Steam storage device
By introducing a buffer guide shroud and spiral guide vanes into the steam storage device to form a swirling flow, and combining it with a steam distribution plate and a steam purification layer, the safety, stability, and thermal energy utilization issues of the steam storage device are solved, achieving miniaturization of the equipment and efficient steam dryness output.
Patent Information
- Application Number
- CN202520291397.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing steam storage devices suffer from problems such as large footprint, insufficient safety and stability, poor insulation performance, and low thermal energy utilization.
The design employs a buffer guide hood and spiral guide vanes to create a swirling flow, combined with a steam distribution plate and a steam purification layer to separate liquid water from the steam. A three-layer structure storage tank is used to improve thermal insulation performance.
To avoid localized steam impact, improve equipment safety and stability, enhance steam dryness, improve heat transfer efficiency, and reduce equipment size.
Smart Images
Figure CN223861520U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of industrial thermal energy storage technology, and in particular relates to a steam storage device. Background Technology
[0002] Steam storage devices are used to store the thermal energy of steam, playing a crucial role in boiler systems. They balance steam supply and demand, improve energy efficiency, and ensure the safe operation of the system. However, existing steam storage devices have limitations in terms of safety, stability, and thermal energy utilization. For example, direct steam entry into the tank can cause localized impacts, leading to localized high pressure, structural fatigue, and compromised safety and stability. Insufficient insulation results in heat loss, and low steam dryness reduces heat transfer efficiency and effective thermal energy. Utility Model Content
[0003] In view of this, in order to solve the above-mentioned technical problems, this utility model proposes a steam storage device that avoids local steam impact, has good safety and stability, achieves high dryness steam output, and improves thermal energy utilization.
[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:
[0005] A steam storage device, comprising:
[0006] The storage tank is provided with a steam inlet and a safety valve at the top, two dry steam outlets symmetrically located at the upper end of the side wall, and a drain outlet at the bottom.
[0007] A buffer guide shroud is suspended in the inner cavity of the storage tank, comprising a shell extending through both the upper and lower ends and vertically arranged spiral guide vanes disposed within the inner cavity of the shell; the top of the shell is fixed to the inner wall of the top of the storage tank and communicates with the steam inlet;
[0008] A steam distribution plate is provided around the outer wall of the cover, and its outer edge is connected to the inner wall of the tank; the steam distribution plate has multiple steam perforations.
[0009] A steam purification layer is disposed above the steam distribution plate and is used to separate liquid from the steam. The steam purification layer is arranged circumferentially around the outer wall of the cover, and its outer edge is connected to the inner wall of the tank. The area above the steam purification layer, the inner wall of the storage tank, and the outer wall of the cover is a dry steam zone, and the dry steam outlet is connected to the dry steam zone.
[0010] Steam enters the buffer guide shroud through the steam inlet at the top of the storage tank. Inside the shroud, it flows downwards along the spiral guide vanes, forming a swirling flow that buffers the steam impact and prolongs the residence time, trapping some condensate droplets which fall to the bottom of the storage tank. After exiting the bottom of the buffer guide shroud, the steam passes through the steam distribution plate. The steam perforations on the distribution plate ensure even steam distribution and reduce steam velocity unevenness. The steam continues to flow upwards, passing through the steam purification layer. The steam purification layer further separates the liquid droplets from the steam through physical separation, ensuring that the upward-flowing steam is dry steam. The dry steam enters the dry steam zone and is output through two dry steam outlets at the upper end of the tank side wall for subsequent use. The separated liquid settles at the bottom of the storage tank under gravity and is discharged through the drain port.
[0011] Furthermore, the storage tank includes an upper end cap, a tank body, and a lower end cap connected in sequence; the steam inlet, the safety valve port, and the dry steam outlet are located on the upper end cap; the drain port is located on the lower end cap, and a condensate recovery port is also provided on the side wall of the lower end cap.
[0012] Furthermore, the storage tank has a three-layer structure, including an inner stainless steel pressure-bearing layer coated with an anti-corrosion and high-temperature resistant coating, a middle aluminum silicate fiber insulation layer, and an outer carbon steel protective layer coated with an anti-corrosion and high-temperature resistant coating.
[0013] The storage tank adopts a three-layer structure, with an insulation layer in the middle, which can improve insulation performance and reduce heat loss.
[0014] Furthermore, the portion connecting the cover to the top of the storage tank has a flared structure, the main body section has a cylindrical structure, and the spiral guide vane is located inside the main body section.
[0015] Furthermore, the bottom of the casing has a serrated structure, which facilitates the collection of condensate droplets falling to the bottom of the storage tank.
[0016] Furthermore, the steam purification layer includes a corrugated plate demister and a wire mesh demister arranged from bottom to top.
[0017] The corrugated plate demister is made of 316L stainless steel with a PTFE hydrophobic coating on the surface; the wire mesh demister is made of 220-mesh 316L stainless steel wire mesh.
[0018] Furthermore, the steam equalization plate, the corrugated plate eliminator, and the wire mesh demister are all annular conical structures, with one side of the outer wall of the casing being the higher end; one side of the outer edge of the steam equalization plate, the outer edge of the corrugated plate eliminator, and the outer edge of the wire mesh demister are all provided with multiple condensate outflow holes along the circumference, and adjacent condensate outflow holes are connected by a guide pipe.
[0019] The droplets intercepted and collected at each layer can flow to the corresponding condensate outlet hole at each layer, and then be guided down layer by layer through the drainage pipe, eventually dripping to the bottom of the storage tank.
[0020] Compared with the prior art, the steam storage device of this utility model has the following advantages:
[0021] (1) The steam storage device described in this utility model, through the design of buffer guide shroud and spiral guide vane, forms a swirling flow after the steam enters the storage tank, avoiding direct impact on the local part of the tank body, reducing structural fatigue, and improving the safety and stability of the equipment;
[0022] (2) In the steam storage device described in this utility model, the steam after being buffered by the buffer guide hood is evenly distributed by the steam distribution plate and then enters the steam purification layer evenly and smoothly. The steam purification layer adopts a combination of a corrugated plate liquid separator and a wire mesh demister to effectively separate liquid water in the steam, improve the dryness of the output steam, and improve the heat transfer efficiency.
[0023] (3) The steam storage device described in this utility model has a three-layer structure for its outlet pipe, which optimizes the strength and heat preservation. It adopts a vertical storage tank design and combines a multi-layer separation structure to make the equipment small in size and suitable for industrial scenarios with limited space. Attached Figure Description
[0024] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:
[0025] Figure 1 This is a schematic diagram of the structure of the steam storage device according to an embodiment of the present invention.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1-Steam distribution plate, 2-Upper head, 3-Tank body, 4-Lower head, 5-Stainless steel pressure-bearing layer, 6-Aluminum silicate fiber insulation layer, 7-Carbon steel protective layer, 8-Steam inlet, 9-Safety valve port, 10-Dry steam outlet, 11-Drain port, 12-Condensate recovery port, 13-Shell, 14-Spiral guide vane, 15-Steam vent, 16-Condensate outlet, 17-Dry steam zone, 18-Wave plate demister, 19-Wire mesh demister, 20-Drainage pipe. Detailed Implementation
[0028] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0029] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0032] like Figure 1 As shown, a steam storage device includes a storage tank, a buffer guide shroud, a steam distribution plate 1, and a steam purification layer;
[0033] The storage tank includes an upper head 2, a tank body 3, and a lower head 4 connected in sequence; the storage tank has a three-layer structure, including an inner stainless steel pressure-bearing layer 5 coated with an anti-corrosion and high-temperature resistant coating, a middle aluminum silicate fiber insulation layer 6, and an outer carbon steel protective layer 7 coated with an anti-corrosion and high-temperature resistant coating; the upper head 2 is provided with a steam inlet 8 and a safety valve port 9 at the top, and two dry steam outlets 10 are symmetrically provided at the upper end of the side wall; the lower head 4 is provided with a drain port 11 at the bottom and a condensate recovery port 12 at the lower end of the side wall;
[0034] The buffer guide shroud is suspended in the inner cavity of the storage tank, including a cover 13 that runs through both the upper and lower ends and a vertically arranged spiral guide vane 14 located in the inner cavity of the cover 13; the upper part of the cover 13 has a flared structure, the main body has a cylindrical structure, and the bottom end has a serrated structure; the top of the flared structure of the cover 13 is fixed to the inner wall of the top of the storage tank and communicates with the steam inlet 8; the spiral guide vane 14 is located in the inner cavity of the main body of the cover 13;
[0035] The steam distribution plate 1 is arranged circumferentially around the outer wall of the cover 13, and its outer edge is connected to the inner wall of the tank 3; the steam distribution plate 1 has a ring cone structure, with the higher end on one side surrounding the outer wall of the cover 13; multiple steam permeable holes 15 are distributed on the steam distribution plate 1; multiple condensate outflow holes 16 are provided circumferentially on one side of the outer edge of the steam distribution plate 1.
[0036] A steam purification layer is located above the steam distribution plate 1. The steam purification layer is arranged circumferentially around the outer wall of the cover 13, and its outer edge is connected to the inner wall of the tank 3. The area enclosed by the steam purification layer, the inner wall of the storage tank, and the outer wall of the cover 13 is a dry steam zone 17. The dry steam outlet 10 is connected to the dry steam zone 17. The steam purification layer includes a corrugated plate demister 18 and a wire mesh demister 19 arranged from bottom to top. Both the corrugated plate demister 18 and the wire mesh demister 19 are annular conical structures, with the higher end on one side surrounding the outer wall of the cover 13. Multiple condensate outflow holes 16 are provided circumferentially on one side of the outer edge of the corrugated plate demister 18 and the outer edge of the wire mesh demister 19. The upper and lower adjacent condensate outflow holes 16 of the steam distribution plate 1, the corrugated plate demister 18, and the wire mesh demister 19 are connected by a guide pipe 20.
[0037] The working process of the steam storage device described in this utility model is as follows:
[0038] Wet steam (approximately 85% dryness) enters the equipment through steam inlet 8. The steam first enters the buffer guide shroud inside the casing 13. The flared structure of the guide shroud ensures a smooth transition of the steam flow. Guided by the spiral guide vanes 14 of the guide shroud, the steam forms a swirling flow. Droplets are thrown towards the inner wall of the casing 13 due to centrifugal force, initially separating large-diameter droplets. The swirling steam is further dispersed through the serrated structure at the bottom of the guide shroud, and then enters the steam distribution plate 1 area. Droplets are guided by the serrated structure and drip to the bottom of the tank 3. The steam perforations 15 on the steam distribution plate 1 evenly distribute the steam flow, avoiding localized high pressure. The steam then enters the corrugated plate separator 18. The V-shaped structure of the plate causes the steam to flow in a tortuous manner. Droplets collide with the plate wall due to inertia and coalesce into a liquid film, which is then discharged through the condensate outlet 16 at the outer edge of the corrugated plate and flows into the bottom of the tank 3 via the guide pipe 20. The steam, after passing through the corrugated plate demister 18, continues to rise and enters the wire mesh demister 19. The wire mesh demister 19 captures micron-sized droplets, which coalesce into a liquid film on the wire mesh surface and are discharged through the condensate outlet 16 at the outer edge of the wire mesh, flowing into the bottom of the tank 3 via the guide pipe 20. The dry steam (dryness ≥ 99%) after multi-stage separation enters the dry steam zone 17 and is stably output through the dry steam outlet 10 for use by downstream equipment. The condensate is discharged through the condensate recovery port 12 on the side wall of the lower head 4 and enters an external waste heat recovery system (such as a heat exchanger), transferring the waste heat from the condensate to the boiler feedwater system, further improving thermal energy utilization.
[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A steam storage device, characterized in that, include: The storage tank is provided with a steam inlet and a safety valve at the top, two dry steam outlets symmetrically located at the upper end of the side wall, and a drain outlet at the bottom. A buffer guide shroud is suspended in the inner cavity of the storage tank, comprising a shell extending through both the upper and lower ends and vertically arranged spiral guide vanes disposed within the inner cavity of the shell; the top of the shell is fixed to the inner wall of the top of the storage tank and communicates with the steam inlet; A steam distribution plate is provided around the outer wall of the cover, and its outer edge is connected to the inner wall of the storage tank; the steam distribution plate has a plurality of steam perforations. A steam purification layer is disposed above the steam distribution plate and is used to separate liquid from the steam. The steam purification layer is arranged circumferentially around the outer wall of the cover, and its outer edge is connected to the inner wall of the storage tank. The area enclosed by the steam purification layer, the inner wall of the storage tank, and the outer wall of the cover is a dry steam zone, and the dry steam outlet is connected to the dry steam zone.
2. The steam storage device according to claim 1, characterized in that: The storage tank includes an upper head, a tank body, and a lower head connected in sequence; the steam inlet, the safety valve port, and the dry steam outlet are located on the upper head; the drain port is located on the lower head, and a condensate recovery port is also provided on the side wall of the lower head.
3. The steam storage device according to claim 1, characterized in that: The storage tank has a three-layer structure, including an inner stainless steel pressure-bearing layer coated with an anti-corrosion and high-temperature resistant coating, a middle aluminum silicate fiber insulation layer, and an outer carbon steel protective layer coated with an anti-corrosion and high-temperature resistant coating.
4. The steam storage device according to claim 1, characterized in that: The part where the cover connects to the top of the storage tank has a flared structure, the main body section has a cylindrical structure, and the spiral guide vane is located in the inner cavity of the main body section.
5. The steam storage device according to claim 1, characterized in that: The bottom of the cover has a serrated structure.
6. The steam storage device according to claim 1, characterized in that: The steam purification layer includes a corrugated plate demister and a wire mesh demister arranged from bottom to top.
7. The steam storage device according to claim 6, characterized in that: The steam equalization plate, the corrugated plate eliminator, and the wire mesh demister are all annular conical structures, with the higher end surrounding the outer side wall of the casing. The outer edge of the steam equalization plate, the outer edge of the corrugated plate eliminator, and the outer edge of the wire mesh demister are all provided with multiple condensate outflow holes along the circumference, and adjacent condensate outflow holes are connected by a guide pipe.