CN115774892A - Design method and system for converter vaporization cooling flue - Google Patents
Design method and system for converter vaporization cooling flue Download PDFInfo
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- CN115774892A CN115774892A CN202211294869.2A CN202211294869A CN115774892A CN 115774892 A CN115774892 A CN 115774892A CN 202211294869 A CN202211294869 A CN 202211294869A CN 115774892 A CN115774892 A CN 115774892A
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Abstract
The invention belongs to the technical field of flue evaporative cooling, and particularly provides a converter evaporative cooling flue design method and a converter evaporative cooling flue design system, wherein the method specifically comprises the following steps: the flue is modeled in sections, the built flue model comprises a main pipeline and a plurality of branch pipelines which are communicated with the main pipeline in parallel, and resistance elements are arranged at the inlet and/or the outlet of each branch pipeline respectively; and (3) equivalent resistance elements into small-hole throttling elements, carrying out analog simulation on the flue model, and adjusting parameters of the small-hole throttling elements so as to enable the temperature difference between outlets of the branch flow pipes to be within a preset range, thereby obtaining the best-matched resistance elements of the branch flow pipes. The scheme accurately matches the corresponding resistance element according to the heat exchange effect of each pipeline, effectively ensures the uniform and efficient heat dissipation of all the pipelines, can perfectly match the internal heat exchange condition, and maximally converts and utilizes the heat energy in a large amount of high-temperature furnace gas released in the production process of steel products.
Description
Technical Field
The invention relates to the technical field of flue evaporative cooling, in particular to a converter evaporative cooling flue design method and a converter evaporative cooling flue design system.
Background
With the continuous development of the steel industry, steel enterprises are focusing on eliminating the backward capacity, improving the product quality and innovating the technology, the steel industry continuously improves the standards of steel, environmental protection and energy consumption, and the energy conservation and emission reduction become one of the important focuses of the steel development gradually. Under the background, the development of the flue gas waste heat utilization technology can greatly convert and utilize heat energy in a large amount of high-temperature furnace gas released in the production process of steel products. The evaporative cooling system is one of the technologies for utilizing waste heat, and has been applied in the field of steel for many years, but with the continuous improvement of energy efficiency and service life requirements, the problems existing in the original evaporative cooling system are increasingly prominent, and become one of the barriers for limiting the development of the evaporative cooling system. The lack of circulating water causes the work failure of the vaporization cooling system, and the main reason for the lack of circulating water is 2 points:
1. the work of the vaporization cooling system is periodic, and the temperature distribution at different positions in the work process is not uniform;
2. due to the influence of factors such as gravity, structure and the like, the flow distribution condition of water flow in the flue of the evaporative cooling system cannot be perfectly matched with the internal heat exchange condition.
Disclosure of Invention
The invention aims at the technical problem that the flow distribution condition of water flow in the flue of the vaporization cooling system in the prior art cannot be uniformly matched with the internal heat exchange condition.
The invention provides a design method of a converter vaporization cooling flue, which comprises the following steps:
s1, modeling a flue in sections, wherein a built flue model comprises a main pipeline and a plurality of branch flow pipelines which are communicated with the main pipeline in parallel, and resistance elements are arranged at the inlet and/or the outlet of each branch flow pipeline respectively;
and S2, equivalent the resistance element into a small hole throttling element, performing analog simulation on the flue model, and adjusting the parameters of each small hole throttling element to enable the temperature difference between outlets of the branch flow pipes to be within a preset range, so as to obtain the resistance element optimally matched with each branch flow pipe.
Preferably, the resistance element is one or more of a small hole with a small inlet and a large outlet, a porous throttling orifice plate and a valve.
Preferably, the S2 specifically includes:
acquiring flow velocity and flow information of each branch pipe, and calculating a resistance value of a resistance element;
dividing the resistance element into a plurality of regions according to the resistance value of the resistance element, wherein each region comprises one or more resistance elements with the nearest resistance value;
when parameters of the small-hole throttling element in the branch flow pipeline are adjusted, the area is determined, and then the resistance element with the best effect is selected as the resistance element of the branch flow pipeline in the area in a contrast mode.
Preferably, the S2 specifically includes: and taking the whole flue model as a one-dimensional model, and calculating the pressure drop of each branch flow pipeline under the one-dimensional model to obtain the resistance value of each resistance element.
Preferably, the S1 specifically includes: three-dimensional modeling was performed using fluent software.
Preferably, the S2 specifically includes: and calculating by combining boundary heat exchange conditions, and then adjusting the size of the small hole in the simulation process to ensure that the temperature difference between the positions of the branch flow pipelines is not large.
Preferably, the boundary heat exchange conditions include an internal stable heat source and the addition of a gravitational influence.
The invention also provides a system for designing the converter vaporization cooling flue, which is used for realizing the method for designing the converter vaporization cooling flue and comprises the following steps:
the modeling module is used for carrying out segmented modeling on the flue, the constructed flue model comprises a main pipeline and a plurality of branch flow pipelines which are communicated with the main pipeline in parallel, and a resistance element is arranged at the inlet of each branch flow pipeline;
and the simulation matching module is used for enabling the resistance element to be equivalent to the small-hole throttling element, performing simulation on the flue model, and adjusting the parameters of the small-hole throttling element so as to enable the temperature difference between the outlets of the branch flow pipes to be within a preset range, thereby obtaining the resistance element which is optimally matched with each branch flow pipe.
The invention also provides electronic equipment which comprises a memory and a processor, wherein the processor is used for realizing the steps of the design method of the converter vaporization cooling flue when executing the computer management program stored in the memory.
The invention also provides a computer readable storage medium on which a computer management-like program is stored, which, when executed by a processor, implements the steps of the converter evaporative cooling flue design method.
Has the advantages that: the invention provides a design method and a system for a converter vaporization cooling flue, wherein the method specifically comprises the following steps: the flue is modeled in sections, the constructed flue model comprises a main pipeline and a plurality of branch pipelines which are communicated with the main pipeline in parallel, and resistance elements are arranged at the inlet and/or the outlet of each branch pipeline respectively; and (3) equivalent resistance elements into small-hole throttling elements, carrying out analog simulation on the flue model, and adjusting parameters of the small-hole throttling elements so as to enable the temperature difference between outlets of the branch flow pipes to be within a preset range, thereby obtaining the best-matched resistance elements of the branch flow pipes. The scheme accurately matches the corresponding resistance element according to the heat exchange effect of each pipeline, effectively ensures the uniform and efficient heat dissipation of all the pipelines, can perfectly match the internal heat exchange condition, and maximally converts and utilizes the heat energy in a large amount of high-temperature furnace gas released in the production process of steel products.
Drawings
FIG. 1 is a flow chart of a method for designing a converter vaporization cooling flue according to the present invention;
fig. 2 is a schematic diagram of a hardware structure of a possible electronic device provided in the present invention;
FIG. 3 is a schematic diagram of a hardware structure of a possible computer-readable storage medium provided by the present invention;
FIG. 4 is a schematic view of orifice throttling provided by the present invention.
Description of reference numerals: main pipe 1, resistance element 2.
Detailed Description
The following detailed description of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
FIG. 1 is a design method of a converter vaporization cooling flue provided by the invention, which comprises the following steps:
s1, modeling a flue in sections, wherein the constructed flue model comprises a main pipeline 1 and a plurality of branch pipelines 2 which are communicated with the main pipeline 1 in parallel, and resistance elements are arranged at the inlet and/or the outlet of each branch pipeline 2 respectively; through modeling the flue in the evaporative cooling system in the steel industry, the flue for heat exchange comprises a main pipeline 1 and a plurality of branch shunting pipelines 2, and the branch shunting pipelines 2 are mutually parallel and are communicated with the main pipeline 1. The flue gas enters from the main pipeline 1 and then flows out from each branch pipeline 2. The branch ducts 21-n are shown in fig. 1.
And S2, enabling the resistance element to be equivalent to a small-hole throttling element, carrying out analog simulation on the flue model, and adjusting parameters of the small-hole throttling element to enable the temperature difference between outlets of the branch flow pipes 2 to be within a preset range so as to obtain the resistance element optimally matched with the branch flow pipes 2. And performing analog simulation calculation on the initial model to obtain the flow velocity and flow information of each shunt branch pipe, wherein the flow velocity and flow information can be three-dimensional simulation or one-dimensional.
a. One-dimensional simulation
Considering the entire flue system as a one-dimensional system, the element resistances therein can be calculated according to a conventional one-dimensional calculation, where the duct pressure drop is calculated as:
drag coefficient of ordinary pipe:
and lambda value: 0.03-0.031, and can be selected according to actual conditions. The resistance elements may all be equivalent to orifices, the orifice throttling schematic shown in fig. 4.
b. Three-dimensional simulation
Three-dimensional software such as fluent and the like is used for modeling, boundary heat exchange conditions (considered as internal stable heat sources and added gravity influence) are combined for calculation, and then in the simulation process, the size of the small hole is adjusted, so that the temperature difference of the outlet of each branch flow pipeline 2 meets the requirement.
Preferably, the resistance element is one or more of a small hole with a small inlet and a large outlet, a porous throttling orifice plate and a valve. The resistance element is arranged by adding small holes or correcting the orifice plate, namely, the orifice plate is additionally arranged at each inlet end, and because the throttling element has a plurality of types, modes such as the small holes, the orifice plate (multi-hole type), different pipe diameters, valves, detachable orifice plates and the like can be generated at the present stage.
In a preferred embodiment, the S2 specifically includes:
acquiring flow velocity and flow information of each branch pipe, and calculating a resistance value of a resistance element;
dividing the resistance element into a plurality of regions according to the resistance value of the resistance element, wherein each region comprises one or more resistance elements with the nearest resistance value;
when adjusting the parameters of the orifice throttling element in the branch flow pipe 2, the area is determined, and then the resistance element with the best effect is selected as the resistance element of the branch flow pipe 2 in comparison in the area.
One zone includes a plurality of resistance elements, with the resistance elements within each zone having similar values of resistance. Thus, when adjusting the parameters of the resistance element, a zone is selected, and all resistance values within a zone are set to a same value, which may be an average or other value, but which ensures that the values for each zone are different. And then selecting a specific resistance element in the area with the best effect.
The industrial design can divide the resistance element result into a plurality of areas, and the same resistance elements are arranged in a relatively close mode, so that the design difficulty of industrial application is simplified. The concept is proposed to simplify the design and calculation, because the over-refined holes only contribute greatly to scientific research, and after being divided into several areas, the resistance elements in one area can be set to be the same, and the same simulation method as mentioned above can be adopted to simplify the calculation and calculation amount, and meanwhile, the difference of the results is considered to be within 5% (the value can be adjusted), so that the resistance elements can be considered to be used.
For example, the method can be divided into 8 regions according to the calculation result and the resistance approximation degree, and numbers are given to the pipelines at the same time, so that the method can be better matched. The fine design can be carried out on each heating pipe, each heating pipe is numbered, and the resistance elements are numbered to carry out corresponding design. Therefore, the heat exchange utilization rate of the branch flow pipeline 2 is maximized, and the matching degree is higher.
Preferably, the S2 specifically includes: and calculating by combining boundary heat exchange conditions, and then adjusting the size of the small hole in the simulation process to ensure that the temperature difference between the outlets of the branch flow pipelines 2 is within a preset range. The boundary heat exchange conditions include internal stable heat sources and the influence of added gravity. Three-dimensional software such as fluent and the like is used for modeling, boundary heat exchange conditions (considered as internal stable heat sources and added gravity influence) are combined for calculation, and then in the simulation process, the size of the small hole is adjusted, so that the temperature difference between the positions of the branch flow pipelines is within a preset range.
Fig. 2 is a schematic diagram of an electronic device according to an embodiment of the invention. As shown in fig. 2, an embodiment of the present invention provides an electronic device, which includes a memory 1310, a processor 1320, and a computer program 1311 stored in the memory 1310 and executable on the processor 1320, where the processor 1320 executes the computer program 1311 to implement the following steps: s1, modeling a flue in sections, wherein a built flue model comprises a main pipeline and a plurality of branch flow pipelines which are communicated with the main pipeline in parallel, and resistance elements are arranged at inlets of the branch flow pipelines respectively;
and S2, equivalent the resistance element into a small hole throttling element, carrying out analog simulation on the flue model, and adjusting the parameters of each small hole throttling element to enable the temperature difference between the outlets of the branch flow pipes to be within a preset range so as to obtain the resistance element optimally matched with each branch flow pipe.
Please refer to fig. 3, which is a schematic diagram of an embodiment of a computer-readable storage medium according to the present invention. As shown in fig. 3, the present embodiment provides a computer-readable storage medium 1400, on which a computer program 1411 is stored, which computer program 1411, when executed by a processor, implements the steps of: s1, modeling a flue in sections, wherein the constructed flue model comprises a main pipeline and a plurality of branch flow pipelines which are communicated with the main pipeline in parallel, and a resistance element is arranged at an inlet of each branch flow pipeline;
and S2, equivalent the resistance element into a small hole throttling element, carrying out analog simulation on the flue model, and adjusting the parameters of each small hole throttling element to enable the temperature difference between the outlets of the branch flow pipes to be within a preset range so as to obtain the resistance element optimally matched with each branch flow pipe.
It should be noted that, in the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 computer, 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.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A design method of a converter vaporization cooling flue is characterized by comprising the following steps:
s1, modeling a flue in sections, wherein the constructed flue model comprises a main pipeline and a plurality of branch flow pipelines which are communicated with the main pipeline in parallel, and a resistance element is arranged at an inlet and/or an outlet of each branch flow pipeline respectively;
and S2, equivalent the resistance element into a small hole throttling element, performing analog simulation on the flue model, and adjusting the parameters of each small hole throttling element to enable the temperature difference between outlets of the branch flow pipes to be within a preset range, so as to obtain the resistance element optimally matched with each branch flow pipe.
2. The design method of the evaporative cooling flue of the converter according to claim 1, wherein the resistance element is one or more of a small hole with a small inlet and a large outlet, a porous throttling orifice plate and a valve.
3. The design method of the evaporative cooling flue of the converter according to claim 1, wherein the S2 specifically comprises:
acquiring flow velocity and flow information of each branch pipe, and calculating a resistance value of a resistance element;
dividing the resistance element into a plurality of regions according to the resistance value of the resistance element, wherein each region comprises one or more resistance elements with the closest resistance value;
when the parameters of the small hole throttling element in the branch flow pipeline are adjusted, the area is determined, and then the resistance element with the best effect is selected in the area in a contrast mode to serve as the resistance element of the branch flow pipeline.
4. The design method of the evaporative cooling flue of the converter according to claim 3, wherein the S2 specifically comprises: and taking the whole flue model as a one-dimensional model, and calculating the pressure drop of each branch flow pipeline under the one-dimensional model to obtain the resistance value of each resistance element.
5. The design method of the evaporative cooling flue of the converter according to claim 1, wherein the S1 specifically comprises: three-dimensional modeling was performed using fluent software.
6. The design method of the evaporative cooling flue of the converter according to claim 5, wherein the S2 specifically comprises: and calculating by combining boundary heat exchange conditions, and then adjusting the size of the small hole in the simulation process to enable the temperature difference between the positions of the branch flow pipelines to be within a preset range.
7. The converter evaporative cooling flue design method of claim 6, wherein the boundary heat exchange conditions include internal steady heat sources and the addition of gravitational effects.
8. A converter evaporative cooling flue design system, wherein the system is used for implementing the converter evaporative cooling flue design method according to any one of claims 1 to 7, and comprises the following steps:
the modeling module is used for modeling the flue in sections, the built flue model comprises a main pipeline and a plurality of branch pipelines which are communicated with the main pipeline in parallel, and resistance elements are arranged at the inlet and/or the outlet of each branch pipeline respectively;
and the simulation matching module is used for enabling the resistance element to be equivalent to the small-hole throttling element, performing simulation on the flue model, and adjusting the parameters of the small-hole throttling element so as to enable the temperature difference between the outlets of the branch flow pipes to be within a preset range, thereby obtaining the resistance element which is optimally matched with each branch flow pipe.
9. An electronic device, comprising a memory and a processor, wherein the processor is configured to execute a computer management program stored in the memory to implement the steps of the converter evaporative cooling flue design method according to any one of claims 1 to 7.
10. A computer-readable storage medium, having stored thereon, a computer management-like program that, when executed by a processor, performs the steps of the converter evaporative cooling flue design method as recited in any one of claims 1-7.
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| CN202211294869.2A CN115774892A (en) | 2022-10-21 | 2022-10-21 | Design method and system for converter vaporization cooling flue |
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| CN202211294869.2A CN115774892A (en) | 2022-10-21 | 2022-10-21 | Design method and system for converter vaporization cooling flue |
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