Steam system fault rapid response method, device, equipment and storage medium

Abstract

The present application relates to a method, device, equipment and storage medium for rapid response to a steam system fault, which is applied in the field of steam heating, wherein the method comprises: obtaining a first pressure signal, the first pressure signal comprising first pressure values ​​corresponding to different positions on a main steam main pipe; obtaining a second pressure signal, the second pressure signal comprising second pressure values ​​corresponding to different positions on a medium-pressure extraction main pipe; comparing a number of first pressure values ​​with a first standard value, and recording the number of first pressure values ​​of the first pressure values ​​exceeding the first standard value; comparing a number of second pressure values ​​with a second standard value, and recording the number of second pressure values ​​of the second pressure values ​​not greater than the second standard value; if the first pressure number is not less than a preset standard number value, and the second pressure number is not less than a preset standard number value, sending a valve opening instruction to a receiving end of the valve to control the valve to open to a preset valve opening standard value. The present application has the technical effect of improving the response speed of the steam system to emergencies.

Description

Technical Field

[0001] The present application relates to the technical field of steam heating, and in particular to a method, device, equipment and storage medium for rapid response to steam system failures. Background Art

[0002] In the industrial field, water circulation heating and steam heating are the two main heating methods used for heating. Steam heating has the advantages of high transmission efficiency and quietness. In the steam heating network, steam enters the main steam main pipe from the boiler, and part of the steam in the main steam main pipe flows into the medium-pressure extraction main pipe through the steam turbine, and the other part of the steam flows into the medium-pressure extraction main pipe through the medium-pressure temperature and pressure reducer.

[0003] In the related art, for the control of the heating network, the outlet pressure of the steam heating pipeline is selected as the adjusted parameter, which is a single-loop PID adjustment, and the valve opening is mainly adjusted according to the deviation between the outlet pressure and the set value.

[0004] In the process of implementing the present application, the inventors found that there are at least the following problems in this technology: in an emergency, the PID system waits until the outlet pressure of the heating pipe changes before adjusting the valve, which greatly reduces the real-time performance. Summary of the invention

[0005] In order to improve the response speed of a steam system to emergencies, the present application provides a method, device, equipment and storage medium for rapid response to steam system faults.

[0006] In a first aspect, the present application provides a method for rapid response to a steam system fault, which adopts the following technical solution: the method comprises:

[0007] Acquire a first pressure signal of a main steam main pipe, wherein the first pressure signal includes first pressure values ​​corresponding to different positions on the main steam main pipe;

[0008] Acquire a second pressure signal of the medium-pressure steam extraction main pipe, wherein the second pressure signal includes second pressure values ​​corresponding to different positions on the medium-pressure steam extraction main pipe;

[0009] Compare the first pressure values ​​with a preset first standard value, and record the number of first pressure values ​​exceeding the first standard value;

[0010] Compare the plurality of second pressure values ​​with a preset second standard value, and record the number of second pressure values ​​that are not greater than the second standard value;

[0011] If the first pressure number is not less than the preset standard number value, and the second pressure number is not less than the preset standard number value, a valve opening instruction is sent to the receiving end of the valve to control the valve to open to the preset valve opening standard value.

[0012] Through the above technical scheme, when a failure occurs in the steam heating system, the first pressure value in the main steam main pipe and the second pressure value in the medium-pressure extraction steam main pipe will fluctuate violently, and the violent fluctuations in the first pressure value and the second pressure value may cause unplanned shutdown of the downstream device of the steam heating pipeline, causing economic losses. When the first pressure value in the main steam main pipe and the second pressure value in the medium-pressure extraction steam main pipe change, the valve opening is directly adjusted to the preset valve opening standard value, which helps to improve the real-time response of the steam heating system to emergencies and reduce the economic losses caused by the steam heating system waiting for the outlet pressure value of the steam heating pipeline to change before adjusting.

[0013] In a specific possible implementation scheme, an operation status signal of the steam turbine unit is obtained, wherein the operation status signal includes a working state and a shutdown state;

[0014] If the operation status signal is a shutdown state, a valve opening instruction is sent to a receiving end of the valve to control the valve to open to a preset valve opening standard value.

[0015] Through the above technical solution, when a fault occurs in the steam turbine, the second pressure value in the medium-pressure steam extraction mother pipe may change. Therefore, by directly obtaining the operating status signal of the steam turbine, it is determined whether the steam turbine is in a normal working state. When the operating status signal of the steam turbine is a shutdown state, the valve opening is adjusted to a preset valve opening standard value, which helps to regulate the valve opening before the second pressure value in the medium-pressure steam extraction mother pipe changes, thereby further improving the real-time response of the steam heating system to emergencies.

[0016] In a specific possible implementation scheme, when the valve is controlled to open according to a preset valve opening standard value, timing is started and a first timing time value is generated;

[0017] Acquire an actual opening signal of the valve, wherein the actual opening signal includes an actual opening value of the valve;

[0018] If the actual opening value does not reach the valve opening standard value and the first timing time value reaches the preset first standard time value;

[0019] Obtain a second pressure value of the medium-pressure steam extraction main pipe;

[0020] Subtracting a preset adjustment setting value from the second pressure value to obtain a fine-tuning difference;

[0021] If the fine-tuning difference is greater than zero, the valve is controlled to close according to the fine-tuning difference;

[0022] If the fine-tuning difference is less than zero, the valve is controlled to open according to the fine-tuning difference.

[0023] Through the above technical scheme, when the valve has not been adjusted to the position corresponding to the preset valve opening standard value, and the first timing time value has reached the preset first standard time value, and the second pressure value in the medium-pressure steam extraction main pipe has not yet reached the preset adjustment setting value, by comparing the second pressure value of the medium-pressure steam extraction main pipe with the adjustment setting value, the opening of the valve is regulated according to the difference between the second pressure value and the adjustment setting value, so that the second pressure value of the medium-pressure steam main pipe reaches the adjustment setting value, which helps to make the steam in the medium-pressure steam extraction main pipe meet the gas supply demand of the downstream device of the steam heating pipeline.

[0024] In a specific implementation scheme, when the valve is controlled to open according to a preset valve opening standard value, timing is started and a second timing time value is generated;

[0025] Comparing the second timing time value with a preset second standard time value;

[0026] If the second timing time value is equal to the second standard time value, then obtaining the actual opening value of the valve;

[0027] Calculating the opening difference between the actual opening value and the output value of the valve opening instruction;

[0028] If the opening difference exceeds a preset standard opening difference, the control mode of the valve is switched to a manual mode.

[0029] Through the above technical solution, when the second timing time value reaches the second standard time value, but the difference between the actual opening value of the valve and the output value in the valve opening instruction sent by the steam heating system to the valve is still too large, at this time, the steam heating system controlling the valve opening can no longer cope with the sudden situation of the steam heating pipeline. The steam heating system switches the valve control mode to manual, and the subsequent valve opening adjustment is completed by the staff.

[0030] In a specific implementation scheme, the outlet pressure value of the medium-pressure temperature and pressure reduction device is compared with the adjustment set value;

[0031] If the difference between the outlet pressure value of the medium-pressure temperature and pressure reducing device and the adjustment set value is outside the preset difference range;

[0032] Then a second candidate pressure value is obtained, where the second candidate pressure value is the outlet pressure value of the medium-pressure temperature and pressure reduction device and is different from the outlet pressure value of the medium-pressure temperature and pressure reduction device in the second pressure signal.

[0033] Through the above technical scheme, when the difference between the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device in the second pressure value and the adjustment set value is outside the preset difference range, a second alternative pressure value is obtained, and the second alternative pressure value is also the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device, but the second alternative pressure value is different from the second pressure value in the second pressure signal first obtained by the steam heating system. This helps the steam heating system to further verify whether the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device is actually abnormal by changing the detection position and obtaining a new outlet pressure value of the medium-pressure temperature reducing and pressure reducing device when an abnormality is detected in the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device.

[0034] In a specific possible implementation scheme, if the difference between the second alternative pressure value and the adjustment set value exceeds a preset difference range;

[0035] Then the control mode of the valve is changed to manual control mode.

[0036] Through the above technical solution, when the difference between the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device in the second pressure value and the adjustment set value exceeds the preset difference range, the control mode of the valve is modified to the manual control mode. This helps to manually adjust the valve opening to deal with emergencies when the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device is obviously abnormal, thereby improving the safety of the steam heating system.

[0037] In a second aspect, the present application provides a steam system fault rapid response device, which adopts the following technical solution: the device comprises:

[0038] A first pressure signal acquisition module, used to acquire a first pressure signal of a main steam main pipe, wherein the first pressure signal includes first pressure values ​​corresponding to different positions on the main steam main pipe;

[0039] A second pressure signal acquisition module, used to acquire a second pressure signal of the medium-pressure steam extraction mother pipe, wherein the second pressure signal includes second pressure values ​​corresponding to different positions on the medium-pressure steam extraction mother pipe;

[0040] A first pressure value comparison module, used for comparing a plurality of the first pressure values ​​with a preset first standard value, and recording the number of first pressure values ​​exceeding the first standard value;

[0041] A second pressure value comparison module, used for comparing a plurality of second pressure values ​​with a preset second standard value, and recording the number of second pressure values ​​that are not greater than the second standard value;

[0042] The valve opening control module is used to send a valve opening instruction to the receiving end of the valve to control the valve to open to the preset valve opening standard value if the first pressure number is not less than the preset standard number value and the second pressure number is not less than the preset standard number value.

[0043] Through the above technical scheme, the steam heating system obtains the first pressure value in the main steam main pipe through the first pressure signal module, obtains the second pressure value in the medium-pressure extraction steam main pipe through the second pressure signal acquisition module, and compares the first pressure value with the first standard value using the first pressure value comparison module and the second pressure value comparison module respectively, and records the number of first pressure values ​​that exceed the first standard value, compares the second pressure value with the second standard value, and records the number of second pressure values ​​that are not greater than the second standard value. When the first pressure number and the second pressure number are not less than the preset standard number value, the valve opening control module controls the valve to open to a preset value according to the preset valve opening standard value, so that when the first pressure value in the main steam main pipe and the second pressure value in the medium-pressure extraction steam main pipe of the steam heating system change, the valve opening can be directly adjusted to the preset valve opening standard value, thereby improving the real-time response of the steam heating system to emergencies.

[0044] In a third aspect, the present application provides a computer device, which adopts the following technical solution: it includes a memory and a processor, and the memory stores a computer program that can be loaded by the processor and executed by any of the above-mentioned steam system fault rapid response methods.

[0045] In a fourth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solution: storing a computer program that can be loaded by a processor and execute any of the above-mentioned steam system fault rapid response methods.

[0046] In summary, the present application includes at least one of the following beneficial technical effects:

[0047] 1. When a failure occurs in the steam heating system, the first pressure value in the main steam main pipe and the second pressure value in the medium-pressure extraction steam main pipe will fluctuate violently, and the violent fluctuation of the first pressure value and the second pressure value may cause unplanned shutdown of the downstream device of the steam heating pipeline, resulting in economic losses. When the first pressure value in the main steam main pipe and the second pressure value in the medium-pressure extraction steam main pipe change, directly adjusting the valve opening to the preset valve opening standard value helps to improve the real-time response of the steam heating system to emergencies, and reduces the economic losses caused by the steam heating system waiting for the outlet pressure value of the steam heating pipeline to change before adjusting and controlling;

[0048] 2. When a fault occurs in the steam turbine, the second pressure value in the medium-pressure steam extraction mother pipe may change. Therefore, by directly obtaining the operating status signal of the steam turbine, it is determined whether the steam turbine is in a normal working state. When the operating status signal of the steam turbine is in a shutdown state, the valve opening is adjusted to the preset valve opening standard value. This helps to regulate the valve opening before the second pressure value in the medium-pressure steam extraction mother pipe changes, further improving the real-time response of the steam heating system to emergencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a flow chart of a method for rapid response to steam system failure in an embodiment of the present application.

[0050] Figure 2 It is an overall schematic diagram of the steam heating pipeline in the embodiment of the present application.

[0051] Figure 3 It is a structural block diagram of a rapid response device for steam system failure in an embodiment of the present application.

[0052] Figure 4 It is a structural block diagram of a rapid response device for steam system failure in another embodiment of the present application.

[0053] Figure numerals: 301, first pressure signal acquisition module; 302, second pressure signal acquisition module; 303, first pressure value comparison module; 304, second pressure value comparison module; 305, valve opening control module; 306, operation status signal acquisition module. DETAILED DESCRIPTION

[0054] The following is combined with Figure 1-4 This application is described in further detail.

[0055] The present application embodiment discloses a method for rapid response to steam system failure, such as Figure 1As shown, the method is applied to a steam heating system, and the corresponding instructions of the method are pre-stored in a control center of the steam heating system. There is data transmission between the steam heating system and external equipment, and the external equipment includes an input device and an output device, the input device can be a keyboard and a mouse, and the output device can be a display screen; the steam heating system includes a steam heating pipeline for transporting steam, the steam heating pipeline includes a main steam main pipe and a medium-pressure extraction main pipe, the medium-pressure extraction main pipe includes a first branch pipe where a steam turbine is located, a second branch pipe where a medium-pressure temperature and pressure reducer is located, and a medium-pressure gas supply main pipe for transporting steam to a downstream device of the steam heating pipeline, and the downstream device of the steam heating pipeline can be an oil refinery and a fertilizer plant; a valve for controlling the steam volume of the second branch pipe is arranged between the medium-pressure temperature and pressure reducer and the medium-pressure gas supply main pipe, the control mode of the valve includes an automatic control mode and a manual control mode, and the valve includes a receiving end for receiving a valve opening control instruction.

[0056] like Figure 2 As shown, the method comprises the following steps:

[0057] S10, obtaining a first pressure signal of a main steam main pipe, where the first pressure signal includes first pressure values ​​corresponding to different positions on the main steam main pipe.

[0058] Specifically, obtaining the first pressure signal of the main steam main pipe is to select several different positions on the main steam main pipe, obtain the pressure values ​​corresponding to the several different positions, and the pressure values ​​are also the first pressure values; wherein the main steam main pipe is directly connected to the boiler, and the boiler heats water at a certain temperature to high-temperature and high-pressure steam and transports it to the main steam main pipe; for example: select five different positions on the main steam main pipe, obtain the pressure values ​​corresponding to the five different positions, and the five pressure values ​​are the first pressure values.

[0059] S20, obtaining a second pressure signal of the medium-pressure steam extraction mother pipe, where the second pressure signal includes second pressure values ​​corresponding to different positions on the medium-pressure steam extraction mother pipe.

[0060] Specifically, obtaining the second pressure signal of the medium-pressure steam extraction mother pipe is to select several positions on the medium-pressure steam extraction mother pipe respectively, and obtain the pressure values ​​corresponding to the several positions, which are also the second pressure values; wherein the medium-pressure steam extraction mother pipe includes the first branch pipe where the steam turbine is located, the second branch pipe where the medium-pressure temperature and pressure reducer is located, and the medium-pressure air supply mother pipe; for example: one of the second pressure values ​​in the second pressure signal in the present embodiment can be the pressure value of the steam turbine extraction port, three second pressure values ​​in the second pressure signal can be the outlet pressure values ​​of the medium-pressure temperature and pressure reducer, and one of the second pressure values ​​in the second pressure signal can be the pressure value of the medium-pressure air supply mother pipe.

[0061] S30, comparing the plurality of first pressure values ​​with a preset first standard value, and recording the number of first pressure values ​​exceeding the first standard value.

[0062] Specifically, the five first pressure values ​​obtained are compared with the first standard value respectively, and the number of first pressure values ​​not less than the first standard value is recorded, which is also the first pressure number; for example: in this embodiment, the first standard value may be 9.6MPa.

[0063] S40, comparing a plurality of second pressure values ​​with a preset second standard value, and recording the number of second pressure values ​​that are not greater than the second standard value.

[0064] Specifically, the five obtained second pressure values ​​are compared with the second standard value respectively, and the number of second pressure values ​​not greater than the second standard value is recorded, which is also the second pressure number; for example: in this embodiment, the second pressure value may be 3.6 MPa.

[0065] S50, if the first pressure number is not less than the preset standard number value, and the second pressure number is not less than the preset standard number value, a valve opening instruction is sent to the receiving end of the valve to control the valve to open to the preset valve opening standard value.

[0066] Specifically, when both the first pressure number and the second pressure number reach the preset standard quantity value, the steam heating system controls the valve at the outlet of the medium-pressure desuperheater to open to a preset position by sending a valve opening instruction to the receiving end of the valve, and the steam heating system sends an alarm instruction to the display while sending the valve opening instruction; it is worth mentioning that the above-mentioned valve opening instruction is used to open the valve to a preset valve opening standard value. In this embodiment, the display displays the process screen of the steam heating system in real time. After receiving the alarm signal, the display emits an audible and visual alarm on the process screen; wherein, the preset valve opening standard value is obtained by the staff according to the working conditions and can be displayed on the process screen of the display, but only the staff with modification authority can set the valve opening standard value; it should be noted that the standard quantity value in this embodiment can be three; for example: when the number of first pressure values ​​not less than 9.6MPa reaches three or more, and the number of second pressure values ​​not greater than 3.6MPa also reaches three or more, the steam heating system opens the valve to the position corresponding to the valve opening standard value according to the preset valve opening standard value. By monitoring the first pressure value on the main steam mother pipe and the second pressure value on the medium-pressure extraction steam mother pipe, when the first pressure value and the second pressure value change drastically, the steam heating system can directly control the valve opening and open the valve opening to a preset valve opening standard value, which helps to improve the timeliness of the steam heating system's response to emergencies and reduces the economic losses caused by the unplanned shutdown of downstream devices in the steam heating pipeline due to the steam heating system waiting for the outlet pressure value of the steam heating pipeline to change before adjusting.

[0067] In one embodiment, in order to further improve the timeliness of the steam heating system's response to emergencies, the method for rapid response to steam system failures may further include the following steps:

[0068] The operation status signal of the steam turbine unit is obtained; wherein the operation status signal includes the working status and the shutdown status; if the operation status signal of the steam turbine unit is the shutdown status, the valve is controlled to open to the preset value according to the preset valve opening standard value. Therefore, once the steam turbine unit fails, the pressure value of the steam turbine extraction port drops sharply, and then the pressure value in the medium-pressure gas supply main pipe also changes accordingly. When the steam turbine unit fails, the steam heating system directly controls the valve so that the valve opening is opened to the position corresponding to the valve opening standard value, which helps to adjust the valve opening before the second pressure value in the medium-pressure extraction main pipe changes, thereby improving the timeliness of the steam heating system's response to emergencies.

[0069] In one embodiment, considering that after the valve opening is controlled according to the valve opening standard value, there is a situation where the second pressure value in the medium-pressure steam extraction mother pipe still does not reach the preset adjustment setting value. It should be noted that the second pressure value of the medium-pressure steam extraction mother pipe mentioned here is the outlet pressure value of the medium-pressure temperature and pressure reducer. After the valve is controlled to open to the preset valve opening standard value, the following steps can also be performed:

[0070] At the beginning of the action of the steam heating system sending the valve opening instruction with the preset valve opening standard value as the output value to the receiving end of the valve, that is, when the first pressure number and the second pressure number both reach the preset standard quantity values, or when the operating status signal of the steam turbine unit is in the shutdown state condition, the steam supply system starts timing and generates a first timing time value accordingly, and obtains the actual opening value of the valve in real time. When the actual opening value of the valve does not reach the valve opening standard value and the first timing time value reaches the preset first standard time value, the steam heating system obtains the outlet pressure value of the medium-pressure temperature and pressure reducer. The obtained outlet pressure value of the medium-pressure temperature and pressure reducer is compared with the adjustment set value. If the outlet pressure value of the medium-pressure temperature and pressure reducer is less than the adjustment set value, the load is increased on the standard valve opening to increase the valve opening; if the outlet pressure of the medium-pressure temperature and pressure reducer is greater than the adjustment set value, the load is reduced on the standard valve opening to reduce the valve opening; it should be noted that in this embodiment, the maximum value of the first standard time is 35 seconds, that is, the steam heating system controls the valve opening according to the valve opening standard value. It takes only 35 seconds at most. Even if the valve fails to open to the position corresponding to the valve opening standard value at the 35th second, it will not Then the valve is controlled according to the preset valve opening standard value. The above-mentioned increase or decrease of load on the valve standard opening is that the steam heating system directly modifies the preset valve opening standard value, takes the modified value as the output value of the valve opening instruction, and sends the valve opening instruction to the receiving end of the valve. It should be noted that the value of the valve opening standard value itself will not change; for example: the pressure value of the outlet of the medium-pressure desuperheater and pressure reducer is 3.9MPa, the valve opening standard value is 30%, and the adjustment setting value is 3.8MPa, and the actual opening value of the valve is 25% at this time, the medium-pressure When the pressure value at the outlet of the temperature reducer is greater than the adjustment set value, the steam heating system will adjust the output value of the valve opening instruction to less than 25%, and adjust the actual opening of the valve according to the opening value, thereby reducing the pressure value in the second branch pipe where the medium-pressure temperature reducer is located; by comparing the outlet pressure of the medium reducer with the adjustment set value in real time, the valve opening is fine-tuned so that the outlet pressure of the medium reducer can be equal to the adjustment set value, which helps to ensure that the steam pressure value in the medium-pressure gas supply mother pipe can meet the gas supply pressure requirements of the downstream devices of the steam heating pipeline, thereby enabling the downstream devices of the steam heating pipeline to operate normally.

[0071] In one embodiment, considering that the steam heating system fine-tunes the valve opening after controlling the valve to open to a preset valve opening standard value, the valve may fail, making it impossible for the steam heating system to adjust the valve opening, after obtaining the actual valve opening signal, the following steps may be performed:

[0072] At the beginning of the action of the steam heating system sending the valve opening instruction with the preset valve opening standard value as the output value to the receiving end of the valve, that is, when the first pressure number and the second pressure number both reach the preset standard quantity values, or when the operating status signal of the turbine unit is in the shutdown state condition, the steam supply system starts timing and generates a second timing time value. It is worth mentioning that, from the above, it can be seen that the process of the steam heating system controlling the valve to open to the preset valve opening standard value takes at most 35 seconds. At the 35th second, although the actual opening value of the valve does not reach the preset valve opening standard value, the steam heating system will also fine-tune the valve according to the difference between the outlet pressure value of the medium-pressure desuperheater and the adjustment set value. If before the 35th second, the actual opening value of the valve reaches the valve opening standard value, then the steam heating system will also fine-tune the valve according to the difference between the outlet pressure value of the medium-pressure desuperheater and the adjustment set value.

[0073] When the second timing time value reaches the second standard time value, the actual opening value of the valve is obtained, and the difference between the actual opening value of the valve and the output value of the steam heating system for controlling the valve opening is calculated. If the difference between the actual opening value of the valve and the output value of the valve opening of the steam heating system exceeds the preset valve opening difference, the control mode of the valve is switched to manual, and the actual opening of the valve is directly controlled by the staff; if the difference between the actual opening value of the valve and the output value of the valve opening of the steam heating system is less than the preset valve opening difference, the actual opening of the valve continues to be controlled by the steam heating system; wherein, in this embodiment, the second time standard value is at most 60 seconds, that is, the process of adjusting the valve opening by the steam heating system takes at most 60 seconds, and the above process includes the time spent by the steam heating system to control the valve opening according to the preset valve opening standard value.

[0074] The steam heating system sets a second standard time value. When the second timing time value reaches the second standard time value, but the difference between the actual opening value of the valve and the output value in the valve opening instruction sent by the steam heating system to the valve is still too large, the steam heating system controlling the valve opening can no longer cope with the emergency of the steam heating pipeline. The steam heating system switches the valve control mode to manual, and the subsequent valve opening adjustment is completed by the staff, which helps to improve the steam heating system's ability to respond to emergencies.

[0075] In one embodiment, considering that when the steam heating system fine-tunes the valve, when the first pressure number and the second pressure number are triggered to the preset standard quantity value again, the steam heating system once again adjusts the valve opening to the valve opening standard value, which will cause huge fluctuations in external steam heating, which is absolutely not allowed for safe production. After controlling the valve to open to the preset valve opening standard value, the following steps can also be performed:

[0076] The steam heating system no longer obtains the first pressure signal and the operating status signal of the steam turbine unit, that is, the first pressure signal and the steam turbine unit signal are locked until the steam heating system adjusts the valve opening to a suitable position so that the second pressure value returns to the adjustment setting value, and the steam heating system will resume obtaining the first pressure signal and the operating status signal. It is worth mentioning that the steam heating system can resume obtaining the first pressure signal and the operating status information because the staff releases the lock after the second pressure value returns to the adjustment setting value. In other words, once the first pressure number and the second pressure number trigger to the preset standard quantity value or the operating status information of the steam turbine unit is displayed as shutdown information, the steam heating system will lock the first pressure signal and the steam turbine unit signal until the staff unlocks the first pressure signal and the steam turbine unit signal. Therefore, when the steam heating system adjusts the actual opening corresponding to the valve, it no longer receives the first pressure signal and the operating status signal to ensure that in an emergency, the valve opening is adjusted to the preset valve opening standard value. This action will only occur once.

[0077] It is worth mentioning that in this embodiment, the steam heating system realizes the above functions by setting up interlocks, and only when the first pressure number and the second pressure number do not reach the standard quantity value or the operating status signal of the steam turbine unit is in working state, the process screen on the display will display the interlock switch button, otherwise the interlock switch button will be hidden to reduce the possibility of staff misoperation. Therefore, during the interlock action, the first pressure signal of the main steam main pipe, the second pressure signal of the medium-pressure extraction main pipe and the operating status signal of the steam turbine unit are no longer obtained, which helps to reduce the possibility that the first pressure value and the second pressure value change around the first standard value and the second standard value respectively, or the operating status signal of the steam turbine unit changes multiple times in a short period of time, so that the steam heating system needs to re-fine-tune the valve opening, thereby helping to improve the applicability of the steam heating system.

[0078] In one embodiment, in order to further verify the abnormality of the outlet pressure value of the medium-pressure desuperheater and pressure reducer, after obtaining the second pressure signal of the medium-pressure steam extraction mother pipe, the following steps may be performed:

[0079] The outlet pressure value of the medium-pressure temperature reducing and pressure reducing device in the second pressure signal is compared with the adjustment set value. When the difference between the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device and the adjustment set value is outside the preset difference range, it means that the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device is a bad value, and the steam heating system obtains a second alternative pressure value; wherein, the second alternative pressure value is still the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device, but the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device is different from the outlet pressure value of the medium-pressure temperature reducing and pressure reducing device in the second pressure signal, so that the steam heating system re-obtains an outlet pressure value of the medium-pressure temperature reducing and pressure reducing device that has not been detected, and the second alternative pressure value and other second pressure values ​​constitute a new second pressure signal.

[0080] For example: Since the outlet pressure signal of the medium pressure reducer is in the range of 0 to 6MPa, if the outlet pressure value of the medium-pressure temperature and pressure reducer is 1.5MPa at this time, since the normal outlet pressure value of the medium-pressure temperature and pressure reducer is about 3.8MPa, the outlet pressure value of the medium-pressure temperature and pressure reducer is an abnormal value. Therefore, obtaining a new outlet pressure value of the medium-pressure temperature and pressure reducer helps to verify whether the outlet pressure value of the medium-pressure temperature and pressure reducer is actually abnormal.

[0081] In one embodiment, in order to improve the safety of the steam heating system, after obtaining the second candidate pressure value, the following steps may be performed:

[0082] If the outlet pressure values ​​of the medium-pressure temperature and pressure reducer are all beyond the instrument input range, and the outlet valve position feedback value of the medium-pressure temperature and pressure reducer exceeds the instrument input range, the steam supply system changes the valve control mode to manual control mode; wherein, the manual control mode is that the staff transmits data to the steam heating system through the input device, so that the steam heating system controls the valve opening according to the data obtained from the input device; for example: if the outlet pressure values ​​of the medium-pressure temperature and pressure reducer are all bad values, at this time, switching the valve control mode to manual control mode will help improve the safety of the steam heating system.

[0083] Figure 2 FIG. 1 is a flow chart of a method for rapid response to a steam system failure in one embodiment. It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but the steps are not necessarily executed in the order indicated by the arrows; unless otherwise specified in this document, there is no strict order restriction for the execution of the steps, and the steps may be executed in other orders; and Figure 1At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0084] Based on the above method, an embodiment of the present application also discloses a steam system fault rapid response device.

[0085] like Figure 3 As shown, the device is applied to a steam heating system, which includes a branch pipe connected between a main steam main pipe and a medium-pressure extraction steam main pipe, and a valve for controlling the steam volume of the branch pipe is provided on the branch pipe. The device includes the following modules:

[0086] A first pressure signal acquisition module 301 is used to acquire a first pressure signal of a main steam main pipe, where the first pressure signal includes first pressure values ​​corresponding to different positions on the main steam main pipe;

[0087] A second pressure signal acquisition module 302 is used to acquire a second pressure signal of the medium-pressure steam extraction mother pipe, wherein the second pressure signal includes second pressure values ​​corresponding to different positions on the medium-pressure steam extraction mother pipe;

[0088] A first pressure value comparison module 303, used to compare a plurality of first pressure values ​​with a preset first standard value, and record the number of first pressure values ​​exceeding the first standard value;

[0089] A second pressure value comparison module 304 is used to compare a plurality of second pressure values ​​with a preset second standard value, and record the number of second pressure values ​​that are not greater than the second standard value;

[0090] The valve opening control module 305 is used to send a valve opening instruction to the receiving end of the valve to control the valve to open to the preset valve opening standard value if the first pressure number is not less than the preset standard number value and the second pressure number is not less than the preset standard number value.

[0091] In one embodiment, Figure 4 As shown, the device further includes an operation status signal acquisition module 306, which is used to acquire an operation status signal of the steam turbine unit, and the operation status signal includes a working state and a shutdown state;

[0092] If the operating status signal is a shutdown state, a valve opening instruction is sent to a receiving end of the valve to control the valve to open to a preset valve opening standard value.

[0093] In one embodiment, the valve opening control module 305 is further used to start timing and generate a first timing time value when controlling the valve to open according to a preset valve opening standard value;

[0094] Acquire an actual opening signal of the valve, where the actual opening signal includes an actual opening value of the valve;

[0095] If the actual opening value does not reach the valve opening standard value and the first timing time value reaches the preset first standard time value;

[0096] Obtain a second pressure value of the medium-pressure steam extraction main pipe;

[0097] Subtract a preset adjustment setting value from the second pressure value to obtain a fine-tuning difference;

[0098] If the fine-tuning difference is greater than zero, the valve is closed according to the fine-tuning difference;

[0099] If the fine-tuning difference is less than zero, the valve is opened according to the fine-tuning difference control.

[0100] In one embodiment, the valve opening control module 305 is further used to start timing and generate a second timing time value when controlling the valve to open according to a preset valve opening standard value;

[0101] Comparing the second timing time value with a preset second standard time value;

[0102] If the second timing time value is equal to the second standard time value, then obtaining the actual opening value of the valve;

[0103] Calculate the opening difference between the actual opening value and the output value of the valve opening instruction;

[0104] If the opening difference exceeds the preset standard opening difference, the control mode of the valve is switched to manual mode.

[0105] In one embodiment, the second pressure value includes the outlet pressure value of the medium-pressure temperature and pressure reducing device, and the second pressure signal acquisition module 302 is further used to compare the outlet pressure value of the medium-pressure temperature and pressure reducing device with the adjustment set value;

[0106] If the difference between the outlet pressure value of the medium-pressure temperature and pressure reducer and the adjustment set value is outside the preset difference range;

[0107] Then a second candidate pressure value is obtained, which is the outlet pressure value of the medium-pressure temperature and pressure reduction device and is different from the outlet pressure value of the medium-pressure temperature and pressure reduction device in the second pressure signal.

[0108] In one embodiment, the control mode of the valve includes an automatic control mode and a manual control mode, and the second pressure signal acquisition module 302 is further used for if the difference between the second candidate pressure value and the adjustment setting value exceeds a preset difference range;

[0109] Then change the valve control mode to manual control mode.

[0110] The embodiment of the present application also discloses a computer device.

[0111] Specifically, the computer device includes a memory and a processor, and the memory stores a computer program that can be loaded by the processor and execute the above-mentioned steam system fault rapid response method.

[0112] The embodiment of the present application also discloses a computer-readable storage medium.

[0113] Specifically, the computer-readable storage medium stores a computer program that can be loaded by a processor and executes the above-mentioned steam system fault rapid response method. The computer-readable storage medium includes, for example: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0114] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A method for rapid response to steam system failure, characterized in that: The method is applied to a steam heating system, wherein the steam heating system comprises a branch pipe connected between a main steam main pipe and a medium-pressure extraction steam main pipe, wherein a valve for controlling the steam volume of the branch pipe is arranged on the branch pipe, and the valve comprises a receiving end for receiving a control instruction, and the method comprises: Acquire a first pressure signal of a main steam main pipe, wherein the first pressure signal includes first pressure values ​​corresponding to different positions on the main steam main pipe; Acquire a second pressure signal of the medium-pressure steam extraction mother pipe, wherein the second pressure signal includes second pressure values ​​corresponding to different positions on the medium-pressure steam extraction mother pipe; Compare the first pressure values ​​with a preset first standard value, and record the number of first pressure values ​​exceeding the first standard value; Compare the plurality of second pressure values ​​with a preset second standard value, and record the number of second pressure values ​​that are not greater than the second standard value; If the first pressure number is not less than the preset standard number value, and the second pressure number is not less than the preset standard number value, a valve opening instruction is sent to the receiving end of the valve to control the valve to open to the preset valve opening standard value; After the control valve is opened to a preset valve opening standard value, the method further includes: When the valve is controlled to open according to a preset valve opening standard value, timing is started and a first timing time value is generated; Acquire an actual opening signal of the valve, wherein the actual opening signal includes an actual opening value of the valve; If the actual opening value does not reach the valve opening standard value and the first timing time value reaches the preset first standard time value; Obtain a second pressure value of the medium-pressure steam extraction main pipe; Subtracting a preset adjustment setting value from the second pressure value to obtain a fine-tuning difference; If the fine-tuning difference is greater than zero, the valve is controlled to close according to the fine-tuning difference; If the fine-tuning difference is less than zero, the valve is controlled to open according to the fine-tuning difference; the valve control mode includes an automatic control mode and a manual control mode, the valve opening instruction includes an output value of the steam heating system for controlling the actual valve opening, and after the control valve is opened to a preset valve opening standard value, it also includes: When the valve is controlled to open according to a preset valve opening standard value, timing is started and a second timing time value is generated; Comparing the second timing time value with a preset second standard time value; If the second timing time value is equal to the second standard time value, then obtaining the actual opening value of the valve; Calculating the opening difference between the actual opening value and the output value of the valve opening instruction; If the opening difference exceeds a preset standard opening difference, the control mode of the valve is switched to a manual mode.

2. The method according to claim 1, wherein the second pressure value comprises the outlet pressure value of the medium-pressure desuperheater and pressure reducer, characterized in that: After obtaining the second pressure signal of the medium-pressure steam extraction mother pipe, the method further includes: Comparing the outlet pressure value of the medium-pressure temperature and pressure reducing device with the adjustment set value; If the difference between the outlet pressure value of the medium-pressure temperature and pressure reducing device and the adjustment set value is outside the preset difference range; Then a second candidate pressure value is obtained, where the second candidate pressure value is the outlet pressure value of the medium-pressure temperature and pressure reduction device and is different from the outlet pressure value of the medium-pressure temperature and pressure reduction device in the second pressure signal.

3. The method according to claim 2, characterized in that After obtaining the second candidate pressure value, the method further includes: comparing the second alternative pressure value with the adjustment set value; If the difference between the second alternative pressure value and the adjustment setting value exceeds a preset difference range; The control mode of the valve is switched to a manual control mode.

4. A quick response device for steam system failure, characterized in that: The device is applied to a steam heating system, the steam heating system comprises a branch pipe connected between a main steam main pipe and a medium-pressure extraction steam main pipe, the branch pipe is provided with a valve for controlling the steam volume of the branch pipe, and the device comprises: A first pressure signal acquisition module (301), used to acquire a first pressure signal of a main steam main pipe, wherein the first pressure signal comprises first pressure values ​​corresponding to different positions on the main steam main pipe; A second pressure signal acquisition module (302), used to acquire a second pressure signal of the medium-pressure steam extraction mother pipe, wherein the second pressure signal includes second pressure values ​​corresponding to different positions on the medium-pressure steam extraction mother pipe; A first pressure value comparison module (303), used for comparing a plurality of the first pressure values ​​with a preset first standard value, and recording the number of first pressure values ​​exceeding the first standard value; A second pressure value comparison module (304), used to compare a plurality of second pressure values ​​with a preset second standard value, and record the number of second pressure values ​​that are not greater than the second standard value; The valve opening control module (305) is used to send a valve opening instruction to a receiving end of the valve to control the valve to open to a preset valve opening standard value if the first pressure number is not less than a preset standard number value and the second pressure number is not less than a preset standard number value; and is also used to start timing and generate a first timing time value when the valve is controlled to open according to the preset valve opening standard value; obtain an actual valve opening signal, the actual opening signal including the actual valve opening value; if the actual opening value does not reach the valve opening standard value and the first timing time value reaches the preset first standard time value; obtain a second pressure value of the medium-pressure steam extraction main pipe; subtract the second pressure value from the The preset adjustment set value is used to obtain the fine-tuning difference; if the fine-tuning difference is greater than zero, the valve is controlled to be closed according to the fine-tuning difference; if the fine-tuning difference is less than zero, the valve is controlled to be opened according to the fine-tuning difference; it is also used to start timing and generate a second timing time value when the valve is controlled to be opened according to the preset valve opening standard value; compare the second timing time value with the preset second standard time value; if the second timing time value is equal to the second standard time value, obtain the actual opening value of the valve; calculate the opening difference between the actual opening value and the output value of the valve opening instruction; if the opening difference exceeds the preset standard opening difference, switch the control mode of the valve to manual mode.

5. A computer device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute the method according to any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that: A computer program is stored which can be loaded by a processor and execute the method as claimed in any one of claims 1 to 3.

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