Converter flue gas analysis system and method based on non-dispersive infrared technology

Abstract

According to the converter flue gas analysis system and method based on the non-dispersive infrared technology, the non-dispersive infrared technology based on the gas absorption theory is adopted, the flue gas is transmitted to the analysis cabin through the non-contact optical fibers to be pretreated, then various components of the flue gas are analyzed, and therefore the converter process is accurately controlled, and the converter flue gas analysis efficiency is improved. The method is beneficial to reducing inclusions and defects in steel, producing higher-quality steel, meeting the requirements of the market for high-quality steel, optimizing energy use, reducing waste of raw materials, reducing the production cost of steelmaking and enhancing the market competitiveness of enterprises; the emission of pollutants in the converter flue gas is effectively reduced, the pressure on the environment is relieved, the requirements of environmental protection laws and regulations are met, and the sustainable development of enterprises is promoted; data support is provided for innovation and improvement of a converter steelmaking process, and technical progress of the metallurgical industry is promoted; according to the flue gas analysis result, equipment maintenance and repair plans are reasonably arranged, and equipment faults and safety accidents are prevented.

Description

Technical Field

[0001] The invention relates to the technical field of converter steelmaking detection, in particular to a converter flue gas analysis method based on non-dispersive infrared technology. Background Art

[0002] Converter steelmaking uses molten iron, scrap steel and ferroalloy as the main raw materials. It does not rely on external energy sources, but relies on the physical heat of the molten iron itself and the heat generated by the chemical reaction between the components of the molten iron to complete the steelmaking process in the converter. Converters are divided into acidic and alkaline types according to the refractory materials, and top-blown, bottom-blown and side-blown according to the position where the gas is blown into the furnace; they are divided into air converters and oxygen converters according to the type of gas. Alkaline oxygen top-blown and top-bottom combined-blown converters are the most commonly used steelmaking equipment due to their fast production speed, large output, high single-furnace output, low cost and low investment.

[0003] With the development of science and technology, converter steelmaking technology is also shifting towards automated and intelligent production. Among them, converter flue gas detection is an important part of intelligent production. By real-time mastering the flue gas composition, especially the content of oxygen, carbon monoxide, carbon dioxide, etc., it provides a basis for accurately controlling the oxygen blowing time, intensity and rhythm, which can improve steelmaking efficiency and molten steel quality; at the same time, by detecting the flue gas composition, the progress and status of the chemical reaction in the furnace can be mastered, abnormalities can be discovered in time, and the feeding and operating parameters can be adjusted to ensure the stable operation of the converter; in addition, converter flue gas detection can understand the content of harmful impurities in the flue gas, and then take measures to reduce the generation of impurities and improve the purity of molten steel; through the analysis of flue gas composition, the energy supply and combustion conditions can be reasonably adjusted to reduce energy consumption, reduce greenhouse gas emissions, and achieve the effect of energy conservation and emission reduction; however, the current existing technology lacks a mature solution for real-time detection of converter flue gas.

[0004] Therefore, there is an urgent need for a converter flue gas analysis method based on non-dispersive infrared technology that can solve the above problems. Summary of the invention

[0005] At present, there is no accurate and real-time online continuous flue gas analysis system for converters. The purpose of the present invention is to provide a converter flue gas analysis method based on non-dispersive infrared technology to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a converter flue gas analysis system based on non-dispersive infrared technology, comprising a converter, wherein the converter is provided with a flue gas emission pipe, wherein the flue gas emission pipe is connected with an air chamber through a detection pipe, wherein a non-dispersive infrared detection device is provided in the air chamber, wherein the non-dispersive infrared detection device establishes communication with an analysis hut, and the analysis hut establishes communication with a management platform.

[0008] Preferably, an air inlet is provided at the top of the air chamber, an air outlet is provided at the bottom of the air chamber, and an induced draft fan is provided at the air outlet.

[0009] Preferably, the non-dispersive infrared detection equipment includes an infrared light source, a detector group is provided on the opposite side of the infrared light source, an optical filter is provided on the side between the infrared light source and the detector group close to the infrared light source, and a narrow-band filter is provided on the side between the infrared light source and the detector group close to the detector group.

[0010] Preferably, the detector group includes a non-dispersive infrared sensor and a semiconductor sensor.

[0011] Preferably, a signal receiving module and a signal sending module are provided in the analysis cabin, the signal receiving module establishes communication with the detector group through non-contact optical fiber, the signal sending module establishes communication with the management platform, and a signal preprocessing module is connected between the signal receiving module and the signal sending module.

[0012] Preferably, the signal preprocessing module includes an amplification module, a noise reduction module, an analog-to-digital conversion module and a storage module.

[0013] Preferably, the management platform includes a communication module, a login module, an analysis and calculation module, a comparison module, a display module and an alarm module.

[0014] Preferably, the communication module is wirelessly connected to the signal sending module and the intelligent terminal device respectively.

[0015] The present invention also provides a converter flue gas analysis method based on non-dispersive infrared technology, comprising the following steps:

[0016] S1. Introducing converter flue gas into the air chamber;

[0017] S2. The light emitted by the infrared light source passes through an optical filter to form infrared light of a specific wavelength that can be absorbed by the target gas molecules and irradiates the smoke to be detected. The target gas molecules in the smoke to be detected absorb the infrared light of a specific wavelength and undergo energy level transitions to produce intensity changes. The light passes through a narrow-band filter and is received by the detector group.

[0018] S3. The optical signal received by the detector group is transmitted to the analysis room through non-contact optical fiber for amplification, filtering, and digital preprocessing;

[0019] S4. The pre-processed signal is transmitted to the management platform for analysis, and the management personnel log in to the management platform to view the analysis results.

[0020] 11. The converter flue gas analysis method based on non-dispersive infrared technology according to claim 9, characterized in that it also includes:

[0021] S5. The management platform compares the analysis results with the preset normal range of flue gas component concentrations and issues an alarm when the analysis results are abnormal.

[0022] Compared with the prior art, the present invention has achieved the following beneficial technical effects:

[0023] The present invention provides a converter flue gas analysis system and method based on non-dispersive infrared technology. The system and method adopt non-dispersive infrared technology based on gas absorption theory, and conduct the flue gas to an analysis room through non-contact optical fiber for pre-treatment and then analyze the various components of the flue gas, thereby accurately controlling the converter process, helping to reduce inclusions and defects in steel, produce higher quality steel, meet the market demand for high-quality steel, optimize energy use and reduce waste of raw materials, and can reduce the production cost of steelmaking and enhance the market competitiveness of enterprises; effectively reduce the emission of pollutants in converter flue gas, reduce the pressure on the environment, comply with environmental protection laws and regulations, and promote the sustainable development of enterprises; provide data support for the innovation and improvement of converter steelmaking process, and promote technological progress in the metallurgical industry; according to the flue gas analysis results, reasonably arrange equipment maintenance and overhaul plans to prevent equipment failures and safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 A schematic diagram of a converter flue gas analysis system based on non-dispersive infrared technology provided by the present invention;

[0026] Figure 2 A schematic diagram of the gas chamber structure in a converter flue gas analysis system based on non-dispersive infrared technology provided by the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] At present, there is no accurate and real-time online continuous flue gas analysis system for converters. The purpose of the present invention is to provide a converter flue gas analysis system and method based on non-dispersive infrared technology to solve the problems existing in the prior art.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Embodiment 1:

[0031] This embodiment provides a converter flue gas analysis system based on non-dispersive infrared technology, such as Figure 1 and 2 As shown, it includes a converter 1, which is provided with a flue gas exhaust pipe 2. The flue gas exhaust pipe 2 is connected to an air chamber 4 through a detection pipe 3. A non-dispersive infrared detection device is provided in the air chamber 4. The non-dispersive infrared detection device establishes communication with an analysis hut 5, and the analysis hut 5 establishes communication with a management platform 6.

[0032] As an implementation mode, an air inlet 41 is provided at the top of the air chamber 4 , an air outlet 42 is provided at the bottom of the air chamber, and an induced draft fan is provided at the air outlet 42 , thereby ensuring that the converter flue gas can be smoothly introduced into the air chamber 4 .

[0033] As an embodiment, the non-dispersive infrared detection device includes an infrared light source 7, a detector group 8 is provided on the opposite side of the infrared light source 7, an optical filter 9 is provided between the infrared light source 7 and the detector group 8 on the side close to the infrared light source 7, and a narrow-band filter 10 is provided between the infrared light source 7 and the detector group 8 on the side close to the detector group 8.

[0034] As an embodiment, the detector group 8 includes a non-dispersive infrared sensor and a semiconductor sensor, wherein the non-dispersive infrared sensor is used to detect carbon monoxide and carbon dioxide, the semiconductor sensor is used to detect hydrogen, and oxygen is obtained by calculation.

[0035] Non-dispersive infrared sensors can measure a variety of gas components and have a wide measurement range, which can meet the needs of converters. They also have high measurement accuracy and can accurately measure gas concentrations. They also have a fast response speed and can monitor changes in gas concentration in real time, which is very important for application scenarios that require rapid response, such as converter intelligent steelmaking systems. Most importantly, they have high reliability and stability, can operate stably for a long time in harsh industrial environments, have relatively low operating costs, and are easy to implement on a large scale.

[0036] As an implementation mode, a signal receiving module and a signal sending module are provided in the analysis cabin 5. The signal receiving module establishes communication with the detector group via non-contact optical fiber, which can effectively avoid the influence of direct contact on the signal. The signal sending module establishes communication with the management platform 6, and a signal preprocessing module is connected between the signal receiving module and the signal sending module.

[0037] As an implementation mode, the signal preprocessing module includes an amplification module, a noise reduction module, an analog-to-digital conversion module and a storage module, and can preprocess the detection signal.

[0038] As an implementation mode, the management platform 6 includes a communication module, a login module, an analysis and calculation module, a comparison module, a display module and an alarm module, which are respectively used for communication, login, analysis, comparison, display and alarm.

[0039] As an implementation mode, the communication module is wirelessly connected to the signal sending module and the intelligent terminal device 11 respectively, so as to realize remote monitoring.

[0040] This embodiment also provides a converter flue gas analysis method based on the above system, comprising the following steps:

[0041] S1. Introducing converter flue gas into the air chamber 4;

[0042] S2. The light emitted by the infrared light source 7 passes through the optical filter 9 to form infrared light of a specific wavelength that can be absorbed by the target gas molecules and irradiates the smoke to be detected. The target gas molecules in the smoke to be detected absorb the infrared light of a specific wavelength and undergo energy level transition to produce intensity changes. The light passes through the narrow-band filter 10 and is received by the detector group 8;

[0043] S3. The optical signal received by the detector group 8 is transmitted to the analysis room 5 through a non-contact optical fiber for amplification, filtering, and digital preprocessing;

[0044] S4. The preprocessed signal is transmitted to the management platform 6 for analysis, and the management personnel log in to the management platform 6 to view the analysis results;

[0045] S5. The management platform 6 compares the analysis result with the preset normal range of flue gas component concentration and issues an alarm when the analysis result is abnormal.

[0046] The present invention provides a converter flue gas analysis system and method based on non-dispersive infrared technology. The system and method adopt non-dispersive infrared technology based on gas absorption theory, and conduct the flue gas to an analysis room through non-contact optical fiber for pre-treatment and then analyze the various components of the flue gas, thereby accurately controlling the converter process, helping to reduce inclusions and defects in steel, produce higher quality steel, meet the market demand for high-quality steel, optimize energy use and reduce waste of raw materials, and can reduce the production cost of steelmaking and enhance the market competitiveness of enterprises; effectively reduce the emission of pollutants in converter flue gas, reduce the pressure on the environment, comply with environmental protection laws and regulations, and promote the sustainable development of enterprises; provide data support for the innovation and improvement of converter steelmaking process, and promote technological progress in the metallurgical industry; according to the flue gas analysis results, reasonably arrange equipment maintenance and overhaul plans to prevent equipment failures and safety accidents.

[0047] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A converter flue gas analysis system based on non-dispersive infrared technology, comprising a converter, wherein the converter is provided with a flue gas exhaust pipe, characterized in that: The smoke exhaust pipe is connected to the air chamber through a detection pipe. A non-dispersive infrared detection device is arranged in the air chamber. The non-dispersive infrared detection device establishes communication with the analysis room, and the analysis room establishes communication with the management platform.

2. The converter flue gas analysis system based on non-dispersive infrared technology according to claim 1 is characterized in that: An air inlet is arranged at the top of the air chamber, an air outlet is arranged at the bottom of the air chamber, and an induced draft fan is arranged at the air outlet.

3. The converter flue gas analysis system based on non-dispersive infrared technology according to claim 1 is characterized in that: The non-dispersive infrared detection equipment includes an infrared light source, a detector group is provided on the opposite side of the infrared light source, an optical filter is provided on the side between the infrared light source and the detector group close to the infrared light source, and a narrow-band filter is provided on the side between the infrared light source and the detector group close to the detector group.

4. The converter flue gas analysis system based on non-dispersive infrared technology according to claim 3 is characterized in that: The detector group includes a non-dispersive infrared sensor and a semiconductor sensor.

5. The converter flue gas analysis system based on non-dispersive infrared technology according to claim 3 is characterized in that: A signal receiving module and a signal sending module are provided in the analysis room. The signal receiving module establishes communication with the detector group through non-contact optical fiber, and the signal sending module establishes communication with the management platform. A signal preprocessing module is connected between the signal receiving module and the signal sending module.

6. The converter flue gas analysis system based on non-dispersive infrared technology according to claim 5 is characterized in that: The signal preprocessing module includes an amplification module, a noise reduction module, an analog-to-digital conversion module and a storage module.

7. The converter flue gas analysis system based on non-dispersive infrared technology according to claim 5 is characterized in that: The management platform includes a communication module, a login module, an analysis and calculation module, a comparison module, a display module and an alarm module.

8. The converter flue gas analysis system based on non-dispersive infrared technology according to claim 7 is characterized in that: The communication module is wirelessly connected to the signal sending module and the intelligent terminal device respectively.

9. A converter flue gas analysis method based on non-dispersive infrared technology, characterized in that: The following steps are involved: S1. Introducing converter flue gas into the air chamber; S2. The light emitted by the infrared light source passes through an optical filter to form infrared light of a specific wavelength that can be absorbed by the target gas molecules and irradiates the smoke to be detected. The target gas molecules in the smoke to be detected absorb the infrared light of a specific wavelength and undergo energy level transitions to produce intensity changes. The light passes through a narrow-band filter and is received by the detector group. S3. The optical signal received by the detector group is transmitted to the analysis room through non-contact optical fiber for amplification, filtering, and digital preprocessing; S4. The pre-processed signal is transmitted to the management platform for analysis, and the management personnel log in to the management platform to view the analysis results.

10. The converter flue gas analysis method based on non-dispersive infrared technology according to claim 9, characterized in that: Also includes: S5. The management platform compares the analysis results with the preset normal range of flue gas component concentrations and issues an alarm when the analysis results are abnormal.

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