Vertical storage tank electric heating control method and system

Abstract

The application discloses a vertical storage tank electric heating control method and system, comprising: dividing the vertical storage tank into a plurality of main heating areas and a plurality of auxiliary heating areas; when any main heating area is heated by a first electric heater, a first current temperature value of the main heating area is obtained, and it is judged whether the first current temperature value exceeds a first preset temperature value; if yes, the first electric heater of the main heating area is controlled to stop heating or the power of the first electric heater of the main heating area is controlled according to a PID algorithm to adjust the temperature to a target temperature range; or / and when any auxiliary heating area is heated by a second electric heater, a second current temperature value of the auxiliary heating area is obtained, and it is judged whether the second current temperature value exceeds a second preset temperature value; if yes, the second electric heater of the auxiliary heating area is controlled to stop heating. The application can control electric heating of different areas of the vertical storage tank, and improves the stability and safety of the vertical storage tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric heating, in particular to a vertical storage tank electric heating control method and system. BACKGROUND

[0002] At present, some occasions need to heat the vertical storage tank to high temperature, such as hydrogen sulfide reactor, which needs external heat to heat the sulfur to 350℃, and then starts to run. Therefore, one or even several heaters that meet the heating requirements need to be used. These heaters usually have high power, and the power distribution and control of these heaters need to be performed.

[0003] However, there is currently a lack of separate heating control for different areas of the vertical storage tank. Therefore, there is an urgent need to provide a technical solution to solve the above technical problems. SUMMARY

[0004] To solve the above technical problems, the present application provides a vertical storage tank electric heating control method and system.

[0005] The technical scheme of a vertical storage tank electric heating control method of the present application is as follows:

[0006] The vertical storage tank to be controlled is divided into a plurality of main heating areas and a plurality of auxiliary heating areas; wherein each main heating area is heated by a first electric heater, and each auxiliary heating area is heated by a second electric heater;

[0007] When any main heating area is heated by the first electric heater, the first current temperature value of the main heating area is obtained, and it is judged whether the first current temperature value exceeds the first preset temperature value of the main heating area, to obtain a first judgment result. When the first judgment result is yes, the first electric heater corresponding to the main heating area is controlled to stop heating or the power of the first electric heater corresponding to the main heating area is controlled according to the PID algorithm to adjust the temperature to the target temperature range; or / and, when any auxiliary heating area is heated by the second electric heater, the second current temperature value of the auxiliary heating area is obtained, and it is judged whether the second current temperature value exceeds the second preset temperature value of the auxiliary heating area, to obtain a second judgment result. When the second judgment result is yes, the second electric heater corresponding to the auxiliary heating area is controlled to stop heating.

[0008] The beneficial effects of a vertical storage tank electric heating control method of the present application are as follows:

[0009] The method of the present application can control the electric heating of different areas of the vertical storage tank, thereby improving the stability and safety of the vertical storage tank.

[0010] On the basis of the above scheme, the vertical storage tank electric heating control method of the present application can be further improved as follows.

[0011] Further, each main heating area and each auxiliary heating area is correspondingly provided with a contactor, and the method further comprises:

[0012] turning on the contactor corresponding to any main heating area to enable the first electric heater of the main heating area to heat the main heating area, and turning on the contactor corresponding to any auxiliary heating area to enable the first electric heater of the auxiliary heating area to heat the main heating area.

[0013] Further, each main heating area is further correspondingly provided with a power regulator; and the step of adjusting the temperature of any main heating area to the target temperature range according to the PID algorithm comprises:

[0014] generating a target analog signal based on the PID algorithm and the first current temperature value of any main heating area, and sending the target analog signal to the power regulator corresponding to the main heating area, so that the power regulator controls the first electric heater corresponding to the main heating area to adjust the temperature of the main heating area to the target temperature range.

[0015] Further, the step of controlling the first electric heater corresponding to any main heating area to stop heating comprises:

[0016] turning off the contactor corresponding to the main heating area to enable the first electric heater of the main heating area to stop heating the main heating area;

[0017] The step of controlling the second electric heater corresponding to any auxiliary heating area to stop heating comprises:

[0018] turning off the contactor corresponding to the auxiliary heating area to enable the second electric heater of the auxiliary heating area to stop heating the auxiliary heating area.

[0019] Further, the surface of any first electric heater is provided with at least one first temperature sensor, and the surface of any second electric heater is provided with at least one second temperature sensor; and the step of obtaining the first current temperature value of any main heating area comprises:

[0020] obtaining the current temperature value collected by each first temperature sensor provided on the first electric heater corresponding to the main heating area, and determining the maximum value of all current temperature values corresponding to the main heating area as the first current temperature value of the main heating area;

[0021] The step of obtaining the second current temperature value of any auxiliary heating area comprises:

[0022] Acquire the current temperature value collected by each second temperature sensor arranged on the second electric heater corresponding to any auxiliary heating area, and determine the maximum of all current temperature values corresponding to the auxiliary heating area as the second current temperature value of the auxiliary heating area.

[0023] Further, the outer surface of the vertical storage tank to be controlled is provided with at least one third temperature sensor, each third temperature sensor being used to acquire the current temperature value of the outer surface of the vertical storage tank to be controlled; the method further comprises:

[0024] receiving and determining the third current temperature value of the vertical storage tank to be controlled according to the current temperature value acquired by each third temperature sensor;

[0025] When the temperature difference between the first current temperature value of any main heating area and the third current temperature value exceeds the first threshold value, the first electric heater corresponding to the main heating area is controlled to stop heating; or / and when the temperature difference between the second current temperature value of any auxiliary heating area and the third current temperature value exceeds the second threshold value, the second electric heater corresponding to the auxiliary heating area is controlled to stop heating.

[0026] Further, the first electric heater is an MI electric heat tracing tape, and the second electric heater is an electric heating rope.

[0027] Further, the vertical storage tank to be controlled is a hydrogen sulfide reaction tank.

[0028] The technical scheme of a vertical storage tank electric heating control system of the present application is as follows:

[0029] comprises a processing module and a control module;

[0030] The processing module is used to divide the vertical storage tank to be controlled into a plurality of main heating areas and a plurality of auxiliary heating areas; wherein each main heating area is heated by a first electric heater, and each auxiliary heating area is heated by a second electric heater;

[0031] The control module is used for: when any main heating area is heated by the first electric heater, acquiring a first current temperature value of the main heating area, and judging whether the first current temperature value exceeds a first preset temperature value of the main heating area to obtain a first judgment result; when the first judgment result is yes, controlling the first electric heater corresponding to the main heating area to stop heating or controlling the power of the first electric heater corresponding to the main heating area according to a PID algorithm to adjust the temperature to a target temperature range; or / and when any auxiliary heating area is heated by the second electric heater, acquiring a second current temperature value of the auxiliary heating area, and judging whether the second current temperature value exceeds a second preset temperature value of the auxiliary heating area to obtain a second judgment result; when the second judgment result is yes, controlling the second electric heater corresponding to the auxiliary heating area to stop heating.

[0032] The vertical storage tank electric heating control system has the following beneficial effects:

[0033] The system can control the electric heating of different areas of the vertical storage tank, and improves the stability and safety of the vertical storage tank.

[0034] On the basis of the above-mentioned scheme, the vertical storage tank electric heating control system can be further improved as follows.

[0035] Further, one contactor is arranged corresponding to each main heating area and each auxiliary heating area, and the system further comprises: a preprocessing module;

[0036] The contactor corresponding to any main heating area is turned on to enable the first electric heater of the main heating area to heat the main heating area, and the contactor corresponding to any auxiliary heating area is turned on to enable the first electric heater of the auxiliary heating area to heat the main heating area. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 A flowchart of an embodiment of a vertical storage tank electric heating control method provided by the application is shown;

[0038] Figure 2 A structural diagram of a vertical storage tank to be controlled in an embodiment of a vertical storage tank electric heating control method provided by the application is shown;

[0039] Figure 3 An electric heating control principle diagram in an embodiment of a vertical storage tank electric heating control method provided by the application is shown;

[0040] Figure 4 A structural diagram of an embodiment of a vertical storage tank electric heating control system provided by the application is shown. Detailed Implementation

[0041] Figure 1 A schematic flowchart illustrating an embodiment of the electric heating control method for vertical storage tanks provided by the present invention is shown. Figure 1 As shown, the method includes the following steps:

[0042] Step 110: Divide the vertical storage tank to be controlled into multiple main heating zones and multiple auxiliary heating zones.

[0043] Each main heating zone is heated by a first electric heater, and each auxiliary heating zone is heated by a second electric heater.

[0044] In this embodiment, ① the vertical storage tank to be controlled is a hydrogen sulfide reaction tank. Other tanks can be selected according to requirements; no restrictions are set here. ② The main heating area is the area primarily used for the chemical reaction. ③ The auxiliary heating area is the area that assists in the chemical reaction. ④ The first electric heater is an MI electric heating tape; the second electric heater is an electric heating rope.

[0045] Specifically, the controller (PLC) divides the vertical storage tank to be controlled into multiple main heating zones and multiple auxiliary heating zones, and connects to each heating zone (main heating zone or auxiliary heating zone) respectively.

[0046] It should be noted that: ① The parameters of the electric heating rope are: approximately 50m in length, 4mm in diameter, 6158W power, 220VAC. ② The parameters of the MI electric heating tape are: 6kW power per tape, surface temperature withstand capability up to 1200 degrees Fahrenheit (648.9 degrees Celsius), each tape is bent into a U-shape, each hot wire is approximately 3.5 meters long, and each cold wire is approximately 0.355 meters long. ③ As... Figure 2 As shown, the vertical storage tank in this embodiment has an outer diameter of 4000mm and a height of 5830mm. The heating area includes: the upper end cap of the tank, the vertical tank body, and the lower end cap of the tank. In this embodiment, the vertical storage tank to be controlled is divided into 9 groups of areas; groups 1, 2, 3, 4, 8, and 9 are the main heating areas, and groups 5, 6, and 7 are the auxiliary heating areas.

[0047] Step 120: When any primary heating area is heated by the first electric heater, a first current temperature value of the primary heating area is obtained, and it is determined whether the first current temperature value exceeds a first preset temperature value of the primary heating area, to obtain a first determination result; when the first determination result is yes, the first electric heater corresponding to the primary heating area is controlled to stop heating or the power of the first electric heater corresponding to the primary heating area is controlled according to a PID algorithm, so that the temperature is adjusted to a target temperature range; or / and when any auxiliary heating area is heated by the second electric heater, a second current temperature value of the auxiliary heating area is obtained, and it is determined whether the second current temperature value exceeds a second preset temperature value of the auxiliary heating area, to obtain a second determination result; when the second determination result is yes, the second electric heater corresponding to the auxiliary heating area is controlled to stop heating.

[0048] Wherein, ① the first current temperature value is a current temperature value of the primary heating area. ② the first preset temperature value is a preset warning temperature value of the primary heating area, such as 100℃. ③ the target temperature range is a reasonable temperature range corresponding to the primary heating area, such as 80-90℃. ④ the second current temperature value is a current temperature value of the auxiliary heating area. ⑤ the second preset temperature value is a preset warning temperature value of the auxiliary heating area.

[0049] Specifically, when any primary heating area is heated by the first electric heater, the PLC obtains a first current temperature value of the primary heating area, and determines whether the first current temperature value exceeds a first preset temperature value of the primary heating area, to obtain a first determination result; when the first determination result is yes, the first electric heater corresponding to the primary heating area is controlled to stop heating or the power of the first electric heater corresponding to the primary heating area is controlled according to a PID algorithm, so that the temperature is adjusted to a target temperature range. Or / and, when any auxiliary heating area is heated by the second electric heater, the PLC obtains a second current temperature value of the auxiliary heating area, and determines whether the second current temperature value exceeds a second preset temperature value of the auxiliary heating area, to obtain a second determination result; when the second determination result is yes, the second electric heater corresponding to the auxiliary heating area is controlled to stop heating.

[0050] Preferably, each primary heating area and each auxiliary heating area is provided with a contactor.

[0051] Wherein, when the contactor is turned on (powered on), the corresponding electric heater is started; when the contactor is turned off, the corresponding electric heater is turned off.

[0052] The method further comprises:

[0053] The contactor corresponding to any of the main heating areas is turned on to make the first electric heater of the main heating area heat the main heating area, and the contactor corresponding to any of the auxiliary heating areas is turned on to make the first electric heater of the auxiliary heating area heat the main heating area.

[0054] Specifically, as shown in Figure 3 When the circuit breaker is closed, the PLC drives the intermediate relay through DO output to turn on the contactor corresponding to any of the main heating areas (the coil is powered), make the first electric heater of the main heating area heat the main heating area, and turn on the contactor corresponding to any of the auxiliary heating areas to make the first electric heater of the auxiliary heating area heat the main heating area.

[0055] Preferably, each main heating area is also provided with a power regulator corresponding thereto; the step of adjusting the temperature of any of the main heating areas to the target temperature range by the first electric heater corresponding to the main heating area according to the PID algorithm comprises:

[0056] Based on the PID algorithm and the first current temperature value of any of the main heating areas, a target analog signal is generated and sent to the power regulator corresponding to the main heating area, so that the power regulator controls the first electric heater corresponding to the main heating area to adjust the temperature of the main heating area to the target temperature range.

[0057] Preferably, the current of the power regulator is 4-20 mA.

[0058] Specifically, the PLC receives the first current temperature value of any of the main heating areas, and performs calculation by using the PID algorithm to generate a corresponding analog signal and send it to the power regulator corresponding to the main heating area, so that the power regulator outputs corresponding power according to the analog signal to adjust the temperature of the main heating area to the target temperature range.

[0059] It should be noted that the process of generating an analog signal by using the PID algorithm is a prior art, which will not be described in detail here.

[0060] Preferably, the step of controlling the first electric heater corresponding to any of the main heating areas to stop heating comprises:

[0061] The contactor corresponding to any of the main heating areas is turned off to make the first electric heater of the main heating area stop heating the main heating area.

[0062] Specifically, the PLC turns off the contactor corresponding to any of the main heating areas to make the first electric heater of the main heating area stop heating the main heating area.

[0063] The step of controlling the second electric heater corresponding to any of the auxiliary heating areas to stop heating comprises:

[0064] The contactor corresponding to any auxiliary heating area is disconnected to stop the second electric heater of the auxiliary heating area from heating the auxiliary heating area.

[0065] Specifically, the PLC disconnects the contactor corresponding to any auxiliary heating area to stop the second electric heater of the auxiliary heating area from heating the auxiliary heating area.

[0066] Preferably, the surface of any first electric heater is provided with at least one first temperature sensor, and the surface of any second electric heater is provided with at least one second temperature sensor.

[0067] Wherein, ① the first temperature sensor is a temperature sensor provided on the first electric heater corresponding to the main heating area. ② the second temperature sensor is a temperature sensor provided on the second electric heater corresponding to the auxiliary heating area. ③ the type of any temperature sensor is a thermocouple. ④ two temperature sensors are provided by default for each heating area, and the number of temperature sensors can also be set according to requirements, which is not limited herein.

[0068] The step of obtaining the first current temperature value of any main heating area includes:

[0069] The current temperature value collected by each first temperature sensor provided on the first electric heater corresponding to the main heating area is obtained, and the maximum of all the current temperature values corresponding to the main heating area is determined as the first current temperature value of the main heating area.

[0070] Specifically, the PLC obtains the current temperature values collected by two first temperature sensors provided on the first electric heater corresponding to the main heating area, and determines the maximum of the two current temperature values corresponding to the main heating area as the first current temperature value of the main heating area. For example, the current temperature value collected by one first temperature sensor of any main heating area is 100℃, and the current temperature value collected by another first temperature sensor is 90℃, then the first current temperature value of the main heating area is 95℃.

[0071] The step of obtaining the second current temperature value of any auxiliary heating area includes:

[0072] The current temperature value collected by each second temperature sensor provided on the second electric heater corresponding to the auxiliary heating area is obtained, and the maximum of all the current temperature values corresponding to the auxiliary heating area is determined as the second current temperature value of the auxiliary heating area.

[0073] Specifically, the PLC acquires current temperature values collected by two second temperature sensors arranged on the second electric heater corresponding to any auxiliary heating area, and determines the maximum of the two current temperature values corresponding to the auxiliary heating area as the second current temperature value of the auxiliary heating area. For example, one of the second temperature sensors collects a current temperature value of 60℃, and the other second temperature sensor collects a current temperature value of 70℃, and the second current temperature value of the auxiliary heating area is 65℃.

[0074] Preferably, the outer surface of the vertical storage tank to be controlled is provided with at least one third temperature sensor, and each third temperature sensor is used to collect a current temperature value of the outer surface of the vertical storage tank to be controlled.

[0075] In this embodiment, six single-branch 8-point thermocouples are evenly distributed around the vertical storage tank to be controlled, and two single-branch 4-point thermocouples are evenly distributed to heat the lower head of the tank to collect the temperature of the vertical storage tank to be controlled.

[0076] The method further comprises:

[0077] receiving and determining, according to the current temperature value collected by each third temperature sensor, a third current temperature value of the vertical storage tank to be controlled.

[0078] The third current temperature value is the temperature value of the outer surface of the vertical storage tank to be controlled.

[0079] Specifically, the PLC receives the current temperature value collected by each third temperature sensor, and determines the maximum of the current temperature values collected by all third temperature sensors as the third current temperature value of the vertical storage tank to be controlled.

[0080] It should be noted that the third current temperature value can be determined according to the maximum of the current temperature values collected by each temperature sensor, or can be determined according to a preset algorithm, which is not limited herein.

[0081] When the temperature difference between the first current temperature value of any main heating area and the third current temperature value exceeds a first threshold value, the first electric heater corresponding to the main heating area is controlled to stop heating; or / and when the temperature difference between the second current temperature value of any auxiliary heating area and the third current temperature value exceeds a second threshold value, the second electric heater corresponding to the auxiliary heating area is controlled to stop heating.

[0082] The first threshold value and the second threshold value are set to 50℃ by default, and can be set according to requirements, and the two threshold values can be the same or different, which is not limited herein.

[0083] In addition, it should be noted that ① for the main heating area, the temperature adjustment adopts silicon controlled adjustment (i.e. power regulator), and for the auxiliary heating area, the temperature adjustment adopts switch adjustment. ② In the embodiment, the vertical storage tank to be controlled is divided into 9 groups, and the number of corresponding electric heaters and the power and other parameters of each group are shown in Table 1 (the parameter table of the vertical storage tank to be controlled). ③ The devices, lines and controllers (PLC) mentioned in the embodiment can be arranged in the control cabinet, or can be arranged separately. For example, the entire electric heating control system can be divided into three layers. The first layer is the bottom layer equipment such as electric heaters and temperature sensors (thermocouples). The second layer is the power distribution sub-box and the signal distribution sub-box. The third layer is the power distribution room electrical control cabinet (PLC). ④ The PLC and each temperature sensor transmit data through RS-485 serial signals. ⑤ The number of PLCs can be multiple, that is, one is the main PLC and the others are standby. When the main PLC fails, it can be switched to the standby PLC to ensure the stability of communication. ⑥ The PLC can also be connected with the upper computer to upload and store relevant data.

[0084] Table 1:

[0085]

[0086] The technical scheme of the embodiment can control the electric heating of different areas of the vertical storage tank, thereby improving the stability and safety of the vertical storage tank.

[0087] Figure 4 An embodiment of a vertical storage tank electric heating control system provided by the application is shown in the structure schematic diagram. As shown in Figure 4 The system 200 includes a processing module 210 and a control module 220.

[0088] The processing module 210 is configured to divide the vertical storage tank to be controlled into a plurality of main heating areas and a plurality of auxiliary heating areas. Each main heating area is heated by a first electric heater, and each auxiliary heating area is heated by a second electric heater.

[0089] The control module 220 is configured to: when any main heating area is heated by the first electric heater, acquire a first current temperature value of the main heating area, and determine whether the first current temperature value exceeds a first preset temperature value of the main heating area, to obtain a first determination result; when the first determination result is yes, control the first electric heater corresponding to the main heating area to stop heating or control the first electric heater corresponding to the main heating area to adjust the temperature to a target temperature range according to a PID algorithm; or / and when any auxiliary heating area is heated by the second electric heater, acquire a second current temperature value of the auxiliary heating area, and determine whether the second current temperature value exceeds a second preset temperature value of the auxiliary heating area, to obtain a second determination result; when the second determination result is yes, control the second electric heater corresponding to the auxiliary heating area to stop heating.

[0090] Preferably, one contactor is arranged in correspondence with each main heating area and each auxiliary heating area, and the system 200 further comprises a preprocessing module.

[0091] The contactor corresponding to any main heating area is turned on, so that the first electric heater of the main heating area heats the main heating area, and the contactor corresponding to any auxiliary heating area is turned on, so that the first electric heater of the auxiliary heating area heats the main heating area.

[0092] The technical solution of the embodiment can control the electric heating of different areas of the vertical storage tank, and improve the stability and safety of the vertical storage tank.

[0093] The above steps of implementing the functions of the parameters and the modules in the vertical storage tank electric heating control system 200 according to the embodiment can refer to the parameters and steps in the above embodiment of the vertical storage tank electric heating control method, and will not be repeated here.

[0094] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the application can be practiced without these specific details. Similarly, in order to simplify the application and help understand one or more of the various inventive aspects, in the above description of the exemplary embodiments of the application, the various features of the embodiments of the application are sometimes grouped together into a single embodiment, figure, or description thereof. Among them, the claims following the detailed description are hereby expressly incorporated into the detailed description, wherein each claim itself is a separate embodiment of the application.

[0095] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps other than those listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices, apparatuses or means can be listed, comprising means for carrying out a certain task. The use of the term'means' in a claim is intended to refer to a combination of devices, apparatuses or means for carrying out a task. The word 'first','second', 'third', etc. do not imply any order. The use of these terms is to be construed as an indication of particular embodiments. Steps in the above-described embodiments, unless otherwise specified, are not to be construed as necessarily limiting the order in which the steps are performed.

Claims

1. A vertical storage tank electric heating control method, characterized by, The method comprises the following steps: dividing a vertical storage tank to be controlled into a plurality of main heating areas and a plurality of auxiliary heating areas; wherein each main heating area is heated by a first electric heater, and each auxiliary heating area is heated by a second electric heater; when any main heating area is heated by the first electric heater, a first current temperature value of the main heating area is obtained, and it is determined whether the first current temperature value exceeds a first preset temperature value of the main heating area, to obtain a first determination result; when the first determination result is yes, a first electric heater corresponding to the main heating area is controlled to stop heating or the power of the first electric heater corresponding to the main heating area is controlled according to a PID algorithm to adjust the temperature to a target temperature range; or / and when any auxiliary heating area is heated by the second electric heater, a second current temperature value of the auxiliary heating area is obtained, and it is determined whether the second current temperature value exceeds a second preset temperature value of the auxiliary heating area, to obtain a second determination result; when the second determination result is yes, a second electric heater corresponding to the auxiliary heating area is controlled to stop heating; a surface of any first electric heater is provided with at least one first temperature sensor, and a surface of any second electric heater is provided with at least one second temperature sensor; the step of obtaining the first current temperature value of any main heating area comprises the following steps: obtaining a current temperature value collected by each first temperature sensor arranged on the first electric heater corresponding to the main heating area, and determining a maximum value of all current temperature values corresponding to the main heating area as the first current temperature value of the main heating area; the step of obtaining the second current temperature value of any auxiliary heating area comprises the following steps: obtaining a current temperature value collected by each second temperature sensor arranged on the second electric heater corresponding to the auxiliary heating area, and determining a maximum value of all current temperature values corresponding to the auxiliary heating area as the second current temperature value of the auxiliary heating area; an outer surface of the vertical storage tank to be controlled is provided with at least one third temperature sensor, and each third temperature sensor is used to collect a current temperature value of the outer surface of the vertical storage tank to be controlled; the method further comprises the following steps: receiving and determining a third current temperature value of the vertical storage tank to be controlled according to the current temperature value collected by each third temperature sensor; when a temperature difference between the first current temperature value of any main heating area and the third current temperature value exceeds a first threshold value, the first electric heater corresponding to the main heating area is controlled to stop heating; or / and when a temperature difference between the second current temperature value of any auxiliary heating area and the third current temperature value exceeds a second threshold value, the second electric heater corresponding to the auxiliary heating area is controlled to stop heating; the first electric heater is an MI electric heat tracing tape, the second electric heater is an electric heating rope, and the vertical storage tank to be controlled is a hydrogen sulfide reaction tank.

2. The vertical storage tank electric heating control method according to claim 1, characterized by, each main heating area and each auxiliary heating area is provided with a corresponding contactor, and the method further comprises the following steps: The contactor corresponding to any of the main heating areas is turned on to make the first electric heater of the main heating area heat the main heating area, and the contactor corresponding to any of the auxiliary heating areas is turned on to make the first electric heater of the auxiliary heating area heat the main heating area.

3. The vertical storage tank electric heating control method according to claim 2, characterized by, Each main heating area is also provided with a power regulator; the step of adjusting the temperature of any main heating area to the target temperature range according to the PID algorithm includes: Based on the PID algorithm and the first current temperature value of any main heating area, a target analog signal is generated and sent to the power regulator corresponding to the main heating area, so that the power regulator controls the first electric heater corresponding to the main heating area to adjust the temperature of the main heating area to the target temperature range.

4. The vertical storage tank electric heating control method according to claim 2, characterized by, The step of controlling the first electric heater corresponding to any main heating area to stop heating includes: The contactor corresponding to any of the main heating areas is turned off to make the first electric heater of the main heating area stop heating the main heating area; The step of controlling the second electric heater corresponding to any auxiliary heating area to stop heating includes: The contactor corresponding to any of the auxiliary heating areas is turned off to make the second electric heater of the auxiliary heating area stop heating the auxiliary heating area.

5. An electric heating control system for a vertical storage tank, characterized by, It includes: A processing module and a control module; The processing module is used to divide the vertical storage tank to be controlled into a plurality of main heating areas and a plurality of auxiliary heating areas; wherein each main heating area is heated by a first electric heater, and each auxiliary heating area is heated by a second electric heater; The control module is used to: when any main heating area is heated by the first electric heater, acquire the first current temperature value of the main heating area, and judge whether the first current temperature value exceeds the first preset temperature value of the main heating area to obtain a first judgment result; when the first judgment result is yes, control the first electric heater corresponding to the main heating area to stop heating or control the power of the first electric heater corresponding to the main heating area according to the PID algorithm to adjust the temperature to the target temperature range; or / and, when any auxiliary heating area is heated by the second electric heater, acquire the second current temperature value of the auxiliary heating area, and judge whether the second current temperature value exceeds the second preset temperature value of the auxiliary heating area to obtain a second judgment result; when the second judgment result is yes, control the second electric heater corresponding to the auxiliary heating area to stop heating; The surface of any first electric heater is provided with at least one first temperature sensor, and the surface of any second electric heater is provided with at least one second temperature sensor; the control module is specifically used for: Acquire the current temperature value collected by each first temperature sensor arranged on the first electric heater corresponding to any main heating area, and determine the maximum value of all current temperature values corresponding to the main heating area as the first current temperature value of the main heating area; acquire a current temperature value collected by each second temperature sensor arranged on the second electric heater corresponding to any auxiliary heating area, and determine a maximum value of all current temperature values corresponding to the auxiliary heating area as a second current temperature value of the auxiliary heating area; an outer surface of the to-be-controlled vertical storage tank is provided with at least one third temperature sensor, each third temperature sensor is used to acquire a current temperature value of the outer surface of the to-be-controlled vertical storage tank; and the control module is further used to: receive and determine a third current temperature value of the to-be-controlled vertical storage tank according to the current temperature value collected by each third temperature sensor; when a temperature difference between the first current temperature value of any main heating area and the third current temperature value exceeds a first threshold value, control the first electric heater corresponding to the main heating area to stop heating; or / and when a temperature difference between the second current temperature value of any auxiliary heating area and the third current temperature value exceeds a second threshold value, control the second electric heater corresponding to the auxiliary heating area to stop heating; the first electric heater is an MI electric heat tracing band, the second electric heater is an electric heating rope, and the to-be-controlled vertical storage tank is a hydrogen sulfide reaction tank.

6. The vertical storage tank electric heating control system of claim 5, wherein, one contactor is arranged corresponding to each main heating area and each auxiliary heating area, and the system further comprises a pretreatment module; the pretreatment module is used to: turn on the contactor corresponding to any main heating area to enable the first electric heater of the main heating area to heat the main heating area, and turn on the contactor corresponding to any auxiliary heating area to enable the first electric heater of the auxiliary heating area to heat the main heating area.

Images