CN-121977196-A - Boiler coupling type energy saving method, system, medium and product

CN121977196ACN 121977196 ACN121977196 ACN 121977196ACN-121977196-A

Abstract

The application discloses a boiler coupling type energy saving method, a system, a medium and a product. According to the method, a long Cheng Guangzi absorption sensor is arranged in a hearth to acquire temperature field and carbon dioxide concentration field distribution data of a plurality of monitoring sections. And identifying the high-efficiency combustion zone based on the ratio of the temperature to the carbon dioxide concentration, and calculating the space occupation ratio and the distribution uniformity of the high-efficiency combustion zone so as to obtain the energy efficiency-emission coupling degree parameter. And adjusting the water supply flow according to the difference value of the parameter and a preset threshold value. And simultaneously collecting the regulated steam output power and the renewable energy input power, and determining the power deviation amount based on the target load. And finally, according to the power deviation and the coupling degree parameter, the operation parameters of the fuel supply device and the water supply pump are adjusted according to the preset linkage proportion, so that the optimal control of the operation of the boiler is realized. By implementing the technical scheme provided by the application, the energy-saving efficiency of the steam boiler can be improved.

Inventors

GUO WEI
HUANG WEI
ZHANG JUNLONG
ZHOU YING
CHEN PING
Hu Gechun
FENG ZHENXIN
ZHU LIANG
ZHOU RUI
LIU WEI

Assignees

湖北特种设备检验检测研究院

Dates

Publication Date: 20260505
Application Date: 20260327

Claims (10)

1. A method for boiler coupled energy conservation, the method comprising: acquiring temperature field distribution data and carbon dioxide concentration field distribution data of a plurality of monitoring sections in a hearth of a boiler, wherein the monitoring sections are arranged at intervals along the height direction of the hearth; Identifying a region with a ratio of temperature to carbon dioxide concentration within a preset combustion efficiency interval on each monitoring section as an efficient combustion region based on temperature field distribution data and carbon dioxide concentration field distribution data of each monitoring section, and calculating a space ratio of a region volume of the efficient combustion region in the total volume of the boiler furnace and distribution uniformity among the monitoring sections; Calculating an energy efficiency-emission coupling parameter according to the space duty ratio and the distribution uniformity; Calculating a water supply flow regulating quantity according to the difference value between the energy efficiency-emission coupling degree parameter and a preset coupling degree threshold value, and regulating the water supply flow of the boiler according to the water supply flow regulating quantity; Acquiring steam output power of the boiler and renewable energy input power coupled to the boiler after water supply flow is regulated, and determining a power deviation amount based on the steam output power, the power of the renewable energy input power and a target load; And synchronously adjusting the operation parameters of the fuel supply device and the water supply pump according to the power deviation amount and the coupling degree parameter and the preset linkage proportion.
2. The method according to claim 1, wherein the identifying, as the high-efficiency combustion zone, a region in which a ratio of temperature to carbon dioxide concentration is within a preset combustion efficiency interval on each of the monitoring sections based on the temperature field distribution data and the carbon dioxide concentration field distribution data of each of the monitoring sections, comprises: Performing spatial gridding processing on the temperature field distribution data and the carbon dioxide concentration field distribution data of each monitoring section to generate grid points corresponding to the spatial positions of each monitoring section, wherein each grid point comprises a temperature grid point and a carbon dioxide concentration grid point, each temperature grid point corresponds to a temperature value, and each carbon dioxide concentration grid point corresponds to a carbon dioxide concentration value; for each grid point on each monitoring section, carrying out normalization processing on the temperature value and the carbon dioxide concentration value of the grid point, and calculating a first ratio of the normalized temperature value to the normalized carbon dioxide concentration value; Acquiring the current combustion fuel type of the boiler, determining a corresponding combustion temperature reference value and a carbon dioxide concentration reference value in complete combustion according to the fuel type, carrying out normalization processing on the combustion temperature reference value and the carbon dioxide concentration reference value, and calculating a second ratio of the normalized combustion temperature reference value to the carbon dioxide concentration reference value; determining an allowable deviation range according to a preset deviation amplitude by taking the second ratio as a reference to obtain the preset combustion efficiency interval; and identifying the space area occupied by the grid points with the first ratio falling into the preset combustion efficiency interval on each monitoring section as the high-efficiency combustion area.
3. The method of claim 1, wherein said calculating the spatial duty cycle of the area volume of the high efficiency combustion zone in the total volume of the boiler furnace and the distribution uniformity between the monitoring sections comprises: acquiring the number of grid points belonging to the efficient combustion zone on each monitoring section, and calculating the sectional area of the efficient combustion zone on each monitoring section based on the number of grid points and the space size; Acquiring the height interval between adjacent monitoring sections, accumulating the sectional areas of the high-efficiency combustion areas on each monitoring section along the height direction of the hearth by adopting a trapezoid integration method, calculating the area volume of the high-efficiency combustion area, and calculating the ratio of the area volume of the high-efficiency combustion area to the total volume of the boiler hearth to obtain the space occupation ratio; and respectively calculating the section ratio of the sectional area of the high-efficiency combustion zone on each monitoring section to the total area of the monitoring section, calculating a standard deviation based on the section ratio of each monitoring section, taking the product of a preset normalization coefficient and the standard deviation as a distribution dispersion, and subtracting the distribution dispersion from a preset reference value to obtain the distribution uniformity.
4. The method of claim 3, further comprising, after said obtaining said distribution uniformity: Judging whether space faults exist in the efficient combustion area on each monitoring section; If the high-efficiency combustion area has a space fault, identifying the position of a monitoring section where the space fault is located, and recording the number of the space faults; Calculating the position distance between the monitoring section positions of the space faults in the height direction of the hearth, and calculating the space fault distribution variance based on the position distance Carrying out weighted calculation on the number of the space faults and the space fault distribution variance to determine fault correction coefficients; And carrying out compensation operation on the distribution uniformity and the fault correction coefficient to obtain corrected distribution uniformity.
5. The method of claim 1, wherein said calculating an energy efficiency-emission coupling parameter from said space duty cycle and said distribution uniformity comprises: acquiring the current fuel consumption rate and the current steam output rate of the boiler, and calculating the actual thermal efficiency of the boiler; Acquiring the current smoke emission flow of the boiler and the average concentration of carbon dioxide in smoke, and calculating the total emission of carbon dioxide in unit time; judging whether the space duty ratio is lower than a preset duty ratio threshold or whether the distribution uniformity is lower than a preset uniformity threshold; When the space duty ratio is lower than a preset duty ratio threshold, determining that the boiler has underutilization of combustion space, and carrying out reduction correction on the actual thermal efficiency based on a difference value between the space duty ratio and the preset duty ratio threshold; when the distribution uniformity is lower than a preset uniformity threshold, determining that the boiler has uneven combustion distribution, and performing incremental correction on the total carbon dioxide emission based on a difference value between the distribution uniformity and the preset uniformity threshold; And carrying out ratio operation on the corrected thermal efficiency and the corrected total carbon dioxide emission to obtain the energy efficiency-emission coupling degree parameter.
6. The method of claim 1, wherein the determining a power offset based on the power of the steam output power, the renewable energy input power, and a target load comprises: acquiring a target power requirement corresponding to the target load; Collecting historical input power data of the renewable energy source in a preset time window, and calculating fluctuation variance of the historical input power data; Filtering the renewable energy input power based on the fluctuation variance to filter out high-frequency fluctuation components and obtain renewable energy smooth power; Converting the steam output power into equivalent thermal power, and calculating a deviation value between the equivalent thermal power and the reference power to obtain the power deviation value; And converting the steam output power into equivalent thermal power, and calculating a deviation value between the equivalent thermal power and the reference power to obtain the power deviation value.
7. The method of claim 1, wherein said synchronously adjusting the operating parameters of the fuel supply and the feed water pump according to the preset linkage ratio based on the power deviation amount and the coupling degree parameter comprises: Acquiring the evaporation ratio of the boiler, and calculating the reference water supply demand under unit fuel consumption based on the evaporation ratio; Acquiring the evaporation ratio of the boiler, and calculating the reference water supply demand under unit fuel consumption based on the evaporation ratio; Calculating an effective heat output corresponding to a unit fuel supply amount based on a heating value of the fuel and a heat efficiency of the boiler, and determining a first adjustment increment of a fuel supply rate according to a ratio of the power deviation amount to the effective heat output; Establishing a water supply flow characteristic curve according to the reference water supply demand and the historical water supply working condition parameters of the boiler in a preset period, determining a working condition point corresponding to a first adjustment increment of the fuel supply rate on the characteristic curve in combination with the preset linkage proportion, and determining the deviation of the water supply flow corresponding to the working condition point and the current water supply flow of the boiler as a second adjustment increment of the water supply flow; based on the deviation rate of the coupling degree parameter and a preset coupling degree interval, adjusting a first adjustment increment of the fuel supply rate and a second adjustment increment of the water supply flow; the adjusted first adjusting increment and the second adjusting increment are respectively converted into opening changing amounts of corresponding actuators, and the opening changing amounts are respectively and gradually applied to the fuel supply device and the water supply pump according to preset step sizes.
8. A boiler coupled energy saving system comprising one or more processors and a memory coupled to the one or more processors, the memory for storing computer program code comprising computer instructions that the one or more processors invoke to cause the boiler coupled energy saving system to perform the method of any of claims 1-7.
9. A computer readable storage medium comprising instructions which, when run on a boiler coupled energy saving system, cause the boiler coupled energy saving system to perform the method of any of claims 1-7.
10. A computer program product, characterized in that the computer program product, when run on a boiler coupled energy saving system, causes the boiler coupled energy saving system to perform the method according to any of claims 1-7.

Description

Boiler coupling type energy saving method, system, medium and product Technical Field The invention belongs to the technical field of steam boiler control, and particularly relates to a boiler coupling type energy-saving method, a system, a medium and a product. Background With the continuous expansion of industrial production scale and the increasingly strict requirements on energy conservation and emission reduction, the steam boiler is used as important heat energy equipment, and the operation efficiency and the environmental protection performance of the steam boiler are more and more concerned. In order to improve the energy utilization efficiency, some steam boilers have been attempted to introduce renewable energy sources as supplemental heat sources. At present, the operation control of the steam boiler mainly depends on detection data of a few fixed measuring points in a hearth, and a fuel supply device and a water supply pump are respectively adjusted according to a fixed strategy by analyzing the detection data so as to maintain the stable operation of the boiler. However, because the control is performed by adopting the local data of the fixed measuring points, the existing method is difficult to comprehensively reflect the dynamic change of the combustion condition in the hearth. Particularly, after renewable energy sources are introduced, the combustion fluctuation of the boiler is larger, the combustion change of the boiler is difficult to adapt to only by means of a simple fixed parameter control strategy, control response is delayed, and the whole energy efficiency and pollutant emission level are difficult to adjust in time, so that the energy saving efficiency of the steam boiler is reduced. Disclosure of Invention In response to the above-identified deficiencies or improvements in the art, the present application provides a coupled energy saving method, system, medium and product for a boiler. According to the method, a long Cheng Guangzi absorption sensor is arranged in a hearth to acquire temperature field and carbon dioxide concentration field distribution data of a plurality of monitoring sections. And identifying the high-efficiency combustion zone based on the ratio of the temperature to the carbon dioxide concentration, and calculating the space occupation ratio and the distribution uniformity of the high-efficiency combustion zone so as to obtain the energy efficiency-emission coupling degree parameter. And adjusting the water supply flow according to the difference value of the parameter and a preset threshold value. And simultaneously collecting the regulated steam output power and the renewable energy input power, and determining the power deviation amount based on the target load. And finally, according to the power deviation and the coupling degree parameter, the operation parameters of the fuel supply device and the water supply pump are adjusted according to the preset linkage proportion, so that the optimal control of the operation of the boiler is realized. By implementing the technical scheme provided by the application, the energy-saving efficiency of the steam boiler can be improved. To achieve the above object, according to one aspect of the present invention, there is provided a coupled energy saving method for a boiler, comprising: acquiring temperature field distribution data and carbon dioxide concentration field distribution data of a plurality of monitoring sections in a hearth of a boiler, wherein the monitoring sections are arranged at intervals along the height direction of the hearth; Identifying a region with a ratio of temperature to carbon dioxide concentration within a preset combustion efficiency interval on each monitoring section as an efficient combustion region based on temperature field distribution data and carbon dioxide concentration field distribution data of each monitoring section, and calculating a space ratio of a region volume of the efficient combustion region in the total volume of the boiler furnace and distribution uniformity among the monitoring sections; Calculating an energy efficiency-emission coupling parameter according to the space duty ratio and the distribution uniformity; Calculating a water supply flow regulating quantity according to the difference value between the energy efficiency-emission coupling degree parameter and a preset coupling degree threshold value, and regulating the water supply flow of the boiler according to the water supply flow regulating quantity; Acquiring steam output power of the boiler and renewable energy input power coupled to the boiler after water supply flow is regulated, and determining a power deviation amount based on the steam output power, the power of the renewable energy input power and a target load; And synchronously adjusting the operation parameters of the fuel supply device and the water supply pump according to the power deviation amount and the coupling degree parameter and the p