Heating system of steam compressor
The steam compressor heating system addresses steam leakage and environmental compliance by using nuclear power main steam to generate superheated steam for industrial heating, ensuring safe and efficient heat supply.
Patent Information
- Application Number
- CN202411217099.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2024-12-13
AI Technical Summary
Current high-pressure steam compressors in the industrial heating sector face challenges in integrating with nuclear power plants due to steam leakage issues and limited research on system and equipment coupling, which violates environmental regulations and affects efficient heat supply.
A steam compressor heating system with a heat exchange section and heating section that utilizes nuclear power main steam as a heat source, incorporating a superheater, evaporator, secondary and primary heat exchange sections, and a deaerator to generate superheated steam, while preventing steam leakage and managing exhaust steam through multiple pipelines and valves.
Ensures safe and efficient heat supply to downstream networks by preventing steam leakage, optimizing steam distribution, and enhancing system efficiency through heat recovery and flexible heating adjustments.
Smart Images
Figure CN119123407A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of high-pressure steam compressors, and in particular to a steam compressor heating system. Background Art
[0002] In the current high-pressure, high-temperature industrial heating sector, non-renewable energy accounts for a high proportion of conventional heating. Faced with the current shift towards new energy sources, the conflict between emission reduction requirements and supply demand in the industrial heating sector has become increasingly prominent. Nuclear main steam, due to its parameter characteristics that are more suitable for meeting high-pressure and high-temperature heating needs, has attracted considerable research attention.
[0003] As the exploration of compressor equipment and systems deepens, the high-pressure steam compression unit developed in combination with high-temperature and high-pressure materials can fill the equipment gap in the supply of high-parameter steam for nuclear main steam, and the heating system formed around it can also stably supply high-quality clean hot steam to downstream users.
[0004] However, there has been limited research on the system and equipment aspects of coupling high-pressure steam compressors with nuclear power plant main steam for heat output. Furthermore, nuclear power plants have strict environmental regulations, prohibiting external steam leakage. However, high-pressure steam compressor systems have numerous steam leakage points. In addition to the surge and emergency relief systems necessary to ensure safe system operation, steam leakage from the compressor shaft also needs to be discharged and centrally managed. Summary of the Invention
[0005] In response to the above problems in the prior art, the present invention proposes a steam compressor heating system that can ensure that the main steam of nuclear power does not leak out, and its heat is replaced and applied to the high-pressure steam compressor operating system, and can supply heat to the downstream heating network.
[0006] Specifically, the present invention proposes a steam compressor heating system, comprising:
[0007] a heat exchange section comprising a superheater, an evaporator, a secondary heat exchange section, a primary heat exchange section, and a deaerator connected by pipelines, and having a first path from the superheater, the evaporator, and the secondary heat exchange section to the primary heat exchange section, a second path from the primary heat exchange section and the deaerator to the secondary heat exchange section, and a circulating temperature-raising loop including the secondary heat exchange section, the evaporator, the superheater, and the deaerator, wherein the first path is used for circulating a hot-end working medium, and the second path and the circulating temperature-raising loop are used for circulating a cold-end working medium, wherein the cold-end working medium generates a superheated working medium after heat exchange with the hot-end working medium in the heat exchange section;
[0008] The heating section includes a high-pressure steam compressor operating system, which includes a steam compressor and an inlet pipeline and a first exhaust pipeline connected to the steam compressor. The inlet pipeline is used to send the superheated working medium into the steam compressor, and the steam compressor sends steam into the downstream heating network through the first exhaust pipeline.
[0009] According to one embodiment of the present invention, the hot end working medium is the main steam of the nuclear power system, and the main steam flows into the condenser of the nuclear power system after passing through the first path. The cold end working medium is desalted water, and the desalted water flows into the heat exchange section through the second path, and then forms superheated steam through continuous heating in the circulating heating loop.
[0010] According to one embodiment of the present invention, the steam compressor heating system further comprises a drain device provided on the first path and on the pipeline between the evaporator and the secondary heat exchange section, wherein the drain device is used to eliminate condensed water in the pipeline.
[0011] According to one embodiment of the present invention, the steam compressor heating system further includes a water pump provided on the pipelines between the deaerator and the secondary heat exchange section.
[0012] According to one embodiment of the present invention, the steam compressor heating system further includes a heating device and a first regulating valve provided on the inlet pipeline.
[0013] According to one embodiment of the present invention, the steam compressor heating system further includes a second regulating valve provided on the first exhaust pipe.
[0014] According to one embodiment of the present invention, the steam compressor heating system, the high-pressure steam compressor operation system further includes a second exhaust pipe connected to the steam compressor, the second exhaust pipe being used to introduce steam into the deaerator;
[0015] If the demand of the downstream heat network is less than the exhaust flow of the current high-pressure steam compressor operating system, the compressor heating system introduces excess exhaust flow into the deaerator through the second exhaust pipeline.
[0016] According to one embodiment of the present invention, the steam compressor heating system further includes an outlet isolation valve and a check valve arranged in series on the second exhaust pipe.
[0017] According to one embodiment of the present invention, the high-pressure steam compressor operation system further includes a third exhaust pipe connected to the steam compressor, and an anti-surge valve is provided on the third exhaust pipe for releasing the rear end steam pressure of the steam compressor.
[0018] According to one embodiment of the present invention, the high-pressure steam compressor operating system further includes a fourth exhaust pipe connected to the steam compressor. An emergency relief valve is provided on the fourth exhaust pipe to ensure a stable pressure environment of the steam compressor.
[0019] The present invention provides a steam compressor heating system, which is provided with a heat exchange section and a heat supply section. Heat exchange is performed between a hot-end working medium and a cold-end working medium through the heat exchange section, so that the cold-end working medium generates a superheated working medium. The superheated working medium is applied to a high-pressure steam compressor operating system. The exhaust steam of the high-pressure steam compressor operating system can supply heat to a downstream heating network. The steam compressor heating system can ensure that the hot-end working medium does not leak.
[0020] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The accompanying drawings are included to provide further explanation of the present invention and are incorporated into and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with the description serve to explain the principle of the present invention.
[0022] In the attached figure:
[0023] Figure 1 A schematic structural diagram of a heat exchange section of a steam compressor heating system according to an embodiment of the present invention is shown.
[0024] Figure 2 A schematic structural diagram of a heating section of a steam compressor heating system according to an embodiment of the present invention is shown.
[0025] The above drawings include the following reference numerals:
[0026] Heat exchange section 101
[0027] Heating section 102
[0028] Downstream heating network 103
[0029] Superheater 104
[0030] Evaporator 105
[0031] Secondary heat exchange section 106
[0032] First-stage heat exchange section 107
[0033] Deaerator 108
[0034] Steam compressor 109
[0035] Inlet pipe 110
[0036] The first exhaust pipe 111
[0037] Condenser 112
[0038] Drainage equipment 113
[0039] Water pump 114
[0040] Heating device 115
[0041] First regulating valve 116
[0042] Inlet isolation valve 117
[0043] Second regulating valve 118
[0044] Second exhaust pipe 119
[0045] Outlet isolation valve 120
[0046] Check valve 121
[0047] The third exhaust pipe 122
[0048] Anti-surge valve 123
[0049] Fourth exhaust pipe 124
[0050] Emergency relief valve 125 DETAILED DESCRIPTION
[0051] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.
[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0053] 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0054] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. Meanwhile, 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 actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the 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 can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0055] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.
[0056] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. Furthermore, while the terms used in this application are selected from commonly known and commonly used terms, some terms mentioned in this specification may have been selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of this description. Furthermore, this application should be understood not only by the actual terms used, but also by the meaning implied by each term.
[0057] Figure 1 A schematic structural diagram of a heat exchange section of a steam compressor heating system according to an embodiment of the present invention is shown. Figure 2The figure shows a schematic diagram of the heating section of a steam compressor heating system according to one embodiment of the present invention. Identical letters A and C in the figure represent identical nodes. The present invention provides a steam compressor heating system suitable for use with a high-temperature, high-pressure steam compressor, primarily comprising a heat exchange section 101 and a heating section 102. The heat exchange section 101 is used to provide heat exchange between a hot-end working medium and a cold-end working medium, thereby generating a superheated working medium from the cold-end working medium. The heating section 102 is used to introduce the superheated working medium and supply heat to a downstream heating network 103 via the high-pressure steam compressor operating system.
[0058] Among them, Figure 1 As shown, heat exchange section 101 includes a superheater 104, an evaporator 105, a secondary heat exchange section 106, a primary heat exchange section 107, and a deaerator 108, connected by pipelines. Heat exchange section 101 has a first path from superheater 104, evaporator 105, secondary heat exchange section 106 to primary heat exchange section 107; a second path from primary heat exchange section 107, deaerator 108 to secondary heat exchange section 106; and a circulating heating loop including secondary heat exchange section 106, evaporator 105, superheater 104, and deaerator 108. The first path circulates hot-end working fluid, while the second path and the circulating heating loop circulate cold-end working fluid. The cold-end working fluid undergoes heat exchange with the hot-end working fluid in the superheater 104, evaporator 105, secondary heat exchange section 106, and primary heat exchange section 107 of the heat exchange section to generate superheated working fluid. The cold-end working medium that has undergone heat exchange in the superheater 104 for the first time enters the deaerator 108 again to improve the working medium quality. The cold-end working medium continues to undergo heat exchange in the secondary heat exchange section 106 to continue to increase its temperature. The heated cold-end working medium passes through the evaporator 105 to complete the phase change from water to steam. At this time, the steam at the outlet of the evaporator 105 is in a saturated state and still does not meet the conditions for steam compression. It then continues to absorb heat in the superheater 104 and outputs the superheated working medium through the superheater 104. By providing superheated working medium that matches the needs of the heating section 102 through the cyclic heating loop, the deaerator 108 can complete the absorption of excess flow.
[0059] In general, the heat exchange section 101 is used to provide a hot-end working medium and a cold-end working medium for heat exchange, and the cold-end working medium generates a superheated working medium that matches the demand of the heating section 102 .
[0060] In one embodiment, the hot-end working medium is the main steam generated by the nuclear power system. After releasing all of its heat through the first path of the heat exchange section 101, the main steam is then fed into the condenser 112 of the nuclear power system. The cold-end working medium is demineralized water. After entering the heat exchange section 101 through the second path, the demineralized water is continuously heated in the circulatory heating loop to form a superheated working medium, namely, superheated steam.
[0061] The heating section 102 includes a high-pressure steam compressor operating system. This system includes a steam compressor 109, an inlet pipeline 110 connected to the steam compressor 109, and a first exhaust pipeline 111. One end of the inlet pipeline 110 connects to node C, and the other end connects to the inlet of the steam compressor 109. Node C is located downstream of the junction between the superheater 104 and the deaerator 108. One end of the first exhaust pipeline 111 connects to a process valve on the steam compressor 109, and the other end connects to the downstream heating network 103. Superheated fluid is delivered to the steam compressor 109 through the inlet pipeline 110 to increase its temperature and pressure. The steam compressor 109 delivers clean steam to the downstream heating network 103 through the first exhaust pipeline 111.
[0062] It is easy to understand that the present invention adopts a relatively wide range of heat exchange circuit concepts and designs a heat exchange section 101 to meet the environmental protection needs of nuclear energy, ensuring that the main steam does not leak out, and uses its heat to replace the heated desalted water and apply it to the high-pressure steam compressor operating system, thereby supplying heat to the downstream heat network 103.
[0063] In one embodiment, a drain device 113 is provided on the pipeline on the first path of the heat exchange section 101 and between the evaporator 105 and the secondary heat exchange section 106. The drain device 113 is used to remove condensed water in the pipeline.
[0064] In one embodiment, a water pump 114 is provided on the pipeline between the deaerator 108 and the secondary heat exchange section 106. The water pump 114 is used to boost the pressure of the cold end working medium passing through the deaerator 108 and then send it to the secondary heat exchange section 106.
[0065] Preferably, a heating device 115 and a first regulating valve 116 are provided on the inlet pipeline 110 of the steam compressor 109. Taking into account the potential for on-site losses of the superheated working fluid provided by the heat exchange section 101, the steam is heated by the heating device 115. Under the regulation and control of the first regulating valve 116, the superheated working fluid is adjusted to match the inlet parameters of the steam compressor 109. An inlet isolation valve 117 is also provided on the inlet pipeline 110 near the steam compressor 109 to open or close the inlet pipeline 110.
[0066] Preferably, a second regulating valve 118 is provided on the first exhaust steam pipeline 111. The high-pressure steam compressor operating system provides high-quality clean hot steam to the downstream heating network 103 through the second regulating valve 118. The second regulating valve 118 is controlled to provide the steam flow required by the downstream heating network 103. It should be noted that the clean hot steam includes steam leaks from various locations of the steam compressor 109. The leaked steam from each section can be collected and distributed to different users in the downstream heating network 103 according to the pressure level. For example, higher pressure levels such as 2-4 MPa can be designed to be sent to the water pump turbine of the downstream heating network 103, and lower pressure levels such as 0.3-0.5 MPa can be sent to the city heating network to ensure heating for residents.
[0067] Preferably, the high-pressure steam compressor operating system further includes a second exhaust steam line 119 connected to the steam compressor 109. The second exhaust steam line 119 is connected to the deaerator 108 and is used to introduce steam into the deaerator 108. If the demand of the downstream heating network 103 is less than the current exhaust steam flow of the high-pressure steam compressor operating system, the steam compressor heating system introduces the excess exhaust steam flow into the deaerator 108 of the heat exchange section 101 via the second exhaust steam line 119. As will be readily understood, the high-pressure steam compressor operating system, through a control algorithm, reintroduces the excess steam flow into the deaerator 108 while meeting the demand of the downstream heating network 103. The excess steam flow is then used to reheat the cold-end working fluid to generate the superheated working fluid required by the steam compressor 109, thereby achieving heat energy recovery and further improving the efficiency of the steam compressor heating system. By way of example and not limitation, the second exhaust steam line 119 can introduce steam directly into the high-pressure steam compressor operating system. More preferably, an outlet isolation valve 120 and a check valve 121 are provided in series on the second exhaust steam pipeline 119 to effectively control steam discharge.
[0068] Preferably, the high-pressure steam compressor operating system further includes a third exhaust pipe 122 connected to the steam compressor 109. An anti-surge valve 123 is provided on the third exhaust pipe 122 to release the steam pressure at the rear end of the steam compressor 109, thereby ensuring the operation of the steam compressor 109 and preventing surge.
[0069] Preferably, the high-pressure steam compressor operating system also includes a fourth exhaust pipe 124 connected to the steam compressor 109. An emergency relief valve 125 is provided on the fourth exhaust pipe 124 to ensure a stable pressure environment in the steam compressor 109. Furthermore, the steam compressor heating system matches the heating demand of the downstream heating network 103 through the coordinated regulation of the inlet isolation valve 117, the second regulating valve 118, the outlet isolation valve 120, the anti-surge valve 123, and the emergency relief valve 125.
[0070] The steam compressor heating system provided by the present invention uses the main steam of the nuclear power system as the heat source to supply heat to the downstream heating network, and has the following advantages:
[0071] In terms of main steam utilization, a heat exchange section is designed to prevent leakage of main steam. This section not only meets the environmental protection requirements of nuclear energy, but also meets the leakage requirements of the heating section. The heat exchange section is combined with the heating section to ensure the safe operation of the entire system.
[0072] In terms of external heat supply, the goal is to meet the needs of the downstream heat network. By utilizing the superheated steam output from the heat exchange section, combined with the characteristics of high-parameter steam, and taking into account various losses in the site layout, the requirements for stable operation of the steam compressor start-up and shutdown, and the requirements for safe operation of the steam compressor, the open system configuration of the high-pressure steam compressor operation system is completed. The process valves, anti-surge valves, and emergency relief valves of the inlet and exhaust pipelines can be linked and adjusted to match the heat and steam supply needs.
[0073] Heat recovery is used to further improve system efficiency. This involves reallocating flow based on downstream heat network demand. If demand is less than the minimum flow rate that the steam compressor can adjust, the system uses a control algorithm to divert excess flow and reintroduce it into the deaerator, using the heat to reheat the steam inlet to the steam compressor.
[0074] Flexible heating: steam leakage at various locations in the steam compressor can be graded according to the pressure gradient and distributed to different users in the downstream heating network.
[0075] It will be apparent to those skilled in the art that various modifications and variations may be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.
Claims
1. A steam compressor heating system, comprising: A heat exchange section, comprising a superheater, an evaporator, a secondary heat exchange section, a primary heat exchange section and a deaerator connected by pipelines, and having a first path from the superheater, the evaporator, the secondary heat exchange section to the primary heat exchange section, a second path from the primary heat exchange section, the deaerator to the secondary heat exchange section, and a circulating temperature increase loop including the secondary heat exchange section, the evaporator, the superheater and the deaerator, wherein the first path is used for circulating hot-end working fluid, and the second path and the circulating temperature increase loop are used for circulating cold-end working fluid, wherein the cold-end working fluid generates a superheated working fluid after heat exchange with the hot-end working fluid in the heat exchange section; The heating section includes a high-pressure steam compressor operating system, which includes a steam compressor and an inlet pipeline and a first exhaust pipeline connected to the steam compressor. The inlet pipeline is used to deliver the superheated working medium into the steam compressor, and the steam compressor delivers steam into the downstream heating network through the first exhaust pipeline.
2. The steam compressor heating system according to claim 1, characterized in that: The hot end working medium is the main steam of the nuclear power system, and the main steam flows into the condenser of the nuclear power system after passing through the first path. The cold end working medium is desalted water, and the desalted water flows into the heat exchange section through the second path, and then forms superheated steam through continuous heating in the circulating heating loop.
3. The steam compressor heating system according to claim 1, characterized in that: It also includes a drain device which is arranged on the first path and located on the pipeline between the evaporator and the secondary heat exchange section, and the drain device is used to eliminate condensed water in the pipeline.
4. The steam compressor heating system according to claim 1, characterized in that: It also includes a water pump arranged on the pipelines of the deaerator and the secondary heat exchange section.
5. The steam compressor heating system according to claim 1, characterized in that: It also includes a heating device and a first regulating valve arranged on the inlet pipeline.
6. The steam compressor heating system according to claim 5, characterized in that: It also includes a second regulating valve arranged on the first exhaust steam pipeline.
7. The steam compressor heating system according to claim 1, characterized in that: The high-pressure steam compressor operation system further includes a second exhaust pipe connected to the steam compressor, wherein the second exhaust pipe is used to introduce steam into the deaerator; If the demand of the downstream heat network is less than the exhaust flow of the current high-pressure steam compressor operating system, the compressor heating system introduces excess exhaust flow into the deaerator through the second exhaust pipeline.
8. The steam compressor heating system according to claim 7, characterized in that: It also includes an outlet isolation valve and a check valve arranged in series on the second exhaust steam pipeline.
9. The steam compressor heating system according to claim 8, characterized in that: The high-pressure steam compressor operation system also includes a third exhaust pipeline connected to the steam compressor, and an anti-surge valve is provided on the third exhaust pipeline for releasing the rear end steam pressure of the steam compressor.
10. The steam compressor heating system according to claim 8, characterized in that: The high-pressure steam compressor operation system also includes a fourth exhaust pipe connected to the steam compressor. An emergency relief valve is provided on the fourth exhaust pipe to ensure a stable pressure environment of the steam compressor.