CN211645304U - Converter flue gas on-line monitoring device - Google Patents
Converter flue gas on-line monitoring device Download PDFInfo
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- CN211645304U CN211645304U CN201922321111.3U CN201922321111U CN211645304U CN 211645304 U CN211645304 U CN 211645304U CN 201922321111 U CN201922321111 U CN 201922321111U CN 211645304 U CN211645304 U CN 211645304U
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Abstract
The application discloses converter flue gas on-line monitoring device, including sampling device, analytical equipment and display device, sampling device includes the sampler: the device is placed at a converter flue and used for collecting samples; a primary filtering device: is connected with the sampler pipeline; a nitrogen back flushing device: is connected with the primary filtering device through a pipeline; a secondary filtering device: is connected with the primary filtering device through a pipeline; heating a box: the secondary filtering device is placed in the heating box to heat the sample, and the temperature of the sample is ensured to be above 100 ℃; an analysis device: is connected with the secondary filtering device through a pipeline; a display device: and is electrically connected with the analysis device. The online monitoring device for the converter flue gas can monitor parameters and components of the flue gas analysis equipment in real time through the display device, facilitates point inspection of the equipment and provides a reference basis for production of the converter; the back flushing of the nitrogen to the primary filtering device can reduce the blocking rate of the primary filtering device and improve the operation rate of the equipment.
Description
Technical Field
The application relates to the technical field of steelmaking, in particular to a converter flue gas online monitoring device.
Background
In the prior art, by utilizing a flue gas analysis technology, the smelting process of the converter can be stabilized, the occurrence of abnormal furnace conditions such as splashing, drying returning and the like is reduced, the hit rate of the end point carbon and the temperature of the converter is improved, and the economic benefit is improved.
Due to the influence of steel-making conditions, the flue gas analysis equipment operates in a high-temperature and high-dust complex environment, the operation state of the equipment is influenced by various factors, and the point inspection and maintenance are required to be performed regularly in order to ensure the normal operation of the equipment. The flue gas analysis equipment and the operation state monitoring and control panel thereof are usually installed in a container house fully distributed with equipment such as gas pipelines and the like, belong to a heavy gas area, and point inspection and maintenance personnel must be equipped with a gas alarm in the operation process, so that the point inspection is inconvenient. And the abnormal operation alarm of the equipment is difficult to find in time, and the maintenance can not be carried out in time, so that the failure rate of the equipment is high. Equipment failures that frequently occur at present include: the sample gas pretreatment system is blocked; the main flue gas pipeline system is not tightly sealed and has leakage. In addition, the operator may wish to determine the decarburization in the furnace by referring to the flue gas composition during the steel making process, and further guide the steel making.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a converter flue gas on-line monitoring device to overcome not enough among the prior art.
In order to achieve the above object, the utility model provides a following technical scheme: the converter flue gas on-line monitoring device comprises a sampling device, an analysis device and a display device, wherein the analysis device and the display device are used for analyzing samples collected by the sampling device, and the sampling device comprises
A sampler: the device is placed at a converter flue and used for collecting samples;
a primary filtering device: the sampler pipeline is connected with the dust collector and is used for filtering dust in the sample at one time;
a nitrogen pressurization device: the pipeline is connected with the primary filtering device and is used for pressurizing nitrogen in the nitrogen back flushing device;
a nitrogen back flushing device: the nitrogen pressurization device is connected with the pipeline and is used for carrying out back flushing on the primary filtering device;
a secondary filtering device: the dust filter is connected with the primary filtering device through a pipeline and is used for filtering dust in the sample for the second time;
heating a box: the secondary filtering device is placed in the heating box to heat the sample, and the temperature of the sample is ensured to be above 100 ℃;
an analysis device: is connected with the secondary filtering device through a pipeline and is used for analyzing the components of the sample;
a display device: and the analysis device is electrically connected with the analysis device and displays the analysis result of the analysis device and the running state parameters of the analysis device.
Preferably, the method further comprises the following steps: the air pump is used for increasing pressure to the sample, one end of the air pump is connected with the second-stage filtering device pipeline, the other end of the air pump is connected with the analysis device pipeline, and the air pump is placed in the heating box.
Preferably, the primary filtering device can filter dust with the particle size of more than 10 microns in the sample; the secondary filtering device can filter dust with the particle size of more than 2 microns in the sample.
Preferably, the nitrogen pressurization device is a pressurization pump, the nitrogen backflushing device is a nitrogen backflushing box, and the analysis device is an online mass spectrometer.
Further, the normal working parameters of the online mass spectrometer are that the ambient temperature is 18 +/-5 ℃, and the ambient CO concentration<25ppm, ambient O2Concentration of>18%, the equipment pressure of the online mass spectrometer is more than 5.5bar, and the gas inlet flow of the online mass spectrometer is 550-1000 cc/min.
Preferably, a valve body is arranged between the primary filtering device and the secondary filtering device, and a valve body is arranged between the air suction pump and the analysis device.
Preferably, the sampling device comprises two sets of identical first sampling devices and second sampling devices, and the first sampling devices and the second sampling devices alternately sample according to the heat; the first sampling device includes: the device comprises a first sampler, a first nitrogen pressurizing pump, a first nitrogen backflushing device, a first primary filtering device, a first secondary filtering device and a first air pump; the second sampling device includes: the second sampler, the second nitrogen booster pump, the second nitrogen backflushing device, the second primary filtering device, the second secondary filtering device and the second air pump.
Compared with the prior art, the on-line monitoring device for the converter flue gas can monitor the components of the flue gas in the converter in real time through the display device, and provides convenience for production of the converter; meanwhile, the working state of the online mass spectrometer can be monitored in real time, and the stable operation of equipment is ensured. In addition, the backflushing nitrogen is pressurized by the pressurizing pump to backflush the primary filtering device, so that the blockage of the primary filtering device can be effectively reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be 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 described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an online monitoring device for converter flue gas according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example 1
With reference to fig. 1, the device for on-line monitoring of converter flue gas of the present application includes a first sampling device and a second sampling device that are identical, an on-line analysis mass spectrometer 3, and a display device 4, wherein the first sampling device and the second sampling device alternately sample according to a heat. The sampling device collects a flue gas sample from a converter flue, the flue gas sample enters the mass spectrometer 3, the mass spectrometer 3 performs online analysis, and then a flue gas analysis result and operating parameters of flue gas analysis equipment are displayed on the display device 4.
In this technical solution, the display device 4 may be a display screen of a human-computer interaction interface, or any display device in the prior art that can implement the functions of the present application.
The first sampling device comprises a first sampling probe 101, a first primary filtering device 102, a first nitrogen pressurizing pump 103, a first nitrogen backflushing device 104, a first secondary filtering device 105 and a first air pump 106; the first sampling probe 101 is used at a temperature of about 110 ℃. The number of times the first sampling probe 101 is used and the temperature parameter are recorded by the display device 4. The first sampling probe 101 is connected with a first primary filtering device 102 through a pipeline, and the first primary filtering device 102 can filter dust larger than 10 micrometers in flue gas; the first primary filtering device 102 is connected with a first nitrogen pressurizing pump 103 through a pipeline, the first nitrogen pressurizing pump 103 can pressurize the nitrogen backflushing gas and then convey the pressurized gas to the first primary filtering device 102, and dust on a filter screen of the first primary filtering device 102 is removed; the first nitrogen gas pressurizing pump 103 is connected with a first nitrogen gas backflushing box 104 through a pipeline; the first primary filtering device 102 is connected with the first secondary filter 105 through a pipeline, and the first secondary filtering device 105 can filter dust with the particle size of more than 2 microns in the sampled flue gas; the first secondary filter 105 is connected with the first air pump 106 through a pipeline, a valve body is arranged between the first primary filtering device 102 and the first secondary filter, the valve body is used for controlling the flow of gas flowing into the first air pump 106, the pressure of gas entering the first air pump is-0.1 to-0.3 bar, and the pressure of gas exiting the first air pump is 0.2 to 0.35 bar; the first air pump 106 is connected with the online mass spectrometer 3 through a pipeline, a valve body is arranged in the pipeline to control the flow speed of the sampled smoke, and the flow rate of the sampled smoke is 14-19 liters/minute. The first air pump 106 is connected with the first secondary filter device 105 through a pipeline, and the flow of flue gas entering the online mass spectrometer after filtration is about 0.2-1 liter/minute. The exhaust gas of the first secondary filter device 105 and the online mass spectrometer 3 after passing through the first air pump 106 is discharged through an exhaust gas discharge pipe, and the flow rate of the exhaust gas discharge is 10 liters/minute.
The second sampling device comprises a second sampling probe 201, a second primary filtering device 202, a second nitrogen pressurizing pump 203, a second nitrogen backflushing device 204, a second secondary filtering device 205 and a second air pump 206; the second sampling probe 201 is used at a temperature of about 110 ℃. The number of uses of the second sampling probe 201 and the temperature parameters are recorded by the display device 4. The second sampling probe 201 is connected with a second primary filtering device 202 through a pipeline, and the second primary filtering device 202 can filter dust larger than 10 microns in the flue gas; the second primary filtering device 202 is connected with a second nitrogen pressurizing pump 203 through a pipeline, and the second nitrogen pressurizing pump 103 can pressurize the nitrogen backflushing gas and then convey the nitrogen backflushing gas to the second primary filtering device 102 to remove dust on a filter screen of the second primary filtering device 102; the second nitrogen pressurization pump is connected with the second nitrogen backflushing box 204 through a pipeline; the second primary filtering device 202 is connected with the second secondary filtering device 205 through a pipeline, and the second secondary filtering device 205 can filter dust with the particle size of more than 2 microns in the sampled flue gas; the second secondary filtering device 205 is connected with the second air pump 206 through a pipeline, a valve body is arranged between the second primary filtering device 202 and the second secondary filtering device 205 and used for controlling the flow of gas flowing into the second air pump 206, the pressure of gas entering the second booster pump is-0.3 to-0.1 bar, the pressure of gas exiting the pump is 0.2 to 0.35bar, and the flow of sample gas is 14 to 19 liters per minute. The second air pump 206 is connected with the online mass spectrometer 3 through a pipeline and is provided with a valve body therein to control the flow rate of the sampled flue gas. The exhaust gas after passing through the second suction pump device 206 was discharged through an exhaust gas discharge pipe at a flow rate of 10 liters/minute.
The on-line monitoring device for the converter flue gas further comprises a heating box body 5, wherein a first air extracting and pressurizing pump 106, a first secondary filtering device 105, a second air extracting pump 206 and a second secondary filtering device 205 are arranged in the heating box body 5, and the heating box body 5 heats the equipment and the connecting pipeline, so that the temperature of the sampled flue gas is ensured to be above 100 ℃.
The main parameters for the normal operation of the online mass spectrometer 3 are: the ambient temperature is 18 +/-5 ℃, and when the ambient temperature is higher than the normal temperature<When the temperature is 13 ℃, the ambient temperature is too low, the alarm display is carried out, and when the ambient temperature is too low>When the temperature is 23 ℃, the alarm display is carried out when the environmental temperature is too high; ambient CO<25ppm, when the CO concentration is more than or equal to 25 ℃, the overhigh CO content is displayed by alarm; environment O2>18% vol when O2<When the oxygen content is 18% vol, alarming and displaying that the oxygen content in the environment is too low; the equipment pressure is higher than 5.5bar, and when the equipment pressure is lower than 5.5bar, the equipment pressure low alarm display is triggered; mass inflow to mass spectrometer flow>550cc/min, and when the mass spectrometer flow is lower than 550cc/min, the mass spectrometer flow is low and alarm is displayed.
Display device 4 shows smoke components including H2、CO、N2、O2、Ar、CO2And H2And O. N before and after system analysis279% of O2Is 21 percent; n in the course of analysis2>1%, generally between 10 &25％，O2Approximately equals to 0, CO rises from the beginning of analysis and can reach 60-65% at the most, and then falls to 0. The sum of all the ingredients equals 100%. The online mass spectrometer 3 requires periodic calibration of the measured gas during use.
The online monitoring device for the converter flue gas can monitor the operation parameters of the flue gas analysis equipment and the components of the flue gas in the converter in real time through the display device, is convenient for the equipment to check, and provides a reference basis for the production of the converter; the pressurized nitrogen gas backflushes the primary filtering device, so that the blocking rate of the primary filtering device is reduced, and the operation rate of equipment is improved.
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 foregoing is merely a detailed description of the present application, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application, and these should also be considered as the protection scope of the present application.
Claims (8)
1. The utility model provides a converter flue gas on-line monitoring device which characterized in that: comprises a sampling device, an analysis device and a display device, wherein the analysis device and the display device are used for analyzing samples collected by the sampling device, and the sampling device comprises
A sampler: the device is placed at a converter flue and used for collecting samples;
a primary filtering device: the sampler pipeline is connected with the dust collector and is used for filtering dust in the sample at one time;
a nitrogen pressurization device: the pipeline is connected with the primary filtering device and is used for pressurizing nitrogen in the nitrogen back flushing device;
a nitrogen back flushing device: the nitrogen pressurization device is connected with the pipeline and is used for carrying out back flushing on the primary filtering device;
a secondary filtering device: the dust filter is connected with the primary filtering device through a pipeline and is used for filtering dust in the sample for the second time;
heating a box: the secondary filtering device is placed in the heating box to heat the sample, and the temperature of the sample is ensured to be above 100 ℃;
an analysis device: is connected with the secondary filtering device through a pipeline and is used for analyzing the components of the sample;
a display device: and the analysis device is electrically connected with the analysis device and displays the analysis result of the analysis device and the operation parameters of the analysis device.
2. The on-line monitoring device for the converter flue gas as recited in claim 1, characterized in that: further comprising: the air pump is used for increasing pressure to the sample, one end of the air pump is connected with the second-stage filtering device pipeline, the other end of the air pump is connected with the analysis device pipeline, and the air pump is placed in the heating box.
3. The on-line monitoring device for the converter flue gas as recited in claim 1, characterized in that: the primary filtering device can filter dust with the particle size of more than 10 microns in the sample; the secondary filtering device can filter dust with the particle size of more than 2 microns in the sample.
4. The on-line monitoring device for the converter flue gas as recited in claim 1, characterized in that: the nitrogen pressurization device is a pressurization pump, the nitrogen backflushing device is a nitrogen backflushing box, and the analysis device is an online mass spectrometer.
5. The on-line monitoring device for the converter flue gas as recited in claim 4, characterized in that: the normal working parameters of the online mass spectrometer are that the ambient temperature is 18 +/-5 ℃, and the concentration of CO in the environment<25ppm, ambient O2Concentration of>18%, the equipment nitrogen pressure of the online mass spectrometer is greater than 5.5bar, and the gas inlet flow of the online mass spectrometer is 550-1000 cc/min.
6. The on-line monitoring device for the converter flue gas as recited in claim 1, characterized in that: a valve body is arranged between the primary filtering device and the secondary filtering device, and a valve body is arranged between the secondary filtering device and the analysis device.
7. The on-line monitoring device for the converter flue gas as recited in claim 1, characterized in that: the sampling device comprises two sets of identical first sampling devices and second sampling devices, and the first sampling devices and the second sampling devices alternately sample according to the heat; the first sampling device includes: the device comprises a first sampler, a first nitrogen pressurizing pump, a first nitrogen backflushing device, a first primary filtering device, a first secondary filtering device and a first air pump; the second sampling device includes: the second sampler, the second nitrogen booster pump, the second nitrogen backflushing device, the second primary filtering device, the second secondary filtering device and the second air pump.
8. The on-line monitoring device for the converter flue gas as recited in claim 5, characterized in that: the monitoring device further comprises an alarm display device, when the working environment data of the online analytical mass spectrometer is not in a normal range value, the alarm display device is triggered, and the alarm display device is a computer display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922321111.3U CN211645304U (en) | 2019-12-20 | 2019-12-20 | Converter flue gas on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922321111.3U CN211645304U (en) | 2019-12-20 | 2019-12-20 | Converter flue gas on-line monitoring device |
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| CN211645304U true CN211645304U (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112301183A (en) * | 2020-10-30 | 2021-02-02 | 张家港宏昌钢板有限公司 | Equipment for monitoring reaction condition in converter in real time and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112301183A (en) * | 2020-10-30 | 2021-02-02 | 张家港宏昌钢板有限公司 | Equipment for monitoring reaction condition in converter in real time and using method thereof |
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