Liquid level warning method, device and electronic equipment for deaerator

Abstract

The present application provides a method, device and electronic equipment for liquid level early warning of a deaerator, which relates to the field of intelligent control of deaerators in thermal power plants. The method includes: obtaining the unit load, the water inlet flow rate from condensate water to the deaerator, the boiler feed water flow rate and the liquid level of the deaerator at each acquisition moment in real time; identifying whether the liquid level regulation of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the water inlet flow rate, the boiler feed water flow rate and the liquid level; and generating a liquid level early warning information of the deaerator in response to the liquid level regulation of the deaerator being in a failure state. This solution can monitor the relevant parameters of the deaerator to identify the failure state of the liquid level regulation of the deaerator, and generate the corresponding liquid level early warning information in time when the liquid level regulation of the deaerator fails, so as to prompt the relevant staff to adjust the feed water deaeration system in time, ensure the stability of the deaerator liquid level, and thus ensure the safe operation of the unit.

Description

Technical Field

[0001] This application relates to the field of intelligent control of deaerators in thermal power plants, and particularly to a method, device and electronic device for liquid level warning of a deaerator. Background Art

[0002] Generally, during the operation of coal-fired generating units, the deaerator not only deaerates the boiler feed water, removes non-condensable gases and heats the feed water, but also stores the boiler feed water. Therefore, whether the liquid level of the deaerator can be maintained normally is the key to ensuring the safe and stable operation of the unit.

[0003] When the liquid level of the deaerator is too low, it will affect the normal operation of the boiler. In severe cases, it will not only cause the boiler to run out of water, endangering the operation safety of the unit, but also cause the steam-driven feed water pump to vaporize. When the liquid level of the deaerator is too high, on the one hand, the water in the deaerator will overflow, resulting in heat source loss, and on the other hand, the deaeration effect of the deaerator will be reduced. Therefore, ensuring the stability of the deaerator liquid level is of great significance for ensuring the safe operation of the unit. Summary of the Invention

[0004] To solve the above problems, this application provides a method, device and electronic device for liquid level warning of a deaerator.

[0005] According to the first aspect of this application, there is provided a method for liquid level warning of a deaerator, including:

[0006] Obtaining in real time the unit load, the water inflow from condensate to the deaerator, the boiler feed water flow rate, and the liquid level of the deaerator at each acquisition moment;

[0007] According to the unit load, the water inflow, the boiler feed water flow rate, and the liquid level, identifying whether the liquid level adjustment of the deaerator is in a failure state at each acquisition moment in turn;

[0008] In response to the liquid level adjustment of the deaerator being in a failure state, generating a liquid level warning message for the deaerator.

[0009] In some embodiments of this application, the step of identifying whether the liquid level adjustment of the deaerator is in a failure state at each acquisition moment according to the unit load, the water inflow, the boiler feed water flow rate, and the liquid level includes:

[0010] Determining the flow difference at each acquisition moment according to the water inflow and the boiler feed water flow rate;

[0011] According to the unit load, the flow difference, and the liquid level, identifying whether the liquid level adjustment of the deaerator is in a failure state at each acquisition moment in turn.

[0012] In some embodiments of the present application, identifying whether the level regulation of the deaerator is in a failure state at each of the acquisition moments in sequence according to the unit load, the flow difference, and the liquid level includes:

[0013] According to a preset first time period, determine the unit load change rate, the flow difference change rate, and the liquid level change rate at each of the acquisition moments according to the unit load, the flow difference, and the liquid level;

[0014] For each of the acquisition moments, identify whether the level regulation of the deaerator is in a failure state at the acquisition moment according to the unit load change rate, the flow difference change rate, and the liquid level change rate at the acquisition moment, and the unit load change rate, the flow difference change rate, and the liquid level change rate before the acquisition moment.

[0015] As an implementation manner, identifying whether the level regulation of the deaerator is in a failure state at the acquisition moment according to the unit load change rate, the flow difference change rate, and the liquid level change rate at the acquisition moment, and the unit load change rate, the flow difference change rate, and the liquid level change rate before the acquisition moment includes:

[0016] In response to the unit load change rate within a preset second time period being between the preset positive load change rate and the preset negative load change rate, and the flow difference change rate within the second time period being greater than the preset positive flow difference rate, and the liquid level change rate within the second time period being less than the preset negative liquid level change rate, identify that the level regulation of the deaerator is in a failure state at the acquisition moment; the second time period includes the acquisition moment and a preset time period before the acquisition moment;

[0017] In response to the unit load change rate within the second time period being greater than the positive load change rate, and the flow difference change rate within the second time period being greater than the positive flow difference rate, and the liquid level change rate within the second time period being less than the negative liquid level change rate, identify that the level regulation of the deaerator is in a failure state at the acquisition moment;

[0018] In response to the unit load change rate within the second time period being less than the negative load change rate, and the flow difference change rate within the second time period being less than the preset negative flow difference rate, and the liquid level change rate within the second time period being greater than the preset positive liquid level change rate, identify that the level regulation of the deaerator is in a failure state at the acquisition moment.

[0019] In some other embodiments of the present application, identifying whether the level regulation of the deaerator is in a failure state at each of the acquisition moments in sequence according to the unit load, the feed water flow rate, the boiler feed water flow rate, and the liquid level includes:

[0020] Obtain the characteristic curve graph of the deaerator at each collection moment in sequence according to the unit load, the feed water flow rate, the boiler feed water flow rate, and the liquid level.

[0021] For the characteristic curve graph at each collection moment, based on the method of image recognition, compare the characteristic curve graph with each trend graph in a preset trend graph set; the trend graph set includes multiple trend graphs in the case where the liquid level regulation of the deaerator is in an unfailed state, and each trend graph includes the unit load, the feed water flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the trend of the liquid level of the deaerator.

[0022] In response to the absence of a trend graph in the trend graph set that is consistent with the characteristic curve Figure 1 graph, identify that the liquid level regulation of the deaerator is in a failed state at the corresponding collection moment.

[0023] According to the second aspect of the present application, there is provided another liquid level warning device for a deaerator, including:

[0024] An acquisition module, configured to acquire the unit load, the feed water flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the liquid level of the deaerator in real time at each collection moment.

[0025] An identification module, configured to identify whether the liquid level regulation of the deaerator is in a failed state at each collection moment in sequence according to the unit load, the feed water flow rate, the boiler feed water flow rate, and the liquid level.

[0026] A warning module, configured to generate a liquid level warning message for the deaerator in response to the liquid level regulation of the deaerator being in a failed state.

[0027] In some embodiments of the present application, the identification module is specifically configured to:

[0028] Determine the flow rate difference at each collection moment according to the feed water flow rate and the boiler feed water flow rate.

[0029] Identify whether the liquid level regulation of the deaerator is in a failed state at each collection moment in sequence according to the unit load, the flow rate difference, and the liquid level.

[0030] In some embodiments of the present application, the identification module is specifically configured to:

[0031] According to a preset first time period, determine the unit load change rate, the flow rate difference change rate, and the liquid level change rate at each collection moment according to the unit load, the flow rate difference, and the liquid level.

[0032] For each of the acquisition moments, based on the unit load change rate, the flow difference change rate, and the liquid level change rate at the acquisition moment, as well as the unit load change rate, the flow difference change rate, and the liquid level change rate before the acquisition moment, identify whether the liquid level regulation of the deaerator is in a failure state at the acquisition moment.

[0033] As an implementation manner, the identification module is specifically configured to:

[0034] In response to the unit load change rate within a preset second time period being between the preset positive load change rate and the preset negative load change rate, and the flow difference change rate within the second time period being greater than the preset positive flow difference change rate, and the liquid level change rate within the second time period being less than the preset negative liquid level change rate, identify that the liquid level regulation of the deaerator is in a failure state at the acquisition moment; the second time period includes the acquisition moment and a preset time period before the acquisition moment;

[0035] In response to the unit load change rate within the second time period being greater than the positive load change rate, and the flow difference change rate within the second time period being greater than the positive flow difference change rate, and the liquid level change rate within the second time period being less than the negative liquid level change rate, identify that the liquid level regulation of the deaerator is in a failure state at the acquisition moment;

[0036] In response to the unit load change rate within the second time period being less than the negative load change rate, and the flow difference change rate within the second time period being less than the preset negative flow difference change rate, and the liquid level change rate within the second time period being greater than the preset positive liquid level change rate, identify that the liquid level regulation of the deaerator is in a failure state at the acquisition moment.

[0037] In other embodiments of the present application, the identification module is further configured to:

[0038] According to the unit load, the feed water flow rate, the boiler feed water flow rate, and the liquid level, sequentially obtain the characteristic curve graphs of the deaerator at each acquisition moment;

[0039] For the characteristic curve graph at each acquisition moment, based on the method of image recognition, compare the characteristic curve graph with each trend graph in the preset trend graph set; the trend graph set includes multiple trend graphs in the case where the liquid level regulation of the deaerator is in a non-failure state, and each trend graph includes the unit load, the feed water flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the liquid level trend of the deaerator;

[0040] In response to there being no trend graph in the trend graph set that is Figure 1 consistent with the characteristic curve, identify that the liquid level regulation of the deaerator is in a failure state at the corresponding acquisition moment.

[0041] According to a third aspect of the present application, there is provided an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the method described in the first aspect above is implemented.

[0042] According to a fourth aspect of the present application, there is provided a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, the method described in the first aspect above is implemented.

[0043] According to the technical solution of the present application, by acquiring the unit load, the water inflow from condensate to the deaerator, the boiler feed water flow, and the level of the deaerator at each acquisition moment in real time, and identifying whether the level adjustment of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the water inflow, the boiler feed water flow, and the level, and generating a level warning message for the deaerator when the level adjustment of the deaerator is in a failure state. In this way, by monitoring the relevant parameters of the deaerator, the failure state of the deaerator level adjustment can be identified, and a corresponding level warning message can be generated in time when the deaerator level adjustment fails, so as to prompt the relevant staff to adjust the feed water deaeration system in time, ensure the stability of the deaerator level, and thus ensure the safe operation of the unit.

[0044] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0046] Figure 1 is a flowchart of a method for liquid warning of a deaerator provided by an embodiment of the present application;

[0047] Figure 2 is a flowchart of another method for level warning of a deaerator provided by an embodiment of the present application;

[0048] Figure 3 is a flowchart of yet another method for level warning of a deaerator provided by an embodiment of the present application;

[0049] Figure 4 is an example diagram of the change of relevant parameters of the deaerator in an embodiment of the present application;

[0050] Figure 5 is a structural block diagram of a device for level warning of a deaerator provided by an embodiment of the present application;

[0051] Figure 6A structural block diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0052] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application and should not be construed as limiting the present application.

[0053] It should be noted that during the operation of a coal-fired power generation unit, the deaerator not only deaerates the boiler feed water, removes non-condensable gases, and heats the feed water, but also stores the boiler feed water. Therefore, whether the deaerator level can be maintained normally is the key to ensuring the safe and stable operation of the unit. When the deaerator level is too low, it will affect the normal operation of the boiler. In severe cases, it will not only cause the boiler to run out of water, endangering the operation safety of the unit, but also cause the steam-driven feed water pump to vaporize. When the deaerator level is too high, on the one hand, the water in the deaerator will overflow, causing heat source loss, and on the other hand, the deaeration effect of the deaerator will be reduced. Therefore, ensuring the stability of the deaerator level is of great significance for ensuring the safe operation of the unit.

[0054] To solve the above problems, the present application provides a method, device, and electronic device for warning the level of a deaerator. Figure 1 A flowchart of a method for warning the liquid level of a deaerator provided by an embodiment of the present application. It should be noted that the method for warning the liquid level of the deaerator in the embodiments of the present application can be used in the device for warning the liquid level of the deaerator in the embodiments of the present application, and the device for warning the liquid level of the deaerator in the embodiments of the present application can be configured in an electronic device. As Figure 1 shown, the method may include the following steps:

[0055] Step 101, obtain the unit load, the water inflow from the condensate to the deaerator, the boiler feed water flow, and the deaerator level at each acquisition moment in real time.

[0056] In some embodiments of the present application, the acquisition moment may be a moment for presetting the acquisition of data. In addition, the time interval for presetting the acquisition of data may also be set. The time interval between consecutive acquisition moments is the preset time interval. Among them, obtaining the unit load, the water inflow from the condensate to the deaerator, the boiler feed water flow, and the deaerator level at each acquisition moment in real time means obtaining the unit load, the water inflow from the condensate to the deaerator, the boiler feed water flow, and the deaerator level at that moment in real time at each acquisition moment.

[0057] In some embodiments of the present application, there may be data format problems or null value problems with the collected unit load, the water supply flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the level of the deaerator. This method further includes performing data integration processing on the collected data to meet the format requirements, and when null values occur, filling the null values in a preset manner or repeatedly obtaining the data at the corresponding moment.

[0058] Step 102, based on the unit load, the water supply flow rate, the boiler feed water flow rate, and the level, sequentially identify whether the level adjustment of the deaerator is in a failure state at each collection moment.

[0059] That is to say, at each collection moment, it is determined whether the level adjustment of the deaerator is in a failure state based on the collected unit load, the water supply flow rate, the boiler feed water flow rate, and the level.

[0060] It should be noted that the deaerator can automatically adjust the level according to its own level condition to ensure the stability of the deaerator level. However, in actual factory scenarios, there are cases where the level adjustment of the deaerator fails, that is, the level adjustment of the deaerator cannot ensure the stability of the deaerator level. At this time, relevant staff need to intervene and operate the unit system to ensure the safe operation of the unit. However, the relevant staff cannot timely learn that the level adjustment of the deaerator fails. Therefore, to ensure the stability of the deaerator level, the present application monitors the unit load, the water supply flow rate from the condenser to the deaerator, the boiler feed water flow rate, and the level of the deaerator to identify whether the level adjustment of the deaerator is in a failure state, so as to issue a warning in time when the level adjustment of the deaerator is in a failure state to remind the relevant staff.

[0061] In some embodiments of the present application, the unit load, the water supply flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the level of the deaerator at each collection moment can be stored in chronological order, and a characteristic curve graph is generated based on the data at this collection moment and the data before this collection moment at each collection moment. The characteristic curve graph includes a unit load characteristic curve, a water supply flow rate characteristic curve of the deaerator, a boiler feed water flow rate characteristic curve, and a level characteristic curve of the deaerator, and each curve is obtained by fitting the data at each collection moment. By means of image recognition, the characteristic curve graph is compared with each trend graph in the preset trend graph set. If there is a trend graph in the trend graph set that Figure 1 is consistent with the characteristic curve, then the level adjustment of the deaerator at the corresponding moment is in an effective state; otherwise, the level adjustment of the deaerator at the corresponding moment is in a failure state. Among them, the trend graph set includes trend graphs composed of the data values of the unit load, the water supply flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the level of the deaerator at each moment under all normal operating states.

[0062] In some other embodiments of the present application, a preset recognition model can be used to determine whether the level adjustment of the deaerator is in a failure state. The preset recognition model can be trained by a training set of unit load, feed water flow from condensate to the deaerator, boiler feed water flow, and deaerator level data under normal operation. The data obtained at the current acquisition moment and the data obtained within a preset time period before the current acquisition moment can be input into the recognition model in the form of a sequence. The recognition model performs feature extraction and learning based on the input data to obtain the recognition result of whether the level adjustment of the deaerator is in a failure state.

[0063] In some other embodiments of the present application, the flow difference at each acquisition moment can be determined according to the boiler feed water flow and the feed water flow from condensate to the deaerator at each acquisition moment; at each acquisition moment, according to the unit load, flow difference, and deaerator level at the current acquisition moment and a period of time before this acquisition moment, the change trends of the unit load, flow difference, and deaerator level are determined, and whether the level adjustment of the deaerator is in a failure state is recognized according to the change trends of the unit load, flow difference, and deaerator level.

[0064] Step 103, in response to the level adjustment of the deaerator being in a failure state, generate a level warning message for the deaerator.

[0065] That is to say, if it is recognized that the level adjustment of the deaerator is in a failure state at a certain acquisition moment, a level warning message for the deaerator is generated at this acquisition moment to remind relevant staff to process it in time.

[0066] In some embodiments of the present application, the level warning message of the deaerator can be displayed through the visualization interface of the terminal device that executes this method. For example, when a computer of relevant staff executes this warning method and the level adjustment of the deaerator is in a failure state at a certain acquisition moment, the generated level warning message of the deaerator can be displayed in the warning display area of this computer. The level warning message of the deaerator can include identification information for indicating the failure of the level adjustment of the deaerator, and can also include the abnormal level information of the current deaerator. For example, if the level adjustment of the deaerator fails at the current acquisition moment and the level of the deaerator continues to rise, the generated level warning message of the deaerator can include identification information for indicating the failure of the level adjustment of the deaerator and identification information for indicating the rising level of the deaerator.

[0067] The method for warning of the liquid level of the deaerator according to the embodiment of the present application obtains the unit load, the water inflow from the condensate to the deaerator, the boiler feed water flow rate, and the liquid level of the deaerator at each acquisition moment in real time, and identifies whether the liquid level adjustment of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the water inflow, the boiler feed water flow rate, and the liquid level. When the liquid level adjustment of the deaerator is in a failure state, a liquid level warning message for the deaerator is generated. In this way, by monitoring the relevant parameters of the deaerator, the failure state of the liquid level adjustment of the deaerator can be identified, and a corresponding liquid level warning message can be generated in time when the liquid level adjustment of the deaerator fails, so as to prompt the relevant staff to adjust the feed water deaeration system in time, ensure the stability of the liquid level of the deaerator, and thus ensure the safe operation of the unit.

[0068] Next, a detailed introduction will be made to identifying whether the liquid level adjustment of the deaerator is in a failure state.

[0069] Figure 2 It is a flowchart of another method for warning of the liquid level of the deaerator provided by the embodiment of the present application. As Figure 2 shown, the method may include the following steps:

[0070] Step 201, obtain the unit load, the water inflow from the condensate to the deaerator, the boiler feed water flow rate, and the liquid level of the deaerator at each acquisition moment in real time.

[0071] Step 202, determine the flow difference at each acquisition moment according to the water inflow and the boiler feed water flow rate.

[0072] That is to say, every time the water inflow from the condensate to the deaerator and the boiler feed water flow rate at the corresponding acquisition moment are obtained, the flow difference at the acquisition moment is calculated according to the water inflow from the condensate to the deaerator and the boiler feed water flow rate at the acquisition moment.

[0073] In some embodiments of the present application, for each acquisition moment, the boiler feed water flow rate at the acquisition moment may be subtracted from the water inflow from the condensate to the deaerator at the acquisition moment to obtain the flow difference at the acquisition moment.

[0074] Step 203, identify whether the liquid level adjustment of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the flow difference, and the liquid level.

[0075] In some embodiments of the present application, curve fitting may be performed based on the unit load, the flow difference, and the liquid level at the current acquisition moment and the preset time period before the current acquisition moment to obtain a corresponding characteristic curve graph. The characteristic curve graph is compared with each trend graph in the preset set of characteristic graphs. If there is a characteristic curve in the set of characteristic graphs Figure 1If the obtained characteristic diagram is consistent, it indicates that the liquid level regulation of the deaerator is normal at the current acquisition moment. Otherwise, it indicates that the liquid level regulation of the deaerator is in a failure state at the current acquisition moment. Among them, the set of characteristic diagrams includes all the trend charts composed of the unit load, flow difference, and liquid level within a certain period of time under normal operating conditions.

[0076] In some other embodiments of the present application, it is also possible to identify whether the liquid level regulation of the deaerator is in a failure state according to the changes in the unit load, flow difference, and liquid level of the deaerator over a period of time. Among them, the changes in the unit load, flow difference, and liquid level of the deaerator over a period of time can be determined by the corresponding change rates. As an implementation manner, the implementation process of step 203 may include the following steps:

[0077] Step 203-1, according to the preset first time period, determine the unit load change rate, flow difference change rate, and liquid level change rate at each acquisition moment based on the unit load, flow difference, and liquid level.

[0078] In some embodiments of the present application, the preset first time period refers to the time interval used to calculate the unit load change rate, flow difference change rate, and liquid level change rate. It should be noted that the first time period may be the same as or different from the time interval for preset data acquisition, and can be determined according to actual needs here.

[0079] That is to say, after obtaining the corresponding unit load, flow difference, and liquid level of the deaerator at each acquisition moment, based on the first time period, determine the unit load, flow difference, and liquid level of the deaerator at the target acquisition moment for calculating the change rate, and based on the unit load at the current acquisition moment and the unit load at the corresponding target acquisition moment, as well as the first time period, determine the unit load change rate at the current acquisition moment. Based on the flow difference at the current acquisition moment and the flow difference at the corresponding target acquisition moment, as well as the first time period, determine the flow difference change rate at the current acquisition moment. Based on the liquid level at the current acquisition moment and the liquid level at the corresponding target acquisition moment, as well as the first time period, determine the liquid level change rate at the current acquisition moment.

[0080] As an example, if the first time period is 1 minute and the time interval for data acquisition is also 1 minute, the unit load change rate at the current acquisition moment can be the difference between the unit load at the current acquisition moment and the unit load at the previous acquisition moment divided by 1 minute.

[0081] Step 203-2, for each acquisition moment, identify whether the liquid level regulation of the deaerator is in a failure state at the acquisition moment according to the unit load change rate, flow difference change rate, and liquid level change rate at the acquisition moment, and the unit load change rate, flow difference change rate, and liquid level change rate before the acquisition moment.

[0082] In some embodiments of the present application, a positive load change rate and a negative load change rate can be preset respectively. If the unit load change rate at a certain acquisition moment is greater than the positive load change rate, it indicates that the unit load is increasing. If the unit load change rate at a certain acquisition moment is less than the negative load change rate, it indicates that the unit load is decreasing. If the unit load change rate at a certain acquisition moment is between the positive load change rate and the negative load change rate, it indicates that the unit load is in a stable state. Similarly, a positive flow difference change rate, a negative flow difference change rate, a positive liquid level change rate, and a negative liquid level change rate are also set respectively to judge the changes in the unit load, flow difference, and liquid level.

[0083] In some embodiments of the present application, the implementation process of step 203-2 may include the following judgment logics: (1) In response to the unit load change rate within a preset second time period being between the preset positive load change rate and the preset negative load change rate, and the flow difference change rate within the second time period being greater than the preset positive flow difference change rate, and the liquid level change rate within the second time period being less than the preset negative liquid level change rate, it is recognized that the liquid level regulation of the deaerator is in a failure state at the acquisition moment; wherein, the second time period includes the acquisition moment and a preset time period before the acquisition moment. For example, the second time period can be two minutes before the acquisition moment and the acquisition moment; (2) In response to the unit load change rate within the second time period being greater than the positive load change rate, and the flow difference change rate within the second time period being greater than the positive flow difference change rate, and the liquid level change rate within the second time period being less than the negative liquid level change rate, it is recognized that the liquid level regulation of the deaerator is in a failure state at the acquisition moment; (3) In response to the unit load change rate within the second time period being less than the negative load change, and the flow difference change rate within the second time period being less than the preset negative flow difference change rate, and the liquid level change rate within the second time period being greater than the preset positive liquid level change rate, it is recognized that the liquid level regulation of the deaerator is in a failure state at the acquisition moment.

[0084] In addition, in the process of identifying whether the level regulation of the deaerator is in a failure state, it further includes: (1) If the unit load change rate at the current acquisition moment is between the positive load change rate and the negative load change rate, and the flow difference change rate at the current acquisition moment is between the positive flow difference change rate and the negative flow difference change rate, and the level change rate at the current acquisition moment is between the positive level change rate and the negative level change rate, then it is considered that the water level regulation of the deaerator is reliable and not failed; (2) If the unit load change rate at the current acquisition moment is greater than the positive load change rate, and the flow difference change rate at the current acquisition moment is greater than the positive flow difference change rate, and the level change rate at the current acquisition moment is between the positive level change rate and the negative level change rate, then it is considered that the water level regulation of the deaerator is reliable and not failed; (3) If the unit load change rate at the current acquisition moment is less than the negative load change rate, and the flow difference change rate at the current acquisition moment is less than the negative flow difference change rate, and the level change rate at the current acquisition moment is between the positive level change rate and the negative level change rate, then it is considered that the water level regulation of the deaerator is reliable and not failed.

[0085] Step 204, in response to the level regulation of the deaerator being in a failure state, generate a level warning message for the deaerator.

[0086] According to the level warning method for the deaerator in the embodiments of the present application, the flow difference at each acquisition moment is determined through the feed water flow and the boiler feed water flow, and according to the preset time period, the unit load change rate, the flow difference change rate, and the level change rate at each acquisition moment are determined based on the unit load, the flow difference, and the level. Thus, the change situations of each parameter can be judged according to the unit load change rate, the flow difference change rate, and the level change rate at each acquisition moment, so as to identify whether the level regulation of the deaerator is in a failure state, which serves as the basis for accurately generating a warning message.

[0087] Based on another way of identifying whether the level regulation of the deaerator is in a failure state, the present application proposes another embodiment.

[0088] Figure 3 It is a flowchart of another level warning method for the deaerator provided by the embodiments of the present application. As Figure 3 shown, the method includes:

[0089] Step 301, obtain the unit load, the feed water flow from the condensate to the deaerator, the boiler feed water flow, and the level of the deaerator in real time at each acquisition moment.

[0090] Step 302, successively obtain the characteristic curve graph of the deaerator at each acquisition moment according to the unit load, the feed water flow, the boiler feed water flow, and the level.

[0091] In some embodiments of the present application, at each acquisition moment, based on the unit load, feedwater flow rate, boiler feedwater flow rate, and liquid level at that acquisition moment, as well as the unit load, feedwater flow rate, boiler feedwater flow rate, and liquid level at multiple acquisition moments within a preset time period before that acquisition moment, the unit load characteristic curve, feedwater flow rate characteristic curve, boiler feedwater flow rate characteristic curve, and liquid level characteristic curve at that acquisition moment are respectively fitted, and the unit load characteristic curve, feedwater flow rate characteristic curve, boiler feedwater flow rate characteristic curve, and liquid level characteristic curve at that acquisition moment are combined into a characteristic curve graph of the deaerator at that acquisition moment.

[0092] Step 303, for the characteristic curve graph at each acquisition moment, based on image recognition, compare the characteristic curve graph with each trend graph in a preset trend graph set; the trend graph set includes multiple trend graphs in the state where the liquid level regulation of the deaerator is not failed, and each trend graph includes the unit load, feedwater flow rate from condensate to the deaerator, boiler feedwater flow rate, and the trend of the liquid level of the deaerator.

[0093] That is to say, before executing this method, collect the unit load, feedwater flow rate from condensate to the deaerator, boiler feedwater flow rate, and liquid level data of the deaerator at different time periods when the liquid level regulation of the deaerator is not failed, and fit the data at each time period into corresponding trend graphs respectively. The trend graph set including multiple trend graphs is used as the basis for judging whether the liquid level regulation of the deaerator is in a failed state.

[0094] Step 304, in response to the non-existence of a trend graph consistent with the characteristic curve Figure 1 in the trend graph set, identify that the liquid level regulation of the deaerator is in a failed state at the corresponding acquisition moment.

[0095] It can be understood that if the trend of each curve in the characteristic curve graph is consistent with the trend of each curve in a certain trend graph in the trend graph set, it can be explained that the liquid level of the deaerator at that acquisition moment is normal, that is, the liquid level regulation of the deaerator is in an effective state. If there is no trend graph in the trend graph set that is consistent with the trend of the characteristic curve graph, it can be considered that the trend of the characteristic curve graph at that acquisition moment is inconsistent with the trend of each parameter in the normal operation state, that is, the liquid level regulation of the deaerator is in a failed state at the corresponding acquisition moment.

[0096] Step 305, in response to the liquid level regulation of the deaerator being in a failed state, generate a liquid level warning message for the deaerator.

[0097] In some embodiments of the present application, since the liquid level warning information of the deaerator may include information indicating that the liquid level adjustment of the deaerator is in a failure state and may also include information indicating the liquid level state of the deaerator, the rising or falling of the liquid level at the current acquisition moment can be determined by identifying the trend of the liquid level curve in the characteristic curve graph, so as to generate the liquid level warning information of the deaerator.

[0098] According to the liquid level warning method of the deaerator in the embodiments of the present application, by generating a corresponding characteristic curve graph according to the unit load, the water supply flow rate, the boiler feed water flow rate and the liquid level, and based on the image recognition method, comparing the characteristic curve graph with each trend graph in the preset trend graph set, when there is no trend graph in the trend graph set that is consistent with the trend of the characteristic curve graph, it is recognized that the liquid level adjustment of the deaerator is in a failure state. This method does not require a large amount of data calculation, and only determines whether the liquid level adjustment of the deaerator is in a failure state through image recognition, which can reduce the calculation consumption of the liquid level warning method.

[0099] Next, the above method will be described in an illustrative manner. Figure 4 It is a schematic diagram of the change of the relevant parameters of the deaerator. As Figure 4 shown, in the time period from 14:00 to 15:00, the unit load is stable, the water supply flow rate from the condensate to the deaerator decreases, while the boiler feed water flow rate does not change, that is, the flow rate difference between the two increases, and at the same time the liquid level of the deaerator shows a downward trend, then it is recognized that the liquid level adjustment of the deaerator is in a failure state, and the corresponding liquid level warning information is generated.

[0100] To implement the above embodiments, the present application provides a liquid level warning device for a deaerator.

[0101] Figure 5 It is a structural block diagram of a liquid level warning device for a deaerator provided by an embodiment of the present application. As Figure 5 shown, the device includes:

[0102] An acquisition module 501, configured to acquire the unit load, the water supply flow rate from the condensate to the deaerator, the boiler feed water flow rate and the liquid level of the deaerator in real time at each acquisition moment;

[0103] An identification module 502, configured to identify whether the liquid level adjustment of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the water supply flow rate, the boiler feed water flow rate and the liquid level;

[0104] A warning module 503, configured to generate liquid level warning information of the deaerator in response to the liquid level adjustment of the deaerator being in a failure state.

[0105] In some embodiments of the present application, the identification module 502 is specifically configured to:

[0106] Determine the flow difference at each acquisition moment according to the make-up water flow rate and the boiler feed water flow rate;

[0107] According to the unit load, the flow difference and the liquid level, identify whether the liquid level regulation of the deaerator is in a failure state at each acquisition moment in sequence.

[0108] In some embodiments of the present application, the identification module 502 is specifically configured to:

[0109] According to the preset first time period, determine the unit load change rate, the flow difference change rate and the liquid level change rate at each acquisition moment according to the unit load, the flow difference and the liquid level;

[0110] For each acquisition moment, identify whether the liquid level regulation of the deaerator is in a failure state at the acquisition moment according to the unit load change rate, the flow difference change rate and the liquid level change rate at the acquisition moment, and the unit load change rate, the flow difference change rate and the liquid level change rate before the acquisition moment.

[0111] As an implementation manner, the identification module 502 is specifically configured to:

[0112] In response to that the unit load change rate within the preset second time period is between the preset positive load change rate and the preset negative load change rate, and the flow difference change rate within the second time period is greater than the preset positive flow difference change rate, and the liquid level change rate within the second time period is less than the preset negative liquid level change rate, identify that the liquid level regulation of the deaerator is in a failure state at the acquisition moment; the second time period includes the acquisition moment and a preset time period before the acquisition moment;

[0113] In response to that the unit load change rate within the second time period is greater than the positive load change rate, and the flow difference change rate within the second time period is greater than the positive flow difference change rate, and the liquid level change rate within the second time period is less than the negative liquid level change rate, identify that the liquid level regulation of the deaerator is in a failure state at the acquisition moment;

[0114] In response to that the unit load change rate within the second time period is less than the negative load change rate, and the flow difference change rate within the second time period is less than the preset negative flow difference change rate, and the liquid level change rate within the second time period is greater than the preset positive liquid level change rate, identify that the liquid level regulation of the deaerator is in a failure state at the acquisition moment.

[0115] In other embodiments of the present application, the identification module 502 is further configured to:

[0116] According to the unit load, the make-up water flow rate, the boiler feed water flow rate and the liquid level, sequentially obtain the characteristic curve graph of the deaerator at each acquisition moment;

[0117] For each characteristic curve graph at each acquisition moment, based on the image recognition method, compare the characteristic curve graph with each trend graph in the preset trend graph set; the trend graph set includes multiple trend graphs in the state where the liquid level regulation of the deaerator is not in a failure state, and each trend graph includes the unit load, the water supply flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the liquid level trend of the deaerator.

[0118] In response to the non-existence of a trend graph in the trend graph set that is consistent with the characteristic curve Figure 1 graph, identify that the liquid level regulation of the deaerator is in a failure state at the corresponding acquisition moment.

[0119] According to the liquid level warning device of the deaerator in the embodiment of the present application, by obtaining the unit load, the water supply flow rate from the condensate to the deaerator, the boiler feed water flow rate, and the liquid level of the deaerator at each acquisition moment in real time, and identifying whether the liquid level regulation of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the water supply flow rate, the boiler feed water flow rate, and the liquid level, and generating a liquid level warning information of the deaerator when the liquid level regulation of the deaerator is in a failure state. In this way, the failure state of the liquid level regulation of the deaerator can be identified by monitoring the relevant parameters of the deaerator, and the corresponding liquid level warning information can be generated in time when the liquid level regulation of the deaerator fails, so as to prompt the relevant staff to adjust the feed water deaeration system in time, ensure the stability of the deaerator liquid level, and thus ensure the safe operation of the unit.

[0120] Figure 6 It is a block diagram of an electronic device for implementing the liquid level warning method of the deaerator according to the embodiment of the present application. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are only examples and are not intended to limit the implementation of the present application described and / or claimed herein.

[0121] As Figure 6As shown, the electronic device includes: a memory 610, a processor 620, and a computer program 630 stored on the memory and executable on the processor. Each component is interconnected using different buses and can be installed on a common motherboard or otherwise installed as needed. The processor can process instructions executed within the electronic device, including instructions stored in the memory or on the memory for displaying graphical information of a GUI on an external input / output device (such as a display device coupled to an interface). In other embodiments, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories if needed. Similarly, multiple electronic devices can be connected, with each device providing part of the necessary operations (such as an array of servers, a set of blade servers, or a multi-processor system).

[0122] The memory 610 is the non-transitory computer-readable storage medium provided by the present application. Among them, the memory stores instructions executable by at least one processor, enabling the at least one processor to execute the method of the above embodiments. The non-transitory computer-readable storage medium of the present application stores computer instructions for causing a computer to execute the method described in the above embodiments.

[0123] The memory 610, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the method in the above embodiments. The processor 620 executes various functional applications and data processing of the server by running the non-transitory software programs, instructions, and modules stored in the memory 610, that is, implementing the method in the above embodiments.

[0124] The memory 610 can include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created according to the use of the electronic device for implementing the method in the above embodiments, etc. In addition, the memory 610 can include high-speed random access memory and can also include non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 610 can optionally include a memory remotely set relative to the processor 620, and these remote memories can be connected to the electronic device for implementing the method in the above embodiments through a network. Examples of the above network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0125] The electronic device according to the method in the above embodiments may further include: an input device 640 and an output device 650. The processor 620, the memory 610, the input device 640, and the output device 650 can be connected through a bus or other means,Figure 6 Take the bus connection as an example.

[0126] The input device 640 can receive input digital or character information and generate key signal inputs related to the user settings and function controls of the electronic device, such as input devices like touchscreens, keypads, mice, trackpads, touchpads, pointing sticks, one or more mouse buttons, trackballs, joysticks, etc. The output device 650 can include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors), etc. The display device can include, but is not limited to, liquid crystal displays (LCDs), light-emitting diode (LED) displays, and plasma displays. In some embodiments, the display device can be a touchscreen.

[0127] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0128] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0129] Any process or method description shown in the flowchart or described in other ways herein can be understood as representing a module, segment, or part of code including one or more executable instructions for implementing a customized logic function or process, and the scope of the preferred embodiments of the present application includes additional implementations, where the functions can be executed in a substantially simultaneous manner or in the reverse order according to the involved functions, rather than in the order shown or discussed, which should be understood by those skilled in the art to which the embodiments of the present application belong.

[0130] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a definable sequence list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other systems that can fetch and execute instructions from the instruction execution system, apparatus, or device), or used in conjunction with these instruction execution systems, apparatus, or devices. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer diskette (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpretation, or otherwise processing as appropriate, and then stored in a computer memory.

[0131] It should be understood that various parts of the present application can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or a combination of the following techniques well known in the art can be used: discrete logic circuits with logic gate circuits for implementing logical functions on data signals, application-specific integrated circuits with suitable combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0132] Those of ordinary skill in the art of this technology can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.

[0133] In addition, each functional unit in various embodiments of the present application may be integrated into one processing module, or each unit may exist physically alone, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0134] The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disc, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present application.

Claims

1. A liquid level warning method for a deaerator, characterized in that, Including: Obtaining in real time the unit load, the water supply flow rate from condensate water to the deaerator, the boiler feed water flow rate, and the level of the deaerator at each collection moment; According to the unit load, the water supply flow rate, the boiler feed water flow rate, and the level, identifying in sequence whether the level adjustment of the deaerator is in a failure state at each collection moment; In response to the level adjustment of the deaerator being in a failure state, generating a level warning message for the deaerator; According to the unit load, the water supply flow rate, the boiler feed water flow rate, and the level, identifying in sequence whether the level adjustment of the deaerator is in a failure state at each collection moment, including: Determining the flow rate difference at each collection moment according to the water supply flow rate and the boiler feed water flow rate; According to the unit load, the flow rate difference, and the level, identifying in sequence whether the level adjustment of the deaerator is in a failure state at each collection moment; including: According to the unit load, the flow rate difference, and the level, determining the unit load change rate, the flow rate difference change rate, and the level change rate at each collection moment in accordance with a preset first time period; For each collection moment, according to the unit load change rate, the flow rate difference change rate, and the level change rate at the collection moment, and the unit load change rate, the flow rate difference change rate, and the level change rate before the collection moment, identifying whether the level adjustment of the deaerator is in a failure state at the collection moment; Or, according to the unit load, the water supply flow rate, the boiler feed water flow rate, and the level, identifying in sequence whether the level adjustment of the deaerator is in a failure state at each collection moment, including: According to the unit load, the water supply flow rate, the boiler feed water flow rate, and the level, obtaining in sequence the characteristic curve graph of the deaerator at each collection moment; For the characteristic curve graph at each collection moment, based on the method of image recognition, comparing the characteristic curve graph with each trend graph in a preset trend graph set; the trend graph set includes multiple trend graphs in the state where the level adjustment of the deaerator is not in a failure state, and each trend graph includes the unit load, the water supply flow rate from condensate water to the deaerator, the boiler feed water flow rate, and the level trend of the deaerator; In response to the non-existence of a trend graph consistent with the characteristic curve graph in the trend graph set, identifying that the level adjustment of the deaerator is in a failure state at the corresponding collection moment.

2. The method according to claim 1, characterized in that, According to the unit load change rate, the flow rate difference change rate, and the level change rate at the collection moment, and the unit load change rate, the flow rate difference change rate, and the level change rate before the collection moment, identifying whether the level adjustment of the deaerator is in a failure state at the collection moment, including: In response to the unit load change rate within a preset second time period being between the preset positive load change rate and the preset negative load change rate, and the flow rate difference change rate within the second time period being greater than the preset positive flow rate difference change rate, and the level change rate within the second time period being less than the preset negative level change rate, identifying that the level adjustment of the deaerator is in a failure state at the collection moment; the second time period includes the collection moment and a preset time period before the collection moment; In response to the unit load change rate in the second time period being greater than the positive load change rate, the flow difference change rate in the second time period being greater than the positive flow difference change rate, and the liquid level change rate in the second time period being less than the negative liquid level change rate, it is recognized that the liquid level regulation of the deaerator is in a failure state at the acquisition moment; In response to the unit load change rate in the second time period being less than the negative load change, the flow difference change rate in the second time period being less than the preset negative flow difference change rate, and the liquid level change rate in the second time period being greater than the preset positive liquid level change rate, it is recognized that the liquid level regulation of the deaerator is in a failure state at the acquisition moment.

3. A liquid level warning device for a deaerator, characterized in that, It includes: An acquisition module for real-time acquiring the unit load, the feed water flow from the condensate to the deaerator, the boiler feed water flow, and the liquid level of the deaerator at each acquisition moment; An identification module for identifying whether the liquid level regulation of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the feed water flow, the boiler feed water flow, and the liquid level; An early warning module for generating a liquid level early warning message of the deaerator in response to the liquid level regulation of the deaerator being in a failure state; The identification module is specifically used for: Determining the flow difference at each acquisition moment according to the feed water flow and the boiler feed water flow; Identifying whether the liquid level regulation of the deaerator is in a failure state at each acquisition moment in sequence according to the unit load, the flow difference, and the liquid level; The identification module is specifically used for: According to a preset first time period, determining the unit load change rate, the flow difference change rate, and the liquid level change rate at each acquisition moment according to the unit load, the flow difference, and the liquid level; For each acquisition moment, identifying whether the liquid level regulation of the deaerator is in a failure state at the acquisition moment according to the unit load change rate, the flow difference change rate, and the liquid level change rate at the acquisition moment, and the unit load change rate, the flow difference change rate, and the liquid level change rate before the acquisition moment; Or, the identification module is used for: Sequentially obtaining the characteristic curve graph of the deaerator at each acquisition moment according to the unit load, the feed water flow, the boiler feed water flow, and the liquid level; For the characteristic curve graph at each acquisition moment, based on the image recognition method, comparing the characteristic curve graph with each trend graph in the preset trend graph set; the trend graph set includes multiple trend graphs in the state where the liquid level regulation of the deaerator is not in a failure state, and each trend graph includes the unit load, the feed water flow from the condensate to the deaerator, the boiler feed water flow, and the liquid level trend; In response to the fact that there is no trend graph in the trend graph set that is consistent with the characteristic curve graph, it is recognized that the liquid level regulation of the deaerator is in a failure state at the corresponding acquisition moment.

4. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, the method described in any one of claims 1 to 2 is implemented.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, the method described in any one of claims 1 to 2 is implemented.

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