Air preheater control method and system, intelligent terminal and storage medium

Abstract

The invention relates to an air preheater control method and system, an intelligent terminal and a storage medium, and relates to the technical field of air preheaters. The preheating temperature of the air preheater is obtained based on the preheating trigger signal; the valve opening degree of the air preheater is determined according to the to-be-preheated temperature and the preset temperature opening degree relation; controlling a preset pipeline system to feed hot water to the air preheater according to the opening degree of the valve, and obtaining the outlet hot air temperature of the air preheater; and the pipeline system is controlled to continuously feed hot water to the air preheater according to the outlet hot air temperature and the to-be-preheated temperature. The air pre-heater has the effect of improving the heating uniformity of the front air pre-heater of the combustor.

Description

Technical Field

[0001] The present 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] Burner pre-air preheater is a device used to improve combustion efficiency. Its essence is a heat exchange device. In the petrochemical industry, the pre-air preheater is used to preheat the air used for combustion of the burners at the bottom of the furnace or on both sides of the furnace body, thereby saving fuel gas consumption and achieving the purpose of improving the efficiency of the heating furnace.

[0003] In the related art, due to the heavy load of a large heating furnace, a large number of burners are installed at the bottom of the furnace or on both sides of the furnace body, and then a pipeline system is used to send hot water to the front and rear air preheaters of each burner, so that the front air preheaters of the burners can heat the air that will enter the heating furnace for combustion, so as to increase the combustion temperature and improve the combustion efficiency.

[0004] With regard to the above-mentioned related technologies, due to the pipeline pressure effect of the pipeline system, when hot water flows into the burner pre-air preheaters arranged in front and behind, the hot water flow rate will be small in the front and large in the back, resulting in an increase in the outlet temperature difference of the front and rear burner pre-air preheaters, which in turn causes a large temperature difference between the front and rear furnace temperatures of the heating furnace, resulting in a decrease in the heat exchange effect of the burner pre-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 pre-air preheater and improve the uniformity of heating of the pre-air preheater of the burner, the present application provides an air preheater control method, system, intelligent terminal and storage medium.

[0006] In a first aspect, the present application provides an air preheater control method, which adopts the following technical solution: An air preheater control method, comprising: Obtaining a preheating trigger signal of an air preheater; Obtaining 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 relationship between the required preheating temperature and the preset temperature opening; Control the preset pipeline system according to the valve opening to send hot water to the air preheater and obtain the outlet hot air temperature of the air preheater; According to the outlet hot air temperature and the required preheating temperature, the pipeline system is controlled to continue to send hot water to the air preheater.

[0007] By adopting the above technical solution, 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, the opening of the pipeline system is adjusted according to the outlet hot air temperature and the required preheating temperature, and hot water is continued to be 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 air preheater, and then improving the uniformity of heating of the air preheater.

[0008] Optionally, the step of controlling the pipeline system to continue to deliver hot water to the air preheater according to the outlet hot air temperature and the preheating temperature to be preheated includes: Determine whether the outlet hot air temperature meets the preheating temperature requirements; If it meets the requirements, the pipeline system will continue to be controlled according to the valve opening to send hot water to the air preheater, and the outlet hot air temperature of the air preheater will continue to be obtained for circulation judgment; If it does not meet the requirements, the difference between the outlet hot air temperature and the required preheating temperature is calculated, and the calculated difference is defined as the required adjustment temperature; The temperature control pipeline system continues to send hot water to the air preheater according to the need to adjust, and continues to obtain the outlet hot air temperature of the air preheater for circulation judgment.

[0009] By adopting the above technical solution, when the outlet hot air temperature does not meet the requirement of the preheating temperature, the difference between the outlet hot air temperature and the preheating temperature is calculated to obtain the temperature to be adjusted. After the opening of the control pipeline system is adjusted according to the temperature to be adjusted, hot water is continued to be sent to the air preheater, thereby ensuring that the outlet hot air temperature of the air preheater is regulated in time when it changes, thereby improving the heat exchange effect of the air preheater and further improving the heating uniformity of the air preheater.

[0010] Optionally, the step of adjusting the temperature control piping system to continue to deliver hot water to the air preheater according to the need includes: Analyze the temperature that needs to be adjusted to determine the direction of the opening adjustment of the pipeline system; Determine the adjustment opening of the pipeline system according to the relationship between the temperature to be adjusted and the preset temperature adjustment opening; The pipe system is adjusted according to the opening adjustment direction and the opening adjustment, and the adjusted pipe system is controlled to send hot water to the air preheater.

[0011] By adopting the above technical scheme, the opening adjustment direction is determined according to the positive or negative value of the temperature to be adjusted, and the adjustment opening is determined according to the relationship between the temperature to be adjusted and the temperature adjustment opening, so that the pipeline system is adjusted to adjust the opening in the opening adjustment direction, 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, thereby improving the accuracy of the pipeline system adjustment.

[0012] Optionally, the steps of adjusting the pipeline system according to the opening adjustment direction and the opening adjustment include: Get the valve number corresponding to the outlet hot air temperature; Determine the valve associated serial number according to the relationship between the valve serial number and the preset associated serial number; The valves corresponding to the valve serial numbers and valve associated serial numbers in the pipeline system are adjusted according to the opening adjustment direction and the adjustment opening.

[0013] 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 valve corresponding to the valve number and the valve associated number can be adjusted according to the opening adjustment direction and the opening adjustment, thereby improving the convenience of pipeline system adjustment.

[0014] Optionally, after the pipeline system delivers the hot water to the air preheater, a zone preheating step is also included, and the specific steps include: Obtaining material distribution parameters of a preset cracking furnace; Determine whether the material distribution parameters meet the requirements of the preset benchmark distribution parameters; If it meets the requirements, the pipeline system will continue to be controlled to send hot water to the air preheater, and the material distribution parameters of the cracking furnace will continue to be obtained for circulation judgment; If it does not meet the requirements, the pipeline system will be controlled to send hot water to the air preheater according to the material distribution parameters.

[0015] By adopting the above technical solution, when the material distribution parameters do not meet the requirements of the benchmark distribution parameters, the pipeline system is controlled to be adjusted according to the material distribution parameters, so that the air preheater is heated on demand instead of being heated uniformly, thereby achieving control over the heat exchange effect of the air preheater and improving the heating accuracy of the air preheater.

[0016] Optionally, the step of controlling the pipeline system to deliver hot water to the air preheater according to the material distribution parameter includes: Analyze the material distribution parameters and the reference distribution parameters to determine the material abnormal distribution parameters; Analyze the abnormal distribution parameters of materials to determine the abnormal distribution zones; Determine and adjust the valve sequence number according to the abnormal distribution partition and the preset partition valve relationship; Analyze the material abnormal distribution parameters and the benchmark distribution parameters to determine the material difference parameters; Analyze material difference parameters to determine the partition adjustment direction; Determine the partition adjustment opening according to the material difference parameter and the preset difference parameter opening relationship; According to the zone adjustment direction and the zone adjustment opening, the opening of the valve corresponding to the adjustment valve serial number in the pipeline system is adjusted, and the adjusted pipeline system is controlled to send hot water to the air preheater.

[0017] By adopting the above technical scheme, the abnormal distribution partition is determined according to the abnormal distribution parameters of the material, and then the adjustment valve serial number is determined according to the abnormal distribution partition and the partition valve relationship, and the partition adjustment direction and the partition adjustment opening are determined according to the material difference parameter, so that 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 preheater can be preheated at the required temperature, the heat exchange effect of the air preheater can be controlled, and the accuracy of the preheating of the air preheater is improved.

[0018] Optionally, the step of obtaining a preset material distribution parameter of a cracking furnace includes: Controlling a preset material detection device to detect the material in the cracking furnace to generate a material detection signal characteristic; Determine the material detection concentration according to the material detection signal characteristics and the preset signal-material concentration relationship; Obtaining the device serial number corresponding to the material detection signal characteristic; Determine the material partition according to the device serial number and the preset device partition relationship; Associate material partitions and material detection concentrations to generate material distribution parameters.

[0019] By adopting the above technical scheme, the material detection concentration is determined according to the material detection signal characteristics and the signal-material concentration relationship, and the material partition is determined according to the device serial number and the device partition relationship, so as to generate material distribution parameters after associating the material partition and material detection concentration, thereby improving the accuracy of determining the material distribution parameters.

[0020] In a second aspect, the present application provides an air preheater control system, which adopts the following technical solution: An air preheater control system, comprising: An acquisition module is used to obtain a preheating trigger signal, a required preheating temperature, and an outlet hot air temperature; A memory for storing a program of an air preheater control method as described in any one of the above items; The program in the processor memory can be loaded and executed by the processor to implement an air preheater control method as described in any one of the above items.

[0021] By adopting the above technical solution, the processor loads and executes a program of an air preheater control method stored in the memory, so that the control acquisition module obtains 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, the opening of the pipeline system is adjusted according to the outlet hot air temperature and the temperature required for preheating, and hot water is continued to be 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 front air preheater, and then improving the heating uniformity of the air preheater.

[0022] In a third aspect, the present application provides a smart terminal, which adopts the following technical solution: An intelligent terminal comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes an air preheater control method as described in any one of the above items.

[0023] By adopting the above technical solution and operating the intelligent terminal, the processor is made to load and execute a 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 to send hot water to the air preheater according to the valve opening, and the outlet hot air temperature is detected. Then, the opening of the pipeline system is adjusted according to the outlet hot air temperature and the temperature required for preheating, and hot water is continued to be 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 front air preheater, and then improving the heating uniformity of the air preheater.

[0024] In a fourth aspect, the present application provides a computer storage medium capable of storing a corresponding program, which is convenient for improving the uniformity of heating of a burner pre-air preheater, and adopts the following technical solution: A computer-readable storage medium stores a computer program that can be loaded by a processor and execute any of the above-mentioned air preheater control methods.

[0025] By adopting the above technical solution, a computer program of an air preheater control method is stored in a computer-readable storage medium, so that the processor loads and executes the computer program in the storage medium, so that 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, and then the opening of the pipeline system is adjusted according to the outlet hot air temperature and the temperature required for preheating, and hot water is continued to be 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 front air preheater, and then improving the heating uniformity of the air preheater.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 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, the opening of the pipeline system is adjusted according to the outlet hot air temperature and the required preheating temperature, and hot water is continued to be sent to the air preheater, thereby ensuring that the temperature of all air preheaters tends to the same temperature, improving the heat exchange effect of the air preheater, and further improving the heating uniformity of the air preheater; When the outlet hot air temperature does not meet the preheating temperature requirement, the difference between the outlet hot air temperature and the preheating temperature is calculated to obtain the required adjustment temperature. The hot water is then sent to the air preheater after the opening of the control pipeline system is adjusted according to the required adjustment temperature, thereby ensuring that the outlet hot air temperature of the air preheater is regulated in time when it changes, thereby improving the heating uniformity of the air preheater. By determining the abnormal distribution partition according to the abnormal distribution parameters of the material, and then determining the adjustment valve serial number according to the abnormal distribution partition and the partition valve relationship, 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 preheater can be preheated at the required temperature, thereby improving the accuracy of air preheating of the air preheater. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of an air preheater control method in an embodiment of the present application.

[0028] Figure 2 It is a flow chart of the steps of controlling the pipeline system to continue to deliver hot water to the air preheater according to the outlet hot air temperature and the required preheating temperature in an embodiment of the present application.

[0029] Figure 3 It is a flow chart of the steps of adjusting the temperature according to the need to control the piping system to continue to send hot water to the air preheater in an embodiment of the present application.

[0030] Figure 4 It is a flow chart of the steps of adjusting the pipeline system according to the opening adjustment direction and the opening adjustment in the embodiment of the present application.

[0031] Figure 5 It is a flow chart of the partition preheating steps in an embodiment of the present application.

[0032] Figure 6 It is a flow chart of the steps of controlling the pipeline system to deliver hot water to the air preheater according to the material distribution parameters in an embodiment of the present application.

[0033] Figure 7It is a flow chart of the steps of obtaining the material distribution parameters of a preset cracking furnace in an embodiment of the present application.

[0034] Figure 8 is a distribution diagram of the pipeline system and the air preheater in the embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figures 1 to 8 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.

[0036] The embodiment of the present application discloses an air preheater control method, 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 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 heating of the air preheater.

[0037] Reference Figure 1 , the embodiment of the present application discloses an air preheater control method, comprising the following steps: Step S100: obtaining a preheating trigger signal of an air preheater.

[0038] The air preheater is a device that preheats the air by heat exchange and then sends the preheated air into the combustion furnace to assist combustion. Figure 8 The air preheater is arranged at the bottom or both sides of the combustion furnace in a front-to-back distribution. The air preheater is connected to 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 is carried out between the hot water and the air, thereby preheating the air. Figure 8In the figure, only 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 the technicians.

[0039] The preheating trigger signal refers to a trigger signal that requires the air preheater to preheat the air, and is input by an operator in the processing terminal.

[0040] Step S101: obtaining the required preheating temperature of the air preheater based on the preheating trigger signal.

[0041] Among them, when the processing terminal receives the preheating trigger signal, it indicates that the air preheater is needed to provide higher temperature air to the combustion furnace. Therefore, the required preheating temperature of the air preheater is detected to provide data support for the subsequent control pipeline system to send hot water to the air preheater.

[0042] The required preheating temperature 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 called by the processing terminal.

[0043] Step S102: determining the valve opening of the air preheater according to the relationship between the required preheating temperature and the preset temperature opening.

[0044] Among them, the temperature opening relationship refers to the corresponding relationship between the required preheating temperature and the valve opening. The larger the required preheating temperature, the larger the valve opening, and the better the heat exchange effect of the air preheater. The operator adjusts the actual opening of different valves to record the temperatures corresponding to different openings of different valves, and then forms a mapping table by corresponding the openings to the temperatures one by one.

[0045] The valve opening refers to the opening of the valve, which is obtained by searching the mapping table corresponding to the temperature opening relationship according to the required preheating temperature by the processing terminal.

[0046] Step S103: Control the preset pipeline system according to the valve opening to send hot water to the air preheater, and obtain the outlet hot air temperature of the air preheater.

[0047] Among them, after the processing terminal determines the valve opening, the processing terminal controls the opening of the corresponding valve in the pipeline system according to the valve opening, so that when the pipeline system delivers hot water to the air preheaters distributed front and rear, it can ensure that the flow of all air preheaters is consistent under the influence of the pipeline pressure effect, thereby ensuring the temperature of all air preheaters as consistent as possible, and detecting the outlet hot air temperature of the air preheater, so as to provide data support for the subsequent pipeline system to continue to deliver hot water to the air preheater.

[0048] The piping system refers to the pipes used to deliver hot water to the air preheater. Figure 8 The pipeline system in the embodiment of the present application adopts a main pipe water supply and return method. 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 multiple temperature sampling points, and one temperature sensor can be associated with three nearby air preheaters.

[0049] The outlet hot air temperature refers to the temperature of the hot air at the outlet of the air preheater. Figure 8 , which is detected by the temperature sensor installed on the air preheater and sent to the processing terminal.

[0050] Step S104: Control the pipeline system to continue to send hot water to the air preheater according to the outlet hot air temperature and the required preheating temperature.

[0051] After the processing terminal determines the outlet hot air temperature of the air preheater, the processing terminal controls the pipeline system to continue to send hot water to the air preheater according to the difference between the outlet hot air temperature and the required preheating temperature.

[0052] Reference Figure 2 The steps of controlling the piping system to continue to deliver hot water to the air preheater according to the outlet hot air temperature and the preheating temperature include: Step S200: Determine whether the outlet hot air temperature meets the preheating temperature requirement.

[0053] The preheating temperature requirement refers to a temperature range within which the preheating temperature is within 1 degree Celsius.

[0054] The processing terminal determines whether the outlet hot air temperature is within the temperature range required for preheating, thereby determining whether the hot air temperature of the air preheater meets the requirement of uniform heating.

[0055] Step S201: If it meets the requirements, the pipeline system is controlled to send hot water to the air preheater according to the valve opening, and the outlet hot air temperature of the air preheater is obtained for circulation judgment.

[0056] Among them, if the processing terminal determines that the outlet hot air temperature is within the temperature range of the required preheating temperature, it means that the hot air temperature of the air preheater tends to the required preheating temperature and meets the requirement of uniform heating. Therefore, the valve opening control pipeline system corresponding to the valve is opened to continue to send hot water to the air preheater to ensure uniform heating of the air preheater, and the outlet hot air temperature of the air preheater is continuously tested to continuously pay attention to the temperature changes of the air preheater.

[0057] Step S202: If not, the difference between the outlet hot air temperature and the required preheating temperature is calculated, and the calculated difference is defined as the required adjustment temperature.

[0058] Among them, if the processing terminal determines that the outlet hot air temperature is not within the temperature range of the required preheating temperature, it means that the temperature of the air preheater at this time has deviated from the required preheating temperature, and the uniform heating of the air preheater cannot be guaranteed. Therefore, the difference between the outlet hot air temperature and the required preheating temperature is calculated to obtain the required adjustment temperature, thereby providing data support for subsequent adjustments to the pipeline system.

[0059] The temperature to be adjusted refers to the temperature value to which the air preheater needs to be adjusted, which is obtained by calculating the difference between the outlet hot air temperature and the required preheating temperature by the processing terminal.

[0060] Step S203: According to the temperature that needs to be adjusted, the pipe system is controlled to continue to send hot water to the air preheater, and the outlet hot air temperature of the air preheater is continuously obtained for cyclic determination.

[0061] Among them, 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 that the adjusted pipeline system continues to send hot water to the air preheater. The specific method is referred to Figure 3 steps 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.

[0062] Reference Figure 3 The steps of adjusting the temperature control piping system to continue to deliver hot water to the air preheater include: Step S300: Analyze the temperature to be adjusted to determine the opening adjustment direction of the pipeline system.

[0063] Among them, the opening adjustment direction refers to the opening adjustment direction of the valve in the pipeline system, including two directions of increasing the opening and decreasing the opening. The processing terminal analyzes the temperature to be adjusted. If the temperature to be adjusted is a positive value, the opening adjustment direction is to decrease the opening. If the temperature to be adjusted is a negative value, the opening adjustment direction is to increase the opening.

[0064] Step S301: determining the adjustment opening of the pipeline system according to the relationship between the temperature to be adjusted and the preset temperature adjustment opening.

[0065] Among them, the temperature adjustment opening relationship refers to the corresponding relationship between the required temperature and the adjusted opening. The larger the required temperature is, the larger the adjusted opening is. After the operator adjusts different valves with different openings, the corresponding changed temperature is recorded, and the adjusted opening and the changed temperature are matched one by one to form a mapping table.

[0066] The adjustment opening refers to the opening that needs to be adjusted for the valve in the pipeline system, which is found by the processing terminal in the mapping table corresponding to the temperature adjustment opening relationship according to the temperature to be adjusted.

[0067] Step S302: adjusting the pipe system according to the opening adjustment direction and the opening adjustment, and controlling the adjusted pipe system to deliver hot water to the air preheater.

[0068] After the processing terminal determines the opening adjustment direction and the adjustment opening, the processing terminal adjusts the valve in the pipeline system to adjust the opening according to the opening adjustment direction. For specific methods, refer to Figure 4 steps, so that the adjusted pipeline system continues to supply hot water to the air preheater to ensure uniform heating of the air preheater.

[0069] Reference Figure 4 , the steps of adjusting the piping system according to the opening adjustment direction and the opening adjustment include: Step S400: obtaining the valve serial number corresponding to the outlet hot air temperature; Among them, the valve serial number refers to the serial number of the valve in the pipeline system corresponding to the air preheater with inconsistent temperature. The processing terminal identifies the temperature sensor serial number with the hot air temperature suffix, and then calls the valve serial number based on the one-to-one correspondence between the temperature sensor serial number and the valve serial number.

[0070] Step S401: Determine the valve associated number according to the relationship between the valve number and the preset associated number.

[0071] Among them, the associated serial number relationship refers to the associated relationship between valves. In the embodiment of the present application, three air preheaters are used as a group for temperature detection, so the three adjacent valves are associated valves, and the operator corresponds the valve serial numbers to form a mapping table.

[0072] The valve associated serial number refers to the serial number of the valve associated with the valve serial number, and is obtained by searching the mapping table corresponding to the associated serial number relationship according to the valve serial number by the processing terminal.

[0073] Step S402: adjusting the valves corresponding to the valve serial numbers and valve associated serial numbers in the pipeline system according to the opening adjustment direction and the adjustment opening.

[0074] Among them, after the processing terminal determines the valve serial number and the valve associated serial number, the processing terminal adjusts the valve corresponding to the valve serial number and the valve associated serial 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 time for repeated detection, and improving adjustment efficiency.

[0075] Reference Figure 5 After the piping system sends the hot water to the air preheater, it also includes a zone preheating step, which includes: Step S500: obtaining material distribution parameters of a preset cracking furnace.

[0076] Among them, the cracking furnace refers to a heating furnace that uses crude oil and other raw materials to heat and produce ethylene or styrene. The material distribution parameter refers to the distribution concentration of the material at different locations in the cracking furnace. For specific acquisition methods, refer to Figure 7 steps.

[0077] Step S501: determine whether the material distribution parameters meet the requirements of the preset reference distribution parameters.

[0078] Among them, the benchmark distribution parameter refers to the standard material concentration in different partitions in the cracking furnace. The specific value is determined by the operator according to the actual situation. The requirement of the benchmark distribution parameter refers to the consistency of the material concentration of the partition corresponding to the benchmark distribution parameter.

[0079] The processing terminal determines whether the material concentration of the partition corresponding to the material distribution parameter is consistent with the material concentration of the partition corresponding to the reference distribution parameter, thereby determining whether the material in the cracking furnace is evenly distributed, and further determining whether the preheating temperature of the air preheater needs to be adjusted.

[0080] Step S5011: If it meets the requirements, the pipeline system is continuously controlled to send hot water to the air preheater, and the material distribution parameters of the cracking furnace are continuously obtained for cyclic judgment.

[0081] Among them, if the processing terminal determines that the material concentration of the partition corresponding to the material distribution parameter is consistent with the material concentration of the partition corresponding to the reference distribution parameter, it means that the material in the cracking furnace is evenly distributed, so there is no need to adjust the preheating temperature of the air preheater, so as to control the pipeline system to continue to send hot water to the air preheater with the original opening, and continue to detect the material distribution parameters of the cracking furnace, so as to continue to pay attention to the material distribution in the cracking furnace.

[0082] Step S5012: If not, the pipeline system is controlled to send hot water to the air preheater according to the material distribution parameters.

[0083] Among them, if the processing terminal determines that the material concentration of the partition corresponding to the material distribution parameter is inconsistent with the material concentration of the partition corresponding to the reference distribution parameter, it indicates that the partition of the cracking furnace has a high material concentration or a low material concentration. If the preheating is still carried out according to the original temperature, carbon deposition or incomplete cracking of the cracking furnace will occur. Therefore, the hot water is sent to the air preheater after the pipeline system is adjusted according to the material distribution parameter control. The specific method is referred to Figure 6 steps, thereby ensuring that the material is completely cracked at the appropriate temperature while ensuring that there is no excessive carbon deposition.

[0084] Reference Figure 6 The steps of controlling the piping system to deliver hot water to the air preheater according to the material distribution parameters include: Step S600: Analyze the material distribution parameters and the reference distribution parameters to determine the abnormal material distribution parameters.

[0085] The abnormal material distribution parameters refer to the partitions where the material is unevenly distributed in the cracking furnace and the corresponding material concentrations. The processing terminal compares the material distribution parameters with the reference distribution parameters to identify and select different partitions and the corresponding material concentrations.

[0086] Step S601: Analyze the abnormal distribution parameters of the material to determine the abnormal distribution partitions.

[0087] The abnormal distribution partition refers to the partition where the material is unevenly distributed in the cracking furnace, which is obtained by identifying the abnormal partition corresponding to the abnormal distribution parameters of the material by the processing terminal.

[0088] Step S602: Determine and adjust the valve sequence number according to the abnormal distribution partition and the preset partition valve relationship.

[0089] Among them, the partition valve relationship refers to the correspondence between different partitions and pipeline system valves. The operator forms a mapping table by matching the cracking furnace partitions supplying gas to the air preheater with the valve serial numbers responsible for supplying hot water to the air preheater.

[0090] The adjustment valve serial number refers to the serial number of the valve responsible for supplying hot water to the air preheater that needs to be adjusted, and is obtained by searching in a mapping table corresponding to a partition valve relationship according to the abnormal distribution partition by the processing terminal.

[0091] Step S603: Analyze the material abnormal distribution parameters and the reference distribution parameters to determine the material difference parameters.

[0092] Among them, the material difference parameter refers to the difference between the material concentration in the abnormal zone of the cracking furnace and the standard concentration, which is calculated by the processing terminal as the difference between the material concentration corresponding to the abnormal material distribution parameter and the standard material concentration corresponding to the benchmark distribution parameter.

[0093] Step S604: Analyze the material difference parameters to determine the partition adjustment direction.

[0094] Among them, the partition adjustment direction refers to the opening adjustment direction of the valve corresponding to the partition, which is determined by the processing terminal after analyzing the positive and negative values ​​of the material difference parameter. If the material difference parameter is a positive value, the partition adjustment direction is to increase the opening; if the material difference parameter is a negative value, the partition adjustment direction is to decrease the opening.

[0095] Step S605: Determine the partition adjustment opening according to the material difference parameter and the preset difference parameter opening relationship.

[0096] Among them, the difference parameter opening relationship refers to the corresponding relationship between the material concentration difference and the adjustment opening. The greater the material concentration difference, the greater the adjustment opening. The operator adjusts the opening according to the materials of different concentrations, so as to calculate the difference between the optimal opening and the standard opening to obtain the adjusted opening, and form a mapping table by corresponding the material concentration and the adjusted opening one by one.

[0097] The zone adjustment opening refers to the opening of the valve corresponding to the zone that needs to be adjusted, which is found by the processing terminal in the mapping table corresponding to the difference parameter opening relationship according to the material difference concentration corresponding to the material difference parameter.

[0098] Step S606: adjusting the opening of the valve corresponding to the adjustment valve serial number in the pipeline system according to the partition adjustment direction and the partition adjustment opening, and controlling the adjusted pipeline system to deliver hot water to the air preheater.

[0099] 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 valve serial number in the pipeline system to adjust the opening according to the partition adjustment direction and the partition adjustment opening, and after the adjustment is completed, the control pipeline system continues to send hot water to the air preheater, so that the air preheater sends air of suitable temperature into the combustion furnace of the cracking furnace, thereby ensuring that the material can be completely cracked and no more carbon deposits will be generated.

[0100] Reference Figure 7 The step of obtaining the material distribution parameters of the preset cracking furnace includes: Step S700: controlling a preset material detection device to detect the material in the cracking furnace to generate a material detection signal characteristic.

[0101] Among them, the material detection device refers to a device used to detect the material concentration in different partitions in the cracking furnace. In this application, ultrasonic detection 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 propagation through the material.

[0102] Material detection signal characteristics refer to the signal characteristics after ultrasonic waves propagate through the material, including propagation time, amplitude attenuation and frequency change characteristics, which are obtained by the material detection device detecting materials in different partitions in the cracking furnace.

[0103] Step S701: determining the material detection concentration according to the material detection signal characteristics and a preset signal-material concentration relationship.

[0104] The signal-material concentration relationship refers to the corresponding relationship between the signal characteristics and the material concentration. The operator detects the material of known concentration and establishes a mapping table between the detection signal characteristics and the material concentration.

[0105] The material detection concentration refers to the material concentration detected in the cracking furnace, which is obtained by searching in a mapping table corresponding to the signal-material concentration relationship by the processing terminal according to the material detection signal characteristics.

[0106] Step S702: Obtain the device serial number corresponding to the material detection signal characteristics.

[0107] Among them, the device serial number refers to the serial number of the material detection device that detects the material detection signal characteristics, and is obtained by the processing terminal identifying the device serial number suffixed to the material detection signal.

[0108] Step S703: Determine the material partition according to the device serial number and the preset device partition relationship.

[0109] The device partition relationship refers to the correspondence between the material detection device and the cracking furnace partitions. The operator forms a mapping table by corresponding the serial numbers of the material detection devices installed in different partitions with the partitions.

[0110] The material partition refers to the partition to which the detected material concentration belongs, which is found by the processing terminal in the mapping table corresponding to the device partition relationship according to the device serial number.

[0111] Step S704: Associating material partitions and material detection concentrations to generate material distribution parameters.

[0112] Among them, the material distribution parameters in this step are consistent with the material distribution parameters in step S500. The processing terminal associates the material detection concentration with the corresponding material partition to generate the material distribution situation of the partition, and finally integrates the material distribution situations of all partitions to form the material distribution parameters.

[0113] Based on the same inventive concept, the embodiment of the present application provides an air preheater control system, including: An acquisition module is used to obtain a preheating trigger signal, a required preheating temperature, an outlet hot air temperature, a valve serial number, material distribution parameters and a device serial number; A memory for storing a program of an air preheater control method; The program in the memory can be loaded and executed by the processor to implement an air preheater control method.

[0114] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, 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 process of the above-described system, device and unit can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0115] An embodiment of the present application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed by a method for controlling an air preheater.

[0116] Computer storage media include, for example, various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0117] Based on the same inventive concept, an embodiment of the present application provides an intelligent terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute an air preheater control method.

[0118] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, 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 process of the above-described system, device and unit can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0119] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. An air preheater control method, characterized in that: include: Obtaining a preheating trigger signal of an air preheater; Obtaining 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 relationship between the required preheating temperature and the preset temperature opening; Control the preset pipeline system according to the valve opening to send hot water to the air preheater and obtain the outlet hot air temperature of the air preheater; According to the outlet hot air temperature and the required preheating temperature, the pipeline system is controlled to continue to send hot water to the air preheater.

2. The air preheater control method according to claim 1, characterized in that: The steps of controlling the piping system to continue to deliver hot water to the air preheater according to the outlet hot air temperature and the preheating temperature include: Determine whether the outlet hot air temperature meets the preheating temperature requirements; If it meets the requirements, the pipeline system will continue to be controlled according to the valve opening to send hot water to the air preheater, and the outlet hot air temperature of the air preheater will continue to be obtained for circulation judgment; If it does not meet the requirements, the difference between the outlet hot air temperature and the required preheating temperature is calculated, and the calculated difference is defined as the required adjustment temperature; The temperature control pipeline system continues to send hot water to the air preheater according to the need to adjust, and continues to obtain the outlet hot air temperature of the air preheater for circulation judgment.

3. The air preheater control method according to claim 2, characterized in that: The steps to adjust the temperature control piping system to continue to send hot water to the air preheater as needed include: Analyze the temperature that needs to be adjusted to determine the direction of the opening adjustment of the pipeline system; Determine the adjustment opening of the pipeline system according to the relationship between the temperature to be adjusted and the preset temperature adjustment opening; The pipe system is adjusted according to the opening adjustment direction and the opening adjustment, and the adjusted pipe system is controlled to send hot water to the air preheater.

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

5. An air preheater control method according to any one of claims 1 to 4, characterized in that: After the piping system delivers the hot water to the air preheater, it also includes a zone preheating step, which includes: Obtaining material distribution parameters of a preset cracking furnace; Determine whether the material distribution parameters meet the requirements of the preset benchmark distribution parameters; If it meets the requirements, the pipeline system will continue to be controlled to send hot water to the air preheater, and the material distribution parameters of the cracking furnace will continue to be obtained for circulation judgment; If it does not meet the requirements, the pipeline system will be controlled to send hot water to the air preheater according to the material distribution parameters.

6. The air preheater control method according to claim 5, characterized in that: The steps of controlling the piping system to deliver hot water to the air preheater according to the material distribution parameters include: Analyze the material distribution parameters and the reference distribution parameters to determine the material abnormal distribution parameters; Analyze the abnormal distribution parameters of materials to determine the abnormal distribution zones; Determine and adjust the valve sequence number according to the abnormal distribution partition and the preset partition valve relationship; Analyze the material abnormal distribution parameters and the benchmark distribution parameters to determine the material difference parameters; Analyze material difference parameters to determine the partition adjustment direction; Determine the partition adjustment opening according to the material difference parameter and the preset difference parameter opening relationship; According to the zone adjustment direction and the zone adjustment opening, the opening of the valve corresponding to the adjustment valve serial number in the pipeline system is adjusted, and the adjusted pipeline system is controlled to send hot water to the air preheater.

7. The air preheater control method according to claim 6, characterized in that: The steps of obtaining the material distribution parameters of the preset cracking furnace include: Controlling a preset material detection device to detect the material in the cracking furnace to generate a material detection signal characteristic; Determine the material detection concentration according to the material detection signal characteristics and the preset signal-material concentration relationship; Obtaining the device serial number corresponding to the material detection signal characteristic; Determine the material partition according to the device serial number and the preset device partition relationship; Associate material partitions and material detection concentrations to generate material distribution parameters.

8. An air preheater control system, characterized in that: include: An acquisition module is used to obtain a preheating trigger signal, a required preheating temperature, and an outlet hot air temperature; A memory for storing a program of an air preheater control method according to any one of claims 1 to 7; 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 claims 1 to 7.

9. An intelligent terminal, characterized in that: The invention comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes an air preheater control method as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: A computer program is stored which can be loaded by a processor and executes an air preheater control method according to any one of claims 1 to 7.

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