A multi-parameter steam flexible supply system coupled with a power plant and solar energy

Abstract

This utility model discloses a multi-parameter flexible steam supply system coupled with solar energy in a power plant, belonging to the field of heating technology. It includes a medium-pressure steam supply system, a high-pressure steam supply system, and a low-pressure steam supply system. This system utilizes solar thermal heating of the heating network feedwater as the working fluid source for generating low-pressure steam, reducing the consumption of high-grade drive steam by the steam pressure matching device and achieving efficient energy utilization. Furthermore, it uses solar photovoltaic power generation to directly drive the key actuators of the steam compressor and steam pressure matching device, ensuring the continuous stability of system operation. This coupling mechanism significantly reduces dependence on traditional fossil fuel electricity, directly lowering fuel consumption and steam supply costs during system operation. Simultaneously, it reduces greenhouse gas emissions such as carbon dioxide at the source, demonstrating significant environmental and economic benefits. It provides an effective technical path for achieving green, low-carbon, and efficient energy supply in the thermal power industry.

Description

Technical Field

[0001] This utility model belongs to the field of heating technology, specifically relating to a multi-parameter flexible steam supply system coupled with power plant and solar energy. Background Technology

[0002] In industrial production, steam, as an important energy medium, is widely used in numerous production lines. With the rapid pace of urban development, the coverage of centralized heating systems continues to expand, and the scale of industrial users is constantly increasing. Consequently, the demands on steam parameters in production processes are becoming increasingly refined and diversified. Different industries and different processes are placing more varied and stringent requirements on parameters such as steam pressure, temperature, and saturation.

[0003] However, traditional power plants and heating networks have relatively simple parameters and limited regulation capabilities, making it difficult to adapt to the diverse steam quality requirements of different users. This mismatch between the heating network's supply capacity and users' actual needs has become a significant bottleneck restricting the expansion of the market and the improvement of service capabilities of thermal power companies. It fails to meet the steam expectations of emerging industries and companies with special requirements for steam quality, thus limiting the expansion of power plant business and the improvement of market competitiveness.

[0004] Therefore, how to build a supply system that can flexibly and efficiently provide steam with multiple parameters to meet the differentiated needs of users and help power plants overcome the technical limitations in their current business expansion has become a key technical problem that urgently needs to be solved in the industry. Summary of the Invention

[0005] The purpose of this invention is to overcome the contradiction between the single steam parameter in traditional thermal systems and the diversified user needs, and to provide a flexible multi-parameter steam supply system coupled with power plants and solar energy, which can simultaneously meet the needs of steam at different pressures and temperatures, and achieve efficient energy utilization.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a multi-parameter flexible steam supply system coupled with power plant and solar energy, including a medium-pressure steam supply system, a high-pressure steam supply system and a low-pressure steam supply system; The medium-pressure steam supply system includes a buffer tank, the inlet of which is connected to the power plant's steam source, and the first outlet of which is connected to a medium-pressure steam user via a medium-pressure steam pipeline. The high-pressure steam supply system includes a steam desuperheater and a steam compressor connected in sequence. The inlet of the steam desuperheater is connected to the second outlet of the buffer tank, and the outlet of the steam compressor is connected to the high-pressure steam user through a high-pressure steam pipeline. The low-pressure steam supply system includes a steam pressure matching device. The high-pressure inlet of the steam pressure matching device is connected to the third outlet of the buffer tank, the low-pressure inlet of the steam pressure matching device is connected to the heating network feed water heating pipeline, and the outlet of the steam pressure matching device is connected to the low-pressure steam user through a low-pressure steam pipeline. The system also includes a solar power supply system, the power output of which is connected to the drive motor of the steam compressor and the regulating actuator of the steam pressure matcher.

[0007] A further improvement of this invention is that the buffer tank is a pressure vessel with at least three steam outlets.

[0008] A further improvement of this utility model is that the drive motor is an electric motor; and the regulating actuator is an actuator.

[0009] A further improvement of this invention is that the electric motor is coaxially connected to the steam compressor; and the actuator is an electric regulating valve, which is installed on the steam pressure matching device.

[0010] A further improvement of this invention is that the solar power supply system includes a photovoltaic power generation unit and an energy storage unit.

[0011] A further improvement of this invention is that the photovoltaic power generation unit includes a photovoltaic panel, and the energy storage unit includes an energy storage battery.

[0012] A further improvement of this invention is that the photovoltaic panel is connected to the energy storage battery.

[0013] A further improvement of this invention is that the steam compressor is a centrifugal steam compressor.

[0014] A further improvement of this utility model is that the heating pipeline for the heating network includes a solar thermal heater, which is connected to a solar concentrator.

[0015] A further improvement of this invention is that the solar concentrator is a trough-type concentrator.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a multi-parameter flexible steam supply system coupled with solar energy in a power plant. This system utilizes a single power plant steam source combined with a buffer tank for rational flow distribution, simultaneously producing medium-pressure, high-pressure, and low-pressure steam. This effectively meets the diverse needs of different users for steam pressure, temperature, and other parameters, significantly improving the flexibility and applicability of power plant steam supply. On one hand, by utilizing solar thermal resources to preheat the feedwater of the heating network as the working fluid for generating low-pressure steam, the consumption of high-grade driving steam by the steam pressure matcher is reduced, achieving cascaded and efficient energy utilization. On the other hand, solar photovoltaic power generation directly drives the key actuators of the steam compressor and steam pressure matcher, ensuring the continuous stability of system operation. This coupling mechanism significantly reduces dependence on traditional fossil fuel electricity, directly reducing fuel consumption and steam supply costs during system operation. Simultaneously, it reduces emissions of greenhouse gases such as carbon dioxide at the source, resulting in significant environmental and economic benefits. This provides an effective technical path for achieving green, low-carbon, and efficient energy supply in the thermal power industry. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components of the present invention.

[0018] Figure 1 This is a schematic diagram of the multi-parameter flexible steam supply system that couples power plants and solar energy according to this utility model.

[0019] The components include: 1. Buffer tank; 2. Evaporative desuperheater; 3. Steam compressor; 4. Steam pressure matching device; 5. Electric motor; 6. Photothermal heater; 7. Parabolic trough concentrator; 8. Photovoltaic panel; 9. Energy storage battery; 10. Actuator. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. 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.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings: like Figure 1As shown, this utility model provides a multi-parameter flexible steam supply system coupled with solar energy in a power plant, including a medium-pressure steam supply system, a high-pressure steam supply system, and a low-pressure steam supply system. The medium-pressure steam supply system includes a buffer tank 1, the inlet of which is connected to the power plant's steam source, and the first outlet of which is connected to a medium-pressure steam user via a medium-pressure steam pipeline. The high-pressure steam supply system includes a steam desuperheater 2 and a steam compressor 3 connected in sequence, the inlet of which is connected to the second outlet of the buffer tank 1, and the outlet of which is connected to a high-pressure steam user via a high-pressure steam pipeline. The low-pressure steam supply system includes a steam pressure matching device 4, the high-pressure inlet of which is connected to the third outlet of the buffer tank 1, the low-pressure inlet of which is connected to the heating network feedwater heating pipeline, and the outlet of which is connected to a low-pressure steam user via a low-pressure steam pipeline. The system also includes a solar power supply system, the power output of which is connected to the motor 5 of the steam compressor 3 and the actuator 10 of the steam pressure matching device 4.

[0027] Furthermore, the buffer tank 1 is a pressure vessel with at least three steam outlets. It can efficiently and stably distribute power plant steam from a single source to medium-pressure, high-pressure, and low-pressure steam users. While ensuring that the steam parameters of each branch are independently controllable, it simplifies the system structure, reduces the number of equipment and potential leakage points, and improves the reliability and integration of the entire steam supply system.

[0028] Furthermore, the electric motor 5 is coaxially connected to the steam compressor 3, achieving zero power transmission loss and ensuring the high efficiency and reliability of the steam compressor 3. The actuator 10 is an electric regulating valve installed on the steam pressure matching device 4, which can achieve rapid and precise regulation of steam flow and pressure. It has a fast response speed and high control accuracy, effectively ensuring the stability of low-pressure steam output parameters, while simplifying the pipeline structure and reducing the risk of leakage.

[0029] The solar power system includes a photovoltaic power generation unit and an energy storage unit. The photovoltaic power generation unit includes photovoltaic panels 8, and the energy storage unit includes an energy storage battery 9. The photovoltaic panels 8 and the energy storage battery 9 are connected. The photovoltaic panels 8 provide power to the motor 5 of the steam compressor 3 and the actuator 10 of the steam pressure matching device 4. Excess power is stored in the energy storage battery 9. When the photovoltaic power is insufficient, the energy storage battery 9 releases power to provide power to the motor 5 of the steam compressor 3 and the actuator 10 of the steam pressure matching device 4.

[0030] As a preferred option, steam compressor 3 is a centrifugal steam compressor, which operates smoothly and reliably, requires low maintenance, and can efficiently and continuously provide stable high-pressure steam, making it suitable for the high-pressure steam supply requirements of this system.

[0031] The heating pipeline of the heating network includes a solar thermal heater 6, which is connected to a solar concentrator 7, which is a trough concentrator 7 that can efficiently convert solar energy into thermal energy and provide a reliable heat source for the system.

[0032] Working principle In the multi-parameter flexible steam supply system coupled with solar energy of this utility model, the steam from the power plant first enters the buffer tank 1 for pressure stabilization and distribution. The steam coming out of the buffer tank 1 is divided into three flows: one part of the steam is directly supplied to medium-pressure steam users; another part is first cooled by the steam desuperheater 2, and the cooled steam is compressed by the steam compressor 3 to increase the pressure and temperature, forming high-pressure steam, which is then supplied to high-pressure steam users. The steam compressor 3 is driven by the motor 5 powered by the photovoltaic panel 8; and another part of the steam enters the high-pressure side inlet of the steam pressure matching device 4 as a power source.

[0033] During the steam preparation process, the system simultaneously utilizes solar energy for heating: the trough concentrator 7 collects solar energy to heat the heat transfer oil, and the heat transfer oil preheats the feedwater of the heating network in the solar thermal heater 6. This preheated water exchanges heat with the steam in the steam desuperheater 2, and after being converted into saturated steam, it enters the low-pressure side inlet of the steam pressure matching device 4 as the working medium.

[0034] Within the steam pressure matcher 4, the driving steam from the buffer tank 1 is mixed and regulated with solar-preheated steam to generate low-pressure steam that meets the requirements and is supplied to the user. Throughout the system, the motor 5 of the steam compressor 3 and the actuator 10 of the pressure matcher 4 are both powered by a solar power system. Excess electricity generated by photovoltaics is stored in the energy storage battery 9, providing backup power when sunlight is insufficient, thus ensuring a continuous and stable supply of steam with different parameters.

[0035] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.

[0036] The above content provides a further detailed description of this utility model. It should not be considered that the specific embodiments of this utility model are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the scope of protection of this utility model as defined by the submitted claims.

Claims

1. A multi-parameter flexible steam supply system coupled with solar energy in a power plant, characterized in that, This includes medium-pressure steam supply systems, high-pressure steam supply systems, and low-pressure steam supply systems; The medium-pressure steam supply system includes a buffer tank (1), the inlet of which is connected to the power plant steam source, and the first outlet of the buffer tank (1) is connected to the medium-pressure steam user through a medium-pressure steam pipeline; The high-pressure steam supply system includes a steam desuperheater (2) and a steam compressor (3) connected in sequence. The inlet of the steam desuperheater (2) is connected to the second outlet of the buffer tank (1), and the outlet of the steam compressor (3) is connected to the high-pressure steam user through a high-pressure steam pipeline. The low-pressure steam supply system includes a steam pressure matching device (4), the high-pressure inlet of the steam pressure matching device (4) is connected to the third outlet of the buffer tank (1), the low-pressure inlet of the steam pressure matching device (4) is connected to the heating network water supply heating pipeline, and the outlet of the steam pressure matching device (4) is connected to the low-pressure steam user through the low-pressure steam pipeline. The system also includes a solar power supply system, the power output of which is connected to the drive motor of the steam compressor (3) and the regulating actuator of the steam pressure matcher (4).

2. The multi-parameter flexible steam supply system coupled with solar energy as described in claim 1, characterized in that, The buffer tank (1) is a pressure vessel with at least three steam outlets.

3. The multi-parameter flexible steam supply system coupled with solar energy as described in claim 1, characterized in that, The drive motor is an electric motor (5); the regulating actuator is an actuator (10).

4. A multi-parameter flexible steam supply system coupled with solar energy as described in claim 3, characterized in that, The electric motor (5) is coaxially connected to the steam compressor (3); the actuator (10) is an electric regulating valve, which is installed on the steam pressure matching device (4).

5. A multi-parameter flexible steam supply system coupled with solar energy as described in claim 1, characterized in that, The solar power supply system includes a photovoltaic power generation unit and an energy storage unit.

6. A multi-parameter flexible steam supply system coupled with solar energy as described in claim 5, characterized in that, The photovoltaic power generation unit includes a photovoltaic panel (8), and the energy storage unit includes an energy storage battery (9).

7. A multi-parameter flexible steam supply system coupled with solar energy as described in claim 6, characterized in that, The photovoltaic panel (8) is connected to the energy storage battery (9).

8. A multi-parameter flexible steam supply system coupled with solar energy as described in claim 1, characterized in that, The steam compressor (3) is a centrifugal steam compressor.

9. A multi-parameter flexible steam supply system coupled with solar energy as described in claim 1, characterized in that, The heating pipeline for the heating network includes a solar thermal heater (6), which is connected to a solar concentrator.

10. A multi-parameter flexible steam supply system coupled with solar energy as described in claim 9, characterized in that, The solar concentrator is a trough concentrator (7).

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