Desuperheater outlet temperature detection method and device, storage medium and electronic equipment

Abstract

The invention discloses a desuperheater outlet temperature detection method and device, a storage medium and electronic equipment. The method comprises the steps that a target desuperheater with the outlet temperature to be detected is determined; according to the desuperheating water flow and the steam flow distribution coefficient of the target desuperheater, and the total steam flow value and the total desuperheating water value in a boiler steam-water system where the target desuperheater is located, calculation is conducted, and the outlet steam enthalpy of the target desuperheater is obtained; and calculating according to the outlet steam enthalpy to obtain an outlet temperature value of the target desuperheater. According to the method and the device, the problem that temperature measurement is inaccurate when a sensor breaks down when the temperature of the outlet of the desuperheater is measured through the sensor in the prior art is solved.

Description

Technical Field

[0001] The present application relates to the field of temperature control, and in particular to a method and device for detecting the outlet temperature of a desuperheater, a storage medium and an electronic device. Background Art

[0002] In industrial processes such as oil refining, chemical industry, and energy, real-time monitoring of the desuperheater outlet temperature is of great significance for ensuring the safety, stability, and efficiency of the production process. As one of the variables of temperature control, if the control system fails, the desuperheater outlet temperature will lead to temperature control failure, thus affecting the safety and stability of the production process. In the prior art, the desuperheater outlet temperature is detected by a sensor, but if the sensor fails, the temperature measurement will be inaccurate, thus affecting the accuracy and stability of temperature control.

[0003] With regard to the problem in the related art of measuring the outlet temperature of the desuperheater by using a sensor, which results in inaccurate temperature measurement when a sensor fails, no effective solution has been proposed so far. Summary of the invention

[0004] The main purpose of the present application is to provide a method and device for detecting the outlet temperature of a desuperheater, a storage medium and an electronic device, so as to solve the problem in the related art of measuring the outlet temperature of the desuperheater by a sensor, resulting in inaccurate temperature measurement when the sensor fails.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for detecting the outlet temperature of a desuperheater is provided. The method comprises: determining a target desuperheater whose outlet temperature is to be detected; calculating based on the desuperheating water flow rate of the target desuperheater, the steam flow split coefficient, the total steam flow value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located, to obtain the outlet steam enthalpy of the target desuperheater; calculating based on the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater.

[0006] Furthermore, before obtaining the outlet steam enthalpy of the target desuperheater by calculation based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system in which the target desuperheater is located, the method also includes: determining the number of desuperheaters in the boiler steam-water system in which the target desuperheater is located; and determining the steam flow diversion coefficient based on the number of desuperheaters in the boiler steam-water system.

[0007] Furthermore, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located, including: calculating the difference between the total steam flow value and the total amount of desuperheating water to obtain a first difference; obtaining the inlet steam enthalpy of the target desuperheater and obtaining the enthalpy of the desuperheating water; and obtaining the outlet steam enthalpy of the target desuperheater by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient.

[0008] Further, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient, including: obtaining a first value by calculation based on the steam flow diversion coefficient, the inlet steam enthalpy, the first difference, the enthalpy of the desuperheating water and the desuperheating water flow rate; obtaining a second value by calculation based on the steam flow diversion coefficient, the first difference and the desuperheating water flow rate; and obtaining the outlet steam enthalpy of the target desuperheater based on the ratio of the first value to the second value.

[0009] Furthermore, obtaining the inlet steam enthalpy of the target desuperheater includes: obtaining the inlet steam temperature of the target desuperheater; obtaining the outlet steam pressure of the target desuperheater; and calculating according to the inlet steam temperature and the outlet steam pressure to obtain the inlet steam enthalpy.

[0010] Furthermore, obtaining the outlet steam pressure of the target desuperheater includes: obtaining the drum pressure of the steam drum in the boiler steam-water system where the target desuperheater is located; obtaining the machine-front pressure in the boiler steam-water system where the target desuperheater is located; and calculating based on the drum pressure and the machine-front pressure to obtain the outlet steam pressure.

[0011] Furthermore, the outlet steam pressure is obtained by calculating according to the drum pressure and the pressure in front of the machine, including: calculating the difference between the drum pressure and the pressure in front of the machine to obtain a second difference; determining a target value according to the level corresponding to the target desuperheater; calculating the ratio between the target value and the second difference to obtain a target ratio; calculating the difference between the drum pressure and the target ratio to obtain the outlet steam pressure.

[0012] In order to achieve the above-mentioned purpose, according to another aspect of the present application, a device for detecting the outlet temperature of a desuperheater is provided. The device comprises: a first determination unit, used to determine a target desuperheater whose outlet temperature is to be detected; a first calculation unit, used to calculate based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located, to obtain the outlet steam enthalpy of the target desuperheater; and a second calculation unit, used to calculate based on the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater.

[0013] Furthermore, the device also includes: a second determination unit, used to determine the number of desuperheaters in the boiler steam-water system where the target desuperheater is located before calculating based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located to obtain the outlet steam enthalpy of the target desuperheater; and a third determination unit, used to determine the steam flow diversion coefficient based on the number of desuperheaters in the boiler steam-water system.

[0014] Furthermore, the first calculation unit includes: a first calculation subunit, used to calculate the difference between the total steam flow value and the total cooling water value to obtain a first difference; a first acquisition subunit, used to obtain the inlet steam enthalpy of the target cooler and the enthalpy of the cooling water; a second calculation subunit, used to calculate based on the first difference, the inlet steam enthalpy, the enthalpy of the cooling water, the cooling water flow rate and the steam flow diversion coefficient to obtain the outlet steam enthalpy of the target cooler.

[0015] Furthermore, the second calculation subunit includes: a first calculation module, used to calculate based on the steam flow diversion coefficient, the inlet steam enthalpy, the first difference, the enthalpy of the cooling water and the cooling water flow, to obtain a first value; a second calculation module, used to calculate based on the steam flow diversion coefficient, the first difference and the cooling water flow, to obtain a second value; a determination module, used to obtain the outlet steam enthalpy of the target cooler based on the ratio of the first value to the second value.

[0016] Furthermore, the first acquisition subunit includes: a first acquisition module, used to acquire the inlet steam temperature of the target desuperheater; a second acquisition module, used to acquire the outlet steam pressure of the target desuperheater; and a calculation module, used to calculate based on the inlet steam temperature and the outlet steam pressure to obtain the inlet steam enthalpy.

[0017] Furthermore, the second acquisition module includes: a first acquisition submodule, used to obtain the drum pressure of the steam drum in the boiler steam-water system where the target desuperheater is located; a second acquisition submodule, used to obtain the machine-front pressure in the boiler steam-water system where the target desuperheater is located; and a calculation submodule, used to calculate based on the drum pressure and the machine-front pressure to obtain the outlet steam pressure.

[0018] Furthermore, the calculation submodule includes: a first calculation submodule, used to calculate the difference between the drum pressure and the pre-machine pressure to obtain a second difference; a determination submodule, used to determine the target value according to the level corresponding to the target desuperheater; a second calculation submodule, used to calculate the ratio between the target value and the second difference to obtain a target ratio; and a third calculation submodule, used to calculate the difference between the drum pressure and the target ratio to obtain the outlet steam pressure.

[0019] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a computer-readable storage medium is provided, wherein the storage medium stores a program, wherein when the program is running, the device where the storage medium is located is controlled to execute any one of the above-mentioned methods for detecting the outlet temperature of the desuperheater.

[0020] In order to achieve the above-mentioned purpose, according to another aspect of the present application, an electronic device is also provided, the electronic device includes one or more processors and a memory, and the memory is used to store the method for detecting the outlet temperature of the desuperheater described in any one of the above-mentioned methods implemented by one or more processors.

[0021] Through the present application, the following steps are adopted: determining a target desuperheater for the outlet temperature to be detected; calculating the outlet steam enthalpy of the target desuperheater based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located; calculating based on the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater, which solves the problem in the related art of measuring the outlet temperature of the desuperheater by a sensor, which leads to inaccurate temperature measurement when the sensor fails. In this scheme, the outlet steam enthalpy of the target desuperheater can be calculated according to the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located. Finally, the outlet temperature value of the target desuperheater is calculated through the outlet steam enthalpy. The outlet temperature of the desuperheater can be monitored in real time through the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located, and the outlet steam enthalpy, thereby improving the accuracy of temperature measurement. Through real-time monitoring and control of the outlet temperature of the desuperheater, problems such as excessively high or low temperature in the production process can be avoided, thereby ensuring the safety and stability of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 The process of the method for detecting the outlet temperature of the desuperheater provided in the embodiment of the present application is as follows Figure 1 ;

[0024] Figure 2 Schematic diagram of a boiler steam-water system according to an embodiment of the present application Figure 1 ;

[0025] Figure 3 Schematic diagram of a boiler steam-water system according to an embodiment of the present application Figure 2 ;

[0026] Figure 4 The process of the method for detecting the outlet temperature of the desuperheater provided in the embodiment of the present application is as follows Figure 2 ;

[0027] Figure 5 is a schematic diagram of a computing module provided according to an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of measuring the outlet temperature of a desuperheater according to an embodiment of the present application;

[0029] Figure 7 is a schematic diagram of a device for detecting the outlet temperature of a desuperheater provided in an embodiment of the present application;

[0030] Figure 8 is a schematic diagram of an electronic device provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] It should be noted that the relevant information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for display, data for analysis, etc.) involved in this disclosure are all information and data authorized by the user or fully authorized by all parties. For example, an interface is set between this system and the relevant user or organization. Before obtaining relevant information, it is necessary to send an acquisition request to the aforementioned user or organization through the interface, and obtain relevant information after receiving the consent information fed back by the aforementioned user or organization.

[0035] The present invention is described below in conjunction with preferred implementation steps. Figure 1 The process of the method for detecting the outlet temperature of the desuperheater provided in the embodiment of the present application is as follows Figure 1 ,like Figure 1 As shown, the method comprises the following steps:

[0036] Step S101, determining a target desuperheater whose outlet temperature is to be detected.

[0037] Optionally, according to the structure of the current boiler steam-water system, a target desuperheater for which outlet temperature detection is required is identified.

[0038] Step S102, calculating the outlet steam enthalpy of the target desuperheater based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow rate value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located.

[0039] Optionally, the cooling water flow rate, steam flow diversion coefficient, total steam flow value and total cooling water value of the target desuperheater are obtained, and the cooling water flow rate, steam flow diversion coefficient, total steam flow value and total cooling water value of the target desuperheater are calculated according to the principle of heat balance to obtain the outlet steam enthalpy of the target desuperheater.

[0040] Step S103, calculating according to the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater.

[0041] Optionally, the outlet temperature value is calculated by the outlet steam enthalpy, for example, the outlet steam enthalpy is calculated by using the water and water vapor property calculation formula of IAPWS_IF97 to obtain the above-mentioned outlet temperature value of the target desuperheater.

[0042] For example, using the water and steam property calculation formula of IAPWS_IF97, the desuperheater outlet steam temperature is:

[0043] t sjc =t(p sjr ,h s )

[0044] Among them, t sjc is the outlet steam temperature of the desuperheater (℃), p sjr is the steam pressure at the inlet of the target desuperheater (MPa), h s is the outlet steam enthalpy mentioned above.

[0045] In summary, the outlet steam enthalpy of the target desuperheater can be accurately calculated according to the desuperheating water flow rate, steam flow diversion coefficient, total steam flow value and total desuperheating water value of the target desuperheater. Finally, the outlet temperature value of the target desuperheater is calculated through the outlet steam enthalpy. The outlet temperature of the desuperheater can be monitored in real time through the desuperheating water flow rate, steam flow diversion coefficient, total steam flow value and total desuperheating water value of the target desuperheater as well as the outlet steam enthalpy, thereby improving the accuracy of temperature measurement. Through real-time monitoring and control of the outlet temperature of the desuperheater, problems such as excessively high or low temperature in the production process can be avoided, thereby ensuring the safety and stability of the production process.

[0046] Optionally, in the method for detecting the outlet temperature of the desuperheater provided in the embodiment of the present application, before calculating according to the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located to obtain the outlet steam enthalpy of the target desuperheater, the method also includes: determining the number of desuperheaters in the boiler steam-water system where the target desuperheater is located; and determining the steam flow diversion coefficient based on the number of desuperheaters in the boiler steam-water system.

[0047] In an optional embodiment, the steam flow diversion coefficient is obtained by the following steps: the number of desuperheaters in the boiler steam-water system where the target desuperheater is located is determined, and the steam flow diversion coefficient is determined according to the number of desuperheaters in the boiler steam-water system.

[0048] For example, Figure 2The simplified diagram of the boiler steam-water system shown in the figure shows that the steam is divided into two sides, A and B, and then collected and enters the steam turbine after being cooled. That is, the number of desuperheaters in the boiler steam-water system is 2. Therefore, the steam volume on the two sides is 1 / 2 of the steam flow, that is, the steam flow diversion coefficient is set to 0.5.

[0049] Optionally, in the method for detecting the outlet temperature of the desuperheater provided in the embodiment of the present application, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient, including: obtaining the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located; calculating the difference between the total steam flow value and the total amount of desuperheating water to obtain the first difference; obtaining the inlet steam enthalpy of the target desuperheater and obtaining the enthalpy of the desuperheating water; and obtaining the outlet steam enthalpy of the target desuperheater by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient.

[0050] In an optional embodiment, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient, including: obtaining a first value by calculation based on the steam flow diversion coefficient, the inlet steam enthalpy, the first difference, the enthalpy of the desuperheating water and the desuperheating water flow rate; obtaining a second value by calculation based on the steam flow diversion coefficient, the first difference and the desuperheating water flow rate; and obtaining the outlet steam enthalpy of the target desuperheater based on the ratio of the first value to the second value.

[0051] In an optional embodiment, calculating the outlet steam enthalpy of the target desuperheater includes the following steps: obtaining the total steam flow value D and the total desuperheating water value W in the boiler steam-water system where the target desuperheater is located. j . Calculate the difference between the total steam flow value and the total desuperheating water value to obtain the first difference, and then obtain the inlet steam enthalpy h of the target desuperheater sjr And obtain the enthalpy of desuperheated water h j .

[0052] Then the steam flow split coefficient α, inlet steam enthalpy, first difference, enthalpy of desuperheating water and desuperheating water flow W are calculated. j A first value is obtained by calculation, and a second value is obtained by calculating the steam flow diversion coefficient, the first difference and the desuperheating water flow. Finally, the outlet steam enthalpy of the target desuperheater is obtained by the ratio of the first value to the second value.

[0053] In an optional embodiment, according to the principle of heat balance, the calculation formula of the steam enthalpy at the outlet of the desuperheater is:

[0054] h s =(α·h sjr ·(DWj )+h j W j1 ) / (α·(DW j )+W j1 )

[0055] Where: h s : Steam enthalpy after desuperheating (kJ / kg) (i.e. the above-mentioned outlet steam enthalpy); α: Steam flow split coefficient; h sjr : desuperheater inlet steam enthalpy; D: total steam flow value (t / h); W j : Total amount of cooling water (t / h); h j : enthalpy of desuperheated water (kJ / kg); W j1 : Desuperheating water flow rate (t / h) of the calculated desuperheater outlet temperature.

[0056] The desuperheater outlet steam enthalpy calculation formula established by considering factors such as heat transfer and heat loss inside the desuperheater can more accurately calculate and predict the desuperheater outlet temperature.

[0057] Optionally, in the method for detecting the outlet temperature of the desuperheater provided in an embodiment of the present application, obtaining the inlet steam enthalpy of the target desuperheater includes: obtaining the inlet steam temperature of the target desuperheater; obtaining the outlet steam pressure of the target desuperheater; and calculating based on the inlet steam temperature and the outlet steam pressure to obtain the inlet steam enthalpy.

[0058] In an optional embodiment, the following steps are used to obtain the inlet steam enthalpy of the above-mentioned target desuperheater: obtain the inlet steam temperature of the target desuperheater through a measuring device, and obtain the outlet steam pressure of the target desuperheater; calculate based on the inlet steam temperature and the outlet steam pressure to obtain the inlet steam enthalpy.

[0059] In an optional embodiment, the enthalpy of the desuperheater inlet steam h sjr It is related to the steam temperature and pressure at the desuperheater inlet, namely:

[0060] h sjr =h(t sjr ,p sjr )

[0061] Among them, t sjr : Steam temperature at the desuperheater inlet (℃); p sjr : Steam pressure at the desuperheater outlet (MPa).

[0062] Optionally, in the method for detecting the outlet temperature of the desuperheater provided in an embodiment of the present application, obtaining the outlet steam pressure of the target desuperheater includes: obtaining the drum pressure of the steam drum in the boiler steam-water system where the target desuperheater is located; obtaining the machine-front pressure in the boiler steam-water system where the target desuperheater is located; and calculating based on the drum pressure and the machine-front pressure to obtain the outlet steam pressure.

[0063] In an optional embodiment, there is a measuring device for the steam temperature at the desuperheater inlet, but there is generally no measuring device for the steam pressure at the desuperheater inlet. It is necessary to obtain the outlet steam pressure of the target desuperheater by estimation: first, the drum pressure of the drum in the steam-water system of the boiler where the target desuperheater is located can be collected by a measuring device, and then the machine-front pressure in the steam-water system of the boiler where the target desuperheater is located can be collected, and finally, the outlet steam pressure can be calculated based on the drum pressure and the machine-front pressure.

[0064] The outlet steam pressure of the target desuperheater can be accurately evaluated by the steam drum pressure and the pressure before the machine.

[0065] Optionally, in the method for detecting the outlet temperature of the desuperheater provided in an embodiment of the present application, calculation is performed based on the drum pressure and the pressure before the machine to obtain the outlet steam pressure, including: calculating the difference between the drum pressure and the pressure before the machine to obtain a second difference; determining a target value based on the level corresponding to the target desuperheater; calculating the ratio between the target value and the second difference to obtain a target ratio; calculating the difference between the drum pressure and the target ratio to obtain the outlet steam pressure.

[0066] In an optional embodiment, the outlet steam pressure is calculated by the following steps: first, the difference between the drum pressure and the pressure before the machine is calculated, and then the target value is determined according to the level corresponding to the target desuperheater, for example, the target value corresponding to the first-stage desuperheater may be 2. Then, the outlet steam pressure is calculated according to the ratio between the target value and the second difference and the difference between the drum pressure and the pressure before the machine.

[0067] In an optional embodiment, if Figure 3 The simplified diagram of the boiler steam-water system is shown. The steam pressure at the desuperheater inlet can be estimated using the following formula:

[0068] P1=P b -(P b -P0) / 2

[0069] Where, P1: steam pressure at the outlet of the desuperheater (MPa); P b : Steam drum pressure (MPa); P0: Pressure before the machine (MPa).

[0070] In an optional embodiment, the Figure 4The calculation flow chart of the desuperheater outlet temperature shown in the figure calculates the outlet temperature: first, the inlet steam enthalpy of the desuperheater and the enthalpy of the desuperheater water are calculated, the outlet steam enthalpy of the desuperheater is calculated based on the inlet steam enthalpy and the enthalpy of the desuperheater water, and finally, the outlet temperature is calculated based on the outlet steam enthalpy of the desuperheater.

[0071] In an optional embodiment, the Figure 5 The calculation module of the soft measurement of the outlet temperature of the desuperheater shown calculates the outlet temperature. The definition table in the calculation module is shown in Table 1:

[0072] Table 1

[0073]

[0074]

[0075] In an optional embodiment, the Figure 6 The SAMA diagram shown in the figure is used to calculate the desuperheater outlet temperature: The desuperheater outlet steam enthalpy calculation formula is:

[0076] h s =(α·h sjr ·(DW j )+h j W j1 ) / (α·(DW j )+W j1 )

[0077] Where: h s : Steam enthalpy after desuperheating (kJ / kg); α: Steam flow split coefficient; h sjr : desuperheater inlet steam enthalpy; D: total steam flow value (t / h); W j : Total amount of cooling water (t / h); h j : enthalpy of desuperheated water (kJ / kg); W j1 : Desuperheating water flow rate (t / h) of the calculated desuperheater outlet temperature.

[0078] Enthalpy of steam at desuperheater inlet h sjr It is related to the steam temperature and pressure at the desuperheater inlet, namely:

[0079] h sjr =h(t sjr ,p sjr )

[0080] Where: t sjr : Steam temperature at the desuperheater inlet (℃); p sjr : Steam pressure at the desuperheater inlet (MPa).

[0081] The steam pressure at the desuperheater inlet can be estimated using the following formula: P1 = P b -(P b -P0) / 2, where: P1: steam pressure at the desuperheater inlet (MPa); P b : Steam drum pressure (MPa); P0: Pressure before the machine (MPa).

[0082] The method for detecting the outlet temperature of a desuperheater provided in the embodiment of the present application determines a target desuperheater of which the outlet temperature is to be detected; calculates the outlet steam enthalpy of the target desuperheater according to the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located; calculates according to the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater, thereby solving the problem in the related art of measuring the outlet temperature of the desuperheater by a sensor, which leads to inaccurate temperature measurement when the sensor fails. In this scheme, the outlet steam enthalpy of the target desuperheater can be calculated according to the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located. Finally, the outlet temperature value of the target desuperheater is calculated through the outlet steam enthalpy. The outlet temperature of the desuperheater can be monitored in real time through the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located, and the outlet steam enthalpy, thereby improving the accuracy of temperature measurement. Through real-time monitoring and control of the outlet temperature of the desuperheater, problems such as excessively high or low temperature in the production process can be avoided, thereby ensuring the safety and stability of the production process.

[0083] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0084] The embodiment of the present application also provides a device for detecting the outlet temperature of a desuperheater. It should be noted that the device for detecting the outlet temperature of a desuperheater in the embodiment of the present application can be used to execute the method for detecting the outlet temperature of a desuperheater provided in the embodiment of the present application. The device for detecting the outlet temperature of a desuperheater provided in the embodiment of the present application is introduced below.

[0085] Figure 7 Schematic diagram of a device for detecting the outlet temperature of a desuperheater according to an embodiment of the present application. Figure 7 As shown, the device includes: a first determining unit 701, a first calculating unit 702 and a second calculating unit 703.

[0086] A first determining unit 701 is used to determine a target desuperheater for detecting an outlet temperature;

[0087] The first calculation unit 702 is used to calculate the outlet steam enthalpy of the target desuperheater according to the desuperheating water flow rate of the target desuperheater, the steam flow split coefficient, the total steam flow rate value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located;

[0088] The second calculation unit 703 is used to calculate according to the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater.

[0089] The device for detecting the outlet temperature of a desuperheater provided in the embodiment of the present application determines the target desuperheater of the outlet temperature to be detected by a first determination unit 701; the first calculation unit 702 calculates the outlet steam enthalpy of the target desuperheater according to the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located; the second calculation unit 703 calculates according to the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater, thereby solving the problem in the related art of measuring the outlet temperature of the desuperheater by a sensor, which leads to inaccurate temperature measurement when the sensor fails. In this scheme, the outlet steam enthalpy of the target desuperheater can be calculated according to the cooling water flow rate and steam flow diversion coefficient of the target desuperheater. Finally, the outlet temperature value of the target desuperheater is calculated through the outlet steam enthalpy. The outlet temperature of the desuperheater can be monitored in real time through the cooling water flow rate and steam flow diversion coefficient of the target desuperheater and the outlet steam enthalpy, thereby improving the accuracy of temperature measurement. Through real-time monitoring and control of the outlet temperature of the desuperheater, problems such as excessively high or low temperature in the production process can be avoided, thereby ensuring the safety and stability of the production process.

[0090] Optionally, in the device for detecting the outlet temperature of the desuperheater provided in the embodiment of the present application, the device also includes: a second determination unit, used to determine the number of desuperheaters in the boiler steam-water system where the target desuperheater is located before calculating based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located to obtain the outlet steam enthalpy of the target desuperheater; and a third determination unit, used to determine the steam flow diversion coefficient based on the number of desuperheaters in the boiler steam-water system.

[0091] Optionally, in the detection device for the outlet temperature of the desuperheater provided in the embodiment of the present application, the first calculation unit includes: a first calculation subunit, used to calculate the difference between the total steam flow value and the total cooling water value to obtain a first difference; a first acquisition subunit, used to obtain the inlet steam enthalpy of the target desuperheater and the enthalpy of the cooling water; a second calculation subunit, used to calculate based on the first difference, the inlet steam enthalpy, the enthalpy of the cooling water, the cooling water flow rate and the steam flow diversion coefficient to obtain the outlet steam enthalpy of the target desuperheater.

[0092] Optionally, in the detection device for the outlet temperature of the desuperheater provided in the embodiment of the present application, the second calculation subunit includes: a first calculation module, used to calculate based on the steam flow diversion coefficient, the inlet steam enthalpy, the first difference, the enthalpy of the desuperheating water and the desuperheating water flow rate to obtain a first value; a second calculation module, used to calculate based on the steam flow diversion coefficient, the first difference and the desuperheating water flow rate to obtain a second value; a determination module, used to obtain the outlet steam enthalpy of the target desuperheater based on the ratio of the first value to the second value.

[0093] Optionally, in the detection device for the outlet temperature of the desuperheater provided in the embodiment of the present application, the first acquisition subunit includes: a first acquisition module, used to obtain the inlet steam temperature of the target desuperheater; a second acquisition module, used to obtain the outlet steam pressure of the target desuperheater; and a calculation module, used to calculate based on the inlet steam temperature and the outlet steam pressure to obtain the inlet steam enthalpy.

[0094] Optionally, in the detection device for the outlet temperature of the desuperheater provided in the embodiment of the present application, the second acquisition module includes: a first acquisition sub-module, used to obtain the drum pressure of the steam drum in the boiler steam-water system where the target desuperheater is located; a second acquisition sub-module, used to obtain the machine-front pressure in the boiler steam-water system where the target desuperheater is located; and a calculation sub-module, used to calculate based on the drum pressure and the machine-front pressure to obtain the outlet steam pressure.

[0095] Optionally, in the detection device for the outlet temperature of the desuperheater provided in the embodiment of the present application, the calculation submodule includes: a first calculation submodule, used to calculate the difference between the boiler pressure and the pressure before the machine to obtain a second difference; a determination submodule, used to determine the target value according to the level corresponding to the target desuperheater; a second calculation submodule, used to calculate the ratio between the target value and the second difference to obtain a target ratio; a third calculation submodule, used to calculate the difference between the boiler pressure and the target ratio to obtain the outlet steam pressure.

[0096] The device for detecting the outlet temperature of the desuperheater includes a processor and a memory. The first determination unit 701, the first calculation unit 702 and the second calculation unit 703 are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

[0097] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the accurate detection of the outlet temperature of the desuperheater can be achieved by adjusting the kernel parameters.

[0098] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0099] An embodiment of the present invention provides a computer-readable storage medium having a program stored thereon. When the program is executed by a processor, a method for detecting a desuperheater outlet temperature is implemented.

[0100] An embodiment of the present invention provides a processor, which is used to run a program, wherein the program executes a method for detecting a desuperheater outlet temperature when the program is running.

[0101] like Figure 8 As shown, an embodiment of the present invention provides an electronic device, the device includes a processor, a memory and a program stored in the memory and executable on the processor, and the processor implements the following steps when executing the program: determining a target desuperheater whose outlet temperature is to be detected; calculating based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located, to obtain the outlet steam enthalpy of the target desuperheater; calculating based on the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater.

[0102] Optionally, before obtaining the outlet steam enthalpy of the target desuperheater by calculation based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located, the method also includes: determining the number of desuperheaters in the boiler steam-water system where the target desuperheater is located; and determining the steam flow diversion coefficient based on the number of desuperheaters in the boiler steam-water system.

[0103] Optionally, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located, including: calculating the difference between the total steam flow value and the total amount of desuperheating water to obtain a first difference; obtaining the inlet steam enthalpy of the target desuperheater and obtaining the enthalpy of the desuperheating water; and obtaining the outlet steam enthalpy of the target desuperheater by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient.

[0104] Optionally, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient, including: obtaining a first value by calculation based on the steam flow diversion coefficient, the inlet steam enthalpy, the first difference, the enthalpy of the desuperheating water and the desuperheating water flow rate; obtaining a second value by calculation based on the steam flow diversion coefficient, the first difference and the desuperheating water flow rate; and obtaining the outlet steam enthalpy of the target desuperheater based on the ratio of the first value to the second value.

[0105] Optionally, obtaining the inlet steam enthalpy of the target desuperheater includes: obtaining the inlet steam temperature of the target desuperheater; obtaining the outlet steam pressure of the target desuperheater; and calculating according to the inlet steam temperature and the outlet steam pressure to obtain the inlet steam enthalpy.

[0106] Optionally, obtaining the outlet steam pressure of the target desuperheater includes: obtaining the drum pressure of the steam drum in the boiler steam-water system where the target desuperheater is located; obtaining the machine-front pressure in the boiler steam-water system where the target desuperheater is located; and calculating based on the drum pressure and the machine-front pressure to obtain the outlet steam pressure.

[0107] Optionally, calculating based on the drum pressure and the pressure before the machine to obtain the outlet steam pressure includes: calculating the difference between the drum pressure and the pressure before the machine to obtain a second difference; determining a target value based on the level corresponding to the target desuperheater; calculating the ratio between the target value and the second difference to obtain a target ratio; calculating the difference between the drum pressure and the target ratio to obtain the outlet steam pressure.

[0108] The devices in this article can be servers, PCs, PADs, mobile phones, etc.

[0109] The present application also provides a computer program product, which, when executed on a data processing device, is suitable for executing a program that initializes the following method steps: determining a target desuperheater whose outlet temperature is to be detected; calculating based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located, to obtain the outlet steam enthalpy of the target desuperheater; calculating based on the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater.

[0110] Optionally, before obtaining the outlet steam enthalpy of the target desuperheater by calculation based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located, the method also includes: determining the number of desuperheaters in the boiler steam-water system where the target desuperheater is located; and determining the steam flow diversion coefficient based on the number of desuperheaters in the boiler steam-water system.

[0111] Optionally, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow value and the total amount of desuperheating water in the boiler steam-water system where the target desuperheater is located, including: calculating the difference between the total steam flow value and the total amount of desuperheating water to obtain a first difference; obtaining the inlet steam enthalpy of the target desuperheater and obtaining the enthalpy of the desuperheating water; and obtaining the outlet steam enthalpy of the target desuperheater by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient.

[0112] Optionally, the outlet steam enthalpy of the target desuperheater is obtained by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow diversion coefficient, including: obtaining a first value by calculation based on the steam flow diversion coefficient, the inlet steam enthalpy, the first difference, the enthalpy of the desuperheating water and the desuperheating water flow rate; obtaining a second value by calculation based on the steam flow diversion coefficient, the first difference and the desuperheating water flow rate; and obtaining the outlet steam enthalpy of the target desuperheater based on the ratio of the first value to the second value.

[0113] Optionally, obtaining the inlet steam enthalpy of the target desuperheater includes: obtaining the inlet steam temperature of the target desuperheater; obtaining the outlet steam pressure of the target desuperheater; and calculating according to the inlet steam temperature and the outlet steam pressure to obtain the inlet steam enthalpy.

[0114] Optionally, obtaining the outlet steam pressure of the target desuperheater includes: obtaining the drum pressure of the steam drum in the boiler steam-water system where the target desuperheater is located; obtaining the machine-front pressure in the boiler steam-water system where the target desuperheater is located; and calculating based on the drum pressure and the machine-front pressure to obtain the outlet steam pressure.

[0115] Optionally, calculating based on the drum pressure and the pressure before the machine to obtain the outlet steam pressure includes: calculating the difference between the drum pressure and the pressure before the machine to obtain a second difference; determining a target value based on the level corresponding to the target desuperheater; calculating the ratio between the target value and the second difference to obtain a target ratio; calculating the difference between the drum pressure and the target ratio to obtain the outlet steam pressure.

[0116] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0117] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0118] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0119] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0120] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0121] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0122] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0123] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0124] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0125] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for detecting the outlet temperature of a desuperheater, characterized in that: include: Determine a target desuperheater for the outlet temperature to be detected; Calculate the outlet steam enthalpy of the target desuperheater according to the desuperheating water flow rate of the target desuperheater, the steam flow split coefficient, the total steam flow rate value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located; The outlet temperature value of the target desuperheater is obtained by calculating according to the outlet steam enthalpy.

2. The method according to claim 1, characterized in that Before calculating the outlet steam enthalpy of the target desuperheater based on the desuperheating water flow rate of the target desuperheater, the steam flow split coefficient, the total steam flow rate value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located, the method further includes: Determining the number of desuperheaters in the boiler steam-water system where the target desuperheater is located; The steam flow split coefficient is determined according to the number of desuperheaters in the boiler steam-water system.

3. The method according to claim 1, characterized in that The outlet steam enthalpy of the target desuperheater is obtained by calculating according to the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow rate value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located, including: Calculating the difference between the total steam flow value and the total desuperheating water value to obtain a first difference; Obtaining the inlet steam enthalpy of the target desuperheater and the enthalpy of desuperheating water; The outlet steam enthalpy of the target desuperheater is obtained by calculation based on the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow split coefficient.

4. The method according to claim 3, characterized in that The outlet steam enthalpy of the target desuperheater is obtained by calculating according to the first difference, the inlet steam enthalpy, the enthalpy of the desuperheating water, the desuperheating water flow rate and the steam flow split coefficient, including: Calculating according to the steam flow split coefficient, the inlet steam enthalpy, the first difference, the enthalpy of the desuperheating water and the desuperheating water flow to obtain a first value; Calculating according to the steam flow split coefficient, the first difference and the desuperheating water flow to obtain a second value; The outlet steam enthalpy of the target desuperheater is obtained according to the ratio of the first value to the second value.

5. The method according to claim 3, characterized in that: Obtaining the inlet steam enthalpy of the target desuperheater includes: Obtaining an inlet steam temperature of the target desuperheater; Obtaining the outlet steam pressure of the target desuperheater; The inlet steam enthalpy is obtained by calculation based on the inlet steam temperature and the outlet steam pressure.

6. The method according to claim 5, characterized in that Obtaining the outlet steam pressure of the target desuperheater includes: Obtaining the drum pressure of the steam drum in the steam-water system of the boiler where the target desuperheater is located; Obtaining the inlet pressure of the boiler steam-water system where the target desuperheater is located; The outlet steam pressure is obtained by calculating according to the steam drum pressure and the pressure in front of the machine.

7. The method according to claim 6, characterized in that The outlet steam pressure is obtained by calculating according to the drum pressure and the steam inlet pressure, including: Calculating the difference between the drum pressure and the steam generator pressure to obtain a second difference; Determining a target value according to the level corresponding to the target desuperheater; Calculating a ratio between the target value and the second difference to obtain a target ratio; The difference between the drum pressure and the target ratio is calculated to obtain the outlet steam pressure.

8. A device for detecting the outlet temperature of a desuperheater, characterized in that: include: A first determining unit, used to determine a target desuperheater for a to-be-detected outlet temperature; A first calculation unit is used to calculate the outlet steam enthalpy of the target desuperheater according to the desuperheating water flow rate of the target desuperheater, the steam flow diversion coefficient, the total steam flow rate value and the total desuperheating water value in the boiler steam-water system where the target desuperheater is located; The second calculation unit is used to calculate according to the outlet steam enthalpy to obtain the outlet temperature value of the target desuperheater.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the storage medium is controlled to execute the method for detecting the outlet temperature of the desuperheater according to any one of claims 1 to 7 on the device.

10. An electronic device, characterized in that: It comprises one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the method for detecting the outlet temperature of the desuperheater as described in any one of claims 1 to 7.

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