A control method and device of a heating furnace deaerator and an electronic device

Abstract

The application discloses a kind of heating furnace deaerator control method, device and electronic equipment, including obtaining the actual liquid level of deaerator and the target liquid level of deaerator pre-set;Based on the actual liquid level of deaerator and the target liquid level of deaerator pre-set, the opening of deaerator water supply regulating valve is determined, so that the actual liquid level of deaerator and the target liquid level of deaerator pre-set are consistent;Obtain the actual water supply flow of deaerator and the actual pressure value of deaerator and pre-set target pressure;Based on the actual water supply flow of deaerator, the adjustment parameter of deaerator pressure controller is determined, so that the actual pressure of deaerator and the target pressure pre-set are consistent, the deviation value of target liquid level and actual liquid level of deaerator is large in the application, and water is quickly supplied to the case, and the deviation value of target liquid level and actual liquid level of deaerator is small in the case Slowly water is supplied, the stable operation of entire vaporization system, reach the efficiency of deoxygenation.

Description

Technical Field

[0001] This invention belongs to the technical field of deaerator level control, and particularly relates to a control method, device and electronic equipment for a heating furnace deaerator. Background Technology

[0002] In the metallurgical industry, the heating furnace is the first process in the hot rolling production line, and the performance of the heated slab directly affects the slab rolling process and the quality of the finished product. The walking beam of the heating furnace adopts vaporization cooling, which is both energy-saving and achieves good heating quality, making it a preferred cooling method for in-furnace water beams. The deaerator's function is to supply deoxygenated brine to the steam drum in the vaporization cooling system, preventing corrosion of the in-furnace water beams and ensuring the safe operation of the equipment. Stable operation of the deaerator is crucial. Drastic fluctuations in deaerator makeup water lead to drastic fluctuations in deaerator pressure and temperature, affecting not only the deaeration effect but also the water level and pressure in the steam drum, thus impacting the stability of the entire vaporization system. This invention optimizes the deaerator control system to achieve stable control of the deaerator's liquid level, pressure, and temperature, thereby achieving stable operation of the entire vaporization cooling system and achieving significant control effects. It can solve the imbalance in the vaporization system caused by the imbalance between deaerator makeup water and steam drum makeup water.

[0003] In actual production, fluctuations in production load occur. When the furnace load is high, the furnace temperature is high, the steam production from the steam drum increases, requiring more makeup water, and simultaneously increasing the water output from the deaerator. Conversely, when the furnace load is low, the furnace temperature is low, the steam production from the steam drum decreases, requiring less makeup water, and simultaneously decreasing the water output from the deaerator. Due to changes in production rhythm and steel grade, the furnace load fluctuates significantly, placing higher demands on the makeup water control system of the vaporization system. Summary of the Invention

[0004] This invention provides a control method, device, and electronic equipment for a deaerator in a heating furnace. By rapidly replenishing water when the deviation between the target liquid level and the actual liquid level of the deaerator is large, and slowly replenishing water when the deviation is small, the stable operation of the entire vaporization system is achieved, thus achieving the deaeration effect.

[0005] In a first aspect, this application provides the following technical solution through an embodiment:

[0006] A method for controlling a deaerator in a heating furnace includes:

[0007] The actual liquid level of the deaerator and the preset target liquid level of the deaerator are obtained, and the absolute value of the difference between the preset target liquid level of the deaerator and the actual liquid level of the deaerator is taken as the actual deviation value.

[0008] If the actual deviation value is greater than the preset deviation value, the opening degree of the deaerator's water supply regulating valve is controlled according to the first control mode.

[0009] If the actual deviation value is less than or equal to the preset deviation value, the opening degree of the deaerator's water supply regulating valve is controlled according to the second control mode.

[0010] In some embodiments, the control method further includes:

[0011] Obtain the actual makeup water flow rate and actual pressure value of the deaerator, as well as the preset target pressure;

[0012] Based on the actual water supply flow rate of the deaerator, the adjustment parameters of the deaerator's pressure controller are determined so that the actual pressure of the deaerator is consistent with the preset target pressure.

[0013] In some embodiments, determining the adjustment parameters of the deaerator's pressure controller based on the actual makeup water flow rate of the deaerator, so that the actual pressure of the deaerator matches the preset target pressure, includes:

[0014] Based on the actual water supply flow rate of the deaerator, determine whether the actual water supply flow rate is greater than the preset water supply flow rate threshold.

[0015] If the actual water supply flow rate is greater than the preset water supply flow rate threshold, the adjustment parameter of the pressure controller of the deaerator is the first adjustment parameter;

[0016] If the actual water supply flow rate is less than the preset water supply flow rate threshold, the pressure controller of the deaerator will be adjusted by a second adjustment parameter, which is less than the first adjustment parameter.

[0017] In some embodiments, if the actual deviation value is greater than a preset deviation value, then controlling the opening of the deaerator's water supply regulating valve according to the first control mode includes:

[0018] The target liquid level of the deaerator is used as the set value. By adjusting the opening of the deaerator water supply regulating valve, the actual liquid level of the deaerator is made to reach the target liquid level of the deaerator.

[0019] In some embodiments, if the actual deviation value is less than a preset deviation value, then controlling the opening of the deaerator's water supply regulating valve according to the second control mode includes:

[0020] Obtain the water flow rate at the deaerator outlet;

[0021] The actual deviation value is divided into multiple intervals, and a corresponding compensation flow is set for each interval;

[0022] The sum of the outlet flow rate of the deaerator and the compensation flow rate is used as the makeup flow rate of the deaerator, so that the actual liquid level of the deaerator reaches the preset target liquid level of the deaerator.

[0023] In some embodiments, the control method includes:

[0024] Throughout the entire deaerator pressure control process, the deaerator pressure regulating valve simultaneously controls the deaerator pressure and deaerator temperature.

[0025] In some embodiments, the control method further includes:

[0026] Throughout the entire deaerator pressure control process, the preset target pressure is 0.02 MPa, and the deaerator temperature is 104°C.

[0027] In some embodiments, setting a corresponding compensation flow rate for each interval, so that the target makeup water flow rate of the deaerator is the sum of the deaerator's outlet water flow rate and the corresponding compensation flow rate, includes:

[0028] When the target liquid level is greater than the actual liquid level, the compensation flow rate is positive;

[0029] When the target liquid level is lower than the actual liquid level, the compensation flow rate is negative.

[0030] Secondly, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0031] A control device for a deaerator in a heating furnace, characterized in that, when applied to the method described in any one of the above claims, it comprises:

[0032] The actual liquid level detection unit is used to obtain the actual liquid level inside the deaerator;

[0033] The water supply regulating valve opening determination unit is used to determine the opening of the water supply regulating valve in the deaerator as either the first mode or the second mode based on the actual deviation between the actual liquid level and the target liquid level in the deaerator.

[0034] The water supply regulating valve opening control unit is used to control the opening degree of the water supply regulating valve in the deaerator so that the actual liquid level in the deaerator is consistent with the preset target liquid level of the deaerator.

[0035] Thirdly, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0036] An electronic control device for a deaerator in a heating furnace, used in any of the methods described above, the electronic device comprising:

[0037] One or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, and the at least one piece of program code is loaded and executed by the one or more processors to implement the method described in any of the above embodiments.

[0038] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages:

[0039] This invention automatically switches between two control modes by comparing the actual deviation between the target liquid level and the actual liquid level with a preset deviation value: In the first mode, when the deviation between the actual liquid level and the target liquid level is large, liquid level control is the target to avoid the actual liquid level deviating from the target liquid level, resulting in extremely low or high liquid levels; In the second mode, when the deviation between the actual liquid level and the target liquid level is small, the water supply flow rate is the target to effectively avoid imbalance between deaerator water supply and deaerator effluent, or imbalance of the vaporization system caused by drastic fluctuations in water supply flow rate. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a flowchart of the control method in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the control device in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of the structure of the control electronic device in an embodiment of the present invention. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0045] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0046] In a first aspect, in an optional embodiment, see [link to previous section] Figure 1 As shown, a control method for a deaerator in a heating furnace is provided, comprising:

[0047] Obtain the actual liquid level of the deaerator and the preset target liquid level of the deaerator, and use the absolute value of the difference between the preset target liquid level of the deaerator and the actual liquid level of the deaerator as the actual deviation value.

[0048] If the actual deviation value is greater than the preset deviation value, the opening degree of the deaerator's water supply regulating valve will be controlled according to the first control mode.

[0049] If the actual deviation value is less than or equal to the preset deviation value, the opening degree of the deaerator's water supply regulating valve will be controlled according to the second control mode.

[0050] The beneficial effects of this invention are as follows: This invention automatically switches between two control modes by comparing the actual deviation between the target liquid level and the actual liquid level with a preset deviation value. In the first control mode, when the deviation between the actual liquid level and the target liquid level is large, liquid level control is the target to avoid the actual liquid level deviating from the target liquid level, resulting in extremely low or high liquid levels. In the second control mode, when the deviation between the actual liquid level and the target liquid level is small, water supply flow control is the target to effectively avoid imbalance between deaerator water supply and deaerator outlet water, or imbalance of the vaporization system caused by drastic fluctuations in water supply flow.

[0051] In some embodiments, the control method further includes:

[0052] Obtain the actual makeup water flow rate and actual pressure value of the deaerator, as well as the preset target pressure;

[0053] Based on the actual makeup water flow rate of the deaerator, determine the adjustment parameters of the deaerator's pressure controller to ensure that the actual pressure of the deaerator matches the preset target pressure.

[0054] Understandably, using the dynamic actual makeup water flow rate during deaerator level adjustment as feedforward for deaerator pressure control can effectively reduce the impact of makeup water flow rate changes on deaerator pressure and temperature. This allows for stable makeup water supply to the deaerator, ensuring stable control of deaerator level, pressure, and temperature. Simultaneously, it avoids the impact of drastic fluctuations in deaerator makeup water on steam drum level and pressure, preventing false water level readings in the steam drum and ensuring stable operation of the entire vaporization system to achieve deaeration.

[0055] In some embodiments, determining the adjustment parameters of the deaerator's pressure controller based on the actual makeup water flow rate of the deaerator, so that the actual pressure of the deaerator matches the preset target pressure, includes:

[0056] Based on the actual water supply flow rate of the deaerator, determine whether the actual water supply flow rate is greater than the preset water supply flow rate threshold.

[0057] If the actual water supply flow rate is greater than the preset water supply flow rate threshold, the adjustment parameter of the pressure controller of the deaerator is the first adjustment parameter;

[0058] If the actual water supply flow rate is less than the preset water supply flow rate threshold, the pressure controller of the deaerator will be adjusted by a second adjustment parameter, which is less than the first adjustment parameter.

[0059] Specifically, the steps for determining the adjustment degree of the pressure regulating valve are as follows:

[0060] Obtain the actual makeup water flow rate Q3 of the deaerator, and determine whether the actual makeup water flow rate Q3 is greater than the threshold Q. In this example, Q=18t / h. If yes, the proportional coefficient (first adjustment parameter) of the PID pressure controller P=600; if no, the proportional coefficient (second adjustment parameter) of the PID pressure controller P=800.

[0061] It is important to understand that when the deaerator makeup water flow rate is high, the pressure and temperature inside the deaerator will drop significantly due to the influence of cold water. By using the actual makeup water flow rate of the deaerator as feedforward and increasing the regulation rate of the pressure regulating valve, the impact of cold water on the pressure and temperature inside the deaerator can be reduced.

[0062] In some embodiments, if the actual deviation value is greater than a preset deviation value, the opening degree of the deaerator's water supply regulating valve is controlled according to the first control mode, including:

[0063] The target liquid level of the deaerator is used as the set value. By adjusting the opening of the deaerator water supply regulating valve, the actual liquid level of the deaerator is made to reach the target liquid level.

[0064] Understandably, in the first control mode, when the actual liquid level and the target liquid level deviate significantly, the liquid level control is the target, in order to avoid the actual liquid level deviating from the target liquid level and the liquid level becoming extremely low or extremely high. The liquid level can be quickly controlled within the controllable range, thereby enabling further stable regulation.

[0065] In some embodiments, if the actual deviation value is less than a preset deviation value, the opening degree of the deaerator's water supply regulating valve is controlled according to the second control mode, including:

[0066] Obtain the water flow rate at the deaerator outlet;

[0067] The actual deviation value is divided into multiple intervals, and a corresponding compensation flow is set for each interval;

[0068] The sum of the outlet flow rate and the compensation flow rate of the deaerator is used as the makeup water flow rate of the deaerator, so that the actual liquid level of the deaerator reaches the preset target liquid level of the deaerator.

[0069] Specifically, obtain the deaerator outlet water flow rate Q1, which is the steam drum makeup water flow rate;

[0070] Obtain the deviation value L1 between the target liquid level and the actual liquid level of the deaerator;

[0071] L1 is divided into Ni intervals according to the actual situation, with Ni=5. The five partitions are (-100, -50), (-50, -20), (-20, 20), (20, 50), and (50, 100).

[0072] Different compensation flows Ki are set for different ranges; Ki is -4, -2, 0, 5, and 8 respectively.

[0073] The target makeup water flow rate for the deaerator is Q2 = Q1 + Ki;

[0074] When L1∈(-100, -50), Q2= Q1-4;

[0075] When L1∈ [-50,-20), Q2= Q1-2;

[0076] When L1∈ [-20, 20], Q2= Q;

[0077] When L1∈ (20,50], Q2= Q1+5;

[0078] When L1∈(50,100), Q2= Q1+8;

[0079] The debugging steps are as follows:

[0080] Step 1: Set the deaerator's water supply flow regulating valve to manual mode, manually open it to a certain degree to bring the deaerator liquid level close to the target liquid level, and adjust the deaerator to operate in a steady state.

[0081] Step 2: Set the deaerator's makeup water flow rate to the deaerator's outlet water flow rate, which is the steam drum's makeup water flow rate. Set the deaerator's makeup water flow rate regulating valve to automatic mode and observe the liquid level operation status.

[0082] Step 3: If the liquid level is too high, assuming it is in the range of [-50, -20), the water supply flow rate needs to be reduced. Set the compensation flow rate Ki to -2 and observe the trend of the liquid level. If it can be stabilized within the required range, then select the compensation flow rate. If the liquid level continues to rise or fall, adjust the compensation flow rate and repeat the adjustment and testing.

[0083] Step 4: If the deaerator liquid level is under control, finely adjust the parameters of the liquid level controller;

[0084] Step 5: The debugging method for other partitions is the same.

[0085] Understandably, if the deaerator's makeup water volume is too high instantaneously, the deaerator's temperature and pressure will decrease, failing to achieve optimal deaeration. Simultaneously, the water temperature entering the steam drum will be too low, leading to a sudden drop in pressure and drastic fluctuations in liquid level within the steam drum, resulting in false water levels and malfunction of the vaporization control system. Conversely, if the deaerator's makeup water volume is too low, it cannot promptly supply the steam drum's needs, causing both the deaerator and steam drum liquid levels to be too low. Therefore, a second control mode is adopted. By using the sum of the deaerator's outlet water flow rate and the different compensation flow rates in different zones as the makeup water flow rate at the deaerator's makeup water end, the makeup water flow rate at the deaerator's makeup water end can be controlled to achieve a smooth and stable transition between the deaerator's makeup water end and the deaerator's outlet water end until an equilibrium is reached between the two.

[0086] In some embodiments, the control method includes:

[0087] Throughout the deaerator's pressure control process, the pressure regulating valve simultaneously controls both the deaerator's pressure and temperature. Understandably, this example omits a temperature controller, considering that the simultaneous operation of the pressure regulating valve and temperature controller would result in significant deaerator vibration due to their coupling. In this embodiment, the steam pipe entering the deaerator is located at the deaerator head, and the pressure regulating valve is located on this pipe. Steam enters the deaerator head through this pressure regulating valve to deoxygenate the water entering the deaerator head. Traditional deaerators, in addition to the steam pipe at the deaerator head, also have another steam pipe in the lower middle section of the deaerator, with a temperature control valve located on this pipe. Steam enters the deaerator through this temperature control valve to heat the demineralized water in the deaerator, which increases deaerator vibration and is detrimental to stable operation.

[0088] In some embodiments, the control method further includes:

[0089] Throughout the deaerator pressure control process, the preset target pressure is 0.02 MPa and the deaerator temperature is 104°C. It should be understood that when the steam in the deaerator is saturated, the deaerator pressure and temperature are directly related.

[0090] In some embodiments, a corresponding compensation flow rate is set for each interval so that the target makeup water flow rate of the deaerator is the sum of the deaerator's outlet water flow rate and the corresponding compensation flow rate, including:

[0091] When the target liquid level is greater than the actual liquid level, the compensation flow rate is positive.

[0092] When the target liquid level is lower than the actual liquid level, the compensation flow rate is negative.

[0093] It should be understood that the specific value of Ki depends on whether the actual liquid level of the deaerator can reach the required range of the target liquid level. The actual liquid level is controlled within [target liquid level - L2, target liquid level + L2]. L2 is determined by process requirements. In this embodiment, L2 = 10 mm.

[0094] Secondly, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0095] A control device 10 for a deaerator in a heating furnace, see [link / reference] Figure 2 As shown, it includes:

[0096] The actual liquid level detection unit 11 is used to obtain the actual liquid level inside the deaerator;

[0097] The water supply regulating valve opening determination unit 12 is used to determine the opening of the water supply regulating valve in the deaerator as either the first mode or the second mode based on the actual deviation between the actual liquid level in the deaerator and the target liquid level.

[0098] The water supply regulating valve opening control unit 13 is used to control the opening of the water supply regulating valve in the deaerator so that the actual liquid level in the deaerator is consistent with the preset target liquid level of the deaerator.

[0099] The beneficial effects produced by the device provided in this embodiment are the same as those produced by the first aspect embodiment.

[0100] Thirdly, based on the same inventive concept, this application provides the following technical solution through an embodiment:

[0101] A control electronic device for a deaerator in a heating furnace, see [link / reference]. Figure 3 As shown, it includes:

[0102] One or more processors 22 and one or more memories 24, one or more memories 23 storing at least one piece of program code, the at least one piece of program code being loaded and executed by one or more processors to implement the method of any of the above embodiments.

[0103] The bus architecture (represented by bus 20) is described in [reference needed]. Figure 3 As shown, bus 20 may include any number of interconnected buses and bridges, linking various circuits including one or more processors 22 represented by processor 22 and memory represented by memory 24. Bus 20 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 25 provides an interface between bus 20 and receiver 21 and transmitter 23. Receiver 21 and transmitter 23 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 22 is responsible for managing bus 20 and general processing, while memory 24 may be used to store data used by processor 22 during operation.

[0104] The electronic device provided in this embodiment produces the same beneficial effects as the first aspect embodiment.

[0105] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0107] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0108] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0109] The above are merely embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection claimed in the claims.

Claims

1. A control method for a deaerator in a heating furnace, characterized in that, include: The actual liquid level of the deaerator and the preset target liquid level of the deaerator are obtained, and the absolute value of the difference between the preset target liquid level of the deaerator and the actual liquid level of the deaerator is taken as the actual deviation value. If the actual deviation value is greater than the preset deviation value, the opening degree of the deaerator's water supply regulating valve is controlled according to the first control mode. If the actual deviation value is less than or equal to the preset deviation value, the opening degree of the deaerator's water supply regulating valve is controlled according to the second control mode. The step of controlling the opening of the deaerator's water supply regulating valve according to the first control mode includes: using the target liquid level of the deaerator as a set value, controlling the opening of the deaerator's water supply regulating valve so that the actual liquid level of the deaerator reaches the preset target liquid level of the deaerator. The control of the opening of the deaerator's water supply regulating valve according to the second control mode includes: obtaining the water flow rate at the deaerator's outlet; dividing the actual deviation value into multiple intervals and setting a corresponding compensation flow rate for each interval; and using the sum of the water flow rate at the deaerator's outlet and the compensation flow rate as the water supply flow rate at the deaerator's water supply end, so that the actual liquid level of the deaerator reaches the preset target liquid level of the deaerator.

2. The control method according to claim 1, characterized in that, The control method further includes: Obtain the actual makeup water flow rate and actual pressure of the deaerator, as well as the preset target pressure; Based on the actual water supply flow rate of the deaerator, the adjustment parameters of the deaerator's pressure controller are determined so that the actual pressure of the deaerator is consistent with the preset target pressure.

3. The control method according to claim 2, characterized in that, The step of determining the adjustment parameters of the deaerator's pressure controller based on the actual makeup water flow rate of the deaerator, so as to make the actual pressure of the deaerator consistent with the preset target pressure, includes: Based on the actual water supply flow rate of the deaerator, determine whether the actual water supply flow rate is greater than the preset water supply flow rate threshold. If the actual water supply flow rate is greater than the preset water supply flow rate threshold, the adjustment parameter of the pressure controller of the deaerator is the first adjustment parameter; If the actual water supply flow rate is less than the preset water supply flow rate threshold, the pressure controller of the deaerator will be adjusted by a second adjustment parameter, which is less than the first adjustment parameter.

4. The control method according to claim 1, characterized in that, The control method includes: Throughout the entire deaerator pressure control process, the deaerator pressure regulating valve simultaneously controls the deaerator pressure and deaerator temperature.

5. The control method according to claim 2, characterized in that, The control method further includes: Throughout the pressure control process of the deaerator, the preset target pressure is 0.02 MPa and the deaerator temperature is 104 °C.

6. The control method according to claim 1, characterized in that, Setting a corresponding compensation flow for each of the intervals includes: When the target liquid level is greater than the actual liquid level, the compensation flow rate is positive; When the target liquid level is lower than the actual liquid level, the compensation flow rate is negative.

7. A control device for a deaerator in a heating furnace, characterized in that, The apparatus, used in the method according to any one of claims 1 to 6, comprises: The actual liquid level detection unit is used to obtain the actual liquid level inside the deaerator; The water supply regulating valve opening determination unit is used to determine the first control mode or the second control mode based on the actual deviation between the actual liquid level in the deaerator and the target liquid level. The water supply regulating valve opening control unit is used to control the opening of the water supply regulating valve in the deaerator according to the determined first control mode or the second control mode, so that the actual liquid level in the deaerator is consistent with the preset target liquid level of the deaerator.

8. A control electronic device for a deaerator in a heating furnace, characterized in that, The electronic device, applicable to the method of any one of claims 1 to 6, comprises: One or more processors and one or more memories, wherein at least one piece of program code is stored in the one or more memories, the at least one piece of program code being loaded and executed by the one or more processors to implement the method as described in any one of claims 1-6.

Images