Cold and heat supply system

Abstract

The invention discloses a cold and heat supply system which comprises a steam extraction injection device used for extracting steam from the outside and spraying out the steam after the pressure of the steam is adjusted. The heat storage heat exchanger communicates with the steam extraction injection device and is used for dividing the steam into hot steam and cold steam; the heat storage water tank is communicated with the heat storage heat exchanger and is used for receiving hot steam; the first end of the throttling valve communicates with the heat storage heat exchanger, the second end of the throttling valve communicates with the supply device, and the throttling valve is used for receiving the cold steam and transmitting the cold steam to the supply device after the pressure of the cold steam is reduced so as to supply heat energy to the outside. Hot steam or cold steam can be provided through the heat storage heat exchanger according to requirements, first-time steam temperature adjustment, namely cold and hot separation, is achieved, secondary temperature adjustment can be conducted by adjusting the opening degree of the throttling valve, and therefore the flexibility and the energy efficiency of the system are improved.

Description

Technical Field

[0001] The present application relates to the field of heating, and in particular to a cold and hot supply system. Background Art

[0002] With the requirements of carbon peak and carbon neutrality, the intensification of energy crisis, global warming and other issues, how to achieve clean and efficient energy development and utilization has received more and more attention. In order to achieve the above goals, the combined heat and power system using steam cycle has been widely used in industrial production. The steam cycle device uses high-pressure steam to generate kinetic energy to drive the compressor to rotate, drive the compressor to compress the sucked low-pressure steam, increase the pressure and send it into the steam cycle device, and continuously circulate the thermal energy of the steam to achieve efficient use of steam. In actual applications, the steam cycle device also needs to recover the heat generated by the compressor, and then use the heat generated by the compressor to heat the condensed water in the production process to reduce heat waste. Therefore, improving the utilization rate of the heat energy generated by the steam cycle loop has become the key to achieving efficient operation of the steam cycle system.

[0003] In traditional cogeneration systems, steam is usually preliminarily treated through a steam recovery device to separate the condensed water in the steam. By recovering the condensed water in the steam, part of the heat energy is recovered. However, the recovered condensed water is usually discharged directly, and the energy in the recovered condensed water is not fully utilized, resulting in a waste of heat energy. In addition, the existing steam recovery technology usually cools the recovered steam through a heat exchange device to obtain steam at a certain pressure for refrigeration.

[0004] However, the refrigeration effect of traditional technology is not good. Summary of the invention

[0005] An embodiment of the present application provides a cold and hot supply system.

[0006] According to one aspect of an embodiment of the present application, a cold and hot supply system is provided, including a steam extraction and injection device, for extracting steam from the outside and ejecting the steam after adjusting the pressure of the steam; a heat storage heat exchanger, connected to the steam extraction and injection device, for dividing the steam into hot steam and cold steam; a heat storage tank, connected to the heat storage heat exchanger, for receiving hot steam; a throttle valve and a supply device, a first end of the throttle valve is connected to the heat storage heat exchanger, and a second end of the throttle valve is connected to the supply device, for receiving cold steam, and after reducing the pressure of the cold steam, transmitting the cold steam to the supply device to supply heat energy to the outside.

[0007] In one embodiment of the present application, the system further includes a first regulating valve, a second regulating valve, and a controller; the first end of the first regulating valve is connected to the heat storage tank, and the second end of the first regulating valve is connected to the first end of the second regulating valve; the second end of the second regulating valve is connected to the supply device; the heat storage heat exchanger includes a first interface, a second interface, a third interface, and a fourth interface, the first interface is connected to the steam extraction and injection device, the second interface is connected to the heat storage tank, the third interface is connected to the first end of the throttle valve, and the fourth interface is connected to the second end of the first regulating valve; the controller is electrically connected to the first regulating valve and the second regulating valve, respectively, and is used to control the first regulating valve to open and the second regulating valve to close to establish a first steam cycle, or to control the first regulating valve to close and the second regulating valve to open to establish a second steam cycle, wherein the first steam cycle is that hot steam circulates between the heat storage heat exchanger and the heat storage tank, and the second steam cycle is that hot steam circulates between the heat storage tank, the heat storage heat exchanger and the supply device.

[0008] In one embodiment of the present application, the system also includes a third regulating valve, a first end of the third regulating valve is connected to the first end of the first regulating valve, and a second end of the third regulating valve is connected to the supply device; the controller is electrically connected to the third regulating valve, and is used to control the third regulating valve to open when the second regulating valve is controlled to open, so as to establish a second steam cycle.

[0009] In one embodiment of the present application, the controller is connected to the throttle valve and is also used to obtain the working mode of the cold and hot supply system, and adjust the opening of the throttle valve according to the working mode of the cold and hot supply system, wherein the working mode includes one of a heating mode and a cooling mode. When the cold and hot supply system is in the cooling mode, the opening of the throttle valve is greater than the opening of the throttle valve when the cold and hot supply system is in the heating mode.

[0010] In one embodiment of the present application, the supply device includes a cooling heat exchanger, the cooling heat exchanger includes a first circulation pipeline and a first heat exchange pipeline, the first end of the first circulation pipeline is connected to the second end of the throttle valve, the second end of the first circulation pipeline is connected to the steam extraction and injection device, and the first heat exchange pipeline is used to exchange temperature with the first circulation pipeline; an output heat exchanger, the output heat exchanger is connected to the first heat exchange pipeline, and is used to supply the heat energy transferred by the first heat exchange pipeline to the outside.

[0011] In one embodiment of the present application, the supply device also includes a fourth regulating valve, a first end of the fourth regulating valve is connected to the first end of the first circulation pipeline of the cooling heat exchanger, and a second end of the fourth regulating valve is connected to the second end of the first circulation pipeline of the cooling heat exchanger; the controller is electrically connected to the fourth regulating valve, and is used to control the opening of the fourth regulating valve to bypass the first circulation pipeline of the cooling heat exchanger.

[0012] In one embodiment of the present application, the system also includes a waste steam heat recovery heat exchanger, which includes a second circulation pipeline, a first end of the second circulation pipeline is connected to the first end of the first circulation pipeline of the cooling heat exchanger, and a second end of the second circulation pipeline is connected to the steam extraction and injection device.

[0013] In one embodiment of the present application, the system also includes a condenser; the exhaust steam heat recovery heat exchanger also includes a second heat exchange pipeline, the first end of the second heat exchange pipeline is connected to the steam extraction and injection device, the second end of the second heat exchange pipeline is connected to the condenser, and the second heat exchange pipeline is used for temperature exchange with the second circulation pipeline.

[0014] In one embodiment of the present application, the steam extraction and injection device includes a pressure cylinder, and the pressure cylinder is used to adjust the pressure of the steam.

[0015] In one embodiment of the present application, the steam extraction and ejection device further includes an ejector, which is connected to the pressure cylinder and is used to eject the steam after the pressure is adjusted.

[0016] The above-mentioned hot and cold supply system realizes efficient use of steam through the coordinated work of the steam extraction and ejection device, the heat storage heat exchanger, the heat storage tank, the throttle valve and the supply device. The setting of the heat storage heat exchanger improves the management ability of the entire system for thermal energy. It can use waste heat for heat storage in the non-heating season and release the stored heat energy in the heating season, realizing the cross-seasonal allocation of heat energy, improving the comprehensive utilization efficiency of energy, and realizing the first temperature adjustment of steam, while reducing peak power demand and carbon emissions. The throttle valve is located on the pipeline between the heat storage heat exchanger and the supply device. Its function is to reduce the pressure of steam and reduce the pressure of cold steam to the pressure level required by the supply device, thereby ensuring the safety and effective use of steam in the supply device. Not only can hot steam or cold steam be provided according to demand, but also secondary temperature adjustment can be performed by adjusting the opening of the throttle valve, thereby improving the flexibility and energy efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 is a structural block diagram of a cold and hot supply system according to an embodiment of the present application;

[0020] Figure 2 is a structural schematic diagram of a cold and hot supply system according to an embodiment of the present application;

[0021] Figure 3 This is the second structural schematic diagram of a cold and hot supply system according to an embodiment of the present application.

[0022] Description of reference numerals:

[0023] 10-extraction and ejection device, 20-heat storage heat exchanger, 30-heat storage tank, 40-throttle valve, 50-supply device, 60-first regulating valve, 61-second regulating valve, 62-third regulating valve, 63-fourth regulating valve, 70-cooling heat exchanger, 71-output heat exchanger, 72-exhaust steam heat recovery heat exchanger, 80-condenser. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0029] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element, or connected to the other element through an intermediate element. In addition, the "connection" in the following embodiments should be understood as "electrical connection", "communication connection", etc. if there is transmission of electrical signals or data between the connected objects.

[0030] In this embodiment, a cold and hot supply system is provided. Figure 1 It is a structural diagram of an optional cold and hot supply system according to an embodiment of the present application, comprising: a steam extraction and injection device 10, a heat storage heat exchanger 20, a hot water storage tank 30, a throttle valve 40 and a supply device 50, wherein:

[0031] The steam extraction and ejection device 10 is used to extract steam from the outside and eject the steam after adjusting the pressure of the steam.

[0032] Specifically, the steam extraction and ejection device is a key component in the cold and hot supply system. It uses the high pressure and kinetic energy of steam to extract steam from the outside through the Venturi effect, then adjusts the steam pressure to an appropriate level and then ejects the steam. The design of this device cleverly utilizes the natural properties of steam and does not require additional rotating machinery such as pumps or compressors, thereby reducing the complexity and operating costs of the system.

[0033] The heat storage heat exchanger 20 is in communication with the steam extraction and ejection device 10 and is used for dividing the steam into hot steam and cold steam.

[0034] Specifically, the thermal storage heat exchanger divides the conditioned steam into hot steam and cold steam. The hot steam is directed to the hot water storage tank to store heat, while the cold steam is reduced in pressure through the throttle valve for subsequent transmission to the supply device. The thermal storage heat exchanger achieves efficient use of steam energy through precise heat distribution.

[0035] Among them, the heat storage heat exchanger can transfer the heat of the hot working medium (high-pressure and high-temperature water or water vapor) after being lifted in the equivalent heat pump cycle to the water in the hot water storage tank. In the non-heating season, through this process, the hot water storage tank can be preheated or the water can be heated to a higher temperature to store the heat energy. Through the heat storage heat exchanger, heat is effectively extracted from the equivalent heat pump cycle and stored in the hot water storage tank, realizing cross-seasonal energy transfer. For example, in summer or seasons with higher temperatures, the hot water storage tank can collect and store the heat obtained by exhaust steam recovery so that it can be released and used in winter or seasons where heating is needed. In the heating season, the heat storage heat exchanger transfers the heat energy in the hot water storage tank to the primary heat network heat exchanger again, thereby providing stable heating for the users of the heat network. It can smooth the heating demand, especially during the peak period of heating load, by supplementing the situation where the immediate heat source may be insufficient through the heat stored in advance.

[0036] The hot water storage tank 30 is in communication with the heat storage heat exchanger 20 for receiving hot steam.

[0037] The hot water storage tank is used to store the heat carried by the hot steam separated by the heat storage heat exchanger, and is usually filled with water or other heat storage media. The design of the hot water storage tank takes into account the thermal insulation performance and capacity, which can ensure the minimum loss of heat during storage, while being able to store a large amount of heat as needed.

[0038] The throttle valve 40 and the supply device 50, the first end of the throttle valve 40 is connected to the heat storage heat exchanger 20, and the second end of the throttle valve 40 is connected to the supply device 50, for receiving cold steam and transmitting the cold steam to the supply device 50 after reducing the pressure of the cold steam to supply heat energy to the outside.

[0039] Among them, the main function of the throttle valve is to establish a pressure drop between the high-pressure side and the low-pressure side. In the equivalent heat pump cycle, when the high-pressure working fluid flows through the throttle valve, its pressure will drop rapidly. This process is usually accompanied by a decrease in temperature, achieving secondary cooling and creating conditions for the subsequent condensation or evaporation process. The throttle valve is also responsible for regulating the flow of the working fluid flowing through to ensure that the circulation amount of the working fluid in the system matches the needs of the heat pump. By adjusting the opening of the throttle valve, the flow of the working fluid from the high-pressure area to the low-pressure area can be controlled, thereby affecting the cooling or heating capacity of the system. When the high-pressure working fluid passes through the throttle valve, its energy state changes from a high-pressure and high-temperature state to a low-pressure and low-temperature state. This change in state is the basis for the heat pump system to achieve energy transfer from a low-temperature heat source to a high-temperature heat source, that is, in the cooling mode, the temperature reduced after the throttle valve can be used to cool the environment or generate cold energy; in the heating mode, it can absorb the heat of the environment.

[0040] In this embodiment, the efficient use of steam is achieved through the coordinated work of the steam extraction and ejection device 10, the heat storage heat exchanger 20, the heat storage tank 30, the throttle valve 40 and the supply device 50. The setting of the heat storage heat exchanger 20 improves the management ability of the entire system for thermal energy. It can use waste heat for heat storage in the non-heating season and release the stored heat energy in the heating season, thereby realizing the cross-seasonal allocation of heat energy, improving the comprehensive utilization efficiency of energy, and realizing the first temperature adjustment of steam, while reducing peak power demand and carbon emissions. The throttle valve 40 is located on the pipeline between the heat storage heat exchanger 20 and the supply device 50. Its function is to reduce the pressure of steam and reduce the pressure of cold steam to the pressure level required by the supply device 50, thereby ensuring the safety and effective use of steam in the supply device 50. Not only can hot steam or cold steam be provided according to demand, but also the secondary temperature adjustment can be performed by adjusting the opening of the throttle valve 40, thereby improving the flexibility and energy efficiency of the system.

[0041] In one embodiment, please continue to see Figure 1 The cold and hot supply system also includes: a first regulating valve 60, a second regulating valve 61, and a controller (not shown in the figure), wherein:

[0042] A first end of the first regulating valve 60 is communicated with the hot water storage tank 30 , and a second end of the first regulating valve 60 is communicated with a first end of the second regulating valve 61 .

[0043] The second end of the second regulating valve 61 is in communication with the supply device 50 .

[0044] Specifically, the first regulating valve and the second regulating valve are key valves used to control the steam circulation path in the system. The first regulating valve is connected to the heat storage tank and the first end of the second regulating valve, and the second end of the second regulating valve is directly connected to the supply device. By controlling the opening and closing states of the two regulating valves through the controller, it is possible to flexibly switch between the first steam cycle and the second steam cycle, and reasonably distribute the heat energy and cold energy in the system.

[0045] The heat storage heat exchanger 20 includes a first interface, a second interface, a third interface, and a fourth interface. The first interface is connected to the steam extraction and injection device 10, the second interface is connected to the hot water storage tank 30, the third interface is connected to the first end of the throttle valve 40, and the fourth interface is connected to the second end of the first regulating valve 60.

[0046] Specifically, the first interface is connected to the steam extraction and injection device for receiving hot steam; the second interface is connected to the heat storage tank for transporting hot steam into the tank for heat storage; the third interface is connected to the first end of the throttle valve for receiving steam to be throttled; and the fourth interface is connected to the second end of the first regulating valve for delivering steam to the supply device in the second steam cycle.

[0047] The controller is electrically connected to the first regulating valve 60 and the second regulating valve 61, respectively, and is used to control the first regulating valve 60 to open and the second regulating valve 61 to close, so as to establish a first steam cycle, or to control the first regulating valve 60 to close and the second regulating valve 61 to open, so as to establish a second steam cycle, wherein the first steam cycle is that hot steam circulates between the heat storage heat exchanger 20 and the hot water storage tank 30, and the second steam cycle is that hot steam circulates between the hot water storage tank 30, the heat storage heat exchanger 20 and the supply device 50.

[0048] In this embodiment, by setting the first regulating valve and the second regulating valve, the flexibility of the operation of the entire system is improved. By controlling the path of the steam circulation, the heat storage tank can be charged preferentially in the non-heating season, and the stored heat energy can be delivered to the supply device in the heating season to meet user needs. At the same time, unnecessary energy waste is avoided, and the energy management level and economic benefits of the system are improved.

[0049] In one embodiment, please continue to see Figure 1 The cold and hot supply system further includes: a third regulating valve 62 , a first end of the third regulating valve 62 is connected to a first end of the first regulating valve 60 , and a second end of the third regulating valve 62 is connected to the supply device 50 .

[0050] Specifically, the first end of the third regulating valve is connected to the first end of the first regulating valve, and the second end is directly connected to the supply device. When the system is in the second steam circulation mode, that is, when the system needs to extract heat from the hot water storage tank and supply it to the outside, the third regulating valve will be opened by the controller to ensure that steam can flow smoothly from the heat storage heat exchanger to the supply device.

[0051] The controller is electrically connected to the third regulating valve 62 and is used to control the third regulating valve 62 to open when the second regulating valve 61 is controlled to open, so as to establish a second steam cycle.

[0052] Specifically, the controller can directly control the on / off state of the third regulating valve intelligently. When the system needs to switch to the second steam circulation mode, that is, to extract heat from the hot water storage tank, the controller will open the second regulating valve and the third regulating valve at the same time to ensure that the hot steam can flow from the heat storage heat exchanger through the throttle valve and the third regulating valve to the supply device, and finally supply heat energy to the user.

[0053] In this embodiment, the presence of the third regulating valve enhances the adaptability and control accuracy of the system. It ensures that the system can respond quickly when it is necessary to supply heat energy to the user, avoiding insufficient or excessive heat energy supply due to valve response delay. In addition, by accurately controlling the flow of steam from the heat storage heat exchanger to the supply device, the efficiency of heat energy transmission is improved, and the energy loss during the transmission process is reduced, thereby improving the energy utilization efficiency and economic benefits of the overall system. The linkage control of the controller and the third regulating valve realizes seamless switching and optimized operation of the system operation mode. In the second steam cycle mode, the controller can quickly adjust the opening of the third regulating valve according to the real-time heat load demand and system status to ensure the timely supply of heat energy while maintaining the overall stability and efficiency of the system.

[0054] In one embodiment, the controller is connected to the throttle valve 40, and is also used to obtain the working mode of the cold and hot supply system, and adjust the opening of the throttle valve 40 according to the working mode of the cold and hot supply system, wherein the working mode includes one of a heating mode and a cooling mode. When the cold and hot supply system is in the cooling mode, the opening of the throttle valve 40 is greater than the opening of the throttle valve 40 when the cold and hot supply system is in the heating mode.

[0055] Specifically, the system's operating modes are divided into heating mode and cooling mode. The controller can intelligently identify the current mode of the system and dynamically adjust the opening of the throttle valve according to this mode. Specifically, when the system is in cooling mode, the controller will adjust the opening of the throttle valve to a larger degree to force more steam (as cold steam) to pass through the throttle valve at a lower pressure, thereby generating more cold energy in the cooling heat exchanger. On the contrary, in heating mode, the controller will adjust the opening of the throttle valve to a smaller degree to reduce the generation of cold energy, and use more heat energy to heat the hot water storage tank through the heat storage heat exchanger, and finally supply heat energy to users.

[0056] In this embodiment, the mechanism of intelligently adjusting the throttle valve opening according to the working mode greatly improves the energy efficiency and operational flexibility of the system. In the cooling mode, a larger throttle valve opening can ensure that the system generates enough cooling to meet user needs, and at the same time, by reducing the steam pressure, the efficiency of cold energy generation is improved. In the heating mode, the controller effectively controls the generation of cold energy by reducing the throttle valve opening, avoiding unnecessary energy waste, and ensuring that more heat energy is effectively used for heating, thereby improving the utilization efficiency of heat energy and the heating effect. This dynamic adjustment mechanism can also help the system better adapt to changes in the external environment and load demand, ensuring that the system can operate stably and efficiently in different seasons and working conditions, and providing users with a continuous, high-quality supply of hot and cold energy.

[0057] In one embodiment, Figure 2 As shown, the supply device 50 includes: a cooling heat exchanger 70 and an output heat exchanger 71, wherein:

[0058] The cooling heat exchanger 70 includes a first circulation pipeline and a first heat exchange pipeline. The first end of the first circulation pipeline is connected to the second end of the throttle valve 40, and the second end of the first circulation pipeline is connected to the steam extraction and injection device 10. The first heat exchange pipeline is used for temperature exchange with the first circulation pipeline.

[0059] Specifically, the cooling heat exchanger is a key component in the system for generating cold energy in the non-heating season. It consists of a first circulation pipeline and a first heat exchange pipeline. The first end of the first circulation pipeline is connected to the second end of the throttle valve to receive steam that has been throttled and has reduced pressure and temperature. The steam flows in the first circulation pipeline and transfers the cold energy it carries to the medium in the first heat exchange pipeline, usually water or refrigerant, by exchanging heat with the first heat exchange pipeline. The first heat exchange pipeline is used to exchange heat with the external cold demand environment to release cold energy to users to meet the cooling demand.

[0060] The output heat exchanger 71 is in communication with the first heat exchange pipeline, and is used to supply the heat energy transferred by the first heat exchange pipeline to the outside.

[0061] Specifically, the output heat exchanger is located after the cooling heat exchanger and is directly connected to the first heat exchange pipeline. Its function is to further transfer the medium carrying cold energy after heat exchange in the cooling heat exchanger to external users, so as to achieve the final distribution and utilization of cold energy. The design of the output heat exchanger takes into account the compatibility and efficiency with the user side, ensuring that the cold energy can be smoothly and efficiently transmitted to the final cold energy use point.

[0062] In this embodiment, the design of the cooling heat exchanger makes full use of the cold energy generated by the heat pump system. Especially in the non-heating season, when the system needs to extract cold energy from steam, the cooling heat exchanger can efficiently capture these low-grade cold energy and convert them into cold energy that can be used by users, thereby realizing the diversified utilization of energy. This design not only reduces the dependence on the traditional refrigeration system and reduces the refrigeration energy consumption, but also improves the energy utilization efficiency and economic benefits of the entire system. Especially when the cold and hot demand seasons alternate, the energy supply can be adjusted more flexibly to meet the needs of users in different seasons. The setting of the output heat exchanger ensures that the cold energy generated by the system can be effectively utilized and meets the needs of external users for cold energy. It not only improves the flexibility and efficiency of the system in supplying cold energy to users, but also reduces the energy loss in the process of cold energy transmission, and improves the energy utilization level of the entire system. Especially in summer or non-heating seasons, when the cold demand on the user side increases, the output heat exchanger can respond quickly and deliver the required cold energy to the user in a timely and accurate manner, thereby improving the response speed and service quality of the system, providing users with a stable and efficient cold energy supply, and at the same time contributing to the overall energy conservation and emission reduction and economic benefits of the system.

[0063] In one embodiment, please continue to see Figure 2 The supply device 50 also includes: a fourth regulating valve 63.

[0064] A first end of the fourth regulating valve 63 is communicated with a first end of the first circulation pipeline of the cooling heat exchanger 70 , and a second end of the fourth regulating valve 63 is communicated with a second end of the first circulation pipeline of the cooling heat exchanger 70 .

[0065] Specifically, the fourth regulating valve is a key valve in the system for controlling the bypass operation of the first circulation pipeline of the cooling heat exchanger. Its first end is connected to the first end of the first circulation pipeline of the cooling heat exchanger, and its second end is connected to the second end of the first circulation pipeline. This means that when the fourth regulating valve is opened, steam or water can directly bypass the cooling heat exchanger to form an internal circulation bypass without having to pass through the first heat exchange pipeline for heat exchange.

[0066] The controller is electrically connected to the fourth regulating valve 63 and is used to control the fourth regulating valve 63 to open so as to bypass the first circulation pipeline of the cooling heat exchanger 70 .

[0067] Specifically, the electrical connection between the controller and the fourth regulating valve means that the controller can remotely control the opening and closing state of the fourth regulating valve through an electrical control signal according to the real-time changes in the system operating mode and external demand. This intelligent control method enables the system to quickly respond to different operating requirements. For example, when the cooling demand is low or the system needs to switch to the heating mode, the controller can immediately control the fourth regulating valve to open and realize the bypass operation of the first circulation pipeline.

[0068] In this embodiment, the setting of the fourth regulating valve provides flexibility and stability of system operation. When cooling is not required or the system is maintained, the fourth regulating valve is opened by the controller, and the circulation pipeline of the cooling heat exchanger can be bypassed to avoid the load and wear of the heat exchanger under non-essential conditions, while ensuring the normal operation of other parts of the system. This not only contributes to the long-term maintenance and stable operation of the system, but also saves energy and operating costs under specific conditions, and improves the overall economy and energy efficiency of the system. The electrical connection between the controller and the fourth regulating valve greatly enhances the automation level and operating efficiency of the system. Through intelligent control strategies, the system can seamlessly switch between different operating modes to meet the user's heating and cooling needs in different seasons and times. This high-precision control method not only reduces the errors and response delays of manual operations, but also ensures the stability and safety of the system under various conditions, while optimizing energy utilization, reducing unnecessary energy waste, and improving the overall performance and economic benefits of the system.

[0069] In one embodiment, Figure 3 As shown, the cold and hot supply system also includes: a waste steam heat recovery heat exchanger 72, the waste steam heat recovery heat exchanger 72 includes a second circulation pipeline, the first end of the second circulation pipeline is connected to the first end of the first circulation pipeline of the cold supply heat exchanger 70, and the second end of the second circulation pipeline is connected to the steam extraction and injection device 10.

[0070] Specifically, the exhaust steam heat recovery heat exchanger is designed to recover the exhaust steam heat energy discharged from the low-pressure cylinder of the steam turbine and improve energy utilization. In the system, it is connected to the first circulation pipeline of the cooling heat exchanger through the second circulation pipeline, forming a closed loop for heat energy recovery and utilization. The first end of the second circulation pipeline is connected to the cooling heat exchanger to receive the working fluid after pressure regulation by the throttle valve; the second end is connected to the steam extraction and injection device to return the working fluid to the equivalent heat pump cycle, and further pressurize and heat it through the injection effect to prepare for subsequent heat energy supply or storage. The exhaust steam heat recovery heat exchanger uses low-grade heat energy from the low-pressure cylinder and transfers this heat energy to the working fluid through heat exchange, thereby realizing heat energy recovery and reuse.

[0071] Specifically, the second circulation pipeline is the channel for the working medium to flow inside the exhaust steam heat recovery heat exchanger. It connects the first circulation pipeline of the cooling heat exchanger and the steam extraction and ejection device, forming a continuous heat energy recycling loop. The working medium flows in the second circulation pipeline, first receives cold energy or heat energy from the cooling heat exchanger, then passes through the exhaust steam heat recovery heat exchanger, exchanges heat with the exhaust steam discharged from the low-pressure cylinder, absorbs the heat energy therein, and finally is pressurized and heated again by the steam extraction and ejection device, enters the heat storage heat exchanger or the cooling heat exchanger, and completes the storage or supply of heat energy.

[0072] In this embodiment, the setting of the exhaust steam heat recovery heat exchanger significantly improves the energy utilization efficiency of the system, reduces waste heat emissions, and achieves the goal of energy conservation and emission reduction. By recovering the exhaust steam heat energy that was originally discharged directly into the condenser, the system can provide cooling energy in the non-heating season while increasing the supply of heat energy in the heating season, thereby improving the thermal energy utilization efficiency and flexibility of the entire system. In addition, this heat recovery method also reduces the impact on the environment, reduces the dependence on and emissions of cooling water, contributes to the sustainable operation of the system, and at the same time improves economic benefits and reduces operating costs.

[0073] In one embodiment, please continue to see Figure 3 The cold and hot supply system also includes: a condenser 80.

[0074] Specifically, the condenser is a key component in the thermal power generation system. Its main function is to cool and condense the high-temperature and high-pressure steam (exhaust steam) discharged from the low-pressure cylinder of the steam turbine into water to reduce its pressure and temperature so that it can be recycled or discharged into the water treatment system. In the system of the present invention, the condenser, as the end point of the heat energy cycle, receives the steam after heat exchange in the exhaust steam heat recovery heat exchanger, and finally completes the condensation process of the steam, providing a stable heat energy output and condensed water recovery mechanism for the system.

[0075] The exhaust steam heat recovery heat exchanger 72 also includes a second heat exchange pipeline, a first end of the second heat exchange pipeline is connected to the steam extraction and ejection device 10, and a second end of the second heat exchange pipeline is connected to the condenser 80. The second heat exchange pipeline is used for temperature exchange with the second circulation pipeline.

[0076] Specifically, the second heat exchange pipeline is another important component inside the exhaust steam heat recovery heat exchanger, and together with the second circulation pipeline, it forms an efficient heat energy recovery and utilization channel. The first end of the second heat exchange pipeline is connected to the extraction and ejection device to receive the working medium steam after ejection and heating; the second end is connected to the condenser, and the steam is finally introduced into the condenser for cooling and condensation. The second heat exchange pipeline exchanges temperature with the second circulation pipeline, that is, the heat energy of the steam heated by the extraction and ejection device is transferred to the working medium in the second circulation pipeline through heat exchange to achieve the recovery of exhaust steam heat energy.

[0077] In this embodiment, the use of the condenser is indispensable in the traditional thermal power generation system, but in this system, it also bears the important role of working in coordination with the exhaust steam heat recovery heat exchanger to recover and utilize waste heat. By introducing the steam that has passed through the exhaust steam heat recovery heat exchanger into the condenser, the system can further reduce the temperature of the steam, and at the same time recover the cold energy released during the cooling process for the operation of the cooling heat exchanger, thereby realizing a closed loop of energy utilization. This not only improves the overall energy conversion efficiency of the system, but also reduces the dependence on cooling water sources, reduces operating costs, and also reduces the impact of waste heat on the environment. The setting of the second heat exchange pipeline further enhances the function of the exhaust steam heat recovery heat exchanger and realizes the efficient recovery of the exhaust steam heat energy discharged by the turbine. Through heat exchange with the second circulation pipeline, the second heat exchange pipeline can ensure that the heat energy carried by the steam is fully utilized before it is introduced into the condenser, and converted into heat energy that can be stored or supplied by the system, reducing the waste of heat energy. In addition, this design also enables the system to adapt more flexibly to different operating conditions. Whether in cooling or heating mode, it can effectively recover and utilize waste heat, improving the overall operating efficiency of the system and the economy of energy utilization.

[0078] In one embodiment, the steam extraction and injection device 10 includes: a pressure cylinder, and the pressure cylinder is used to adjust the pressure of steam.

[0079] Specifically, the pressure cylinder plays a key role in regulating the steam pressure in the present invention. It is a device that can accurately control the internal gas or steam pressure, and adjusts the steam pressure to the desired level by changing its internal volume or using a mechanism such as a pressure regulator. In the cold and hot supply system, the pressure cylinder receives steam from heat recovery, heat storage or cooling processes, and adjusts the steam pressure according to the system operating status or external demand to meet the specific pressure requirements of subsequent operations or user needs.

[0080] The steam extraction and ejection device 10 further comprises an ejector, which is connected to the pressure cylinder and is used for ejecting the steam after the pressure is adjusted.

[0081] Specifically, the ejector is a device that uses the negative pressure generated by the high-speed working fluid flow to suck in and push the low-speed working fluid flow. In the cold and hot supply system of the present invention, the ejector is connected to the pressure cylinder. When the pressure cylinder completes the steam pressure regulation, the steam is introduced into the ejector. The ejector uses the high-speed flow of steam to generate a negative pressure effect and discharge the steam in the form of a jet. This process not only helps to further utilize the steam energy, but also drives the flow of other fluids in the system to achieve the transmission of energy and media.

[0082] In this embodiment, the steam pressure is regulated by a pressure cylinder, which improves the operating efficiency and flexibility of the system. The precise control of the pressure ensures the stability and availability of the steam in the subsequent process, and avoids the degradation of system performance or unstable operation due to pressure fluctuations. In addition, the use of the pressure cylinder can also reduce the demand for expensive high-pressure pressure reducing valves or boosting equipment, reducing the overall cost of the system. Through the intelligent regulation of the steam pressure, the system can more efficiently utilize the thermal energy in the steam, reduce energy waste, and enhance the adaptability to the needs of different users. The high-speed steam injection through the ejector can effectively convert the energy of the steam into a driving force, promote the medium circulation inside the system, and realize the full utilization of the steam energy. In addition, as a device without moving parts, the ejector has high reliability and low maintenance cost, which is conducive to the long-term stable operation of the system. Through the efficient operation of the ejector, the system can switch between cooling and heating modes more flexibly, meet the energy needs under different seasons and working conditions, and further improve the energy utilization efficiency and the economic benefits of the system.

[0083] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0084] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A cold and hot supply system, characterized in that: include: A steam extraction and ejection device, used to extract steam from the outside and eject the steam after adjusting the pressure of the steam; a heat storage heat exchanger, connected to the steam extraction and ejection device, for dividing the steam into hot steam and cold steam; a heat storage tank, connected to the heat storage heat exchanger, for receiving the hot steam; A throttle valve and a supply device, wherein the first end of the throttle valve is connected to the heat storage heat exchanger, and the second end of the throttle valve is connected to the supply device, for receiving the cold steam and transmitting the cold steam to the supply device after reducing the pressure of the cold steam to supply heat energy to the outside.

2. The cold and hot supply system according to claim 1, characterized in that: The system further includes: a first regulating valve, a second regulating valve, and a controller; The first end of the first regulating valve is communicated with the hot water storage tank, and the second end of the first regulating valve is communicated with the first end of the second regulating valve; The second end of the second regulating valve is in communication with the supply device; The heat storage heat exchanger comprises a first interface, a second interface, a third interface and a fourth interface, wherein the first interface is communicated with the steam extraction and ejection device, the second interface is communicated with the heat storage tank, the third interface is communicated with the first end of the throttle valve, and the fourth interface is communicated with the second end of the first regulating valve; The controller is electrically connected to the first regulating valve and the second regulating valve, respectively, and is used to control the first regulating valve to open and the second regulating valve to close, so as to establish a first steam cycle, or to control the first regulating valve to close and the second regulating valve to open, so as to establish a second steam cycle, wherein the first steam cycle is that the hot steam circulates between the heat storage heat exchanger and the hot water storage tank, and the second steam cycle is that the hot steam circulates between the hot water storage tank, the heat storage heat exchanger and the supply device.

3. The cold and hot supply system according to claim 2, characterized in that: The system further comprises: a third regulating valve, wherein a first end of the third regulating valve is communicated with a first end of the first regulating valve, and a second end of the third regulating valve is communicated with the supply device; The controller is electrically connected to the third regulating valve, and is used to control the third regulating valve to open when the second regulating valve is controlled to open, so as to establish the second steam cycle.

4. The cold and hot supply system according to claim 2, characterized in that: The controller is connected to the throttle valve, and is also used to obtain the working mode of the cold and hot supply system, and adjust the opening of the throttle valve according to the working mode of the cold and hot supply system, wherein the working mode includes one of a heating mode and a cooling mode, and when the cold and hot supply system is in the cooling mode, the opening of the throttle valve is greater than the opening of the throttle valve when the cold and hot supply system is in the heating mode.

5. The cold and hot supply system according to any one of claims 2 to 4, characterized in that: The supply device comprises: A cooling heat exchanger, the cooling heat exchanger comprising a first circulation pipeline and a first heat exchange pipeline, the first end of the first circulation pipeline is connected to the second end of the throttle valve, the second end of the first circulation pipeline is connected to the steam extraction and ejection device, and the first heat exchange pipeline is used to perform temperature exchange with the first circulation pipeline; An output heat exchanger is communicated with the first heat exchange pipeline and is used to supply the heat energy transferred by the first heat exchange pipeline to the outside.

6. The cold and hot supply system according to claim 5, characterized in that: The supply device also includes: a fourth regulating valve, wherein a first end of the fourth regulating valve is communicated with a first end of a first circulation pipeline of the cooling heat exchanger, and a second end of the fourth regulating valve is communicated with a second end of the first circulation pipeline of the cooling heat exchanger; The controller is electrically connected to the fourth regulating valve and is used to control the fourth regulating valve to open so as to bypass the first circulation pipeline of the cooling heat exchanger.

7. The cold and hot supply system according to claim 5, characterized in that: Also includes: The exhaust steam heat recovery heat exchanger comprises a second circulation pipeline, a first end of the second circulation pipeline is connected to the first end of the first circulation pipeline of the cooling heat exchanger, and a second end of the second circulation pipeline is connected to the steam extraction and injection device.

8. The cold and hot supply system according to claim 6, characterized in that: The system further comprises: Condenser; The exhaust steam heat recovery heat exchanger also includes a second heat exchange pipeline, a first end of the second heat exchange pipeline is connected to the steam extraction and ejection device, a second end of the second heat exchange pipeline is connected to the condenser, and the second heat exchange pipeline is used for temperature exchange with the second circulation pipeline.

9. The cold and hot supply system according to any one of claims 1 to 4, characterized in that: The steam extraction and injection device comprises: A pressure cylinder is used to adjust the pressure of the steam.

10. The cold and hot supply system according to claim 9, characterized in that: The steam extraction and injection device also includes: The ejector is connected to the pressure cylinder and is used for ejecting the steam after the pressure is adjusted.

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