Steam supercharging device for steam turbine

Abstract

The utility model relates to the technical field of steam turbines, one embodiment of the utility model provides a steam supercharging device for a steam turbine, the steam supercharging device comprises a supercharging tank, a discharging pipe is arranged at the tail end of the supercharging tank, a supercharging constant temperature assembly is arranged in the supercharging tank, and a feeding adjusting assembly is arranged on the side wall of the supercharging tank; the pressurizing constant-temperature assembly comprises a conical pipe, a constant-temperature cover is arranged outside the conical pipe, a constant-temperature frame is arranged on the side wall of the constant-temperature cover and fixedly connected with the inner side wall of the pressurizing tank, a heating resistor disc is arranged in the constant-temperature cover, and a heat conducting piece is arranged on the side wall of the conical pipe. By means of the technical scheme, the problems that in the prior art, a traditional coping mode has many defects, some enterprises adopt high-energy steam to be matched with externally-supplied steam parameters through temperature and pressure reduction measures, however, great loss can be generated in the throttling process of a direct temperature and pressure reduction device, steam heat energy cannot be utilized in a gradient mode, and energy consumption is reduced are solved. And serious energy waste is caused.

Description

A steam booster device for steam turbines Technical Field

[0001] The embodiments disclosed herein relate to the field of steam turbine technology, and more specifically, to a steam booster device for a steam turbine. Background Technology

[0002] In modern industrial production, steam turbines are an important power equipment widely used in power generation, chemical industry, metallurgy and other fields. The operation of steam turbines depends on a stable supply of steam that meets specific parameter requirements. The pressure and temperature of the steam directly affect the working efficiency and output power of the steam turbine.

[0003] With the continuous expansion of industrial scale and the increasing complexity of production processes, the actual operating conditions require more and more diverse steam parameters. On the one hand, during the steam generation and transmission process, the steam pressure and temperature will drop to varying degrees due to factors such as pipeline resistance and heat dissipation. For example, in long-distance steam transmission pipelines, pressure drop and temperature drop are significant. This not only causes a huge waste of energy, but may also cause the steam parameters to fail to meet the actual steam requirements of users. On the other hand, the initial steam quality produced by some steam sources is low. For example, although nuclear power units have a large steam output, their steam quality is relatively poor compared to coal-fired steam supply, making it difficult to directly transmit over long distances or meet certain production processes with stringent requirements for steam parameters.

[0004] Traditional solutions have many drawbacks. Some companies use high-energy steam extraction and de-cooling / pressure reduction measures to match the parameters of externally supplied steam. However, the throttling process of this direct de-cooling / pressure reduction device generates significant heat loss, resulting in the failure to achieve cascade utilization of steam thermal energy and causing serious energy waste. Another method is to reduce heat loss during high-temperature steam transportation by thickening the pipe insulation. Although this can alleviate the temperature drop problem to some extent, it has limited effect on fundamentally improving pressure drop and low-quality steam. In addition, the technical solution of using high-pressure driven steam to extract low-pressure steam through nozzles can achieve cascade utilization of high-pressure steam thermal energy, but due to the strong mixing process within the device, there is a large irreversible flow loss, resulting in low energy efficiency.

[0005] To effectively solve the above problems, meet the stringent requirements of industrial production for steam parameters, and improve energy utilization efficiency, it is particularly urgent to develop a high-efficiency and reliable steam booster device for steam turbines. Summary of the Invention

[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a steam booster device for steam turbines, which solves the many drawbacks of the traditional methods in the prior art. Some enterprises use high-energy steam to match the external steam parameters by extracting high-energy steam and reducing pressure. However, the throttling process of this direct de-heating and pressure reducing device will generate a lot of energy loss, resulting in the failure to realize the cascade utilization of steam thermal energy and causing serious energy waste.

[0007] According to one aspect, at least one embodiment of this disclosure provides a steam booster device for a steam turbine, comprising:

[0008] A pressure tank, wherein a discharge pipe is provided at the end of the pressure tank;

[0009] A pressurization and temperature control assembly is disposed inside the pressurization tank;

[0010] An adjustable feed assembly is disposed on the side wall of the pressurization tank;

[0011] The pressurization and temperature control assembly includes a conical tube embedded inside the pressurization tank. A temperature control cover is provided on the outside of the conical tube. A temperature control frame is provided on the side wall of the temperature control cover. The temperature control frame is fixedly connected to the inner side wall of the pressurization tank. A heating resistance sheet is provided inside the temperature control cover. A heat-conducting sheet is provided on the side wall of the conical tube.

[0012] As a further technical solution, the lower end face of the pressurization tank has an operating port, and an extension tube is provided on the operating port, the extension tube being connected to the operating port.

[0013] As a further technical solution, the adjusting feed assembly includes a feed pipe, which is inserted into the side wall of the pressurizing tank. The side wall of the feed pipe is provided with a mounting frame, and the mounting frame is provided with a sliding wheel. The inner side wall of the pressurizing tank is provided with a feed hood, which has an expansion opening. The sliding wheel is in contact with the inner side wall of the feed hood.

[0014] As a further technical solution, the feed pipe is provided with a screw thread, which is bolted to the pressurization tank. A sealing ring is provided on the side wall of the feed pipe, and the sealing ring is sealed to the feed pipe.

[0015] As a further technical solution, one end of the discharge pipe is inserted into the interior of the pressurization tank, and the discharge pipe and the conical pipe are sealed together.

[0016] As a further technical solution, the inner diameter of the feed pipe is larger than the inner diameter of the discharge pipe, the feed pipe and the discharge pipe are positioned correspondingly, and the feed pipe and the discharge pipe are located at opposite ends of the pressurization tank.

[0017] As a further technical solution, the heat-conducting sheet is made of metal, and the constant temperature cover has a number of heat-conducting holes, with the heat-conducting sheet embedded in the heat-conducting holes.

[0018] As a further technical solution, a temperature-regulating sleeve is provided on the temperature-regulating frame, and the temperature-regulating sleeve is fixedly fitted onto the tapered tube.

[0019] The beneficial effects of the embodiments disclosed herein are as follows:

[0020] 1. In this disclosure, the conical tube in the pressurization and thermostatic assembly uses a cross-sectional shrinkage design (the tube diameter gradually decreases along the steam flow direction) to increase the steam velocity and convert static pressure energy into kinetic energy through the "Venturi effect" in fluid mechanics, thereby achieving the purpose of pressurization. At the same time, the thermostatic cover outside the conical tube has a built-in heating resistance sheet, which is tightly attached to the conical tube through a heat-conducting sheet (metal material) to efficiently conduct heat to the steam path, avoid the steam temperature drop due to energy loss during the pressurization process, ensure that the steam is maintained within the target parameter range, and reduce energy waste caused by temperature drop.

[0021] 2. In this disclosure, the heat-conducting holes on the constant temperature cover are embedded with the heat-conducting sheet to form a dense heat conduction path, so that the heat generated by the heating resistor is evenly distributed on the surface of the conical tube, avoiding local overheating or uneven temperature. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0023] Figure 1 is a schematic diagram of a structure in one embodiment of this disclosure;

[0024] Figure 2 is a cross-sectional view of the pressurization tank of this disclosure;

[0025] Figure 3 is a cross-sectional view of the thermostatic enclosure of this disclosure;

[0026] Figure 4 is an isometric view of the feed hood of this disclosure;

[0027] In the diagram: 1. Pressure tank; 2. Discharge pipe; 3. Pressure-boosting and temperature-regulating assembly; 3-1. Conical tube; 3-2. Temperature-regulating hood; 3-3. Temperature-regulating frame; 3-4. Heating resistance element; 3-5. Heat-conducting plate; 3-6. Operating port; 3-7. Extension tube; 4. Adjustable feed assembly; 4-1. Feed pipe; 4-2. Mounting frame; 4-3. Sliding wheel; 4-4. Feed hood; 4-5. Expansion port; 4-6. Tightening thread; 4-7. Sealing ring; 5. Heat-conducting hole; 6. Temperature-regulating sleeve. Detailed Implementation

[0028] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0029] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0030] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0031] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] As shown in Figures 1-4, a steam booster device for a steam turbine according to this disclosure includes:

[0035] Pressure tank 1, with a discharge pipe 2 installed at its end;

[0036] The pressurization and temperature control component 3 is installed inside the pressurization tank 1;

[0037] Adjust the feed assembly 4, which is located on the side wall of the pressure tank 1;

[0038] The pressurization and temperature control assembly 3 includes a conical tube 3-1, which is embedded inside the pressurization tank 1. A temperature control cover 3-2 is provided on the outside of the conical tube 3-1. A temperature control frame 3-3 is provided on the side wall of the temperature control cover 3-2. The temperature control frame 3-3 is fixedly connected to the inner side wall of the pressurization tank 1. A heating resistance sheet 3-4 is provided inside the temperature control cover 3-2. A heat-conducting sheet 3-5 is provided on the side wall of the conical tube 3-1.

[0039] The adjusting feed assembly 4 includes a feed pipe 4-1, which is inserted into the side wall of the pressurizing tank 1. A mounting frame 4-2 is provided on the side wall of the feed pipe 4-1, and a sliding wheel 4-3 is provided on the mounting frame 4-2. A feed hood 4-4 is provided on the inner side wall of the pressurizing tank 1, and an expansion port 4-5 is opened on the feed hood 4-4. The sliding wheel 4-3 is in contact with the inner side wall of the feed hood 4-4.

[0040] In some examples, a suitable installation location is selected to ensure that the pressure tank 1 can be placed stably. The pressure tank 1 is then secured to prevent displacement or shaking during operation. The conical tube 3-1 is carefully inserted into the pressure tank 1, ensuring its accurate positioning. The thermostatic cover 3-2 is then placed over the conical tube 3-1, ensuring proper relative positioning. The thermostatic cover 3-2 is then fixedly connected to the inner wall of the pressure tank 1 using a thermostatic bracket 3-3, which can be achieved through welding or bolting to ensure a secure connection. 2. Install heating resistors 3-4 inside the tube. Ensure that the heating resistors 3-4 are evenly distributed to ensure uniform heating of the tapered tube 3-1. Install heat-conducting plates 3-5 on the side wall of the tapered tube 3-1 and embed them into the heat-conducting holes 5 on the thermostatic cover 3-2 to ensure good heat conduction. The heat-conducting plates 3-5 are made of metal, such as copper or aluminum, to improve heat conduction efficiency. Install thermostatic sleeves 6 on the thermostatic frame 3-3 and fix them on the tapered tube 3-1 to further enhance the thermostatic effect.

[0041] Insert the feed pipe 4-1 into the side wall of the pressure tank 1, ensuring a tight connection between the feed pipe 4-1 and the pressure tank 1. Install a mounting bracket 4-2 on the side wall of the feed pipe 4-1, and install a sliding wheel 4-3 on the mounting bracket 4-2 to ensure that the sliding wheel 4-3 can rotate freely. Install the feed hood 4-4 on the inner side wall of the pressure tank 1, so that the expansion port 4-5 on the feed hood 4-4 faces the feed pipe 4-1. Adjust the position of the feed hood 4-4 so that the sliding wheel 4-3 and the feed hood 4-4 are aligned. The inner wall of the feed pipe 4-1 is in contact with the feed pipe 4-2 and slides smoothly. The feed pipe 4-1 is machined with screw threads 4-6 and bolted to the pressurization tank 1 through screw threads 4-6 to ensure a firm connection and allow for disassembly and adjustment as needed. One end of the discharge pipe 2 is inserted into the interior of the pressurization tank 1 and sealed with the conical pipe 3-1. Sealing can be achieved by using sealant or sealing rings. The connection position of the discharge pipe 2 and the conical pipe 3-1 must be accurate to ensure that steam can be discharged smoothly.

[0042] Open the valve on the feed pipe 4-1, and the steam enters the pressure tank 1 through the feed pipe 4-1. Since the sliding wheel 4-3 on the feed pipe 4-1 is in contact with the inner wall of the feed hood 4-4, and the feed hood 4-4 has an expansion port 4-5, the steam can be initially guided and diffused when it enters the pressure tank 1, making the steam distribution more uniform.

[0043] As shown in Figures 1 to 4, this embodiment proposes that the lower end face of the pressurization tank 1 has an operation port 3-6, and an extension pipe 3-7 is provided on the operation port 3-6, which is connected to the operation port 3-6.

[0044] In some examples, the operating port 3-6 is used to clean dust and impurities inside the pressurization tank 1, and a sealing plug can be inserted into the extension tube 3-7 for sealing.

[0045] For example, as shown in Figure 4, the feed pipe 4-1 is provided with a screw thread 4-6, which is bolted to the pressure tank 1. The side wall of the feed pipe 4-1 is provided with a sealing ring 4-7, which is sealed to the feed pipe 4-1.

[0046] In some examples, depending on actual needs, the insertion depth of the feed pipe 4-1 into the side wall of the pressure tank 1 can be adjusted by screwing the screw thread 4-6 on the feed pipe 4-1, thereby adjusting the steam feed rate and feed speed. A sealing ring 4-7 is fitted on the side wall of the feed pipe 4-1. The sealing ring 4-7 is made of sealing materials such as rubber to ensure the sealing performance between the feed pipe 4-1 and the pressure tank 1 and prevent steam leakage.

[0047] For example, as shown in Figure 2, one end of the discharge pipe 2 is inserted into the interior of the pressure tank 1. The discharge pipe 2 is sealed and connected to the conical pipe 3-1. The inner diameter of the feed pipe 4-1 is larger than the inner diameter of the discharge pipe 2. The feed pipe 4-1 and the discharge pipe 2 are positioned opposite each other and are located at opposite ends of the pressure tank 1.

[0048] In some examples, when the steam pressure and temperature in the booster tank 1 reach the set value, the valve on the discharge pipe 2 is opened, and the steam is discharged through the discharge pipe 2. Since the discharge pipe 2 is sealed and inserted into the conical pipe 3-1, and the position of the discharge pipe 2 corresponds to the feed pipe 4-1, the steam can form a good flow path in the booster tank 1 and be discharged smoothly.

[0049] For example, as shown in Figure 3, the heat-conducting plate 3-5 is made of metal, and the constant temperature cover 3-2 has several heat-conducting holes 5, with the heat-conducting plate 3-5 embedded in the heat-conducting holes 5.

[0050] In some examples, heat is transferred to the conical tube 3-1 through the thermostatic cover 3-2. Since the heat-conducting plate 3-5 is embedded in the heat-conducting hole 5, it can quickly transfer heat to various parts of the conical tube 3-1 to heat the steam inside the conical tube 3-1.

[0051] For example, as shown in Figure 2, a thermostatic sleeve 6 is provided on the thermostatic rack 3-3, and the thermostatic sleeve 6 is fixedly fitted on the tapered tube 3-1.

[0052] In some examples, the setup of the thermostatic hood 3-2 and the thermostatic sleeve 6 can reduce heat loss and maintain a stable temperature around the conical tube 3-1, thereby achieving constant temperature and pressure of the steam. By controlling the heating power of the heating resistor 3-4, the temperature and pressure of the steam can be adjusted to achieve the required parameters.

[0053] During operation, adjusting the feed assembly 4 is crucial for steam input. The feed pipe 4-1 is inserted into the side wall of the pressure tank 1, and its mounting bracket 4-2 is equipped with a sliding wheel 4-3, which contacts the inner side wall of the feed hood 4-4 installed on the inner side wall of the pressure tank 1. The expansion port 4-5 on the feed hood 4-4 faces the outlet of the feed pipe 4-1. When the valve of the feed pipe 4-1 is opened and steam flows in, the sliding wheel 4-3 can assist in fine-tuning the position of the feed pipe 4-1 to ensure stable steam entry. After passing through the expansion port 4-5 of the feed hood 4-4, the flow cross-sectional area of ​​the steam increases, the velocity decreases, and the pressure distribution becomes more uniform, thereby achieving the initial steam flow within the pressure tank 1. The steam is distributed in stages to create conditions for subsequent pressurization and temperature control. Simultaneously, by adjusting the insertion depth of the feed pipe 4-1 via the screw thread 4-6, the steam feed rate and speed can be changed to meet different operating conditions. The heating resistance element 3-4 in the pressurization and temperature control assembly 3 is the core component for heating. When the power to the heating resistance element 3-4 is turned on, according to Joule's law, current flows through the resistor to generate heat. This heat accumulates inside the temperature control shroud 3-2. Since the temperature control shroud 3-2 encloses the conical tube 3-1 and has heat-conducting holes 5, with heat-conducting plates 3-5 embedded within and tightly fitted to the conical tube 3-1, heat is transferred through the heat-conducting plates 3-5. The heat is rapidly transferred to the conical tube 3-1. The heat-conducting plate 3-5 is made of metal and has good thermal conductivity, which can efficiently transfer heat to all parts of the conical tube 3-1, causing the steam temperature inside the conical tube 3-1 to rise rapidly. The thermostatic rack 3-3 on the side wall of the thermostatic cover 3-2 is fixedly connected to the inner side wall of the pressure tank 1. The thermostatic rack 3-3 is also equipped with a thermostatic sleeve 6, which is tightly fitted onto the conical tube 3-1. The thermostatic cover 3-2, the thermostatic rack 3-3, and the thermostatic sleeve 6 together form a relatively closed heat-insulating space, reducing the loss of heat to the surrounding environment. When the steam temperature rises to a certain level, the heating element is adjusted by the control system. The heating power of the baffle plate 3-4 achieves a dynamic balance between the generated heat and the dissipated heat, thereby maintaining a stable steam temperature around and inside the conical tube 3-1 and achieving a constant temperature effect. The special structure of the conical tube 3-1 plays a role in the pressurization process. As the steam is heated inside the conical tube 3-1, the temperature rises. According to the ideal gas law, in the pressurization tank 1 with a relatively fixed volume (the total volume of steam in the pressurization tank 1 changes little), the increase in gas temperature will lead to an increase in pressure. At the same time, the change in the diameter of the conical tube 3-1 will also have a certain compression effect on the steam, further increasing the steam pressure and achieving steam pressurization.

[0054] Once the steam pressure and temperature in the booster tank 1 reach the set values, the valve of the discharge pipe 2 is opened, and steam begins to be discharged. One end of the discharge pipe 2 is inserted into the booster tank 1 and sealed with the conical pipe 3-1 to ensure that the steam can be smoothly discharged from the conical pipe 3-1. Since the inner diameter of the feed pipe 4-1 is larger than the inner diameter of the discharge pipe 2, this difference in pipe diameter creates a throttling effect during steam discharge, which allows a certain pressure to be maintained during the discharge process, ensuring that the steam is discharged through the discharge pipe 2 at a stable pressure and flow rate and delivered to the steam turbine to meet the steam turbine's operating requirements for steam pressure and flow rate.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A steam booster device for a steam turbine, characterized in that, include: A pressure tank (1) is provided with a discharge pipe (2) at its end; a pressure-boosting and temperature-regulating assembly (3) is provided inside the pressure tank (1); an adjusting feed assembly (4) is provided on the side wall of the pressure tank (1); the pressure-boosting and temperature-regulating assembly (3) includes a conical tube (3-1) embedded inside the pressure tank (1), a temperature-regulating cover (3-2) is provided outside the conical tube (3-1), a temperature-regulating frame (3-3) is provided on the side wall of the temperature-regulating cover (3-2), the temperature-regulating frame (3-3) is fixedly connected to the inner side wall of the pressure tank (1), a heating resistance sheet (3-4) is provided inside the temperature-regulating cover (3-2), and a heat-conducting sheet (3-5) is provided on the side wall of the conical tube (3-1).

2. The steam booster device for a steam turbine according to claim 1, characterized in that, The lower end face of the booster tank (1) has an operation port (3-6), and an extension tube (3-7) is provided on the operation port (3-6). The extension tube (3-7) is connected to the operation port (3-6).

3. The steam booster device for a steam turbine according to claim 1, characterized in that, The regulating feed assembly (4) includes a feed pipe (4-1), which is inserted into the side wall of the pressurizing tank (1). The side wall of the feed pipe (4-1) is provided with a mounting frame (4-2), and a sliding wheel (4-3) is provided on the mounting frame (4-2). The inner side wall of the pressurizing tank (1) is provided with a feed cover (4-4), and an expansion port (4-5) is opened on the feed cover (4-4). The sliding wheel (4-3) is in contact with the inner side wall of the feed cover (4-4).

4. A steam booster device for a steam turbine according to claim 3, characterized in that, The feed pipe (4-1) is provided with a screw thread (4-6), which is bolted to the pressurization tank (1). A sealing ring (4-7) is provided on the side wall of the feed pipe (4-1), and the sealing ring (4-7) is sealed to the feed pipe (4-1).

5. A steam booster device for a steam turbine according to claim 1, characterized in that, One end of the discharge pipe (2) is inserted into the interior of the pressurization tank (1), and the discharge pipe (2) is sealed and connected to the conical pipe (3-1).

6. A steam booster device for a steam turbine according to claim 3, characterized in that, The inner diameter of the feed pipe (4-1) is larger than the inner diameter of the discharge pipe (2). The feed pipe (4-1) and the discharge pipe (2) are positioned opposite each other and are located at opposite ends of the pressurization tank (1).

7. A steam booster device for a steam turbine according to claim 1, characterized in that, The heat-conducting sheet (3-5) is made of metal, and the constant temperature cover (3-2) has a number of heat-conducting holes (5), and the heat-conducting sheet (3-5) is embedded in the heat-conducting holes (5).

8. A steam booster device for a steam turbine according to claim 1, characterized in that, A thermostatic sleeve (6) is provided on the thermostatic rack (3-3), and the thermostatic sleeve (6) is fixedly fitted on the tapered tube (3-1).

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