a first shaft sealing ring 74 are respectively installed at the joint of the first fed gear 71 and the sealing partition plate 18, the surface of the other end of the first movable rod 72 is fixedly connected with a first scraper 75, the surface of the top and the surface of the bottom of the first scraper 75 are both tightly attached to the inner wall of the first heat exchange tube 9, the first scraper 75 is vertical to the inside of the first heat exchange tube 9, after the first descaling mechanism 7 is used together with the main transmission mechanism 6, the automatic descaling can be carried out on the inner wall of the first heat exchange tube 9 under the condition that the whole equipment is not stopped, the second heat exchange tube 10 is clamped on the outer side of the other end of the second descaling mechanism 8, the inside of the second descaling mechanism 8 comprises a second fed gear 81, the second fed gear 81 is meshed with the first fed gear 71, the side surface of one side of the second fed gear 81 is fixedly connected with a second movable rod 82, one end of the second movable rod 82 is also movably sleeved on the inner side of the sealing partition 18, and the joint of the second fed gear 81 and the sealing partition 18 is respectively provided with a second micro bearing 83 and a sealing ring 84 for a second shaft, the surface of the other end of the second movable rod 82 is fixedly connected with a second scraper 85, the surface of the top and the surface of the bottom of the second scraper 85 are tightly attached to the inner wall of the second heat exchange tube 10, the second scraper 85 is perpendicular to the inside of the second heat exchange tube 10, the main transmission mechanism 6, the first descaling mechanism 7 and the second descaling mechanism 8 form a multiple automatic descaling structure, and specifically, the automatic descaling can be performed on the inner walls of the first heat exchange tube 9 and the second heat exchange tube 10 under the condition that the whole equipment is not shut down, so that material scale is prevented from being accumulated on the inner walls of the first heat exchange tube 9 and the second heat exchange tube 10, the heat exchange effect of the first heat exchange tube 9 and the second heat exchange tube 10 is improved, and the service lives of the first heat exchange tube 9 and the second heat exchange tube 10 are prolonged.

Referring to fig. 2 and 4, one end of the first heat exchanging pipe 9 and one end of the second heat exchanging pipe 10 are both fixedly connected to a side surface of one side of the sealing partition 18, two sides of an inside of one end of the second heat exchanging pipe 10 are respectively and fixedly sleeved with the second air inlet pipe 12 and the second air outlet pipe 13, an end surface of one end of the second air outlet pipe 13 is fixedly connected to a surface of the hollow plate 11, the hollow plate 11 is not in contact with the driving rod 61 and the driving gear 62 inside the main transmission mechanism 6, the second driven gear 81 inside the second descaling mechanism 8 and the first driven gear 71 inside the first descaling mechanism 7, an end surface of one end of the second air outlet pipe 13 is fixedly connected to a surface of the hollow plate 11 and can support each other, so as to enhance structural strength, position constraints of each structure can reduce friction loss of moving parts, one end of the second air inlet pipe 12 and one end of the second air outlet pipe 13 both penetrate through the sealing partition 18, one end of the second air inlet pipe 12 is fixedly sleeved inside the hollow plate 11, two ends of the first heat exchange pipe 9 are respectively and fixedly connected with a first transition pipe 15 and a composite pipe 16, the composite pipe 16 comprises a concentration ring pipe 161 inside, one side of the concentration ring pipe 161 is fixedly sleeved with one end of the first heat exchange pipe 9, the inner side of the bottom of the concentration ring pipe 161 is fixedly sleeved with a flow guide pipe 162, one end of the flow guide pipe 162 penetrates through the sealing partition plate 18 and the hollow plate 11 respectively and protrudes, the composite pipe 16 is used as a further extension of the inner space of the first heat exchange pipe 9, but the composite pipe 16 does not participate in heat exchange, one end of the first transition pipe 15 is fixedly connected with the third inlet pipe 14, and one end of the third inlet pipe 14 is fixedly sleeved inside the hollow plate 11, and one end of the bottom of the composite pipe 16 penetrates through the sealing partition 18 and the hollow plate 11 respectively and is fixedly sleeved inside one end of the reboiler shell 1.

The working principle is as follows: when the device is used, a target raw material to be heated and vaporized is added to the inner side of the other side of the reboiler shell 1 through a pumping mechanism connected with the auxiliary liquid pipe 5, after the completion, the auxiliary liquid pipe 5 is adjusted to be in a closed state, high-temperature steam is conveyed to the inside of the hollow plate 11 through the first air inlet pipe 2 and the second transition pipe 19, the high-temperature steam entering the inside of the hollow plate 11 enters the inside of the first heat exchange pipe 9 and the second heat exchange pipe 10 through the second air inlet pipe 12 and the third air inlet pipe 14 and the first transition pipe 15 respectively, then the target raw material placed in the inside of the other side of the reboiler shell 1 is subjected to heating and vaporization treatment, gas generated by the target raw material is discharged into equipment of a next procedure through the first exhaust pipe 4, condensate in the first heat exchange pipe 9 and the second heat exchange pipe 10 is separated and guided to flow down through the first scraper 75 in the first descaling mechanism 7 and the second scraper 85 in the second descaling mechanism 8, and then flows through the first heat exchange pipe 9 and the second heat exchange pipe 10 The heat pipes 10 respectively flow into the second exhaust pipe 13 and the composite pipe 16, and are then uniformly discharged to the inner side of one end of the reboiler shell 1 through the second exhaust pipe 13 and the composite pipe 16, and finally are uniformly collected through the first liquid discharge pipe 3, and when the first heat exchange pipe 9 and the second heat exchange pipe 10 are used for descaling at one end time, without stopping the machine, the band-type brake stepper motor connected with the other end of the main transmission mechanism 6 is started to drive the driving gear 62 to periodically rotate, and then under the action of meshing transmission, the first sent gear 71 in the first descaling mechanism 7 drives the first movable rod 72 and the first scraper 75, and the second movable rod 82 and the second scraper 85 in the second descaling mechanism 8 to synchronously and periodically rotate, so as to respectively scrape off material scales on the inner walls of the first heat exchange pipe 9 and the second heat exchange pipe 10, and the material scales generated in the first heat exchange pipe 9 and the second heat exchange pipe 10 are scraped off with the coolant in the respective pipes to be scraped off And after cooling, steam flows out, and automatic operation is realized.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Meanwhile, in the drawings of the invention, the filling pattern is only used for distinguishing the layers and is not limited at all.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.