High-sealing tower and heavy water rectification system

Abstract

The utility model discloses a high sealing tower device, including tower body and support seat, the tower body is divided into a plurality of tower sections along the height direction, every two adjacent tower sections are connected through a flange, the flange butt joint surface is sealed and connected through welding, the support seat is arranged at the floor position through which the tower body passes, the support seat includes a plurality of groups of support assemblies, and the support assemblies are connected through the flange butt joint surface. The supporting assemblies of the supporting base are evenly arranged around the vertical axis of the tower body at the same height. The high-sealing tower is simple in overall structure, convenient to manufacture and install, good in sealing performance, high in stability and capable of being suitable for the heavy water rectification process. The utility model further provides a heavy water rectification system.

Description

Technical Field

[0001] The utility model specifically relates to a high-sealing tower and a heavy water distillation system. Background Art

[0002] High-sealed tower refers specifically to a packed tower used in the heavy water distillation system of the nuclear power industry. Due to the high radioactivity of heavy water, certain measures must be taken to prevent heavy water leakage during the heavy water distillation process. This requires that the tower used for heavy water distillation must have a high degree of sealing, and that heavy water cannot come into direct contact with high-molecular organic materials.

[0003] The existing distillation tower or packed tower usually adopts commonly used sealing gaskets (such as fluororubber, EPDM, etc. made of organic polymer materials) to achieve the sealing of the tower. Even if a small amount of leakage occurs in this tower, the loss caused is not large, and the sealing requirement is not very high. However, the conventional sealing gasket sealing method adopted by the existing distillation tower or packed tower, first of all, its sealing level cannot meet the needs of heavy water distillation, and the conventional sealing gasket material is not suitable for heavy water distillation. Therefore, the conventionally commonly used sealing gaskets cannot be used on the high-sealing tower in the field of heavy water distillation, which increases the difficulty of designing and manufacturing the high-sealing tower of heavy water distillation. In addition, for the sake of safety and leakage prevention, the high-sealing tower must also have the ability to cope with special working conditions such as earthquakes, so the sealing stability must be considered. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a high-sealing tower in view of the above-mentioned deficiencies in the prior art, which has a simple overall structure, is easy to manufacture and install, has good sealing performance, strong stability, and can be applied to the heavy water distillation process. The utility model also provides a heavy water distillation system.

[0005] The utility model provides a high-sealing tower, comprising a tower body and a support base, wherein the tower body is divided into multiple tower sections along the height direction, two adjacent tower sections are connected by flanges, and the flange butt surfaces are sealed by welding, the support base is arranged around the outer periphery of the tower body, the support base comprises multiple groups of support components, and the support components of the support base are evenly arranged around the vertical axis of the tower body at the same height.

[0006] Furthermore, the support seat is arranged at the floor through which the tower body passes, and each group of the support components of the support seat includes an installation unit, and the installation unit includes an embedded steel plate, a fixing seat, connecting bolts and a support member. The embedded steel plate is embedded on the surface of the floor where the support seat is located, and the fixing seat is fixedly connected to the embedded steel plate. One end of the support member is connected to the fixing seat by a connecting bolt, and the other end is provided with a curved surface adapted to the outer surface of the tower body for supporting the tower body.

[0007] Furthermore, each group of the support components includes two groups of installation units, and the two groups of installation units are symmetrically arranged on the upper and lower surfaces of the floor where the support base is located.

[0008] Furthermore, in the support member, there is a gap of a set width between the end portion of the support member which is provided with a curved surface adapted to the outer surface of the tower body and the tower body.

[0009] Furthermore, the support seats are provided in multiple groups, and each group of support seats is evenly distributed along the height direction of the tower body.

[0010] Furthermore, at least one tower section is provided with a manhole, which is sealed by a cover plate, the cover plate and the edge of the manhole are connected by a flange, and the flange joint surfaces are sealed by welding.

[0011] Furthermore, a mirror hole is provided on the cover plate, and a mirror device is provided at the mirror hole, wherein the mirror device comprises a pressure cover, a mirror, a gasket and a fixing part, wherein the pressure cover is connected to the mirror hole through the fixing part, and the mirror is clamped between the pressure cover and the edge of the mirror hole, and the gasket is padded between the mirror and the pressure cover.

[0012] Furthermore, the flange includes a welding lip and a flange ring, and the flange ring is provided with a connecting hole allowing a fastener to pass through. The welding lip and the flange ring both radially protrude from the outer surface of the component and are arranged at the docking position of the component. Compared with the welding lip, the flange ring is farther away from the docking surface, and the connecting hole is farther away from the outer surface of the component than the top of the welding lip. After the adjacent components are docked, the welding lips that are docked with each other are welded to achieve a sealed connection, and the corresponding flange rings are connected by fasteners to achieve further fixation.

[0013] Furthermore, the flange also includes a buffer pad, which is arranged between the welding lips that are butt-jointed with each other.

[0014] Furthermore, the high-sealing tower also includes a connecting pipe, and an outlet is provided at the top of the tower section at the highest point of the tower body. The outlet is connected to the inlet of an external condenser through the connecting pipe, and the middle part of the connecting pipe is a retractable bellows structure.

[0015] Furthermore, the high-seal tower also includes a skirt, the bottom of the lowest tower section of the tower body is an arc-shaped structure, the top of the skirt is adapted to the arc-shaped structure, the skirt is installed between the tower body and the civil foundation, and is connected to the civil foundation by anchor bolts.

[0016] Furthermore, the high-seal tower also includes a skirt template, which is in a sheet-like structure and is padded between the skirt and the civil foundation. The skirt template is provided with through holes that allow anchor bolts to pass through.

[0017] The utility model also provides a heavy water distillation system, comprising a condenser, a reboiler, a kettle vaporizer, a vacuum pump and the above-mentioned high-sealing tower, wherein the high-sealing tower is respectively connected to the condenser, the reboiler, the kettle vaporizer and the vacuum pump through pipelines.

[0018] The high-sealing tower of the utility model is connected by flanges between the tower sections, and the flange joint surfaces are sealed by welding. The tower sections of the tower are welded as much as possible to achieve the sealing of the tower. The traditional gasket sealing method is replaced by welding. On the one hand, the sealing performance is high and reliable, avoiding accidents such as leakage. On the other hand, it can also avoid direct contact between heavy water and polymer organic materials, meeting the requirements of heavy water distillation. A support seat surrounding the tower body is arranged outside the tower body, which can provide a stable, uniform and reliable radial support force for the tower body, effectively avoiding special working conditions such as earthquakes that cause the tower body to tilt, thereby avoiding the tower body tilting to affect the welds between the tower sections and cause leakage at the seal, that is, further ensuring the stability of the sealed connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the high sealing tower in Example 1 of the utility model;

[0020] Figure 2 yes Figure 1 AA view in;

[0021] Figure 3 yes Figure 1 A magnified view of the structure at the X in the middle;

[0022] Figure 4 yes Figure 1 A magnified view of the structure at Y in the middle;

[0023] Figure 5 yes Figure 1 Enlarged view of the structure at Z in the middle.

[0024] In the figure: 1. tower body; 11. tower section; 12. flange; 121. welding lip; 122. flange ring; 123. connecting hole; 124. fastener; 125. buffer pad; 13. outlet; 14. tower internals; 2. support seat; 21. embedded steel plate; 22. fixing seat; 23. connecting bolt; 24. support member; 3. floor slab; 4. connecting pipe; 5. bellows; 6. skirt seat; 61. anchor bolt; 7. skirt seat template; 8. cover plate; 9. sight glass device; 91. pressure cover; 92. sight glass; 93. gasket; 94. fixing member. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solution in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "upper", "lower" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of the present invention, the terms "first", "second" and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "setting", "installation", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0029] Example 1

[0030] like Figure 1 and Figure 2 As shown, the high-sealing tower of this embodiment includes a tower body 1 and a support base 2. The tower body 1 is divided into multiple tower sections 11 along the height direction. Two adjacent tower sections 11 are connected by flanges 12. The flange 12 joint surfaces are sealed by welding. The support base 2 is arranged around the outer periphery of the tower body 1. The support base 2 includes multiple groups of support components. The support components of the support base 2 are evenly arranged around the vertical axis of the tower body 1 at the same height.

[0031] Each tower section 11 of the tower vessel is sealed by welding as much as possible, and the traditional gasket sealing method is replaced by welding. On the one hand, the sealing performance is high and reliable, avoiding accidents such as leakage, and on the other hand, it can also avoid direct contact between heavy water and polymer organic materials, meeting the requirements of heavy water distillation. A support seat 2 surrounding the tower body 1 is arranged outside the tower body 1, which can provide a stable, uniform and reliable radial support force for the tower body 1, effectively avoiding the tilting of the tower body 1 due to special working conditions such as earthquakes, and then avoiding the leakage of the sealing part between the tower sections 11 caused by the tilt of the tower body 1, that is, further ensuring the stability of the sealed connection.

[0032] In this embodiment, the tower sections can be welded together using conventional welding connection methods. After the butt joints are welded, multiple nondestructive testing methods can be used to ensure the welding quality of all welds.

[0033] In this embodiment, Figure 1 and Figure 2 As shown, the support seat 2 is arranged at the floor 3 through which the tower body 1 passes, and each group of support components of the support seat 2 includes an installation unit, and the installation unit includes an embedded steel plate 21, a fixing seat 22, a connecting bolt 23 and a support member 24. The embedded steel plate 21 is embedded on the surface of the floor 3 where the support seat 2 is located, and the fixing seat 22 is fixedly connected to the embedded steel plate 21. One end of the support member 24 is connected to the fixing seat 22 through the connecting bolt 23, and the other end is provided with a curved surface adapted to the outer surface of the tower body 1, which is used to support the tower body 1. The support seat 2 is arranged on the surface of the floor 3 through which the tower passes, making full use of the structure of the components around the tower, simplifying the components required for fixing the support, and facilitating installation. The aforementioned curved surface refers to an arc surface consistent with the outer arc surface of the tower body 1, so that the end face of the support member 24 used for support can be closely fitted with the outer surface of the tower body 1 when an abnormal situation occurs, thereby providing a stable and reliable supporting force.

[0034] In this embodiment, each support assembly includes two sets of installation units, and the two sets of installation units are symmetrically arranged on the upper and lower surfaces of the floor 3 where the support base 2 is located. That is, they are arranged in two layers, and the embedded steel plates 21 of the two sets of installation units are respectively embedded on the upper and lower surfaces of the floor 3, which can not only provide more reliable support force for the tower, but also make the support reaction force fed back to the floor 3 more uniform, thereby improving safety.

[0035] In this embodiment, a gap of a set width exists between the end of the support member 24 that is provided with a curved surface that matches the outer surface of the tower body 1 and the tower body 1. A certain margin of gap is reserved between the support member 24 and the outer surface of the tower body 1 to absorb the thermal expansion of the tower body. The set width is selected according to the thermal expansion of the tower body 1 itself, and will not be described in detail here.

[0036] In this embodiment, a plurality of groups of support seats 2 are provided, and each group of support seats 2 is evenly distributed along the height direction of the tower body 1 and is arranged at the position of the floor 3 penetrated by the tower body 1. In this embodiment, according to the length of the tower body 1, one or more groups of lateral support seats 2 can be arranged along the vertical direction of the tower body 1, and each group of lateral support seats 2 is provided with 6 groups of support components arranged along the circumferential direction of the tower body 1. Specifically, in this embodiment, the height of the tower body 1 is about 40 meters, and multiple floors are penetrated along the height direction. Two layers of the floors penetrated by it are selected as the floors for setting the support seats 2, that is, in this embodiment, two groups of support seats 2 are provided in the height direction of the tower body 1. In other embodiments, the number of support seats 2 can be selected more or less according to the height of the tower body 1. According to mechanical seismic calculations, six groups of support components are provided for each group of support seats 2. In other embodiments, the number can also be selected according to the situation.

[0037] In this embodiment, at least one tower section 11 is provided with a manhole, which is sealed by a cover plate 8. The cover plate 8 and the edge of the manhole are connected by a flange 12, and the flange 12 is sealed by welding.

[0038] In this embodiment, Figure 5 As shown, a sight glass hole is provided on the cover plate 8, and a sight glass device 9 is provided at the sight glass hole for observing the internal operation of the tower body. The sight glass device 9 comprises a gland 91, a sight glass 92, a gasket 93 and a fixing member 94. The gland 91 is connected to the sight glass hole through the fixing member 94, and the sight glass 92 is sandwiched between the gland 91 and the edge of the sight glass hole, and the gasket 93 is padded between the sight glass 92 and the gland 91.

[0039] In this embodiment, the gland 91 and the gasket 93 are both annular structures, and the vacant area in the middle can be used to observe the internal situation through the sight glass 92. The fixing stage 94 uses nuts and screws to connect the gland 91 and the edge of the sight glass hole by fastening, so that the sight glass 92, the gasket 93 and the edge of the sight glass hole are pressed and fixed by the gland 91. This part of the sealing structure is a non-welded structure, but the gasket 93 is located on the outside of the sight glass 92 and is not in direct contact with the internal material. In order to solve the sealing problem, the high sealing performance of the tower can also be achieved by controlling the size of the sight glass and selecting the appropriate gasket type and material according to the specific working conditions.

[0040] In this embodiment, Figure 3 and Figure 4As shown, the flange 12 includes a welding lip 121 and a flange ring 122. The flange ring 122 is provided with a connection hole 123 that allows a fastener 124 to pass through. The welding lip 121 and the flange ring 122 both protrude radially from the outer surface of the component where they are located, and are arranged at the butt joint position of the component where they are located. Compared with the welding lip 121, the flange ring 122 is farther away from the butt joint surface, that is, in a set of flanges butted together, the flange rings 122 on both sides of the butt joint surface are located outside the welding lip 121 of the butt joint surface to avoid affecting the welding of the welding lip 121; and the connection hole 123 is farther away from the outer surface of the component where they are located than the top of the welding lip 121. This arrangement can avoid interference between the fastener 124 and the welding lip 121 when passing through the connection hole 123. After the adjacent components are butt jointed, the butt jointed welding lips 121 are connected by welding to achieve a sealed connection, and the corresponding flange rings 122 are connected by the fastener 124 to achieve further fixation. In this embodiment, the fastener 124 can be bolted and nut to achieve the connection of the flange ring 122.

[0041] In this embodiment, the flange 12 further includes a buffer pad 125, which is arranged between the butted weld lips 121. The buffer pad 125 does not have a sealing effect, and the sealing effect is achieved by the weld lips 121. The buffer pad 125 is mainly used to eliminate the processing error of the flange butt surface, and the buffer pad 125 can be made of 0.5 mm thick flexible graphite.

[0042] In this embodiment, the flange 12 is divided into a container flange for connecting to the tower section 11 and a manhole flange for connecting to the manhole cover plate 8 .

[0043] like Figure 3 As shown, the container flange includes an upper flange ring 122, bolts, a buffer pad 125 and a lower flange ring 122; a welding lip 121 is provided on the butt surface of the flange 12; according to the length of the tower body 1, considering the lifting and transportation requirements, the tower body 1 is divided into multiple sections, and the sections are assembled through the container flange; after the tower body 1 is finally assembled and fixed by the bolts, the welding lip is welded and sealed;

[0044] like Figure 4 As shown, the manhole flange includes a hole flange ring 122, a cover flange ring 122 and bolts; the hole flange ring 122 and the cover flange ring 122 are fixedly connected by bolts; a welding lip 121 is set on the butt surface of the flange 12; after the flange 12 is adjusted and butt-jointed and fixed by bolts, the welding lip 121 is welded and sealed.

[0045] In this embodiment, the high-sealing tower also includes a pipe 4, and an outlet 13 is provided at the top of the tower section 11 at the highest point of the tower body 1. The outlet 13 is connected to the inlet of the external condenser through the pipe 4, and the middle part of the pipe 4 is a retractable bellows 5 structure. The pipe 4 is used to connect the outlet 13 at the top of the tower and the condenser arranged on the upper floor. The bellows 5 is arranged in the middle of the pipe 4 to absorb the thermal expansion of the tower body 1. The tower internals 14 can be installed inside the tower body 1. The tower internals 14 generally include fillers, collectors, distributors, support rings and other components. They are conventional components inside the tower body 1 and are not described in detail here. The tower body 1 of this embodiment has a height of about 40 meters and can be divided into two tower sections along the height. In other implementations, more segments can also be divided depending on the height of the tower body 1 or the layout inside the tower.

[0046] In this embodiment, the high-seal tower also includes a skirt 6. The bottom of the tower section 11 at the lowest point of the tower body 1 is an arc-shaped structure, and the top of the skirt 6 is adapted to the arc-shaped structure. The skirt 6 is installed between the tower body 1 and the civil foundation, and is connected to the civil foundation through anchor bolts 61, thereby providing a stable and reliable connection base for the tower.

[0047] In this embodiment, the high-seal tower further includes a skirt template 7, which is a sheet-like structure and is cushioned between the skirt 6 and the civil engineering foundation. The skirt template 7 is provided with through holes for allowing the anchor bolts 61 to pass through. The skirt template 7 is an integral sheet-like structure, which can evenly distribute the weight of the entire tower on the civil engineering foundation below. In addition, the through holes on the skirt template 7 can also play a limiting positioning function, restricting the position and spacing of the anchor bolts 61.

[0048] The high-sealing tower of this embodiment is used in the field of heavy water distillation technology, and relates to providing a new type of high-sealing packed tower. The high-sealing tower can also be directly called a sealed tower, a sealed packed tower, or a distillation tower, wherein "high sealing" is not a specific indicator, but a common term for such sealed towers in the field of heavy water distillation.

[0049] In general, the tower of this embodiment can achieve a high sealing effect by adopting a welded lip plate structure. At the same time, this sealing has high reliability, good and stable sealing effect, and a simple and compact structure. It can solve the sealing problem of the tower when there is an external pipe connection and flange connection, and is convenient for the application and promotion of the tower in the nuclear power heavy water distillation industry. In addition to using a welding sealing method to improve the sealing performance, a lateral support seat 2 is also set around the tower body 1 along the vertical direction of the distillation tower to prevent the tower from tilting in the event of an earthquake or abnormal working conditions; the top outlet of the tower is connected to the condenser. Considering the thermal expansion, a pipe 4+bellows 5 connection method is adopted between the top of the tower and the bottom inlet of the condenser. The scalability of the bellows 5 can fully compensate for the dimensional change caused by thermal expansion; a skirt template 7 is set between the tower skirt 6 and the civil foundation to constrain the spacing of the anchor bolts for installation, and the weight of the tower can be evenly distributed on the civil foundation below.

[0050] Example 2

[0051] The heavy water distillation system of the present embodiment includes a condenser, a reboiler, a kettle vaporizer, a vacuum pump and a high-sealed tower in Example 1, and the high-sealed tower is connected to the condenser, the reboiler, the kettle vaporizer and the vacuum pump through pipelines. The system of the present embodiment can be applied to the water nuclear power heavy water distillation project for the distillation separation of tritium-containing heavy water. The condenser, reboiler, kettle vaporizer and vacuum pump used in the system can all adopt conventional equipment on the market, and their functions and connection relationships, working principles are all conventional contents in the field of this system, which will not be repeated here. A valve can also be set on the pipeline in the system, and the high-sealed tower is connected to other equipment by a pipeline, and the pipeline and the pipe of the high-sealed tower can be connected by welding (to ensure the sealing effect).

[0052] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A high-sealing tower, characterized in that: It comprises a tower body (1) and a support base (2). The tower body (1) is divided into a plurality of tower sections (11) along the height direction, two adjacent tower sections (11) are connected via flanges (12), and the butt surfaces of the flanges (12) are sealed by welding. The support seat (2) is arranged around the outer periphery of the tower body (1). The support base (2) comprises a plurality of groups of support components, and the support components of the support base (2) are evenly arranged around the vertical axis of the tower body (1) at the same height.

2. The high-sealing tower according to claim 1, characterized in that: The support base (2) is arranged at a floor slab (3) through which the tower body (1) passes. Each group of the support components of the support seat (2) comprises a mounting unit, and the mounting unit comprises a pre-buried steel plate (21), a fixing seat (22), a connecting bolt (23) and a support member (24). The embedded steel plate (21) is embedded on the surface of the floor slab (3) where the support seat (2) is located. The fixing seat (22) is fixedly connected to the embedded steel plate (21). One end of the support member (24) is connected to the fixing seat (22) via a connecting bolt (23), and the other end is provided with a curved surface adapted to the outer surface of the tower body (1) for supporting the tower body (1).

3. The high-sealing tower according to claim 2, characterized in that: Each group of the support components includes two groups of mounting units. The two groups of installation units are symmetrically arranged on the upper and lower surfaces of the floor slab (3) where the support base (2) is located.

4. The high-sealing tower according to claim 2, characterized in that: The support member (24) is provided with an end portion having a curved surface adapted to the outer surface of the tower body (1), and a gap of a set width exists between the end portion and the tower body (1).

5. The high-sealing tower according to any one of claims 1 to 4, characterized in that: The support seats (2) are provided in multiple groups, and each group of support seats (2) is evenly distributed along the height direction of the tower body (1).

6. The high-sealing tower according to claim 1, characterized in that: At least one tower section (11) is provided with a manhole, which is sealed by a cover plate (8). The cover plate (8) and the edge of the manhole are connected via a flange (12), and the butt joint surfaces of the flange (12) are sealed by welding.

7. The high-sealing tower according to claim 6, characterized in that: The cover plate (8) is provided with a mirror hole, and a mirror device (9) is provided at the mirror hole. The mirror device (9) comprises a gland (91), a mirror (92), a gasket (93) and a fixing member (94). The pressure cover (91) is connected to the sight glass hole through a fixing member (94), and the sight glass (92) is sandwiched between the pressure cover (91) and the edge of the sight glass hole. The gasket (93) is arranged between the sight glass (92) and the pressure cover (91).

8. The high-sealing tower according to claim 1 or 6, characterized in that: The flange (12) comprises a welding lip (121) and a flange ring (122), wherein the flange ring (122) is provided with a connecting hole (123) for allowing a fastener (124) to pass through. The welding lip (121) and the flange ring (122) both protrude radially from the outer surface of the component where they are located, and are arranged at the butt joint position of the component where they are located. Compared with the welding lip (121), the flange ring (122) is farther from the butt joint surface, and the connection hole (123) is farther from the outer surface of the component than the top of the welding lip (121). After the adjacent components are butted, the butted weld lips (121) are connected by welding to achieve a sealed connection, and the corresponding flange rings (122) are connected by fasteners (124) to achieve further fixation.

9. The high-sealing tower according to claim 8, characterized in that: The flange (12) further includes a buffer pad (125), The buffer pad (125) is arranged between the welding lips (121) that are butted against each other.

10. The high-sealing tower according to claim 1, characterized in that: Also includes taking over (4), An outlet (13) is provided at the top of the tower section (11) at the highest point of the tower body (1), and the outlet (13) is connected to the inlet of an external condenser through a pipe (4). The middle part of the connecting pipe (4) is a telescopic bellows (5) structure.

11. The high-sealing tower according to claim 1, characterized in that: It also includes a skirt seat (6), The bottom of the lowest tower section (11) of the tower body (1) is an arc-shaped structure. The top of the skirt (6) is adapted to the arc-shaped structure; the skirt (6) is installed between the tower body (1) and the civil foundation, and is connected to the civil foundation via anchor bolts (61).

12. The high-sealing tower according to claim 11, characterized in that: Also includes a skirt template (7), The skirt base template (7) is a sheet-like structure and is cushioned between the skirt base (6) and the civil engineering foundation. The skirt base template (7) is provided with through holes that allow anchor bolts (61) to pass through.

13. A heavy water distillation system, characterized in that: The invention comprises a condenser, a reboiler, a kettle vaporizer, a vacuum pump and a high-sealing tower as claimed in any one of claims 1 to 12, wherein the high-sealing tower is respectively connected to the condenser, the reboiler, the kettle vaporizer and the vacuum pump through pipelines.

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