Steam supply energy-saving system and method for thermal generator set
By using pressure matchers and temperature reduction devices in thermal generator sets, high-quality steam is introduced into low-quality steam, and the monitoring device adjusts the steam supply in real time, the energy waste and mismatch problems in the existing steam supply methods are solved. Achieve more efficient and economical steam supply effects.
Patent Information
- Application Number
- CN202411704574.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-02-14
AI Technical Summary
The existing thermal power generator set steam supply methods have problems such as ineffective energy depreciation and mismatch in steam supply, resulting in poor energy waste and poor economic performance.
The pressure matching device is used to induce high-quality steam to form mixed steam, and the mixed steam is adjusted through the temperature reduction device. The steam parameters are monitored in real time by using the monitoring device to accurately adjust the steam supply.
It improves the economy and accuracy of steam supply, reduces energy waste, and achieves accurate adjustment of steam supply temperature.
Smart Images
Figure CN119436099A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of energy conservation of thermal power generating sets, and in particular to a steam supply energy conservation system for thermal power generating sets and a steam supply energy conservation method for thermal power generating sets. Background Art
[0002] With the diversification of power plant operations, in addition to heating for residents, a considerable number of power plants also provide high-parameter industrial steam supply to surrounding enterprises. The energy quality of steam of various parameters generated in the production process of thermal power units is quite different. Reasonable allocation of steam quality and quantity according to the actual needs of users can not only improve energy utilization, but also improve the economic benefits of enterprises. In industrial production, valves are often used to throttle and reduce pressure of high-pressure and high-temperature steam (generally heat extraction and steam extraction) to meet user needs. Valve throttling and reducing pressure causes ineffective depreciation of energy, converting high-quality steam into low-quality steam without external work, which is a waste of energy quality. Generally, industrial steam supply units extract steam from the reheating hot section and then reduce temperature and pressure to supply industrial users. The serious mismatch between supply and demand causes huge loss of high-parameter steam work. Obviously, this steam supply method is extremely uneconomical.
[0003] At present, there are two main means to improve the energy-saving effect of industrial steam supply: one is to mix hot re-extracted steam with cold re-extracted steam and then supply it to the outside, which can effectively improve the economy of steam supply, but this method requires mixing two steams with different parameters and adding a steam-steam heat exchanger, which is expensive and has unsatisfactory heat exchange effect; the second is to add a pressure matcher to use high-quality steam to inject low-quality steam to improve the economy of steam supply. This method can improve the economy of steam supply, but there is a deviation between the steam supply temperature after injection and the demand steam temperature, and the steam supply temperature needs to be adjusted. Summary of the invention
[0004] In order to solve the above-mentioned technical defects, the present invention provides a steam supply energy-saving system and method for a thermal power generating set. The steam supply energy-saving system for a thermal power generating set uses a pressure matcher to use high-quality steam to induce low-quality steam, thereby improving the economy of steam supply, and uses a cooling device to cool the mixed steam generated by the pressure matcher to achieve steam supply temperature regulation; and uses a monitoring device to monitor the mixed steam supply, and further adjusts the amount of temperature reduction and pressure reduction of the mixed steam according to the steam parameter values of the mixed steam obtained through monitoring, so as to supply steam to users more accurately and further avoid wasting energy.
[0005] The first aspect of the present invention provides a steam supply energy-saving system for a thermal power generator set, comprising: a pressure matcher, a temperature reduction device and a monitoring device, wherein the output end of the pressure matcher is connected to the input end of the temperature reduction device through a steam pipeline, and the monitoring device is arranged in the steam pipeline; The pressure matcher is used to use the high-quality steam of the thermal power generation unit to guide the low-quality steam of the thermal power generation unit to obtain mixed steam, and output the mixed steam to the temperature reduction device through the steam pipeline; The monitoring device is used to monitor the steam parameters of the mixed steam in the steam pipeline in real time to obtain real-time steam parameter values; The temperature reduction device comprises a bypass pipeline and a temperature reduction pipeline, the output end of the pressure matcher is connected to the bypass pipeline and the temperature reduction pipeline, and a temperature reduction module is provided in the temperature reduction pipeline; When the real-time steam parameter value monitored by the monitoring device is greater than the first preset value, the pressure matcher is connected to the temperature reduction pipeline, the temperature reduction module reduces the temperature of the mixed steam, and the mixed steam after temperature reduction is used to supply steam to users; When the real-time steam parameter value monitored by the monitoring device is equal to the first preset value, the pressure matcher is connected to the bypass pipeline, and the mixed steam entering the bypass pipeline is used to supply steam to the user.
[0006] In an embodiment of the present invention, the pressure matcher includes: a pressure matcher body; The pressure matching device body comprises: an induced steam source end, a driving steam source end and a mixed steam output end; The induced steam source end is used to receive low-quality steam from a thermal power generating unit; The driving steam source end is used to receive high-quality steam from the thermal power generating set; The mixed steam output end is used to output the steam supply mixed steam.
[0007] In the embodiment of the present invention, the pressure matcher further includes: a first control module; The first control module is used to determine in real time the flow value of low-quality steam and the flow value of high-quality steam entering the pressure matcher according to the steam supply parameter value required by the user, the real-time parameter value of low-quality steam, and the real-time parameter value of high-quality steam, so that the real-time steam parameter value of the mixed steam is always greater than the second preset value.
[0008] In the embodiment of the present invention, the second preset value is greater than the first preset value, and the first preset value is the steam supply parameter value required by the user.
[0009] In an embodiment of the present invention, the temperature reduction device includes: a second control module, and the second control module is used to control the opening and closing of the bypass pipeline or the temperature reduction pipeline.
[0010] In an embodiment of the present invention, the cooling module comprises: a cooling water pipeline, a cooler and a cooling water valve; The input end of the cooling water pipeline inputs cooling water, the output end of the cooling water pipeline is connected to the cooling pipeline, and the cooling water pipeline is used to transport cooling water to the cooling pipeline. The desuperheater is used to reduce the temperature of the mixed steam in the desuperheating pipeline by using desuperheating water; The cooling water valve is arranged on the cooling water pipeline.
[0011] In an embodiment of the present invention, the second control module is used to adjust the opening of the desuperheater according to the real-time steam parameter value of the mixed steam entering the desuperheating pipeline.
[0012] A second aspect of the present invention provides a method for energy saving of steam supply to a thermal power generating set, comprising: The high-quality steam of the thermal power generating unit is used to induce the low-quality steam of the thermal power generating unit through a pressure matcher to obtain mixed steam; The steam parameters of the mixed steam are monitored in real time by a monitoring device to obtain a real-time steam parameter value; When it is determined that the real-time steam parameter value is greater than the first preset value, the cooling pipe of the cooling device is connected to the pressure matcher, the mixed steam of the cooling module in the cooling pipe is cooled, and the mixed steam after cooling is used to supply steam to the user; When it is determined that the real-time steam parameter value is equal to the first preset value, the bypass pipeline of the temperature reduction device is connected with the pressure matcher, so that the mixed steam is supplied to the user through the bypass pipeline.
[0013] In an embodiment of the present invention, the method further includes: According to the steam supply parameter value required by the user, the real-time parameter value of the low-quality steam and the real-time parameter value of the high-quality steam, the flow value of the low-quality steam and the flow value of the high-quality steam entering the pressure matcher are determined in real time, so that the real-time steam parameter value of the mixed steam is always greater than the second preset value.
[0014] In an embodiment of the present invention, the method further includes: Determine the adjustment value of the temperature reduction module according to the real-time steam parameter value of the mixed steam entering the temperature reduction pipeline, and generate an adjustment command signal; The temperature reduction module receives the adjustment instruction signal and executes the adjustment instruction signal to reduce the temperature of the mixed steam in the temperature reduction pipeline. The steam supply energy-saving system for the thermal power generating unit utilizes a pressure matcher to use high-quality steam to induce low-quality steam, thereby improving the economy of steam supply, and utilizes a cooling device to cool the mixed steam generated by the pressure matcher to achieve steam supply temperature regulation; and utilizes a monitoring device to monitor the mixed steam supply, and further adjusts the amount of temperature and pressure reduction of the mixed steam according to the steam parameter values of the mixed steam obtained through monitoring, thereby providing more accurate steam supply to users and further avoiding energy waste.
[0015] Other features and advantages of the technical solution of the present invention will be described in detail in the specific implementation section below. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a structural block diagram of a steam supply energy-saving system for a thermal power generator set provided by an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a steam supply energy-saving system for a thermal power generator set provided by an embodiment of the present invention; Figure 3 The present invention provides a flow chart of a method for energy-saving steam supply to a thermal power generating set.
[0017] Description of Reference Numerals 01-pressure matcher, 02-bypass pipeline, 03-cooling pipeline, 04-monitoring device, 05-cooling water pipeline, 06-desuperheater, 07-induced steam source end, 08-driving steam source end, 09-steam pipeline, 10-first stop valve, 11-check valve, 12-first regulating valve, 13-second stop valve. DETAILED DESCRIPTION
[0018] In order to make the technical solutions and advantages of the embodiments of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.
[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0021] In the present invention, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] In the process of realizing the present invention, the inventors found that with the diversification of power plant operations, in addition to heating for residents, a considerable number of power plants also provide high-parameter industrial steam supply to surrounding enterprises. The energy quality of steam of various parameters generated in the production process of thermal power units is quite different. Reasonable allocation of the quality and quantity of steam according to the actual needs of users can not only improve the utilization rate of energy, but also improve the economic benefits of enterprises. In industrial production, valves are often used to throttle and reduce the pressure of high-pressure and high-temperature steam (generally heat extraction and steam extraction) to meet the needs of users. Valve throttling and decompression causes ineffective depreciation of energy, converting high-quality steam into low-quality steam without external work, which is a waste of energy quality. Generally, industrial steam supply units extract steam from the reheating hot section and then reduce temperature and pressure to supply industrial users. The serious mismatch between supply and demand causes huge losses in high-parameter steam work. Obviously, this steam supply method is extremely uneconomical.
[0023] At present, there are two main means to improve the energy-saving effect of industrial steam supply: one is to mix hot re-extracted steam with cold re-extracted steam and then supply it to the outside, which can effectively improve the economy of steam supply, but this method requires mixing two steams with different parameters and adding a steam-steam heat exchanger, which is expensive and has unsatisfactory heat exchange effect; the second is to add a pressure matcher to use high-quality steam to inject low-quality steam to improve the economy of steam supply. This method can improve the economy of steam supply, but there is a deviation between the steam supply temperature after injection and the demand steam temperature, and the steam supply temperature needs to be adjusted.
[0024] In view of the above problems, an embodiment of the present invention provides a steam supply energy-saving system for a thermal power generator set, comprising: a pressure matcher, a temperature reduction device and a monitoring device, wherein the output end of the pressure matcher is connected to the input end of the temperature reduction device through a steam pipeline, and the monitoring device is arranged in the steam pipeline; the pressure matcher is used to use the high-quality steam of the thermal power generator set to induce the low-quality steam of the thermal power generator set to obtain mixed steam, and output the mixed steam to the temperature reduction device through the steam pipeline; the monitoring device is used to monitor the steam parameters of the mixed steam in real time to obtain a real-time steam parameter value; the temperature reduction device comprises a bypass pipeline and a temperature reduction pipeline, the output end of the pressure matcher is connected to the bypass pipeline or the temperature reduction pipeline, and a temperature reduction module is provided in the temperature reduction pipeline; when the real-time steam parameter value is greater than a first preset value, the pressure matcher is connected to the temperature reduction pipeline, the temperature reduction module cools the mixed steam, and the mixed steam after the temperature reduction is used to supply steam to users; when the real-time steam parameter value is equal to the first preset value, the pressure matcher is connected to the bypass pipeline, and the mixed steam entering the bypass pipeline is used to supply steam to users. The steam supply energy-saving system for the thermal power generating unit utilizes a pressure matcher to use high-quality steam to induce low-quality steam, thereby improving the economy of steam supply, and utilizes a cooling device to cool the mixed steam generated by the pressure matcher to achieve steam supply temperature regulation; and utilizes a monitoring device to monitor the mixed steam supply, and further adjusts the amount of temperature and pressure reduction of the mixed steam according to the steam parameter values of the mixed steam obtained through monitoring, thereby providing more accurate steam supply to users and further avoiding energy waste.
[0025] Figure 1 is a structural block diagram of a steam supply energy-saving system for a thermal power generator set provided by an embodiment of the present invention. Figure 2 Schematic diagram of the structure of the steam supply energy-saving system for a thermal power generator set provided by an embodiment of the present invention. Figure 1-2 As shown, a steam supply energy-saving system for a thermal power generator set provided in this embodiment includes: a pressure matcher 01, a temperature reduction device and a monitoring device 04, wherein the output end of the pressure matcher 01 is connected to the input end of the temperature reduction device through a steam pipeline 09, and the monitoring device 04 is arranged in the steam pipeline 09; The pressure matcher 01 is used to use the high-quality steam of the thermal power generation unit to guide the low-quality steam of the thermal power generation unit to obtain mixed steam, and output the mixed steam to the temperature reduction device through the steam pipeline; The monitoring device 04 is used to monitor the steam parameters of the mixed steam in real time to obtain real-time steam parameter values; The temperature reduction device includes a bypass pipe 02 and a temperature reduction pipe 03. The output end of the pressure matcher 01 is connected to the bypass pipe 02 or the temperature reduction pipe 03. The temperature reduction pipe 03 is provided with a temperature reduction module. When the real-time steam parameter value monitored by the monitoring device 04 is greater than the first preset value, the pressure matcher 01 is connected to the temperature reduction pipeline 03, and the temperature reduction module reduces the temperature of the mixed steam, and the mixed steam after temperature reduction is used to supply steam to users; When the real-time steam parameter value monitored by the monitoring device 04 is equal to the first preset value, the pressure matcher 01 is connected to the bypass pipeline 02, and the mixed steam entering the bypass pipeline 02 is used to supply steam to the user.
[0026] In this embodiment, the pressure matcher 01 uses high-quality steam to induce low-quality steam to form mixed steam. The mixed steam is of intermediate quality. The pressure matcher 01 is used to form steam of intermediate quality to provide steam supply to users. As the steam supply increases, the trend of reducing the standard coal consumption rate of the unit's power generation becomes more and more obvious, which can be more economical and energy-saving.
[0027] The mixed steam generated by the pressure matcher 01 is cooled by a cooling device to adjust the steam supply temperature; the mixed steam supply steam is monitored by a monitoring device 04, and the amount of temperature reduction and pressure reduction of the mixed steam is further adjusted according to the steam parameter values of the mixed steam obtained by monitoring, so as to supply steam to users more accurately and avoid further waste of energy.
[0028] In this embodiment, the real-time steam parameter value of the mixed steam is obtained through the monitoring module, and the real-time steam parameter value is used to determine whether the obtained mixed steam needs to be cooled, so as to obtain the steam parameters that meet the required steam supply parameters, thereby achieving the purpose of energy saving.
[0029] By setting the first preset value, the mixed steam generated by the pressure matcher 01 can be diverted, and the mixed steam whose real-time steam parameter value is greater than the first preset value can be cooled before being supplied, so as to avoid deviation between the parameter values of the generated mixed steam and the steam required by the user; for the mixed steam whose real-time steam parameter is equal to the first preset value, steam is directly supplied to the user through the bypass pipe 02, accurately meeting the steam supply demand.
[0030] In this embodiment, the first preset value is a steam parameter value of the steam supply required by the user.
[0031] In this embodiment, the real-time steam parameter value is the temperature value of the mixed steam.
[0032] In this embodiment, the pressure matcher 01 includes: a pressure matcher body; The pressure matching device body includes: an induced steam source end 07, a driving steam source end 08 and a mixed steam output end; The induced steam source end 07 is used to receive low-quality steam from the thermal power generating unit; The driving steam source end 08 is used to receive high-quality steam from the thermal power generator set; The mixed steam output end is used for outputting the mixed steam.
[0033] In the embodiment of the present invention, the pressure matcher 01 further includes: a first control module; The first control module is used to determine in real time the flow value of the low-quality steam and the flow value of the high-quality steam entering the pressure matcher 01 according to the steam supply parameter value required by the user, the real-time parameter value of the low-quality steam, and the real-time parameter value of the high-quality steam, so that the real-time steam parameter value of the mixed steam is always greater than the second preset value.
[0034] In this embodiment, the induced steam source end 07 is provided with a first regulating valve 12, the driving steam source end 08 is provided with a second regulating valve, and the first control module is used to adjust the opening of the first regulating valve 12 and the second regulating valve. The first control module adjusts the flow value of the low-quality steam and the flow value of the high-quality steam entering the pressure matcher 01 by adjusting the opening of the first regulating valve 12 and the second regulating valve.
[0035] In this embodiment, the second preset value is higher than the steam supply parameter value required by the user, in order to avoid temperature loss of the mixed steam when it flows in the steam supply pipeline, resulting in the mixed steam provided to the steam supply user not meeting the user's needs.
[0036] In this embodiment, the second preset value is greater than the first preset value, and the first preset value is the steam supply parameter value required by the user.
[0037] In the embodiment of the present invention, the temperature reduction device includes: a second control module, and the second control module is used to control the opening and closing of the bypass pipeline 02 or the temperature reduction pipeline 03.
[0038] Furthermore, shut-off valves are provided in the bypass pipe 02 and the temperature reduction pipe 03 .
[0039] In the embodiment of the present invention, the cooling module includes: a cooling water pipeline 05, a cooler 06 and a cooling water valve; The input end of the cooling water pipe 05 inputs cooling water, and the output end of the cooling water pipe 05 is connected to the cooling pipe 03. The cooling water pipe 05 is used to transport cooling water to the cooling pipe 03 to cool the mixed steam in the cooling pipe 03. The desuperheater 06 is used to reduce the temperature of the mixed steam in the desuperheating pipe 03 by using desuperheating water; The cooling water valve is arranged on the cooling water pipeline 05.
[0040] In this embodiment, the second control module is used to adjust the opening of the cooling water valve according to the real-time steam parameter value of the mixed steam entering the cooling pipe 03, thereby adjusting the cooling water flow entering the cooling pipe 03.
[0041] In this embodiment, the induced steam source end 07 is connected to the four-stage steam extraction pipeline of the thermal power generating set, and the driving steam source end 08 is connected to the hot re-extraction steam pipeline of the thermal power generating set.
[0042] In this embodiment, the induced steam source end is connected to the four-stage steam extraction pipeline through an induced steam pipeline, the first regulating valve 12 is arranged in the induced steam pipeline, and the induced steam pipeline is also provided with a first stop valve 10, a check valve 11 and a second stop valve 13. The first stop valve 10, the check valve 11, the first regulating valve 12 and the second stop valve 13 are connected in sequence.
[0043] In other embodiments of the present invention, the induced steam source end 07 is connected to the connecting pipes of the medium and low pressure cylinders, and the driving steam source end 08 is connected to the main steam pipeline 09 .
[0044] The pressure matcher 01 provided by the present invention has poor temperature adaptability under variable working conditions. It only needs to pass the mixed steam at the outlet of the pressure matcher 01 into the steam cooling nozzle to complete the cooling process without switching the steam supply source point. This avoids the problem of poor temperature adaptability of the pressure matcher 01 under variable working conditions and the need to frequently switch the steam source, thereby improving the steam supply reliability.
[0045] Figure 3 Flow chart of the method for energy saving of steam supply to a thermal power generator set provided by an embodiment of the present invention. Figure 3 As shown, this embodiment provides a method for energy saving of steam supply to a thermal power generating set, comprising: S1. Using the high-quality steam of the thermal power unit to derive the low-quality steam of the thermal power unit through the pressure matching device 0 to obtain mixed steam; S2. The steam parameters of the steam supply mixed steam are monitored in real time by the monitoring device 04 to obtain real-time steam parameter values; S3. When the real-time steam parameter value is greater than the first preset value, the cooling pipe 03 of the cooling device is connected to the pressure matcher 01, and the mixed steam is cooled by the cooling module in the cooling pipe 03, and the mixed steam after cooling is used to supply steam to the user; S4. When the real-time steam parameter value is equal to the first preset value, the bypass pipe 02 of the temperature reduction device is connected with the pressure matcher 01, and the mixed steam is supplied to the user through the bypass pipe 02.
[0046] In this embodiment, the method further includes: The first control module determines in real time the flow value of the low-quality steam and the flow value of the high-quality steam entering the pressure matcher 01 according to the steam supply parameter value required by the user, the real-time parameter value of the low-quality steam, and the real-time parameter value of the high-quality steam, so that the real-time steam parameter value of the mixed steam is always greater than the second preset value.
[0047] In this embodiment, the method further includes: The second control module determines the adjustment value of the temperature reduction module according to the real-time steam parameter value of the mixed steam entering the temperature reduction pipeline 03, and generates an adjustment command signal; The temperature reduction module receives the adjustment command signal and executes the adjustment command signal to reduce the temperature of the mixed steam in the temperature reduction pipeline 03.
[0048] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.
[0049] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.
[0050] The optional implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings. However, the implementation modes of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the implementation modes of the present invention, a variety of simple modifications can be made to the technical solutions of the implementation modes of the present invention, and these simple modifications all belong to the protection scope of the implementation modes of the present invention. It should also be noted that the various specific technical features described in the above specific implementation modes can be combined in any suitable manner without contradiction, and as long as the combination does not violate the concept of the implementation modes of the present invention, it should also be regarded as the content disclosed in the implementation modes of the present invention.
Claims
1. A steam supply energy-saving system for a thermal power generating set, characterized in that: include: A pressure matcher, a temperature reducing device and a monitoring device, wherein the output end of the pressure matcher is connected to the input end of the temperature reducing device through a steam pipeline, and the monitoring device is arranged in the steam pipeline; The pressure matcher is used to use the high-quality steam of the thermal power generation unit to guide the low-quality steam of the thermal power generation unit to obtain mixed steam, and output the mixed steam to the temperature reduction device through the steam pipeline; The monitoring device is used to monitor the steam parameters of the mixed steam in the steam pipeline in real time to obtain real-time steam parameter values; The temperature reduction device comprises a bypass pipeline and a temperature reduction pipeline, the output end of the pressure matcher is connected to the bypass pipeline and the temperature reduction pipeline, and a temperature reduction module is provided in the temperature reduction pipeline; When the real-time steam parameter value monitored by the monitoring device is greater than the first preset value, the pressure matcher is connected to the temperature reduction pipeline, the temperature reduction module reduces the temperature of the mixed steam, and the mixed steam after temperature reduction is used to supply steam to users; When the real-time steam parameter value monitored by the monitoring device is equal to the first preset value, the pressure matcher is connected to the bypass pipeline, and the mixed steam entering the bypass pipeline is used to supply steam to the user.
2. The steam supply energy-saving system for thermal power generating units according to claim 1 is characterized in that: The pressure matcher comprises: a pressure matcher body; The pressure matching device body comprises: an induced steam source end, a driving steam source end and a mixed steam output end; The induced steam source end is used to receive low-quality steam from a thermal power generating unit; The driving steam source end is used to receive high-quality steam from the thermal power generating set; The mixed steam output end is used for outputting the mixed steam.
3. The steam supply energy-saving system for thermal power generating units according to claim 2 is characterized in that: The pressure matcher also includes: a first control module; The first control module is used to determine in real time the flow value of low-quality steam and the flow value of high-quality steam entering the pressure matcher according to the steam supply parameter value required by the user, the real-time parameter value of low-quality steam, and the real-time parameter value of high-quality steam, so that the real-time steam parameter value of the mixed steam is always greater than the second preset value.
4. The steam supply energy-saving system for thermal power generating units according to claim 3 is characterized in that: The second preset value is greater than the first preset value, and the first preset value is a steam supply parameter value required by a user.
5. The steam supply energy-saving system for thermal power generating units according to claim 1, characterized in that: The temperature reduction device comprises: a second control module, and the second control module is used to control the opening and closing of the bypass pipeline or the temperature reduction pipeline.
6. The steam supply energy-saving system for thermal power generating units according to claim 5, characterized in that: The desuperheating module comprises: a desuperheating water pipeline, a desuperheater and a desuperheating water valve; The input end of the cooling water pipeline inputs cooling water, the output end of the cooling water pipeline is connected to the cooling pipeline, and the cooling water pipeline is used to transport cooling water to the cooling pipeline. The desuperheater is used to reduce the temperature of the mixed steam in the desuperheating pipeline by using desuperheating water; The cooling water valve is arranged on the cooling water pipeline.
7. The steam supply energy-saving system for thermal power generating units according to claim 6, characterized in that: The second control module is also used to adjust the opening of the desuperheater according to the real-time steam parameter value of the mixed steam entering the desuperheating pipeline.
8. A method for energy saving of steam supply to a thermal power generating set, characterized in that: include: The high-quality steam of the thermal power generating unit is used to induce the low-quality steam of the thermal power generating unit through a pressure matcher to obtain mixed steam; The steam parameters of the steam supply mixed steam are monitored in real time by a monitoring device to obtain a real-time steam parameter value; When it is determined that the real-time steam parameter value is greater than the first preset value, the cooling pipe of the cooling device is connected to the pressure matcher, the mixed steam of the cooling module in the cooling pipe is cooled, and the mixed steam after cooling is used to supply steam to the user; When it is determined that the real-time steam parameter value is equal to the first preset value, the bypass pipeline of the temperature reduction device is connected to the pressure matcher, so that the mixed steam is supplied to the user through the bypass pipeline.
9. The method for energy saving of steam supply for thermal power generating set according to claim 8, characterized in that: The method further comprises: According to the steam supply parameter value required by the user, the real-time parameter value of the low-quality steam and the real-time parameter value of the high-quality steam, the flow value of the low-quality steam and the flow value of the high-quality steam entering the pressure matcher are determined in real time, so that the real-time steam parameter value of the mixed steam is always greater than the second preset value.
10. The method for energy saving of steam supply for thermal power generating set according to claim 8, characterized in that: The method further comprises: Determine the adjustment value of the temperature reduction module according to the real-time steam parameter value of the mixed steam entering the temperature reduction pipeline, and generate an adjustment command signal; The temperature reduction module receives the adjustment command signal and executes the adjustment command signal to reduce the temperature of the mixed steam in the temperature reduction pipeline.