A multi-stage steam-water separation steam supply unit

Abstract

This invention discloses a multi-stage steam-water separation unit, belonging to the field of steam-water separation technology. It includes a steam separator, a cooling inlet assembly, a cyclone rotator, and a terminal centrifuge chamber. The steam separator has a primary separation section, a secondary separation section, and a top guide section from bottom to top. The primary separation section contains an initial blocking assembly composed of a filter screen and a rotating guide cone. Between the primary and secondary separation sections is a double-layered variable-diameter intermediate centrifuge cylinder, whose inner cavity forms a necking acceleration zone and a volume expansion separation zone through its inner convex cylinder wall. Between the secondary and top guide sections is a steam concentrator, with a vortex guide vane with a guide impeller and an output impeller at its inner axis, realizing active extraction and pressurized delivery of gas nuclei. The terminal centrifuge chamber is located on the side edge of the top of the separator and connected to the cyclone rotator. Through multi-stage gradient coordination and active airflow organization, efficient separation from coarse to fine is achieved, significantly improving the capture capability of micron-sized droplets.

Description

Technical Field

[0001] This invention relates to the field of steam-water separation technology, specifically a steam supply unit with multi-stage steam-water separation. Background Technology

[0002] Steam-water separation is a crucial step in industrial production, widely used in thermal power generation, petrochemicals, nuclear engineering, and food and pharmaceutical industries. In these processes, saturated steam generated by boilers often carries a large amount of moisture. If this moisture is directly introduced into downstream equipment such as turbines, reactors, or heat exchangers, it can lead to serious problems such as corrosion, water hammer, reduced thermal efficiency, and even blade damage. Therefore, efficient dehydration of wet steam to obtain high-dryness steam is of paramount importance for ensuring safe equipment operation and improving energy efficiency.

[0003] As modern industry develops towards higher parameters and larger scale, the requirements for steam quality are becoming increasingly stringent. For example, supercritical thermal power units require steam dryness of over 99.99%, and nuclear power secondary loop systems have extremely strict limits on the sodium ion content of steam. Traditional gravity settling steam-water separators rely on the natural settling of droplets by their own weight, resulting in low separation efficiency and large equipment size; baffle separators achieve droplet capture by airflow impacting baffles, but suffer from large pressure drop losses and are not effective at separating fine mist droplets; wire mesh demisters can effectively intercept small droplets, but they are prone to clogging, require frequent maintenance, and are susceptible to secondary liquid film carryover at high flow rates, causing secondary pollution, making it difficult to meet the continuous and stable production requirements of high-dryness steam. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage steam-water separation steam supply unit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A multi-stage steam-water separation steam supply unit includes a steam separator, a cooling air intake assembly, a cyclone rotator and a terminal centrifugal chamber. The steam separator is provided with a primary separation section, a secondary separation section and a top diversion section from bottom to top. A support base is provided at the top of the top diversion section, and the cyclone rotator is mounted on the support base.

[0007] The cooling air intake assembly is located at the bottom of the steam separation vessel and is connected to the primary separation section. It includes a cooling chamber, a cold source supply unit and a steam transport pump. The cooling chamber is connected to the steam transport pump through a spiral feed cylinder. The cooling chamber is provided with an arc-shaped steam inlet and a cooling jacket.

[0008] The primary separation section is equipped with an initial blocking assembly, which includes a water filter screen and a guide cone driven by a drive shaft.

[0009] Between the primary separation section and the secondary separation section is a rotatable intermediate centrifuge tube with a double-layer cylindrical structure. The inner cavity of the intermediate centrifuge tube is formed by the inner convex cylindrical wall into a concave middle chamber and an outwardly expanding lower chamber.

[0010] A steam concentrator is provided between the secondary separation section and the top diversion section. A vortex guide is provided at the internal axis of the device to guide the suspended water vapor located on the outer ring after centrifugal separation in the intermediate centrifuge to move upward to the steam concentrator and to make the water vapor liquefy and flow downward along the inner wall of the inner convex cylinder to the filter screen frame.

[0011] The upper chamber of the intermediate centrifuge tube is equipped with a settling assembly that rotates with it.

[0012] The terminal centrifuge chamber is located on the top side edge of the steam separation vessel. The cyclone rotator introduces airflow into the terminal centrifuge chamber through a pipe. The top of the terminal centrifuge chamber is equipped with a steam exhaust section, and the bottom is equipped with a liquid drain section.

[0013] As a further aspect of the present invention: the spiral feed cylinder has an internal shaft, and a spiral blade is installed on the internal shaft;

[0014] The cold source supply is located on the side of the cooling chamber and is equipped with a refrigerant exchange pump. The cold source supply is connected to the cooling jacket to form a cooling source.

[0015] As a further aspect of the present invention: a base plate is provided at the bottom of the primary separation section;

[0016] The filter screen divides the internal space of the primary separation section into an air intake zone and a filtration zone. The arc-shaped steam inlet is located on the side edge of the air intake zone, and the air intake zone is connected to a drainage channel.

[0017] The drive shaft is installed at the midpoint of the base plate and supports the filter screen frame. The guide cone is in the shape of a bucket cone, installed on the shaft end of the drive shaft and can rotate. The bottom of the drive shaft is connected to an external drainage channel.

[0018] As a further aspect of the present invention: the intermediate centrifuge tube includes an outer shell and an inner convex wall;

[0019] The inner convex cylinder wall protrudes inward, so that the inner cavity of the intermediate centrifuge tube is divided into an upper chamber, a middle chamber and a lower chamber from top to bottom. The inner cavity of the middle chamber is narrowed to form an airflow acceleration zone, and the space of the lower chamber is expanded to form a water vapor expansion and separation zone.

[0020] As a further aspect of the present invention: the settling component includes:

[0021] Circulation drop plate;

[0022] Hub support bracket for supporting the circulation drop plate;

[0023] An arc-shaped positioning plate is provided on the side edge of the circulating drop plate. Several arc-shaped positioning plates are provided and arranged along the outer periphery of the top of the circulating drop plate to fix it to the inner wall of the inner convex cylinder.

[0024] Several suspension rods are installed at equal angles on the arc-shaped positioning plate, and a settling diverter is suspended by the suspension rods.

[0025] As a further aspect of the present invention: each settling diverter includes a hanging rod, a connecting end disposed at the bottom of the hanging rod, and a diverting block installed at the bottom of the connecting end;

[0026] The guide block is provided with several guide blades, which face the inner wall of the inner convex cylinder wall to guide the water droplets separated by centrifugation to fall onto the inner convex cylinder wall.

[0027] As a further aspect of the present invention: the steam concentrator includes a gas collecting chamber and a gas guide pipe installed on the gas collecting chamber, the gas guide pipe being connected to the cyclone rotator to form a top air intake channel;

[0028] A support ring is provided around the gas collecting chamber, and the support ring is supported on the inner wall of the steam separation vessel.

[0029] The air inlet end of the air guide pipe is equipped with several defoaming baffles, and the air outlet end of the air guide pipe is equipped with an exhaust hole, which is guided to the cyclone rotator.

[0030] As a further aspect of the present invention: the vortex guide includes a long shaft, which is disposed through the air guide tube;

[0031] The long shaft is driven to rotate within the gas collecting chamber via a gear side wing.

[0032] After the intermediate centrifuge tube spirals and splits the airflow, the airflow is located at the center line while the suspended water vapor is located at the outer ring.

[0033] The long shaft is configured such that: its bottom impeller helps guide the suspended water vapor to move upward to the steam concentrator, and its top output impeller helps guide the airflow to the cyclone rotator.

[0034] As a further embodiment of the present invention: the bottom end of the long shaft extends to the upper center line of the settling assembly and is provided with a flow guide impeller, and the top of the long shaft is provided with an output impeller at the exhaust port.

[0035] As a further embodiment of the present invention: the side edge of the secondary separation section is provided with a side wing drive to drive the intermediate centrifuge tube to rotate.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] This invention constructs a multi-stage gradient coordinated steam-water separation system. A cooling air intake assembly with a spiral feed cylinder is integrated at the air inlet front end. A jacketed cooling structure pre-cools and condenses the wet steam, achieving source removal of coarse droplets. In the primary separation section, an initial blocking component consisting of a rotating guide cone and a filter screen is installed. This combination of dynamic disturbance and filtration interception enhances the separation effect of gravity and filtration. In the intermediate centrifuge, a unique double-layer variable-diameter cylinder wall structure is designed, creating an "acceleration-expansion" flow channel variation. A settling component rotating with the cylinder is added, utilizing a secondary coalescence mechanism in the centrifugal force field to forcibly guide fine droplets to the wall surface for liquefaction and recovery. Finally, a vortex guide with a guide impeller and an output impeller is configured in the steam concentrator, achieving active pneumatic separation and pressurized transport of dry steam and suspended water vapor.

[0038] The system achieves a gradient separation path from coarse to fine and from passive to active, which greatly improves the capture capability of micron-sized droplets, avoids secondary carryover, and significantly improves separation efficiency and steam dryness. At the same time, the dynamic and active structural design enhances the equipment's anti-clogging ability and operational stability, and can meet the stringent requirements of high-end industrial applications for extremely high-quality steam.

[0039] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0041] Figure 1 This is a schematic diagram of the overall structure of a multi-stage steam supply unit with steam-water separation provided in an embodiment of the present invention.

[0042] Figure 2 This is a cross-sectional structural diagram of the steam separation vessel provided in an embodiment of the present invention.

[0043] Figure 3 This is a cross-sectional structural diagram of the cooling intake assembly provided in an embodiment of the present invention.

[0044] Figure 4 This is a schematic diagram of the structure of an intermediate centrifuge tube provided in an embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of the structure of the settling component provided in an embodiment of the present invention.

[0046] Figure 6 For the present invention Figure 5 An enlarged schematic diagram of region A in the middle.

[0047] Figure 7 This is a schematic diagram of the steam centralization device provided in an embodiment of the present invention.

[0048] In the diagram: 1. Steam separator; 2. Cooling inlet assembly; 3. Cyclone rotator; 4. Terminal centrifuge chamber; 5. Intermediate centrifuge cylinder; 6. Settling assembly; 7. Settling guide; 8. Steam concentrator; 9. Rotary vane guide; 10. Initial barrier assembly; 11. Primary separation section; 12. Secondary separation section; 13. Top guide section; 14. Support base; 21. Connecting conduit; 22. Cooling chamber; 23. Spiral feed cylinder; 24. Cold source supplier; 25. Steam transfer pump; 41. Exhaust section; 42. Drainage section; 51. Outer shell; 52. Inner convex wall; 53. Upper chamber; 54. Middle chamber; 55. Lower chamber; 61. Hub support frame; 62. Circulating drop plate; 63. Arc-shaped positioning plate; 64. Suspension support rod; 71. Hanging rod; 72. Connecting end; 73. Guide block; 74. Guide vane; 81. Gas collection chamber; 82. Support ring; 83. Demister baffle; 84. Air guide pipe; 85. Exhaust port; 91. Long shaft; 92. Guide impeller; 93. Output impeller; 101. Water filter screen frame; 102. Drive shaft; 103. Guide cone; 111. Base plate; 112. Air inlet area; 113. Filtering area; 121. Side wing drive frame; 221. Cooling jacket; 222. Arc-shaped steam inlet; 231. Inner shaft; 232. Wire spiral vane; 241. Refrigerant exchange pump. Detailed Implementation

[0049] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, examples of which are illustrated in the drawings. In the following description relating to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or identical elements.

[0050] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0051] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0052] Example 1, please refer to Figure 1 and Figure 2A multi-stage steam supply unit for steam-water separation is provided, comprising a steam separator 1, a cooling air intake assembly 2, a cyclone rotator 3, and a terminal centrifuge chamber 4. The steam separator 1, as the main separation vessel, adopts a bottom-intake, top-exhaust process. Its shell contains, from bottom to top, a primary separation section 11, a secondary separation section 12, and a top guide section 13. A support base 14 is fixedly mounted on the top shell of the top guide section 13, and the cyclone rotator 3 is mounted and fixed on this support base 14. The terminal centrifuge chamber 4 is installed on the top side edge of the steam separator 1. The cyclone rotator 3 introduces pre-purified steam into the terminal centrifuge chamber 4 through a pipe. The top of the terminal centrifuge chamber 4 has an exhaust section 41 for outputting dry steam, and the bottom has a drain section 42 for discharging the separated residual liquid.

[0053] Please see Figure 3 The cooling air intake assembly 2 is located at the bottom of the steam separation vessel 1 and is connected to the side wall of the primary separation section 11. The specific structure of the cooling air intake assembly 2 includes a cooling chamber 22, a cold source supply unit 24, and a steam transfer pump 25. The steam transfer pump 25 is externally connected to a connecting conduit 21 for introducing wet steam from the outside. The cooling chamber 22 and the steam transfer pump 25 are connected by a spiral feed cylinder 23, which contains an internal shaft 231 on which spiral blades 232 are mounted. The cooling chamber 22 itself is a box structure, with an arc-shaped steam inlet 222 along its inner edge that matches the structure of the primary separation section 11. Through this arc-shaped steam inlet 222, the inner cavity of the cooling chamber 22 communicates with the inner cavity of the primary separation section 11. A cooling jacket 221 is also provided inside the shell of the cooling chamber 22. The cooling jacket 221 wraps around the spiral feed cylinder 23 and the arc-shaped steam inlet 222, forming a jacketed cooling structure. The cold source supply 24 is located on the side edge of the cooling chamber 22 and is equipped with a refrigerant exchange pump 241. The cold source supply 24 is connected to the cooling jacket 221 through pipelines to circulate and supply cooling medium to it, forming a stable cooling source.

[0054] A base plate 111 is provided at the bottom of the primary separation section 11, and an initial blocking assembly 10 is installed on the base plate 111. The initial blocking assembly 10 includes a water filter frame 101, a drive shaft 102, and a guide cone 103. The water filter frame 101 is a semi-cylindrical frame that divides the internal space of the primary separation section 11 into a lower air intake zone 112 and an upper filtration zone 113. The aforementioned arc-shaped steam inlet 222 is located on the side edge of the air intake zone 112, allowing wet steam to enter the air intake zone 112 first. The drive shaft 102 is fixedly installed at the midpoint of the base plate 111 and extends upward to support the water filter frame 101. The guide cone 103 is a cone-shaped structure, installed at the shaft end of the drive shaft 102 and located within the frame space of the water filter frame 101. The drive shaft 102 can drive the guide cone 103 to rotate. The bottom of the air intake area 112 is connected to a drainage channel for discharging the initially separated liquid. The bottom of the drive shaft 102 is also connected to a drainage channel.

[0055] Please see Figure 4 A secondary centrifuge tube 5 is disposed between the top of the primary separation section 11 and the secondary separation section 12. A side-wing drive mounting frame 121 is disposed along the side edge of the secondary separation section 12, and a drive mechanism is installed within this frame to drive the secondary centrifuge tube 5 to rotate around its axis. The secondary centrifuge tube 5 is designed as a double-layered structure, including an outer shell 51 and an inner convex wall 52. The inner convex wall 52 protrudes inward, forming three chambers from top to bottom within the secondary centrifuge tube 5: an upper chamber 53, a middle chamber 54, and a lower chamber 55. The middle chamber 54 has a constricted inner cavity forming a necked section, serving as an airflow acceleration zone; the lower chamber 55 expands outward relative to the middle chamber 54, forming an expanded separation zone.

[0056] A steam concentrator 8 is installed between the secondary separation section 12 and the top guide section 13. This device is used to collect the airflow after intermediate centrifugal separation and guide it into the cyclone rotator 3. A swirl vane guide 9 is installed at the axial position inside the steam concentrator 8 to assist in guiding the separation and directional flow of airflow and suspended water vapor.

[0057] During operation, external wet steam is first drawn in by the steam transport pump 25 through the connecting conduit 21 and pushed to the screw feed cylinder 23. Inside the screw feed cylinder 23, the wet steam is transported forward along the spiral channel formed by the inner shaft 231 and the spiral blades 232. During this process, the steam is in full contact with the wall of the spiral channel. Because the cold source supplier 24 continuously supplies refrigerant to the cooling jacket 221, the wall temperature of the screw feed cylinder 23 is low, and some of the water vapor in the wet steam condenses initially upon cooling, achieving the first stage of cooling and condensation separation. The steam that has undergone preliminary cooling then enters the air inlet zone 112 of the primary separation section 11 through the arc-shaped steam inlet 222.

[0058] Within the intake zone 112, the steam flow, driven by the drive shaft 102, is disturbed and guided by the rotating guide cone 103. Large water droplets in the flow are thrown out by centrifugal force and gravity, falling to the bottom of the intake zone 112 and being discharged through the drainage channel. Subsequently, the flow passes upward through the filter screen 101. The mesh structure of the filter screen 101 intercepts and coalesces residual water droplets in the flow, further removing moisture. After initial separation by the initial blocking component 10, the relatively dry steam enters the filtration zone 113 and then rises into the lower chamber 55 of the intermediate centrifuge cylinder 5.

[0059] Upon entering the intermediate centrifuge chamber 5, the steam flow undergoes a spiral motion due to the high-speed rotation of the chamber driven by the side-wing drive mounting frame 121, causing the steam to flow in a spiral motion under centrifugal force. Due to the density difference between the gas and liquid phases, the heavier suspended water vapor is thrown towards the inner wall of the convex chamber wall 52, while the lighter dry steam is relatively concentrated at the center line. As the airflow moves upward, it passes through the constricted intermediate chamber 54, where the airflow channel narrows, the flow velocity increases, and the centrifugal separation effect is further enhanced. Upon entering the upper chamber 53, the space expands again, the airflow velocity decreases, and this facilitates the liquefaction and downward flow of the water vapor thrown to the wall under gravity. The downward-flowing liquid eventually returns to the filter screen 101 and is discharged through the drainage channel at the bottom of the drive shaft 102.

[0060] The rising airflow (mainly dry steam and a small amount of partially separated suspended water vapor) from the upper chamber 53 of the intermediate centrifuge 5 enters the steam concentrator 8. Guided by the vortex guide vane 9, the suspended water vapor in the airflow is further directed to the periphery, while the dry steam is concentrated in the central area and enters the cyclone rotator 3 through the air guide pipe. After final cyclone separation in the cyclone rotator 3, the extremely dry steam is introduced into the end centrifuge chamber 4 and discharged for use through the top exhaust section 41. The small amount of liquid discharged from the bottom drain section 42 of the end centrifuge chamber 4 is collected and processed.

[0061] This embodiment comprehensively utilizes a multi-stage separation strategy, including low-temperature condensation pre-separation in the cooling intake assembly 2, gravity and filtration separation in the initial blocking component 10, strong centrifugal separation in the intermediate centrifuge tube 5, and guided collection separation in the steam concentrator 8. Each stage targets and removes droplets of different sizes and states, forming a gradient separation path from coarse to fine and from large to small. In particular, the intermediate centrifuge tube 5 adopts a double-layer structure and is designed with an inner convex cylinder wall 52, forming an "acceleration-expansion" flow channel change, which effectively enhances the centrifugal separation effect and promotes the convergence and downward movement of the liquid film. By integrating the cooling air intake assembly 2 with the spiral feed cylinder 23, pre-cooling and initial separation are performed before the steam enters the main separation vessel, significantly reducing the heat load of the main separation section. The initial blocking assembly 10 uses a rotating guide cone 103 in conjunction with the water filter frame 101, which not only avoids the problem of easy clogging of traditional filter screens, but also improves the separation efficiency through dynamic disturbance. The double-layer structure and variable diameter design of the intermediate centrifuge cylinder 5 extend the airflow path and increase the number of separations without significantly increasing the size of the equipment, thus significantly improving the processing capacity and separation accuracy per unit time.

[0062] Example 2: Based on Example 1, this example further optimizes the internal structure of the intermediate centrifuge tube 5. For example... Figure 4 and Figure 5 As shown, a settling assembly 6 is also installed in the upper chamber 53, which rotates synchronously with the rotation of the intermediate centrifuge cylinder 5. The specific structure of the settling assembly 6 includes a circulating drop plate 62, a hub support frame 61, and an arc-shaped positioning plate 63. The hub support frame 61 is located in the center and is used to support the circulating drop plate 62, which is arranged in a ring. Several arc-shaped positioning plates 63 are provided, evenly distributed along the top periphery of the circulating drop plate 62, and are used to fix the entire settling assembly 6 to the inner wall of the inner convex cylinder wall 52. Several suspension rods 64 are installed at equal angles on each arc-shaped positioning plate 63, and the settling guide 7 is suspended through these suspension rods 64.

[0063] Please see Figure 7 Each settling diverter 7 includes a hanging rod 71, a connecting end 72 located at the bottom of the hanging rod 71, and a guide block 73 installed at the bottom of the connecting end 72. The guide block 73 has several guide blades 74, all of which point towards the inner wall of the inner convex cylinder wall 52.

[0064] The main difference between this embodiment and Embodiment 1 lies in the flow field and droplet trajectory within the intermediate centrifuge tube 5. When the airflow carrying suspended water vapor rotates and rises within the intermediate centrifuge tube 5, it first comes into contact with the settling assembly 6, which rotates synchronously with the tube. The circulating drop plate 62 provides some obstruction and guidance to the rising airflow, creating local vortices and increasing the probability of collisions between water vapor droplets and between droplets and the wall. More importantly, the guide vanes 74 on the guide block 73 of the suspended settling guide 7 create micro-disturbances in the surrounding flow field under the action of centrifugal force. Tiny droplets that have been flung towards the inner convex tube wall 52 by centrifugal force but have not yet adhered are more effectively guided to the inner convex tube wall 52 by the guide vanes 74. Once the droplets contact the wall, they flow down the wall or are captured by the guide vanes 74 and converge into larger droplets before falling.

[0065] The settling component 6 introduces a "secondary coalescence" mechanism into the centrifugal force field. In traditional centrifugal separation, fine droplets may have difficulty adhering effectively to the wall surface due to airflow disturbance. In this embodiment, a settling guide 7 that rotates with the cylinder is specifically designed with its guide vanes 74 pointing towards the wall, forming a directional "pneumatic delivery" channel that actively "pushes" the suspended fine droplets to the wall surface. At the same time, the suspended installation allows the settling guide 7 to have a certain degree of micro-oscillation during operation. This micro-oscillation helps to disrupt the surface tension balance of the droplets, promoting their coalescence and growth.

[0066] The addition of sedimentation component 6 significantly enhances the ability of the intermediate centrifuge tube 5 to capture micron- and submicron-sized fine droplets, further improving the overall separation efficiency. The mechanical diversion structure solves the technical challenge of "difficulty in removing fine mist" in traditional centrifugal separation. Simultaneously, the suspended design of the sedimentation diverter 7 provides it with a certain degree of self-cleaning capability, preventing efficiency degradation due to contaminant buildup after long-term operation.

[0067] Example 3: Based on the above examples, this example refines the design of the steam concentrator 8 and its internal rotary vane guide 9. For example... Figure 7 As shown, the steam concentrator 8 includes a gas collecting chamber 81 and a gas guide pipe 84 installed on the top of the gas collecting chamber 81. The gas guide pipe 84 is connected to the cyclone rotator 3 to form a top air intake channel. A support ring 82 is provided around the gas collecting chamber 81, which supports the entire steam concentrator 8 against the inner wall of the steam separation vessel 1. Several defoaming baffles 83 are provided at the air inlet end (i.e., the lower end) of the gas guide pipe 84, and an exhaust port 85 is provided at the air outlet end (i.e., the upper end) of the gas guide pipe 84, which leads to the cyclone rotator 3.

[0068] The swirl guide 9 includes a long shaft 91 that extends through the interior of the air guide tube 84. The long shaft 91 is driven to rotate within the air collection chamber 81 by a gear-driven side-wing mechanism (not shown). The bottom end of the long shaft 91 extends downward to the upper centerline of the settling assembly 6, where a guide impeller 92 is located. The top end of the long shaft 91 extends to the exhaust port 85 of the air guide tube 84, where an output impeller 93 is located.

[0069] The working process of this embodiment demonstrates precise airflow organization. The rising airflow (containing dry steam and a small amount of suspended water vapor) from the intermediate centrifuge 5 first enters the gas collecting chamber 81. Inside the gas collecting chamber 81, due to the rotation of the guide impeller 92 driven by the long shaft 91, a low-pressure zone is formed at the center line, inducing the airflow to converge towards the center. This makes it difficult for the denser suspended water vapor in the outer ring to enter the central airflow channel. On the other hand, the converged central airflow (mainly dry steam) is forced by the guide impeller 92 to the inlet of the guide pipe 84. Before entering the guide pipe 84, the airflow also needs to pass through the defoaming baffle 83, which performs a final interception of residual foam and larger droplets. After entering the guide pipe 84, driven by the rotation of the output impeller 93 at the top of the long shaft 91, the airflow is actively pressurized and guided to the exhaust port 85, and finally enters the cyclone rotator 3 with higher kinetic energy.

[0070] In this embodiment, a long shaft 91 simultaneously drives the bottom intake impeller 92 and the top output impeller 93, constructing a "bottom-in, top-out" active airflow organization system within the steam concentrator 8. The rotation of the intake impeller 92 generates negative pressure in the centerline region, utilizing aerodynamic principles to achieve forced separation of the "gas core" and "water film," a significant improvement over traditional passive collection methods. The output impeller 93 acts as a pressurizer, overcoming the resistance of long-distance delivery pipelines and ensuring that the airflow enters the cyclone rotator 3 at optimal velocity, thereby guaranteeing the efficiency of final-stage separation.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-stage steam supply unit for steam-water separation, comprising a steam separator (1), a cooling air intake assembly (2), a cyclone rotator (3), and an end centrifuge chamber (4). The steam separation vessel (1) is provided with a primary separation section (11), a secondary separation section (12), and a top flow section (13) from bottom to top. A support base (14) is provided on the top of the top flow section (13), and the cyclone rotator (3) is mounted on the support base (14). Its characteristic is that: The cooling air intake assembly (2) is located at the bottom of the steam separation vessel (1) and connected to the primary separation section (11). It includes a cooling chamber (22), a cold source supply device (24), and a steam transport pump (25). The cooling chamber (22) is connected to the steam transport pump (25) through a spiral feed cylinder (23). The cooling chamber (22) is provided with an arc-shaped steam inlet (222) and a cooling jacket (221). The primary separation section (11) is provided with a starting end blocking assembly (10), which includes a water filter frame (101) and a guide cone (103) driven by a drive shaft (102). Between the primary separation section (11) and the secondary separation section (12), there is a rotatable intermediate centrifuge tube (5) with a double-layer cylindrical structure. The inner cavity of the middle section forms a concave middle chamber (54) and an outwardly expanding lower chamber (55) through the inner convex cylinder wall (52). A steam concentrator (8) is provided between the secondary separation section (12) and the top diversion section (13), and a vortex guide (9) is provided at the internal axis of the device to guide the suspended water vapor located on the outer ring after centrifugal separation of the intermediate centrifugal cylinder (5) to move upward to the steam concentrator (8), and to make the water vapor liquefy and flow downward along the inner wall of the inner convex cylinder wall (52) to the filter screen frame (101). The upper chamber (53) of the intermediate centrifuge tube (5) is provided with a settling assembly (6) that rotates with it. The end centrifuge chamber (4) is located on the top side edge of the steam separation vessel (1). The cyclone rotator (3) introduces the airflow into the end centrifuge chamber (4) through the pipe. The top of the end centrifuge chamber (4) is provided with a steam exhaust section (41), and the bottom is provided with a liquid discharge section (42).

2. The multi-stage steam-water separation steam supply unit according to claim 1, characterized in that: The spiral feed cylinder (23) has an internal shaft (231) inside, and a spiral blade (232) is installed on the internal shaft (231). The cold source supply device (24) is located on the side of the cooling chamber (22) and is equipped with a refrigerant exchange pump (241). The cold source supply device (24) is connected to the cooling jacket (221) to form a cooling source.

3. The multi-stage steam-water separation steam supply unit according to claim 1, characterized in that: The bottom of the primary separation section (11) is provided with a base plate (111). The filter screen (101) divides the inner space of the primary separation section (11) into an air intake area (112) and a filtration area (113). The arc-shaped steam inlet (222) is located on the side edge of the air intake area (112), and the air intake area (112) is connected to a drainage channel. The drive shaft (102) is installed at the midpoint of the base plate (111) and supports the filter screen frame (101). The guide cone (103) is in the shape of a bucket cone, installed on the shaft end of the drive shaft (102) and can rotate. The bottom of the drive shaft (102) is connected to an external drainage channel.

4. The multi-stage steam-water separation steam supply unit according to claim 1, characterized in that: The intermediate centrifuge tube (5) includes an outer shell (51) and an inner convex wall (52); The inner convex cylinder wall (52) protrudes inward, so that the inner cavity of the intermediate centrifuge cylinder (5) forms an upper chamber (53), a middle chamber (54) and a lower chamber (55) from top to bottom. The inner cavity of the middle chamber (54) shrinks inward to form an airflow acceleration zone, and the space of the lower chamber (55) expands outward to form a water vapor expansion and separation zone.

5. The multi-stage steam-water separation steam supply unit according to claim 4, characterized in that: The settling assembly (6) includes: Circulation drop plate (62); Hub support bracket (61) for supporting the circulating drop plate (62); An arc-shaped positioning plate (63) is provided on the side edge of the circulation drop plate (62). The arc-shaped positioning plate (63) is provided in several places and arranged along the outer periphery of the top of the circulation drop plate (62) to be fixed to the inner wall of the inner convex cylinder wall (52). Several suspension rods (64) are installed at equal angles on the arc-shaped positioning plate (63), and a settling diverter (7) is suspended through the suspension rods (64).

6. The multi-stage steam-water separation steam supply unit according to claim 5, characterized in that: Each settling diverter (7) includes a hanging rod (71), a connecting end (72) located at the bottom of the hanging rod (71), and a diverting block (73) installed at the bottom of the connecting end (72). The guide block (73) is provided with several guide blades (74), which face the inner wall of the inner convex cylinder wall (52) to guide the water droplets separated by centrifugation to fall onto the inner convex cylinder wall (52).

7. The multi-stage steam-water separation steam supply unit according to claim 1, characterized in that: The steam concentrator (8) includes a gas collection chamber (81) and a gas guide pipe (84) installed on the gas collection chamber (81). The gas guide pipe (84) is connected to the cyclone rotator (3) to form a top air intake channel. A support ring (82) is provided around the gas collecting chamber (81), and the support ring (82) is supported on the inner wall of the steam separation vessel (1); The air inlet end of the air guide pipe (84) is provided with several defoaming baffles (83), and the air outlet end of the air guide pipe (84) is provided with an exhaust hole (85), which is guided to the cyclone rotator (3).

8. The multi-stage steam-water separation steam supply unit according to claim 7, characterized in that: The rotary vane guide (9) includes a long shaft (91), which is disposed inside the air guide tube (84); The long shaft (91) is driven to rotate within the gas collecting chamber (81) by a gear side wing; After the intermediate centrifuge tube (5) spirally splits the airflow, the airflow is located at the center line position while the suspended water vapor is located at the outer ring position; The long shaft (91) is configured such that: its bottom impeller (92) assists in guiding the suspended water vapor upward to the steam concentrator (8), and its top output impeller (93) assists in guiding the airflow to the cyclone rotator (3).

9. The multi-stage steam-water separation steam supply unit according to claim 8, characterized in that: The bottom end of the long shaft (91) extends to the upper center line of the settling assembly (6) and is provided with a diversion impeller (92). The top of the long shaft (91) is provided with an output impeller (93) at the exhaust port (85).

10. The multi-stage steam-water separation steam supply unit according to claim 1, characterized in that: The secondary separation section (12) is provided with a side wing drive along its side to drive the intermediate centrifuge tube (5) to rotate.

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