Accurate temperature reduction control device and control method

Abstract

The invention provides a precise temperature reduction control device and method, and the device comprises a steam inlet module which is used for introducing high-temperature and high-pressure steam, and carrying out the pressure reduction of the steam; the mixing module is used for mixing the steam subjected to pressure reduction and atomized water and scattering fog drops to obtain steam subjected to temperature reduction; the control module is used for collecting the real-time steam temperature and pressure of the steam inlet module and the temperature before atomized water injection in real time, obtaining the enthalpy value of current superheated steam, the enthalpy value of target saturated steam and the enthalpy value before atomized water injection through table look-up by combining the real-time steam temperature and pressure of the steam inlet module and the temperature before atomized water injection, and calculating the target water injection amount. A corresponding water spraying amount control instruction is generated; the atomized water supply module is used for spraying atomized water to the mixing module based on the water spraying amount control instruction; and the steam outlet module is used for outputting the steam after temperature reduction. The steam and atomized water can be fully mixed, the water spraying amount is accurately controlled, and the dryness of the steam after temperature reduction is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of temperature control technology, and in particular to a precise temperature reduction control device and control method. Background Technology

[0002] In industries such as power, chemical, and metallurgy, steam serves as a crucial energy carrier, and its temperature parameters directly impact the stability of production processes and the safety of equipment operation. During steam transportation and utilization, high-temperature steam often requires cooling to ensure its temperature meets the requirements of subsequent equipment or processes. Existing steam desuperheating technologies mostly employ direct mixing of steam and cooling water. However, this approach has several drawbacks: First, the design of the mixing structure between the depressurized steam and atomized water is often flawed. Simple spray mixing can easily lead to uneven mixing, resulting in localized excessively high or low steam temperatures. Second, the large droplet size during mixing makes it difficult for the droplets to fully contact the steam, further reducing the mixing effect. Third, water spray volume control is often based on open-loop or simple closed-loop control, without incorporating real-time steam enthalpy for feedforward calculations. This makes it impossible to dynamically adjust the water spray volume according to the steam state, resulting in low desuperheating accuracy and difficulty in ensuring the dryness of the desuperheated steam. Excessive moisture can easily corrode downstream equipment or affect process quality. Summary of the Invention

[0003] This invention provides a precise cooling control device and method to solve the above problems, enabling full mixing of steam and atomized water, precise control of water spray volume, and ensuring the dryness of steam after cooling.

[0004] This invention provides a precise cooling control device, comprising: Steam inlet module, mixing module, control module, atomized water supply module, and steam outlet module; The steam inlet module is used to connect high-temperature and high-pressure steam and to reduce the pressure of the steam. The mixing module is used to mix the depressurized steam with atomized water and to disperse the droplets to obtain de-cooled steam. The control module is used to collect the real-time steam temperature and pressure of the steam inlet module and simultaneously collect the temperature before the atomized water is injected. Combined with the target saturated steam temperature under the current operating conditions, the enthalpy value of the current superheated steam, the enthalpy value of the target saturated steam, and the enthalpy value before the atomized water is injected are obtained by looking up a table. The target water injection volume is calculated, and the corresponding water injection volume control command is generated and sent to the atomized water supply module. The atomized water supply module is used to spray atomized water into the mixing module based on the water spray volume control command; The steam outlet module is used to output de-cooled steam.

[0005] Preferably, in a precise cooling control device, the mixing module includes: a mixing chamber; The mixing chamber is used to guide the mixture of atomized water and steam to form a swirling flow, which is then dispersed by the droplet dispersing structure.

[0006] Preferably, in a precise cooling control device, the control module includes: The data acquisition unit is used to collect the real-time steam temperature and pressure of the steam inlet module and the steam outlet module, and simultaneously collect the temperature before atomized water injection and the mass flow rate of steam after pressure reduction. Based on the target saturated steam temperature under the pressure of the steam inlet module, the real-time steam temperature of the steam inlet module, and the temperature before atomized water injection, the enthalpy of the current superheated steam and the enthalpy of the target saturated steam are obtained by looking up the table. The feedforward calculation unit is used to calculate the target spray volume of the atomized water supply module based on the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection, combined with the mass flow rate of the steam after pressure reduction at the steam inlet module. The closed-loop feedback unit is used to compare the real-time steam temperature of the steam outlet module with the target saturated steam temperature to obtain the feedback outlet temperature error, and to correct the target water spray volume based on the feedback outlet temperature error to obtain the final target water spray volume. The instruction generation unit is used to generate corresponding water spray volume control instructions based on the target water spray volume or the final target water spray volume, and send them to the instruction execution unit. Among them, the final target water spray volume has a higher priority than the target water spray volume; The instruction execution unit is connected to the atomizing water flow regulating valve to receive water spray volume control instructions and adjust the opening degree of the control flow regulating valve according to the water spray volume control instructions.

[0007] Preferably, in a precise cooling control device, the closed-loop feedback unit includes: The water spray volume correction subunit is used to obtain the temperature change trend characteristics of the most similar steam based on the deviation direction corresponding to the current temperature deviation critical point of the steam outlet module and the mass flow rate of the steam after pressure reduction, and by referring to the feedback response trend reference table. Based on the steam temperature change trend characteristics of the maximum similarity, combined with the actual steam temperature corresponding to the temperature deviation connection point, the steam temperature change of the steam outlet module within the feedback response interval is predicted, and the feedback response temperature difference is obtained. Based on the feedback response temperature difference, the feedback outlet temperature error is corrected to obtain the final feedback temperature difference; Based on the final feedback temperature difference and the target saturated steam temperature, the final feedback steam temperature of the steam outlet module is obtained. Combined with the pressure of the steam outlet module, the actual outlet steam enthalpy value is obtained by looking up a table. The compensated enthalpy is obtained based on the actual outlet steam enthalpy and the target saturated steam enthalpy. The real-time steam enthalpy of the steam outlet module is corrected based on the compensation enthalpy value to obtain the required steam enthalpy value. The required steam enthalpy value is then sent to the feedforward calculation unit for calculation to obtain the final target water spray volume.

[0008] Preferably, in a precise cooling control device, the closed-loop feedback unit further includes: The compensation reference automatic update subunit is used to obtain multiple historical feedback control data of the steam outlet module within a preset time. Based on the historical feedback control data, corresponding control temperature curves are generated respectively, and the temperature deviation critical point and the atomized water correction spray volume injection node are determined on each control temperature curve respectively. Based on the temperature deviation critical point and the atomized water correction spray volume injection node, each control temperature curve is truncated to obtain multiple feedback response interval temperature change sub-curves. Based on the mass flow rate of steam after pressure reduction, multiple feedback response interval temperature change sub-curves are grouped to obtain multiple feedback curve groups. Then, according to the deviation direction of the temperature deviation critical point corresponding to each feedback response interval temperature change sub-curve, the deviation type within the feedback curve group is classified to obtain incremental feedback curve sub-data groups and decremental feedback curve sub-data groups. The data within the incremental feedback curve sub-data group and the decremental feedback curve sub-data group were compared and aligned within the group. Based on the comparison results, the steam temperature change trend characteristics of the steam outlet module within the feedback response interval were obtained. Based on the results of the two groupings and the characteristics of the steam temperature change trend, a feedback response trend reference table is generated and stored. Based on a preset update cycle, the latest historical feedback control data is obtained to automatically update the feedback response trend reference table.

[0009] Preferably, in a precise cooling control device, the closed-loop feedback unit further includes: The error recording subunit is used to record the time points when the feedback outlet temperature error is not equal to zero, and to generate an error log for storage by combining the corresponding control data. After adjusting the opening of the flow regulating valve based on the final target water spray volume, the steam temperature of the steam outlet module is monitored at high frequency to obtain the steam temperature change within the preset key monitoring period and to determine whether the steam temperature reaches the target saturated steam temperature within the preset key monitoring period. If the target is reached, the steam temperature monitoring frequency of the steam outlet module will return to normal. If the target saturated steam temperature is not reached, based on the steam temperature change, it is determined whether the real-time steam temperature of the steam outlet module is approaching the target saturated steam temperature. If so, it is determined that the feedback response trend reference table is lagging, and an update command is generated and sent to the compensation reference automatic update subunit to immediately update the feedback response trend reference table. If not, and the steam temperature remains constant, then the steam outlet module temperature detection device is determined to be abnormal, and a detection device fault signal is generated and sent to the remote terminal. Otherwise, a fault signal for the cooling equipment is generated and sent to the remote terminal.

[0010] Preferably, in a precise cooling control device, the command execution unit includes: The instruction receiving unit is used to receive and parse the water spray volume control instruction to determine the actual spray volume of atomized water. The control conversion unit is used to compare the actual spray demand of atomized water with the actual spray volume at that time to obtain the spray volume deviation, and combine the mapping relationship between the atomized water flow regulating valve and the spray volume to determine the adjustment amount of the flow regulating valve. An execution unit is used to regulate the opening degree of the control flow regulating valve based on the regulation amount.

[0011] Preferably, in a precise cooling control device, the atomizing water supply module includes: The nozzle angle adaptive control unit is used to sense the rotation direction and rotation angle of the blades in real time based on sensors installed on the blades of the swirling mixing component. By using the design data of the mixing chamber, the initial positional relationship between each atomizing water nozzle and the corresponding swirling mixing component is determined; Based on the initial positional relationship, and combined with the rotation direction and rotation angle of the blades, the following movement parameters of each atomizing water nozzle are determined respectively. Based on the initial positional relationship, the relative distance between each nozzle and the corresponding swirling mixing component is determined, and the nozzle water mist spraying speed is obtained; Based on the water mist spraying speed and relative position distance of the nozzle, the lag time of the air-water mixture contacting the blade is determined; Based on real-time sensing of the blade's rotation direction and angle, the blade angular velocity of the swirling mixing component is calculated. Based on the blade angular velocity and lag time, the leading rotation error is obtained. Combined with the blade's single maximum rotation angle, the non-periodic error of the blade rotation is determined. Based on the preset blade angle-injection triggering relationship and non-periodic error, the injection-rotation non-cooperative error is determined; Based on the non-cooperative error between jetting and rotation, and combined with the blade angular velocity, the optimal initial injection time point for atomized water is determined. Once the swirl mixing component is activated and reaches the optimal initial injection time point, the following movement parameters are sent to the corresponding swirl mixing component of each atomized water nozzle to spray atomized water.

[0012] Preferably, in a precise cooling control device, the device further includes: The remote communication module is used to send the collected data and fault signals to a remote terminal for visual display, and to allow staff to remotely input cooling control parameters through the remote terminal to remotely adjust the parameters of the control device.

[0013] The human-machine interface module is used to query de-temperature control parameters and historical data on a display screen connected to the control device, and to display steam parameters, atomized water injection volume, valve opening degree and fault alarm information in real time.

[0014] This invention provides a precise cooling control method, applied to a precise cooling control device, comprising: S1: High-temperature and high-pressure steam enters through the steam inlet pipe of the steam inlet module, and after being reduced to the preset pressure by the pressure reducing valve, it flows into the mixing module; S2: Real-time acquisition of steam temperature and pressure from the steam inlet module, and simultaneous acquisition of the temperature before atomized water injection. Combined with the target saturated steam temperature under the current operating conditions, the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection are obtained by looking up the table. S3: Obtain the mass flow rate of the steam after depressurization at the steam inlet module. Based on the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection, and combined with the mass flow rate of the steam after depressurization at the steam inlet module, calculate the target spray volume of the atomized water supply module. S4: Controls the atomized water supply module to spray the target amount of atomized water into the mixing module; S5: The depressurized steam and atomized water are mixed and the droplets are dispersed through the mixing module to obtain de-cooled steam; S6: Outputs de-cooled steam through the steam outlet module.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: This invention utilizes a steam inlet module to depressurize high-temperature, high-pressure steam, stabilizing fluctuating steam pressure within a preset range. This prevents imbalances in the steam-water contact ratio within the mixing module caused by sudden pressure changes, providing a stable pressure environment for the uniform mixing of atomized water and steam. This reduces the risk of excessive or insufficient cooling caused by pressure fluctuations. Simultaneously, the mixing module disperses droplets during the mixing process, effectively reducing the atomized water particle size and increasing the contact area between steam and atomized water. This overcomes the shortcomings of traditional mixing structures where large-diameter droplets struggle to fully contact the steam. Furthermore, the dispersed droplets mix more evenly with the steam, effectively eliminating the coexistence of high-temperature steam and subcooled water masses within the mixing chamber. This ensures a consistent steam temperature distribution after depressurization, eliminating the risk of localized temperature deviations. By controlling the real-time steam temperature and pressure of the steam inlet module and simultaneously collecting the temperature before atomized water injection, combined with the target saturated steam temperature under the current operating conditions, and by looking up tables (including the "Steam Enthalpy Table" and the "Water Enthalpy Table"), the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection are obtained. Combined with the mass flow rate of the steam after pressure reduction, the cooling water injection quantity (i.e., the target injection quantity) of the atomized water supply module is calculated. While predicting the theoretical injection quantity in advance based on the real-time energy state of the steam, the injection quantity can also be dynamically corrected by the outlet temperature error. This effectively solves the problems of lag in injection quantity adjustment and inability to match changes in steam state in traditional control methods, ensuring that the injection quantity is always precisely matched with the steam de-cooling demand, and greatly improving the steam de-cooling accuracy. Subsequently, the atomized water supply module sprays atomized water based on the precise instructions of the control module. This avoids the problem of excessive water spraying causing the steam to carry excess moisture or insufficient water spraying causing the cooling to fail to meet the standard. The appropriate amount of atomized water, combined with the thorough mixing design of the mixing module, ensures that the atomized water can completely exchange heat with the steam and vaporize, ensuring that the dryness of the steam after cooling meets the requirements of industrial steam (e.g., ≥97% in the power and chemical industries). This avoids excess moisture causing corrosion and scaling to subsequent steam-using equipment (e.g., steam turbines, heat exchangers), which helps to extend the service life of the equipment.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in this application.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of a precise temperature reduction control device; Figure 2 A schematic diagram of the control module of a precision cooling control device. Figure 3 This is a flowchart of a precise temperature reduction control method. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Example 1: This invention provides a precise cooling control device, such as... Figure 1 As shown, it includes: Steam inlet module, mixing module, control module, atomized water supply module, and steam outlet module; The steam inlet module is used to connect high-temperature and high-pressure steam and to reduce the pressure of the steam. The mixing module is used to mix the depressurized steam with atomized water and to disperse the droplets to obtain de-cooled steam. The control module is used to collect the real-time steam temperature and pressure of the steam inlet module and simultaneously collect the temperature before the atomized water is injected. Combined with the target saturated steam temperature under the current operating conditions, the enthalpy value of the current superheated steam, the enthalpy value of the target saturated steam, and the enthalpy value before the atomized water is injected are obtained by looking up a table. The target water injection volume is calculated, and the corresponding water injection volume control command is generated and sent to the atomized water supply module. The atomized water supply module is used to spray atomized water into the mixing module based on the water spray volume control command; The steam outlet module is used to output de-cooled steam.

[0021] The beneficial effects of the above technical solution are as follows: This invention uses a steam inlet module to depressurize high-temperature and high-pressure steam, stabilizing fluctuating steam pressure within a preset range. This avoids imbalances in the steam-water contact ratio within the mixing module caused by sudden changes in steam pressure, providing a stable pressure environment for the uniform mixing of atomized water and steam. This reduces the problem of excessive or insufficient local cooling caused by pressure fluctuations from the source. During the mixing process of atomized water and steam, the mixing module simultaneously performs droplet dispersion treatment, which can effectively reduce the atomized water particle size and increase the contact area between steam and atomized water. This effectively overcomes the defect in traditional mixing structures where large-diameter droplets cannot fully contact the steam. At the same time, the dispersed droplets can mix more evenly with the steam, effectively eliminating the coexistence of high-temperature steam zones and supercooled water masses in the mixing chamber, ensuring the most consistent steam temperature distribution after cooling, and eliminating the risk of local temperature deviations. The control module utilizes the real-time steam temperature and pressure from the steam inlet module, and simultaneously collects the temperature before atomized water injection. Combined with the target saturated steam temperature under the current operating conditions, the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection are obtained by looking up tables (including the "Steam Enthalpy Table" and the "Water Enthalpy Table"). The cooling water injection volume (i.e., the target injection volume) of the atomized water supply module is calculated in conjunction with the mass flow rate of the depressurized steam. While predicting the theoretical injection volume in advance based on the real-time energy state of the steam, the injection volume can also be dynamically corrected by the outlet temperature error. This effectively solves the problems of lag in injection volume adjustment and inability to match changes in steam state in traditional control methods, ensuring that the injection volume is always precisely matched with the steam de-cooling demand, and greatly improving the steam de-cooling accuracy. Subsequently, the atomized water supply module sprays atomized water based on the precise instructions of the control module. This avoids the problem of excessive water spraying causing the steam to carry excess moisture or insufficient water spraying causing the cooling to fail to meet the standard. The appropriate amount of atomized water, combined with the thorough mixing design of the mixing module, ensures that the atomized water can completely exchange heat with the steam and vaporize, ensuring that the dryness of the steam after cooling meets the requirements of industrial steam (e.g., ≥97% in the power and chemical industries). This avoids excess moisture causing corrosion and scaling to subsequent steam-using equipment (e.g., steam turbines, heat exchangers), which helps to extend the service life of the equipment.

[0022] Example 2: Based on Example 1, the mixing module includes: a mixing cavity; The mixing chamber is used to guide the mixture of atomized water and steam to form a swirling flow, which is then dispersed by the droplet dispersing structure.

[0023] The beneficial effects of the above technical solution are as follows: This invention utilizes the centrifugal force of swirling flow to break up the stratified contact between steam and water, and then disperses the agglomerated large droplets into fine and uniform small droplets (20-50μm) through a droplet-dispersing structure, greatly expanding the contact area between steam and water. Whether it is the heat absorption of low-temperature steam cooling or the vaporization of droplets by steam humidification, it can significantly accelerate the heat and mass transfer efficiency and shorten the functional response time. It fundamentally solves the problem of uneven mixing of atomized water and steam, ensuring that the steam mixture is highly uniform in temperature, humidity, and composition, and effectively preventing local overheating or overhumidification.

[0024] Example 3: Based on Example 2, the control module, such as Figure 2 As shown, it includes: The data acquisition unit is used to collect the real-time steam temperature and pressure of the steam inlet module and the steam outlet module, and simultaneously collect the temperature before atomized water injection and the mass flow rate of steam after pressure reduction. Based on the target saturated steam temperature under the pressure of the steam inlet module, the real-time steam temperature of the steam inlet module, and the temperature before atomized water injection, the enthalpy of the current superheated steam and the enthalpy of the target saturated steam are obtained by looking up the table. The feedforward calculation unit is used to calculate the target spray volume of the atomized water supply module based on the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection, combined with the mass flow rate of the steam after pressure reduction at the steam inlet module. The closed-loop feedback unit is used to compare the real-time steam temperature of the steam outlet module with the target saturated steam temperature to obtain the feedback outlet temperature error, and to correct the target water spray volume based on the feedback outlet temperature error to obtain the final target water spray volume. The instruction generation unit is used to generate corresponding water spray volume control instructions based on the target water spray volume or the final target water spray volume, and send them to the instruction execution unit. Among them, the final target water spray volume has a higher priority than the target water spray volume; The instruction execution unit is connected to the atomizing water flow regulating valve to receive water spray volume control instructions and adjust the opening degree of the control flow regulating valve according to the water spray volume control instructions.

[0025] In this embodiment, based on the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection, combined with the mass flow rate of the steam after pressure reduction at the steam inlet module, the specific calculation formula for the target spray volume of the atomized water supply module is as follows: ; Wherein, CW represents the target water spray volume; HW represents the mass flow rate of steam after pressure reduction at the steam inlet module; h1 represents the enthalpy of the current superheated steam; h2 represents the enthalpy of the target saturated steam; and h3 represents the enthalpy of the atomized water before spraying.

[0026] For example, if the steam temperature at the steam inlet module is 260℃, the target saturated steam temperature is 110℃, the mass flow rate of the steam after pressure reduction at the steam inlet module is 1000 kg / h, the enthalpy of the current superheated steam is 2911.2 KJ / kg, the enthalpy of the target saturated steam is 2690.8 KJ / kg, the temperature before atomized water injection is 20℃, and the enthalpy of the atomized water before injection is 84.476 KJ / kg, then by substituting these values ​​into the above calculation formula, the target water injection rate CW is obtained as 85.56 kg / h.

[0027] The beneficial effects of the above technical solution are as follows: This invention synchronously collects the steam inlet / outlet temperature and pressure, the temperature of the atomized water before injection, and the mass flow rate of the steam after pressure reduction in real time through a data acquisition unit (sampling frequency ≥ 1Hz). Then, based on the target saturated steam temperature under the pressure of the steam inlet module, the real-time steam temperature of the steam inlet module, and the temperature before injection of the atomized water, the enthalpy value of the current superheated steam and the enthalpy value of the target saturated steam are obtained by looking up a table, realizing a comprehensive perception from the steam energy state to the atomized water regulation capability. Through the collaborative design of the feedforward calculation unit and the closed-loop feedback unit, the problem of traditional control modules relying solely on single feedback regulation and struggling to balance response speed and control accuracy is solved. By using the feedforward calculation unit to calculate the target water injection volume in advance based on core parameters such as steam enthalpy and mass flow rate, preliminary adjustments can be made quickly when steam parameters change abruptly (e.g., inlet temperature fluctuation ±10℃), avoiding the lag of pure feedback control; the closed-loop feedback unit performs fine correction based on the outlet temperature error, compensating for any parameter deviations that may exist in the feedforward calculation. By employing a logic design where the final target spray volume has a higher priority than the target spray volume in the instruction generation unit, the problem of chaotic adjustment when parameters conflict during control is resolved. When the closed-loop feedback unit detects that the outlet temperature error is not zero, it can immediately override the target spray volume calculated by the feedforward, and the flow regulating valve can be quickly adjusted through the instruction execution unit. During the temperature stabilization phase (i.e., when the outlet temperature error is zero), more energy-efficient feedforward control takes precedence, effectively improving the device's adaptive adjustment to operating conditions and its efficiency in handling anomalies. Finally, the instruction execution unit regulates the opening of the control flow regulating valve according to the spray volume control instruction, achieving adaptive control of device parameters. This effectively prevents the risk of steam parameter fluctuations, meets the core requirement of precise cooling in industrial scenarios, and provides a path for continuous optimization of cooling parameters.

[0028] Example 4: Based on Example 3, the closed-loop feedback unit includes: The water spray volume correction subunit is used to obtain the temperature change trend characteristics of the most similar steam based on the deviation direction corresponding to the current temperature deviation critical point of the steam outlet module and the mass flow rate of the steam after pressure reduction, and by referring to the feedback response trend reference table. Based on the steam temperature change trend characteristics of the maximum similarity, combined with the actual steam temperature corresponding to the temperature deviation connection point, the steam temperature change of the steam outlet module within the feedback response interval is predicted, and the feedback response temperature difference is obtained. Based on the feedback response temperature difference, the feedback outlet temperature error is corrected to obtain the final feedback temperature difference; Based on the final feedback temperature difference and the target saturated steam temperature, the final feedback steam temperature of the steam outlet module is obtained. Combined with the pressure of the steam outlet module, the actual outlet steam enthalpy value is obtained by looking up a table. The compensated enthalpy is obtained based on the actual outlet steam enthalpy and the target saturated steam enthalpy. The real-time steam enthalpy of the steam outlet module is corrected based on the compensation enthalpy value to obtain the required steam enthalpy value. The required steam enthalpy value is then sent to the feedforward calculation unit for calculation to obtain the final target water spray volume.

[0029] In this embodiment, the deviation direction includes positive deviation (feedback response temperature difference is greater than zero, that is, the real-time steam temperature of the steam outlet module is greater than the target saturated steam temperature) and negative deviation (feedback response temperature difference is less than zero, that is, the real-time steam temperature of the steam outlet module is less than the target saturated steam temperature).

[0030] In this embodiment, the compensated enthalpy value refers to the difference between the actual outlet steam enthalpy value and the target saturated steam enthalpy value.

[0031] The beneficial effects of the above technical solution are as follows: This invention introduces temperature change trend feature comparison through the water spray volume correction subunit, solving the problem that traditional closed-loop control only performs static adjustment based on the current temperature error and cannot cope with the early prediction of system lag. Utilizing the feedback response trend reference table, by accurately matching the temperature change trend feature with the maximum similarity through the deviation direction of the current temperature deviation critical point and the steam mass flow rate, it can predict the steam temperature change within the feedback response interval in advance (e.g., predicting that the temperature will continue to rise by 2℃ within the feedback response interval (e.g., 500ms)). This greatly improves the accuracy of feedback control while effectively avoiding overshoot caused by system lag (e.g., from ±1.5℃ to ±0.5℃). Based on the final feedback temperature difference and the target saturated steam temperature, this invention obtains the final feedback steam temperature of the steam outlet module. Combined with the pressure of the steam outlet module, the actual outlet steam enthalpy value is obtained by looking up a table. The compensation enthalpy value is calculated based on the actual outlet steam enthalpy value and the target saturated steam enthalpy value. When steam parameters deviate due to fluctuations in operating conditions (e.g., a sudden drop in pressure causing abnormal enthalpy), the required steam enthalpy can be corrected by compensating for the enthalpy, thus eliminating the root cause of the error at its energy level. For example, when the specific heat capacity of steam deviates from the standard value by 10% due to pressure changes, the compensating enthalpy can be corrected by 10% simultaneously, ensuring that the feedforward calculation unit obtains an accurate energy reference and significantly improving the accuracy and stability of steam temperature control.

[0032] Example 5: Based on Example 4, the closed-loop feedback unit further includes: The compensation reference automatic update subunit is used to obtain multiple historical feedback control data of the steam outlet module within a preset time. Based on the historical feedback control data, corresponding control temperature curves are generated respectively, and the temperature deviation critical point and the atomized water correction spray volume injection node are determined on each control temperature curve respectively. Based on the temperature deviation critical point and the atomized water correction spray volume injection node, each control temperature curve is truncated to obtain multiple feedback response interval temperature change sub-curves. Based on the mass flow rate of steam after pressure reduction, multiple feedback response interval temperature change sub-curves are grouped to obtain multiple feedback curve groups. Then, according to the deviation direction of the temperature deviation critical point corresponding to each feedback response interval temperature change sub-curve, the deviation type within the feedback curve group is classified to obtain incremental feedback curve sub-data groups and decremental feedback curve sub-data groups. The data within the incremental feedback curve sub-data group and the decremental feedback curve sub-data group were compared and aligned within the group. Based on the comparison results, the steam temperature change trend characteristics of the steam outlet module within the feedback response interval were obtained. Based on the results of the two groupings and the characteristics of the steam temperature change trend, a feedback response trend reference table is generated and stored. Based on a preset update cycle, the latest historical feedback control data is obtained to automatically update the feedback response trend reference table.

[0033] The beneficial effects of the above technical solution are as follows: This invention acquires multiple historical feedback control data of the steam outlet module within a preset time period. Based on the historical feedback control data, corresponding control temperature curves are generated. On each control temperature curve, the temperature deviation critical point and the atomized water correction injection node are determined, enabling precise positioning of key intervention points during the control process. Then, based on the temperature deviation critical point and the atomized water correction injection node, each control temperature curve is segmented to obtain multiple feedback response interval temperature change sub-curves. Through analysis of these feedback response interval temperature change sub-curves, a control reference basis highly matched with the actual operating state is established, providing a foundation for rapid response of feedback control and making compensation adjustment more targeted. Furthermore, based on a preset update cycle, the latest historical feedback control data is automatically updated to the feedback response trend reference table, ensuring timely inclusion of the latest operating data. This keeps the feedback response trend reference table synchronized with the current system state, effectively addressing system characteristic drift caused by factors such as equipment aging, environmental changes, and load fluctuations. Thus, while improving the efficiency of feedback control, the accuracy of control is maximized, achieving efficient and precise feedback control.

[0034] Example 6: Based on Example 5, the closed-loop feedback unit further includes: The error recording subunit is used to record the time points when the feedback outlet temperature error is not equal to zero, and to generate an error log for storage by combining the corresponding control data. After adjusting the opening of the flow regulating valve based on the final target water spray volume, the steam temperature of the steam outlet module is monitored at high frequency to obtain the steam temperature change within the preset key monitoring period and to determine whether the steam temperature reaches the target saturated steam temperature within the preset key monitoring period. If the target is reached, the steam temperature monitoring frequency of the steam outlet module will return to normal. If the target saturated steam temperature is not reached, based on the steam temperature change, it is determined whether the real-time steam temperature of the steam outlet module is approaching the target saturated steam temperature. If so, it is determined that the feedback response trend reference table is lagging, and an update command is generated and sent to the compensation reference automatic update subunit to immediately update the feedback response trend reference table. If not, and the steam temperature remains constant, then the steam outlet module temperature detection device is determined to be abnormal, and a detection device fault signal is generated and sent to the remote terminal. Otherwise, a fault signal for the cooling equipment is generated and sent to the remote terminal.

[0035] The beneficial effects of the above technical solution are as follows: By fully recording the non-zero time points of feedback outlet temperature error and the corresponding control data, this invention generates an error log containing a complete record of data such as temperature deviation value, water spray volume adjustment, and steam parameters, providing data support for subsequent error cause tracing. Furthermore, within a preset key monitoring period (e.g., 5 seconds) after water spray volume adjustment, temperature data is collected at a high frequency (e.g., 100Hz), several times the normal frequency (e.g., 10Hz), which can capture minute temperature fluctuations, facilitating timely detection of feedback control deviations. The normal frequency is immediately restored after the steam outlet temperature reaches the target, reducing the data processing load. When the temperature fails to meet the target, the system first checks whether the adjusted steam outlet temperature is approaching the preset standard value. If so, it determines that the feedback response trend reference table is lagging and immediately triggers an update to the table, effectively avoiding errors in atomized water spray volume adjustment caused by incorrect predictions of steam temperature change trends within the reference feedback response time. When the temperature remains constant, it locks in the detection device for malfunction and generates a precise fault signal (e.g., BH100 temperature sensor malfunction) to automatically detect the operating status of the steam outlet temperature detection equipment. When the temperature change deviates in the opposite direction or changes repeatedly, it determines that the desuperheating equipment is malfunctioning (e.g., flow control valve jamming). This system achieves layered diagnosis of control errors during desuperheating control, providing a reference for maintenance personnel to pinpoint repairs, significantly shortening the troubleshooting time of the desuperheating system, and greatly reducing production losses caused by abnormal downtime.

[0036] Example 7: Based on Example 3, the instruction execution unit includes: The instruction receiving unit is used to receive and parse the water spray volume control instruction to determine the actual spray volume of atomized water. The control conversion unit is used to compare the actual spray demand of atomized water with the actual spray volume at that time to obtain the spray volume deviation, and combine the mapping relationship between the atomized water flow regulating valve and the spray volume to determine the adjustment amount of the flow regulating valve. An execution unit is used to regulate the opening degree of the control flow regulating valve based on the regulation amount.

[0037] The beneficial effects of the above technical solution are as follows: This invention receives and parses the water spray volume control command through the command receiving unit to determine the actual spray volume demand of atomized water. Then, the control conversion unit compares the actual spray volume demand of atomized water with the actual spray volume at that time to obtain the spray volume deviation. Combining the mapping relationship between the atomized water flow regulating valve and the spray volume, the adjustment amount of the flow regulating valve is determined, converting the demand of steam cooling water into the valve adjustment amount, effectively avoiding execution deviations caused by the nonlinearity of valve characteristics. Finally, the execution unit adjusts the opening of the control flow regulating valve based on the adjustment amount to achieve accurate control of the water spray volume.

[0038] Example 8: Based on Example 1, the atomized water supply module includes: The nozzle angle adaptive control unit is used to sense the rotation direction and rotation angle of the blades in real time based on sensors installed on the blades of the swirling mixing component. By using the design data of the mixing chamber, the initial positional relationship between each atomizing water nozzle and the corresponding swirling mixing component is determined; Based on the initial positional relationship, and combined with the rotation direction and rotation angle of the blades, the following movement parameters of each atomizing water nozzle are determined respectively. Based on the initial positional relationship, the relative distance between each nozzle and the corresponding swirling mixing component is determined, and the nozzle water mist spraying speed is obtained; Based on the water mist spraying speed and relative position distance of the nozzle, the lag time of the air-water mixture contacting the blade is determined; Based on real-time sensing of the blade's rotation direction and angle, the blade angular velocity of the swirling mixing component is calculated. Based on the blade angular velocity and lag time, the leading rotation error is obtained. Combined with the blade's single maximum rotation angle, the non-periodic error of the blade rotation is determined. Based on the preset blade angle-injection triggering relationship and non-periodic error, the injection-rotation non-cooperative error is determined; Based on the non-cooperative error between jetting and rotation, and combined with the blade angular velocity, the optimal initial injection time point for atomized water is determined. Once the swirl mixing component is activated and reaches the optimal initial injection time point, the following movement parameters are sent to the corresponding swirl mixing component of each atomized water nozzle to spray atomized water.

[0039] In this embodiment, the swirling mixing component includes at least three blades, which can rotate at an angle of 270°-360°.

[0040] In this embodiment, the following movement parameters refer to the set of dynamic parameters that the nozzle needs to be adjusted, calculated based on the initial positional relationship between the nozzle and the blades, combined with the real-time rotation direction and angle of the blades, to ensure that the atomizing water nozzle always maintains a preset relative position with the blades of the corresponding swirling mixing component (e.g., the nozzle's spray direction is always aligned with the effective mixing area of ​​the blades). Specifically, these parameters may include the nozzle's horizontal rotation angle adjustment, pitch angle adjustment, and movement speed, which drive the nozzle to move synchronously with the blades' rotation, ensuring that the water mist can continuously act on the optimal mixing position of the blades and avoiding spray position deviation caused by blade rotation.

[0041] In this embodiment, the jet-rotation non-coordinated error refers to the error caused by time difference, position deviation, etc., that prevents the atomized water from reaching the blade when the blade rotates to the angle corresponding to the preset blade angle-jet trigger relationship. The error directly reflects the degree of matching between the jet timing, nozzle position, and blade rotation state. The smaller the error, the higher the synergy of the air-water mixing.

[0042] In this embodiment, the preset blade angle-jet trigger relationship refers to the baseline mapping rule that is determined in advance through experiments or simulations, which states that when the blade of the swirling mixing component rotates to a specific angle, the corresponding atomizing water nozzle should trigger a jetting action. For example, the nozzle is opened when the blade rotates to 45 degrees.

[0043] In this embodiment, the optimal initial injection time point refers to the optimal moment when atomized water begins to be injected after the swirl mixing component is started, taking into account the non-coordinated error between spray and rotation, the blade angular velocity, and the lag time of water mist reaching the blade. At this time, the water mist injected can precisely match the optimal contact angle of the blade (e.g., the angle at which the blade faces the water mist) when it reaches the blade, maximizing the contact efficiency between the water mist and the blade, and avoiding mixing failure caused by injecting too early (water mist diffuses before contacting the blade) or too late (the blade has deviated from the contact area). This is the key node for achieving dynamic coordination between spray and rotation.

[0044] The beneficial effects of the above technical solution are as follows: First, the invention determines the initial positional relationship between the nozzle and the blade based on the design data of the mixing cavity. Then, it generates nozzle following movement parameters by combining the real-time sensing of the blade rotation direction and rotation angle by the sensor, ensuring that the nozzle always maintains a preset relative position with the blade and avoiding spatial misalignment. Next, it calculates the lag time (the time from when the atomized water is sprayed to when it touches the blade) by the nozzle water mist spraying speed and the relative distance between the nozzle and the blade. Then, it calculates the advance rotation error (i.e., the amount of rotation of the blade during the lag time) by combining the blade angular velocity, ensuring that the water mist can contact the blade in time after spraying. This effectively avoids the situation where the water mist diffuses before contacting the blade due to premature spraying or the blade has left the contact area due to delayed spraying, allowing each portion of atomized water to fully interact with the blade. Then, by combining the "maximum single rotation angle of the blade" to determine the non-periodic error (the irregular deviation of a single blade rotation; for example, if the leading rotation error is 2.5 times the maximum single rotation angle, then the 0.5 times maximum single rotation angle is the non-periodic error), the injection timing is finally corrected. This ensures that even if the blade rotation speed or angle fluctuates, the coordination between injection and rotation can be ensured through error compensation, avoiding uneven mixing caused by unstable blade rotation. This ensures that the desuperheating system can still stably output uniform low-temperature steam under varying operating conditions (such as the low-temperature steam pressure dropping from 0.3MPa to 0.2MPa).

[0045] Example 9: Based on Example 1, a precise temperature reduction control device further includes: The remote communication module is used to send the collected data and fault signals to a remote terminal for visual display, and to allow staff to remotely input cooling control parameters through the remote terminal to remotely adjust the parameters of the control device. The human-machine interface module is used to query de-temperature control parameters and historical data on a display screen connected to the control device, and to display steam parameters, atomized water injection volume, valve opening degree and fault alarm information in real time.

[0046] The beneficial effects of the above technical solution are as follows: This invention allows personnel to remotely control the device parameters directly via remote terminals (including computers, tablets, dedicated monitoring equipment, etc.) by inputting cooling control parameters (e.g., standard temperature) without needing to physically be present at the control device location. This enables flexible operation across workshops, factories, and even remote locations, significantly reducing on-site travel time and manpower costs. It is particularly suitable for cluster management of cooling devices deployed at multiple sites. Furthermore, this invention can simultaneously transmit data collected by the device (e.g., steam temperature, pressure, atomized water injection volume, valve opening, etc.) to multiple authorized remote terminals, allowing the maintenance team to simultaneously view the device's operating status from different positions (e.g., the central control room, technical department, maintenance duty room, etc.). This achieves multi-terminal collaborative work and information sharing, effectively avoiding operational coordination problems caused by information transmission delays and improving team collaboration efficiency. When a malfunction occurs in the unit (e.g., abnormal atomized water spray, temperature sensor failure, etc.), the remote communication module can immediately transmit the fault signal (including fault type, occurrence time, and abnormal data of related parameters) to the remote terminal. It also alerts staff through visual displays (e.g., pop-up alarms, red warning icons, fault code annotations), effectively shortening fault response time and preventing uncontrolled cooling due to delayed fault handling (e.g., steam overheating damaging downstream equipment) or production interruptions caused by unit shutdown, minimizing losses. Through the human-machine interface module, personnel can directly set and adjust cooling control parameters (e.g., target temperature threshold, pressure reduction, etc.) on the connected display screen, achieving visualization of the operation process, significantly shortening parameter configuration time. Furthermore, historical operating data (e.g., temperature change curves of past cooling processes, valve opening records, fault occurrence time and type, etc.) can be directly retrieved and queried, facilitating quick tracing of the unit's operating trajectory and providing a convenient data acquisition channel for analyzing cooling effects and optimizing control strategies. Furthermore, it can display core operating data such as steam parameters (e.g., steam temperature and pressure), atomized water injection volume, and valve opening in real time. Staff can intuitively grasp the current cooling status of the device, quickly determine whether the atomized water injection volume is insufficient or whether the valve opening needs to be adjusted, and promptly correct the control parameters. This can effectively avoid excessive or insufficient cooling due to parameter lag, providing a foundation for precise and controllable cooling process, thereby greatly improving the achievement rate of cooling targets.

[0047] Example 10: This invention provides a precise cooling control method, applied to the aforementioned precise cooling control device, such as... Figure 3 As shown, it includes: S1: High-temperature and high-pressure steam enters through the steam inlet pipe of the steam inlet module, and after being reduced to the preset pressure by the pressure reducing valve, it flows into the mixing module; S2: Real-time acquisition of steam temperature and pressure from the steam inlet module, and simultaneous acquisition of the temperature before atomized water injection. Combined with the target saturated steam temperature under the current operating conditions, the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection are obtained by looking up the table. S3: Obtain the mass flow rate of the steam after depressurization at the steam inlet module. Based on the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection, and combined with the mass flow rate of the steam after depressurization at the steam inlet module, calculate the target spray volume of the atomized water supply module. S4: Controls the atomized water supply module to spray the target amount of atomized water into the mixing module; S5: The depressurized steam and atomized water are mixed and the droplets are dispersed through the mixing module to obtain de-cooled steam; S6: Outputs de-cooled steam through the steam outlet module.

[0048] The beneficial effects of the above technical solution are as follows: This invention uses a steam inlet module to depressurize high-temperature and high-pressure steam, stabilizing fluctuating steam pressure within a preset range. This avoids imbalances in the steam-water contact ratio within the mixing module caused by sudden changes in steam pressure, providing a stable pressure environment for the uniform mixing of atomized water and steam. This reduces the problem of excessive or insufficient local cooling caused by pressure fluctuations from the source. During the mixing process of atomized water and steam, the mixing module simultaneously performs droplet dispersion treatment, which can effectively reduce the atomized water particle size and increase the contact area between steam and atomized water. This effectively overcomes the defect in traditional mixing structures where large-diameter droplets cannot fully contact the steam. At the same time, the dispersed droplets can mix more evenly with the steam, effectively eliminating the coexistence of high-temperature steam zones and supercooled water masses in the mixing chamber, ensuring the most consistent steam temperature distribution after cooling, and eliminating the risk of local temperature deviations. By controlling the real-time steam temperature and pressure of the steam inlet module and simultaneously collecting the temperature before atomized water injection, combined with the target saturated steam temperature under the current operating conditions, and by looking up tables (including the "Steam Enthalpy Table" and the "Water Enthalpy Table"), the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection are obtained. Combined with the mass flow rate of the steam after pressure reduction, the cooling water injection quantity (i.e., the target injection quantity) of the atomized water supply module is calculated. While predicting the theoretical injection quantity in advance based on the real-time energy state of the steam, the injection quantity can also be dynamically corrected by the outlet temperature error. This effectively solves the problems of lag in injection quantity adjustment and inability to match changes in steam state in traditional control methods, ensuring that the injection quantity is always precisely matched with the steam de-cooling demand, and greatly improving the steam de-cooling accuracy. Subsequently, the atomized water supply module sprays atomized water based on the precise instructions of the control module. This avoids the problem of excessive water spraying causing the steam to carry excess moisture or insufficient water spraying causing the cooling to fail to meet the standard. The appropriate amount of atomized water, combined with the thorough mixing design of the mixing module, ensures that the atomized water can completely exchange heat with the steam and vaporize, ensuring that the dryness of the steam after cooling meets the requirements of industrial steam (e.g., ≥97% in the power and chemical industries). This avoids excess moisture causing corrosion and scaling to subsequent steam-using equipment (e.g., steam turbines, heat exchangers), which helps to extend the service life of the equipment.

[0049] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A precise temperature reduction control device, characterized in that, include: Steam inlet module, mixing module, control module, atomized water supply module, and steam outlet module; The steam inlet module is used to connect high-temperature and high-pressure steam and to reduce the pressure of the steam. The mixing module is used to mix the depressurized steam with atomized water and to disperse the droplets to obtain de-cooled steam. The control module is used to collect the real-time steam temperature and pressure of the steam inlet module and simultaneously collect the temperature before the atomized water is injected. Combined with the target saturated steam temperature under the current operating conditions, the enthalpy value of the current superheated steam, the enthalpy value of the target saturated steam, and the enthalpy value before the atomized water is injected are obtained by looking up a table. The target water injection volume is calculated, and the corresponding water injection volume control command is generated and sent to the atomized water supply module. The atomized water supply module is used to spray atomized water into the mixing module based on the water spray volume control command; The steam outlet module is used to output de-cooled steam.

2. The precise cooling control device according to claim 1, characterized in that, The mixing module includes: a mixing cavity; The mixing chamber is used to guide the mixture of atomized water and steam to form a swirling flow, which is then dispersed by the droplet dispersing structure.

3. The precise cooling control device according to claim 1, characterized in that, The control module includes: The data acquisition unit is used to collect the real-time steam temperature and pressure of the steam inlet module and the steam outlet module, and simultaneously collect the temperature before atomized water injection and the mass flow rate of steam after pressure reduction. Based on the target saturated steam temperature under the pressure of the steam inlet module, the real-time steam temperature of the steam inlet module, and the temperature before atomized water injection, the enthalpy of the current superheated steam and the enthalpy of the target saturated steam are obtained by looking up the table. The feedforward calculation unit is used to calculate the target spray volume of the atomized water supply module based on the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection, combined with the mass flow rate of the steam after pressure reduction at the steam inlet module. The closed-loop feedback unit is used to compare the real-time steam temperature of the steam outlet module with the target saturated steam temperature to obtain the feedback outlet temperature error, and to correct the target water spray volume based on the feedback outlet temperature error to obtain the final target water spray volume. The instruction generation unit is used to generate corresponding water spray volume control instructions based on the target water spray volume or the final target water spray volume, and send them to the instruction execution unit. Among them, the final target water spray volume has a higher priority than the target water spray volume; The instruction execution unit is connected to the atomizing water flow regulating valve to receive water spray volume control instructions and adjust the opening degree of the control flow regulating valve according to the water spray volume control instructions.

4. The precise cooling control device according to claim 3, characterized in that, The closed-loop feedback unit includes: The water spray volume correction subunit is used to obtain the temperature change trend characteristics of the most similar steam based on the deviation direction corresponding to the current temperature deviation critical point of the steam outlet module and the mass flow rate of the steam after pressure reduction, and by referring to the feedback response trend reference table. Based on the steam temperature change trend characteristics of the maximum similarity, combined with the actual steam temperature corresponding to the temperature deviation connection point, the steam temperature change of the steam outlet module within the feedback response interval is predicted, and the feedback response temperature difference is obtained. Based on the feedback response temperature difference, the feedback outlet temperature error is corrected to obtain the final feedback temperature difference; Based on the final feedback temperature difference and the target saturated steam temperature, the final feedback steam temperature of the steam outlet module is obtained. Combined with the pressure of the steam outlet module, the actual outlet steam enthalpy value is obtained by looking up a table. The compensated enthalpy is obtained based on the actual outlet steam enthalpy and the target saturated steam enthalpy. The real-time steam enthalpy of the steam outlet module is corrected based on the compensation enthalpy value to obtain the required steam enthalpy value. The required steam enthalpy value is then sent to the feedforward calculation unit for calculation to obtain the final target water spray volume.

5. The precise cooling control device according to claim 4, characterized in that, The closed-loop feedback unit also includes: The compensation reference automatic update subunit is used to obtain multiple historical feedback control data of the steam outlet module within a preset time. Based on the historical feedback control data, corresponding control temperature curves are generated respectively, and the temperature deviation critical point and the atomized water correction spray volume injection node are determined on each control temperature curve respectively. Based on the temperature deviation critical point and the atomized water correction spray volume injection node, each control temperature curve is truncated to obtain multiple feedback response interval temperature change sub-curves. Based on the mass flow rate of steam after pressure reduction, multiple feedback response interval temperature change sub-curves are grouped to obtain multiple feedback curve groups. Then, according to the deviation direction of the temperature deviation critical point corresponding to each feedback response interval temperature change sub-curve, the deviation type within the feedback curve group is classified to obtain incremental feedback curve sub-data groups and decremental feedback curve sub-data groups. The data within the incremental feedback curve sub-data group and the decremental feedback curve sub-data group were compared and aligned within the group. Based on the comparison results, the steam temperature change trend characteristics of the steam outlet module within the feedback response interval were obtained. Based on the results of the two groupings and the characteristics of the steam temperature change trend, a feedback response trend reference table is generated and stored. Based on a preset update cycle, the latest historical feedback control data is obtained to automatically update the feedback response trend reference table.

6. The precise cooling control device according to claim 5, characterized in that, The closed-loop feedback unit also includes: The error recording subunit is used to record the time points when the feedback outlet temperature error is not equal to zero, and to generate an error log for storage by combining the corresponding control data. After adjusting the opening of the flow regulating valve based on the final target water spray volume, the steam temperature of the steam outlet module is monitored at high frequency to obtain the steam temperature change within the preset key monitoring period and to determine whether the steam temperature reaches the target saturated steam temperature within the preset key monitoring period. If the target is reached, the steam temperature monitoring frequency of the steam outlet module will return to normal. If the target saturated steam temperature is not reached, based on the steam temperature change, it is determined whether the real-time steam temperature of the steam outlet module is approaching the target saturated steam temperature. If so, it is determined that the feedback response trend reference table is lagging, and an update command is generated and sent to the compensation reference automatic update subunit to immediately update the feedback response trend reference table. If not, and the steam temperature remains constant, then the steam outlet module temperature detection device is determined to be abnormal, and a detection device fault signal is generated and sent to the remote terminal. Otherwise, a fault signal for the cooling equipment is generated and sent to the remote terminal.

7. The precise cooling control device according to claim 3, characterized in that, Instruction execution unit, including: The instruction receiving unit is used to receive and parse the water spray volume control instruction to determine the actual spray volume of atomized water. The control conversion unit is used to compare the actual spray demand of atomized water with the actual spray volume at that time to obtain the spray volume deviation, and combine the mapping relationship between the atomized water flow regulating valve and the spray volume to determine the adjustment amount of the flow regulating valve. An execution unit is used to regulate the opening degree of the control flow regulating valve based on the regulation amount.

8. The precise cooling control device according to claim 1, characterized in that, The atomized water supply module includes: The nozzle angle adaptive control unit is used to sense the rotation direction and rotation angle of the blades in real time based on sensors installed on the blades of the swirling mixing component. By using the design data of the mixing chamber, the initial positional relationship between each atomizing water nozzle and the corresponding swirling mixing component is determined; Based on the initial positional relationship, and combined with the rotation direction and rotation angle of the blades, the following movement parameters of each atomizing water nozzle are determined respectively. Based on the initial positional relationship, the relative distance between each nozzle and the corresponding swirling mixing component is determined, and the nozzle water mist spraying speed is obtained; Based on the water mist spraying speed and relative position distance of the nozzle, the lag time of the air-water mixture contacting the blade is determined; Based on real-time sensing of the blade's rotation direction and angle, the blade angular velocity of the swirling mixing component is calculated. Based on the blade angular velocity and lag time, the leading rotation error is obtained. Combined with the blade's single maximum rotation angle, the non-periodic error of the blade rotation is determined. Based on the preset blade angle-injection triggering relationship and non-periodic error, the injection-rotation non-cooperative error is determined; Based on the non-cooperative error between jetting and rotation, and combined with the blade angular velocity, the optimal initial injection time point for atomized water is determined. Once the swirl mixing component is activated and reaches the optimal initial injection time point, the following movement parameters are sent to the corresponding swirl mixing component of each atomized water nozzle to spray atomized water.

9. The precise cooling control device according to claim 1, characterized in that, Also includes: The remote communication module is used to send the collected data and fault signals to a remote terminal for visual display, and to allow staff to remotely input cooling control parameters through the remote terminal to remotely adjust the parameters of the control device. The human-machine interface module is used to query de-temperature control parameters and historical data on a display screen connected to the control device, and to display steam parameters, atomized water injection volume, valve opening degree and fault alarm information in real time.

10. A precise cooling control method, applied to the precise cooling control device according to any one of claims 1-9, characterized in that, include: S1: High-temperature and high-pressure steam enters through the steam inlet pipe of the steam inlet module, and after being reduced to the preset pressure by the pressure reducing valve, it flows into the mixing module; S2: Real-time acquisition of steam temperature and pressure from the steam inlet module, and simultaneous acquisition of the temperature before atomized water injection. Combined with the target saturated steam temperature under the current operating conditions, the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection are obtained by looking up the table. S3: Obtain the mass flow rate of the steam after depressurization at the steam inlet module. Based on the enthalpy of the current superheated steam, the enthalpy of the target saturated steam, and the enthalpy of the atomized water before injection, and combined with the mass flow rate of the steam after depressurization at the steam inlet module, calculate the target spray volume of the atomized water supply module. S4: Controls the atomized water supply module to spray the target amount of atomized water into the mixing module; S5: The depressurized steam and atomized water are mixed and the droplets are dispersed through the mixing module to obtain de-cooled steam; S6: Outputs de-cooled steam through the steam outlet module.

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