Power plant condenser with water replenishing atomization system

Abstract

The invention provides a power plant condenser containing a water supplementing and atomizing system, and relates to the technical field of condensers, the power plant condenser comprises a condenser main body, a water supplementing system and an atomizing system, the output end of the water supplementing system is connected with the atomizing system and used for conveying supplementing water to the atomizing system, and the output end of the atomizing system is located at the steam inlet end of the condenser main body; the spray nozzle is used for atomizing make-up water and spraying the atomized make-up water into a steam exhaust area of the condenser body; the system further comprises a water replenishing control system. Supplementary water is atomized into small particles through the atomization system, the small particles and high-temperature exhaust steam form direct atomization and water spraying mixed contact type cooling in the steam exhaust area of the condenser main body, the mode is high in heat exchange efficiency, meanwhile, separation of non-condensed gas in the steam is facilitated, the vacuum degree of the condenser is improved, the working efficiency of a steam turbine is effectively improved, and the energy consumption is reduced. And meanwhile, after atomized water drops participate in exhaust steam cooling, exhaust steam heat is taken away through evaporation heat absorption and enters the next circulation, so that the exhaust steam heat loss of the condenser is reduced, and the power generation cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of condensers, and particularly relates to a power plant condenser with a make-up water atomization system. Background Art

[0002] During the operation of a power plant, the performance of the condenser plays a crucial role in the efficiency of the entire power generation system. An excessively high exhaust temperature of the condenser will reduce the efficiency of the steam turbine, increase the heat consumption. The working mode of the condenser is to cool and condense the exhaust steam of the condenser into water through circulating water. In this process, the volume of the exhaust steam shrinks to form a vacuum, and then a part of the non-condensable gas is evacuated by a vacuum pump. The existing make-up water of the condenser is directly supplemented into the hot well of the condenser in the form of a cold source, and the following technical bottlenecks exist in this method: (1) Insufficient cooling efficiency: The make-up water does not directly participate in the exhaust steam cooling, but only indirectly exchanges heat through the circulating water, resulting in a slow decrease in the exhaust steam temperature, making it difficult to efficiently precipitate the non-condensable gas in the steam, limited improvement of the condenser vacuum degree, and a decrease in the efficiency of the steam turbine due to the high exhaust steam pressure, and insufficient room for increasing power generation. (2) Low energy utilization rate: The make-up water does not fully absorb the exhaust steam heat, resulting in a large heat loss of the condenser exhaust steam, and the coal consumption for power generation remains high, unable to meet the energy-saving and consumption-reducing requirements of the power plant. Summary of the Invention

[0003] The present invention provides a power plant condenser with a make-up water atomization system to solve at least one of the above-mentioned technical problems.

[0004] To solve the above technical problems, the present invention discloses a power plant condenser with a make-up water atomization system, which includes a condenser main body, a make-up water system, and an atomization system. The output end of the make-up water system is connected to the atomization system for delivering make-up water to the atomization system. The output end of the atomization system is located at the steam inlet end of the condenser main body for spraying the atomized make-up water into the exhaust steam area of the condenser main body. It further includes a make-up water control system, which is electrically connected to the condenser main body, the make-up water system, and the atomization system. The make-up water control system is used to adjust the working number and spray flow rate of the atomization nozzles in the atomization system according to the exhaust steam temperature of the low-pressure cylinder, the internal vacuum degree of the condenser main body, the make-up water pressure of the make-up water system, and the water level of the condenser main body.

[0005] Preferably, the make-up water system includes a make-up water tank. The inlet end of the make-up water tank is connected to a water inlet pipe. The water inlet pipe has two inlet ends. One of the water inlet ends of the water inlet pipe is communicated with the condensate storage area of the condenser main body, and the other water inlet end of the water inlet pipe is communicated with an external make-up water source. The outlet end of the make-up water tank is connected to a water outlet pipe. The output end of the water outlet pipe is communicated with the atomization pipe and the make-up water pipe of the atomization system. The atomization nozzles are installed on the atomization pipe.

[0006] Preferably, the make-up water control system includes: A data acquisition module, which is used to collect the exhaust steam temperature of the low-pressure cylinder, the internal vacuum degree of the condenser main body, the make-up water pressure of the make-up water system, and the water level of the condenser main body respectively based on the low-pressure cylinder exhaust steam temperature sensor, the vacuum degree sensor, the make-up water pressure sensor, and the water level sensor; A main control module, which is used to calculate the working number and spray flow rate of the atomizing nozzles based on the collected data of the data acquisition module; An execution control module, which is used to adjust the start-stop number and spray flow rate of the atomizing nozzles of the water level adjustment atomization system; A safety protection module, which is used to preferentially perform a water level protection operation and adjust or pause the atomization operation when it is detected that the water level of the condenser main body exceeds the safety threshold.

[0007] Preferably, the main control module includes: A control variable calculation sub-module, which is used to calculate the exhaust steam temperature deviation of the low-pressure cylinder and the internal vacuum degree deviation of the condenser main body, and output the temperature control variable and the vacuum degree control variable of the condenser main body respectively based on the temperature loop PID algorithm and the vacuum degree loop PID algorithm; A preliminary value determination sub-module, which is used to calculate the preliminary working number calculation value and the preliminary spray flow rate calculation value of the atomizing nozzles based on the temperature control variable and the vacuum degree control variable of the condenser main body; A final value determination sub-module, which is used to correct the preliminary working number calculation value and the preliminary spray flow rate calculation value of the atomizing nozzles based on the make-up water pressure correction coefficient to obtain the final values of the working number and the spray flow rate of the atomizing nozzles.

[0008] Preferably, the exhaust steam temperature deviation of the low-pressure cylinder is calculated as follows: ; where, is the exhaust steam temperature deviation of the low-pressure cylinder, is the real-time measured value of the exhaust steam temperature of the low-pressure cylinder, is the preset safety threshold of the exhaust steam temperature of the low-pressure cylinder; The internal vacuum degree deviation of the condenser main body is calculated as follows: ; where, is the internal vacuum degree deviation of the condenser main body, is the preset target value of the internal vacuum degree of the condenser main body, is the real-time measured value of the internal vacuum degree of the condenser main body; The temperature control variable of the condenser main body is calculated as follows: ; where, is the temperature control variable of the condenser main body, is the proportional coefficient of the temperature loop, is the integral coefficient of the temperature loop, is the differential coefficient of the temperature loop; The calculation of the vacuum degree control variable of the main condenser body is as follows: ; where is the vacuum degree control variable of the main condenser body, is the vacuum degree proportional coefficient, is the vacuum degree integral coefficient, is the differential coefficient of the vacuum degree loop.

[0009] Preferably, the calculated value of the initial working quantity of the atomizing nozzles: ; where is the calculated value of the initial working quantity of the atomizing nozzles, represents the rounding function, is the working quantity of the reference atomizing nozzles, is the total quantity of the atomizing nozzles; The calculated value of the initial spray flow rate of the atomizing nozzles: ; where is the initial spray flow rate of the atomizing nozzles, is the reference spray flow rate of the atomizing nozzles, is the maximum spray flow rate of the atomizing nozzles.

[0010] Preferably, the makeup water pressure correction coefficient: ; where is the makeup water pressure correction coefficient, is the measured value of the makeup water pressure of the makeup water system, is the rated makeup water pressure of the makeup water system; * ; * ⌉; where is the final value of the working quantity of the atomizing nozzles, is the final value of the spray flow rate of the atomizing nozzles.

[0011] Preferably, the safety protection module includes: A judgment sub-module for judging whether the water level of the main condenser body exceeds the safety threshold: When it is determined that it is "high water level anomaly" at this time; When it is determined that it is "low water level anomaly" at this time; where is the measured value of the water level of the main condenser body, is the upper limit safety threshold of the water level of the main condenser body, is the lower limit safety threshold of the water level of the condenser main body; A priority control sub-module, which is used to immediately override the normal output of the main control module and preferentially execute safety protection instructions when a high water level anomaly or a low water level anomaly occurs, and restore the control right of the main control module when the water level is normal; A safety protection execution sub-module, which is used to regulate the water replenishment system and the atomization system based on the priority judgment result of the priority control sub-module: When a high water level anomaly occurs, proportionally reduce the spray flow rate of the atomizing nozzles and reduce the number of working atomizing nozzles; When a low water level anomaly occurs, suspend the operation of all atomizing nozzles, calculate the emergency water replenishment volume and the emergency water replenishment flow rate, and start the water supply pipe of the water replenishment system to conduct emergency water replenishment.

[0012] Preferably, the safety protection execution sub-module includes: A high water level regulation unit, when a high water level anomaly occurs, according to the proportionality coefficient Reduce the spray flow rate: ; where is the spray flow rate of the regulated atomizing nozzle, is the current spray flow rate of the atomizing nozzle, is the flow attenuation proportionality coefficient, and reduce the number of working atomizing nozzles by x each time until ; A low water level regulation unit, when a low water level anomaly occurs, suspend the operation of all atomizing nozzles and calculate the emergency water replenishment volume: ; where is the emergency water replenishment volume, is the average cross-sectional area of the condenser main body, is the safety buffer water volume of the condenser main body; Calculate the emergency water replenishment flow rate: ; where is the emergency water replenishment flow rate, is the target water replenishment time; Control the water replenishment system to conduct water replenishment based on the calculated emergency water replenishment volume and emergency water replenishment flow rate.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention atomizes make-up water into tiny particles through an atomization system, and forms direct atomized water spray mixing contact cooling with high-temperature exhaust steam in the exhaust steam area of the main body of the condenser. This method has high heat exchange efficiency, can quickly reduce the exhaust steam temperature, is conducive to the precipitation of non-condensable gases in the steam, thereby improving the condenser vacuum degree, effectively enhancing the working efficiency of the steam turbine, increasing the power generation, and at the same time, after the atomized water droplets participate in the exhaust steam cooling, they take away the exhaust steam heat through evaporation and enter the next cycle, reducing the exhaust steam heat loss of the condenser and lowering the power generation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of a power plant condenser containing a make-up water atomization system according to the present invention.

[0015] In the figure: 1. Main body of the condenser; 2. Make-up water system; 20. Make-up water tank; 21. Inlet pipe; 22. Outlet pipe; 23. Make-up water pipe; 24. Atomization pipe; 3. Atomization system; 30. Atomizing nozzle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following describes the preferred embodiments of the present invention with reference to the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0017] In addition, in the present invention, descriptions such as "first", "second", etc. are only for descriptive purposes, and do not particularly refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those skilled in the art to implement. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0018] The present invention provides the following embodiments Embodiment 1 The embodiment of the present invention provides a power plant condenser containing a make-up water atomization system, as Figure 1As shown, it includes a condenser body 1, a water supply system 2 and an atomization system 3. The output end of the water supply system 2 is connected to the atomization system 3 for delivering supply water to the atomization system 3. The output end of the atomization system 3 is located at the steam inlet end of the condenser body 1, and is used to atomize the supply water and spray it into the exhaust area of the condenser body 1. It also includes a water replenishment control system, which is electrically connected to the condenser body 1, the water replenishment system 2 and the atomization system 3. The water replenishment control system is used to adjust the working number and spray flow rate of the atomizing nozzles 30 in the atomization system 3 according to the exhaust temperature of the low-pressure cylinder, the internal vacuum degree of the condenser body 1, the water replenishment pressure of the water replenishment system 2 and the water level of the condenser body 1.

[0019] The working principle and beneficial effects of the above technical solution are as follows: the present invention adds an atomizing system 3 on the basis of the original water supply system 2 of the condenser body 1. The atomizing system 3 atomizes the supply water into atomized water droplets by arranging an atomizing nozzle 30 above the circulating water pipeline in the exhaust area. These atomized water droplets are in full contact with the high-temperature exhaust steam in the exhaust area, and the exhaust temperature is quickly reduced by utilizing the principle of heat absorption by water evaporation, which is also beneficial to the precipitation of non-condensable gases in the steam. The arrangement of the atomizing nozzle 30 is carefully designed to ensure that the atomized water droplets evenly cover the exhaust area to achieve efficient cooling. At the same time, the present invention is equipped with a water supply control system, which can adjust the working number and spray flow rate of the atomizing nozzle 30 in the atomizing system 3 according to the exhaust temperature of the low-pressure cylinder, the internal vacuum degree of the condenser body 1, the water supply pressure of the water supply system 2 and the water level of the condenser body 1, so as to ensure the stability and accuracy of the cooling effect. The present invention atomizes the feed water into tiny particles through the atomization system 3, and forms direct atomized water spray mixed contact cooling with the high-temperature exhaust steam in the exhaust area of the condenser body 1. This method has high heat exchange efficiency and can quickly reduce the exhaust temperature. It is also beneficial to the precipitation of non-condensable gases in the steam, thereby improving the vacuum degree of the condenser, effectively improving the working efficiency of the turbine, and increasing the power generation. At the same time, after the atomized water droplets participate in the exhaust cooling, they absorb heat from the exhaust by evaporation and enter the next cycle, reducing the exhaust heat loss of the condenser and reducing the power generation cost.

[0020] Example 2 On the basis of Example 1, the make-up water system 2 includes a make-up water tank 20, and the inlet end of the make-up water tank 20 is connected to a water inlet pipe 21, and the water inlet pipe 21 has two inlet ends. One of the water inlet ends of the water inlet pipe 21 is connected to the condensate storage area of the condenser body 1, and the other water inlet end of the water inlet pipe 21 is connected to an external make-up water source. The outlet end of the make-up water tank 20 is connected to a water outlet pipe 22, and the output end of the water outlet pipe 22 is connected to the atomizing pipe 24 and the make-up water pipe 23 of the atomizing system 3, and the atomizing nozzle 30 is installed on the atomizing pipe 24.

[0021] The working principle and beneficial effects of the above technical solution are as follows: The water replenishing system 2 of the present invention includes a water replenishing tank 20, whose inlet end is respectively connected to the condensate storage area of the condenser main body 1 and the external water replenishing source through a water inlet pipe 21, and can flexibly switch the water replenishing source according to water quality and water volume requirements. The outlet end of the water replenishing tank 20 is connected to the atomizing pipe 24 and the water replenishing pipe 23 of the atomizing system 3 through a water outlet pipe 22. An atomizing nozzle 30 is installed on the atomizing pipe 24 for spraying the replenished water into the exhaust area after atomization, and the water replenishing pipe 23 is used for emergency water replenishment when the water level is abnormal; The present invention preferentially uses the condensate of the condenser main body 1 as the replenished water, reduces the extraction of external water sources, and reduces the water treatment cost; the external water source is used as a backup to ensure the continuity of water replenishment. The atomizing pipe 24 and the water replenishing pipe 23 operate independently, and the water replenishing method can be flexibly selected according to actual needs.

[0022] Embodiment 3 Based on Embodiment 1, the water replenishing control system includes: A data acquisition module, which is used to respectively acquire the exhaust temperature of the low-pressure cylinder, the internal vacuum of the condenser main body 1, the water replenishing pressure of the water replenishing system 2, and the water level of the condenser main body 1 based on the exhaust temperature sensor of the low-pressure cylinder, the vacuum sensor, the water replenishing pressure sensor, and the water level sensor; A main control module, which is used to calculate the working quantity and spraying flow rate of the atomizing nozzle 30 based on the acquisition data of the data acquisition module; An execution control module, which is used to adjust the water level and regulate the start-stop quantity and spraying flow rate of the atomizing nozzle 30 of the atomizing system 3; A safety protection module, which is used to preferentially perform a water level protection operation and adjust or pause the atomizing operation when it detects that the water level of the condenser main body 1 exceeds the safety threshold.

[0023] The working principle and beneficial effects of the above technical solution are as follows: The data acquisition module of the present invention respectively acquires the exhaust temperature, vacuum degree, water replenishing pressure of the water replenishing system 2, and the water level of the condenser main body 1 in real time through the exhaust temperature sensor of the low-pressure cylinder, the vacuum sensor, the water replenishing pressure sensor, and the water level sensor. The main control module calculates the working quantity and spraying flow rate of the atomizing nozzle 30 based on the acquisition data. The execution control module regulates the start-stop quantity and spraying flow rate of the atomizing nozzle 30. When the safety protection module detects that the water level exceeds the safety threshold, it preferentially performs a water level protection operation and adjusts or pauses the atomizing operation; The present invention integrates the exhaust temperature, vacuum degree, water replenishing pressure, and water level data, and realizes precise control of the atomizing nozzle 30 through a multi-variable algorithm, avoiding the limitations of single-parameter regulation, improving the system response speed and control accuracy, enabling real-time dynamic regulation without manual intervention, reducing operation errors, and the safety protection module preferentially intervenes when the water level is abnormal to prevent equipment failures caused by the water level exceeding the limit of the condenser main body 1 and ensuring the safe operation of the system.

[0024] Example 4 Based on Example 3, the main control module includes: A manipulation variable calculation sub-module, which is used to calculate the exhaust steam temperature deviation of the low-pressure cylinder and the internal vacuum degree deviation of the main body 1 of the condenser, and respectively output the temperature manipulation variable and the vacuum degree manipulation variable of the main body 1 of the condenser based on the temperature loop PID algorithm and the vacuum degree loop PID algorithm; A preliminary value determination sub-module, which is used to calculate the preliminary working quantity calculation value and the preliminary spray flow calculation value of the atomizing nozzle 30 based on the temperature manipulation variable and the vacuum degree manipulation variable of the main body 1 of the condenser; A final value determination sub-module, which is used to correct the preliminary working quantity calculation value and the preliminary spray flow calculation value of the atomizing nozzle 30 based on the makeup water pressure correction coefficient to obtain the final values of the working quantity and the spray flow of the atomizing nozzle 30; The exhaust steam temperature deviation of the low-pressure cylinder is calculated as follows: ; where, is the exhaust steam temperature deviation of the low-pressure cylinder, is the real-time measured value of the exhaust steam temperature of the low-pressure cylinder, is the preset safety threshold value of the exhaust steam temperature of the low-pressure cylinder; The internal vacuum degree deviation of the main body 1 of the condenser is calculated as follows: ; where, is the internal vacuum degree deviation of the main body 1 of the condenser, is the preset target value of the internal vacuum degree of the main body 1 of the condenser, is the real-time measured value of the internal vacuum degree of the main body 1 of the condenser; The temperature manipulation variable of the main body 1 of the condenser is calculated as follows: ; where, is the temperature manipulation variable of the main body 1 of the condenser, is the proportional coefficient of the temperature loop, is the integral coefficient of the temperature loop, is the differential coefficient of the temperature loop; The vacuum degree manipulation variable of the main body 1 of the condenser is calculated as follows: ; where, is the vacuum degree manipulation variable of the main body 1 of the condenser, is the proportional coefficient of the vacuum degree, is the integral coefficient of the vacuum degree, is the differential coefficient of the vacuum degree loop; The preliminary working quantity calculation value of the atomizing nozzle 30: ; where, is the calculated value of the initial working quantity of the atomizing nozzle 30, represents the rounding function, is the working quantity of the reference atomizing nozzle 30, is the total quantity of the atomizing nozzles 30; Calculated value of the initial spray flow rate of the atomizing nozzle 30: ; where, is the initial spray flow rate of the atomizing nozzle 30, is the reference spray flow rate of the atomizing nozzle 30, is the maximum spray flow rate of the atomizing nozzle 30; Make-up water pressure correction coefficient: ; where, is the make-up water pressure correction coefficient, is the measured value of the make-up water pressure of the make-up water system 2, is the rated make-up water pressure of the make-up water system 2; * ; * ⌉; where, is the final value of the working quantity of the atomizing nozzle 30, is the final value of the spray flow rate of the atomizing nozzle 30.

[0025] Working principle and beneficial effects of the above technical solution: The main control module of the present invention calculates the exhaust steam temperature deviation and vacuum degree deviation of the low-pressure cylinder through the manipulation variable calculation sub-module, and outputs the manipulation variable based on the temperature loop PID algorithm and the vacuum degree loop PID algorithm. The initial value determination sub-module calculates the initial working quantity and spray flow rate of the atomizing nozzle 30 based on the manipulation variable, and the final value determination sub-module corrects the initial value through the make-up water pressure correction coefficient to obtain the final control quantity.

[0026] Embodiment 5 On the basis of Embodiment 3, the safety protection module includes: A judgment sub-module for judging whether the water level of the condenser main body 1 exceeds the safety threshold: When it is determined that it is "high water level anomaly" at this time; When it is determined that it is "low water level anomaly" at this time; where, is the measured value of the water level of the condenser main body 1, is the upper limit safety threshold of the water level of the condenser main body 1, is the lower limit safety threshold of the water level of the condenser main body 1; The priority control sub-module is used to immediately override the normal output of the main control module and preferentially execute the safety protection instructions when a high water level anomaly or a low water level anomaly occurs, and restore the control right of the main control module when the water level is normal; The safety protection execution sub-module is used to regulate the water replenishment system 2 and the atomization system 3 based on the priority judgment result of the priority control sub-module: When a high water level anomaly occurs, the spray flow rate of the atomizing nozzles 30 is reduced proportionally, and the number of working atomizing nozzles 30 is reduced; When a low water level anomaly occurs, all the atomizing nozzles 30 are suspended from working, the emergency water replenishment volume and the emergency water replenishment flow rate are calculated, and the water replenishment pipe 23 of the water replenishment system 2 is started for emergency water replenishment.

[0027] Preferably, the safety protection execution sub-module includes: The high water level regulation unit, when a high water level anomaly occurs, according to the proportionality coefficient Reduce the spray flow rate: ; where is the spray flow rate of the regulated atomizing nozzle 30, is the current spray flow rate of the atomizing nozzle 30, is the flow rate decay proportionality coefficient, and the number of working atomizing nozzles 30 is reduced by x each time until ; The low water level regulation unit, when a low water level anomaly occurs, suspends all the atomizing nozzles 30 from working and calculates the emergency water replenishment volume: ; where is the emergency water replenishment volume, is the average cross-sectional area of the main body 1 of the condenser, is the safety buffer water volume of the main body 1 of the condenser; Calculate the emergency water replenishment flow rate: ; where is the emergency water replenishment flow rate, is the target water replenishment time; Control the water replenishment system 2 to replenish water based on the calculated emergency water replenishment volume and emergency water replenishment flow rate.

[0028] The working principle and beneficial effects of the above technical solution are: The judgment sub-module of the safety protection module of the present invention compares the water level measurement value of the main body 1 of the condenser with the upper water level safety threshold and the lower water level safety threshold in real time. When , it is determined that "high water level anomaly" occurs at this time. At this time, the control module reduces the spray flow rate and the number of working atomizing nozzles 30 proportionally. When When it is determined that it is "low water level anomaly" at this time, all atomizing nozzles 30 are suspended, the emergency water replenishment volume and water replenishment flow rate are calculated, and the emergency water replenishment of the water replenishment pipe 23 is started; Through real-time monitoring of the water level threshold and the priority protection logic, the present invention avoids accidents such as steam turbine water hammer and dry burning caused by water overflow or shortage in the main body 1 of the condenser. When the water level is high, the flow rate is attenuated proportionally to avoid a sudden drop in the vacuum degree. When the water level is low, emergency water replenishment is carried out at the maximum flow rate, and the water replenishment speed is increased by 50% to prevent water level fluctuations and enhance the system stability.

[0029] 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 equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A condenser for a power plant with a water replenishing atomization system, characterized in that: It includes a condenser main body (1), a make-up water system (2) and an atomization system (3). The output end of the make-up water system (2) is connected to the atomization system (3) for delivering make-up water to the atomization system (3). The output end of the atomization system (3) is located at the steam inlet end of the condenser main body (1) and is used for spraying the atomized make-up water into the exhaust steam area of the condenser main body (1). It also includes a make-up water control system. The make-up water control system is electrically connected to the condenser main body (1), the make-up water system (2) and the atomization system (3). The make-up water control system is used to adjust the working number and spray flow rate of the atomization nozzles (30) in the atomization system (3) according to the exhaust steam temperature of the low-pressure cylinder, the internal vacuum degree of the condenser main body (1), the make-up water pressure of the make-up water system (2) and the water level of the condenser main body (1).

2. The steam condenser of a power plant with a water replenishing atomization system according to claim 1, characterized in that: The make-up water system (2) includes a make-up water tank (20). The inlet end of the make-up water tank (20) is connected with a water inlet pipe (21). The water inlet pipe (21) has two inlet ends. One of the water inlet ends of the water inlet pipe (21) is communicated with the condensate storage area of the condenser main body (1), and the other water inlet end of the water inlet pipe (21) is communicated with an external make-up water source. The outlet end of the make-up water tank (20) is connected with a water outlet pipe (22). The output end of the water outlet pipe (22) is communicated with the atomization pipe (24) and the make-up water pipe (23) of the atomization system (3). The atomization nozzles (30) are installed on the atomization pipe (24).

3. A condenser for a power plant comprising a water replenishment atomization system according to claim 1, characterized in that: The make-up water control system includes: A data acquisition module, which is used to respectively acquire the exhaust steam temperature of the low-pressure cylinder, the internal vacuum degree of the condenser main body (1), the make-up water pressure of the make-up water system (2) and the water level of the condenser main body (1) based on a low-pressure cylinder exhaust steam temperature sensor, a vacuum degree sensor, a make-up water pressure sensor and a water level sensor. A main control module, which is used to calculate the working number and spray flow rate of the atomization nozzles (30) based on the acquisition data of the data acquisition module. An execution control module, which is used to adjust the start-stop number and spray flow rate of the atomization nozzles (30) of the water level adjustment atomization system (3). A safety protection module, which is used to preferentially perform a water level protection operation and adjust or suspend the atomization operation when it is detected that the water level of the condenser main body (1) exceeds the safety threshold.

4. A power plant condenser with a water replenishing atomization system according to claim 3, characterized in that: The main control module includes: A control variable calculation sub-module, which is used to calculate the exhaust steam temperature deviation of the low-pressure cylinder and the internal vacuum degree deviation of the condenser main body (1), and respectively output the temperature control variable and the vacuum degree control variable of the condenser main body (1) based on the temperature loop PID algorithm and the vacuum degree loop PID algorithm. A preliminary value determination sub-module, which is used to calculate the preliminary working number calculation value and the preliminary spray flow rate calculation value of the atomization nozzles (30) based on the temperature control variable and the vacuum degree control variable of the condenser main body (1). A final value determination sub-module, which is used to correct the preliminary working number calculation value and the preliminary spray flow rate calculation value of the atomization nozzles (30) based on the make-up water pressure correction coefficient to obtain the final values of the working number and the spray flow rate of the atomization nozzles (30).

5. The steam condenser for power plant with a water replenishing atomization system according to claim 4, characterized in that: The calculation of the exhaust steam temperature deviation of the low-pressure cylinder is as follows: ; wherein, is the exhaust steam temperature deviation of the low-pressure cylinder, is the real-time measured value of the exhaust steam temperature of the low-pressure cylinder, is the preset safety threshold of the exhaust steam temperature of the low-pressure cylinder; The calculation of the internal vacuum degree deviation of the condenser main body (1) is as follows: ; wherein, is the internal vacuum degree deviation of the condenser main body (1), is the preset target value of the internal vacuum degree of the condenser main body (1), is the real-time measured value of the internal vacuum degree of the condenser main body (1); The temperature control variable of the condenser main body (1) is calculated as follows: ; among them, is the temperature control variable of the condenser main body (1), is the proportional coefficient of the temperature loop, is the integral coefficient of the temperature loop, is the differential coefficient of the temperature loop; The vacuum degree control variable of the condenser main body (1) is calculated as follows: ; among which, is the vacuum degree control variable of the condenser main body (1), is the vacuum degree proportionality coefficient, is the vacuum degree integral coefficient, is the vacuum degree loop differential coefficient.

6. The steam condenser of a power plant with a water replenishing atomization system according to claim 5, characterized in that: The preliminary working quantity calculated value of the atomizing nozzle (30): ; wherein, is the calculated value of the initial working quantity of the atomizing nozzle (30), represents the rounding function, is the working quantity of the reference atomizing nozzle (30), is the total quantity of the atomizing nozzles (30); The preliminary spray flow rate calculated value of the atomizing nozzle (30): ; wherein, is the initial spray flow rate of the atomizing nozzle (30), is the reference spray flow rate of the atomizing nozzle (30), is the maximum spray flow rate of the atomizing nozzle (30).

7. The steam condenser of a power plant with a water replenishing atomization system according to claim 6, wherein: Make-up water pressure correction coefficient: ; wherein, is the make-up water pressure correction coefficient, is the measured make-up water pressure value of the make-up water system (2), is the rated make-up water pressure of the make-up water system (2); * ； * ⌉; wherein, is the final value of the working quantity of the atomizing nozzle (30), is the final value of the spraying flow rate of the atomizing nozzle (30).

8. The steam condenser for a power plant with a water replenishing atomization system according to claim 3, characterized in that: The safety protection module includes: A judgment sub-module, used to judge whether the water level of the condenser main body (1) exceeds the safety threshold: When it is determined that this is a "high water level anomaly" at this time; When it is determined that this is "low water level anomaly" at this time; among them, is the water level measurement value of the main body (1) of the condenser, is the upper safety threshold of the water level of the main body (1) of the condenser, is the lower safety threshold of the water level of the main body (1) of the condenser; A priority control sub-module, used to immediately override the normal output of the main control module and preferentially execute the safety protection instruction when a high water level anomaly or a low water level anomaly occurs, and restore the control right of the main control module when the water level is normal; A safety protection execution sub-module, used to regulate the make-up water system (2) and the atomizing system (3) based on the priority judgment result of the priority control sub-module: When a high water level anomaly occurs, proportionally reduce the spray flow rate of the atomizing nozzle (30) and reduce the working quantity of the atomizing nozzle (30); When a low water level anomaly occurs, suspend the operation of all atomizing nozzles (30), calculate the emergency make-up water quantity and the emergency make-up water flow rate, and start the make-up water pipe (23) of the make-up water system (2) to conduct emergency make-up water.

9. The steam condenser of a power plant with a water replenishing atomization system according to claim 8, wherein: The safety protection execution sub-module includes: High water level control unit, when the high water level is abnormal, according to the proportionality coefficient Reduce the spray flow rate: ; wherein, is the spray flow rate of the atomizing nozzle (30) after regulation, is the spray flow rate of the current atomizing nozzle (30), is the flow attenuation proportionality coefficient. Each time the number of working atomizing nozzles (30) is reduced by x until ; A low water level regulation unit, when a low water level anomaly occurs, suspend the operation of all atomizing nozzles (30) and calculate the emergency make-up water quantity: ; among them, is the emergency makeup water volume, is the average cross-sectional area of the main body (1) of the condenser, is the safety buffer water volume of the main body (1) of the condenser; Calculate the emergency make-up water flow rate: ; wherein, is the emergency water replenishment flow rate, is the target water replenishment time; Control the make-up water system (2) to conduct make-up water based on the calculated emergency make-up water quantity and the emergency make-up water flow rate.

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