Wall temperature prediction-based desuperheating water control system and method

By using a desuperheating water control system based on wall temperature prediction, the opening degree of the desuperheating water is monitored and adjusted in real time, which solves the problem of uneven wall temperature in the superheater and reheater, reduces equipment damage rate and operating pressure, and improves the working efficiency of thermal power units.

CN115789625BActive Publication Date: 2025-11-25HUANENG LANZHOU THERMAL POWER CO LTD
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202211463935.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-11-22
Publication Date
2025-11-25
Estimated Expiration
2042-11-22

AI Technical Summary

Technical Problem

In existing thermal power generating units, the uneven local wall temperature of the superheater and reheater leads to a high rate of equipment damage, puts great pressure on operators to monitor the equipment, and affects equipment safety and working efficiency.

Method used

A desuperheating water control system based on wall temperature prediction is adopted. Through the data analysis and adjustment module of the wall temperature prediction system and the control terminal, the opening degree of the desuperheating water is monitored and controlled in real time, reducing the labor intensity of manual operation and realizing automated adjustment.

Benefits of technology

It effectively reduced the equipment damage rate, reduced the monitoring pressure on operators, improved work efficiency, and ensured the safe and stable operation of thermal power units.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN115789625B_ABST
    Figure CN115789625B_ABST
Patent Text Reader

Abstract

The embodiment of the specification provides a desuperheating water control system and method based on wall temperature prediction, wherein the system comprises a superheating end, a reheating end, a desuperheating water control end, a wall temperature prediction system end, a wall temperature control end and a service end; the service end is connected with the desuperheating water control end and the wall temperature control end; the wall temperature control end is connected with the superheating end, the reheating end and the wall temperature prediction system end through a data signal; and the desuperheating water control end is connected with the superheating end, the reheating end and the wall temperature prediction system end through a data signal. Temperature data analysis is performed through the wall temperature prediction system end, data analysis is conveniently transmitted in real time, and the problem of easy burning and overtemperature of a boiler is solved through joint control of the wall temperature control end and the service end.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This document relates to the field of desuperheating water control system technology, and in particular to a desuperheating water control system and method based on wall temperature prediction. Background Technology

[0002] A thermal power plant, or simply a thermal power plant, is a factory that uses combustible materials (such as coal) as fuel to produce electricity. Thermal power generation refers to the use of the heat energy generated when fuels such as coal are burned to heat water, turning the water into high-temperature, high-pressure steam, which then drives a generator to generate electricity. Thermal power generator sets mainly include equipment such as boilers, steam turbines, generators, coal mills, and control systems.

[0003] Currently, the rupture of superheater and reheater tubes in thermal power generating units is one of the important causes of abnormal shutdowns of these units, seriously affecting their safe and economical operation. Furthermore, superheater and reheater tube failures are quite common in large power plants. Superheater failure types mainly include short-term and long-term overheating, and many failure modes are directly or indirectly related to the superheater wall temperature. For superheaters and reheaters operating at high temperatures, controlling tube wall overheating is one of the primary issues to be addressed during operation. Currently, the desuperheating water system automatically controls the superheater outlet temperature, but in actual operation, operators intervene in the desuperheating water control at the location with the highest wall temperature, which is also the location with the largest thermal deviation. Even when the superheater and reheater temperatures are at normal levels, numerous uneven factors throughout the area can cause localized excessively high wall temperatures in the superheater and reheater, affecting their safety. Therefore, under these operating conditions, the desuperheating water cannot be supplied automatically and stably for a long period of time, resulting in high pressure on operators to monitor the equipment, a high rate of equipment damage, and affecting the normal operation of the thermal power unit. Furthermore, the operating efficiency is low. Therefore, it is necessary to provide a desuperheating water control system based on wall temperature prediction to solve this problem. Summary of the Invention

[0004] This invention provides a desuperheating water control system and method based on wall temperature prediction, aiming to solve the above-mentioned problems.

[0005] This invention provides a desuperheating water control system based on wall temperature prediction, comprising: a superheating end, a reheating end, a desuperheating water control end, a wall temperature prediction system end, a wall temperature control end, and a server end;

[0006] The superheated end is connected to the wall temperature control end and the desuperheating water control end, and is used to collect the first temperature data and send it to the desuperheating water control end.

[0007] The reheat end is connected to the wall temperature control end and the desuperheating water control end, and is used to collect second temperature data and send it to the desuperheating water control end.

[0008] The desuperheating water control terminal is connected to the server, wall temperature control terminal, reheat terminal, and superheat terminal. It is used to perform desuperheating operations by receiving desuperheating commands sent by the server, and to receive first temperature data and second temperature data to generate configuration data and transmit the configuration data to the wall temperature prediction system terminal.

[0009] The wall temperature prediction system is connected to the desuperheating water control terminal and the wall temperature control terminal. It is used to generate wall temperature prediction information based on the first temperature data and the second temperature data, and send the wall temperature prediction information to the wall temperature control terminal.

[0010] The wall temperature control terminal is connected to the wall temperature prediction system terminal, the reheat terminal, the superheat terminal, and the server terminal. It is used to determine the wall temperature status based on the first temperature data, the second temperature data, and the wall temperature prediction information, and to control the wall temperature according to the wall temperature status.

[0011] The server connects to the wall temperature control terminal and the desuperheating water control terminal, and is used to send desuperheating commands to the desuperheating water control terminal according to the wall temperature status.

[0012] This invention provides a method for controlling desuperheating water based on wall temperature prediction, comprising:

[0013] S1. The superheated end and the reheated end transmit their first and second temperature data during operation to the desuperheating water control end.

[0014] S2. The desuperheating water control terminal receives the first temperature data and the second temperature data to generate configuration data, and transmits the configuration data to the wall temperature prediction system terminal.

[0015] S3. The wall temperature prediction system generates wall temperature prediction information based on the first temperature data and the second temperature data, and sends the wall temperature prediction information to the wall temperature control terminal.

[0016] S4. The wall temperature control terminal determines the wall temperature status based on the first temperature data, the second temperature data, and the wall temperature prediction information. Based on the wall temperature status, the wall temperature is controlled through the server, the adaptive heating adjustment module, the wall temperature protection quick-opening control module, and the wall temperature leveling module.

[0017] The wall temperature prediction information generated by the wall temperature prediction system in this embodiment of the invention facilitates real-time data analysis and transmission, effectively reducing the labor intensity of manual operation and improving work efficiency. The wall temperature control terminal determines the wall temperature status based on the first temperature data, the second temperature data, and the predicted wall temperature information, and controls the wall temperature accordingly. This effectively adjusts the opening of the desuperheater, facilitating its long-term stable automatic operation, reducing the monitoring pressure on operators, effectively lowering the equipment damage rate, preventing disruption to the normal operation of the thermal power unit, and effectively improving work efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in one or more embodiments of this specification or in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a desuperheating water control system based on wall temperature prediction according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the overheated end in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the reheat end according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the desuperheating water control terminal according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the wall temperature prediction system terminal according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the wall temperature control terminal according to an embodiment of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, and not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this document.

[0026] System Implementation Examples

[0027] This invention provides a desuperheating water control system based on wall temperature prediction. Figure 1 This is a schematic diagram of a desuperheating water control system based on wall temperature prediction, according to an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a desuperheating water control system based on wall temperature prediction, which specifically includes:

[0028] Superheated end, reheated end, desuperheating water control end, wall temperature prediction system end, wall temperature control end, and server end;

[0029] The superheated end is connected to the wall temperature control end and the desuperheating water control end, and is used to collect the first temperature data and send it to the desuperheating water control end.

[0030] The reheat end is connected to the wall temperature control end and the desuperheating water control end, and is used to collect second temperature data and send it to the desuperheating water control end.

[0031] The desuperheating water control terminal is connected to the server, wall temperature control terminal, reheat terminal, and superheat terminal. It is used to perform desuperheating operations by receiving desuperheating commands sent by the server, and to receive first temperature data and second temperature data to generate configuration data and transmit the configuration data to the wall temperature prediction system terminal.

[0032] The wall temperature prediction system is connected to the desuperheating water control terminal and the wall temperature control terminal. It is used to generate wall temperature prediction information based on the first temperature data and the second temperature data, and send the wall temperature prediction information to the wall temperature control terminal.

[0033] The wall temperature control terminal is connected to the wall temperature prediction system terminal, reheat terminal, superheat terminal and server terminal. It is used to determine the wall temperature status based on the first temperature data, the second temperature data and the wall temperature prediction information, and control the wall temperature according to the wall temperature status.

[0034] The server connects to the wall temperature control terminal and the desuperheating water control terminal, and is used to send desuperheating commands to the desuperheating water control terminal according to the wall temperature status.

[0035] The wall temperature control unit includes a first data receiving module, a wall temperature protection quick-opening control module, an adaptive heating adjustment module, a data integration module, a fourth data transmission module, a data judgment module, and a wall temperature leveling module. The first data receiving module is connected to the wall temperature prediction system and the wall temperature protection quick-opening control module. The first data receiving module is also signal-connected to the wall temperature prediction system and the data judgment module. The data judgment module is signal-connected to the fourth data transmission module, the data judgment module, and the wall temperature leveling module. The wall temperature protection quick-opening control module and the wall temperature leveling module are connected to the adaptive heating adjustment module via data signals. The adaptive heating adjustment module is connected to the data integration module via data signals. The data integration module is connected to the fourth data transmission module. The adaptive heating adjustment module includes an air volume adjustment module, a fuel quantity adjustment module, and an oxygen quantity adjustment module. The air volume adjustment module, fuel quantity adjustment module, and oxygen quantity adjustment module are all connected to their external supporting equipment, which facilitates the regulation of wall temperature by adjusting load changes such as air volume, fuel quantity, and oxygen quantity according to temperature changes, effectively realizing the regulation of the desuperheating water opening.

[0036] The wall temperature prediction system includes a second data receiving module, a wall temperature prediction module, a curve model dynamic module, and a third data transmission module. The second data receiving module is connected to the desuperheating water control terminal and the wall temperature prediction module. The wall temperature prediction module is connected to the curve model dynamic module via data signals. The curve model dynamic module is connected to the third data transmission module. The wall temperature prediction module includes a load module, a real-time temperature module, and a temperature change rate module. The load module, real-time temperature module, and temperature change rate module are respectively connected to the curve model dynamic module via data signals, which facilitates the recording of the rate of change obtained under different loads, different real-time temperatures, and under conditions of constant temperature variation. This effectively enables the curve model dynamic module to accurately record various parameter data, facilitating wall temperature prediction and control.

[0037] Figure 2 This is a schematic diagram of the overheated end according to an embodiment of the present invention. Figure 2 As shown, the superheated end of this embodiment of the invention includes: a primary superheater, a screen-type superheater, a final superheater, a temperature sensor, and a data transmission module. The primary superheater, the screen-type superheater, and the final superheater are all connected to the temperature sensor. The temperature sensor is connected to the data transmission module via a data signal to facilitate heating of the steam.

[0038] Figure 3 This is a schematic diagram of the reheat end according to an embodiment of the present invention. Figure 3 As shown, the reheating end includes: a low-temperature reheater, a final-stage reheater, a second temperature sensor, and a second data transmission module. Both the low-temperature reheater and the final-stage reheater are connected to the second temperature sensor, which is connected to the second data transmission module via a data signal to facilitate the heating of steam.

[0039] Figure 4 This is a schematic diagram of the desuperheating water control terminal according to an embodiment of the present invention. Figure 4 As shown, the desuperheating water control terminal includes: a primary desuperheater, a secondary desuperheater, a superheater / reheater wall temperature control loop module, and a fourth data transmission module. The primary and secondary desuperheaters are both connected to the server. The reheater wall temperature control loop module is connected to the superheater and reheater signals. The reheater wall temperature control loop module is connected to the wall temperature prediction system terminal through the fourth data transmission module. The desuperheating water valve is opened through the primary and secondary desuperheaters to facilitate the normal operation of the thermal power unit.

[0040] Figure 5 This is a schematic diagram of the wall temperature prediction system terminal according to an embodiment of the present invention. Figure 5As shown, the wall temperature prediction system includes: a second data receiving module, a wall temperature prediction module, a curve model dynamic module, and a third data transmission module. The second data receiving module is connected to the desuperheating water control terminal and the wall temperature prediction module. The wall temperature prediction module is connected to the curve model dynamic module via data signals. The curve model dynamic module is connected to the third data transmission module. The wall temperature prediction module includes: a load module, a real-time temperature module, and a temperature change rate module. The load module, real-time temperature module, and temperature change rate module are respectively connected to the curve model dynamic module via data signals, which facilitates the recording of the change rate obtained under different loads, different real-time temperatures, and under conditions of inconvenient temperature changes. This effectively enables the curve model dynamic module to accurately record various parameter data, facilitating wall temperature prediction and control.

[0041] Figure 6 This is a schematic diagram of the wall temperature control terminal according to an embodiment of the present invention. Figure 6 As shown, the wall temperature control terminal includes: a first data receiving module, a wall temperature protection quick-opening control module, an adaptive heating adjustment module, a data integration module, a fourth data transmission module, a data judgment module, and a wall temperature leveling module. The first data receiving module is signal-connected to the wall temperature prediction system terminal and the data judgment module. The data judgment module is signal-connected to the fourth data transmission module, the data judgment module, and the wall temperature leveling module, respectively. The wall temperature protection quick-opening control module and the wall temperature leveling module are respectively connected to the adaptive heating adjustment module through data signals. The adaptive heating adjustment module is connected to the data integration module through data signals. The data integration module is connected to the fourth data transmission module.

[0042] This invention establishes a wall temperature prediction system and a wall temperature control system. The wall temperature prediction system receives data via a second data receiving module and transmits this information to the wall temperature prediction module. The wall temperature prediction module analyzes and integrates the data through its temperature module, generating corresponding feedforward signals for different transmitted temperatures and rates of temperature change. Data analysis is performed through a curve model dynamic module, and the information is transmitted to the wall temperature control system via a third data transmission module. The wall temperature control system receives the information through a first data receiving module. When the information received by the wall temperature control system is transmitted to the judgment module, and the temperature is determined to be over-temperature, a wall temperature protection quick-opening control module is activated to prevent the desuperheating water in the primary and secondary desuperheaters from fully opening. Subsequently, the airflow regulation module, fuel quantity regulation module, and oxygen quantity regulation module in the adaptive heating regulation module adjust the required airflow, fuel quantity, and oxygen quantity based on the current temperature readings from the curve model dynamic module. The system is adjusted to lower the temperature. Then, the server issues commands to the primary and secondary desuperheaters to open their valves at appropriate intervals. This ensures the main parameters of the unit stabilize quickly and maintains the wall temperature within a reasonable range. When there is a significant temperature difference between the two sides detected by temperature sensors 1 and 2, the data judgment module indicates that the boiler is burning unevenly. If the steam temperature deviation between the two sides is large, the real-time temperature module and temperature change module of the wall temperature prediction module will predict the temperature difference. The curve model dynamic module will then analyze the data and transmit the information to the wall temperature control terminal via the data transmission module 3. By introducing a wall temperature leveling module and using the adaptive heating adjustment module of the wall temperature control terminal, the wall temperature is leveled off on both sides of the furnace. This allows the server to adjust the opening degree of the primary and secondary desuperheaters separately, ensuring that the desuperheating water regulation has a certain margin and preventing the desuperheating water valve from being fully opened.

[0043] By employing the embodiments of the present invention, the following beneficial effects are achieved:

[0044] 1. Temperature data analysis is performed through the wall temperature prediction module and curve model dynamic module of the wall temperature prediction system, which facilitates the real-time transmission of data analysis, effectively reducing the labor intensity of manual operation and improving work efficiency.

[0045] 2. The wall temperature protection quick-opening control module and the air volume regulation module, fuel quantity regulation module, and oxygen quantity regulation module in the adaptive heating regulation module of the wall temperature control terminal are used to predict and control the load changes. The wall temperature prediction intelligent identification of load changes is designed, and the output is controlled through appropriate adjustment mechanisms to improve the steam temperature regulation quality during load changes. This makes it easier to incorporate wall temperature control into the load variables, ensuring that the main parameters of the unit are quickly stabilized while controlling the wall temperature within a reasonable range to facilitate its normal operation.

[0046] 3. By using the wall temperature leveling module, when the boiler is burning unevenly and the steam temperature on both sides deviates greatly, the adaptive heating adjustment module of the wall temperature control terminal is used to adjust the temperature, thereby leveling the temperature on both sides of the furnace. This makes it easier to control the opening degree of the valves of the primary and secondary desuperheaters through the server terminal, ensuring that the desuperheating water adjustment has a certain margin and avoiding the desuperheating water valves from being fully opened.

[0047] Method Implementation Examples

[0048] This invention provides a method for controlling desuperheating water based on wall temperature prediction, comprising:

[0049] S1, the superheated end and the reheated end transmit their first temperature data and second temperature data during operation to the desuperheating water control end; S1 specifically includes: the first-stage superheater, the screen-type superheater, the final-stage superheater and the low-temperature reheater in the superheated end and the reheated end, and transmit their operating temperature to the desuperheating water control end through the first data transmission module and the second data transmission module via temperature sensor one and temperature sensor two.

[0050] S2. The desuperheating water control terminal receives the first temperature data and the second temperature data to generate configuration data, and transmits the configuration data to the wall temperature prediction system terminal. Step S2 specifically includes: the desuperheating water control terminal connects the superheater metal wall temperature control loop interface between the superheater and reheater wall temperature control loop module and the hot end and reheater end, configures the superheater metal wall temperature control loop, and feeds forward the data of the superheater wall temperature control loop module to the fuel quantity control, air volume control and oxygen quantity control of the desuperheating water control terminal and the adaptive heating adjustment module to facilitate data transmission, and transmits it to the wall temperature prediction system terminal through the data transmission module four.

[0051] S3. The wall temperature prediction system generates wall temperature prediction information based on the first temperature data and the second temperature data, and sends the wall temperature prediction information to the wall temperature control terminal. The wall temperature prediction system transmits its information to the wall temperature prediction module through the second data receiving module. The wall temperature prediction module performs corresponding feedforward logic for different loads, different temperatures, and different temperature change rates based on the data fed back by the superheater and reheater wall temperature control loop module through the load module, real-time temperature module, and temperature change rate module. It performs data analysis and comparison through the curve model dynamic module, and transmits its information to the wall temperature control terminal through the third data transmission module.

[0052] S4. The wall temperature control terminal determines the wall temperature status based on the first temperature data, the second temperature data, and the wall temperature prediction information. Based on the wall temperature status, it controls the wall temperature through the server, the adaptive heating adjustment module, the wall temperature protection quick-opening control module, and the wall temperature leveling module. S4 specifically includes:

[0053] The wall temperature control terminal receives data through the first data receiving module. When the temperature detected by temperature sensor one and temperature sensor two is within the normal range, it is confirmed by the data judgment module and then transmitted to the server through the fourth data transmission module. The server issues an instruction to open the valve appropriately through the first-stage and second-stage desuperheaters.

[0054] When the information received by the wall temperature control terminal through the data receiving module 1 is transmitted to the data judgment module, if the temperature detected by temperature sensor 1 and temperature sensor 2 both exceed the set value, the temperature value is judged to be over-temperature. In order to prevent the desuperheating water of the first-stage desuperheater and the second-stage desuperheater from being fully opened, the wall temperature protection quick-opening control module is started. Then, the air volume adjustment module, fuel quantity adjustment module, and oxygen quantity adjustment module in the adaptive heating adjustment module adjust according to the data of air volume, fuel quantity, and oxygen quantity required at this temperature in the curve model dynamic module, so as to reduce the temperature and ensure that the main parameters of the unit are quickly stabilized while controlling the wall temperature within a reasonable range.

[0055] After the information received by the first data receiving module is transmitted to the data judgment module, the temperature difference between the temperature detected by temperature sensor one and temperature sensor two is large. The temperature value is judged to be in a state of boiler uneven burning. At this time, the steam temperature deviation on both sides of the furnace is large. Through the wall temperature leveling logic of the wall temperature leveling module, the adaptive heating adjustment module of the wall temperature control terminal makes appropriate adjustments to the air volume adjustment module, fuel quantity adjustment module, and oxygen quantity adjustment module, so that the wall temperature levels the temperature on both sides of the furnace. This makes it easier to adjust the opening degree of the valves of the first-stage desuperheater and the second-stage desuperheater separately through the server terminal, ensuring that the desuperheating water adjustment has a certain margin and avoiding the desuperheating water valve from being fully opened.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A desuperheating water control system based on wall temperature prediction, applied in a thermal power generating unit, characterized in that, include: Superheated end, reheated end, desuperheating water control end, wall temperature prediction system end, wall temperature control end, and server end; The superheated end is connected to the wall temperature control end and the desuperheating water control end, and is used to collect first temperature data and send it to the desuperheating water control end. The reheating end is connected to the wall temperature control end and the desuperheating water control end, and is used to collect second temperature data and send it to the desuperheating water control end. The cooling water control terminal is connected to the server terminal, wall temperature control terminal, reheat terminal, and superheat terminal. It is used to perform cooling operations by receiving cooling commands sent by the server terminal, and to receive the first temperature data and the second temperature data to generate configuration data, and to transmit the configuration data to the wall temperature prediction system terminal. The wall temperature prediction system terminal is connected to the desuperheating water control terminal and the wall temperature control terminal, and is used to generate wall temperature prediction information based on the first temperature data and the second temperature data, and send the wall temperature prediction information to the wall temperature control terminal. The wall temperature control terminal is connected to the wall temperature prediction system terminal, the reheat terminal, the superheat terminal, and the server terminal. It is used to determine the wall temperature status based on the first temperature data, the second temperature data, and the wall temperature prediction information, and to control the wall temperature based on the wall temperature status. The server is connected to the wall temperature control terminal and the desuperheating water control terminal, and is used to send a desuperheating command to the desuperheating water control terminal according to the wall temperature status. The desuperheating water control terminal specifically includes: a primary desuperheater, a secondary desuperheater, a superheater / reheater wall temperature control loop module, and a fourth data transmission module; The primary and secondary coolers are connected to the server and are used to receive cooling commands from the server to perform cooling operations. The superheater wall temperature control loop module is connected to the superheater end and the reheater end via the superheater metal wall temperature control loop interface. It is used to receive the first temperature data and the second temperature data, configure the superheater metal wall temperature control loop, generate configuration data, and provide feedforward signals to the fuel quantity control, air volume control and oxygen quantity control of the adaptive heating adjustment module of the desuperheating water control end and the wall temperature control end through the configuration data. The fourth data transmission module is connected to the wall temperature prediction system and is used to send the configuration data to the wall temperature prediction system.

2. The system according to claim 1, characterized in that, The wall temperature prediction system specifically includes: a second data receiving module, a wall temperature prediction module, a curve model dynamic module, and a third data transmission module; The second data receiving module is connected to the fourth data transmission module and is used to receive configuration data sent by the fourth data transmission module. The wall temperature prediction module is connected to the second data receiving module and is used to generate feedforward logic data based on the configuration data for different loads, different temperatures and different rates of temperature change. The curve model dynamic module, connected to the wall temperature prediction module, is used to generate curve model data after analyzing and comparing the feedforward logic data. The third data transmission module is connected to the curve model dynamic module and is used to send the curve model data to the wall temperature control terminal.

3. The system according to claim 2, characterized in that, The wall temperature prediction module specifically includes a load module, a real-time temperature module, and a temperature change rate module; the load module, the real-time temperature module, and the temperature change rate module are respectively connected to the curve model dynamic module through data signals.

4. The system according to claim 2, characterized in that, The wall temperature control terminal specifically includes: a first data receiving module, a data judgment module, a wall temperature leveling module, a wall temperature protection quick-opening control module, an adaptive heating adjustment module, a data integration module, and a fourth data transmission module; The first data receiving module is connected to the third data transmission module and is used to receive curve model data sent by the third data transmission module; The data judgment module is connected to the first data receiving module, the wall temperature leveling module and the wall temperature protection quick-opening control module, and is used to judge the first temperature data and the second temperature data according to the curve model data, so as to obtain the wall temperature status. The wall temperature leveling module is connected to the data judgment module, the wall temperature protection quick-opening control module, and the adaptive heating adjustment module. It is used to adjust the adaptive heating adjustment module according to the wall temperature status through preset wall temperature leveling logic. The wall temperature protection quick-opening control module is connected to the data judgment module, the wall temperature leveling module, and the adaptive heating adjustment module, and is used to control the switching of the first-stage desuperheater and the second-stage desuperheater. An adaptive heating adjustment module, connected to the wall temperature leveling module, the wall temperature protection quick-opening control module, and the data integration module, is used to adjust the wall temperature parameters and generate parameter adjustment data. The data integration module is used to integrate the parameter adjustment data, the first temperature data, and the second temperature data to generate integrated data; The fourth data transmission module sends the integrated data to the server.

5. The system according to claim 4, characterized in that, The wall temperature control terminal further includes: an air volume regulation module, a fuel quantity regulation module, and an oxygen quantity regulation module; the air volume regulation module, the fuel quantity regulation module, and the oxygen quantity regulation module are all connected to the adaptive heating regulation module and are used to regulate the air volume, fuel quantity, and oxygen quantity.

6. The system according to claim 5, characterized in that, The air volume regulation module, fuel quantity regulation module, and oxygen quantity regulation module are all connected to their external supporting equipment.

7. The system according to claim 5, characterized in that, The wall temperature control terminal is specifically used for: The wall temperature status is determined by the data judgment module. Based on the wall temperature status, the wall temperature is controlled by the adaptive heating adjustment module, the wall temperature protection quick-opening control module, and the wall temperature leveling module. The wall temperature status includes: normal, over-temperature, and boiler uneven burning. If the wall temperature status is normal, the server uses a cooling command to open the valves of the first-stage and second-stage desuperheaters to a suitable degree. If the wall temperature status is over-temperature, the first-stage and second-stage desuperheaters are activated by the wall temperature protection quick-opening control module, and the air volume adjustment module, fuel quantity adjustment module, and oxygen quantity adjustment module in the adaptive heating adjustment module adjust the air volume, fuel quantity, and oxygen quantity required for the current temperature according to the curve model data. If the wall temperature status is boiler uneven burning, the wall temperature leveling logic of the wall temperature leveling module adjusts the wall temperature according to the air volume adjustment module, fuel quantity adjustment module, and oxygen quantity adjustment module of the adaptive heating adjustment module, thereby leveling the temperature on both sides of the furnace.

8. A method for controlling desuperheating water based on wall temperature prediction, characterized in that, The desuperheating water control system based on wall temperature prediction according to any one of claims 1-7 includes: S1. The superheated end and the reheated end transmit their first and second temperature data during operation to the desuperheating water control end. S2. The desuperheating water control terminal receives the first temperature data and the second temperature data to generate configuration data, and transmits the configuration data to the wall temperature prediction system terminal. S3. The wall temperature prediction system generates wall temperature prediction information based on the first temperature data and the second temperature data, and sends the wall temperature prediction information to the wall temperature control terminal. S4. The wall temperature control terminal determines the wall temperature status based on the first temperature data, the second temperature data, and the wall temperature prediction information. Based on the wall temperature status, the wall temperature is controlled by the server, the adaptive heating adjustment module, the wall temperature protection quick-opening control module, and the wall temperature leveling module.

9. The method according to claim 8, characterized in that, Step S4 specifically includes: The wall temperature status is determined by the data judgment module, and the wall temperature status includes: normal, overheating, and boiler unbalanced burning. If the wall temperature is normal, the server will use a cooling command to open the valve to a suitable degree through the first-stage and second-stage cooling devices. If the wall temperature is overheated, the first-stage and second-stage desuperheaters are activated through the wall temperature protection quick-opening control module, and the air volume regulation module, fuel quantity regulation module, and oxygen quantity regulation module in the adaptive heating regulation module adjust the air volume, fuel quantity, and oxygen quantity according to the data of the air volume, fuel quantity, and oxygen quantity required at this temperature. If the wall temperature is unevenly distributed in the boiler, the wall temperature leveling logic of the wall temperature leveling module is used to adjust the air volume, fuel quantity, and oxygen quantity of the adaptive heating adjustment module, thereby leveling the wall temperature on both sides of the furnace.

Citation Information

Patent Citations

  • Method for actively inhibiting overtemperature of boiler wall temperature

    CN115355492A