CN112762444B - Optimization method for heat accumulator temperature distribution curve at initial moment of ventilation process - Google Patents
Optimization method for heat accumulator temperature distribution curve at initial moment of ventilation process Download PDFInfo
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- CN112762444B CN112762444B CN202011623904.1A CN202011623904A CN112762444B CN 112762444 B CN112762444 B CN 112762444B CN 202011623904 A CN202011623904 A CN 202011623904A CN 112762444 B CN112762444 B CN 112762444B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The application discloses a method for optimizing a heat accumulator temperature distribution curve at the initial moment of a ventilation process, which comprises the following steps: the method comprises the steps of collecting the temperatures of first heat accumulators at multiple positions and the temperatures of first air flows at different moments in the process that high-flow high-temperature fuel gas flows from the top to the bottom of a heat accumulator of a preset heat accumulator, and generating a first heat accumulator temperature distribution curve and a first fuel gas temperature distribution curve according to the first heat accumulator temperature and the first air flow temperature respectively; respectively determining first plumpness of a first heat accumulator temperature distribution curve and a first fuel gas temperature distribution curve, and judging whether the first plumpness is greater than a first preset threshold value; if the temperature of the first heat accumulator is not greater than the preset threshold, optimizing and adjusting the temperature distribution curve of the first heat accumulator and the temperature distribution curve of the first fuel gas according to a preset first optimization strategy until the plumpness of the adjusted temperature distribution curves is greater than the first preset threshold. The application has solved among the prior art ceramic hollow brick heat accumulation heater's heat accumulator and has preheated the technical problem that the technique can not satisfy actual demand.
Description
Technical Field
The application relates to the technical field of heat accumulators, in particular to a method for optimizing a temperature distribution curve of a heat accumulator at the initial moment of a ventilation process.
Background
The main heater forms in the field of hypersonic wind tunnel include metal heat storage heater, metal continuous heater, graphite electric induction hollow brick heat storage heater, ceramic pellet heat storage heater, ceramic hollow brick heat storage heater and other forms. In the case of a long-term operation of the ceramic hollow brick heat storage heater, the ceramic hollow brick heat storage heater generally comprises an alumina ceramic hollow brick heat storage heater pattern for providing clean air of 2000K level and a zirconia ceramic hollow brick heat storage heater pattern for providing clean air of 2600K level. Preheating of a heat accumulator in the ceramic hollow brick heat accumulation heater is an important link in a pure heating technology.
At present, the heat accumulator of the ceramic hollow brick heat accumulation heater is preheated as follows: the method comprises the steps of firstly determining the temperature distribution of a heat accumulator at the initial moment of an aeration process by adjusting the temperature and the flow of gas in a distribution manner, then calculating the temperature and the flow temperature of the heat accumulator at different moments according to the temperature distribution of the heat accumulator at the initial moment of the aeration process and the structure of the heat accumulator, and preheating the heat accumulator of the ceramic hollow brick heat accumulation heater according to the temperature and the flow temperature of the heat accumulator at different moments. Therefore, the temperature distribution of the heat accumulator at the initial moment of the ventilation process determined by the distribution and adjustment of the temperature and the flow of the fuel gas in the prior art is incomplete, and the heat accumulator of the ceramic hollow brick heat accumulation heater is preheated according to a temperature distribution curve and cannot meet the actual requirement.
Disclosure of Invention
The technical problem that this application was solved is: the heat accumulator of the ceramic hollow brick heat accumulation heater in the prior art is preheated and cannot meet the actual requirement. The application provides an optimization method of a heat accumulator temperature distribution curve at the initial moment of a ventilation process, in the scheme provided by the embodiment of the application, a first heat accumulator temperature distribution curve and a first fuel gas temperature distribution curve are determined by adopting high-flow high-temperature fuel gas; when the first plumpness of the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve is not larger than a first preset threshold value, optimizing and adjusting the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve according to a preset first optimization strategy until the plumpness of the adjusted temperature distribution curve is larger than the first preset threshold value, and determining a second heat accumulator temperature distribution curve and a second fuel gas temperature distribution curve which are optimized and adjusted for the last time. In the scheme that this application embodiment provided promptly, optimize the adjustment through the first optimization strategy of predetermineeing to initial heat accumulator temperature distribution curve and air current temperature distribution curve, improve heat accumulator temperature distribution curve for ceramic hollow brick heat accumulation heater's heat accumulator preheats according to the heat accumulator temperature distribution curve after improving and can satisfy actual demand.
In a first aspect, an embodiment of the present application provides a method for optimizing a temperature distribution curve of a thermal storage body at an initial time of a ventilation process, where the method includes:
the method comprises the steps of collecting first heat accumulator temperatures of a plurality of positions of a heat accumulator and first gas flow temperatures at different moments in the process that high-flow high-temperature gas flows from the top to the bottom of the heat accumulator of a preset heat accumulator, and generating a first heat accumulator temperature distribution curve and a first gas temperature distribution curve of the heat accumulator according to the first heat accumulator temperatures and the first gas flow temperatures respectively, wherein the high-flow high-temperature gas refers to high-temperature gas with the flow per unit area higher than a preset threshold value;
respectively determining first plumpness of the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve, and judging whether the first plumpness is greater than a first preset threshold value;
and if the temperature of the first heat accumulator is not greater than the preset threshold value, optimizing and adjusting the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve according to a preset first optimization strategy until the plumpness of the adjusted temperature distribution curves is greater than the first preset threshold value, and determining a second heat accumulator temperature distribution curve and a second fuel gas temperature distribution curve which are optimized and adjusted for the last time.
In the scheme provided by the embodiment of the application, a first heat accumulator temperature distribution curve and a first fuel gas temperature distribution curve are determined by adopting high-flow high-temperature fuel gas; when the first plumpness of the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve is not larger than a first preset threshold value, optimizing and adjusting the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve according to a preset first optimization strategy until the plumpness of the adjusted temperature distribution curve is larger than the first preset threshold value, and determining a second heat accumulator temperature distribution curve and a second fuel gas temperature distribution curve which are optimized and adjusted for the last time. In the scheme that this application embodiment provided promptly, optimize the adjustment through the first optimization strategy of predetermineeing to initial heat accumulator temperature distribution curve and air current temperature distribution curve, improve heat accumulator temperature distribution curve for ceramic hollow brick heat accumulation heater's heat accumulator preheats according to the heat accumulator temperature distribution curve after improving and can satisfy actual demand.
Optionally, the preset first optimization strategy includes:
collecting second heat accumulator temperatures of a plurality of positions of a heat accumulator and second air flow temperatures at different moments in the process that low-flow high-temperature gas flows from the top to the bottom of the heat accumulator, wherein the low-flow high-temperature gas is the high-temperature gas with the flow per unit area lower than the preset threshold;
optimizing and adjusting the first heat accumulator temperature distribution curve according to the second heat accumulator temperature to obtain an adjusted heat accumulator temperature distribution curve, and optimizing and adjusting the first fuel gas temperature distribution curve according to the second fuel gas temperature to obtain an adjusted fuel gas temperature distribution curve;
determining a second saturation of the adjusted heat accumulator temperature distribution curve and the adjusted fuel gas temperature distribution curve, and determining a bottom heat accumulator temperature of the preset heat accumulator according to the adjusted heat accumulator temperature distribution curve;
judging whether the second saturation is greater than the first preset threshold and whether the temperature of the bottom heat accumulator is greater than a preset grate temperature limit;
and if the second saturation is not greater than the first preset threshold and the temperature of the bottom heat accumulator is greater than the preset grate temperature limit, respectively carrying out optimization adjustment on the adjusted temperature distribution curve of the heat accumulator and the adjusted temperature distribution curve of the fuel gas again according to a preset second optimization strategy until the saturation of the adjusted temperature distribution curve is greater than the preset threshold.
Optionally, the preset second optimization strategy includes:
keeping the temperature of the top of the preset preheater unchanged, blowing cold air from the bottom of the preset heat accumulator reversely through a high-pressure air supply path, and collecting the temperatures of third heat accumulators at multiple positions of the heat accumulator and the temperatures of third air flows at different moments;
and optimizing and adjusting the adjusted heat accumulator temperature distribution curve again according to the third heat accumulator temperature, and optimizing and adjusting the adjusted fuel gas temperature distribution curve again according to the third gas flow temperature.
Optionally, the method further comprises:
determining a first time point of the second heat accumulator temperature distribution curve and the second fuel gas temperature distribution curve after the last optimization adjustment, and a second time point of starting a wind tunnel blowing test;
determining a difference value between the second time point and the first time point, and judging whether the difference value is greater than a second preset threshold value;
and if the temperature of the fuel gas is larger than the first temperature distribution curve, readjusting the second heat accumulator temperature distribution curve and the second fuel gas temperature distribution curve.
Drawings
Fig. 1 is a schematic structural diagram of a hollow brick thermal storage heater system according to an embodiment of the present application;
FIG. 2 is a schematic flow chart illustrating a method for optimizing a thermal mass temperature profile at an initial time of an aeration process according to an embodiment of the present disclosure;
FIG. 3 is a schematic representation of a first thermal mass temperature profile provided in accordance with an embodiment of the present application;
FIG. 4 is a schematic diagram of a first combustion gas temperature profile provided by an embodiment of the present application;
FIG. 5 is a schematic view of an adjusted thermal mass temperature profile provided in accordance with an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an adjusted gas temperature distribution curve according to an embodiment of the present application.
Detailed Description
In the solutions provided in the embodiments of the present application, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to better understand the technical solutions, the technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
For easy understanding, refer to fig. 1, which is a schematic structural diagram of a hollow brick thermal storage heater system provided in the embodiments of the present application. In fig. 1, a hollow block regenerative heater includes: the device comprises a hollow brick heat accumulator 1, a plurality of heat insulation layers 2, a heating shell 3, a porous grate 4, a heater test gas inlet 5, a heater test gas outlet 6, a gas combustion heater 7, a methane or natural gas flow control valve 8, an air or oxygen-enriched air flow control valve 9, a test gas flow high-temperature and high-pressure stop valve 10, a temperature distribution improvement high-temperature and high-pressure stop valve 11, a waste heat gas discharge path stop valve 12 and a high-pressure test air supply furnace regulating valve 13.
Specifically, in the scheme provided in the embodiment of the present application, the working principle of the air brick heat storage heater system is as follows: methane or natural gas is controlled to be input into the gas combustion heater 7 through a methane or natural gas flow control valve 8, then the gas combustion heater 7 obtains high-flow high-temperature gas through combustion, and then the high-flow high-temperature gas flows from the top to the bottom of the heat accumulator; less methane or natural gas is controlled to be input into the gas combustion heater 7 through the methane or natural gas flow control valve 8, then the gas combustion heater 7 obtains low-flow high-temperature gas through combustion, and the low-flow high-temperature gas flows from the top to the bottom of the heat accumulator.
The method for optimizing the temperature distribution curve of the heat accumulator at the initial time of the aeration process provided by the embodiments of the present application is further described in detail with reference to the drawings in the specification, and a specific implementation manner of the method may include the following steps (a method flow is shown in fig. 2):
step 201, collecting first heat accumulator temperatures of a plurality of positions of a heat accumulator and first gas flow temperatures at different moments in a process that high-flow high-temperature gas flows from the top to the bottom of the heat accumulator of a preset heat accumulator, and generating a first heat accumulator temperature distribution curve and a first gas temperature distribution curve of the heat accumulator according to the first heat accumulator temperatures and the first gas flow temperatures respectively, wherein the high-flow high-temperature gas is high-temperature gas with a flow rate higher than a preset threshold per unit area.
Specifically, in the scheme provided in the embodiment of the present application, the preset threshold may be 2.0kg/s/m 2 That is, the high-flow high-temperature gas can mean that the flow per unit area is higher than 2.0kg/s/m 2 The high-temperature fuel gas of (2) may have other values, and is not limited herein. The method comprises the steps of generating high-temperature gas with large flow by adopting a gas combustion heater, then flowing a preheating heat accumulator in the heat accumulator from the top to the bottom, collecting first heat accumulator temperatures at a plurality of preset positions in the heat accumulator and first gas flow temperatures at different moments, and generating a first heat accumulator temperature distribution curve and a first gas temperature distribution curve of the heat accumulator according to the first heat accumulator temperatures and the first gas flow temperatures respectively. Referring to fig. 3 and 4, fig. 3 is a schematic diagram of a temperature profile of a first heat storage body provided in an embodiment of the present application, and fig. 4 is a schematic diagram of a temperature profile of a first combustion gas provided in an embodiment of the present application. Referring to the temperature curves shown in fig. 3 and 4, it can be seen that when the temperature of the bottom waste heat fuel gas reaches 550K by using the large-flow fuel gas preheating mode, the temperature of the heat accumulator at the bottom of the heat accumulator reaches 500K.
Step 202, respectively determining a first fullness of the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve, and judging whether the first fullness is greater than a first preset threshold.
And 203, if the temperature of the second regenerator is not greater than the temperature of the first fuel gas, optimizing and adjusting the first regenerator temperature distribution curve and the first fuel gas temperature distribution curve according to a preset first optimization strategy until the plumpness of the adjusted temperature distribution curves is greater than the first preset threshold value, and determining a second regenerator temperature distribution curve and a second fuel gas temperature distribution curve which are optimized and adjusted for the last time.
In the scheme that this application embodiment provided, when adopting large-traffic gas preheating mode to preheat the heat accumulator, if the plumpness of the first heat accumulator temperature distribution curve that the heat accumulator after preheating corresponds and first gas temperature distribution curve does not satisfy first preset threshold value, need carry out optimization adjustment to first heat accumulator temperature distribution curve and first gas temperature distribution curve. Specifically, there are various methods for optimally adjusting the temperature distribution curve of the first heat storage body and the temperature distribution curve of the first combustion gas, and one of them is described as an example below.
In a possible implementation manner, the preset first optimization strategy includes:
collecting second heat accumulator temperatures of a plurality of positions of a heat accumulator and second air flow temperatures at different moments in the process that low-flow high-temperature gas flows from the top to the bottom of the heat accumulator, wherein the low-flow high-temperature gas is the high-temperature gas with the flow per unit area lower than the preset threshold;
optimizing and adjusting the first heat accumulator temperature distribution curve according to the second heat accumulator temperature to obtain an adjusted heat accumulator temperature distribution curve, and optimizing and adjusting the first fuel gas temperature distribution curve according to the second fuel gas temperature to obtain an adjusted fuel gas temperature distribution curve;
determining a second saturation of the adjusted heat accumulator temperature distribution curve and the adjusted fuel gas temperature distribution curve, and determining a bottom heat accumulator temperature of the preset heat accumulator according to the adjusted heat accumulator temperature distribution curve;
judging whether the second saturation is greater than the first preset threshold and whether the temperature of the bottom heat accumulator is greater than a preset grate temperature limit;
and if the second saturation is not greater than the first preset threshold and the temperature of the bottom heat accumulator is greater than the preset grate temperature limit, respectively carrying out optimization adjustment on the adjusted temperature distribution curve of the heat accumulator and the adjusted temperature distribution curve of the fuel gas again according to a preset second optimization strategy until the saturation of the adjusted temperature distribution curve is greater than the preset threshold.
Specifically, in the solution provided in the embodiment of the present application, if the preset threshold is 2.0kg/s/m 2 That is, the low-flow high-temperature gas means that the flow per unit area is less than 2.0kg/s/m 2 The high-temperature combustion gas of (2). The heat accumulator is preheated from the top to the bottom by using the low-flow high-temperature fuel gas, and the plumpness of the temperature distribution curve of the heat accumulator is further increased on the basis of the step 201, even if the temperature near the bottom is higher. Referring to fig. 5 and 6, fig. 5 is a schematic diagram of an adjusted thermal mass temperature profile provided by an embodiment of the present application; fig. 6 is a schematic diagram of an adjusted gas temperature distribution curve according to an embodiment of the present application. In fig. 5 and 6, the low-flow high-temperature fuel gas is used for preheating, the temperature of the bottom waste heat fuel gas reaches 900K, and the temperature of the heat accumulator at the bottom of the heat accumulator reaches 550K magnitude. Therefore, when the low-flow preheating is adopted, the temperature at the fire grate reaches the limit condition, the temperature of the low-flow fuel gas can reach 900K, and the possibility of enabling the temperature distribution curve of the heat accumulator to be fuller is realized.
Further, in order to improve the fullness of the heat storage temperature distribution curve and the fuel gas temperature distribution curve, in a possible implementation manner, the preset second optimization strategy includes:
keeping the temperature of the top of the preset preheater unchanged, blowing cold air from the bottom of the preset heat accumulator reversely through a high-pressure air supply path, and collecting the temperatures of third heat accumulators at multiple positions of the heat accumulator and the temperatures of third air flows at different moments;
and optimizing and adjusting the adjusted heat accumulator temperature distribution curve again according to the third heat accumulator temperature, and optimizing and adjusting the adjusted fuel gas temperature distribution curve again according to the third gas flow temperature.
Specifically, in the solution provided in this embodiment of the present application, after the low-flow preheating is performed in step 202, the temperature distribution curve of the heat accumulator is still not full, and the temperature of the bottom heat accumulator reaches the use limit of the grate temperature. The heat accumulator is blown reversely by low-flow cold air to reduce the temperature of the heat accumulator at the side of the grate, while the temperature of the heat accumulator at the top side is kept unchanged basically, so that the temperature distribution curve and the airflow distribution curve of the heat accumulator are further optimized in the following.
Further, the heat accumulator temperature distribution curve and the airflow distribution curve are repeatedly optimized through a preset first optimization strategy and a preset second optimization strategy until the plumpness of the heat accumulator temperature distribution curve and the airflow distribution curve meets a first preset threshold.
Further, in a possible implementation manner, the method further includes: determining a first time point of the temperature distribution curve of the second heat accumulator and the temperature distribution curve of the second fuel after the last optimization and adjustment and a second time point of starting a wind tunnel blowing test; determining a difference value between the second time point and the first time point, and judging whether the difference value is greater than a second preset threshold value; and if the temperature of the fuel gas is larger than the first temperature distribution curve, readjusting the second heat accumulator temperature distribution curve and the second fuel gas temperature distribution curve.
Specifically, in the scheme provided in the embodiment of the present application, after the temperature distribution curve of the heat accumulator and the temperature distribution curve of the fuel gas are optimally adjusted, in the long-term standing process, the temperature distribution curve of the heat accumulator is further smoothed, so that the temperature at the bottom of the heat accumulator is increased. Therefore, after the usable heat storage body temperature distribution curve is preheated, the blowing test must be carried out immediately, and the heat storage body temperature distribution curve cannot be kept still for a long time.
In the scheme provided by the embodiment of the application, a first heat accumulator temperature distribution curve and a first fuel gas temperature distribution curve are determined by adopting high-flow high-temperature fuel gas; when the first plumpness of the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve is not larger than a first preset threshold value, optimizing and adjusting the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve according to a preset first optimization strategy until the plumpness of the adjusted temperature distribution curve is larger than the first preset threshold value, and determining a second heat accumulator temperature distribution curve and a second fuel gas temperature distribution curve which are optimized and adjusted for the last time. In the scheme that this application embodiment provided promptly, optimize the adjustment through the first optimization strategy of predetermineeing to initial heat accumulator temperature distribution curve and air current temperature distribution curve, improve heat accumulator temperature distribution curve for ceramic hollow brick heat accumulation heater's heat accumulator preheats according to the heat accumulator temperature distribution curve after improving and can satisfy actual demand.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (2)
1. A method for optimizing a temperature distribution curve of a heat accumulator at the initial moment of a ventilation process is characterized by comprising the following steps:
the method comprises the steps of collecting first heat accumulator temperatures of a plurality of positions of a heat accumulator and first gas flow temperatures at different moments in the process that high-flow high-temperature gas flows from the top to the bottom of the heat accumulator of a preset heat accumulator, and generating a first heat accumulator temperature distribution curve and a first gas temperature distribution curve of the heat accumulator according to the first heat accumulator temperatures and the first gas flow temperatures respectively, wherein the high-flow high-temperature gas refers to high-temperature gas with the flow per unit area higher than a preset threshold value;
respectively determining first plumpness of the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve, and judging whether the first plumpness is greater than a first preset threshold value;
if the temperature of the first heat accumulator is not greater than the preset threshold value, optimizing and adjusting the first heat accumulator temperature distribution curve and the first fuel gas temperature distribution curve according to a preset first optimization strategy until the plumpness of the adjusted temperature distribution curves is greater than the first preset threshold value, and determining a second heat accumulator temperature distribution curve and a second fuel gas temperature distribution curve which are optimized and adjusted for the last time;
the preset first optimization strategy comprises the following steps:
collecting second heat accumulator temperatures of a plurality of positions of a heat accumulator and second air flow temperatures at different moments in the process that low-flow high-temperature gas flows from the top to the bottom of the heat accumulator, wherein the low-flow high-temperature gas is the high-temperature gas with the flow per unit area lower than the preset threshold;
optimizing and adjusting the first heat accumulator temperature distribution curve according to the second heat accumulator temperature to obtain an adjusted heat accumulator temperature distribution curve, and optimizing and adjusting the first fuel gas temperature distribution curve according to the second fuel gas temperature to obtain an adjusted fuel gas temperature distribution curve;
determining a second saturation of the adjusted heat accumulator temperature distribution curve and the adjusted fuel gas temperature distribution curve, and determining the bottom heat accumulator temperature of the preset heat accumulator according to the adjusted heat accumulator temperature distribution curve;
judging whether the second fullness is greater than the first preset threshold value and whether the temperature of the bottom heat accumulator is greater than a preset grate temperature limit;
if the second fullness is not greater than the first preset threshold and the temperature of the bottom heat accumulator is greater than the preset grate temperature limit, respectively carrying out optimization adjustment on the adjusted temperature distribution curve of the heat accumulator and the adjusted temperature distribution curve of the fuel gas again according to a preset second optimization strategy until the fullness of the adjusted temperature distribution curve is greater than the preset threshold;
the preset second optimization strategy comprises the following steps:
keeping the temperature of the top of the preset preheater unchanged, blowing cold air from the bottom of the preset heat accumulator reversely through a high-pressure air supply path, and collecting the temperatures of third heat accumulators at multiple positions of the heat accumulator and the temperatures of third air flows at different moments;
and optimizing and adjusting the adjusted heat accumulator temperature distribution curve again according to the third heat accumulator temperature, and optimizing and adjusting the adjusted fuel gas temperature distribution curve again according to the third gas flow temperature.
2. The method of claim 1, further comprising:
determining a first time point of the temperature distribution curve of the second heat accumulator and the temperature distribution curve of the second fuel after the last optimization and adjustment and a second time point of starting a wind tunnel blowing test;
determining a difference value between the second time point and the first time point, and judging whether the difference value is greater than a second preset threshold value;
and if the temperature of the fuel gas is larger than the first temperature distribution curve, readjusting the second heat accumulator temperature distribution curve and the second fuel gas temperature distribution curve.
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