Superheated steam generation system

Abstract

The present invention discloses a superheated steam generation system, comprising: a heat accumulator having a tank body and a multi-stage composite steam dehydration structure disposed in the upper inner cavity of the tank body, wherein a steam inlet pipe and a steam outlet pipe are disposed at the top of the tank body, and the steam inlet pipe can extend into the lower inner cavity of the tank body; wherein the multi-stage composite steam dehydration structure includes a first-stage dehydration element having multiple layers of closely packed tube bundles spaced apart along a first direction; a heat charging pipeline connected to the steam inlet pipe; and a heat dissipation pipeline having a first pipeline and a second pipeline, the first pipeline being connected to the steam outlet pipe, and the second pipeline having a first steam pipe and a second steam pipe, the first steam pipe being connected to the steam inlet of the multiple layers of closely packed tube bundles, and the second steam pipe being connected to the steam outlet of the multiple layers of closely packed tube bundles. This superheated steam generation system not only reduces the size of the equipment and saves space, but also can generate high-quality steam and superheated steam, thereby improving the stability and safety of the steam transmission network and facilitating steam utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of intermittent steam storage, transportation and utilization, and in particular to a superheated steam generating system. Background Art

[0002] Due to the cyclical nature of converter steelmaking, the steam evaporation rate generated during the oxygen blowing period increases rapidly from zero to several hundred tons per hour during the entire smelting cycle, with severe fluctuations. At the same time, since steam carries water, the flow of steam and water causes vibration or water hammer during transportation and use, posing a safety hazard to the transportation network or equipment. Summary of the Invention

[0003] The purpose of the present invention is to provide a superheated steam generating system that can utilize its own steam energy to heat the steam for external transmission, convert the wet saturated steam into superheated steam, reduce the water hammer and drainage of the steam pipeline, improve the reliability and safety of the transmission pipeline network, and facilitate the effective use of steam.

[0004] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0005] The present invention provides a superheated steam generation system, comprising: a heat accumulator having a tank body and a multi-stage composite steam dehydration structure arranged in the upper inner cavity of the tank body, a steam inlet pipe and a steam outlet pipe being provided on the top of the tank body, the steam inlet pipe being able to extend into the lower inner cavity of the tank body, and the multi-stage composite steam dehydration structure being located below the steam outlet pipe; wherein the multi-stage composite steam dehydration structure has a first-stage dehydration component, the first-stage dehydration component comprises a multi-layer close-packed tube bundle spaced apart along a first direction, each layer of the close-packed tube bundle having a plurality of tube bodies arranged side by side; a heat charging pipeline connected to the steam inlet pipe; a heat releasing pipeline having a first pipeline and a second pipeline, the first pipeline being connected to the steam outlet pipe, the second pipeline having a first steam pipe and a second steam pipe, the first steam pipe being connected to the steam inlet of the multi-layer close-packed tube bundle, and the second steam pipe being connected to the steam outlet of the multi-layer close-packed tube bundle.

[0006] Preferably, the first steam pipe is connected to the steam inlet of the multi-layer close-packed tube bundle through a steam inlet manifold.

[0007] Preferably, the second steam pipe is connected to the steam outlet of the multi-layer close-packed tube bundle through a steam outlet collecting pipe.

[0008] Preferably, the free end of the first pipeline is connected to the steam main pipe through a first check valve, and the hot charging pipeline is connected to the steam main pipe through a second check valve.

[0009] Preferably, the first steam pipe is connected to the first pipeline, and a pressure regulating valve is connected to the first steam pipe.

[0010] Preferably, the first steam pipe is connected to the steam main pipe, and a pressure regulating valve is connected to the first steam pipe.

[0011] Preferably, the first steam pipe is further connected to a dehydrator.

[0012] Preferably, the multi-stage composite steam dehydration structure further includes: a secondary dehydration component, located above the primary dehydration component, the secondary dehydration component having a plurality of corrugated plates arranged at intervals along the horizontal direction; a tertiary dehydration component, located above the secondary dehydration component, the tertiary dehydration component consisting of a plurality of connected bent orifice plates, the bent orifice plates being provided with a plurality of perforations.

[0013] Preferably, the multiple tube bodies of each layer of the closely packed tube bundle are arranged side by side along the first direction.

[0014] Preferably, the multiple tube bodies of each layer of the closely packed tube bundle are staggered along the first direction.

[0015] Preferably, the first direction is the direction of gravity; or, the first direction is the horizontal direction.

[0016] Preferably, the bent orifice plate comprises a first orifice plate and a second orifice plate arranged at an angle, and the first orifice plate and the second orifice plate are both provided with a plurality of the perforations.

[0017] Preferably, the multiple bent orifice plates are connected in a horizontal direction, and at least one drainage hole is provided between any two adjacent bent orifice plates, and the drainage hole is connected to a first drainage pipe, which includes a vertical pipe and a U-shaped pipe connected to the lower end of the vertical pipe, and the upper end of the vertical pipe is connected to the drainage hole.

[0018] Preferably, the second drainage pipe is connected below the at least one drainage hole, and the second drainage pipe is connected to multiple first drainage pipes.

[0019] Preferably, the horizontal height of the connection position between the first orifice plate and the second orifice plate is higher than the horizontal height of the drainage hole.

[0020] Preferably, the plurality of bent orifice plates are arranged in a vertical direction, and the plurality of bent orifice plates are arranged to form a cylindrical structure.

[0021] Preferably, the tube body is a cylindrical tube body.

[0022] The characteristics and advantages of the superheated steam generating system of the present invention are:

[0023] On the one hand, the superheated steam generation system reduces the size of the equipment and saves space, and on the other hand, it can generate high-quality steam and superheated steam, thereby improving the stability and safety of the steam transmission network and facilitating the use of steam. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 Schematic diagram of the structure of the superheated steam generating system of the present invention;

[0026] Figure 2 Schematic diagram of the structure of another embodiment of the superheated steam generating system of the present invention;

[0027] Figure 3 Schematic diagram of the internal structure of the heat accumulator of the present invention;

[0028] Figure 4 This is a structural diagram of the first-stage dehydration component of the composite steam dehydration structure of the present invention;

[0029] Figure 5 A structural diagram of another embodiment of a first-stage dehydration component of the composite steam dehydration structure of the present invention;

[0030] Figure 6 This is a structural diagram of the secondary dehydration component of the composite steam dehydration structure of the present invention;

[0031] Figure 7 This is a structural diagram of the three-stage dehydration component of the composite steam dehydration structure of the present invention;

[0032] Figure 8 for Figure 7 Cross-sectional view along the AA axis;

[0033] Figure 9 for Figure 7 A cross-sectional view of another embodiment taken along line AA;

[0034] Figure 10 This is a cross-sectional view of another embodiment of the three-stage dehydration component of the composite steam dehydration structure of the present invention.

[0035] Description of reference numerals:

[0036] 1000. Superheated Steam Generation System; 1. Regenerator; 11. Tank; 111. Steam Inlet Pipe; 112. Steam Outlet Pipe; 16. Support Legs; 17. Mounting Frame; 1212. Multi-stage Composite Steam Dehydration Structure; 13. First-stage Dehydration Component; 131. Closely Packed Tube Bundle; 1311. Tube Body; 2. Heat Charging Pipeline; 21. Second Check Valve; 3. Heat Release Pipeline; 31. First Pipeline; 311. First Check Valve; 32. Second Pipeline; 321. First Steam Pipe; 3211. Dehydrator; 322. Second Steam Pipe; 4. Steam Inlet Manifold; 5. , steam outlet collecting pipe; 6, steam main pipe; 7, pressure regulating valve; 14, secondary dehydration component; 141, corrugated plate; 15, tertiary dehydration component; 151, bent orifice plate; 1511, perforation; 1512, first orifice plate; 1513, second orifice plate; 152, drainage hole; 153, first drainage pipeline; 1531, vertical pipe; 1532, U-shaped pipe; 154, second drainage pipeline; D, gap between corrugated plates; H1, horizontal height of the connection position between the first orifice plate and the second orifice plate; H2, horizontal height of the drainage hole; F, first direction. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] The present invention provides a superheated steam generation system 1000, see Figures 1 to 10 , including heat accumulator 1, heat charging pipeline 2 and heat dissipation pipeline 3. For details, please refer to Figure 1 and Figure 2 The heat accumulator 1 comprises a tank body 11 and a multi-stage composite steam dehydration structure 1212 arranged in the upper inner cavity of the tank body 11. A steam inlet pipe 111 and a steam outlet pipe 112 are provided on the top of the tank body 11. The steam inlet pipe 111 can extend into the lower inner cavity of the tank body 11. The multi-stage composite steam dehydration structure 1212 is located below the steam outlet pipe 112. The multi-stage composite steam dehydration structure 1212 comprises a first-stage dehydration element 13, which comprises multiple layers of closely spaced components spaced apart along a first direction F. The tube bundle 131, each layer of the closely packed tube bundle 131 has a plurality of tube bodies 1311 arranged side by side; the heat charging pipeline 2 is connected to the steam inlet pipe 111; the heat releasing pipeline 3 has a first pipeline 31 and a second pipeline 32, the first pipeline 31 is connected to the steam outlet pipe 112, the second pipeline 32 has a first steam pipe 321 and a second steam pipe 322, the first steam pipe 321 is connected to the steam inlet of the multi-layer closely packed tube bundle 131, and the second steam pipe 322 is connected to the steam outlet of the multi-layer closely packed tube bundle 131.

[0039] The superheated steam generation system 1000 of the present invention has two operating modes: charging and releasing heat. When the pressure in the heat accumulator 1 is lower than the pressure of the external steam, the external steam will enter the heat accumulator 1 along the charging pipe 2 and complete the charging process. When the pressure in the heat accumulator 1 is higher than the pressure of the external steam, the steam in the heat accumulator 1 will release heat along the first pipe 31 and be output. At the same time, the output steam will flow back into the heat accumulator 1 through the second pipe 32, be heated by the wet steam in the heat accumulator 1, and then be output. The superheated steam generation system 1000 utilizes the multi-layered closely packed tube bundles 131 of the first-stage dehydration element 13 of the multi-stage composite steam dehydration structure 1212. This not only removes liquid water from the steam, but also uses the wet steam in the heat accumulator 1 to heat the steam flowing back into these closely packed tube bundles 131. The first-stage dehydration element 13 can both dehydrate and exchange heat.

[0040] The superheated steam generating system of the present invention can utilize its own steam energy to heat the steam for external transmission, converting wet saturated steam into superheated steam, reducing water hammer and water discharge in the steam pipeline, improving the reliability and safety of the transmission pipeline network, and facilitating the effective utilization of steam. The present invention does not utilize an external heat source and will not increase external energy consumption.

[0041] According to one embodiment of the present invention, see Figure 1 and Figure 2 The first steam pipe 321 is connected to the multiple steam inlets of the multi-layer close-packed tube bundle 131 through the steam inlet manifold 4. Furthermore, the second steam pipe 322 is connected to the multiple steam outlets of the multi-layer close-packed tube bundle 131 through the steam outlet manifold 5.

[0042] The steam inlet collecting pipe 4 can serve to bring together the steam inlets of each tube body 1311 in the multi-layer close-packed tube bundle 131, so that the steam transported into the steam inlet collecting pipe 4 can be evenly distributed to each tube body 1311 in the multi-layer close-packed tube bundle 131; the steam outlet collecting pipe 5 can serve to bring together the steam outlets of each tube body 1311 in the multi-layer close-packed tube bundle 131, so that the steam output through each tube body 1311 in the multi-layer close-packed tube bundle 131 can be collected in the steam outlet collecting pipe 5, and then sent out of the heat accumulator 1 through the second steam pipe 322.

[0043] The arrangement of the steam inlet collecting pipe 4 and the steam outlet collecting pipe 5 can make the heat exchange of each tube body 1311 in the multi-layer close-packed tube bundle 131 more uniform and improve the heat exchange efficiency.

[0044] According to one embodiment of the present invention, see Figure 1 and Figure 2 The free end of the first pipeline 31 is connected to the steam main pipe 6 through the first check valve 311, and the hot charging pipeline 2 is connected to the steam main pipe 6 through the second check valve 21.

[0045] The first check valve 311 allows steam to enter the steam header 6 from the free end of the first pipeline 31 while preventing external steam from entering the first pipeline 31 from the steam header 6. Furthermore, the second check valve 21 allows steam in the steam header 6 to enter the heat charging pipeline 2 while preventing steam from entering the steam header 6 along the heat charging pipeline 2. This ensures that when the pressure in the heat accumulator 1 is greater than the pressure in the steam header 6, steam can only be transported and discharged outward along the first pipeline 31.

[0046] In one embodiment of the present invention, see Figure 1 The first steam pipe 321 is connected to the first pipeline 31 , the first steam pipe 321 is connected to the pressure regulating valve 7 , and the free end of the first pipeline 31 is connected to the steam main pipe 6 through the first check valve 311 .

[0047] The working process of the superheated steam generation system 1000 in this embodiment is described in detail below:

[0048] When the pressure of the wet steam in the steam main pipe 6 is higher than the pressure in the heat accumulator 1, it will enter the heat accumulator 1 through the second check valve 21 and the heat charging pipeline 2, so as to be dehydrated through the multi-stage composite steam dehydration structure 1212; when the pressure of the wet steam in the steam main pipe 6 is lower than the pressure in the heat accumulator 1, the wet steam in the heat accumulator 1 will enter the steam main pipe 6 through the first pipeline 31 and the first check valve 311 after dehydration.

[0049] During this process, the wet steam in the heat accumulator 1 is divided into two paths after passing through the multi-stage composite steam dehydration structure 1212. One path of steam passes through the first pipeline 31 and the first check valve 311 and is output to the steam main pipe 6; the other path of steam passes through the first pipeline 31 and the first steam pipe 321, and then flows back to each tube body 1311 of the multi-layer close-packed tube bundle 131 of the first-stage dehydration component 13 of the multi-stage composite steam dehydration structure 1212 to exchange heat with the steam in the heat accumulator 1, thereby becoming superheated steam and being output from the second steam pipe 322.

[0050] The present invention enables wet steam to be efficiently dehydrated in the heat accumulator 1 while exchanging heat with low-pressure steam. Part of the steam is converted into condensed water, and part of the steam is discharged from the heat accumulator 1. In addition, the low-pressure saturated steam is heated by the external high-pressure saturated steam in each tube body 1311 of the closely packed tube bundle 131, and is converted into superheated steam.

[0051] The pressure-regulating valve 7 is installed on the first steam pipe 321 to lower the pressure of the steam returning to the first-stage dehydration element 13 of the multi-stage composite steam dehydration structure 1212, thereby facilitating heat exchange between this low-pressure steam and the wet steam in the heat accumulator 1 within the multi-layered, closely packed tube bundle 131. Because the steam within the closely packed tube bundle 131 contains less liquid water and has a lower pressure, heat exchange efficiency is increased. This allows the user to easily control the volume of superheated steam generated within a given timeframe by adjusting the pressure-regulating valve 7, thereby providing greater flexibility in operation. Of course, in some embodiments, the pressure-regulating valve 7 may not be installed on the first steam pipe 321, thereby ensuring that the superheated steam discharged from the second steam pipe 322 is discharged according to the set value.

[0052] In another embodiment of the present invention, see Figure 2 The first steam pipe 321 is connected to the steam main pipe 6 , and a pressure regulating valve 7 is connected to the first steam pipe 321 .

[0053] The working process of the superheated steam generation system 1000 in this embodiment is described in detail below:

[0054] When the pressure of the wet steam in the steam main pipe 6 is higher than the pressure in the heat accumulator 1, it will enter the heat accumulator 1 through the second check valve 21 and the heat charging pipeline 2, so as to be dehydrated through the multi-stage composite steam dehydration structure 1212; when the pressure of the wet steam in the steam main pipe 6 is lower than the pressure in the heat accumulator 1, the wet steam in the heat accumulator 1 will enter the steam main pipe 6 through the first pipeline 31 and the first check valve 311 after dehydration.

[0055] During this process, the wet steam in the heat accumulator 1 is divided into two paths after passing through the multi-stage composite steam dehydration structure 1212. One path of steam passes through the first pipeline 31 and the first check valve 311, and is output to the steam main pipe 6 and discharged; the other path of steam passes through the first pipeline 31 and the first check valve 311, flows through the first steam pipe 321, and then flows back to each tube body 1311 of the multi-layer close-packed tube bundle 131 of the first-stage dehydration component 13 of the multi-stage composite steam dehydration structure 1212 to exchange heat with the steam in the heat accumulator 1, thereby becoming superheated steam and being output from the second steam pipe 322.

[0056] The present invention enables efficient dehydration of wet steam within the heat accumulator 1 while simultaneously exchanging heat with low-pressure steam. Part of the steam is converted into condensate, while part is discharged from the heat accumulator 1. Furthermore, low-pressure saturated steam is heated by external high-pressure saturated steam within each tube 1311 of the closely packed tube bundle 131, becoming superheated steam. When superheated steam is required, both the high-quality steam entering the steam header 6 from the first pipeline 31 and the steam entering the steam header 6 directly from the outside can enter the second pipeline 32. In other words, as long as there is consumption of superheated steam, any type of steam in the steam header 6 can enter the second pipeline 32. This steam is then pressure-regulated in the first steam pipe 321 by the pressure regulating valve 7, becoming low-pressure steam. This low-pressure steam then enters the multi-layer closely packed tube bundle 131, exchanges heat with the steam in the heat accumulator 1, and becomes superheated steam. This superheated steam is then output along the second steam pipe 322.

[0057] The present invention adopts this design, which, on the one hand, reduces the demand for high-quality steam for generating superheated steam; on the other hand, it does not restrict the type of steam entering the second pipeline 32, thereby expanding the scope of use.

[0058] For further information, see Figure 2 In this embodiment, a dehydrator 3211 is further connected to the first steam pipe 321. The dehydrator 3211 can further reduce the dehydration of the steam entering the multi-layer close-packed tube bundle 131, thereby facilitating rapid heat exchange between the steam in the heat accumulator 1 and the steam in the multi-layer close-packed tube bundle 131, thereby saving heat exchange time.

[0059] According to one embodiment of the present invention, see Figure 3 As shown, the multi-stage composite steam dehydration structure 1212 further includes a secondary dehydration component 14 and a tertiary dehydration component 15 , that is, the multi-stage composite steam dehydration structure 1212 includes a primary dehydration component 13 , a secondary dehydration component 14 and a tertiary dehydration component 15 .

[0060] Specifically, the primary dehydration element 13 has multiple layers of closely packed tube bundles 131 spaced apart along the first direction F, and each layer of closely packed tube bundle 131 has multiple tube bodies 1311 arranged side by side.

[0061] In one embodiment, see Figure 4 The multiple tubes 1311 of each layer of closely packed tube bundles 131 are arranged side by side along the first direction F. That is, the closely packed tube bundles 131 of each layer are arranged vertically opposite each other in the first direction F. This structure can reduce the resistance encountered by steam during upward movement, thereby ensuring a high exhaust steam pressure and meeting the requirement for high-pressure steam discharge.

[0062] In another embodiment, see Figure 5The multiple tubes 1311 of each layer of closely packed tube bundles 131 are staggered along a first direction F. That is, in the first direction F, the tubes 1311 in the upper layer of closely packed tube bundles 131 are positioned above the gaps between two adjacent tubes 1311 in the lower layer of closely packed tube bundles 131. This structure increases the resistance encountered by steam during its upward movement, thereby generating turbulence and ensuring more uniform and complete contact between the steam and the multiple tubes 1311 in the closely packed tube bundles 131. This, in turn, allows more liquid droplets in the steam to adhere to the outer surfaces of the tubes 1311, thereby improving the effectiveness of filtering out liquid water.

[0063] In this embodiment, the first direction F is the direction of gravity, and the tubes 1311 in each close-packed tube bundle 131 are arranged parallel to each other in the horizontal direction. When liquid droplets gradually gather and increase on the close-packed tube bundle 131, the surface tension of the water and the gravity of the large droplets formed by the gathering cause the droplets to flow downward in the radial direction of the close-packed tube bundle 131. In another embodiment, the first direction F is the horizontal direction, and the tubes 1311 in each close-packed tube bundle 131 are arranged parallel to each other in the direction of gravity. When liquid droplets gradually gather and increase on the close-packed tube bundle 131, the surface tension of the water and the gravity of the large droplets formed by the gathering cause the droplets to flow downward in the longitudinal direction of the close-packed tube bundle 131.

[0064] In this embodiment, the tube body 1311 may be a cylindrical hollow tube body, and of course may also be a structure with an inner cavity and other cross-sectional shapes, which is not limited here.

[0065] like Figure 6 As shown, the secondary dehydration element 14 is located above the primary dehydration element 13 and comprises a plurality of corrugated plates 141 spaced horizontally apart. After being dehydrated by the primary dehydration element 13, the wet steam flows upward and comes into contact with the secondary dehydration element 14, specifically, the plurality of corrugated plates 141 spaced horizontally apart. As the wet steam passes through the gaps D between the plates 141, some water droplets adhere to the surfaces of the plates 141 due to molecular tension. As the droplets gradually accumulate on the plates 141, the surface tension of the water and the gravity of the large droplets cause them to flow down the curved surfaces of the plates 141.

[0066] The multiple corrugated plates 141 of the secondary dehydration element 14 increase the contact area between the steam and the secondary dehydration element 14, thereby filtering out more liquid water. Furthermore, because the corrugated plates 141 are arranged along the direction of gravity, the curved surfaces of the corrugated plates 141 provide channels for liquid droplets to slide down, thereby facilitating their accumulation and discharge. Of course, in some embodiments, flat plates can be used in place of the corrugated plates 141 to achieve the same goal of filtering out liquid water.

[0067] The tertiary dehydration element 15 is located above the secondary dehydration element 14 and is composed of a plurality of connected bent orifice plates 151, each of which has perforations 1511. After being dehydrated by the secondary dehydration element 14, the wet steam continues to flow upward and passes through the tertiary dehydration element 15 for tertiary dehydration.

[0068] See Figures 7 to 9 As shown, in this embodiment, the bent orifice plate 151 has a first orifice plate 1512 and a second orifice plate 1513 arranged at an angle, and both the first orifice plate 1512 and the second orifice plate 1513 are provided with a perforation 1511. The present invention adopts this design. On the one hand, there is no need to bend an entire plate, thereby reducing the difficulty of processing and saving processing procedures; on the other hand, it is easy to disassemble and transport, saving transportation space. Of course, in other embodiments, the bent orifice plate 151 can also be formed by bending a whole porous plate, that is, the first orifice plate 1512 and the second orifice plate 1513 are formed as one piece, so its integration is higher and the installation efficiency is also higher.

[0069] For further information, see Figures 7 to 9 Multiple bent orifice plates 151 are connected horizontally, and at least one drainage hole 152 is provided between any two adjacent bent orifice plates 151. A first drainage pipe 153 is connected to the drainage hole 152. The first drainage pipe 153 includes a vertical pipe 1531 and a U-shaped pipe 1532 connected to the lower end of the vertical pipe 1531. The upper end of the vertical pipe 1531 is connected to the drainage hole 152. In other words, each drainage hole 152 is connected to a first drainage pipe 153, thereby ensuring that each first drainage pipe 153 and each drainage hole 152 form a separate drainage channel, thereby preventing the occurrence of a situation where a drainage channel is blocked and liquid droplets cannot be discharged smoothly.

[0070] After the three-stage dehydration element 15 completes dehydration, the droplets will flow into the drainage hole 152 along the inclined surface of the bent orifice plate 151, and then enter from one end of the vertical tube 1531 in the first drainage pipeline 153 and flow into the U-shaped tube 1532 connected to the other end of the vertical tube 1531; as the drainage volume continues to increase, the droplets continue to accumulate in the U-shaped tube 1532, and when the volume of the droplets reaches the set threshold, they are discharged from the free end of the U-shaped tube 1532.

[0071] In this embodiment, the U-shaped tube 1532 has a first vertical section, a second vertical section, and a horizontal section connected between the first vertical section and the second vertical section, that is, the vertical tube 1531 is connected to the first vertical section, and the second vertical section is the free end of the U-shaped tube 1532. When the volume of the droplet reaches a set threshold, it can be discharged from the port of the second vertical section.

[0072] In the initial state of some embodiments, a certain amount of water can be stored in the U-shaped tube 1532 to prevent steam from entering the vertical tube 1531 through the U-shaped tube 1532 and blocking the channel for the droplets to flow downward, thereby facilitating the discharge of droplets and preventing the accumulation of droplets in the area between two adjacent bent orifice plates 151, thereby causing erosion of the bent orifice plates 151 and improving the service life of the product.

[0073] In some embodiments, the vertical tube 1531 of the first drainage pipeline 153 sequentially passes downward through the secondary dehydration element 14 and the primary dehydration element 13, so that the U-shaped tube 1532 is located below the primary dehydration element 13. Thus, liquid discharged from the free end of the U-shaped tube 1532 can directly fall below the first dehydration element, forming an independent drainage channel, thereby preventing the occurrence of poor dehydration effects caused by droplets falling on the primary dehydration element 13 and the secondary dehydration element 14. Of course, in other embodiments, the U-shaped tube 1532 can also be arranged above or below the secondary dehydration element 14, so that droplets can be discharged from the free end of the U-shaped tube 1532 and fall on the primary dehydration element 13 and / or the secondary dehydration element 14 below the tertiary dehydration element 15, and this is not limited here.

[0074] In other embodiments, see Figure 9 The multi-stage composite steam dehydration structure 1212 further includes a second drainage pipeline 154, which is connected below at least one drainage hole 152. The second drainage pipeline 154 can be connected to the first drainage pipeline 153. Specifically, the upper end of the vertical pipe 1531 of the first drainage pipeline 153 can be connected to the first drainage pipeline 153. In this embodiment, liquid droplets flow from the multiple drainage holes 152 into the second drainage pipeline 154 and merge into one. The droplets then flow along the vertical pipe 1531 and enter the U-shaped pipe 1532.

[0075] This design allows the present invention to collect droplets flowing from multiple drainage holes 152 into a single unit, thereby completing the drainage function by simply connecting a single first drainage pipe 153 to the lower end of the second drainage pipe 154. Of course, in some embodiments, the lower end of the second drainage pipe 154 can also be connected to multiple first drainage pipes 153, thereby ensuring that the second drainage pipe 154 and the multiple first drainage pipes 153 form multiple independent drainage channels, thereby avoiding the situation where a single drainage channel is blocked and the liquid droplets cannot be discharged smoothly.

[0076] In the embodiment of the present invention, see Figure 8 and Figure 9The horizontal height H1 of the connection point between the first orifice plate 1512 and the second orifice plate 1513 is higher than the horizontal height H2 of the drainage hole 152, that is, there is a horizontal height difference (i.e., H1-H2) between the connection point between the first orifice plate 1512 and the second orifice plate 1513 and the location of the drainage hole 152, that is, the first orifice plate 1512 and the second orifice plate 1513 are both inclined. The present invention utilizes this horizontal height difference (i.e., H1-H2) to guide the droplets filtered by the three-stage dehydration element 15 into the drainage holes 152. In other words, the droplets adhering to the surfaces of the first orifice plate 1512 and the second orifice plate 1513 are guided along their respective inclined directions to the location of each drainage hole 152, thereby facilitating the timely discharge of the filtered liquid water. At the same time, it also prevents the droplets from eroding the first orifice plate 1512 and the second orifice plate 1513, thereby improving the service life of the product.

[0077] In another embodiment, the first orifice plate 1512 and the second orifice plate 1513 are integrally formed into a bent orifice plate 151 , so that two parallel sides of the bent orifice plate 151 have different horizontal heights. That is, the horizontal height of the connection position of the first orifice plate 1512 and the second orifice plate 1513 is higher than the horizontal height of the drainage hole 152. Therefore, when steam passes through the perforation 1511 on the bent orifice plate 151 (i.e., the first orifice plate 1512 and the second orifice plate 1513), a part of the water droplets therein adhere to the surface of the bent orifice plate 151 (i.e., the first orifice plate 1512 and the second orifice plate 1513) due to molecular tension. When the droplets gradually gather and increase on the bent orifice plate 151 (i.e., the first orifice plate 1512 and the second orifice plate 1513), due to the surface tension of the water and the gravity of the large water droplets formed by the gathering, the droplets flow along the surface of the bent orifice plate 151 (i.e., the first orifice plate 1512 and the second orifice plate 1513) to the position of the drainage hole 152, thereby discharging the filtered liquid water.

[0078] In yet another embodiment, see Figure 10 Multiple curved orifice plates 151 are arranged vertically (i.e., in the direction of gravity) and form a cylindrical structure. The cylindrical structure's shape varies depending on the number of curved orifice plates 151, and generally takes the shape of a corrugated cylinder. Steam can pass horizontally through the perforations 1511 in the cylindrical structure, allowing droplets in the steam to adhere to the surfaces of the curved orifice plates 151. The surface tension of the water and the gravity of the large droplets that form are then used to cause the droplets to flow downward along the surface of the cylindrical structure and be discharged.

[0079] In some embodiments, see Figure 3The regenerator 1 further includes a mounting bracket 17, to which the aforementioned multi-stage composite steam dehydration structure 1212 is fixed. Specifically, the primary dehydration element 13, the secondary dehydration element 14, and the tertiary dehydration element 15 are sequentially mounted on the mounting bracket from bottom to top. The mounting bracket 17 is fixed within the tank body 11 of the regenerator 1. The provision of the mounting bracket 17 improves the product's integration and facilitates overall installation and removal.

[0080] Those skilled in the art should understand that in order to fix the heat accumulator 1 and enable it to function normally, a plurality of legs 16 capable of supporting the tank body 11 are also connected to the lower end of the tank body 11. These legs 16 are conventional fixing structures and are not the focus of the present invention, so they will not be described in detail here.

[0081] The multi-stage composite steam dehydration structure 1212 can filter out liquid water from the wet steam in the heat accumulator 1 at multiple stages through the first-stage dehydration component 13, the second-stage dehydration component 14, and the third-stage dehydration component 15, thereby increasing the dryness of the steam discharged from the heat accumulator 1 to the steam outlet pipe 112 and reducing the safety hazard of "water hammer" occurring in the steam pipeline.

[0082] The dehydration process of the multi-stage composite steam dehydration structure 1212 is described in detail below:

[0083] When the wet steam in the heat accumulator 1 passes through the outer surfaces of the tubes 1311 of the multi-layer close-packed tube bundle 131 of the first-stage dehydration element 13, the wet steam collides with the tubes 1311 of the multi-layer close-packed tube bundle 131. Some water droplets form a water film on the close-packed tube bundle 131, while other water droplets adhere to the outer surfaces of the tubes 1311 of the multi-layer close-packed tube bundle 131 due to molecular tension. When the droplets gradually gather and increase on the tubes 1311 of the multi-layer close-packed tube bundle 131, due to the surface tension of the water and the gravity of the large water droplets formed by the gathering, the droplets flow down along the outer surface of the close-packed tube bundle 131.

[0084] The wet steam after the primary dehydration continues to move upward and contacts the secondary dehydration element 14 to perform secondary dehydration treatment on the wet steam.

[0085] After passing through the secondary dehydration element 14, the steam continues to move upward and contacts the tertiary dehydration element 15. Specifically, as the steam passes through the perforations 1511 in the bent orifice plate 151, some of the water droplets adhere to the surface of the bent orifice plate 151 due to molecular tension. As the droplets gradually accumulate on the bent orifice plate 151, the surface tension of the water and the gravity of the large droplets cause the droplets to flow down the surface of the bent orifice plate 151.

[0086] Those skilled in the art should understand that the present invention adopts the bent orifice plate 151, on the one hand, to allow steam to pass through the perforations 1511 opened thereon, thereby causing droplets in the steam to adhere to the surface of the bent orifice plate 151, thereby achieving the function of filtering out liquid water; on the other hand, by bending the bent plate, the contact area between the steam and the three-stage dehydration element 15 can be increased within a limited space, thereby improving the effect of filtering out liquid water.

[0087] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A superheated steam generating system, characterized in that: include: A heat accumulator comprising a tank body and a multi-stage composite steam dehydration structure disposed in an upper inner cavity of the tank body, the multi-stage composite steam dehydration structure being used to remove liquid water from steam within the tank body; a steam inlet pipe and a steam outlet pipe being disposed at the top of the tank body, the steam inlet pipe being capable of extending into a lower inner cavity of the tank body, the multi-stage composite steam dehydration structure being located below the steam outlet pipe; wherein the multi-stage composite steam dehydration structure comprises a first-stage dehydration element comprising multiple layers of closely packed tube bundles spaced apart along a first direction, each layer of the closely packed tube bundles comprising a plurality of tube bodies disposed side by side; a heat charging pipeline connected to the steam inlet pipe; a heat release pipeline comprising a first pipeline and a second pipeline, wherein the first pipeline is connected to the steam outlet pipe, and the second pipeline comprises a first steam pipe and a second steam pipe, wherein the first steam pipe is connected to the steam inlet of the multi-layer close-packed tube bundle, and the second steam pipe is connected to the steam outlet of the multi-layer close-packed tube bundle; The free end of the first pipeline is connected to the steam main pipe through a first check valve, and the hot charging pipeline is connected to the steam main pipe through a second check valve; The first steam pipe is connected to the first pipeline or the steam main pipe; The first steam pipe is connected to the steam inlet of the multi-layer close-packed tube bundle through a steam inlet manifold; The second steam pipe is connected to the steam outlet of the multi-layer close-packed tube bundle through a steam outlet collecting pipe.

2. The superheated steam generating system according to claim 1, characterized in that: The first steam pipe is connected to a pressure regulating valve.

3. The superheated steam generating system according to claim 1, characterized in that: The first steam pipe is also connected to a dehydrator.

4. The superheated steam generating system according to claim 1, characterized in that: The multi-stage composite steam dehydration structure further comprises: a secondary dehydration element, located above the primary dehydration element, the secondary dehydration element comprising a plurality of corrugated plates spaced apart in a horizontal direction; The third-stage dehydration component is located above the second-stage dehydration component. The third-stage dehydration component is composed of a plurality of connected bent orifice plates, and a plurality of perforations are provided on the bent orifice plates.

5. The superheated steam generating system according to claim 4, characterized in that: The multiple tube bodies of each layer of the closely packed tube bundle are arranged side by side along the first direction.

6. The superheated steam generating system according to claim 4, characterized in that: The multiple tubes of the closely packed tube bundles in each layer are staggered along the first direction.

7. The superheated steam generating system according to claim 4, 5 or 6, characterized in that: The first direction is a gravity direction; or, the first direction is a horizontal direction.

8. The superheated steam generating system according to claim 4, characterized in that: The bent orifice plate comprises a first orifice plate and a second orifice plate arranged at an angle, and the first orifice plate and the second orifice plate are both provided with a plurality of the perforations.

9. The superheated steam generating system according to claim 8, characterized in that: The multiple bent orifice plates are connected in a horizontal direction, and at least one drainage hole is provided between two adjacent bent orifice plates. The drainage hole is connected to a first drainage pipe, which includes a vertical pipe and a U-shaped pipe connected to the lower end of the vertical pipe. The upper end of the vertical pipe is connected to the drainage hole.

10. The superheated steam generating system according to claim 9, characterized in that: The second drainage pipeline is connected below the at least one drainage hole, and the second drainage pipeline is connected to the plurality of first drainage pipelines.

11. The superheated steam generating system according to claim 9 or 10, characterized in that: The horizontal height of the connection position between the first orifice plate and the second orifice plate is higher than the horizontal height of the drainage hole.

12. The superheated steam generating system according to claim 7, characterized in that: The plurality of bent orifice plates are arranged in a vertical direction, and the plurality of bent orifice plates are arranged to form a cylindrical structure.

13. The superheated steam generating system according to claim 4, characterized in that: The tube body is a cylindrical tube body.

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