Device and method for balancing temperatures of inner wall and outer wall of power station boiler diarrhea tube inlet header

Abstract

The invention discloses a device and method for balancing inner and outer wall temperatures of a power station boiler diarrhea tube inlet header, and belongs to the technical field of power station boiler safety. The device comprises a diarrhea pipe inlet header, a heat preservation header, an adjusting pipeline and a temperature monitoring unit, wherein the heat preservation header is sleeved outside the diarrhea pipe inlet header and forms a closed cavity; the core of the method is that the temperature difference between the inner wall and the outer wall of the header is monitored in real time, when the temperature difference exceeds the limit, an adjusting pipeline is opened, a small amount of working medium in the header is controllably introduced into a heat preservation header cavity, the outer wall temperature of the header is actively adjusted through heat exchange, inner wall changes are dynamically tracked, and therefore the temperature difference is restrained within a safe range. Through closed-loop active control of taking the inner working medium and adjusting the outer wall temperature, the thick-wall thermal inertia is directly resisted, and the technical problems that the temperature difference between the inner wall and the outer wall of the header is large due to rapid load change, and transverse cracks are generated due to thermal stress concentration of a pipe connecting seat are solved.

Description

Technical Field

[0001] This invention relates to the interdisciplinary field of thermal power generation technology and boiler equipment safety engineering, specifically to a device and method for balancing the inner and outer wall temperatures of the inlet header of a power plant boiler. Background Technology

[0002] With the accelerated development of new energy sources such as wind power and photovoltaics, thermal power units are transitioning from base load power sources operating under stable loads to power sources that prioritize both basic security and system regulation while maintaining flexible operation. This places higher demands on the flexibility of generator unit operation. "Low load, deep peak shaving" has become the norm for thermal power units. One important factor affecting deep peak shaving on the boiler side is the reliability of large, thick-walled components. Transverse cracks are prone to occur at the connection points between large, thick-walled headers and pipe banks. These transverse cracks are mainly related to the mechanical and thermal stresses acting on the header connection points. Mechanical stress is related to the pressure borne by the header; the greater the pressure, the greater the mechanical stress, and vice versa. This is an inherent property of the header bearing the working fluid pressure during unit operation. Thermal stress is mainly caused by the temperature difference between the inner and outer walls. Water-cooled wall tubes are composed of thin, fine pipes, resulting in high heat transfer efficiency and a rapid temperature rise rate. In contrast, the header is generally made of large-diameter, thick-walled stainless steel tubing, exhibiting greater thermal inertia. The temperature change of the outer wall lags behind the temperature changes of the water-cooled wall and the inner wall. When the water-cooled wall temperature rises, the temperature of the working fluid flowing through the water-cooled wall tubes quickly matches the temperature of the inner wall of the header. However, as a thick-walled pressure vessel, heat transfer from the inside to the outside of the header takes time. Therefore, during the heating process, the inner wall temperature of the cylinder is always higher than the outer wall temperature. When the water-cooled wall temperature decreases, the inner wall temperature of the header and the water-cooled wall temperature drop rapidly, while the outer wall temperature cannot drop quickly due to the thickness of the header wall. Therefore, during the cooling process, the inner wall temperature of the cylinder is always lower than the outer wall temperature.

[0003] The temperature difference between the inner and outer walls causes inconsistent expansion between the water-cooled wall tubes and the header during rapid load changes, deep peak shaving, or boiler start-up and shutdown, resulting in transverse cracks in the header pipe seat area. To solve this problem, existing methods include segmented header layout, fin trimming, boiler expansion troubleshooting and treatment, increasing wall temperature measuring points, optimizing the boiler steam temperature rise and fall rate during start-up and shutdown, modifying the boiler cooling method, and changing the load rise and fall rate. However, none of these methods can fundamentally solve this problem. Summary of the Invention

[0004] To address the problem in existing technologies where rapid changes in water-cooled wall temperature cause temperature differences between the inner and outer walls of the header, leading to transverse cracks in the header connection seat, this invention provides a device and method for balancing the inner and outer wall temperatures of the header at the inlet of the dilution pipe in a power plant boiler. This method maintains the temperature difference between the inner and outer walls of the header at the inlet of the dilution pipe within the critical temperature range, avoiding the problems of large temperature differences between the inner and outer walls and thermal stress concentration at the header connection seat caused by rapid load increases and decreases, frequent start-ups and shutdowns, and deep peak shaving of the unit. This solves the problem of large-area transverse cracks in the header during unit operation.

[0005] This invention is achieved through the following technical solution: A device and method for balancing the inner and outer wall temperatures of the inlet header of a power plant boiler dilution tube, comprising: The inlet header of the diastolic tube is connected to the vertical water-cooled wall tube bank on the rear wall at its inlet and to the diastolic tube bank at its outlet. The heat-insulating manifold is fitted outside the inlet manifold of the dialysis pipe and forms a sealed cavity between it and the outer wall of the manifold. The regulating pipeline has its inlet end connected to the interior of the inlet header of the diaphoretic pipe, and its outlet end connected to the cavity of the insulated header. A temperature monitoring unit is used to acquire the inner and outer wall temperatures of the inlet header of the dilution pipe in real time. The regulating pipeline is used to controllably introduce the working fluid in the inlet header of the dilution pipe into the cavity of the insulated header based on the temperature difference signal obtained by the temperature monitoring unit, so as to regulate the temperature of the outer wall of the inlet header of the dilution pipe through heat exchange.

[0006] Preferably, the regulating pipeline includes a steam inlet pipeline and a pressure reducing valve, a check valve, and a flow regulating valve arranged sequentially along the working fluid flow direction.

[0007] Preferably, the regulating pipeline includes a main pipeline and at least one branch pipeline. The inlet of the main pipeline is connected to the inlet header of the dilution pipe, and the outlet is connected to the insulation header through the branch pipeline. The pressure reducing valve, check valve, and flow regulating valve are installed on the main pipeline.

[0008] Preferably, the opening degree of the flow regulating valve is configured to be adjusted according to the real-time temperature difference between the inner wall and the outer wall: the opening degree is increased when the temperature difference is greater than a set threshold, and the opening degree is decreased when the temperature difference is reduced.

[0009] Preferably, the temperature monitoring unit includes a first temperature measuring point disposed on the inner wall of the inlet header of the diarrhea tube and a second temperature measuring point disposed on the outer wall.

[0010] Preferably, it further includes a recycling unit, the recycling unit comprising: A drain valve and / or a vent valve connected to the cavity of the insulated manifold; A water storage tank connected to the drain valve and / or vent valve.

[0011] Preferably, the insulated manifold is equipped with pressure measuring points for monitoring its internal pressure.

[0012] Preferably, a set of regulating pipes is provided at each end of the inlet header of the diarrhea pipe.

[0013] Preferably, it also includes a control unit, which is signal-connected to the temperature monitoring unit and the pressure reducing valve and flow regulating valve in the regulating pipeline, and is used to automatically control the opening and closing and the degree of opening of the pressure reducing valve and flow regulating valve according to the temperature difference signal.

[0014] A method for balancing the inner and outer wall temperatures of the inlet header of a power plant boiler dilution tube includes the following steps: Monitor the inner and outer wall temperatures of the inlet header of the diarrhea tube; When the temperature difference between the inner wall and the outer wall exceeds a preset threshold, the regulating pipeline is opened; The working fluid in the inlet header of the diarrhea tube is introduced into the cavity of the heat-insulating header through the regulating pipeline, so that the working fluid exchanges heat with the outer wall of the inlet header of the diarrhea tube to reduce the temperature difference between the inner and outer walls. When the temperature difference decreases to within the preset threshold, the regulating pipeline is turned off or closed.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: This application provides a device for balancing the inner and outer wall temperatures of the inlet header of a power plant boiler's cooling pipe. An insulated header is added outside the cooling pipe inlet header, and a small amount of high- or low-temperature working fluid is introduced into it as a heat transfer medium through a controlled regulating pipeline to directly heat or cool the outer wall. Simultaneously, the real-time monitoring of the temperature difference between the inner and outer walls forms a dynamic adjustment mechanism; the greater the temperature difference, the larger the opening of the regulating valve, the more working fluid is introduced, and the stronger the thermal intervention on the outer wall. This device regulates the natural heat conduction between the inner and outer walls of the header by diverting the working fluid, forcibly shortening the time required for the inner and outer wall temperatures to converge through external heat exchange. This suppresses the peak transient thermal stress generated during operation below the material safety threshold, actively offsetting the temperature difference at its source. Furthermore, this device utilizes the boiler's own working fluid and standard pipeline valves, resulting in low modification risk and easy engineering implementation, providing a direct and effective solution for existing units to cope with the challenges of deep peak shaving. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the device for balancing the inner and outer wall temperatures of the inlet header of the cooling tube in a power plant boiler according to the present invention.

[0018] In the diagram: 1. Vertical water-cooled wall pipe array on the rear wall; 2. Inlet header of the drain pipe; 3. Inner wall of the header; 4. Outer wall of the header; 5. Insulated header; 6. Pressure reducing valve; 7. Check valve; 8. Flow regulating valve; 9. Steam inlet pipe; 10. Drain pipe array; 11. Inner wall temperature measuring point; 12. Pressure measuring point; 13. Outer wall temperature measuring point; 14. Vent valve; 15. Pipeline; 16. Drain valve; 17. Pipeline; 18. Water storage tank. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] See Figure 1 A device for balancing the inner and outer wall temperatures of the inlet header of a power plant boiler with a dialysis pipe, comprising a dialysis pipe inlet header 2, an insulated header 5, and a regulating pipeline; The insulated header 5 is installed outside the dilute pipe inlet header 2. The inlet and outlet of the dilute pipe inlet header 2 are respectively equipped with water-cooled wall pipe row 1 and dilute pipe row 10. One end of the regulating pipeline is connected to the inlet header 2 of the diarrhea pipe, and the other end is connected to the insulation header 5. The working fluid in the inlet header 2 of the diarrhea pipe is introduced into the insulation header through the regulating pipeline to regulate the temperature of the outer wall of the inlet header 2 of the diarrhea pipe.

[0026] This device is based on a dynamic thermal balance mechanism with temperature difference feedback. When the temperature of the water-cooled wall tube bank changes rapidly, the temperature of the inner wall of the inlet header of the thinning tube changes abruptly, while the outer wall of the thick wall generates a significant temperature difference due to thermal inertia. The regulating pipeline is opened to introduce the working fluid inside the inlet header of the thinning tube into the insulated header cavity fitted on the outer wall. The temperature of the outer wall of the inlet header of the thinning tube is regulated through heat exchange, so that the outer wall temperature actively tracks the temperature change of the inner wall. This keeps the temperature difference between the inner and outer walls within the allowable thermal stress range of the material, fundamentally eliminating transverse cracks in the pipe seat caused by alternating thermal stress.

[0027] In some embodiments, the regulating pipeline includes a pipeline and a pressure reducing valve 6, a check valve 7, and a flow regulating valve 8 disposed thereon. One end of the pipeline is connected to the inlet header 2 of the dilution pipe, and the other end is connected to the insulation header 5. When a temperature difference is generated between the inner and outer walls of the dilution pipe inlet header, the working fluid is introduced into the insulation header 5 through the pipeline. The temperature of the outer wall of the dilution pipe inlet header is regulated by heat exchange so that the temperature difference between the inner and outer walls is less than a certain critical temperature. At this critical temperature, the generated thermal stress is less than the allowable stress of the material of the dilution pipe inlet header.

[0028] The pressure reducing valve is used to establish a safe pressure gradient, reducing the pressure of the working fluid extracted from the high-pressure header to a low pressure level that the external insulation header can withstand. The check valve is used to force the flow direction to be singular, preventing backflow of the working fluid or condensate due to pressure difference fluctuations, ensuring the directional certainty of the regulation action and absolute isolation protection for the main system. The flow regulating valve controls the flow rate of the working fluid introduced into the insulation header by precisely adjusting the opening degree based on the real-time monitored temperature difference signal between the inner and outer walls, thereby directly regulating the heat exchange power applied to the outer wall of the header.

[0029] The working medium in the inlet header 2 of the dilution pipe is a high-pressure working medium. It first passes through the pressure reducing valve 6 to reduce the medium pressure. The check valve 7 ensures that the medium in the inlet header of the dilution pipe flows into the insulation header 5 without backflow. The regulating valve 8 adjusts the flow rate into the insulation header. Its opening depends on the difference between the value of the inner wall temperature measuring point 11 and the value of the outer wall temperature measuring point 13. The inner wall temperature measuring point 11 and the outer wall temperature measuring point 13 can reflect the true values ​​of the inner and outer walls of the header. If the difference is large, the opening of the regulating valve 8 is increased; if the difference is small, the opening of the regulating valve 8 is decreased.

[0030] For example, when the water-cooled wall temperature rises, the working fluid flowing into the insulation header 5 from the inlet header 2 of the dilution tube heats the outer wall of the inlet header of the dilution tube; when the water-cooled wall temperature decreases, the working fluid flowing into the insulation header 5 from the inlet header 2 of the dilution tube cools the outer wall of the inlet header of the dilution tube.

[0031] It should be noted that the medium used to reduce the temperature difference between the inner and outer walls of the header is taken from inside the header, and the working fluid temperature is the same as the inner wall temperature of the dilution pipe inlet header. The flow rate of the working fluid taken accounts for a very small proportion of the total working fluid in the dilution pipe inlet header 2, and does not affect the distribution of the entire dilution pipe inlet header 2 to the flow of the entire dilution pipe drain 10.

[0032] Furthermore, the pipeline includes a main pipeline and branch pipelines. The inlet of the main pipeline is connected to the inlet header 2 of the branch pipeline. One end of the branch pipeline is connected to the outlet of the main pipeline, and the other end of the branch pipelines is evenly distributed on the insulated header 5.

[0033] In some embodiments, a set of regulating pipes is provided at both ends of the inlet header 2 of the dilution pipe, and the working fluid is simultaneously input into the heat-insulating header 5 through the two sets of regulating pipes to improve the temperature regulation rate of the inner and outer walls of the inlet header of the dilution pipe.

[0034] By establishing parallel redundant working fluid delivery channels, the working fluid flow supply capacity for heat exchange and the uniformity of heating / cooling coverage on the outer wall are nearly doubled compared to a single-pipe system, thus significantly accelerating the rate and power of dynamic response to the temperature difference between the inner and outer walls. This design not only suppresses temperature peaks more rapidly under drastic operating conditions, effectively meeting more stringent peak-shaving rate requirements, but also reduces the risk of single-point failures due to the dual-path parallel operation, improving the overall operational reliability of the unit. Simultaneously, the dual-path flow can be adjusted collaboratively or independently, achieving more precise temperature field equalization control along the header axis.

[0035] In some embodiments, multiple inner wall temperature measuring points 11 and outer wall temperature measuring points 13 are provided on the inner and outer walls of the diarrhea pipe inlet header 2. A temperature sensor is provided at each measuring point to monitor the inner and outer temperatures of the diarrhea pipe inlet header in real time. The temperature sensor, pressure reducing valve 6, flow regulating valve 8 and control unit are connected. The control unit automatically controls the working state of pressure reducing valve 6 and flow regulating valve 8 according to the temperature signal.

[0036] When the temperature difference between the inner wall temperature measuring point 11 and the outer wall temperature measuring point 13 is greater than a certain critical temperature, the thermal stress generated by this critical temperature difference exceeds the allowable stress of the material of the inlet header 2 of the diaphragm pipe, and the pressure reducing valve 6, the check valve 7, and the regulating valve 8 start to operate.

[0037] When the temperature difference between the inner wall temperature measuring point 11 and the outer wall temperature measuring point 13 is less than a certain critical temperature, the thermal stress generated by this critical temperature difference does not exceed the allowable stress of the material of the inlet header 2 of the diaphragm pipe, and the pressure reducing valve 6, check valve 7, and regulating valve 8 do not operate.

[0038] In some embodiments, the insulated manifold 5 is provided with a pressure measuring point 12, and the pressure measuring point 12 is provided with a pressure gauge to detect the internal pressure of the insulated manifold 5.

[0039] Multiple pressure gauges are installed at different locations in the insulated header to detect its internal pressure. The pressure signal can serve as auxiliary feedback for the temperature regulation process. For example, an abnormal increase in pressure may indicate poor flow or valve failure, thereby improving the automation level and operational reliability of the entire system.

[0040] In some embodiments, the insulated manifold 5 is provided with a vent valve 14 and a drain valve 16. The vent valve 14 is connected to the water storage tank through a pipeline 15, and the drain valve 16 is connected to the water storage tank through a pipeline 17. In order to reduce the loss of working fluid, the working fluid on the outer wall of the heating or cooling manifold is recovered to the water storage tank through the vent valve 14 and the drain valve 16.

[0041] The vent valve is responsible for discharging non-condensable gases, ensuring pressure safety and heat exchange efficiency within the chamber; the drain valve is specifically designed to discharge condensate, preventing liquid accumulation from affecting heat exchange uniformity and avoiding the risk of water hammer. The vent valve 14 and drain valve 16 work together to maintain a stable vapor-liquid balance and pressure environment inside the insulated header, ensuring continuous and efficient temperature regulation. Furthermore, by recovering all discharged working fluid into the water storage tank, they form a closed-loop system with zero working fluid waste. This significantly improves the reliability and automation of the unit's operation while also enhancing the economic efficiency of the power plant.

[0042] The insulation header is made of the same material as the inlet header of the dilution pipe, namely 15CrMoG or 12Cr1MoVG. This allows the insulation header shell to withstand the working fluid pressure required to match the inner and outer wall temperatures of the dilution pipe header. When the pressure in the insulation header reaches a certain level, the drain valve or vent valve will automatically open.

[0043] The following describes the temperature control method of the device for balancing the inner and outer wall temperatures of the inlet header of the power plant boiler, which is provided in this application. The temperature change of the steam temperature of the vertical water-cooled wall 1 of the rear wall is described separately. 1. Steam temperature rise in the vertical water-cooled wall at the rear. When the unit is running, when the steam temperature of the vertical water-cooled wall 1 of the rear wall rises, it enters the inlet header 2 of the dialysis pipe. The temperature of the inner wall 3 of the header rises rapidly. Since the inlet header 2 of the dialysis pipe is a thick-walled structure, the temperature of the outer wall 4 of the header is low, and there is a temperature difference between the inner and outer walls of the header. At this time, the pressure reducing valve 6 and the check valve 7 are opened, and the opening of the regulating valve 8 is adjusted. Steam flows out from the inlet header 2 of the dialysis pipe and flows into the insulation header 5 through the steam inlet pipeline 9, which makes the temperature of the outer wall 4 of the entire dialysis pipe inlet header rise. When the temperature difference is detected by the inner wall temperature measuring point 11 and the outer wall temperature measuring point 13, the regulating valve 8 is gradually closed to keep the temperature difference between the inner and outer walls of the header within a small range. At the same time, the pressure of the insulation header is monitored by the pressure measuring point 12. After the steam is cooled by the outer wall 4 of the header, it condenses into water. The drain valve 16 is opened, and the steam flows into the water storage tank 18 through the drain valve to the water storage tank pipeline 17.

[0044] II. Temperature rise of the vertical water-cooled wall 1 at the rear wall When the unit is running, when the steam temperature of the vertical water-cooled wall 1 of the rear wall decreases, it enters the inlet header 2 of the dilution tube. The temperature of the inner wall 3 of the header decreases rapidly. Since the inlet header 2 of the dilution tube is a thick-walled structure, the temperature conduction is delayed. At this time, the temperature of the outer wall 4 of the header is higher than that of the inner wall, and there is a temperature difference between the inner and outer walls of the header. Based on the temperature difference between the inner wall temperature measuring point 11 and the outer wall temperature measuring point 13, when the difference exceeds the set value, the pressure reducing valve 6 and the check valve 7 are opened, and the opening of the regulating valve 8 is adjusted. Steam flows out from the inlet header 2 of the dilution pipe and into the insulation header 5 via the steam inlet pipe 9, causing the temperature of the outer wall 4 of the entire dilution pipe inlet header to decrease. When the temperature difference between the inner wall temperature measuring point 11 and the outer wall temperature measuring point 13 of the dilution pipe inlet header is detected to decrease, the regulating valve 8 is gradually closed to always keep the temperature difference between the inner and outer walls of the header within a small range. At the same time, after the pressure measuring point 12 of the insulation header reaches a certain value, the vent valve 14 is opened, and the steam flows into the water storage tank 18 via the vent valve and the water storage tank pipeline 15. By adjusting the flow rate into the insulation header, the temperature difference between the inner and outer walls of the dilution pipe is reduced, the thermal stress caused by temperature rise changes is reduced, and the generation of transverse cracks at the header pipe joint is eliminated.

[0045] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A device and method for balancing the inner and outer wall temperatures in the inlet header of a power plant boiler steam drum characterized by, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

2. The device and method for balancing the inner and outer wall temperature of the inlet header of the stretched tube of the boiler of the power plant according to claim 1, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

3. The device and method for balancing the inner and outer wall temperature of the inlet header of the stretched tube of the boiler of the power plant according to claim 2, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

4. The device and method for balancing the inner and outer wall temperature of the inlet header of the stretched tube of the boiler of the power plant according to claim 2, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

5. The device and method for balancing the inner and outer wall temperature of the inlet header of the stretched tube of the boiler of the power plant according to claim 1, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

6. A device and method for balancing the inner and outer wall temperatures in the inlet header of a boiler pass tube of a power plant according to claim 1, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

7. A device and method for balancing the inner and outer wall temperatures in the inlet header of a boiler pass tube of a power plant according to claim 1, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

8. A device and method for balancing the inner and outer wall temperatures in the inlet header of a stretched tube of a utility boiler according to any one of claims 1 to 7, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

9. A device for balancing the inner and outer wall temperatures in the inlet header of a boiler pass of a power plant according to claim 1, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube.

10. A method for balancing the inner and outer wall temperatures in the inlet header of a drum of a power plant boiler using the device according to any one of claims 1 to 9, characterized in that, The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. 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The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a platen tube inlet header of a platen tube. The application relates to a temperature regulating system for a pl

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