Operation monitoring and evaluating system applied to dead steam heating system of air cooling unit

Abstract

The utility model relates to the technical field of air cooling unit operation systems, and discloses an operation monitoring and evaluating system applied to a dead steam heating system of an air cooling unit. The operation condition of the heating system is monitored in real time through measuring modules and adjusting modules arranged on pipelines of a high-back-pressure condenser system, a dead steam upgrading system and a heat supply network heater system in the dead steam heating system and a software module arranged in a DCS (Distributed Control System), the operation efficiency of the system is analyzed and evaluated, and an operator can monitor the operation efficiency of the heating system according to the prompt of the system. System parameters of all levels are manually adjusted, and the best efficiency of the steam exhaust system is achieved on the premise that heating is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air-cooling unit operation systems, in particular to an operation monitoring and evaluation system applied to an exhaust steam heating system of an air-cooling unit. Background Art

[0002] In recent years, based on the demand for urban centralized heating, the country's requirements for improving urban atmospheric environmental quality, protecting the ecological environment and saving energy, the technology of recycling the exhaust heat of steam turbine generator sets to heat the city has been continuously developed and promoted without increasing the amount of coal burned by power plants and environmental emissions, turning waste into treasure and further improving the external heating capacity of power plants. At the same time, the units that use high back pressure and steam injection exhaust steam heating technology have greatly improved their heating capacity and achieved significant energy-saving and environmental protection benefits.

[0003] The exhaust steam recovery cascade heating system of the air-cooled unit includes a condenser (exhaust device) connected to the low-pressure cylinder of the air-cooled steam turbine. The low-pressure cylinder of the steam turbine is connected to the high- and medium-pressure cylinders of the steam turbine through a connecting pipe. The connecting pipe is connected to the exhaust steam stripping equipment as power steam and the heat network heater as heating steam through a steam extraction pipe. The exhaust steam of the low-pressure cylinder of the steam turbine is respectively connected to the high back pressure condenser and the exhaust steam stripping equipment for recycling. The exhaust steam stripping equipment is connected in parallel with the steam side of the high back pressure condenser and in series with the water side. The circulating water return of the heat network passes through the high back pressure condenser, the exhaust steam stripping heat exchanger and the heat network heater in turn, and the latent heat of the exhaust steam is recovered to achieve step-by-step heating.

[0004] The requirements for the operation of this heating system are also increased accordingly. Increasing the back pressure of the unit will increase the heating capacity, but it will also increase the heating coal consumption of the unit. How to effectively control and coordinate the operation of the heating network and steam turbine units during operation to optimize the unit efficiency has become a problem that power plant operators need to face. Utility Model Content

[0005] The purpose of the utility model is to provide an operation monitoring and evaluation system with a setting module and a regulating module for use in an exhaust steam heating system of an air-cooled unit, which has the characteristics of simple structure, real-time monitoring, and safe operation, so as to solve the problems raised in the above background technology. The measuring module includes various flow measuring devices, temperature measuring devices, and pressure measuring devices; the regulating module includes regulating valves and their actuators on various pipelines.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an operation monitoring and evaluation system applied to the exhaust steam heating system of an air-cooled unit, comprising a high back pressure condenser system, an exhaust steam stripping system and a heat network heater system, wherein the heat network heater system comprises a heat network heater for performing final stage heating of the heat network circulating water, a heat network heater extraction flow regulating valve is arranged on the steam extraction pipeline for regulating the steam inlet amount of the heat network heater, and the heat network heater is connected to an external heat network water pipeline;

[0007] Set up a measurement module to measure the steam temperature and pressure of the steam supply pipeline, measure the inlet and outlet temperature and pressure of the heating network water, and transmit them to the external terminal;

[0008] The extraction steam inlet flow measurement device of the heating network heater is set on the extraction steam inlet pipeline of the heating network heater to measure the steam flow of the steam supply pipeline and transmit it to the external terminal. Through the measurement module and the measurement device, the real-time operation data is transmitted to the external terminal software module, which is convenient for the software module of the external terminal to judge whether the final heating network water supply temperature meets the requirements, and analyze and calculate the heating supply of the heating network heater, the steam exhaust volume during consumption and the third-level heating efficiency.

[0009] It also includes a high back-pressure condenser system, in which the steam side of the high back-pressure condenser is connected to the external steam turbine exhaust device through a pipeline; the water side of the high back-pressure condenser is connected to the heat network water pipeline through a pipeline; the high back-pressure condenser drain is connected to the hot well of the external steam turbine exhaust device through a pipeline; and the vacuum system is connected to the vacuum pump inlet of the power plant through a pipeline.

[0010] A high back pressure condenser vacuum regulating valve is arranged on the vacuum pipeline of the high back pressure condenser to ensure the pressure and heat exchange efficiency of the high back pressure condenser, thereby ensuring the heat exchange effect of the high back pressure condenser.

[0011] The exhaust steam inlet of the high back pressure condenser is provided with an adjustable high back pressure exhaust steam inlet valve and a measuring module for adjusting the steam inlet amount, and transmits the detection data to an external terminal. The adjustable exhaust steam inlet valve can adjust the steam inlet amount of the high back pressure condenser and the air cooling island flow rate, thereby adjusting the back pressure of the unit.

[0012] A measuring module is arranged on the pipeline connecting the high back pressure condenser and the external heat network water pipeline, which is used to measure the temperature. A temperature measuring device is arranged on the high back pressure condenser drain pipeline, and the real-time operation data is transmitted to the external terminal software module to analyze and calculate the heating amount, recovered exhaust steam amount and first-stage heating efficiency of the first-stage high back pressure condenser.

[0013] The high back pressure condenser drain pipeline is provided with a drain regulating valve for regulating the water level of the high back pressure condenser, thereby achieving regulation and control of the water level and pressure in the high back pressure condenser.

[0014] It also includes a spent steam stripping heat exchange system, wherein the spent steam stripping equipment is connected to the exhaust device of the steam turbine unit through a pipeline, and the outlet of the spent steam stripping equipment is connected to the steam side inlet of the spent steam stripping heat exchanger; the spent steam stripping system is connected in parallel with the steam side of the high back pressure condenser system and in series with the water side; the drain of the spent steam stripping heat exchanger is connected to the hot well of the exhaust device through a pipeline; and the vacuum system is connected to the inlet of the vacuum pump of the power plant through a pipeline.

[0015] The exhaust steam stripping system includes an exhaust steam stripping device, and a exhaust steam stripping device steam regulating valve for adjusting the power steam flow, a measuring module and an exhaust steam stripping device power steam inlet flow measuring device are arranged on the power steam pipe of the exhaust steam stripping device, and real-time measurement data are transmitted to an external terminal; an exhaust steam suction port of the exhaust steam stripping device is provided with an exhaust steam inlet adjustable valve and a measuring module for adjusting the steam intake, and real-time measurement data are transmitted to an external terminal. Through these measurement data, the suction efficiency of the exhaust steam stripping device is analyzed and calculated. The exhaust steam stripping device steam regulating valve can adjust the pressure and flow of the power steam, and then adjust the amount of exhaust steam sucked.

[0016] A temperature measuring device and a pressure measuring device are arranged on the water inlet and outlet pipes of the water side heat network of the exhaust steam stripping heat exchanger, and a drain temperature measuring device is arranged on the drain pipe of the upgrading heat exchanger. Through these measuring devices, real-time operation data is transmitted to an external terminal to analyze and calculate the heating amount, recovered exhaust steam amount and second-stage heating efficiency of the second-stage exhaust steam stripping heat exchanger.

[0017] The exhaust steam heat exchanger vacuum regulating valve is arranged on the vacuum pipeline of the exhaust steam stripping heat exchanger, which is used to adjust and control the heat exchange end difference of the exhaust steam stripping heat exchanger; the exhaust steam stripping heat exchanger and the external hot water network pipeline are connected with a measuring module, which is used to measure the temperature and pressure of the hot water network at the inlet and outlet of the heat exchanger, and transmit the real-time measurement data to the external terminal. The exhaust steam heat exchanger vacuum regulating valve is combined with the high back pressure condenser vacuum regulating valve to control the pressure in the quality-raising heat exchanger and the heat exchange end difference within the normal range to ensure the heat exchange efficiency.

[0018] The power steam flow measuring device and the drain flow measuring device of the exhaust steam stripping system are used to calculate the amount of recovered exhaust steam.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. According to the heat load requirements of the heating network, on the premise of meeting the water supply temperature of the heating network heater outlet, adjust the steam inlet bias of the first low-pressure cylinder, adjust the opening of the exhaust steam inlet regulating valve of the high back pressure condenser and the exhaust steam stripping system, and realize the reasonable distribution of exhaust steam between the regulating condenser and the exhaust steam stripping system, so as to maximize the recovery and utilization of exhaust steam.

[0021] 2. According to the outlet temperature of the hot network circulating water of the high back pressure condenser and the exhaust steam stripping system and the pressure inside the high back pressure condenser, calculate the heat exchange end difference of the equipment, adjust the opening of the equipment vacuum regulating valve to maintain the heat exchange end difference within the normal range and ensure the heat exchange efficiency.

[0022] 3. The heat supply and exhaust steam recovery of the high back pressure system and the exhaust steam stripping system are calculated by measuring the inlet and outlet temperatures and flow rates of the hot network water of the high back pressure system and the exhaust steam stripping system; at the same time, the coal consumption value of the unit under the back pressure is calculated to analyze the thermal economy of the exhaust steam heating system.

[0023] 4. By monitoring the water inlet temperature, return water temperature and flow rate of the heating network, the heating load is obtained, and the real-time and cumulative values ​​of heating and power supply income are calculated, and displayed in the form of charts so that the operating effect can be demonstrated through comparison.

[0024] 5. The exhaust steam recovery and quality upgrading heating system is coordinated with the DCS system to realize the operation, monitoring and control functions of the cascade heating system in the DCS control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a structural schematic diagram of an exhaust steam heating system for an air-cooling unit.

[0026] In the figure: 1- high-pressure cylinder of steam turbine, 2- medium-pressure cylinder of steam turbine, 3- low-pressure cylinder of first steam turbine, 4- low-pressure cylinder of second steam turbine, 5- high back-pressure condenser, 6- exhaust steam stripping equipment, 7- exhaust steam stripping heat exchanger, 8- heating network heater, 9- high back-pressure exhaust steam inlet adjustable valve, 10- exhaust steam inlet adjustable valve of exhaust steam stripping equipment, 11- steam inlet bias valve of low-pressure cylinder of steam turbine, 12- steam regulating valve of exhaust steam stripping equipment, 13- regulating valve of exhaust steam stripping equipment body, 14- heating network Heater extraction regulating valve, 15-high back pressure condenser vacuum regulating valve, 16-exhaust steam heat exchanger vacuum regulating valve, 17-high back pressure condenser drain regulating valve, 18-exhaust steam heat exchanger drain regulating valve, 19-thermometer, 20-pressure gauge, 21-heating network heater outlet heating network water flow measuring device, 22-exhaust steam stripping equipment power steam inlet flow measuring device, 23-exhaust steam heat exchanger drain flow measuring device, 24-heating network heater extraction steam inlet flow measuring device. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1The utility model provides a technical solution: an operation detection and evaluation system applied to the exhaust steam heating system of an air-cooled unit, comprising a steam turbine, the steam turbine having a steam turbine high-pressure cylinder 1, a steam turbine intermediate-pressure cylinder 2, a steam turbine first low-pressure cylinder 3 and a steam turbine second low-pressure cylinder 4, high-temperature and high-pressure steam performs work step by step in the steam turbine high-pressure cylinder 1, the steam turbine intermediate-pressure cylinder 2, the steam turbine first low-pressure cylinder 3 and the steam turbine second low-pressure cylinder 4, and is converted into output power, and the exhaust steam is discharged into the air-cooled island through the exhaust device. The intermediate pressure cylinder 2 of the steam turbine is connected to the heat network heater 8 through the steam supply pipeline to perform the final stage heating of the heat network circulating water; the exhaust steam of the first low pressure cylinder 3 of the steam turbine is connected in parallel with the high back pressure condenser 5 and the exhaust steam stripping heat exchanger 7 through the pipeline, and also includes the exhaust steam stripping equipment 6, the drain outlet of the exhaust steam stripping heat exchanger 7 is connected with the first low pressure cylinder 3 of the steam turbine through the pipeline, the water side inlet of the high back pressure condenser is connected with the heat network circulating water return pipeline through the pipeline, the water side inlet of the exhaust steam stripping heat exchanger 7 is connected with the high back pressure heat network water outlet pipeline, and the steam side inlet of the exhaust steam stripping heat exchanger 7 is connected with the exhaust steam stripping equipment 6 through the pipeline. The exhaust steam stripping equipment 6 has an exhaust steam stripping equipment body regulating valve 13. The hot network water is heated once in the high back pressure condenser 5 to recover the exhaust steam from the first low pressure cylinder 3. The hot network water is further heated in the exhaust steam upgrading heat exchanger 7 through the exhaust steam upgrading equipment 6 to recover the upgraded steam. Finally, the hot network heater 8 uses the extraction steam from the intermediate pressure cylinder 2 of the steam turbine to perform the final stage heating on the hot network water.

[0029] A heat network heater outlet heat network water flow measuring device 21 is installed on the water supply pipe for heat network water flowing through the outlet of the heat network heater 8, and is connected to the external software module signal, so as to facilitate the real-time transmission of the data measured by the heat network heater outlet heat network water flow measuring device 21 to the software module;

[0030] An adjustable high back-pressure exhaust steam inlet valve 9 connected to the software module signal is set at the exhaust steam inlet of the high back-pressure condenser 5, and a thermometer 19 and a pressure gauge 20 are set to transmit real-time measurement data to the software module. A thermometer 19 and a pressure gauge 20 are set on the pipeline connecting the hot network water pipeline and the high back-pressure condenser 5, which are used to measure the temperature and pressure of the high back-pressure condenser 5 and transmit the real-time measurement data to the software module.

[0031] A power steam regulating valve 12 of the spent steam stripping equipment is arranged on the power steam pipe of the spent steam stripping equipment 6, and a pressure gauge 20, a thermometer 19 and a power steam inlet flow measurement device 22 of the spent steam stripping equipment which are connected to the software module signal are arranged to transmit real-time measurement data to the software module; an adjustable valve 10, a thermometer 19 and a pressure gauge 20 for adjusting the steam inlet amount of the spent steam stripping equipment which are connected to the software module signal are arranged at the spent steam suction port of the spent steam stripping equipment 6, and real-time measurement data are connected to the software module; the adjustable valve 10 for the spent steam inlet of the spent steam stripping equipment is preferably an adjustable butterfly valve.

[0032] Furthermore, a thermometer 19 and a pressure gauge 20 are arranged at the steam side inlet of the exhaust steam stripping heat exchanger 7, a thermometer 19 is arranged at the water side inlet and outlet, and a thermometer 19 and an exhaust steam heat exchanger drain flow measuring device 23 are arranged at the drain outlet to transmit real-time measurement data to the software module; the exhaust steam heat exchanger drain flow measuring device 23 is a flow meter.

[0033] Furthermore, a high back-pressure condenser vacuum regulating valve 15 and an exhaust steam heat exchanger vacuum regulating valve 16 are respectively provided on the vacuum pipelines of the high back-pressure condenser 5 and the exhaust steam stripping heat exchanger 7 .

[0034] Furthermore, a steam extraction flow regulating valve 14 is arranged on the steam supply pipeline connecting the steam turbine intermediate pressure cylinder 2 and the heat network heater 8, and a pressure gauge 20, a thermometer 19 and a heat network heater steam extraction inlet flow measuring device 24 are arranged to transmit real-time measurement data to the software module; a thermometer 19 and a pressure gauge 20 are also arranged on the heat network water inlet and outlet pipes of the heat network heater 8, and real-time measurement data are transmitted to the software module.

[0035] By setting up thermometers, pressure gauges and flow measuring devices and transmitting data to an external software module in real time, it is convenient to monitor the entire heating system through the software module, adjust the turbine low-pressure cylinder steam inlet bias valve 11 to control the distribution of the steam inlet volume of the two low-pressure cylinders, and meet the heating system's demand for exhaust steam.

[0036] The control method of the exhaust steam heating system is to centralize all point information to the DCS (instrument control system) for processing. The software module is connected to the DCS system, and the measuring point data is read from the DCS system of the unit by MODBUS communication. The measuring point data is calculated in the module, and the calculated data is then transmitted back to the DCS system by MODBUS.

[0037] The DCS system can realize screen configuration display, prompt and alarm for the data sent back; finally, the DCS system transmits the calculation results to the SIS system (safety instrument system) through the interface machine; the SIS system can query the calculation results and realize screen display through configuration.

[0038] This connection method enables the software module to obtain all required data through the DCS, and to calculate the evaluation and guidance of the system performance, and return it to the DCS system. The guidance can be displayed in the DCS system at the same time, but it does not directly control the equipment and needs to be operated manually to ensure the safety and stability of the system. Calculate the total amount of exhaust steam recovery of the exhaust steam recovery system G=G 1 +G 2 , used to evaluate the efficiency of the exhaust steam recovery system, where G1 is the exhaust steam recovered by the high back pressure condenser (t / h), and G2 is the exhaust steam recovered by the exhaust steam stripping system (t / h).

[0039]

[0040] Among them G rw is the water flow rate of the heating network (t / h), t 1 is the outlet water temperature of high back pressure condenser (℃), t 0 is the inlet water temperature of the high back pressure condenser (℃), H p is the exhaust enthalpy of the steam turbine (kJ / kg), H gs is the high back pressure condenser drain enthalpy (kJ / kg).

[0041]

[0042] where t 2 is the outlet water temperature of the upgrading heat exchanger (℃), G dl is the power steam volume of the upgrading equipment (t / h), which is the measured value of the flow measurement device installed on the power steam pipeline of the upgrading equipment. tz is the outlet steam enthalpy of the upgrading equipment (kJ / kg), H tzs is the enthalpy of water discharge of the upgrading heat exchanger (kJ / kg).

[0043] The efficiency of the quality improvement equipment is reflected by the ratio of the amount of recovered exhaust steam to the amount of consumed power steam.

[0044]

[0045] The exhaust steam recovery heating system recovers the exhaust steam heat, which is converted into coal consumption reduction value b. This indicator is an important indicator for the benefit evaluation of the exhaust steam heating unit.

[0046]

[0047] The increase in unit coal consumption caused by increasing the unit back pressure is b gb (g / kWh), W is the unit power generation (MW), pipeline efficiency is 0.99, and boiler efficiency is estimated to be 0.93.

[0048] The enthalpy values ​​of steam and drain in the system are calculated based on the pressure and temperature values ​​of each point transmitted by the measurement module.

[0049] When the heat load demand decreases at the beginning and end of heating, the operating personnel adjust the opening of the exhaust steam distribution valves on each island of the air-cooling island according to the data fed back to the external terminal, adjust the air-cooling island fan, control the exhaust air volume of the air-cooling island, adjust the load and back pressure of the steam turbine unit, so that the heat discharged from the air-cooling island is always kept at the lowest value, keeping the unit running stably.

[0050] When the heat load demand increases in the middle of heating, the steam turbine unit load is increased, some of the air-cooling island exhaust distribution valves are closed, the steam turbine unit load and back pressure are increased, and the heat discharged from the air-cooling island is always kept at the minimum value to maximize the recovery and utilization of exhaust steam. When the heat load increases further, the opening of the steam extraction regulating valve of the heating network heater can be adjusted to increase the steam extraction volume, thereby increasing the heat supply.

[0051] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An operation monitoring and evaluation system for an exhaust steam heating system of an air-cooled unit, comprising a high back pressure condenser system, an exhaust steam stripping system and a heat network heater system, characterized in that: The heating network heater system comprises a heating network heater for performing final stage heating of the heating network circulating water, a steam extraction pipeline is provided with a heating network heater steam extraction flow regulating valve for regulating the steam inlet amount of the heating network heater, and the heating network heater is connected to an external heating network water pipeline; Set up a measurement module to measure the steam temperature and pressure of the steam supply pipeline, measure the inlet and outlet temperature and pressure of the heating network water, and transmit them to the external terminal; A heat network heater extraction steam inlet flow measurement device is arranged on the heat network heater extraction steam inlet pipeline to measure the steam flow of the steam supply pipeline and transmit it to the external terminal.

2. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooled unit according to claim 1, characterized in that: It also includes a high back-pressure condenser system, in which the steam side of the high back-pressure condenser is connected to the external steam turbine exhaust device through a pipeline; the water side of the high back-pressure condenser is connected to the heat network water pipeline through a pipeline; the high back-pressure condenser drain is connected to the hot well of the external steam turbine exhaust device through a pipeline; and the vacuum system is connected to the vacuum pump inlet of the power plant through a pipeline.

3. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooled unit according to claim 2, characterized in that: A high back-pressure condenser vacuum regulating valve is arranged on the vacuum pipeline of the high back-pressure condenser to ensure the pressure and heat exchange efficiency of the high back-pressure condenser.

4. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooled unit according to claim 2, characterized in that: The exhaust steam inlet of the high back pressure condenser is provided with an adjustable high back pressure exhaust steam inlet valve and a measuring module for adjusting the steam inlet amount, and transmitting the detection data to an external terminal.

5. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooling unit according to claim 2, characterized in that: A measuring module is provided on the pipeline connecting the high back pressure condenser and the external heat network water pipeline, which is used to measure the temperature and pressure of the high back pressure condenser and transmit the real-time measurement data to the external terminal.

6. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooled unit according to claim 2, characterized in that: The high back pressure condenser drain pipeline is provided with a drain regulating valve for regulating the water level of the high back pressure condenser.

7. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooled unit according to claim 1, characterized in that: It also includes a spent steam stripping heat exchange system, wherein the spent steam stripping equipment is connected to the exhaust device of the steam turbine unit through a pipeline, and the outlet of the spent steam stripping equipment is connected to the steam side inlet of the spent steam stripping heat exchanger; the spent steam stripping system is connected in parallel with the steam side of the high back pressure condenser system and in series with the water side; the drain of the spent steam stripping heat exchanger is connected to the hot well of the exhaust device through a pipeline; and the vacuum system is connected to the inlet of the vacuum pump of the power plant through a pipeline.

8. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooling unit according to claim 7, characterized in that: The spent steam stripping system comprises spent steam stripping equipment, wherein a spent steam stripping equipment steam regulating valve for adjusting the power steam flow, a measuring module and a spent steam stripping equipment power steam inlet flow measuring device are arranged on the power steam pipe of the spent steam stripping equipment, and real-time measurement data are transmitted to an external terminal; and a spent steam stripping equipment spent steam inlet adjustable valve and a measuring module for adjusting the steam inlet amount are arranged at the spent steam suction port of the spent steam stripping equipment, and real-time measurement data are transmitted to an external terminal.

9. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooling unit according to claim 7, characterized in that: A vacuum regulating valve of the exhaust steam heat exchanger is arranged on the vacuum pipeline of the exhaust steam stripping heat exchanger, which is used to adjust and control the heat exchange end difference of the exhaust steam stripping heat exchanger; a measuring module is arranged on the pipeline connecting the exhaust steam stripping heat exchanger and the external hot network water pipeline, which is used to measure the temperature and pressure of the hot network water at the inlet and outlet of the heat exchanger, and transmit the real-time measurement data to the external terminal.

10. The operation monitoring and evaluation system for the exhaust steam heating system of an air-cooling unit according to claim 7, characterized in that: The exhaust steam stripping system comprises a power steam flow measurement device and a drain flow measurement device, which are used to calculate the amount of recovered exhaust steam and evaluate the operating efficiency of the exhaust steam recovery system.

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