CN216206644U - Real-time monitoring system for steelmaking flue gas of electric furnace - Google Patents
Real-time monitoring system for steelmaking flue gas of electric furnace Download PDFInfo
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- CN216206644U CN216206644U CN202122792808.6U CN202122792808U CN216206644U CN 216206644 U CN216206644 U CN 216206644U CN 202122792808 U CN202122792808 U CN 202122792808U CN 216206644 U CN216206644 U CN 216206644U
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Abstract
The utility model provides a real-time monitoring system for flue gas generated in steelmaking of an electric furnace, which comprises: the system comprises a primary gas analyzer, a secondary gas analyzer, a temperature monitoring element, a flue gas flow monitoring element and a main control device; the primary gas analyzer and the secondary gas analyzer are connected in series, secondary flue gas generated after mixed air combustion of the electric furnace is collected through the flue gas sampling probe, and the collected secondary flue gas enters the secondary gas analyzer after passing through the primary gas analyzer, and is subjected to gas component analysis respectively; the temperature monitoring element is used for acquiring secondary flue gas temperature data; the smoke flow monitoring element is used for acquiring secondary smoke flow data; and generating a real-time monitoring result according to the data acquired by the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the smoke flow monitoring element. The secondary flue gas after the mixed air combustion of the electric furnace is collected, monitored and analyzed, and the smelting condition of the electric furnace is judged and analyzed in real time.
Description
Technical Field
The utility model relates to a steelmaking flue gas monitoring technology, in particular to a real-time monitoring system for steelmaking flue gas of an electric furnace.
Background
The steelmaking flue gas monitoring and analyzing system is applied to a converter steelmaking production system for the first time, and at present, converter steel enterprises at home and abroad have a lot of applications. The compositions and the temperature of the raw materials entering the converter in the converter steelmaking production are basically stable, the smelting environment in the converter is in a closed environment, the flue gas of the converter does not have secondary combustion, and the flue gas monitoring and analyzing system of the converter can basically accurately reflect the smelting condition in the converter. With the successful application of the steelmaking flue gas monitoring and analyzing system in the production of the converter, the flue gas monitoring and analyzing system is applied to the control of the electric furnace smelting process around 2000 years. At present, two main methods for collecting and analyzing smoke are available: an extraction type flue gas analysis technology and a flue laser flue gas analysis technology.
In actual production, raw material conditions in electric furnace steelmaking production are changed greatly, a large amount of ambient air is mixed into an electric furnace in smelting reaction, and the ambient air needs to be mixed for secondary combustion to eliminate primary flue gas CO of the electric furnace, so that the flue gas monitoring and analyzing system applied to electric furnace production is in a worse environment, the fluctuation and randomness of monitoring result data are high, and the actual situation of the flue gas of the electric furnace cannot be truly reflected. Because the furnace cover of the electric furnace needs to be lifted and rotated in production, and the temperature above the furnace cover of the electric furnace is extremely high, a flue gas analysis element and related cables cannot be installed on a flue gas elbow of the furnace cover of the electric furnace body. In the prior art, an electric furnace smoke analysis element or a smoke extraction probe is mainly arranged at the front part of a fixed water-cooling elbow behind a smoke elbow of an electric furnace cover, and is tried to obtain the smoke components of the previous time of mixed air consistent with those in an electric furnace. However, in actual production, due to fluctuation of smelting conditions in the electric furnace and real-time change of speed regulation of the dust removal fan, pressure at a mixed air section between the movable flue gas elbow and the fixed flue gas elbow of the electric furnace always fluctuates dynamically, so that the amount of mixed air entering the fixed flue gas elbow also fluctuates dynamically, and thus flue gas obtained by a flue gas analysis element or a flue gas extraction probe of the electric furnace is not pre-designed mixed air previous flue gas, a part of CO in the flue gas is mixed air with mixed air for secondary combustion, and the combustion proportion is fluctuated and cannot be estimated. In this case, the smoke components obtained by the smoke analysis system are disordered and deviate from the smoke components of the previous time of the preset monitoring mixed air, and finally the smoke data of the electric furnace smelting secondary model is wrong, so that the secondary model cannot accurately judge the actual smelting situation in the electric furnace.
In the prior art, an extraction type flue gas analysis system or a laser type flue gas analysis system in a flue, which is put into practical production, cannot accurately eliminate the influence of mixed air of smelting air of an electric furnace and secondary combustion of flue gas on the acquisition and utilization of flue gas data. Most of the electric furnace flue gas analysis systems put into practical use only effectively function by monitoring and analyzing H in flue gas2And H2And the O component changes and is used for judging whether water leakage occurs in the electric furnace. The key of the electric furnace steelmaking flue gas monitoring system lies in how to determine the type of flue gas collection and analysis and how to utilize the collected data, and how to determine the installation position and the collection mode of the flue gas collection and analysis system to effectively obtain the real data of the flue gas.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one defect of flue gas monitoring in the prior art, the utility model provides a real-time flue gas monitoring system for electric furnace steelmaking, which comprises: the system comprises a primary gas analyzer, a secondary gas analyzer, a temperature monitoring element, a flue gas flow monitoring element and a main control device; the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the flue gas flow monitoring element are all in communication connection with the main control device; wherein the content of the first and second substances,
the primary gas analyzer and the secondary gas analyzer are connected in series, secondary flue gas generated after mixed air combustion of the electric furnace is collected through the flue gas sampling probe, and the collected secondary flue gas enters the secondary gas analyzer after passing through the primary gas analyzer, so that gas component analysis is respectively carried out on the secondary flue gas;
the temperature monitoring element is used for acquiring secondary flue gas temperature data;
the smoke flow monitoring element is used for acquiring secondary smoke flow data;
and generating a real-time monitoring result according to the data acquired by the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the smoke flow monitoring element.
In an embodiment of the present invention, the system includes: two smoke sampling probes.
In the embodiment of the utility model, the two flue gas sampling probes are arranged in a flue gas pipeline before a combustion settling chamber for sending secondary flue gas into the combustion settling chamber, a flue gas combustion settling chamber, a high-temperature flue gas pipeline, a flue gas cooling device or a low-temperature flue gas pipeline.
In the embodiment of the utility model, the temperature monitoring element is arranged in a flue gas pipeline before a combustion settling chamber for sending the secondary flue gas into the combustion settling chamber.
In the embodiment of the utility model, the flue gas flow monitoring element is arranged on the low-temperature flue gas pipeline.
In an embodiment of the present invention, the monitoring system further includes: the two pressure monitoring elements are in communication connection with the main control device; wherein the content of the first and second substances,
the pressure monitoring element is arranged at the electric furnace door and used for acquiring the pressure at the electric furnace door;
and the other pressure monitoring element is arranged on the electric furnace cover and is used for collecting the pressure at the electric furnace cover.
The real-time monitoring system for the flue gas generated by the steelmaking of the electric furnace, provided by the utility model, is used for analyzing the gas components of the collected secondary flue gas generated after the mixed air combustion of the electric furnace by serially connecting the primary gas analyzer and the secondary gas analyzer; the temperature monitoring element acquires secondary flue gas temperature data; and the smoke flow monitoring element acquires secondary smoke flow data, and generates a real-time monitoring result according to the data acquired by the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the smoke flow monitoring element. Therefore, the secondary flue gas after the mixed air combustion of the electric furnace is collected, monitored and analyzed, and the smelting condition of the electric furnace is judged and analyzed in real time.
In order to make the aforementioned and other objects, features and advantages of the utility model comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of a flue gas monitoring system for monitoring flue gas according to an embodiment of the present invention.
Reference numerals:
1: is an electric furnace shell;
2: an electric furnace door;
3: a pressure monitoring element at the oven door;
4: the cover of the electric furnace;
5: a pressure monitoring element at the furnace lid;
6: an electric furnace electrode;
7: an electric furnace conductive cross arm;
8: a water-cooled elbow of the electric furnace cover;
9: the water-cooling loop can be adjusted;
10: a flue gas elbow in front of the combustion settling chamber;
11: a flue gas pipeline in front of the combustion settling chamber;
12: a temperature monitoring element before cooling of the flue gas;
131: an extraction type smoke sampling probe;
132: a primary gas analyzer;
133: a secondary gas analyzer;
14: an electric furnace flue gas combustion settling chamber;
15: a high temperature flue gas duct;
16: a flue gas cooling device;
17: a low temperature flue gas duct;
18: a flue gas flow monitoring element;
19: a temperature monitoring element after cooling the flue gas;
20: flue gas dust pelletizing system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.
The extraction type flue gas sampling system and the furnace gas temperature measuring instrument are arranged on the furnace cover of the electric furnace body, and because the furnace cover of the electric furnace body is lifted and rotated, and meanwhile, the temperature above the furnace cover of the electric furnace is extremely high, related elements and cables cannot be normally used. In the prior art, in order to avoid the problem that related elements and cables with extremely high temperature above the furnace cover of the electric furnace cannot be normally used, a removable flue gas sampling system is arranged at an inlet of a fixed flue so as to obtain the flue gas composition of the previous time of air mixing consistent with that in the electric furnace. However, in actual production, the pressure at the air mixing section between the movable flue gas elbow and the fixed flue gas elbow of the electric furnace fluctuates dynamically all the time, which causes the amount of air mixed into the fixed flue gas elbow to fluctuate dynamically, so that the flue gas obtained by the flue gas analysis element or the flue gas extraction probe of the electric furnace is not the flue gas of the previous air mixing designed in advance, a part of CO in the flue gas is mixed with the air of the mixed air and is combusted, the combustion ratio is fluctuated and cannot be estimated, and the data collected by the flue gas monitoring and analysis system is disordered.
In the prior art, a method of collecting flue gas components before air mixing is adopted to try to obtain obvious CO and CO similar to those in the converter smelting or vacuum refining process2The change point of the component proportion (the relative proportion of CO is obviously reduced when oxygen blowing and decarburization are carried out to a certain degree in the process of converter smelting or vacuum refining, and the relative proportion of CO is obviously reduced2The relative ratio is obviously increased, and the key change of the smoke components is usually used as a key point for guiding smelting), but the electric furnace is not a closed smelting process like a converter or vacuum refining, no material is input in the process, the whole smelting process of the electric furnace is in an open process, and the whole process of dynamic carbon spraying, oxygen blowing, natural gas blowing, carburant adding and the like is an open environment for real-time input and output, so that the proportion of the smoke components in the smelting process of the electric furnace fluctuates in real time and is disordered and has no key change point, so that the data of the proportion of the smoke components before air mixing in the prior art are invalid and cannot be utilized by a secondary system.
In view of this, the utility model provides a real-time monitoring system for flue gas generated in steel making of an electric furnace, which comprises: the system comprises a primary gas analyzer, a secondary gas analyzer, a temperature monitoring element, a flue gas flow monitoring element and a main control device; the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the flue gas flow monitoring element are all in communication connection with the main control device; wherein the content of the first and second substances,
the primary gas analyzer and the secondary gas analyzer are connected in series, secondary flue gas generated after mixed air combustion of the electric furnace is collected through the flue gas sampling probe, and the collected secondary flue gas enters the secondary gas analyzer after passing through the primary gas analyzer, so that gas component analysis is respectively carried out on the secondary flue gas;
the temperature monitoring element is used for acquiring secondary flue gas temperature data;
the smoke flow monitoring element is used for acquiring secondary smoke flow data;
and generating a real-time monitoring result according to the data acquired by the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the smoke flow monitoring element.
The real-time monitoring system for the electric furnace steelmaking flue gas is mainly characterized in that a gas analyzer, a temperature monitoring element and a flue gas flow monitoring element are arranged on an electric furnace body and an electric furnace dedusting pipeline system, necessary parameters of the electric furnace flue gas are collected by reasonably arranging a device for monitoring parameters such as the flue gas flow, components, temperature, pressure and the like of the electric furnace, and a main control device judges and analyzes the smelting condition of the electric furnace in real time through a series of preset model calculations.
Fig. 1 is a schematic view of a smoke monitoring system provided by the present invention for smoke monitoring.
The electric furnace flue gas treatment generally adopts a combustion method, and introduces ambient air through mixed air to completely combust CO in primary flue gas generated in the electric furnace. The primary flue gas component before the combustion of the unmixed air in the electric furnace mainly comprises CO and CO2、H2O、H2、N2、Ar、O2(ii) a The secondary flue gas component after the mixed air combustion of the electric furnace mainly contains CO2、H2O、N2、Ar、O2。
In the prior art, a flue gas component analyzer is mainly arranged at an outlet of a water-cooling elbow 8 of an electric furnace cover or an inlet of a flue gas elbow 10 in front of a combustion settling chamber 14, and the direct monitoring and analysis of the CO and CO of primary flue gas components before the unmixed air combustion are assumed2、H2O、H2、O2(ii) a However, due to the harsh smelting environment of the electric furnace and the narrow flue gas interval before the unmixed air is combusted, the effective primary flue gas data cannot be obtained in the actual production.
As shown in fig. 1, in the embodiment of the present invention, the flue gas flow monitoring element 18 can obtain the standard flow, the working condition flow and the flow speed of the completely combusted secondary flue gas after air mixing.
The temperature of the secondary flue gas which is completely combusted after air mixing is obtained by the temperature monitoring element 12 before cooling the flue gas.
H in the secondary flue gas after the mixed air is completely combusted is obtained by the primary gas analyzer 1322The volume ratio of O;
by passingThe secondary gas analyzer 133 removes H from the completely combusted secondary flue gas after obtaining the mixed air2CO after O2、O2、N2Ar volume ratio;
the main control device of the monitoring system can comprehensively obtain H in the secondary flue gas after air mixing and complete combustion according to the data acquired by the two-stage gas analyzer2O、CO2、O2、N2And Ar volume ratio.
The main control device of the monitoring system can calculate H in the secondary flue gas after completely burning after air mixing according to the standard flow and volume ratio2O、CO2、O2、N2And the volume flow rate of Ar.
Obtaining N2After the volume flow, the total volume flow of mixed air (including air permeated through a furnace door and an electrode hole in the electric furnace and ambient air introduced by secondary combustion mixed air) can be obtained, the proportion and the flow of oxygen in secondary flue gas of the electric furnace from the ambient air and the oxygen lance on the furnace wall can be finally obtained, and the effective utilization rate of the oxygen lance on the furnace wall can be tested by comparing with the oxygen input quantity of the oxygen lance on the furnace wall of the electric furnace.
In the embodiment of the utility model, the detection frequency of the monitoring element is in millisecond level, the smoke monitoring data can be regarded as continuous data, real-time curves of all oxygen elements, all carbon elements, all hydrogen elements, all nitrogen elements and all argon elements and temperature (energy) curves in the secondary smoke after air mixing and complete combustion can be obtained, and all cumulant can be obtained by integrating with time.
Through each monitoring element, parameters such as flow, temperature and components of secondary flue gas which is completely combusted after air mixing can be obtained, and external ambient air quantity can be detected, calculated and eliminated, so that an electric furnace flue gas output item corresponding to an electric furnace smelting input item is obtained, an electric furnace flue gas output model is established, the electric furnace flue gas output model is combined with an existing electric furnace material input model, an existing electric furnace material input model and an existing energy input model, a closed loop can be formed, and conditions are created for intelligent steelmaking of an electric furnace.
According to the utility model, the secondary flue gas after the mixed air combustion of the electric furnace is collected, monitored and analyzed, and the smelting condition of the electric furnace is judged and analyzed in real time.
In the embodiment of the present invention, the monitoring system further includes: the two pressure monitoring elements are in communication connection with the main control device; wherein the content of the first and second substances,
the pressure monitoring element is arranged at the electric furnace door and used for acquiring the pressure at the electric furnace door;
and the other pressure monitoring element is arranged on the electric furnace cover and is used for collecting the pressure at the electric furnace cover.
In the embodiment of the utility model, as shown in fig. 1, a furnace door pressure monitoring element 3 is arranged near an electric furnace door 2 and is used for monitoring the smoke pressure at the electric furnace door; a furnace cover pressure monitoring element 5 is arranged on an electric furnace cover 4 and used for monitoring the smoke pressure at the furnace cover. And adjusting and controlling the micro negative pressure of the two flue gas pressure monitoring points by adjusting the opening degree of the electric furnace door 2 and the opening degree of the adjustable water-cooling loop 9 according to the data acquired by the pressure monitoring element. The flue gas of the electric furnace is prevented from overflowing, the flue gas of the electric furnace is ensured to be acquired by the rear monitoring element, and the flue gas pressure of two pressure monitoring points needs to be micro negative pressure.
In the smelting process of the electric furnace, primary flue gas generated in the electric furnace leaves the electric furnace through a water-cooling elbow 8 of a furnace cover of the electric furnace and enters a flue gas elbow 10 in front of a combustion settling chamber of a rear dust removal system. An open circular seam structure is arranged between the water-cooling elbow 8 of the electric furnace cover and the front flue gas elbow 10 of the combustion settling chamber, so that the condition that external environment air enters the front flue gas elbow 10 of the combustion settling chamber and CO in primary flue gas in the electric furnace is combusted is met. An adjustable water-cooling loop 9 is arranged at the inlet of a flue gas elbow 10 in front of the combustion settling chamber, and the theoretical air combustion coefficient required by complete combustion of CO is met by controlling the entering amount of ambient air through adjusting the opening degree of the adjustable water-cooling loop 9. In actual production, the combustion range of CO in the flue gas in the electric furnace and the mixed ambient air is mainly in the area of the flue gas elbow 10 before the combustion settling chamber.
According to the utility model, the actual production situation is combined, the combustion range of CO in the primary flue gas in the electric furnace and the mixed ambient air is mainly in the area of a flue gas elbow 10 in front of a combustion settling chamber, and the area of a flue gas pipeline 11 in front of the combustion settling chamber is basically the secondary flue gas which is completely combusted after air mixing.
In the embodiment of the utility model, a flue gas cooling front temperature monitoring element 12 is arranged on a flue gas pipeline 11 in front of a combustion settling chamber so as to monitor the temperature of secondary flue gas which is completely combusted after air mixing. Therefore, the temperature of the secondary flue gas which is completely combusted after air mixing needs to be controlled within a reasonable range.
In the embodiment of the utility model, the monitoring system comprises two flue gas sampling probes, as shown in fig. 1, two sets of extraction type flue gas sampling probes 131 are arranged on the flue gas pipeline 11 in front of the combustion settling chamber, and the bodies of the extraction type flue gas sampling probes 131 are provided with high-temperature-resistant filter cores.
In production, one of the two sets of extraction type smoke sampling probes 131 normally extracts high-temperature smoke, the other set of extraction type smoke sampling probes reversely blows to prevent blockage and cool a sampling pipeline, and the two sets of extraction type smoke sampling probes cyclically and alternately extract the high-temperature smoke.
The high-temperature secondary flue gas extracted by the extraction type flue gas sampling probe 131 is filtered and then sequentially enters the primary gas analyzer 132 and the secondary gas analyzer 133.
In the embodiment of the utility model, the primary gas analyzer 132 mainly analyzes H in the secondary flue gas2The O, secondary gas analyzer 133 is configured with a flue gas cooling system for mainly analyzing CO in the secondary flue gas2、O2、N2And Ar. Wherein, the primary gas analyzer 132 and the secondary gas analyzer 133 are configured in series.
In the embodiment of the present invention, in order to identify the influence of the air mixing on the electric furnace flue gas and the electric furnace smelting, the N in the secondary flue gas is particularly subjected to the gas analysis by the secondary gas analyzer 1332Performing analysis by comparing N2The amount of air mixed and the total amount of oxygen brought by the air are calculated.
In the embodiment of the utility model, the electric furnace flue gas combustion settling chamber 14 is a sealing structure, and the joint parts of different components of the electric furnace flue gas combustion settling chamber 14 are sealed by adopting high-temperature-resistant sealing rings.
In the embodiment of the utility model, the secondary flue gas of the high-temperature electric furnace is cooled by the flue gas cooling device 16, enters the low-temperature flue gas pipeline 17 and finally enters the flue gas dust removal system 20.
In the embodiment of the utility model, a flue gas flow monitoring element 18 is arranged on the low-temperature flue gas pipeline 17 to monitor the secondary flue gas flow of the electric furnace, and a temperature monitoring element 19 after cooling the flue gas is arranged to monitor the temperature of the cooled low-temperature secondary flue gas.
The basic principle of monitoring data analysis of the utility model is as follows:
the standard flow, the working condition flow and the flow speed of the secondary flue gas which is completely combusted after air mixing are obtained through a flue gas flow monitoring element 18.
The temperature of the secondary flue gas which is completely combusted after air mixing is obtained by the temperature monitoring element 12 before cooling the flue gas.
H in the secondary flue gas after the mixed air is completely combusted is obtained by the primary gas analyzer 1322The volume ratio of O;
h is removed from the secondary flue gas which is completely combusted after the mixed air is obtained by the secondary gas analyzer 1332CO after O2、O2、N2Ar volume ratio;
the H in the secondary flue gas after completely burning after mixing air can be obtained by synthesizing the data acquired by the two-stage gas analyzer2O、CO2、O2、N2And Ar volume ratio.
Calculating to obtain H in the secondary flue gas after completely burning after mixing air according to the standard flow and volume ratio2O、CO2、O2、N2And the volume flow rate of Ar.
Obtaining N2After the volume flow, the total volume flow of mixed air (including air permeated through a furnace door and an electrode hole in the electric furnace and ambient air introduced by secondary combustion mixed air) can be obtained, the proportion and the flow of oxygen elements in secondary flue gas of the electric furnace from the ambient air and the furnace wall oxygen lance can be finally obtained, and the effective utilization rate of the furnace wall oxygen lance can be tested by comparing the oxygen element input with the oxygen input of the furnace wall oxygen lance of the electric furnace.
In the embodiment of the utility model, the detection frequency of the monitoring element is in millisecond level, the smoke monitoring data can be regarded as continuous data, real-time curves of all oxygen elements, all carbon elements, all hydrogen elements, all nitrogen elements and all argon elements and temperature (energy) curves in the secondary smoke after air mixing and complete combustion can be obtained, and all cumulant can be obtained by integrating with time.
Through each monitoring element, parameters such as flow, temperature and components of secondary flue gas which is completely combusted after air mixing can be obtained, and external ambient air quantity can be detected, calculated and eliminated, so that an electric furnace flue gas output item corresponding to an electric furnace smelting input item is obtained, an electric furnace flue gas output model is established, the electric furnace flue gas output model is combined with an existing electric furnace material input model, an existing electric furnace material input model and an existing energy input model, a closed loop can be formed, and conditions are created for intelligent steelmaking of an electric furnace.
In the embodiment of the utility model, the two flue gas sampling probes are arranged in a flue gas pipeline before a combustion settling chamber for sending secondary flue gas into the combustion settling chamber, a flue gas combustion settling chamber, a high-temperature flue gas pipeline, a flue gas cooling device or a low-temperature flue gas pipeline.
That is, as shown in fig. 1, the extraction type flue gas sampling probe 131 of the present invention is installed on the flue gas pipeline 11 before the combustion settling chamber as an optimal installation position. The extraction type flue gas sampling probe 131 can also be arranged on the flue gas combustion settling chamber 14, the high-temperature flue gas pipeline 15, the flue gas cooling device 16 or the low-temperature flue gas pipeline 17 according to actual conditions.
The secondary gas analyzer 133 of the present invention mainly analyzes CO in the secondary flue gas2、O2、N2And Ar, normal monitoring, analyzing and calculating requirements can be met. Can also increase the ratio of CO to H2、CH4Analysis of (normally 0) prevents erroneous operation in production.
According to the real-time monitoring system for the flue gas generated by the steelmaking of the electric furnace, the collected secondary flue gas generated after the mixed air combustion of the electric furnace is subjected to gas component analysis by serially connecting the primary gas analyzer and the secondary gas analyzer; the temperature monitoring element acquires secondary flue gas temperature data, the flue gas flow monitoring element acquires secondary flue gas flow data, and a real-time monitoring result is generated according to data acquired by the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the flue gas flow monitoring element. Therefore, the secondary flue gas after the mixed air combustion of the electric furnace is collected, monitored and analyzed, and the smelting condition of the electric furnace is judged and analyzed in real time.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The terms "upper", "lower", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description. Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the utility model, various features of the utility model are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the utility model as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention is not limited to any single aspect, nor is it limited to any single embodiment, nor is it limited to any combination and/or permutation of these aspects and/or embodiments. Moreover, each aspect and/or embodiment of the present invention may be utilized alone or in combination with one or more other aspects and/or embodiments thereof.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The principle and the implementation mode of the utility model are explained by applying specific embodiments in the utility model, and the description of the embodiments is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. The utility model provides an electric stove steelmaking flue gas real-time monitoring system which characterized in that, the system include: the system comprises a primary gas analyzer, a secondary gas analyzer, a temperature monitoring element and a flue gas flow monitoring element; the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the flue gas flow monitoring element are all in communication connection with a main control device outside the system; wherein the content of the first and second substances,
the primary gas analyzer and the secondary gas analyzer are connected in series, secondary flue gas generated after mixed air combustion of the electric furnace is collected through the flue gas sampling probe, and the collected secondary flue gas enters the secondary gas analyzer after passing through the primary gas analyzer, so that gas component analysis is respectively carried out on the secondary flue gas;
the temperature monitoring element is used for acquiring secondary flue gas temperature data;
the smoke flow monitoring element is used for acquiring secondary smoke flow data;
and the main control device outside the system generates a real-time monitoring result according to the data acquired by the primary gas analyzer, the secondary gas analyzer, the temperature monitoring element and the flue gas flow monitoring element.
2. The real-time flue gas monitoring system for electric steelmaking of claim 1, wherein said system comprises: two smoke sampling probes.
3. The real-time flue gas monitoring system for electric furnace steelmaking according to claim 2, wherein the two flue gas sampling probes are arranged in a flue gas pipeline before the combustion settling chamber for feeding the secondary flue gas into the combustion settling chamber, a flue gas combustion settling chamber, a high-temperature flue gas pipeline, a flue gas cooling device or a low-temperature flue gas pipeline.
4. The real-time flue gas monitoring system for electric furnace steelmaking of claim 1, wherein the temperature monitoring element is disposed in a flue gas duct before the combustion settling chamber that feeds the secondary flue gas into the combustion settling chamber.
5. The real-time flue gas monitoring system for electric steelmaking of claim 1, wherein the flue gas flow monitoring element is disposed in the low temperature flue gas duct.
6. The real-time flue gas monitoring system for electric steelmaking of claim 1, wherein said monitoring system further comprises: the two pressure monitoring elements are in communication connection with the main control device; wherein the content of the first and second substances,
the pressure monitoring element is arranged at the electric furnace door and used for acquiring the pressure at the electric furnace door;
and the other pressure monitoring element is arranged on the electric furnace cover and is used for collecting the pressure at the electric furnace cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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