An esterification steam turbine device, system and steam turbine control method

Abstract

This application relates to the field of power station steam turbine equipment, and specifically relates to an esterification steam turbine device, system and steam turbine control method; it includes a steam turbine, a heat exchanger connected to the steam turbine, and a steam generation device; the steam turbine includes an intake pipeline, and the intake pipeline is connected to the heat exchanger and the steam generation device through a heat exchange pipeline and a first steam pipeline respectively; the heat exchanger is connected to the steam generation device through a second steam pipeline; a first steam control valve and a second steam control valve are respectively arranged on the first steam pipeline and the second steam pipeline, including a first steam control valve body, a second steam control valve body, and a first control component and a second control component arranged on the first steam control valve body and the second steam control valve body; in the technical solution provided by the embodiments of this application, by configuring a temperature control device and configuring a temperature control model in the temperature control device, the temperature control process is made more accurate and the obtained target temperature is more precise.

Description

Technical Field

[0001] This application relates to the field of steam turbine equipment in power stations, and particularly to an esterification steam turbine device, system and steam turbine control method. Background Art

[0002] A steam turbine is a turbomachine, also known as a steam turbine. A steam turbine is an external combustion rotary machine that can convert steam thermal energy into mechanical work. During the working process, after the steam from the boiler enters the steam turbine, it only needs to pass through a series of annularly arranged nozzles and moving blades in sequence, and then the thermal energy of the steam can be converted into the mechanical energy of the rotation of the steam turbine rotor, thus realizing the effective conversion of energy. The steam turbine is one of the main equipment of the steam power plant. The steam turbine is mainly used as the prime mover for power generation, and can also directly drive various pumps, fans, compressors and ship propellers, etc. It can also use the exhaust steam or intermediate extraction steam of the steam turbine to meet the heating needs in production and life. Since the steam flow in the steam turbine is continuous and high-speed, and the flow rate that can pass through per unit area is large, it can generate a relatively large power and has a relatively high thermal efficiency. Therefore, the steam turbine is widely used in modern society.

[0003] However, in the actual use process, because the steam has a relatively high temperature, and because most of the blades in the steam turbine are made of metal materials, the metal damage to the blades under high temperature is also a relatively important problem in the current use and maintenance of steam turbines. And for the current steam turbine system, there is no control for high-temperature steam, resulting in a large loss of the service life of the blades of the steam turbine. Summary of the Invention

[0004] In order to solve the above technical problems, this application provides an esterification steam turbine device, system and steam turbine control method, which realizes the temperature control of high-pressure steam during the working process of the steam turbine by configuring temperature control-related devices and mechanical components on the steam turbine, and reduces the material damage to the blades of the steam turbine caused by over-high or too-low temperature.

[0005] In order to achieve the above object, the technical solutions adopted in the embodiments of this application are as follows:

[0006] In a first aspect, an esterification steam turbine device includes a steam turbine, a heat exchanger connected to the steam turbine, and a steam generating device; the steam turbine includes an intake pipeline, and the intake pipeline is connected to the heat exchanger and the steam generating device through a heat exchange pipeline and a first steam pipeline respectively; the heat exchanger is connected to the steam generating device through a second steam pipeline; a first steam control valve and a second steam control valve are respectively arranged on the first steam pipeline and the second steam pipeline, and the first steam control valve and the second steam control valve are intelligent control valves, each including a first steam control valve body, a second steam control valve body, and a first control component and a second control component arranged on the first steam control valve body and the second steam control valve body.

[0007] In a first possible implementation manner of the first aspect, the heat exchanger includes a heat exchange space surrounded by multiple sets of plates, and a heat exchange inlet and a heat exchange outlet are respectively arranged on the corresponding plates of the multiple sets of plates; the corresponding plates can move relatively selectively, so that the area of the heat exchange space changes with the movement of the plates.

[0008] Combined with the first possible implementation manner of the first aspect, in a second possible implementation manner, a plurality of heat exchange plates corresponding to the heat exchange inlet and the heat exchange outlet are arranged in the heat exchange space, and the steam entering the heat exchange inlet flows out through the plurality of heat exchange plates through the heat exchange outlet.

[0009] Combined with the second possible implementation manner of the first aspect, in a third possible implementation manner, the heat exchange inlet is connected to the outlet of the steam generating device through the second steam pipeline, and the heat exchange outlet is connected to the steam turbine through the heat exchange pipeline.

[0010] In a second aspect, a steam turbine system includes the steam turbine device described in any one of the above, and further includes a control subsystem, and the control subsystem communicates with the first control component and the second control component in the steam turbine device; the control subsystem further includes a data acquisition device and a temperature control device, the data acquisition device is arranged at the steam outlet of the steam generating device and is used for acquiring the real-time temperature of the steam outlet of the steam generating device; the temperature control device is electrically connected to the data acquisition device, the first control component and the second control component, and a temperature control model is configured in the temperature control device, and the temperature control model controls the opening and closing of the first steam control valve and the second steam control valve by the first control component and the second control component based on the real-time data acquired by the data acquisition device.

[0011] In the first possible implementation of the second aspect, the temperature control model includes a first temperature control model and a second temperature control model. A temperature control strategy is configured in the first temperature control model, and the temperature control strategy is used to control the opening and closing of the first steam control valve and the second steam control valve by the first control component and the second control component; the second temperature control model is used to control the relative movement of the group of plates to realize the change of the heat exchange space volume.

[0012] In a third aspect, a steam turbine system control method is used to control the steam turbine system of any one of the above, and includes the following steps: obtaining real-time data of steam based on the data acquisition device, and comparing the real-time data with target data to obtain a data difference; determining a first temperature control strategy based on the data difference; controlling the opening and closing of the first steam control valve and the second steam control valve corresponding to the first control component and the second control component based on the first temperature control strategy; when controlling the second steam control valve to be in an open state and the first steam control valve to be in a closed state, controlling the relative movement of the group of plates based on the second control strategy to realize the change of the heat exchange space volume to a target heat exchange space volume.

[0013] In the first possible implementation of the third aspect, determining a first temperature control strategy based on the data difference includes: when the data difference is a positive difference, the first temperature control strategy is to control the first steam control valve to close and the second steam control valve to open; when the data difference is a negative difference, the first temperature control strategy is to control the first steam control valve to open and the second steam control valve to close.

[0014] Combined with the first possible implementation of the third aspect, in the second possible implementation, when controlling the second steam control valve to be in an open state and the first steam control valve to be in a closed state, controlling the relative movement of the group of plates based on the second control strategy to realize the change of the heat exchange space volume to a target heat exchange space volume includes: establishing a heat exchange area - temperature change curve; obtaining an initial heat exchange volume; determining a target heat exchange volume based on the data difference and the heat exchange area - temperature change curve; controlling the component to move to a target position based on the target heat exchange area and the initial heat exchange area, specifically including: obtaining the initial coordinate points of the component to be moved and the corresponding component; determining an initial distance based on the initial coordinate points; determining a target distance based on the target heat exchange volume; controlling the component to move to the target coordinate point based on the target distance.

[0015] Combined with the first possible implementation manner of the third aspect, in the third possible implementation manner, the target temperature includes first target data and second target data. When the data difference is less than the second target temperature, the first steam control valve and the second steam control valve are closed, and the steam in the steam generating device is heated until the real-time data is greater than the second target data and less than the first target data.

[0016] In the technical solution provided by the embodiments of the present application, a control device is configured in the existing esterification steam turbine, realizing the regulation of the steam entering the steam turbine, so that the temperature of the steam entering the steam turbine reaches the optimal result. It reduces the damage to the metal blades and other metal components in the steam turbine when the steam temperature is too high. And because the steam turbine and the system supporting the steam turbine provided by the present invention can be directly assembled on the existing steam turbine unit, it also reduces the cost of re-modifying the power generation system. And in the technical solution provided by the embodiments of the present application, by configuring a temperature control device and a temperature control model in the temperature control device, the temperature control process is made more accurate and the obtained target temperature is more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0018] The methods, systems, and / or programs in the drawings will be further described according to exemplary embodiments. These exemplary embodiments will be described in detail with reference to the drawings. These exemplary embodiments are non-limiting exemplary embodiments, where the example numbers represent similar mechanisms in the various views of the drawings.

[0019] Figure 1 It is a schematic structural diagram of an esterification steam turbine device provided by an embodiment of the present invention.

[0020] Figure 2 It is a structural block diagram of an esterification steam turbine system provided by an embodiment of the present invention.

[0021] Figure 3 It is a schematic structural diagram of a heat exchanger provided by an embodiment of the present invention.

[0022] Figure 4 It is a schematic flow diagram of a control method for an esterification steam turbine system provided by the present invention.

[0023] ICON:

[0024] 100 - Steam turbine system;

[0025] 110 - Steam turbine unit; 120 - Control subsystem;

[0026] 111 - Steam turbine; 112 - Steam generation device; 113 - Heat exchanger; 114 - First steam pipeline; 115 - Second steam pipeline; 116 - First steam control valve; 117 - Second steam control valve;

[0027] 121 - Data acquisition device; 122 - Temperature control device;

[0028] 1131 - Heat exchange inlet; 1132 - Heat exchange outlet; 1133 - Group plate; 1134 - Heat exchange plate. Detailed implementation mode

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It 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 cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. 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 situations.

[0033] In the following detailed description, many specific details are elaborated by way of example in order to provide a comprehensive understanding of the relevant guidance. However, for those skilled in the art, it is obvious that the present application can be implemented without these details. In other cases, well-known methods, procedures, systems, components, and / or circuits have been described at a relatively high level without details in order to avoid unnecessarily obscuring aspects of the present application.

[0034] In this application, flowcharts are used to illustrate the execution processes performed by the systems according to the embodiments of this application. It should be clearly understood that the execution processes of the flowcharts may not be executed in sequence. On the contrary, these execution processes can be executed in the reverse order or simultaneously. Additionally, at least one other execution process can be added to the flowchart. One or more execution processes can be deleted from the flowchart.

[0035] Please refer to Figure 2 , Figure 2 , which is the structural block diagram of the esterification steam turbine system provided for this embodiment, and is used to show the overall architecture of this system.

[0036] In this embodiment, an esterification steam turbine system includes an esterification steam turbine device, and also includes a control subsystem that communicates with the turbine device. Among them, the turbine device is the main working device, which is used to obtain steam and input the steam into the turbine through a pipeline. The working principle and process of the turbine are similar to those of existing turbines, and will not be described in detail in this embodiment.

[0037] However, it should be noted that in this embodiment, the main steam carrier is esterification steam, that is, this embodiment can achieve the acquisition of steam used by the turbine by configuring the recycling of esterification steam.

[0038] In this embodiment, the control subsystem includes a data acquisition device and a temperature control device. The data acquisition device is used to collect the real-time temperature data at the steam outlet, and the temperature control device makes a judgment based on the real-time temperature data and the target data and performs specific execution processing based on the judgment result.

[0039] In a possible embodiment, this system realizes the control of the steam temperature used in the steam turbine through the combination of software and hardware, enabling the overall operation of the steam turbine to achieve the optimal effect, where the optimal effect refers to minimizing the damage to the main metal components of the steam turbine when the steam turbine is operating normally. Since the components configured inside the steam turbine are metal components, and the steam turbine mainly generates electricity through steam, but steam can cause metal fatigue of the metal components, reducing the service life of the steam turbine. Therefore, for the maintenance and use of the key components in the steam turbine, it is necessary to control the temperature of the steam to increase the service life of the metal components in the steam turbine, mainly the steam turbine blades, while meeting the requirements of the steam turbine operation.

[0040] Refer to Figure 1 , Figure 1 which is a schematic diagram of the esterification steam turbine device provided in this embodiment. The control subsystem in the steam turbine system mainly controls the steam turbine device.

[0041] In this embodiment, the steam turbine device includes a steam turbine, a heat exchanger connected to the steam turbine, and a steam generating device. The steam generating device is the main steam source, providing the required steam for the steam turbine. The steam turbine is the main working component, and the heat exchanger is the main component for cooling the temperature of the steam output by the steam generating device. One end of the steam turbine is provided with an intake pipe, which is connected to the heat exchanger and the steam generating device through a heat exchange pipe and a first steam pipe respectively. That is, the heat exchanger is connected to the inlet end of the steam turbine through the heat exchange pipe, and the steam generating device is connected to the inlet end of the steam turbine through the first steam pipe.

[0042] In this embodiment, the heat exchange pipe and the first steam pipe can be combined into a unified intake pipe at the inlet of the steam turbine or can be respectively connected to the inlet of the steam turbine. In this embodiment, the first form of combining pipes is adopted to form a unified pipe for the first steam pipe and the heat exchange pipe to enter the steam turbine and be connected to the inlet of the steam turbine.

[0043] The other end of the heat exchanger is connected to the steam generating device, used to pass the steam generated in the steam generating device into the steam turbine through the heat exchanger. The pipeline connecting the heat exchanger and the steam generating device is the second steam pipe.

[0044] For the steam turbine system capable of temperature control provided in this embodiment, the control execution logic is to control the passageways of the first steam pipeline and the second steam pipeline. The control of the passageways of the first steam pipeline and the second steam pipeline is achieved through the first steam control valve and the second steam control valve provided on the first steam pipeline and the second steam pipeline. Specifically, the first steam control valve and the second steam control valve are respectively provided on the first steam pipeline and the second steam pipeline, and the opening and closing of the first steam control valve and the second steam control valve are performed by the temperature control device based on the real-time temperature data collected by the data acquisition device.

[0045] Moreover, in this embodiment, the states of the first steam control valve and the second steam control valve cannot be the same at the same time, that is, when the first steam control valve is open, the second steam control valve is closed. Among them, when the first steam control valve is open and the second steam control valve is closed, it indicates that the real-time temperature data collected by the data acquisition device meets the temperature required to enter the steam turbine. Then, control the first steam control valve to open and the second steam control valve to close to enable the steam to enter the steam turbine through the first steam pipeline to provide power for the operation of the steam turbine. When the second steam control valve is open and the first steam control valve is closed, it indicates that the real-time temperature data collected by the data acquisition device is higher than the temperature required to enter the steam turbine. Then, control the first steam control valve to close and the second steam control valve to open to enable the steam to enter the heat exchanger through the second steam pipeline for heat exchange, that is, temperature reduction treatment, and enter the steam turbine through the heat exchange pipeline to provide power for the operation of the steam turbine.

[0046] In this embodiment, the control of the first steam control valve and the second steam control valve by the temperature control device is achieved based on the hardware design of the first steam control valve and the second steam control valve. Among them, the first steam control valve and the second steam control valve are intelligent control valves, which respectively include the first steam control valve body, the second steam control valve body, and the first control component and the second control component provided on the first steam control valve body and the second steam control valve body. A communication module is provided on the first control component and the second control component, and communication is carried out with the temperature control device through the communication module to receive the temperature control commands in the temperature control device.

[0047] In this embodiment, please refer to Figure 3 , specifically, it is the structural schematic diagram of the heat exchanger. In this embodiment, the heat exchanger is the main temperature regulation hardware unit, which mainly cools the real-time high temperature output from the steam generating device to meet the optimal temperature of the steam turbine.

[0048] Among them, in this embodiment, the heat exchanger is a plate heat exchanger, that is, the temperature is exchanged through multiple heat exchange plates to achieve temperature reduction.

[0049] In this embodiment, the heat exchanger includes a heat exchange space surrounded by multiple groups of plates, and a plurality of heat exchange plates are arranged in the heat exchange space. A steam inlet and a steam outlet are provided on two corresponding groups of plates. The steam to be processed enters through the government-enterprise inlet, and the steam is cooled by passing through the plurality of heat exchange plates. Then it enters the heat exchange pipeline through the steam outlet and further enters the steam turbine through the heat exchange pipeline.

[0050] Among them, since the steam temperature in the steam generating device is not a stable temperature, when processing the steam temperature, different temperature treatments are faced. The basic heat exchange logic of the plate heat exchanger is to achieve a reduction in the temperature of the medium entering the heat exchanger through heat exchange with a certain area and a certain number of heat exchange plates. For this heat exchange logic, to adjust different temperatures to the target temperature, a heat exchanger with a variable heat exchange area needs to be provided. Therefore, in the heat exchanger provided in this embodiment, relative movement can be made between two groups of plates arranged in the heat exchanger, so that the volume of the heat exchange space changes with the relative movement of the groups of plates. In this embodiment, through holes for the heat exchange plates to penetrate are provided on the two relatively moving groups of plates. By moving the two groups of plates along the arrangement direction of the heat exchange plates, it is equivalent to adjusting the contact area between the heat exchange plates and the steam, and by adjusting the contact surface, the change in the steam heat exchange area can be realized, so that different temperatures of the steam entering the heat exchanger can be adjusted.

[0051] In the above content, based on the settings of the components in the steam turbine system, the target temperature entering the steam turbine is obtained based on the settings of the components, thereby reducing the damage to the metal components in the steam turbine, especially the steam turbine blades, caused by high-temperature steam.

[0052] From the above content, it can be seen that the control system provided in this embodiment is based on computer technology to achieve automatic control. And for the automatic control, a control method is provided in this embodiment to control the control system through this control method. It can be understood that the above embodiments mainly describe the hardware settings in the control system, and the following embodiments need to describe the software-related content.

[0053] Before the description, the following terms need to be explained:

[0054] (1) Responsive to, which is used to represent the conditions or states on which the executed operations depend. When the dependent conditions or states are met, one or more operations to be executed can be real-time or have a set delay; without special instructions, there is no restriction on the execution order of the multiple operations to be executed.

[0055] (2) Based on the conditions or states on which the executed operations depend, when the dependent conditions or states are met, one or more of the executed operations can be real-time or have a set delay; without special instructions, there is no restriction on the execution order of multiple executed operations.

[0056] (3) Model training is to perform multi-classification learning on the sample data set. This model can be constructed using deep learning frameworks such as TensorFlow and torch, and a multi-classification model is composed of a multi-layer combination of neural network layers such as CNN.

[0057] (4) Support Vector Machine (SVM) is a class of generalized linear classifiers that perform binary classification on data in a supervised learning manner, and its decision boundary is the maximum-margin hyperplane solved for the learning samples.

[0058] In this embodiment, for the temperature control model which is the main controlled virtual hardware, this model is not directly set, but is the optimal model obtained through multiple trainings. In this embodiment, the training of this model is described in detail.

[0059] Regarding model training, the main logic is to collect data, and the collected data is aggregated to obtain sample data. In this embodiment, the data can be obtained through known information and public information. And for the temperature control model provided in this embodiment, it is mainly to reduce the damage of the turbine blades in the steam turbine by controlling the temperature. Therefore, the data mainly includes temperature data and the corresponding damage data of the turbine blades. This data can be obtained through limited experiments. Since the turbine blades are large in size, in this embodiment, metal blades of the same material scaled down proportionally can be used for experiments. By setting up experimental control groups and setting temperature gradients within the main temperature range in the steam turbine usage scenario obtained, experiments are carried out at different temperatures to obtain multiple sets of time data, and the multiple sets of experimental data are aggregated to obtain sample data of the blade damage degree and temperature.

[0060] In other embodiments, because the experimental method is too complex and time-consuming, simulation processing can be performed through existing material experimental simulation models, and the above data can be obtained through simulation experiments with different temperature environments.

[0061] Then, empirical mode decomposition is performed on the vibration quantity signals of each metal blade in the sample data to obtain intrinsic mode components, and the time-frequency domain statistical features of each intrinsic mode component in different frequency bands are extracted to form an overall feature set. The obtained overall feature set is evaluated for feature distance, and the most sensitive feature set is selected. The self-organizing neural network feature fusion technology is used to train the optimal feature set to obtain the minimum quantization error index with an obvious performance degradation trend varying with temperature.

[0062] A life prediction model of the second-generation wavelet support vector machine is established by constructing a biorthogonal wavelet support vector machine kernel function based on the second-generation wavelet transform. The obtained minimum quantization error index is used as a prediction feature to quantitatively evaluate the remaining life of the operating state of metal components under small samples.

[0063] And rankings are made for temperatures based on the remaining life, that is, the temperatures in multiple temperature segments obtain corresponding rankings based on the lives of the corresponding metal blades.

[0064] For the temperature control model trained by the above method, which is configured with multiple temperature segments and corresponding lives, in this embodiment, the temperature control for the steam turbine is also mainly based on the remaining life of the above blades. Specifically, it includes the following methods:

[0065] Based on the data acquisition device, the real-time temperature data of the steam generating device is obtained, and the data difference is obtained by comparing the real-time temperature data with the target temperature data.

[0066] In this embodiment, the target data is the optimal data of the steam temperature required to achieve the output power of the steam turbine. It can be understood that the steam temperature for satisfying the output power of the steam turbine is not a specific value but an interval value. For the interval value, the optimal temperature data in the interval range needs to be obtained. In this embodiment, because different temperatures cause different damages to the steam turbine blades, the optimal temperature needs to be determined. The determination of the optimal temperature is obtained based on the temperature control model. Specifically:

[0067] Based on the interval of the target temperature, it is divided to obtain multiple target temperatures.

[0068] The multiple target temperatures are input into the temperature control model to obtain the corresponding remaining life of the steam turbine blades.

[0069] The optimal target temperature is determined based on the ranking of the remaining life.

[0070] Moreover, in some embodiments, the obtaining of the target temperature can be refined. If multiple identical remaining lives are obtained for the remaining life, based on the purpose of maximizing the output power of the steam turbine, the highest temperature among the multiple temperatures is selected as the target temperature.

[0071] In this embodiment, for the accurate acquisition of the target temperature, the damage to the steam turbine blades caused by high temperature is reduced to a certain extent. And obtaining the target temperature can ensure the output power of the steam turbine.

[0072] Refer to Figure 4 , based on the obtained target temperature, the temperature of the steam turbine is controlled, including the following process:

[0073] Step S410, obtain the real-time temperature data of the steam generating device based on the data acquisition device.

[0074] In this embodiment, the real-time temperature data output by the steam generating device is obtained through a temperature sensor arranged at the steam outlet of the steam generating device.

[0075] Step S420, compare the real-time temperature data with the obtained target temperature data to obtain a data difference.

[0076] In this embodiment, this process is mainly used to judge the gap between the target temperature data and the real-time temperature data, and obtain the temperature control method.

[0077] Step S430, determine the first temperature control strategy based on the data difference.

[0078] Step S440, control the opening and closing of the first steam control valve and the second steam control valve corresponding to the first control component and the second control component based on the first temperature control strategy.

[0079] In this embodiment, the data difference includes positive and negative values. When the data difference is positive, it indicates that the real-time temperature data is higher than the target temperature data, that is, the steam temperature output by the steam generating device is high-temperature steam, and the output steam needs to be cooled. The control method adopted for this result is to close the first control component, that is, close the first steam control valve, and open the second control component, that is, open the second steam control valve. By the above method, the first steam pipeline is closed and the second steam pipeline is opened, so that the output steam enters the heat exchanger for heat exchange treatment.

[0080] And in this embodiment, since the first steam pipeline has a certain length, and the steam transmitted during the length process will have heat loss due to the distance, in order to accurately control the temperature, the heat loss can be determined and the real-time temperature data can be optimized. The heat loss can be obtained based on the ratio between the inlet temperature data of the first steam pipeline and the temperature data output from the outlet of the first steam pipeline during multiple steam transmission processes. For the determined heat loss parameter, the real-time temperature data can be optimized. For example, when the collected real-time temperature data is A and the heat loss parameter is B, the optimized real-time temperature data at the outlet of the first steam pipeline is A * B, and the difference can be compared again for this result, and the temperature control can be optimized based on this difference.

[0081] Step S450, when the second steam control valve is in the open state and the first steam control valve is in the closed state, control the relative movement of the group board based on the second control strategy to change the heat exchange space volume to the target heat exchange space volume.

[0082] In this embodiment, when the real-time temperature data is greater than the target temperature data, the steam is input into the heat exchanger through the second steam pipeline, and the temperature is reduced by changing the area of the heat exchange plates in the heat exchanger. The specific methods are as follows:

[0083] Step S451, establish a heat exchange area - temperature change curve.

[0084] Step S452, obtain the initial heat exchange volume.

[0085] Step S453, determine the target heat exchange volume based on the data difference and the heat exchange area - temperature change curve.

[0086] Step S454, control the movement of the component to the target position based on the heat exchange area and the initial heat exchange area.

[0087] In this embodiment, the heat exchange area - temperature change curve can be obtained according to historical data or specific experimental data, which will not be elaborated here. For the use of the heat exchange area - temperature change curve, the slope of each node in the curve is mainly obtained, and the slopes are averaged to obtain the corresponding heat exchange area - temperature change parameter, and the target heat exchange volume is determined based on the parameter.

[0088] Specifically, for the target temperature data and the corresponding initial heat exchange volume, the target heat exchange volume is determined.

[0089] In this embodiment, for step S454, the following methods are included:

[0090] Obtain the initial coordinate points of the component to be moved and the corresponding component

[0091] Determine the initial distance based on the initial coordinate points

[0092] Determine the target distance based on the target heat exchange volume

[0093] Control the movement of the component to the target coordinate point based on the target distance.

[0094] The initial coordinate point of the component to be moved can be understood as the initial coordinate point before the component to be moved works, and the coordinate point after movement after successive temperature treatments.

[0095] In this embodiment, the component to be moved can be a group of boards or two groups of boards. That is, one group of boards can be moved towards another corresponding group of boards, or two corresponding groups of boards can be moved relative to each other.

[0096] The difference between the movement logic for two corresponding groups of boards and that for one group of boards is that the movement distance for two groups of boards is half of the movement distance for one group of boards.

[0097] In this embodiment, by changing the heat exchange volume in the heat exchange plate, the corresponding temperature is obtained.

[0098] In this embodiment, the above content mainly focuses on the processing method when the real-time temperature data is higher than the target temperature data. When the real-time temperature data is lower than the target temperature data, the real-time temperature data also needs to be controlled, and the control method is mainly heating control. In this embodiment, for heating control, a heating module is provided in the steam generating device to control the steam temperature in the steam generating device. For heating the steam in the steam generating module, the temperature can be controlled by setting a PID control method.

[0099] In other embodiments, a heating module can also be set in the first steam pipeline to heat the steam entering the first steam pipeline, and the heating control method can also be carried out by the PID control method. Among them, the PID control method adopts the existing control method and does not need to be described in detail.

[0100] In this embodiment, since the temperature control device includes: at least one processor, a memory, a user interface, and at least one network interface. Each component in the temperature control device is coupled together through a bus system. It can be understood that the bus system is used to realize the connection and communication between these components. The bus system includes, in addition to the data bus, a power bus, a control bus, and a status signal bus.

[0101] It can be understood that the memory can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. The memory in the embodiments of the present invention can store data to support the operation of the terminal. Examples of such data include: any computer programs for operating on the terminal, such as an operating system and application programs. Among them, the operating system contains various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application programs can include various application programs.

[0102] In some embodiments, the temperature control device training device provided by the embodiments of the present invention can be implemented in a combination of software and hardware. As an example, the temperature control device provided by the embodiments of the present invention can be a processor in the form of a hardware decoding processor, which is programmed to execute the temperature control method provided by the embodiments of the present invention. For example, the processor in the form of a hardware decoding processor can employ one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components.

[0103] As an example of the temperature control device provided by the embodiments of the present invention being implemented in a combination of software and hardware, the temperature control device provided by the embodiments of the present invention can be directly embodied as a combination of software modules executed by a processor. The software modules can be located in a storage medium, and the storage medium is located in the memory. The processor reads the executable instructions included in the software modules in the memory and combines the necessary hardware (for example, including the processor and other components connected to the bus) to complete the feature extraction training method provided by the embodiments of the present invention.

[0104] As an example, the processor can be an integrated circuit chip with the ability to process signals, such as a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor can be a microprocessor or any conventional processor, etc.

[0105] As an example of the temperature control device provided by the embodiments of the present invention implemented in hardware, the device provided by the embodiments of the present invention can be directly implemented by a processor in the form of a hardware decoding processor. For example, it can be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components to implement the feature extraction model training method provided by the embodiments of the present invention.

[0106] The memory in the embodiments of the present invention is used to store various types of data to support the operation of the temperature control device. Examples of these data include: any executable instructions for operating on the temperature control device, such as executable instructions. The program implementing the feature extraction model training method of the embodiments of the present invention can be included in the executable instructions.

[0107] In some embodiments, the server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms. The terminal (such as terminal 10-1) can be a smart phone, a tablet computer, a laptop computer, a desktop computer, etc., but is not limited thereto. The terminal and the server can be directly or indirectly connected through wired or wireless communication methods, and there is no limitation in the embodiments of the present application.

[0108] Moreover, this embodiment also provides an electronic device. In one aspect of the present application, the present application also provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes different embodiments and combinations of the embodiments provided in various alternative implementations of the above temperature control method.

[0109] In several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of the device or unit can be in electrical, mechanical, or other forms.

[0110] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0111] In addition, each functional unit in various embodiments of the present application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0112] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application. The aforementioned storage medium includes: USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical disks and other various media that can store program codes.

[0113] As described above, the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of various embodiments of the present application.

Claims

1. A control method for an esterification steam turbine system, characterized in that, The esterification steam turbine system includes an esterification steam turbine device, and the esterification steam turbine device includes a steam turbine, a heat exchanger connected to the steam turbine, and a steam generating device; the steam turbine includes an intake pipeline, the intake pipeline is connected to the heat exchanger through a heat exchange pipeline, and the intake pipeline is connected to the steam generating device through a first steam pipeline; the heat exchanger is connected to the steam generating device through a second steam pipeline; a first steam control valve and a second steam control valve are respectively arranged on the first steam pipeline and the second steam pipeline, and the first steam control valve and the second steam control valve are intelligent control valves, respectively including a first steam control valve body, a second steam control valve body, and a first control component and a second control component arranged on the first steam control valve body and the second steam control valve body; the heat exchanger includes a heat exchange space surrounded by multiple groups of plates, and a heat exchange inlet and a heat exchange outlet are respectively arranged on the corresponding plates of the multiple groups of plates; the corresponding plates can selectively move relative to each other, so that the area of the heat exchange space changes with the movement of the plates. It further includes a control subsystem, and the control subsystem communicates with the first control component and the second control component in the steam turbine device; the control subsystem further includes a data acquisition device and a temperature control device, the data acquisition device is arranged at the steam outlet of the steam generating device and is used for acquiring the real-time temperature of the steam outlet of the steam generating device; the temperature control device is electrically connected to the data acquisition device, the first control component and the second control component, and a temperature control model is configured in the temperature control device, and the temperature control model controls the opening and closing of the first steam control valve and the second steam control valve by the first control component and the second control component based on the real-time data acquired by the data acquisition device; the temperature control model includes a first temperature control model and a second temperature control model, a temperature control strategy is configured in the first temperature control model, and the temperature control strategy is used for controlling the opening and closing of the first steam control valve and the second steam control valve by the first control component and the second control component; the second temperature control model is used for controlling the relative movement of the plates to realize the change of the volume of the heat exchange space. It includes the following method: Based on the real-time data of steam acquired by the data acquisition device, compare the real-time data with the target data to obtain a data difference; the target data is the optimal data of the steam temperature required to achieve the output power of the steam turbine. The determination of the optimal temperature is obtained based on a temperature control model. Specifically: divide the interval of the target temperature to obtain multiple target temperatures; input the multiple target temperatures into the temperature control model to obtain the remaining life of the corresponding steam turbine blades; determine the optimal target temperature based on the ranking of the remaining life; multiple temperature segments and corresponding lives are configured in the temperature control model, and the temperature control model is the optimal model obtained through multiple trainings. The training method of the temperature control model includes: obtaining temperature data and the corresponding damage data of the steam turbine blades, specifically including: setting different temperature experiments by setting gradients for the temperatures within the main temperature range in the steam turbine usage scenario obtained by setting an experimental control group to obtain multiple groups of experimental data, and aggregating the multiple groups of experimental data to obtain sample data of the blade damage degree and temperature; then perform empirical mode decomposition on the vibration signal of each metal blade in the sample data to obtain intrinsic mode components, extract the time-frequency domain statistical features of each different frequency band intrinsic mode component, form an overall feature set, evaluate the feature distance of the obtained overall feature set, select the most sensitive feature set, and use the self-organizing neural network feature fusion method to train the optimal feature set to obtain the minimum quantization error index with an obvious performance degradation trend varying with temperature; establish a life prediction model of the second-generation wavelet support vector machine by constructing a bi-orthogonal wavelet support vector machine kernel function based on the second-generation wavelet transform, use the obtained minimum quantization error index as the prediction feature, realize quantitative evaluation of the remaining life of the operating state of metal components under small samples, and rank the temperature based on the remaining life; Determine the first temperature control strategy based on the data difference; Control the opening and closing of the first steam control valve and the second steam control valve corresponding to the first control component and the second control component based on the first temperature control strategy; When controlling the second steam control valve to be in the open state and the first steam control valve to be in the closed state, control the relative movement of the group of plates to change the heat exchange space volume to the target heat exchange space volume based on the second temperature control strategy, including: Establish a heat exchange area - temperature change curve; Obtain the initial heat exchange volume; Determine the target heat exchange volume based on the data difference and the heat exchange area - temperature change curve; Control the movement of the group of plates to the target position based on the target heat exchange area and the initial heat exchange volume, specifically including: Obtain the initial coordinate points of the component to be moved and the corresponding component; Determine the initial distance based on the initial coordinate points; Determine the target distance based on the target heat exchange volume; Control the movement of the group of plates to the target coordinate point based on the target distance.

2. The control method of the esterification steam turbine system according to claim 1, wherein A plurality of heat exchange plates corresponding to the heat exchange inlet and the heat exchange outlet are arranged in the heat exchange space, and the steam entering the heat exchange inlet flows out through the plurality of heat exchange plates through the heat exchange outlet.

3. The control method of the esterification steam turbine system according to claim 1, characterized in that The heat exchange inlet is connected to the outlet of the steam generating device through the second steam pipeline, and the heat exchange outlet is connected to the steam turbine through the heat exchange pipeline.

4. The control method of the esterification steam turbine system according to claim 1, wherein Determine the first temperature control strategy based on the data difference, including: When the data difference is a positive difference, the first temperature control strategy is to control the first steam control valve to close and the second steam control valve to open; When the data difference is a negative difference, the first temperature control strategy is to control the first steam control valve to open and the second steam control valve to close.

5. The control method of the esterification steam turbine system according to claim 4, wherein, The target temperature includes a first target data and a second target data. When the data difference is less than the second target temperature, close the first steam control valve and the second steam control valve, and heat up the steam in the steam generating device until the real-time data is greater than the second target data and less than the first target data.

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