An air preheater control method, system, intelligent terminal and storage medium

Abstract

The present application relates to an air preheater control method, system, intelligent terminal and storage medium, and relates to the field of air preheater technology, including obtaining a preheating trigger signal of the air preheater; obtaining the required preheating temperature of the air preheater based on the preheating trigger signal; determining the valve opening of the air preheater according to the required preheating temperature and the preset temperature-opening relationship; controlling a preset pipeline system to send hot water to the air preheater according to the valve opening, and obtaining the outlet hot air temperature of the air preheater; and controlling the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the required preheating temperature. The present application has the effect of improving the uniformity of heating of the burner front air preheater.

Description

Technical Field

[0001] This application relates to the field of air preheater technology, and in particular, to an air preheater control method, system, intelligent terminal, and storage medium. Background Art

[0002] A burner front air preheater is a device used to improve combustion efficiency and is essentially a heat exchange device. In the petrochemical industry, air for combustion support at the bottom of the furnace or on both sides of the furnace body is preheated by the front air preheater, thereby saving the consumption of fuel gas and achieving the purpose of improving the efficiency of the heating furnace.

[0003] In the related art, due to the large load of large heating furnaces, a relatively large number of burners are arranged at the bottom of the furnace or on both sides of the furnace body, and then hot water is sent into each burner front air preheater arranged front and back through a pipeline system, so that the burner front air preheater heats the air to be sent into the heating furnace for combustion support, in order to increase the combustion temperature and improve the combustion efficiency.

[0004] In view of the above related art, due to the pipeline pressure effect in the pipeline system, when hot water flows into the burner front air preheaters arranged front and back, the phenomenon of small hot water flow in the front and large hot water flow in the back will occur, resulting in a large difference in the outlet temperature of the front and back burner front air preheaters, and thus a large temperature difference between the front and back of the heating furnace hearth temperature, leading to a decline in the heat exchange effect of the burner front air preheater, causing uneven heating, and there is still room for improvement. Summary of the Invention

[0005] In order to improve the heat exchange effect of the front air preheater and the uniformity of heating of the burner front air preheater, this application provides an air preheater control method, system, intelligent terminal, and storage medium.

[0006] In a first aspect, this application provides an air preheater control method, adopting the following technical solution:

[0007] An air preheater control method includes:

[0008] Obtain a preheating trigger signal of the air preheater;

[0009] Based on the preheating trigger signal, obtain the temperature to be preheated of the air preheater;

[0010] Determine the valve opening of the air preheater according to the temperature to be preheated and the preset temperature-opening relationship;

[0011] According to the valve opening, control the preset pipeline system to send hot water to the air preheater, and obtain the outlet hot air temperature of the air preheater;

[0012] Control the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the temperature to be preheated.

[0013] By adopting the above technical solution, when the air preheater needs to preheat the air, control the pipeline system to send hot water to the air preheater according to the valve opening, detect the outlet hot air temperature, and then adjust the opening of the pipeline system according to the outlet hot air temperature and the temperature to be preheated, and continue to send hot water to the air preheater, so as to ensure that the temperatures of all air preheaters tend to the same temperature, improve the heat exchange effect of the air preheater, and further improve the uniformity of heating of the air preheater.

[0014] Optionally, the steps of controlling the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the temperature to be preheated include:

[0015] Judge whether the outlet hot air temperature meets the requirement of the temperature to be preheated;

[0016] If it meets the requirement, continue to control the pipeline system to send hot water to the air preheater according to the valve opening, and continue to obtain the outlet hot air temperature of the air preheater for cyclic judgment;

[0017] If it does not meet the requirement, calculate the difference between the outlet hot air temperature and the temperature to be preheated, and define the calculated difference as the temperature to be adjusted;

[0018] Control the pipeline system to continue sending hot water to the air preheater according to the temperature to be adjusted, and continue to obtain the outlet hot air temperature of the air preheater for cyclic judgment.

[0019] By adopting the above technical solution, when the outlet hot air temperature does not meet the requirement of the temperature to be preheated, calculate the difference between the outlet hot air temperature and the temperature to be preheated to obtain the temperature to be adjusted, and control the pipeline system to adjust the opening according to the temperature to be adjusted and then continue to send hot water to the air preheater, so as to ensure timely regulation when the outlet hot air temperature of the air preheater changes, improve the heat exchange effect of the air preheater, and further improve the uniformity of heating of the air preheater.

[0020] Optionally, the steps of controlling the pipeline system to continue sending hot water to the air preheater according to the temperature to be adjusted include:

[0021] Analyze the temperature to be adjusted to determine the opening adjustment direction of the pipeline system;

[0022] Determine the adjustment opening of the pipeline system according to the temperature to be adjusted and the preset relationship between the temperature and the adjustment opening;

[0023] Adjust the pipeline system according to the opening adjustment direction and the adjustment opening, and control the adjusted pipeline system to send hot water to the air preheater.

[0024] By adopting the above technical solution, the opening adjustment direction is determined according to the positive or negative of the temperature to be adjusted, and then the adjustment opening is determined according to the relationship between the temperature to be adjusted and the temperature adjustment opening. Thus, the pipeline system is adjusted with the opening adjustment direction by the adjustment opening, and the adjusted pipeline system sends hot water to the air preheater, so that the heat exchange effect of the air preheater can be controlled, and further the accuracy of the pipeline system adjustment is improved.

[0025] Optionally, the steps of adjusting the pipeline system according to the opening adjustment direction and the adjustment opening include:

[0026] Obtain the valve number corresponding to the outlet hot air temperature;

[0027] Determine the valve associated number according to the valve number and the preset associated number relationship;

[0028] Adjust the valves corresponding to the valve number and the valve associated number in the pipeline system according to the opening adjustment direction and the adjustment opening.

[0029] By adopting the above technical solution, the valve number corresponding to the outlet hot air temperature is detected, and then the valve associated number associated with the valve number is called, so that the valves corresponding to the valve number and the valve associated number are adjusted simultaneously according to the opening adjustment direction and the adjustment opening, and further the convenience of the pipeline system adjustment is improved.

[0030] Optionally, after the pipeline system sends hot water to the air preheater, it further includes a partition preheating step, and the specific steps include:

[0031] Obtain the material distribution parameters of the preset cracking furnace;

[0032] Judge whether the material distribution parameters meet the requirements of the preset reference distribution parameters;

[0033] If it meets the requirements, continue to control the pipeline system to send hot water to the air preheater, and continue to obtain the material distribution parameters of the cracking furnace for cyclic judgment;

[0034] If it does not meet the requirements, control the pipeline system to send hot water to the air preheater according to the material distribution parameters.

[0035] By adopting the above technical solution, when the material distribution parameters do not meet the requirements of the reference distribution parameters, the pipeline system is controlled to be adjusted according to the material distribution parameters, so that the air preheater is heated as required instead of being uniformly heated, realizing the control of the heat exchange effect of the air preheater, and further improving the accuracy of the air preheater heating.

[0036] Optionally, the steps of controlling the pipeline system to send hot water to the air preheater according to the material distribution parameters include:

[0037] Analyze the material distribution parameters and the reference distribution parameters to determine the abnormal material distribution parameters;

[0038] Analyze the abnormal material distribution parameters to determine the abnormal distribution zones;

[0039] Determine the adjustment valve numbers according to the abnormal distribution zones and the preset relationship between the zones and the valves;

[0040] Analyze the abnormal material distribution parameters and the reference distribution parameters to determine the material difference parameters;

[0041] Analyze the material difference parameters to determine the adjustment direction for each zone;

[0042] Determine the adjustment opening for each zone according to the material difference parameters and the preset relationship between the difference parameters and the opening degrees;

[0043] Adjust the opening degrees of the valves corresponding to the adjustment valve numbers in the pipeline system according to the adjustment direction for each zone and the adjustment opening for each zone, and control the adjusted pipeline system to send hot water to the air preheater.

[0044] By adopting the above technical solution, determine the abnormal distribution zones according to the abnormal material distribution parameters, then determine the adjustment valve numbers according to the abnormal distribution zones and the relationship between the zones and the valves, and determine the adjustment direction for each zone and the adjustment opening for each zone according to the material difference parameters, so as to adjust the opening degrees of the valves corresponding to the adjustment valve numbers according to the adjustment direction for each zone and the adjustment opening for each zone, so that the corresponding air preheater can be preheated at the required temperature, realize the control of the heat exchange effect of the air preheater, and further improve the accuracy of the preheating of the air preheater.

[0045] Optionally, the steps for obtaining the material distribution parameters of the preset cracking furnace include:

[0046] Control the preset material detection device to detect the material in the cracking furnace to generate the characteristics of the material detection signal;

[0047] Determine the material detection concentration according to the characteristics of the material detection signal and the preset relationship between the signal and the material concentration;

[0048] Obtain the device number corresponding to the characteristics of the material detection signal;

[0049] Determine the material zones according to the device number and the preset relationship between the devices and the zones;

[0050] Associate the material zones and the material detection concentration to generate the material distribution parameters.

[0051] By adopting the above technical solution, the detected material concentration is determined according to the characteristics of the material detection signal and the relationship between the signal and the material concentration, and the material partition is determined according to the device serial number and the device partition relationship. Then, after correlating the material partition and the detected material concentration, the material distribution parameters are generated, thereby improving the accuracy of determining the material distribution parameters.

[0052] In a second aspect, the present application provides an air preheater control system, adopting the following technical solution:

[0053] An air preheater control system includes:

[0054] An acquisition module for acquiring a preheating trigger signal, a required preheating temperature, and an outlet hot air temperature;

[0055] A memory for storing a program of an air preheater control method as described in any one of the above;

[0056] A processor, and the program in the memory can be loaded and executed by the processor to implement an air preheater control method as described in any one of the above.

[0057] By adopting the above technical solution, the processor loads and executes the program of an air preheater control method stored in the memory, thereby controlling the acquisition module to acquire a series of data related to the air preheater control. When the air preheater needs to preheat the air, the pipeline system is controlled according to the valve opening to send hot water to the air preheater, and the outlet hot air temperature is detected. Then, according to the outlet hot air temperature and the required preheating temperature, the opening of the pipeline system is adjusted and hot water is continuously sent to the air preheater, thereby ensuring that the temperatures of all air preheaters tend to the same temperature, improving the heat exchange effect of the pre-stage air preheater, and further improving the uniformity of the air preheater heating.

[0058] In a third aspect, the present application provides an intelligent terminal, adopting the following technical solution:

[0059] An intelligent terminal includes a memory and a processor, and a computer program capable of being loaded and executed by the processor as described in any one of the above air preheater control methods is stored on the memory.

[0060] By adopting the above technical solution, by operating the intelligent terminal, the processor loads and executes the computer program of an air preheater control method stored in the memory. When the air preheater needs to preheat the air, the pipeline system is controlled according to the valve opening to send hot water to the air preheater, and the outlet hot air temperature is detected. Then, according to the outlet hot air temperature and the required preheating temperature, the opening of the pipeline system is adjusted and hot water is continuously sent to the air preheater, thereby ensuring that the temperatures of all air preheaters tend to the same temperature, improving the heat exchange effect of the pre-stage air preheater, and further improving the uniformity of the air preheater heating.

[0061] In a fourth aspect, the present application provides a computer storage medium that can store corresponding programs and has the characteristic of facilitating the improvement of the heating uniformity of the pre - air - heater of the burner. The following technical solution is adopted:

[0062] A computer - readable storage medium stores a computer program that can be loaded and executed by a processor to perform any of the above - mentioned air - heater control methods.

[0063] By adopting the above - mentioned technical solution, a computer program for an air - heater control method is stored in the computer - readable storage medium, enabling the processor to load and execute the computer program in the storage medium. Thus, when the air - heater needs to pre - heat air, the pipeline system is controlled according to the valve opening to send hot water to the air - heater, and the outlet hot - air temperature is detected. Then, after adjusting the opening of the pipeline system according to the outlet hot - air temperature and the temperature to be pre - heated, hot water is continuously sent to the air - heater, thereby ensuring that the temperatures of all air - heaters tend to the same temperature, improving the heat - exchange effect of the pre - air - heater, and further improving the heating uniformity of the air - heater.

[0064] In summary, the present application includes at least one of the following beneficial technical effects:

[0065] When the air - heater needs to pre - heat air, the pipeline system is controlled according to the valve opening to send hot water to the air - heater, and the outlet hot - air temperature is detected. Then, after adjusting the opening of the pipeline system according to the outlet hot - air temperature and the temperature to be pre - heated, hot water is continuously sent to the air - heater, thereby ensuring that the temperatures of all air - heaters tend to the same temperature, improving the heat - exchange effect of the air - heater, and further improving the heating uniformity of the air - heater;

[0066] When the outlet hot - air temperature does not meet the requirement of the temperature to be pre - heated, the difference between the outlet hot - air temperature and the temperature to be pre - heated is calculated to obtain the temperature to be adjusted. The pipeline system is controlled according to the temperature to be adjusted to adjust the opening and then continuously send hot water to the air - heater, thereby ensuring timely regulation when the outlet hot - air temperature of the air - heater changes, and further improving the heating uniformity of the air - heater;

[0067] By determining the abnormal - distribution partition according to the material abnormal - distribution parameter, then determining the adjustment - valve serial number according to the relationship between the abnormal - distribution partition and the partition valve, and determining the partition adjustment direction and the partition adjustment opening according to the material - difference parameter, the opening of the valve corresponding to the adjustment - valve serial number is adjusted according to the partition adjustment direction and the partition adjustment opening, so that the corresponding air - heater can be pre - heated at the required temperature, and further improving the accuracy of the air - heater pre - heating. Description of the Drawings

[0068] Figure 1It is a flowchart of a method for controlling an air preheater in an embodiment of the present application.

[0069] Figure 2 It is a flowchart of the step of controlling the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the temperature to be preheated in an embodiment of the present application.

[0070] Figure 3 It is a flowchart of the step of controlling the pipeline system to continue sending hot water to the air preheater according to the temperature to be adjusted in an embodiment of the present application.

[0071] Figure 4 It is a flowchart of the step of adjusting the pipeline system according to the opening adjustment direction and the adjustment opening in an embodiment of the present application.

[0072] Figure 5 It is a flowchart of the step of zone preheating in an embodiment of the present application.

[0073] Figure 6 It is a flowchart of the step of controlling the pipeline system to send hot water to the air preheater according to the material distribution parameter in an embodiment of the present application.

[0074] Figure 7 It is a flowchart of the step of obtaining the material distribution parameter of a preset cracking furnace in an embodiment of the present application.

[0075] Figure 8 It is a distribution diagram of the pipeline system and the air preheater in an embodiment of the present application. Detailed implementation manners

[0076] In order to make the objectives, technical solutions and advantages of the present application clearer, the following further describes the present application in detail with reference to the accompanying Figures 1 to 8 drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0077] An embodiment of the present application discloses a method for controlling an air preheater, specifically discloses a processing terminal, a sensor device and a pipeline system. The processing terminal is respectively connected to the sensor device and the pipeline system through data wires, so as to realize data interaction and control. When the processing terminal receives a preheating trigger signal of the air preheater, the processing terminal calls the required preheating temperature, and determines the valve opening according to the relationship between the required preheating temperature and the temperature opening. The processing terminal controls the pipeline system to send hot water to the air preheater according to the valve opening, and controls the sensor device to detect the outlet hot air temperature of the air preheater and send it to the processing terminal. After the processing terminal adjusts the pipeline system according to the outlet hot air temperature and the required preheating temperature, the adjusted pipeline system continues to send hot water to the air preheater, so that the temperatures of all air preheaters tend to the same temperature, thereby improving the heat exchange effect of the air preheater and improving the uniformity of air preheater heating.

[0078] Referring to Figure 1 , an embodiment of the present application discloses a method for controlling an air preheater, including the following steps:

[0079] Step S100: Obtain a preheating trigger signal of the air preheater.

[0080] Among them, an air preheater refers to a device that preheats air by means of heat exchange and then sends the preheated air into a combustion furnace for combustion assistance. Referring to Figure 8 , the air preheaters are arranged at the bottom or on both sides of the combustion furnace according to the front and back distribution. The air preheaters are communicated with the pipeline system. A stop valve is installed at the water inlet of the air preheater, so that the pipeline system sends hot water to the air preheater, and heat exchange occurs between the hot water and the air, thereby preheating the air. In Figure 8 , only the air preheater E-01A, air preheater E-02A, air preheater E-03A, air preheater E-04A, air preheater E-05A, air preheater E-06A, air preheater E-07A, air preheater E-01B, air preheater E-02B, air preheater E-03B, air preheater E-04B, air preheater E-05B, air preheater E-06B and air preheater E-07B are shown. The number of air preheaters can be more or less. The position distribution of the air preheaters can be set by technicians themselves.

[0081] The preheating trigger signal refers to a trigger signal that requires the air preheater to preheat the air, which is obtained by an operator inputting in the processing terminal.

[0082] Step S101: Obtain the required preheating temperature of the air preheater based on the preheating trigger signal.

[0083] Among them, when the processing terminal receives a preheating trigger signal, it indicates that the air preheater needs to provide air with a higher temperature to the combustion furnace. Therefore, the temperature to be preheated of the air preheater is detected to provide data support for the subsequent control of the pipeline system to supply hot water to the air preheater.

[0084] The temperature to be preheated refers to the temperature value to which the air preheater needs to heat the air, which is input by the operator and stored in the processing terminal, and is called by the processing terminal.

[0085] Step S102: Determine the valve opening of the air preheater according to the temperature to be preheated and the preset temperature-opening relationship.

[0086] Among them, the temperature-opening relationship refers to the corresponding relationship between the temperature to be preheated and the valve opening. The greater the temperature to be preheated, the greater the valve opening, and the better the heat exchange effect of the air preheater. The operator makes actual opening adjustments to different valves, thereby recording the temperatures corresponding to different openings of different valves, and then forming a mapping table after corresponding the openings and temperatures one by one.

[0087] The valve opening refers to the opening of the valve, which is obtained by the processing terminal looking up in the mapping table corresponding to the temperature-opening relationship according to the temperature to be preheated.

[0088] Step S103: Control the preset pipeline system to send hot water to the air preheater according to the valve opening, and obtain the outlet hot air temperature of the air preheater.

[0089] Among them, after the processing terminal determines the valve opening, the processing terminal controls the corresponding valve in the pipeline system to open according to the valve opening, so that when the pipeline system supplies hot water to the air preheaters distributed front and back, it can ensure that under the influence of the pipeline pressure effect, the flow rates of all air preheaters are consistent, so as to ensure that the temperatures of all air preheaters are as consistent as possible, and detect the outlet hot air temperature of the air preheater to provide data support for the subsequent supply of hot water to the air preheater by the pipeline system.

[0090] The pipeline system refers to the pipeline used to supply hot water to the air preheater. Refer to Figure 8 , the pipeline system in the embodiment of the present application adopts the main pipe system for supplying and returning water. The pipeline system includes an inlet main pipe 81 and an outlet main pipe 82, and stop valves are installed at the inlet and outlet hot water pipes of the air preheater, and a temperature sensor is installed at the air outlet of the air preheater. In the embodiment of the present application, the temperature sensor adopts a multiple temperature sampling point, and one temperature sensor can be associated with three nearby air preheaters.

[0091] The outlet hot air temperature refers to the temperature value of the hot air at the outlet of the air preheater. Refer to Figure 8 , which is detected by the temperature sensor installed on the air preheater and sent to the processing terminal.

[0092] Step S104: Control the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the temperature to be preheated.

[0093] After the processing terminal determines the outlet hot air temperature of the air preheater, the processing terminal controls the pipeline system to continue sending hot water to the air preheater according to the difference between the outlet hot air temperature and the temperature to be preheated.

[0094] Refer to Figure 2 , the steps of controlling the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the temperature to be preheated include:

[0095] Step S200: Judge whether the outlet hot air temperature meets the requirement of the temperature to be preheated.

[0096] The requirement of the temperature to be preheated means within the temperature range of the temperature to be preheated, and the temperature range is within 1 degree Celsius up and down.

[0097] The processing terminal judges whether the outlet hot air temperature is within the temperature range of the temperature to be preheated, so as to determine whether the hot air temperature of the air preheater meets the requirement of uniform heating.

[0098] Step S201: If it meets the requirement, continue to control the pipeline system to send hot water to the air preheater according to the valve opening, and continue to obtain the outlet hot air temperature of the air preheater for cyclic judgment.

[0099] If the processing terminal determines that the outlet hot air temperature is within the temperature range of the temperature to be preheated, it indicates that the hot air temperature of the air preheater tends to the temperature to be preheated and meets the requirement of uniform heating. Therefore, continue to follow up the valve opening to control the corresponding valve of the pipeline system to open, so as to continue sending hot water to the air preheater to ensure uniform heating of the air preheater, and continue to detect the outlet hot air temperature of the air preheater, so as to continuously monitor the temperature change of the air preheater.

[0100] Step S202: If it does not meet the requirement, calculate the difference between the outlet hot air temperature and the temperature to be preheated, and define the calculated difference as the temperature to be adjusted.

[0101] If the processing terminal determines that the outlet hot air temperature is not within the temperature range of the temperature to be preheated, it indicates that the temperature of the air preheater has deviated from the temperature to be preheated at this time, and the uniform heating of the air preheater cannot be guaranteed. Therefore, calculate the difference between the outlet hot air temperature and the temperature to be preheated to obtain the temperature to be adjusted, so as to provide data support for the subsequent adjustment of the pipeline system.

[0102] The temperature to be adjusted refers to the temperature value that the air preheater needs to be adjusted, which is obtained by the processing terminal calculating the difference between the outlet hot air temperature and the temperature to be preheated.

[0103] Step S203: According to the temperature to be adjusted, continue to send hot water to the air preheater through the pipeline system, and continue to obtain the outlet hot air temperature of the air preheater for cyclic judgment.

[0104] After the processing terminal obtains the temperature to be adjusted, the processing terminal adjusts the corresponding valve on the pipeline system according to the temperature to be adjusted, so as to continue to send hot water to the air preheater through the adjusted pipeline system. For the specific method, refer to Figure 3 to ensure that the temperature of the air preheater tends to the same temperature value, and continue to detect the outlet hot air temperature of the air preheater, so as to continuously monitor the temperature change of the air preheater.

[0105] Refer to Figure 3 , the steps of continuing to send hot water to the air preheater according to the temperature to be adjusted by controlling the pipeline system include:

[0106] Step S300: Analyze the temperature to be adjusted to determine the opening adjustment direction of the pipeline system.

[0107] The opening adjustment direction refers to the opening adjustment direction of the valve in the pipeline system, including two directions: increasing the opening and decreasing the opening. The processing terminal analyzes the temperature to be adjusted. If the temperature to be adjusted is positive, the opening adjustment direction is to decrease the opening; if the temperature to be adjusted is negative, the opening adjustment direction is to increase the opening.

[0108] Step S301: Determine the adjustment opening of the pipeline system according to the temperature to be adjusted and the preset relationship between the temperature adjustment and the opening.

[0109] The relationship between the temperature adjustment and the opening refers to the corresponding relationship between the temperature to be adjusted and the adjustment opening. The greater the temperature to be adjusted, the greater the adjustment opening. After the operator adjusts different valves with different openings, record the corresponding changed temperature, and form a mapping table by corresponding the adjustment opening with the changed temperature one by one.

[0110] The adjustment opening refers to the opening that the valve in the pipeline system needs to be adjusted, which is obtained by the processing terminal looking up in the mapping table corresponding to the relationship between the temperature adjustment and the opening according to the temperature to be adjusted.

[0111] Step S302: Adjust the pipeline system according to the opening adjustment direction and the adjustment opening, and control the adjusted pipeline system to send hot water to the air preheater.

[0112] After the processing terminal determines the opening adjustment direction and the adjustment opening, the processing terminal adjusts the valve in the pipeline system with the adjustment opening according to the opening adjustment direction. For the specific method, refer to Figure 4 to make the adjusted pipeline system continue to send hot water to the air preheater to ensure uniform heating of the air preheater.

[0113] Refer to Figure 4 , the steps of adjusting the pipeline system according to the opening adjustment direction and the adjustment opening include:

[0114] Step S400: Obtain the valve number corresponding to the outlet hot air temperature;

[0115] Among them, the valve number refers to the number of the valve in the pipeline system corresponding to the air preheater with inconsistent temperatures. After being identified by the processing terminal, it is the number of the temperature sensor suffixed to the hot air temperature, and then the valve number is called according to the one-to-one correspondence relationship between the temperature sensor number and the valve number.

[0116] Step S401: Determine the valve associated number according to the valve number and the preset associated number relationship.

[0117] Among them, the associated number relationship refers to the association relationship between valves. In the embodiment of the present application, temperature detection is performed in a group of three air preheaters. Therefore, the adjacent three valves are associated valves, and the operator forms a mapping table by corresponding the valve numbers.

[0118] The valve associated number refers to the number of the valve associated with the valve number, which is obtained by the processing terminal searching in the mapping table corresponding to the associated number relationship according to the valve number.

[0119] Step S402: Adjust the valves corresponding to the valve number and the valve associated number in the pipeline system according to the opening adjustment direction and the adjustment opening.

[0120] Among them, after the processing terminal determines the valve number and the valve associated number, the processing terminal adjusts the valves corresponding to the valve number and the valve associated number in the pipeline system according to the opening adjustment direction and the adjustment opening, so that the temperature of one air preheater can represent the temperature of the associated air preheater, thereby performing associated adjustment, saving the time of repeated detection, and improving the adjustment efficiency.

[0121] Refer to Figure 5 , after the pipeline system sends hot water to the air preheater, it further includes a zoning preheating step, and the specific steps include:

[0122] Step S500: Obtain the material distribution parameters of the preset cracking furnace.

[0123] Among them, the cracking furnace refers to a heating furnace that uses raw materials such as crude oil to heat and produce ethylene or styrene. The material distribution parameter refers to the distribution concentration of the material at different positions in the cracking furnace. The specific acquisition method refers to Figure 7 the steps.

[0124] Step S501: Determine whether the material distribution parameters meet the requirements of the preset reference distribution parameters.

[0125] Among them, the reference distribution parameter refers to the standard material concentration in different zones of the cracking furnace, and the specific value is determined by the operator according to the actual situation. The requirement for the reference distribution parameter means that the material concentration in the zone corresponding to the reference distribution parameter is consistent.

[0126] The processing terminal determines whether the material concentration in the zone corresponding to the material distribution parameter is consistent with the material concentration in the zone corresponding to the reference distribution parameter, so as to determine whether the materials in the cracking furnace are evenly distributed, and further determine whether the preheating temperature of the air preheater needs to be adjusted.

[0127] Step S5011: If it meets the requirements, continue to control the pipeline system to send hot water to the air preheater, and continue to obtain the material distribution parameter of the cracking furnace for cyclic judgment.

[0128] Among them, if the processing terminal determines that the material concentration in the zone corresponding to the material distribution parameter is consistent with the material concentration in the zone corresponding to the reference distribution parameter, it indicates that the materials in the cracking furnace are evenly distributed. Therefore, it is not necessary to adjust the preheating temperature of the air preheater. Thus, control the pipeline system to continue to send hot water to the air preheater at the original opening degree, and continue to detect the material distribution parameter of the cracking furnace, so as to continuously pay attention to the material distribution situation in the cracking furnace.

[0129] Step S5012: If it does not meet the requirements, control the pipeline system to send hot water to the air preheater according to the material distribution parameter.

[0130] Among them, if the processing terminal determines that the material concentration in the zone corresponding to the material distribution parameter is inconsistent with the material concentration in the zone corresponding to the reference distribution parameter, it indicates that there is a situation where the material concentration is relatively high or relatively low in the zone of the cracking furnace. If preheating is still carried out at the original temperature, carbon deposition or incomplete cracking of the cracking furnace will occur. Therefore, control the pipeline system to adjust and then send hot water to the air preheater according to the material distribution parameter. The specific method refers to Figure 6 the steps, so as to ensure that all materials are cracked at an appropriate temperature and ensure that there is no excessive carbon deposition.

[0131] Refer to Figure 6 , the steps of controlling the pipeline system to send hot water to the air preheater according to the material distribution parameter include:

[0132] Step S600: Analyze the material distribution parameter and the reference distribution parameter to determine the abnormal material distribution parameter.

[0133] Among them, the abnormal material distribution parameter refers to the zone where the material distribution in the cracking furnace is uneven and the corresponding material concentration, which is obtained by the processing terminal comparing the material distribution parameter and the reference distribution parameter and identifying and selecting different zones and the corresponding material concentrations therefrom.

[0134] Step S601: Analyze the abnormal distribution parameters of the materials to determine the abnormal distribution zones.

[0135] Among them, the abnormal distribution zone refers to the zone where the material distribution in the cracking furnace is uneven, and is identified by the processing terminal for the abnormal zone corresponding to the abnormal distribution parameters of the materials.

[0136] Step S602: Determine the adjustment valve number according to the abnormal distribution zone and the preset relationship between the zones and valves.

[0137] Among them, the relationship between the zones and valves refers to the corresponding relationship between different zones and the valves in the pipeline system. After the operator corresponds the zones of the cracking furnace supplied with air preheater gas to the valve numbers responsible for supplying hot water to the air preheater one by one, a mapping table is formed.

[0138] The adjustment valve number refers to the number of the valve responsible for supplying hot water to the air preheater that needs to be adjusted, and is obtained by the processing terminal searching in the mapping table corresponding to the relationship between the zones and valves according to the abnormal distribution zone.

[0139] Step S603: Analyze the abnormal distribution parameters of the materials and the reference distribution parameters to determine the material difference parameters.

[0140] Among them, the material difference parameter refers to the gap between the material concentration in the abnormal zone of the cracking furnace and the standard concentration, and is obtained by the processing terminal calculating the difference between the material concentration corresponding to the abnormal distribution parameters of the materials and the standard material concentration corresponding to the reference distribution parameters.

[0141] Step S604: Analyze the material difference parameters to determine the adjustment direction of the zones.

[0142] Among them, the adjustment direction of the zones refers to the adjustment direction of the opening degree of the valve corresponding to the zone, and is determined by the processing terminal analyzing the positive and negative of the material difference parameters. If the material difference parameter is positive, the adjustment direction of the zone is to increase the opening degree; if the material difference parameter is negative, the adjustment direction of the zone is to decrease the opening degree.

[0143] Step S605: Determine the adjustment opening degree of the zones according to the material difference parameters and the preset relationship between the difference parameters and the opening degrees.

[0144] Among them, the relationship between the difference parameters and the opening degrees refers to the corresponding relationship between the material concentration difference and the adjustment opening degree. The greater the material concentration difference, the greater the adjustment opening degree. The operator adjusts the opening degree for materials with different concentrations, calculates the difference between the optimal opening degree and the standard opening degree to obtain the adjustment opening degree, and forms a mapping table by corresponding the material concentration and the adjustment opening degree one by one.

[0145] The partition adjustment opening refers to the opening that the valve corresponding to the partition needs to be adjusted, which is obtained by the processing terminal looking up in the mapping table corresponding to the opening relationship of the difference parameters according to the material difference concentration corresponding to the material difference parameters.

[0146] Step S606: Adjust the opening of the valve corresponding to the adjustment valve number in the pipeline system according to the partition adjustment direction and the partition adjustment opening, and control the adjusted pipeline system to send hot water to the air preheater.

[0147] Among them, after the processing terminal determines the partition adjustment direction and the partition adjustment opening, the processing terminal controls the valve corresponding to the adjustment valve number in the pipeline system to adjust the opening with the partition adjustment direction and the partition adjustment opening, and after the adjustment is completed, controls the pipeline system to continue to send hot water to the air preheater, so that the air preheater sends air at an appropriate temperature into the combustion furnace of the cracking furnace, thereby ensuring that the material can be completely cracked and no more carbon deposition will occur.

[0148] Refer to Figure 7 , the steps of obtaining the material distribution parameters of the preset cracking furnace include:

[0149] Step S700: Control the preset material detection device to detect the material in the cracking furnace to generate the material detection signal characteristics.

[0150] Among them, the material detection device refers to a device used to detect the material concentration in different partitions of the cracking furnace. In this application, the ultrasonic detection method is adopted. Ultrasonic transmitters and receivers are installed in different partitions of the cracking furnace. The transmitter sends ultrasonic signals into the cracking furnace, and the receiver captures the signals after being propagated through the material.

[0151] The material detection signal characteristics refer to the signal characteristics after the ultrasonic wave propagates through the material, including the propagation time, amplitude attenuation, and frequency change characteristics, which are obtained by the material detection device detecting the material in different partitions of the cracking furnace.

[0152] Step S701: Determine the material detection concentration according to the material detection signal characteristics and the preset signal-material concentration relationship.

[0153] Among them, the signal-material concentration relationship refers to the corresponding relationship between the signal characteristics and the material concentration, which is established by the operator detecting the material with a known concentration and establishing a mapping table between the detection signal characteristics and the material concentration.

[0154] The material detection concentration refers to the material concentration detected in the cracking furnace, which is obtained by the processing terminal looking up in the mapping table corresponding to the signal-material concentration relationship according to the material detection signal characteristics.

[0155] Step S702: Obtain the device number corresponding to the material detection signal characteristics.

[0156] Among them, the device serial number refers to the serial number of the material detection device that detects the characteristics of the material detection signal, and is obtained by the processing terminal identifying the device serial number in the suffix of the material detection signal.

[0157] Step S703: Determine the material partition according to the device serial number and the preset device partition relationship.

[0158] Among them, the device partition relationship refers to the corresponding relationship between the material detection devices for the partition of the cracking furnace. The operator forms a mapping table by corresponding the serial numbers of the material detection devices installed in different partitions with the corresponding partitions.

[0159] The material partition refers to the partition to which the detected material concentration belongs, and is obtained by the processing terminal looking up in the mapping table corresponding to the device partition relationship according to the device serial number.

[0160] Step S704: Associate the material partition and the material detection concentration to generate the material distribution parameter.

[0161] Among them, the material distribution parameter in this step is the same as the material distribution parameter in step S500. The processing terminal associates the material detection concentration with the corresponding material partition to generate the material distribution situation of this partition, and finally integrates the material distribution situations of all partitions to form the material distribution parameter.

[0162] Based on the same inventive concept, an embodiment of the present application provides an air preheater control system, including:

[0163] An acquisition module, configured to acquire a preheating trigger signal, a required preheating temperature, an outlet hot air temperature, a valve serial number, a material distribution parameter, and a device serial number;

[0164] A memory, configured to store a program of an air preheater control method;

[0165] A processor, and the program in the memory can be loaded and executed by the processor and implement an air preheater control method.

[0166] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working processes of the above-described system, device, and unit can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0167] An embodiment of the present application provides a computer-readable storage medium, storing a computer program that can be loaded and executed by a processor to implement an air preheater control method.

[0168] Computer storage media include, for example: various media that can store program codes, such as USB flash drives, external hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs.

[0169] Based on the same inventive concept, embodiments of the present application provide an intelligent terminal, including a memory and a processor. A computer program capable of being loaded and executed by the processor to implement an air preheater control method is stored on the memory.

[0170] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to implement all or part of the functions described above. The specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0171] The above are all preferred embodiments of the present application. The protection scope of the present application is not limited thereby. Any feature disclosed in this specification (including the abstract and drawings), unless specifically described, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically described, each feature is only an example in a series of equivalent or similar features.

Claims

1. A method for controlling an air preheater, characterized in that Including: Obtain the preheating trigger signal of the air preheater; Obtain the required preheating temperature of the air preheater based on the preheating trigger signal; Determine the valve opening of the air preheater according to the required preheating temperature and the preset temperature-opening relationship; Control the preset pipeline system to send hot water to the air preheater according to the valve opening, and obtain the outlet hot air temperature of the air preheater; Control the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the required preheating temperature; After the pipeline system sends hot water to the air preheater, it also includes a zoning preheating step. The specific steps include: obtaining the material distribution parameters of the preset cracking furnace; judging whether the material distribution parameters meet the requirements of the preset reference distribution parameters; if they meet, continue to control the pipeline system to send hot water to the air preheater, and continue to obtain the material distribution parameters of the cracking furnace for cyclic judgment; if they do not meet, control the pipeline system to send hot water to the air preheater according to the material distribution parameters; The step of controlling the pipeline system to send hot water to the air preheater according to the material distribution parameters includes: analyzing the material distribution parameters and the reference distribution parameters to determine the abnormal material distribution parameters; analyzing the abnormal material distribution parameters to determine the abnormal distribution zone; determining the adjustment valve number according to the abnormal distribution zone and the preset zone valve relationship; analyzing the abnormal material distribution parameters and the reference distribution parameters to determine the material difference parameters; analyzing the material difference parameters to determine the zoning adjustment direction; determining the zoning adjustment opening according to the material difference parameters and the preset difference parameter-opening relationship; adjusting the opening of the valve corresponding to the adjustment valve number in the pipeline system according to the zoning adjustment direction and the zoning adjustment opening, and controlling the adjusted pipeline system to send hot water to the air preheater; The step of obtaining the material distribution parameters of the preset cracking furnace includes: controlling the preset material detection device to detect the material in the cracking furnace to generate the material detection signal characteristics. The material detection signal characteristics refer to the signal characteristics after the ultrasonic wave propagates through the material. The material detection signal characteristics include the propagation time, amplitude attenuation, and frequency change characteristics; determining the material detection concentration according to the material detection signal characteristics and the preset signal-material concentration relationship; obtaining the device number corresponding to the material detection signal characteristics; determining the material zone according to the device number and the preset device-zone relationship; associating the material zone and the material detection concentration to generate the material distribution parameters.

2. The air preheater control method according to claim 1, wherein The step of controlling the pipeline system to continue sending hot water to the air preheater according to the outlet hot air temperature and the required preheating temperature includes: Judging whether the outlet hot air temperature meets the requirement of the required preheating temperature; If it meets, continue to control the pipeline system to send hot water to the air preheater according to the valve opening, and continue to obtain the outlet hot air temperature of the air preheater for cyclic judgment; If it does not meet, calculate the difference between the outlet hot air temperature and the required preheating temperature, and define the calculated difference as the temperature to be adjusted; Control the pipeline system to continue sending hot water to the air preheater according to the temperature to be adjusted, and continue to obtain the outlet hot air temperature of the air preheater for cyclic judgment.

3. The air preheater control method according to claim 2, characterized in that, The step of controlling the pipeline system to continue sending hot water to the air preheater according to the temperature to be adjusted includes: Analyze the temperature to be adjusted to determine the adjustment direction of the opening degree of the pipeline system; Determine the adjusted opening degree of the pipeline system according to the temperature to be adjusted and the preset relationship between the temperature and the opening degree adjustment; Adjust the pipeline system according to the opening degree adjustment direction and the adjusted opening degree, and control the adjusted pipeline system to send hot water to the air preheater.

4. The air preheater control method according to claim 3, characterized in that, The steps of adjusting the pipeline system according to the opening degree adjustment direction and the adjusted opening degree include: Obtain the valve number corresponding to the outlet hot air temperature; Determine the valve associated number according to the valve number and the preset relationship of the associated numbers; Adjust the valves corresponding to the valve number and the valve associated number in the pipeline system according to the opening degree adjustment direction and the adjusted opening degree.

5. An air preheater control system, characterized in that, Include: An acquisition module for acquiring a preheating trigger signal, a temperature to be preheated, and an outlet hot air temperature; A memory for storing a program of a method for controlling an air preheater according to any one of claims 1 to 4; A processor, and the program in the memory can be loaded and executed by the processor and implement a method for controlling an air preheater according to any one of claims 1 to 4.

6. An intelligent terminal, characterized in that, It includes a memory and a processor, and a computer program capable of being loaded and executed by the processor and implementing a method for controlling an air preheater according to any one of claims 1 to 4 is stored on the memory.

7. A computer-readable storage medium, characterized in that, A computer program capable of being loaded and executed by the processor and implementing a method for controlling an air preheater according to any one of claims 1 to 4 is stored.

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