Spherical tank

Abstract

According to the scheme, the spherical tank comprises a spherical tank body, and a manhole is formed in the bottom of the spherical tank body; the flange cover is arranged on the manhole and can seal the manhole, and a storage space used for containing materials is defined between the flange cover and the spherical tank body; the heat exchange tubes are arranged on the flange cover in a penetrating mode and stretch into the storage space, inlets and outlets of the heat exchange tubes are located outside the storage space, the flange cover is sealed on the manhole located in the bottom of the spherical tank body, the heat exchange tubes are arranged on the flange cover, installation of the heat exchange tubes is facilitated, high-temperature heat exchange media are introduced into openings of the heat exchange tubes, and the heat exchange tubes are not prone to falling off. The high-temperature heat exchange medium enters the part, located in the storage space, of the heat exchange pipe, can exchange heat with the material and then is discharged from an outlet of the heat exchange pipe, so that crystal precipitates at the bottom of the liquid material are directly heated, the physical and chemical characteristics of the liquid material are maintained, and it is guaranteed that the material stored in the spherical tank body can reach the needed working temperature and storage temperature. And meanwhile, the energy consumption is reduced.

Description

Technical Field

[0001] The present application relates to the field of spherical tanks, and in particular to a spherical tank. Background Art

[0002] A spherical tank is a spherical pressure tank, which is generally used to store gas, liquid and other material media. During the manufacturing and installation process of the spherical tank, for materials with high storage temperature requirements, the physical and chemical properties of the materials will change due to the low ambient temperature or storage temperature, such as crystallization from the liquid state. When storing such materials, it is usually necessary to lay insulation materials outside the spherical tank equipment, and install electric heating blocks on the outer surface of the spherical tank to ensure the temperature of the material stored inside. Installing electric heating blocks outside the spherical shell is costly and energy-consuming. At the same time, considering that the electric heating device is arranged inside the outer insulation layer of the spherical tank, there is a safety hazard of fire accidents. Summary of the invention

[0003] In order to solve the above problems, the present application provides a spherical tank.

[0004] According to one aspect of an embodiment of the present application, a spherical tank is disclosed, which includes a spherical tank body with a manhole at the bottom; a flange cover, which is arranged on the manhole and can close the manhole, and a storage space for accommodating materials is enclosed between the flange cover and the spherical tank body; at least one heat exchange tube, which is passed through the flange cover and extends into the storage space, and the inlet and outlet of the heat exchange tube are both located outside the storage space.

[0005] In an exemplary embodiment, at least one first through hole and at least one second through hole are provided on the flange cover; the heat exchange tube comprises a medium inlet section, a heat exchange section and a medium outlet section which are connected in sequence, the inlet of the heat exchange tube is located on the medium inlet section, the outlet of the heat exchange tube is located on the medium outlet section, the heat exchange section is located in the storage space, the medium inlet section passes through the first through hole from one end of the heat exchange section, and the medium outlet section passes through the second through hole from the other end of the heat exchange section.

[0006] In an exemplary embodiment, one end of the heat exchange section is connected to the medium inlet section in an arc shape, and the other end is connected to the medium outlet section in an arc shape; the shape of the heat exchange section is an arc; the medium inlet section and the medium outlet section are both perpendicular to the flange cover; flanges are provided on the inlet and outlet of the heat exchange tube.

[0007] In an exemplary embodiment, a valve is provided on at least one of the medium inlet section and the medium outlet section; the valve is located outside the spherical tank body; and the valve is provided on both the medium inlet section and the medium outlet section.

[0008] In an exemplary embodiment, a first thermal insulation layer is provided on a portion of the medium inlet section located outside the storage space; and a second thermal insulation layer is provided on a portion of the medium outlet section located outside the storage space.

[0009] In an exemplary embodiment, the first through hole and the second through hole are spaced apart; the flange cover is provided with first welding grooves at both axial ends corresponding to the first through hole, and the inner diameter of the first welding groove is larger than the inner diameter of the first through hole; the flange cover is provided with second welding grooves at both axial ends corresponding to the second through hole, and the inner diameter of the second welding groove is larger than the inner diameter of the second through hole.

[0010] In an exemplary embodiment, an inner diameter of the first welding groove gradually decreases toward a direction approaching the first through hole; and an inner diameter of the second welding groove gradually decreases toward a direction approaching the second through hole.

[0011] In an exemplary embodiment, the flange cover includes a cylinder and a cover, the top opening of the cylinder is sleeved on the manhole, the storage space is enclosed between the cylinder and the spherical tank body, the cover is detachably connected to the bottom edge of the cylinder, the cover is configured to cover or open the bottom opening of the cylinder, the heat exchange tube is passed through the cover; the medium inlet section and the medium outlet section are distributed in the center span of the cover.

[0012] In an exemplary embodiment, one side of the cover body is rotatably connected to the cylinder body, and the other side is connected to the bottom edge of the cylinder body by bolts; a handle is provided on the cover body, and the heat exchange tube is located between the handle and the rotatable connection position of the cover body; or the peripheral side of the cover body is connected to the bottom edge of the cylinder body by bolts; the heat exchange tube extends into the spherical tank body, and the heat exchange tube is located below the lowest liquid level of the spherical tank body.

[0013] In an exemplary embodiment, the spherical tank also includes a first connecting pipe, a delivery pump, a heat source device and a second connecting pipe, the heat source device is used to heat the heat exchange medium, one end of the first connecting pipe is connected to the inlet of the heat exchange pipe, the other end of the first connecting pipe is connected to the first end of the delivery pump, the second end of the delivery pump is connected to the heat exchange medium outlet of the heat source device, one end of the second connecting pipe is connected to the outlet of the heat exchange pipe, and the other end of the second connecting pipe is connected to the heat exchange medium inlet of the heat source device.

[0014] The technical solution provided by the embodiments of the present application includes at least the following beneficial effects:

[0015] The spherical tank disclosed in the present application is provided with a flange cover on the spherical tank body, and the space enclosed by the inner cavity of the spherical tank body and the flange cover at the manhole is used as the storage space. The storage space is used to accommodate materials. When the temperature of the liquid material stored inside the storage space decreases, the liquid material is easy to crystallize and form a bottom precipitate. The flange cover of the present application is closed on the manhole located at the bottom of the spherical tank body, and the heat exchange tube is arranged on the flange cover, which is convenient for the installation of the heat exchange tube. A high-temperature heat exchange medium is introduced into the opening of the heat exchange tube, and the high-temperature heat exchange medium enters the part of the heat exchange tube located in the storage space, can exchange heat with the material and be discharged from the outlet of the heat exchange tube, so as to directly heat the crystallized precipitate at the bottom of the liquid material, maintain the physical and chemical properties of the liquid material, ensure that the stored material in the spherical tank body can reach the required working temperature and storage temperature, reduce production costs, and reduce energy consumption.

[0016] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the description, are used to explain the principles of the present application.

[0018] Figure 1 A schematic diagram of the composition of a spherical tank provided in an embodiment;

[0019] Figure 2 A front view of the structure of a flange cover and a heat exchange tube provided in an embodiment;

[0020] Figure 3 A structural diagram of a heat exchange tube provided in an embodiment;

[0021] Figure 4 A top view of the structure of a flange cover and a heat exchange tube provided in an embodiment;

[0022] Figure 5 A cross-sectional view of a flange cover provided in an embodiment along the axial direction of a first through hole or a second through hole.

[0023] Figure markings: 100-spherical tank body, 110-flange cover, 120-heat exchange tube, 130-bracket, 211-cylinder, 212-cover, 213-rotating shaft, 221-inlet, 222-outlet, 231-first through hole, 232-second through hole, 240-valve, 250-flange, 310-medium inlet section, 320-heat exchange section, 330-medium outlet section, 410-first welding groove, 510-handle. DETAILED DESCRIPTION

[0024] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of this application will be more comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art.

[0025] In the description of the present invention, all the connection relationships mentioned do not refer to the direct connection of components, but refer to the fact that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the present invention can be combined interchangeably without conflicting with each other.

[0026] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, “several” means one or more, “more” means more than two, “greater than”, “less than”, “exceed”, etc. are understood as not including the number itself, and “above”, “below”, “within”, etc. are understood as including the number itself.

[0029] The present application provides a spherical tank, which adopts a method of passing a heat exchange tube 120 through a flange cover 110 at the bottom to achieve heating of the material stored in the spherical tank, maintain the physical and chemical properties of the stored material, facilitate installation and replacement, reduce production costs, and reduce energy consumption.

[0030] Reference Figure 1 and Figure 2 The spherical tank provided by the present application includes a spherical tank body 100, a flange cover 110 and at least one heat exchange tube 120. A manhole is provided at the bottom of the spherical tank body 100. The flange cover 110 is arranged on the manhole and can close the manhole. A storage space for accommodating materials is formed between the flange cover 110 and the inner cavity of the spherical tank body 100. If liquid materials are placed in the storage space, when the temperature decreases, the liquid materials are easy to crystallize and settle to the bottom of the storage space. The heat exchange tube 120 is arranged on the flange cover 110, and the heat exchange tube 120 extends into the storage space. At the same time, the inlet 221 and the outlet 222 of the heat exchange tube 120 both extend out of the storage space.

[0031] The spherical tank of the present application arranges the heat exchange tube 120 on the flange cover 110 located at the bottom, and the inlet 221 and the outlet 222 of the heat exchange tube 120 are extended outside the storage space, which is convenient for the installation or replacement of the heat exchange tube 120, and also convenient for the staff to introduce high-temperature heat exchange medium into the opening of the heat exchange tube 120. The high-temperature heat exchange medium exchanges heat with the material in the storage space through the heat exchange tube 120, and is finally discharged from the outlet 222 of the heat exchange tube 120 to directly heat the crystal precipitation at the bottom of the storage space, thereby maintaining the physical and chemical properties of the liquid material, ensuring that the stored material in the spherical tank body 100 can reach the required working temperature and storage temperature, reducing production costs, and reducing energy consumption.

[0032] The spherical tank body 100 is a pressure tank with a spherical appearance. The storage space can actually store materials in liquid or gas state. The spherical tank body 100 is provided with a bracket 130 on the outer peripheral wall in the horizontal direction to ensure the stability of the spherical tank body 100. The flange cover 110 is arranged at the bottom of the spherical tank body 100 so that the heat exchange tube 120 can accurately heat the material with changing physical and chemical properties. The size of the manhole opened at the bottom of the spherical tank body 100 is adapted to the size of the flange cover 110 so that the flange cover 110 can close the manhole. In fact, the heat exchange tube 120 is fixed on the flange cover 110 to form a whole. The flange cover 110 can be detachably connected to the spherical tank body 100 by bolts. When the heat exchange tube 120 needs to be replaced, part of the flange cover 110 can be directly disassembled and replaced with a flange cover 110 with the heat exchange tube 120, which is convenient for replacement and installation operations. A manhole is also provided on the top of the spherical tank body 100 for easy installation and maintenance. In fact, a temperature sensor is provided inside the spherical tank body 100, so that the staff can monitor the temperature of the materials in the storage space in real time, and then can timely introduce the heat exchange medium of suitable temperature into the heat exchange tube 120.

[0033] Combination Figure 2As shown, the flange cover 110 is provided with a first through hole 231 and a second through hole 232, and the heat exchange tube 120 is provided with a first through hole 231, and the heat exchange tube 120 passes through the first through hole 231 and passes through the second through hole 232. Further, the flange cover 110 is provided with a first welding groove 410 at both axial ends corresponding to the first through hole 231, the inner diameter of the first welding groove 410 is larger than the inner diameter of the first through hole 231, and the inner diameter of the first welding groove 410 gradually decreases toward the direction close to the first through hole 231, presenting an inward contraction structure. The staff can fill the solder into the first welding groove 410 to reduce the weld nodules. The flange cover 110 is provided with a second welding groove at both axial ends corresponding to the second through hole 232, the inner diameter of the second welding groove is larger than the inner diameter of the second through hole 232, and the inner diameter of the second welding groove gradually decreases toward the direction close to the second through hole 232, presenting an inward contraction structure. The staff can fill the solder into the second welding groove to reduce the weld nodules. The first welding groove 410 and the second welding groove are provided to facilitate welding of the heat exchange tube to the flange cover 100 , thereby fixing the heat exchange tube 120 and the flange cover 100 to each other to form a whole.

[0034] Moreover, the flange cover 110 includes a cylinder 211 and a cover 212. The cylinder 211 extends axially in the up-down direction, and a storage space is formed between the space enclosed inside the cylinder 211 and the inner cavity of the spherical tank body 100. The cylinder 211 has a top opening and a bottom opening, and the top end of the cylinder can be fixed to the spherical tank body 100 by welding. The cylinder 211 can also be detachably connected to the spherical tank body 100 by bolts, etc., and the top opening of the cylinder 211 is connected to the manhole.

[0035] The cover 212 is detachably connected to the bottom edge of the cylinder 211, and the cover 212 can cover or open the bottom opening of the cylinder 211, and then open or close the manhole, which is convenient for the staff to inspect the spherical tank body 100. At the same time, the cover 212 can be removed from the cylinder 211, which is convenient for the overall replacement of the cover 212 and the heat exchange tube 120.

[0036] In this embodiment, one side of the cover 212 is rotatably connected to the cylinder 211 via the rotating shaft 213, and the other side of the cover 212 is connected to the bottom edge of the cylinder 211 via bolts, so as to facilitate opening of the cover 212. In addition, in some other embodiments, the peripheral side of the cover 212 can be connected to the bottom edge of the cylinder 211 via bolts, and when the bottom end opening of the cylinder 211 needs to be opened, the bolts on the cover 212 can be removed.

[0037] The heat exchange tube 120 is installed on the cover 212, and the inlet 221 and outlet 222 of the heat exchange tube 120 are installed outside the cover 212 and outside the storage space. The heat exchange tube 120 is installed at the bottom of the entire flange cover 110, which is convenient for introducing high-temperature heat exchange medium into the heat exchange tube 120, and at the same time ensures that the heat exchange tube 120 can heat the liquid material at the bottom of the storage space, and further maintain the physical and chemical properties of the liquid material. In fact, the inlet 221 and outlet 222 of the heat exchange tube 120 can also pass through the cover 212 or the cylinder 211 at will.

[0038] Combination Figure 5 A handle 510 is provided on the cover body 212, and the heat exchange tube 120 is located between the rotation connection position of the handle 510 and the cover body 212. The position of the heat exchange tube 120 is staggered with the rotating shaft 213 and the handle 510 to avoid interference and facilitate use by the staff. Correspondingly, if it is necessary to open the cover body 212 after installing the heat exchange tube 120, the heat exchange tube 120 can be limited to be set in the cylinder 211, so that the heat exchange tube 120 can be turned over with the cover body 212 to open the cylinder 211 to avoid interference.

[0039] Moreover, the heat exchange tube 120 can be positioned to extend into the interior of the spherical tank body 100, thereby increasing the heat exchange area and heating effect of the heat exchange tube 120 on the material in the storage space. Furthermore, the heat exchange tube 120 is located below the lowest liquid level of the spherical tank body 100, ensuring that the heat exchange tube 120 is always located below the liquid surface of the liquid material, thereby increasing the heat exchange efficiency.

[0040] In addition, two or more heat exchange tubes 120 may be provided, and the two or more heat exchange tubes 120 may be arranged side by side or staggered, for example, two heat exchange tubes 120 may be arranged in parallel, or two heat exchange tubes 120 may be arranged cross-staggered, and correspondingly, the number of the first through holes 231 and the number of the second through holes 232 may match the number of the heat exchange tubes 120 one by one.

[0041] In order to facilitate the connection of external heat exchange medium circulation pipelines, flanges 250 are provided on the inlet 221 of the heat exchange tube 120 and the outlet 222 of the heat exchange tube 120. The pipelines are connected to the flanges 250 by screws to achieve sealing and fixation. The flanges 250 can be fixed to the heat exchange tube 120 by welding or other methods.

[0042] Combination Figure 2 and Figure 3In this embodiment, the heat exchange tube 120 is a U-shaped structure with the opening facing downward. The heat exchange tube 120 includes a medium inlet section 310, a heat exchange section 320 and a medium outlet section 330 that are connected at one time. The inlet 221 of the heat exchange section 320 is formed at the medium inlet section 310, and the outlet 222 of the heat exchange section 320 is formed at the medium outlet section 330. The medium inlet section 310 vertically passes through the first through hole 231 from the storage space, and the medium outlet section 330 vertically passes through the second through hole 232 from the storage space. The U-shaped heat exchange tube 120 can simultaneously pass the inlet 221 and the outlet 222 into the first through hole 231 and the second through hole 232 respectively, so that the heat exchange tube 120 is conveniently installed in alignment with the hole position on the cover body 212 through the medium inlet section 310 and the medium outlet section 330. The lengths of the medium inlet section 310 and the medium outlet section 330 of the present application are consistent. The heat exchange tube 120 can also be used as a standard part. Moreover, the heat exchange section 320 is in an arc shape, and the two ends of the heat exchange tube 120 are respectively connected to the medium inlet section 310 and the medium outlet section 330 in an arc shape, which can increase the heat exchange area between the heat exchange tube 120 and the stored material, improve the heat exchange efficiency, and reduce the impact of the heat exchange medium on the heat exchange tube 120.

[0043] In addition, the medium inlet section 310 and the medium outlet section 330 can also be arranged obliquely relative to the flange cover 110, and the heat exchange section 320 can be extended in a straight line, or extended in a spiral structure, or arranged in a coil structure, etc., to increase the heat exchange area. Generally speaking, the overall width of the heat exchange tube 120 needs to be smaller than the width of the flange cover 110. The overall width of the heat exchange tube 120 of the present application needs to be smaller than the width of the cover body 212, so that the cover body 212 can be smoothly installed on the cylinder 211, or the cover body 212 can be smoothly removed from the cylinder 211 to avoid interference. The material of the heat exchange tube 120 can be selected as stainless steel or carbon steel according to the characteristics of the material medium stored in the spherical tank.

[0044] Furthermore, the outer walls of the medium inlet section 310 and the medium outlet section 320 that are exposed outside the storage space are coated with a thermal insulation coating, which can provide thermal insulation for the heat exchange medium and improve the heat exchange efficiency with the stored materials.

[0045] Reference Figure 2 and Figure 4The first through hole 231 and the second through hole 232 are provided on the cover 212, and the inner diameter of the first through hole 231 matches the inner diameter of the medium inlet section 310, so that the medium outlet section 330 can pass through and be welded to the first through hole 231. The inner diameter of the second through hole 232 matches the inner diameter of the medium outlet section 330, so that the medium outlet section 330 can pass through and be welded to the second through hole 232. In addition, the first through hole 231 and the second through hole 232 are arranged at intervals, so that the medium inlet section 310 and the medium outlet section 330 are spaced apart, forming a supporting effect, so that the heat exchange tube 120 can be more stably connected to the flange cover 110. In addition, the first through hole 231 and the second through hole 232 can also be arranged on the cylinder 211, so that the medium inlet section 310 and the medium outlet section 330 can be welded to the cylinder 211.

[0046] Furthermore, two valves 240 are provided on the heat exchange tube 120, and the two valves 240 are respectively arranged on the medium inlet section 310 and the medium outlet section 330, and the valve 240 is located outside the storage space, which is convenient for the staff to open or close the valve 240 to open or close the pipeline. The valve 240 of the present application can be a stop valve, and one of the two valves 240 can be used as a spare to increase the service life. In addition, after the high-temperature heat exchange medium is introduced into the heat exchange tube 120, the two valves 240 can also be locked to keep the high-temperature heat exchange medium stored in the heat exchange tube 120 for heat exchange. Further, the spherical tank of the present application also includes a first connecting pipe, a delivery pump, a heat source device and a second connecting pipe. The heat source device is used to heat the heat exchange medium. One end of the first connecting pipe is connected to the inlet 221 of the heat exchange pipe 120, and the other end of the first connecting pipe is connected to the first end of the delivery pump. The second end of the delivery pump is connected to the heat exchange medium outlet of the heat source device. One end of the second connecting pipe is connected to the outlet 222 of the heat exchange pipe 120, and the other end of the second connecting pipe is connected to the heat exchange medium inlet 221 of the heat source device. When in use, the two valves 240 are opened, and the heat exchange medium heated by the heat source device flows through the heat exchange pipe 120 under the pumping action of the delivery pump to exchange heat with the stored material. After heat exchange, it flows back to the heat source device through the second connecting pipe, forming a continuous heating and recycling of the high-temperature heat exchange medium, which can more stably maintain the temperature of the material inside the storage space. In this embodiment, the heat source device can be a pipeline structure with an electric heating element and a heat exchange device on the outside, or a storage tank with an electric heating element on the inside, etc. The heat exchange medium can be hot water, or other liquid media with different freezing points and boiling points, corresponding to the temperature required for the storage material.

[0047] In addition, valve 240 can also be a solenoid valve, which can open or close the heat exchange tube 120 by electronic control, which is convenient and quick. The spherical tank can also include a controller, which is electrically connected to the temperature sensor, valve 240 and the heat source device. When the temperature of the stored material decreases, the valve 240 and the heat source device can be automatically opened to transport high-temperature heat exchange medium to the heat exchange tube 120. When the temperature of the stored material reaches the required temperature, the heat exchange medium in the heat exchange tube 120 is discharged and the valve 240 is closed.

[0048] Reference Figure 5 The medium inlet section 310 and the medium outlet section 330 are symmetrically distributed with the central axis of the cover body 212 as the center, so as to improve the heating uniformity of the stored materials in the spherical tank. In this embodiment, the spacing distribution direction of the medium inlet section 310 and the medium outlet section 330 is parallel to the extension direction of the rotating shaft 213. The handle 510 and the rotating shaft 213 are located on both sides of the center of the cover body 212, and the heat exchange tube 120 is located between the handle 510 and the rotating shaft 213 to reduce interference. In addition, the spacing distribution direction of the medium inlet section 310 and the medium outlet section 330 can also be perpendicular to or staggered from the extension direction of the rotating shaft 213.

[0049] Correspondingly, the steps of the spherical tank installation method are as follows: a first through hole 231 and a second through hole 232 are opened on the cover body 212 at intervals; the medium inlet section 310 is inserted into the first through hole 231 and welded to the cover body 212; the medium outlet section 330 is welded to the second through hole 232 on the cover body 212; the cover body 212 is installed on the cylinder 211; the cylinder 211 is installed on the bottom manhole of the spherical tank body 100, and the heat exchange section 320 of the heat exchange tube 120 is partially set in the storage space; the welding points of the spherical tank body 100, the heat exchange tube 120 and the flip cover are inspected for weld defects, wherein the weld defect inspection includes sequentially performing radiographic inspection, ultrasonic inspection re-inspection and magnetic particle inspection, and the detected weld defects are inspected. The defects are repaired by welding or removed by grinding until the inspection result of the weld defects is qualified; the welding points of the spherical tank body 100, the heat exchange tube 120 and the flip cover are subjected to a water pressure test, and the detected pressure leakage points are repaired by welding or removed by grinding until the inspection result of the water pressure test is qualified; the valve 240 is installed at the part where the medium inlet section 310 and the medium outlet section 330 pass through the storage space, and the flange 250 is welded at the inlet 221 and the outlet 222 of the heat exchange tube 120. By welding the heat exchange tube 120 to the cover body 212 in advance, the heat exchange tube 120 can be installed or removed along with the installation or removal of the cover body 212, and then installed on or removed from the spherical tank body, which is convenient for the installation and replacement of the heat exchange tube 120.

[0050] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A spherical tank, characterized in that: include: The spherical tank body has a manhole at the bottom; A flange cover is arranged on the manhole and can close the manhole, and a storage space for accommodating materials is formed between the flange cover and the spherical tank body; At least one heat exchange tube is disposed on the flange cover and extends into the storage space, and an inlet and an outlet of the heat exchange tube are both located outside the storage space.

2. The spherical tank according to claim 1, characterized in that: The flange cover is provided with at least one first through hole and at least one second through hole; The heat exchange tube comprises a medium inlet section, a heat exchange section and a medium outlet section which are connected in sequence, the inlet of the heat exchange tube is located on the medium inlet section, the outlet of the heat exchange tube is located on the medium outlet section, the heat exchange section is located in the storage space, the medium inlet section passes through the first through hole from one end of the heat exchange section, and the medium outlet section passes through the second through hole from the other end of the heat exchange section.

3. The spherical tank according to claim 2, characterized in that: One end of the heat exchange section is connected to the medium inlet section in an arc shape, and the other end is connected to the medium outlet section in an arc shape; The shape of the heat exchange section is arc-shaped; The medium inlet section and the medium outlet section are both perpendicular to the flange cover; Flanges are provided on the inlet and outlet of the heat exchange tube.

4. The spherical tank according to claim 2, characterized in that: A valve is provided on at least one of the medium inlet section and the medium outlet section; The valve is located outside the spherical tank body; The valve is provided on both the medium inlet section and the medium outlet section.

5. The spherical tank according to claim 2, characterized in that: A first heat-insulating layer is provided on the portion of the medium inlet section located outside the storage space; A second heat-insulating layer is provided on the portion of the medium outlet section located outside the storage space.

6. The spherical tank according to claim 2, characterized in that: The first through hole and the second through hole are arranged at intervals; The flange cover is provided with first welding grooves at two axial ends corresponding to the first through hole, and the inner diameter of the first welding groove is larger than the inner diameter of the first through hole; The flange cover is provided with second welding grooves at two axial ends corresponding to the second through hole, and the inner diameter of the second welding groove is larger than the inner diameter of the second through hole.

7. The spherical tank according to claim 6, characterized in that: The inner diameter of the first welding groove gradually decreases toward the first through hole; The inner diameter of the second welding groove gradually decreases toward the second through hole.

8. The spherical tank according to claim 2 or 3, characterized in that: The flange cover comprises a cylinder and a cover, the top opening of the cylinder is sleeved on the manhole, the cylinder and the spherical tank body form the storage space, the cover is detachably connected to the bottom edge of the cylinder, the cover is configured to cover or open the bottom opening of the cylinder, and the heat exchange tube is passed through the cover; The medium inlet section and the medium outlet section are distributed in the center span of the cover body.

9. The spherical tank according to claim 8, characterized in that: One side of the cover is rotatably connected to the cylinder, and the other side is connected to the bottom edge of the cylinder by bolts; a handle is provided on the cover, and the heat exchange tube is located between the handle and the rotatable connection position of the cover; or The peripheral side of the cover body is connected to the bottom edge of the cylinder body by bolts; the heat exchange tube extends into the spherical tank body, and the heat exchange tube is located below the lowest liquid level of the spherical tank body.

10. The spherical tank according to claim 1, characterized in that: The spherical tank also includes a first connecting pipe, a delivery pump, a heat source device and a second connecting pipe. The heat source device is used to heat the heat exchange medium. One end of the first connecting pipe is connected to the inlet of the heat exchange pipe, the other end of the first connecting pipe is connected to the first end of the delivery pump, the second end of the delivery pump is connected to the heat exchange medium outlet of the heat source device, one end of the second connecting pipe is connected to the outlet of the heat exchange pipe, and the other end of the second connecting pipe is connected to the heat exchange medium inlet of the heat source device.

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