Winter operation optimization method and system for wet cooling unit

Abstract

The invention discloses a wet cooling unit winter operation optimization method and system, and relates to the technical field of wet cooling unit operation, and the method comprises the following steps: collecting and sorting unit winter operation data, and analyzing to obtain wet cooling unit winter operation characteristics; through test analysis and calculation research, obtaining equipment which has influence on the operation characteristics of the unit in winter; performing anti-freezing measure optimization on the equipment in combination with the structural design and the field condition to obtain an optimal anti-freezing measure; the optimal anti-freezing measure is applied, and the operation characteristics of the cooling tower anti-freezing measure before and after optimization application are obtained; and in combination with the thermodynamic model of the system, adjusting optimization parameters, and making a winter unit operation optimization strategy to obtain corresponding optimization operation strategies under different parameters and different environmental conditions. By optimizing and improving anti-freezing measures, the problem of freezing of the cooling tower, the circulating water pump and the equipment pipeline in a low-temperature environment can be effectively prevented, and safe and stable operation of a unit is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of the operation of wet cooling units, in particular to an optimization method and system for the winter operation of wet cooling units. Background Art

[0002] In recent years, the overall environmental temperature in northern cities of China has been variable in winter. The intermittent arrival of cold air has caused large fluctuations in the indoor environmental temperature in stages. The temperature difference between morning and evening is large. The variability of temperature makes the circulating water temperature of the wet cooling unit change frequently and fluctuate greatly during winter operation. The circulating water temperature of the unit directly affects the vacuum of the unit, the load carrying capacity, and the economy of the unit operation. In the face of the above problems, at present, during winter heating, the adjustment of the circulating water temperature and the anti-freezing of the cooling tower can only be carried out by hanging (removing) the anti-freezing board of the cooling tower. This method not only requires a large amount of labor and a lot of time, but also has a safety hazard of falling from a height for the personnel installing the anti-freezing board. In extreme weather, the installation and disassembly of the anti-freezing board cannot be carried out at all. The above situation results in the lack of flexibility and serious lag in the control of the circulating water temperature of the unit. If it affects the load carrying of the unit, the third circulating water pump will be forced to start to increase the vacuum, increasing the plant power consumption rate. In view of the above problems, it is urgent to study a technology for regulating the circulating water temperature of wet cooling units in winter. Summary of the Invention

[0003] In view of the problems existing in the existing optimization of the winter operation of wet cooling units and systems, the present invention is proposed.

[0004] Therefore, the problem to be solved by the present invention is that during winter heating at present, the adjustment of the circulating water temperature and the anti-freezing of the cooling tower can only be carried out by hanging the anti-freezing board of the cooling tower.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] In the first aspect, an embodiment of the present invention provides an optimization method for the winter operation of a wet cooling unit, which includes the following steps:

[0007] Collect and sort out the winter operation data of the wet cooling unit, and analyze it to obtain the winter operation characteristics of the wet cooling unit;

[0008] Through experimental analysis and calculation research, obtain the equipment that affects the winter operation characteristics of the unit;

[0009] Optimize the anti-freezing measures for the equipment in combination with the structural design and on-site conditions to obtain the optimal anti-freezing measures;

[0010] Apply the optimal anti-freezing measures to obtain the operation characteristics of the cooling tower anti-freezing measures before and after the optimized application;

[0011] Combined with the system thermodynamics model, adjust and optimize the parameters, formulate the optimized operation strategy for the unit in winter, and obtain the corresponding optimized operation strategies under different parameters and different environmental conditions.

[0012] As a preferred embodiment of the method for optimizing the winter operation of the wet cooling unit described in the present invention, wherein: the winter operation data of the wet cooling unit includes: ambient temperature, humidity, wind speed, inlet and outlet temperatures and flow rates of circulating water, unit load, and vacuum degree; the unit operation characteristics include: the icing characteristics of the cooling tower in winter and the variation laws of the system operation parameters.

[0013] As a preferred embodiment of the method for optimizing the winter operation of the wet cooling unit described in the present invention, wherein: the experimental analysis also includes evaluating the anti-freezing effect of the existing anti-freezing measures in winter;

[0014] The anti-freezing measures include the anti-freezing measures inside the cooling tower, the anti-freezing measures for the circulating water pump, and the anti-freezing measures for the equipment pipelines.

[0015] As a preferred embodiment of the method for optimizing the winter operation of the wet cooling unit described in the present invention, wherein: it also includes formulating a comprehensive optimized operation plan for the winter unit according to the optimized operation strategy and the operation mode of the circulating water pump;

[0016] Among them, the comprehensive optimized operation plan for the winter unit includes the unit anti-freezing plan and the optimized operation plan for the winter unit operation;

[0017] The unit anti-freezing plan includes:

[0018] According to the optimal anti-freezing measures and the actual test results, obtain the implementation results of the optimal anti-freezing measures for the unit;

[0019] The optimized operation plan for the winter unit operation includes comprehensively optimizing the operation parameters, optimizing the operation measures inside the cooling tower, and optimizing the operation of the circulating water;

[0020] The comprehensively optimized operation parameters include: optimized operation parameters in a low-temperature environment and optimized operation in a low-temperature environment; respectively adjust the optimized operation parameters in a low-temperature environment to obtain the rotational speed of the circulating water pump;

[0021] The optimized operation measures inside the cooling tower include: optimizing the anti-freezing plates inside the cooling tower;

[0022] The anti-freezing measures for the circulating water pump include: the operation measures of the winter circulating water system and the anti-freezing measures for the cooling tower;

[0023] Set the optimized parameter value of the anti-freezing measures for the cooling tower to 20%;

[0024] Before the circulating water enters the cooling tower, use the circulating pump to increase the concentration of the antifreeze to 30%;

[0025] Add an antifreeze monitoring point on-site to monitor the proportion of antifreeze. When the proportion of antifreeze is lower than 20%, increase the proportion of antifreeze until it reaches 20%, and then stop increasing.

[0026] Before the circulating water enters the cooling tower, set up a bypass through the circulating pump and install a shunt pipeline on the bypass.

[0027] If the bypass flow does not meet the antifreeze requirements of the cooling tower, adjust the bypass ratio through the circulating pump until the antifreeze requirements of the cooling tower are met.

[0028] Adjust the antifreeze measures process of the circulating water pump: Measure the operating parameters of the circulating water, adjust the circulating water flow rate and the ventilation volume of the cooling tower according to the open-loop strategy determined by the test to obtain the rotational speed of the circulating water pump and the opening degree of the bypass valve for the circulating water to enter the tower. When the unit operates in the best efficiency area in winter, and the antifreeze measures of the circulating water pump are put into operation, and the circulating water temperature is in the best operating range, implement the optimal parameter optimization strategy; if the circulating water temperature is in the first temperature range, implement the second parameter optimization strategy; if the circulating water temperature is in the second temperature range, then implement the third parameter optimization strategy; if the circulating water temperature is in the third temperature range, then implement the fourth parameter optimization strategy; if the circulating water temperature is in the fourth temperature range, then the operating personnel adjust the operating parameters according to the operating load to obtain the adjusted operating parameters of the unit.

[0029] As a preferred scheme of the winter operation optimization method for the wet-cooled unit of the present invention, wherein: the unit operating parameters include the ventilation volume of the cooling tower, the opening degree of the bypass valve for the circulating water to enter the tower, and the rotational speed of the circulating water pump.

[0030] As a preferred scheme of the winter operation optimization method for the wet-cooled unit of the present invention, wherein: the winter unit operation optimization strategy includes the unit antifreeze operation strategy and the winter unit optimization operation strategy;

[0031] Among them, the formulation of the unit antifreeze operation strategy: When the outlet temperature of the circulating water is lower than 4°C, start the antifreeze measures of the cooling tower and the circulating water system, and add antifreeze at the inlet of the circulating water.

[0032] The setting of the circulating water system includes: installing an antifreeze circulating pump at the bottom of the equipment and installing a shunt pipeline in the circulating water pipeline;

[0033] Use the circulating pump to control the proportion of antifreeze according to the antifreeze concentration.

[0034] Set an antifreeze concentration monitoring point at the inlet of the circulating water in the circulating pipeline. If the proportion of antifreeze is lower than the set value, it is necessary to start the circulating pump to increase the proportion of antifreeze;

[0035] The winter unit optimization operation strategy includes:

[0036] In winter, the exhaust steam flow of the low-pressure cylinder decreases, the circulating flow decreases, the ventilation volume of the cooling tower is increased or full-circumference throttling is adopted;

[0037] Prevent the cooling tower and equipment pipelines from freezing through anti-freezing measures;

[0038] Adjust the rotational speed of the circulating water pump and the opening degree of the bypass valve for the circulating water to enter the tower to obtain the optimized parameter results. According to the optimized parameter results, obtain the corresponding operating mode of the circulating water pump:

[0039] If the circulating water flow increases and the ventilation volume of the cooling tower increases, the rotational speed of the circulating water pump increases;

[0040] If the circulating water flow decreases and the ventilation volume of the cooling tower decreases, the rotational speed of the circulating water pump maintains the existing level.

[0041] As a preferred scheme of the winter operation optimization method for the wet-cooled unit described in the present invention, among them: after obtaining the optimized operation strategy, evaluate the optimized operation strategy. The specific steps include:

[0042] The operating characteristics of the cooling tower anti-freezing measures before and after optimization application, and the changes in the unit thermodynamics before and after optimization;

[0043] Circulating water temperature stability: The index of temperature stability adopts the temperature difference index, and the temperature difference index is the difference between the outlet water temperature and the return water temperature of the circulating water;

[0044] Winter unit performance: Combine the operating characteristics of the cooling tower anti-freezing measures before and after optimization application and the changes in the unit thermodynamics before and after optimization to obtain the evaluation results and the optimal anti-freezing measures;

[0045] Optimal anti-freezing measures for unit operation: According to the optimal anti-freezing measures and the actual test results, obtain the implementation results of the optimal anti-freezing measures for the unit, and determine the application of the optimal anti-freezing measures and the corresponding operating mode of the circulating water pump;

[0046] Combine the optimal anti-freezing measures and the operating mode of the circulating water pump to form a comprehensive optimized operation scheme for the unit, and implement it at the cold end of the unit in winter to obtain the winter unit performance indicators and evaluate the results;

[0047] The evaluation results include: The unit operates in the best efficiency region in winter, and the change results of the circulating water temperature before and after optimization.

[0048] In the second aspect, the embodiment of the present invention provides a winter operation optimization system for a wet-cooled unit, which includes a data collection and analysis module, an influencing factor analysis module, an evaluation module, and a scheme formulation module;

[0049] The data collection and analysis module is used to collect and sort out the winter operation data of the unit, analyze the data, and obtain the winter operation characteristics of the wet-cooled unit;

[0050] The influencing factor analysis module obtains the equipment that affects the operating characteristics of the unit in winter through experimental analysis and calculation research.

[0051] The evaluation module is used to evaluate the anti-freezing effect of existing anti-freezing measures in winter.

[0052] The solution formulation module formulates a comprehensive optimized operation plan for the unit in winter.

[0053] In a third aspect, an embodiment of the present invention provides a computer device, including a memory and a processor. The memory stores a computer program, wherein: when the processor executes the computer program, any step of the above-mentioned winter operation optimization method for a wet-cooled unit is implemented.

[0054] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, wherein: when the computer program is executed by a processor, any step of the above-mentioned winter operation optimization method for a wet-cooled unit is implemented.

[0055] The beneficial effects of the present invention are as follows: By optimizing and improving the anti-freezing measures, the icing problems of cooling towers, circulating water pumps, and equipment pipelines in low-temperature environments can be effectively prevented, thus ensuring the safe and stable operation of the unit. And corresponding parameter optimization strategies are formulated according to different environmental temperature ranges to ensure that the unit can maintain the best efficiency operation under different working conditions, improve the energy utilization efficiency, reduce the operation cost, the optimized anti-freezing measures reduce the risk of equipment damage caused by low temperature, protect the internal components of the unit from low-temperature damage, and help extend the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for description in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0057] Figure 1 It is a flowchart of the winter operation optimization method for a wet-cooled unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0058] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the drawings of the specification. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be practiced in other ways than those specifically described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0060] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The appearances of "in one embodiment" in different places in this specification do not all refer to the same embodiment, nor are they separate or alternative embodiments that exclude each other with other embodiments.

[0061] The present invention is described in detail in conjunction with schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions of length, width, and depth should be included.

[0062] At the same time, in the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper, lower, inner, and outer" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first, second, or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0063] Unless otherwise clearly defined and limited in the present invention, the terms "mounted, connected, and coupled" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can also be mechanically connected, electrically connected, or directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] Embodiment 1

[0065] Referring to Figure 1 , which is the first embodiment of the present invention. This embodiment provides an optimization method for the winter operation of a wet cooling unit, including the following steps:

[0066] S1. Collect and collate the winter operation data of the wet cooling unit, analyze it, and obtain the winter operation characteristics of the wet cooling unit.

[0067] The winter operation data of the wet and cold unit include: ambient temperature, humidity, wind speed, inlet and outlet temperatures and flow rate of circulating water, unit load, and vacuum degree; the unit operation characteristics include: the ice formation characteristics of the cooling tower in winter and the variation law of system operation parameters.

[0068] S2. Through experimental analysis and calculation research, obtain the equipment that has an impact on the winter operation characteristics of the unit.

[0069] The experimental analysis also includes evaluating the anti-freezing effect of existing anti-freezing measures in winter;

[0070] The anti-freezing measures include anti-freezing measures inside the cooling tower, anti-freezing measures for circulating water pumps, and anti-freezing measures for equipment pipelines.

[0071] S3. Optimize the anti-freezing measures for the equipment in combination with the structural design and on-site conditions to obtain the optimal anti-freezing measures.

[0072] Analyze the effectiveness and limitations of the current anti-freezing measures and identify potential risk points.

[0073] Collect environmental data including the lowest temperature, humidity, wind speed, etc. to understand the behavior of the system under extreme weather conditions.

[0074] Review the physical layout and material selection of the equipment to ensure that they can withstand low-temperature conditions. Use software to simulate the heat transfer under different anti-freezing strategies, predict possible ice formation areas, evaluate the costs, implementation difficulties, and long-term maintenance requirements of various anti-freezing solutions. Based on the above analysis, propose new anti-freezing measures or adjust the existing anti-freezing strategies, discuss with industry experts to obtain professional advice to ensure the rationality and feasibility of the plan, and prepare detailed construction drawings and technical specifications for the next step of application.

[0075] S4. Apply the optimal anti-freezing measures to obtain the operation characteristics of the cooling tower anti-freezing measures before and after optimized application.

[0076] Install the improved anti-freezing device on the selected test unit, start the system and monitor its performance, and record key parameters such as temperature, pressure, flow rate, etc.

[0077] Comparative analysis: Compare the performance differences of the system before and after optimization, especially the changes in anti-freezing effect and energy consumption.

[0078] Set up an automatic data acquisition system to continuously track the operation status of the equipment, adjust the anti-freezing measures in a timely manner according to the problems in actual operation to ensure the best performance. If the test is successful, gradually promote it to other units or the entire cooling tower group, summarize the experimental results, form a written report for internal learning and future project reference, and conduct operation training on the new anti-freezing measures for operators to ensure that they are familiar with the updated process.

[0079] S5. Combine with the system thermodynamics model, adjust and optimize the parameters, formulate the optimized operation strategy for the unit in winter, and obtain the corresponding optimized operation strategies under different parameters and different environmental conditions.

[0080] The optimized operation strategy for the unit in winter includes the anti-freezing operation strategy for the unit and the optimized operation strategy for the unit in winter.

[0081] Among them, the formulation of the anti-freezing operation strategy for the unit: when the outlet temperature of the circulating water is lower than 4°C, start the anti-freezing measures for the cooling tower and the circulating water system, and add antifreeze at the inlet of the circulating water.

[0082] The setting of the circulating water system includes: installing an antifreeze circulating pump at the bottom of the equipment and a shunt pipeline in the circulating water pipeline.

[0083] Use the circulating pump to control the proportion of antifreeze according to the concentration of antifreeze.

[0084] Set an antifreeze concentration monitoring point at the inlet of the circulating water in the circulating pipeline. If the proportion of antifreeze is lower than the set value, the circulating pump needs to be started to increase the proportion of antifreeze.

[0085] The optimized operation strategy for the unit in winter includes:

[0086] In winter, the exhaust steam flow of the low-pressure cylinder decreases, the circulating flow decreases, increase the ventilation volume of the cooling tower or adopt full-circumference throttling.

[0087] Prevent the cooling tower and the equipment pipeline from freezing through anti-freezing measures.

[0088] Adjust the speed of the circulating water pump and the opening of the bypass valve for the circulating water to enter the tower, obtain the parameter optimization result, and according to the parameter optimization result, obtain the corresponding operation mode of the circulating water pump:

[0089] If the circulating water flow increases and the ventilation volume of the cooling tower increases, the speed of the circulating water pump increases.

[0090] If the circulating water flow decreases and the ventilation volume of the cooling tower decreases, the speed of the circulating water pump maintains the existing level.

[0091] After obtaining the optimized operation strategy, evaluate the optimized operation strategy. The specific steps include:

[0092] The operation characteristics of the cooling tower anti-freezing measures before and after optimization application, and the changes in the unit thermodynamics before and after optimization.

[0093] The stability of the circulating water temperature: The index of temperature stability uses the temperature difference index, and the temperature difference index is the difference between the outlet temperature and the return water temperature of the circulating water.

[0094] Winter unit performance: By combining the anti-freezing measures of the cooling tower with the operating characteristics before and after optimization, and the changes in the unit's thermodynamics before and after optimization, the evaluation results are obtained, and the optimal anti-freezing measures are obtained;

[0095] Optimal anti-freezing measures for unit operation: Based on the optimal anti-freezing measures and the actual test results, the implementation results of the optimal anti-freezing measures for the unit are obtained, and the application of the optimal anti-freezing measures and the corresponding operating mode of the circulating water pump are determined;

[0096] Combine the optimal anti-freezing measures and the operating mode of the circulating water pump to form a comprehensive optimized operating plan for the unit in winter, and implement it at the cold end of the unit in winter to obtain the performance indicators of the unit in winter and evaluate the results;

[0097] The evaluation results include: The unit operates in the best efficiency area in winter, and the change results of the circulating water temperature before and after optimization.

[0098] S6. Develop a comprehensive optimized operating plan for the unit in winter according to the optimized operating strategy and the operating mode of the circulating water pump.

[0099] The comprehensive optimized operating plan for the unit in winter includes the unit anti-freezing plan and the optimized operating plan for the unit in winter;

[0100] The unit anti-freezing plan includes:

[0101] Based on the optimal anti-freezing measures and the actual test results, the implementation results of the optimal anti-freezing measures for the unit are obtained;

[0102] The optimized operating plan for the unit in winter includes comprehensively optimized operating parameters, optimized operating measures in the cooling tower, and optimized operation of the circulating water;

[0103] The comprehensively optimized operating parameters include: Optimized operating parameters in low-temperature environments and optimized operation in low-temperature environments; respectively adjust the circulating water pump speed under the optimized operating parameters in low-temperature environments;

[0104] The optimized operating measures in the cooling tower include: Optimization of the anti-freezing board in the cooling tower;

[0105] The anti-freezing measures for the circulating water pump include: Operating measures for the winter circulating water system and anti-freezing measures for the cooling tower;

[0106] Set the optimized parameter value of the anti-freezing measures for the cooling tower to 20%;

[0107] Before the circulating water enters the cooling tower, use the circulating pump to increase the concentration of the antifreeze to 30%;

[0108] Add an antifreeze monitoring point on site to monitor the proportion of the antifreeze. When the proportion of the antifreeze is lower than 20%, increase the proportion of the antifreeze until it reaches 20%, and then stop increasing;

[0109] Before the circulating water enters the cooling tower, a bypass is set through the circulating pump, and a shunt pipeline is set on the bypass.

[0110] If the bypass flow does not meet the anti-freezing requirements of the cooling tower, adjust the bypass ratio through the circulating pump until the anti-freezing requirements of the cooling tower are met.

[0111] Adjust the anti-freezing measures process of the circulating water pump: measure the operating parameters of the circulating water, adjust the circulating water flow rate and the ventilation volume of the cooling tower according to the open-loop strategy determined by the test to obtain the rotational speed of the circulating water pump and the opening degree of the bypass valve for the circulating water to enter the tower; when the unit operates in the best efficiency area in winter, and the anti-freezing measures of the circulating water pump are put into operation, and the circulating water temperature is in the best operating range, implement the optimal parameter optimization strategy; if the circulating water temperature is in the first temperature range, implement the second parameter optimization strategy; if the circulating water temperature is in the second temperature range, then implement the third parameter optimization strategy; if the circulating water temperature is in the third temperature range, then implement the fourth parameter optimization strategy; if the circulating water temperature is in the fourth temperature range, then the operating personnel adjust the operating parameters according to the operating load to obtain the adjusted operating parameters of the unit.

[0112] The operating parameters of the unit include the ventilation volume of the cooling tower, the opening degree of the bypass valve for the circulating water to enter the tower, and the rotational speed of the circulating water pump.

[0113] The first temperature range is 4°C - 7°C; the second temperature range is 7°C - 14°C; the third temperature range is 14°C - 18°C; the fourth temperature range is 18°C - 22°C; the first parameter optimization strategy, the second parameter optimization strategy, the third parameter optimization strategy, the fourth parameter optimization strategy, the first parameter optimization strategy and the second parameter optimization strategy are all the optimization results in step S6.

[0114] The first parameter optimization strategy: Keep the control parameters of the circulating water flow rate, the outlet water temperature of the cooling tower, and the ventilation volume of the cooling tower in the summer peak shaving operation state.

[0115] The second parameter optimization strategy: For the control parameters of the circulating water flow rate, the outlet water temperature of the cooling tower, and the ventilation volume of the cooling tower, if the circulating water flow rate changes, perform frequency modulation, and the rotational speed of the circulating water pump changes accordingly.

[0116] The third parameter optimization strategy: Adjust the set value of the outlet water temperature of the cooling tower, adjust the rotational speed of the circulating water pump, adjust the ventilation volume of the cooling tower, and for the control parameters of the circulating water flow rate, the outlet water temperature of the cooling tower, and the ventilation volume of the cooling tower, if the circulating water flow rate changes, perform frequency modulation, and the rotational speed of the circulating water pump changes accordingly.

[0117] The fourth parameter optimization strategy: All the anti-freezing plates in the cooling tower are hung, and the circulating water flow rate, the outlet water temperature of the cooling tower, and the ventilation volume of the cooling tower remain unchanged.

[0118] The adjusted unit operating parameters include: the rotational speed of the circulating water pump, the outlet water temperature of the cooling tower, and the ventilation volume of the cooling tower.

[0119] In summary, by optimizing and improving the anti-freezing measures, the icing problems of the cooling tower, circulating water pump, and equipment pipelines in low-temperature environments can be effectively prevented, thus ensuring the safe and stable operation of the unit. Corresponding parameter optimization strategies are formulated according to different environmental temperature ranges to ensure that the unit can operate at the best efficiency under different working conditions, improving energy utilization efficiency, reducing operating costs, reducing the risk of equipment damage caused by low temperature, protecting the internal components of the unit from low-temperature damage, and helping to extend the service life of the equipment.

[0120] Embodiment 2

[0121] On the basis of the first embodiment, this embodiment further provides an optimization system for the winter operation of a wet cooling unit, including a data collection and analysis module, an influencing factor analysis module, an evaluation module, and a solution formulation module;

[0122] The data collection and analysis module is used to collect and organize the winter operation data of the unit, analyze the data, and obtain the winter operation characteristics of the wet cooling unit;

[0123] The influencing factor analysis module obtains the equipment that affects the winter operation characteristics of the unit through experimental analysis and calculation research;

[0124] The evaluation module is used to evaluate the anti-freezing effect of the existing anti-freezing measures in winter;

[0125] The solution formulation module formulates a comprehensive optimized operation plan for the winter unit.

[0126] This embodiment also provides a computer device applicable to the situation of the optimization method for the winter operation of a wet cooling unit, including a memory and a processor; the memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to implement the optimization method for the winter operation of the wet cooling unit as proposed in the above embodiment.

[0127] The computer device may be a terminal, which includes a processor, a memory, a communication interface, a display screen, and an input device connected via a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be achieved through WIFI, a carrier network, NFC (Near Field Communication), or other technologies. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0128] This embodiment also provides a storage medium, on which a computer program is stored, and when the program is executed by a processor, it implements the method for optimizing the winter operation of a wet-cooling unit as proposed in the above embodiment.

[0129] The storage medium proposed in this embodiment and the data storage method proposed in the above embodiment belong to the same inventive concept. Technical details not described in detail in this embodiment can be referred to in the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0130] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A method for optimizing winter operation of a wet cooling unit, characterized in that: The following steps are included: Collect and organize the winter operation data of the wet cooling unit, analyze it, and obtain the winter operation characteristics of the wet cooling unit; Through experimental analysis and computational research, the equipment that affects the operating characteristics of the unit in winter is obtained; Optimize the antifreeze measures for the equipment in combination with the structural design and site conditions to obtain the best antifreeze measures; Apply the optimal antifreeze measures to obtain the operating characteristics of the cooling tower antifreeze measures before and after the optimized application; Combined with the system thermodynamic model, the optimization parameters are adjusted, and the winter unit operation optimization strategy is formulated to obtain the corresponding optimal operation strategy under different parameters and different environmental conditions.

2. The winter operation optimization method of a wet cooling unit according to claim 1, characterized in that: The winter operation data of the wet cooling unit include: ambient temperature, humidity, wind speed, circulating water inlet and outlet temperature, flow rate, unit load, and vacuum degree; the unit operation characteristics include: winter freezing characteristics of the cooling tower and the changing rules of system operation parameters.

3. The winter operation optimization method of a wet cooling unit according to claim 2, characterized in that: The test analysis also includes an evaluation of the effectiveness of existing antifreeze measures in preventing freezing during winter; Anti-freeze measures include anti-freeze measures inside cooling towers, anti-freeze measures for circulating water pumps, and anti-freeze measures for equipment pipelines.

4. The winter operation optimization method of a wet cooling unit according to claim 3, characterized in that: It also includes formulating a comprehensive optimized operation plan for the unit in winter based on the optimized operation strategy and the operation mode of the circulating water pump; Among them, the winter unit comprehensive optimization operation plan includes the unit antifreeze plan and the winter unit operation optimization plan; The unit antifreeze solution includes: According to the optimal antifreeze measures and actual test results, the implementation results of the optimal antifreeze measures for the unit are obtained; The winter unit operation optimization plan includes comprehensive optimization of operating parameters, optimization of cooling tower operation measures, and optimization of circulating water operation; The comprehensive optimization operation parameters include: low temperature environment optimization operation parameters and low temperature environment optimization operation; respectively adjusting the low temperature environment optimization operation parameters to obtain the circulating water pump speed; The optimized operation measures in the cooling tower include: optimization of antifreeze plates in the cooling tower; The circulating water pump antifreeze measures include: winter circulating water system operation measures and cooling tower antifreeze measures; The optimized parameter setting value for cooling tower antifreeze measures is 20%; Before the circulating water enters the cooling tower, the concentration of antifreeze is increased to 30% using a circulating pump; Add antifreeze monitoring points on site to monitor the antifreeze ratio. When the antifreeze ratio is lower than 20%, increase the antifreeze ratio until it reaches 20%, then stop increasing. Before the circulating water enters the cooling tower, a bypass is set through the circulating pump, and a diversion pipeline is set on the bypass; If the bypass flow does not meet the antifreeze requirements of the cooling tower, adjust the bypass ratio through the circulating pump until the antifreeze requirements of the cooling tower are met; Process for adjusting the antifreeze measures for the circulating water pump: measure the circulating water operating parameters, adjust the flow of the circulating water pump and the ventilation volume of the cooling tower according to the open-loop strategy determined by the test, and obtain the circulating water pump speed and the opening of the bypass door on the circulating water pump tower; when the unit operates in the optimal efficiency area in winter, and the antifreeze measures for the circulating water pump are put into operation, and the circulating water temperature is in the optimal operating range, implement the optimal parameter optimization strategy; if the circulating water temperature is in the first temperature range, implement the second parameter optimization strategy; if the circulating water temperature is in the second temperature range, implement the third parameter optimization strategy; if the circulating water temperature is in the third temperature range, implement the fourth parameter optimization strategy; if the circulating water temperature is in the fourth temperature range, the operating personnel adjust the operating parameters according to the operating load to obtain the adjusted unit operating parameters.

5. The winter operation optimization method of a wet cooling unit according to claim 4, characterized in that: The unit operating parameters include the cooling tower ventilation volume, the circulating water tower bypass door opening, and the circulating water pump speed.

6. The winter operation optimization method of a wet cooling unit according to claim 5, characterized in that: The winter unit operation optimization strategy includes a unit antifreeze operation strategy and a winter unit optimization operation strategy; Among them, the formulation of the antifreeze operation strategy of the unit: when the circulating water outlet temperature is lower than 4°C, the cooling tower antifreeze measures and the circulating water system are started, and antifreeze is added at the circulating water inlet; The circulating water system configuration includes: an antifreeze circulating pump is arranged at the bottom of the equipment, and a diversion pipeline is arranged in the circulating water circulation pipeline; Use a circulating pump to control the antifreeze ratio according to the antifreeze concentration; An antifreeze concentration monitoring point is set at the circulating water inlet in the circulation pipeline. If the antifreeze ratio is lower than the set value, the circulation pump needs to be turned on to increase the antifreeze ratio; The winter unit optimization operation strategy includes: In winter, the exhaust flow of low-pressure cylinders is reduced, the circulation flow is reduced, and the ventilation volume of the cooling tower is increased or full-circle throttling is adopted; Prevent cooling towers from freezing and equipment pipes from freezing through antifreeze measures; Adjust the speed of the circulating water pump and the opening of the bypass door of the circulating water upper tower to obtain the parameter optimization results. According to the parameter optimization results, the corresponding circulating water pump operation mode is obtained: If the circulating water flow rate increases and the cooling tower ventilation volume increases, the circulating water pump speed will increase; If the circulating water flow rate decreases and the cooling tower ventilation volume decreases, the circulating water pump speed will remain at the current level.

7. The winter operation optimization method of a wet cooling unit according to claim 6, characterized in that: After obtaining the optimized operation strategy, the optimized operation strategy is evaluated. The specific steps include: The operating characteristics of the cooling tower antifreeze measures before and after the optimization application, and the changes in the unit thermal performance before and after the optimization; Circulating water temperature stability: The temperature stability index adopts the temperature difference index, which is the difference between the circulating water outlet temperature and the return water temperature; Winter unit performance: Combined with the operating characteristics of the cooling tower antifreeze measures before and after the optimization application, the changes in the unit's thermal performance before and after the optimization, the evaluation results are obtained to obtain the optimal antifreeze measures; Optimal antifreeze measures for unit operation: Based on the optimal antifreeze measures and actual test results, the implementation results of the optimal antifreeze measures for the unit are obtained, and the application of the optimal antifreeze measures and the corresponding operating mode of the circulating water pump are determined; Combine the best antifreeze measures and the circulating water pump operation mode to form a comprehensive optimized operation plan for the unit, and implement it at the cold end of the unit in winter to obtain the winter unit performance indicators and evaluate the results; The evaluation results include: the unit operates in the optimal efficiency area in winter, and the changes in circulating water temperature before and after optimization.

8. A wet cooling unit winter operation optimization system, based on the wet cooling unit winter operation optimization method according to any one of claims 1 to 7, characterized in that: It includes data collection and analysis module, influencing factor analysis module, evaluation module, and program formulation module; The data collection and analysis module is used to collect and organize the winter operation data of the unit, analyze the data, and obtain the winter operation characteristics of the wet cooling unit; The influencing factor analysis module obtains the equipment that affects the winter unit operation characteristics through experimental analysis and calculation research; The evaluation module is used to evaluate the antifreeze effect of existing antifreeze measures in winter; The program formulation module formulates a comprehensive optimization operation plan for the units in winter.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for optimizing winter operation of a wet cooling unit according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for optimizing winter operation of a wet cooling unit according to any one of claims 1 to 7 are implemented.

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