Fused salt storage tank feeding distribution system

Abstract

The utility model provides a fused salt storage tank feed distribution system which comprises a flow guide pipeline, a distribution ring pipe, a guide support, a sliding support and a limiting support, the flow guide pipeline is of a multi-section structure, the distribution ring pipe is located at the bottom of a storage tank, the flow guide pipeline enters from the top of the storage tank and extends to the distribution ring pipe to be communicated with the distribution ring pipe, and a plurality of throttling through holes are formed in the distribution ring pipe. The guide bracket is fixed on a wall plate of the storage tank, one vertical pipe in the flow guide pipeline penetrates through a rectangular channel of the guide bracket and is provided with a movable displacement interval, the upper part of the sliding support is fixedly connected with the support flow guide, and the lower part of the sliding support is in sliding contact with a bottom plate of the storage tank; the lower portion of the supporting body is in sliding contact with the storage tank bottom plate, the limiting body is fixed to the storage tank bottom plate and located on the periphery of the supporting body, and the supporting body moves within the range of the limiting body. The device has the beneficial effects of having a certain displacement activity interval, adapting to expansive displacement of thermal stress of a pipeline system, and enhancing the connection reliability of the pipeline and the tank body.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vertical cylindrical molten salt storage tanks with a volume of more than 1000 cubic meters and a temperature of more than 200 DEG C, which store liquid media, and in particular to a feed distribution system for a molten salt storage tank. BACKGROUND

[0002] Molten salt energy storage technology plays an increasingly key role in many fields such as power systems and industrial energy management. Among various energy storage technologies, energy storage systems based on molten salt energy storage media have received widespread attention due to their high energy density, long-term stable energy storage, and relatively mature technical foundation.

[0003] As one of the key core devices of high-temperature energy storage systems, the performance of a molten salt storage tank directly affects key indicators such as the energy storage efficiency, safety, and service life of the entire energy storage system. During the operation of a molten salt storage tank, the feed distribution is a crucial technical link.

[0004] During the operation of a molten salt storage tank, heat is dissipated to the outside, resulting in uneven temperature and concentration of the internal molten salt, which reduces the overall energy storage efficiency of the energy storage system. If the medium temperature difference between different regions is large, it can cause excessive local thermal stress of the storage tank structure, affecting the service life and safety of the storage tank.

[0005] During the operation of a molten salt storage tank, thermal displacement occurs due to thermal expansion. Since the feed distribution system is connected to the external piping, the thermal expansion displacement of the external piping is transmitted to the feed distribution system, resulting in inconsistent thermal displacement between the feed distribution system and the storage tank. This increases the local stress at the connection between the distribution system and the storage tank, which can damage the storage tank structure and affect the service life and safety of the storage tank. CONTENT OF THE INVENTION

[0006] The present application aims to provide a feed distribution system for a molten salt storage tank. The following solutions are proposed:

[0007] The molten salt storage tank feed distribution system comprises a flow guide pipe, a distribution ring pipe, a guide support, a sliding support and a limiting support, the flow guide pipe is a multi-section structure, each section is connected with the adjacent section through an elbow, the distribution ring pipe is located at the bottom of the storage tank, the flow guide pipe enters from the top of the storage tank, extends to the distribution ring pipe and is connected with the distribution ring pipe at the end, a plurality of throttling through holes are formed in the distribution ring pipe, the guide support is fixed on the wall plate of the storage tank, the guide support comprises a rectangular channel, one of the vertical pipes in the flow guide pipe passes through the rectangular channel, and the vertical pipe and the rectangular channel have a spacing movement distance, the sliding support is used for supporting the flow guide pipe, the upper part of the sliding support is fixedly connected with the flow guide pipe, and the lower part of the sliding support is in sliding contact with the bottom plate of the storage tank, the limiting support is used for supporting the distribution ring pipe and comprises a support body and a limiting body, the upper part of the support body is fixedly connected with the distribution ring pipe, the lower part of the support body is in sliding contact with the bottom plate of the storage tank, and the limiting body is fixed to the bottom plate of the storage tank and located at the periphery of the support body, the support body has a displacement amount in the range of the limiting body.

[0008] The flow guide pipe comprises a vertical falling section and a horizontal flow section, the inclination angle of each pipe of the horizontal flow section is arranged to be 2°-5°, and the vertical falling section and the horizontal flow section are both formed into a Z-shaped arrangement by a plurality of pipes and elbows, the middle pipe of the Z-shaped arrangement of the vertical falling section is arranged at an angle of 10°-45° with the horizontal plane, and each pipe of the Z-shaped arrangement of the horizontal flow section is arranged at an angle of 2°-5° with the horizontal plane.

[0009] The distribution ring pipe is composed of straight pipes and 45° elbows and is arranged in an octagonal shape horizontally, and the center of the distribution ring pipe coincides with the rotation axis of the wall plate of the storage tank.

[0010] The guide support is composed of a longitudinal support, a transverse support, an inclined support I, a gasket and an inclined support II, the side surface of the longitudinal support is fixedly connected with the inclined support I in the same plane, the bottom surface of the longitudinal support is fixedly connected with the inclined support II in the same vertical plane, and the longitudinal support and the inclined support II are fixedly connected with the wall plate of the storage tank through the gasket respectively, the rectangular channel is formed by the longitudinal support and the transverse support, and the long-axis of the rectangular channel is directed towards the central axis of the storage tank.

[0011] Preferably, the inner side surface of the longitudinal support is spaced apart from the outer wall surface of the vertical pipe passing through the rectangular channel by not more than 10 mm, so as to limit the transverse displacement of the vertical pipe, and the inner side surface of the transverse support is spaced apart from the outer wall surface of the vertical pipe passing through the rectangular channel by not more than 100 mm, so as to limit the movement of the vertical pipe within a range of 200 mm in the radial direction of the storage tank.

[0012] The axis of the throttling through hole is deflected outward by 5°-10°.

[0013] The sliding support is vertically arranged and comprises a sliding bottom plate I, a support pipe I and an arc-shaped gasket I, the lower end of the support pipe I is fixedly connected with the upper surface of the sliding bottom plate I, and the upper end of the support pipe I is fixedly connected with the lower surface of the arc-shaped gasket I, the upper surface of the arc-shaped gasket I is fixedly connected with the horizontal flow section, and the lower surface of the sliding bottom plate I is in sliding contact with the bottom plate of the storage tank.

[0014] The support body of the limiting support comprises a sliding bottom plate II, a support pipe II and an arc-shaped cushion plate II, the limiting body is a limiting block, the lower end of the support pipe II is fixedly connected with the upper surface of the sliding bottom plate II, and the upper end is fixedly connected with the lower surface of the arc-shaped cushion plate II; the upper surface of the arc-shaped cushion plate II is fixedly connected with the straight pipe of the distribution ring pipe; the lower surface of the sliding bottom plate II is in sliding contact with the tank bottom plate, and the limiting block is fixedly connected with the tank bottom plate.

[0015] The straight pipe of the distribution ring pipe is provided with a straight pipe of the distribution ring pipe.

[0016] The beneficial effects of the utility model are: the problem of excessive thermal stress of the distribution system caused by the thermal expansion of the pipeline system is solved, the thermal stress is released, the problem of excessive thermal stress caused by the inconsistent thermal expansion of the tank and the pipeline is solved, the strength and stability of the pipeline system and the reliability of the connection between the pipeline and the tank are effectively enhanced, the size and direction of the throttling through hole are reasonably set, the material outflow speed and flow direction can be controlled, the internal liquid of the tank is fully stirred, and the temperature distribution of the stored material is uniform. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall structure schematic view of the utility model;

[0018] Figure 2 It is the distribution ring pipe exhaust port anti-impact angle steel structure schematic view;

[0019] Figure 3 It is the guide support structure schematic view;

[0020] Figure 4 It is the A-A view of Figure 3

[0021] Figure 5 It is the sliding support structure schematic view;

[0022] Figure 6 It is the limiting support structure schematic view. DETAILED DESCRIPTION

[0023] The technical scheme of the utility model will be further explained in detail in combination with the drawings, so that the person skilled in the art can refer to the description and can be implemented.

[0024] The utility model provides a kind of feed distribution system of molten salt tank, mainly including guide pipe, distribution ring pipe, guide support, sliding support, limiting support.

[0025] As Figure 1 ​As shown in the drawings, the flow guide pipe mainly consists of straight pipe I 1, elbow I 2, straight pipe II 3, straight pipe III 4, elbow II 5, straight pipe IV 6, elbow III 7, straight pipe V 8, straight pipe VI 9, straight pipe VII 10, three-way pipe 11.

[0026] As shown in the drawings, Figure 1 The straight pipe I 1 is introduced vertically downward from the top of the storage tank, is fixedly connected with the straight pipe II 3 through the elbow I 2, and a circular hole 30 with a diameter not less than 20 mm is arranged on the pipe wall of the straight pipe I 1 and faces the center of the storage tank for discharging gas in the pipeline. The straight pipe II 3 is arranged at an angle of 10°~45° with the horizontal plane, is fixedly connected with the straight pipe III 4 through the elbow I 2, and the above elements jointly form a “Z” type vertical falling section which plays a buffering role for the falling liquid and can also increase the flexibility of the piping system and reduce the thermal stress of the pipeline itself.

[0027] As shown in the drawings, Figure 1 The straight pipe II 3 is connected with the elbow II 5 to turn to approximately the horizontal plane and is fixedly connected with the straight pipe IV 6, and then is fixedly connected with the elbow III 7, the straight pipe V 8, the straight pipe VI 9 and the straight pipe VII 10 in sequence to jointly form a “Z” type advection section. The straight pipe IV 6, the straight pipe V 8 and the straight pipe VI 9 are arranged at an angle of 2°~5° with the horizontal plane to avoid liquid accumulation in the pipe section. The “Z” type structure can increase the flexibility of the piping system and reduce the thermal stress of the pipeline itself.

[0028] As shown in the drawings, Figure 1 , 2 The distribution ring pipe mainly consists of the straight pipe VIII 12, the elbow IV 13, the throttling through hole 14, the exhaust port 15 and the anti-impact angle steel 16. The straight pipe VI 9 is fixedly connected with the straight pipe VII 10, and then is connected with the distribution ring pipe through the three-way pipe 11. The straight pipe VIII 12 and the elbow IV 13 are connected one by one to form an octagonal ring structure. The diameter of the circumscribed circle of the octagon is determined according to the diameter of the different storage tanks. The throttling through holes 14 are uniformly arranged on the top of the cross section of the straight pipe VIII 12. The number and diameter of the throttling through holes are determined according to the actual flow. The axis of the throttling through hole is deflected outward by 5°~10°, so that the molten salt is obliquely sprayed to drive the molten salt in the tank to form a vortex to achieve the effect of temperature mixing.

[0029] As shown in the drawings, Figure 2 The bottom of the cross section of the straight pipe VIII 12 is provided with one exhaust port 15 to prevent liquid accumulation in the ring pipe. The anti-impact angle steel 16 is arranged at the exhaust port to prevent the molten salt from flowing out to erode the bottom plate of the storage tank. The anti-impact angle steel faces the center of the distribution ring pipe.

[0030] As shown in the drawings, Figure 3 , 4As shown, the guide bracket is horizontally arranged perpendicular to the tank wall and mainly consists of a longitudinal support 17, a transverse support 18, an oblique support I 19, a pad 20, and an oblique support II 21. The side of the longitudinal support 17 is fixed to the same plane as the oblique support I 19, and the bottom surface of the longitudinal support 17 is fixed to the same vertical plane as the oblique support II 21. Both are fixed to the tank wall via pads, which reinforce the tank wall. The oblique supports I 19 and II 21 reinforce the longitudinal support 17. The longitudinal support 17 and the transverse support 18 are fixed to form a rectangular channel, through which the vertical pipe section passes vertically. The long side axis of the rectangular channel faces the central axis of the tank. The distance between the inner side of the longitudinal support 17 and the outer wall of the straight pipe III 4 is no more than 10mm, restricting the transverse displacement of the straight pipe III 4. The distance between the inner side of the transverse support 18 and the outer wall of the straight pipe III 4 is no more than 100mm, restricting the transverse displacement of the straight pipe III 4. 4. Move within a 200mm radius of the storage tank; the rectangular channel guides the vertical pipe section, allowing it to move freely along the axis.

[0031] like Figure 5 As shown, the sliding support is vertically installed perpendicular to the tank bottom plate and mainly consists of a sliding base plate I 22, a support pipe I 23, and an arc-shaped pad I 24. The lower surface of the sliding base plate I 22 is not fixed to the tank bottom plate, forming a sliding contact. The upper surface is fixed to the lower end of the support pipe I 23, the upper end of the support pipe I 23 is fixed to the lower surface of the arc-shaped pad I 24, and the upper surface of the arc-shaped pad I 24 is fixed to the elbow II 5 or the straight pipe V 8. The sliding support provides vertical support for the diversion pipe, restricts the vertical downward displacement of the diversion pipe, does not restrict the translational displacement, and can slide within a certain range on the base plate.

[0032] like Figure 6 As shown, the limiting support includes a support body and a limiting body. The support body mainly consists of a sliding base plate II 25, a support tube II 26, and an arc-shaped pad II 27. The limiting body is composed of a limiting block 28. The lower surface of sliding base plate II 25 slides in contact with the tank bottom plate, and the upper surface is fixed to the lower end of support pipe II 26. The upper end of support pipe II 26 is fixed to the lower surface of arc-shaped pad II 27, and the upper surface of arc-shaped pad II 27 is fixed to straight pipe VIII 12. The lower end of limiting block 28 is fixed to the tank bottom plate, and its axis points to the center of the distribution ring pipe. Limiting supports are set below each section of straight pipe VIII 12 and are evenly distributed to limit the vertical downward displacement of the distribution ring pipe. The distribution ring pipe may undergo overall translation under the action of the external piping system, and its own thermal expansion will also expand outward along the radial direction. Limiting block 28 is used to limit the displacement of the distribution ring pipe along the radial direction. The distance between limiting block 28 and support pipe II 26 meets the requirements of overall translation and thermal expansion.

[0033] The system is used: salt from the top of the diversion pipe entrance, flow to the distribution ring pipe, through the throttle hole 14 out. The sliding support and limit support make the expansion of the diversion pipe, the distribution ring pipe and the movement of the pipe system force have enough displacement, move within the limit.

Claims

1. A molten salt storage tank feed distribution system comprising a flow guide pipe, a distribution ring pipe, a guide support, a sliding support, a limiting support, characterized in that: The guide pipe is of multi-section structure, each section is connected with adjacent section through elbow, the distribution ring pipe is located at the bottom of the storage tank, the guide pipe enters from the top of the storage tank, extends to the distribution ring pipe, and the end is communicated with the distribution ring pipe, a plurality of throttling through holes (14) are formed on the distribution ring pipe, the guide support is fixed on the wall plate of the storage tank, the guide support contains a rectangular channel, one of the vertical pipes in the guide pipe passes through the rectangular channel, and the vertical pipe and the rectangular channel have a spacing movement distance, the sliding support is used for supporting the guide pipe, the upper part is fixedly connected with the support guide, and the lower part is in sliding contact with the bottom plate of the storage tank, the limiting support is used for supporting the distribution ring pipe, contains a support body and a limiting body, the upper part of the support body is fixedly connected with the distribution ring pipe, the lower part is in sliding contact with the bottom plate of the storage tank, and the limiting body is fixed to the bottom plate of the storage tank and located at the periphery of the support body, the support body has a displacement amount in the range of the limiting body.

2. A molten salt storage tank feed distribution system as claimed in claim 1 wherein: The guide pipe contains a vertical falling section and a horizontal flow section, the inclination angle of each pipe of the horizontal flow section is arranged to be 2°-5°, and the vertical falling section and the horizontal flow section are both formed by a plurality of pipes and elbows to form a Z-shaped arrangement, the middle pipe of the Z-shaped arrangement of the vertical falling section is arranged at an angle of 10°-45° with the horizontal plane, and each pipe of the Z-shaped arrangement of the horizontal flow section is arranged at an angle of 2°-5° with the horizontal plane.

3. A molten salt storage tank feed distribution system as claimed in claim 1, characterized in that: The distribution ring pipe is composed of straight pipes and 45° elbows and is arranged in an octagonal shape horizontally, and the center is coincident with the rotation axis of the wall plate of the storage tank.

4. A molten salt storage tank feed distribution system as claimed in claim 1 wherein: The guide support is composed of a longitudinal support (17), a transverse support (18), an inclined support I (19), a pad (20), and an inclined support II (21); the side surface of the longitudinal support (17) is fixedly connected with the inclined support I (19) in the same plane, the bottom surface of the longitudinal support (17) is fixedly connected with the inclined support II (21) in the same vertical plane, and the longitudinal support (17) and the inclined support II (21) are fixedly connected on the wall plate of the storage tank through the pad (20); the rectangular channel is formed by the longitudinal support (17) and the transverse support (18), and the long-axis of the rectangular channel is directed to the center axis of the storage tank.

5. A molten salt storage tank feed distribution system as claimed in claim 4 wherein: The inner side surface of the longitudinal support (17) is spaced apart from the outer wall surface of the vertical pipe passing through the rectangular channel by not more than 10 mm, so as to limit the transverse displacement of the vertical pipe, and the inner side surface of the transverse support (18) is spaced apart from the outer wall surface of the vertical pipe passing through the rectangular channel by not more than 100 mm, so as to limit the movement of the vertical pipe within a range of 200 mm in the radial direction of the storage tank.

6. A molten salt storage tank feed distribution system as claimed in claim 1, characterized by: The axis of the throttling through hole (14) is deflected outward by 5°-10°.

7. A molten salt storage tank feed distribution system as claimed in claim 1 wherein: The sliding support is vertically arranged and includes a sliding bottom plate I (22), a support pipe I (23), and an arc-shaped pad I (24), the lower end of the support pipe I (23) is fixedly connected with the upper surface of the sliding bottom plate I (22), and the upper end is fixedly connected with the lower surface of the arc-shaped pad I (24); the upper surface of the arc-shaped pad I (24) is fixedly connected with the horizontal flow section, and the lower surface of the sliding bottom plate I (22) is in sliding contact with the bottom plate of the storage tank.

8. A molten salt storage tank feed distribution system as claimed in claim 3, characterized by: The support body of the limiting support comprises a sliding bottom plate II (25), a support pipe II (26), and an arc-shaped cushion plate II (27), the limiting body is a limiting block (28), the lower end of the support pipe II (26) is fixedly connected with the upper surface of the sliding bottom plate II (25), and the upper end is fixedly connected with the lower surface of the arc-shaped cushion plate II (27); the upper surface of the arc-shaped cushion plate II (27) is fixedly connected with the straight pipe of the distribution ring pipe; the lower surface of the sliding bottom plate II (25) is in sliding contact with the storage tank bottom plate, and the limiting block (28) is fixedly connected with the storage tank bottom plate.

9. A molten salt storage tank feed distribution system as claimed in claim 3 wherein: A straight pipe of the distribution ring pipe is provided with a draining port (15) at the bottom of the cross section, and a scouring angle steel (16) is arranged at the draining port.

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