CN109520682A - A kind of on-line monitoring system and method applied to air leakage rate of sintering machine - Google Patents
A kind of on-line monitoring system and method applied to air leakage rate of sintering machine Download PDFInfo
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- CN109520682A CN109520682A CN201811645510.9A CN201811645510A CN109520682A CN 109520682 A CN109520682 A CN 109520682A CN 201811645510 A CN201811645510 A CN 201811645510A CN 109520682 A CN109520682 A CN 109520682A
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- bellows
- trolley
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- sintering machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
Abstract
The invention discloses a kind of on-line monitoring systems and method applied to air leakage rate of sintering machine, in sintering process, trolley is mobile from the cloth end of sintering machine to the delivery end of sintering machine with setting speed, when trolley is run to the surface of each bellows, detect the oxygen content in the flue gas below the grid section of the bellows upper end trolley, the oxygen content in the bellows bottom flue gas is detected simultaneously, and then the air leak rate of air curtain of each bellows is calculated.The automatic management level for improving sintering machine air-leakage control, timely feedbacks air leak rate of air curtain information in sintering process, solves the problems such as sintering operational efficiency is low, and equipment energy consumption is big to a certain extent.
Description
Technical field
The present invention relates to steel plant's iron making and sintering technical field, especially a kind of online prison applied to air leakage rate of sintering machine
Examining system and method.
Background technique
My down draft sintering technique is the main method of current iron mineral powder agglomeration, is widely used in metallurgy industry.Sintering process
In, due to factors such as design of sinter machine, equipment attrition agings, sintering machine system is caused to leak out, thus reduce sintering machine yield and
Sinter quality.Statistics indicate that foreign countries' air leakage rate of sintering machine some has had been reduced to 30% hereinafter, and domestic manufacturer at present
Mostly in 45%-60%, external some sintering plants facts have proved air leak rate of air curtain: air leakage rate of sintering machine is every to reduce 10%, sinter
6% can be increased production, sinter per ton can reduce power consumption 2kW/h, reduce the use of coke powder l kg/t, and iron ore yield rate improves 1.5%
~2.0%.Air leak rate of air curtain on-line monitoring is carried out to the air leak rate of air curtain at the sintering machine leakage main wind position of system, for the portion for aggravation of leaking out
Position, performs overhauling and maintenance or replaces to equipment in time, and the energy consumption of sintering process can be effectively reduced, and saves production cost,
Sinter quality is improved, productivity effect is increased.
Existing sintering machine air leak test is substantially at manual work stages, can not timely feed back air leak rate of air curtain information, when
Air leakage parts leak out when aggravating, and system, which can not be made, timely reacts, and influences the quality and yield of sinter.Mainly it is reflected in:
Lack comprehensive parameter measurement means, the analytical judgment of system can not be carried out to operating condition, sintering machine system fails best
It is run under operating condition；The energy consumption of main exhauster is high, and energy consumption analysis data are not complete, it is difficult to realize quantitative management.
Summary of the invention
In order to solve the technical problems existing in the prior art, it is applied to sintering machine the object of the present invention is to provide one kind and leaks
The on-line monitoring system and method for wind rate.The on-line monitoring system and method realize the on-line monitoring of air leakage rate of sintering machine, collection
Parameter monitoring, report generation, managing power consumption analysis and operation and maintenance guarantee sintering machine system to leak out extremely and send out in time in one
Now, it quick and precisely handles, improves the operational efficiency of sintering machine system.
In order to solve the above technical problems, the technical solution of the present invention is as follows:
A kind of on-line monitoring system applied to air leakage rate of sintering machine, including trolley, several sintering machine wind boxes, trolley oxygen
Content detection device, several bellows oxygen level sensors and close switch, wherein several described sintering machine wind boxes are side by side
Setting, upper surface form the operation plane of the trolley, the quantity of the bellows oxygen level sensor and sintering machine wind box
Quantity is equal, and the bottom of each sintering machine wind box is provided with a bellows oxygen level sensor；
Trolley oxygen content detector, trolley oxygen content detector packet are provided with below the bottom grid section of the trolley
Main casing, cylinder, oxygen level sensor and oxygen level sensor shell are included, the main casing includes protection shell and detection shell
Body, the protection shell is fixedly connected with detection shell, and is communicated, and the cylinder is fixed on the separate detection shell of protection shell
One end of body opens up through-hole on oxygen level sensor shell, and oxygen level sensor is placed in oxygen content shell, and oxygen content
One end of sensor housing is connect with cylinder, and the other end is provided with cover board, and the lid of cover board closes area and is greater than protection shell and detection
Connection area between shell, cylinder drive oxygen content shell to move between protection shell and detection shell；The detection shell
At least one side of body is installed by track activity, which is connect by driving lever with the cover board；
The side that sintering pallet is set to close to switch, the detected body close to switch are set on trolley.
Several sintering machine wind boxes are arranged side by side, and trolley carries out cloth from the sintering device handpiece position of an end, then
It is moved to opposite, realizes that Iron Ore Powder may be implemented in the sintering of Iron Ore Powder, the successively movement of more trolleys during the motion
High efficiency sintering.Trolley passes through sealed set between sealing structure and sintering machine wind box, to prevent leaking out for sintering machine, influences
It is sintered efficiency.In sintering process, due to factors such as design of sinter machine, equipment attrition agings, sintering machine system is caused to leak out.
Oxygen level sensor is set below trolley grid section, is also equipped with oxygen level sensor in the bottom of each bellows, is burnt
Trolley is moved forward during knot with setting speed, successively acquires the oxygen content data under the trolley grid section above each bellows.
Cooperate close to switching with detected body, trolley can be positioned, each bellows correspond to a close switch, close to open
The top for being mounted on bellows is closed, system uses the position that trolley is obtained close to switch, in trolley by right above each bellows
When, the corresponding two groups of oxygen content data of this bellows of system acquisition are completed to detect the air leak rate of air curtain of this bellows.Improve sintering machine
The automatic management level of air-leakage control, timely feedbacks air leak rate of air curtain information in sintering process, solves sintering fortune to a certain extent
The problems such as line efficiency is low, and equipment energy consumption is big.
Agglomeration for iron mine generates a large amount of heat and polluted gas, and gas flow rate is fast, for the oxygen for avoiding oxygen level sensor
Change zirconium probe by high temperature pollution gas erosion, the oxygen level sensor of installation on the car is utilized into trolley oxygen content detection dress
It sets and protects.
Preferably, the protection shell is hollow columnar structures, and the oxygen content shell is hollow columnar structures.
Preferably, the trolley oxygen content detector further includes fixed device, one end of fixed device and the protection
The end of shell connects, and the detected body is arranged in the other end.
When detecting that detected body is located at bellows surface close to switch, the also just position of oxygen content detector at this time
In the surface of bellows, to guarantee the accuracy of testing result.
Preferably, two side walls opposite on the vertical direction of the detection shell are movably arranged on detection shell, this
Two sides pass through shift plate and connect with the cover board.
When needing to take gas, it is mobile towards protection shell that cylinder drives oxygen level sensor shell, and then passes through shift plate band
Two side walls on the vertical direction of dynamic detection shell are mobile towards protection shell, and then open detection shell, make sintering flue gas
Into after the completion of sampling, it is mobile towards detection shell that cylinder drives oxygen level sensor shell, while driving detection shell
Side wall replys movement, will test housing seal, and is exposed to oxygen level sensor in sampling flue gas, to the oxygen in flue gas
Content is detected.
Preferably, the bellows oxygen level sensor is fixed on the side wall of bellows by flange.
Preferably, the on-line monitoring system further includes sintering machine large flue and exhaust fan, sintering machine large flue and each
The lower part of bellows is connected to, the downstream connection of exhaust fan and sintering machine large flue.
Main exhauster can extract iron ore powder sintering flue gas by bellows out, and leaking out for sintering process makes the energy of main exhauster
Source utilization rate reduces, and sintering energy consumption increases, the decline of sinter quality yield.
Preferably, the bellows oxygen level sensor is zirconium oxide oxygen level sensor, and detected gas temperature highest can
Up to 1300 DEG C, measurement range 0.1%-25% oxygen.
A kind of on-line monitoring method applied to air leakage rate of sintering machine, includes the following steps:
In sintering process, trolley is moved with setting speed from the cloth end of sintering device handpiece to the delivery end of rear of sintering machine
Dynamic, when trolley is run to the surface of each bellows, the oxygen detected in the flue gas below the grid section of the bellows upper end trolley contains
Amount, while the oxygen content in the bellows bottom flue gas is detected, and then the air leak rate of air curtain of each bellows is calculated.
Preferably, the calculation formula of the bellows air leak rate of air curtain are as follows:
Wherein, V1For volumetric flow of gas under fire grate, m3/min；V2For system air leakage
Volumetric flow of gas, m3/min；(V1+V2) it is strong wind lower box part volumetric flow of gas, m3/min；O2For fire grate lower bellows gas
Middle oxygen content, %；21% is oxygen content in leaked-in air, %；O2' it is oxygen content in flue upper bellows gas, %.
Preferably, the speed of service of trolley is 1m/min.
The beneficial effects of the present invention are:
The present invention improves the automatic management level of sintering machine air-leakage control, timely feedbacks air leak rate of air curtain in sintering process and believes
Breath solves the problems such as sintering operational efficiency is low, and equipment energy consumption is big to a certain extent.The invention patent collection parameter monitoring, report
Generation, managing power consumption analysis and operation and maintenance realize the on-line monitoring of air leakage rate of sintering machine, guarantee sintering machine system in one
System leaks out, and exception is timely to be found, quick and precisely handles, and improves the operational efficiency of sintering machine system.Sintering machine leakage is given simultaneously
The solution that gas erosion zirconia sensor is prevented in wind monitoring, devises effective safeguard structure, zirconium oxide is avoided to pass
The damage of sensor.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the conceptual schematic drawing of the Air Leaking Monitoring System of the invention patent；
Fig. 2 is the detection principle diagram of the Air Leaking Monitoring System of the invention patent；
Fig. 3 is the sensor connection configuration diagram of the Air Leaking Monitoring System of the invention patent；
Fig. 4 is the system flow chart of the Air Leaking Monitoring System of the invention patent；
Fig. 5 is the perspective view of the trolley assembly of the invention patent；
Fig. 6 is the left view of the trolley installation oxygen content detector schematic diagram of the invention patent；
Fig. 7 is the front view of the trolley installation oxygen content detector schematic diagram of the invention patent；
Fig. 8 is the schematic diagram of the bellows installation oxygen content detector of the invention patent；
Fig. 9 is the stereogram exploded view (one) of the oxygen content detector of the trolley installation of the invention patent；
Figure 10 is the stereogram exploded view (two) of the oxygen content detector of the trolley installation of the invention patent；
Figure 11 is the cross-sectional view of the oxygen content detector of the trolley installation of the invention patent；
Figure 12 is that the oxygen content detector of the trolley installation of the invention patent takes gas schematic diagram；
Figure 13 is the oxygen content detector detection schematic diagram of the trolley installation of the invention patent；
Wherein, 1. trolley, 2. trolley oxygen content detectors, 3. sintering machine wind boxes, 4. bellows oxygen level sensors, 5. burn
Knot machine large flue, 6. unloading valves, 7. exhaust fans, 8. flow of flue gas directions, 9. air leakage rate of sintering machine detector segments, 11. trolley vehicles
Wheel, 12. grid sections, 13. trolley breast plates, 14. flanges, 15. trolley bodies, 21. detected bodys, 22. fixed devices, 23. main casings,
24. cylinder, 25. oxygen level sensor shells, 26. oxygen level sensors, 27. take air bound plate, 28. main casing cover boards, 31. wind
Tank wall ring flange, 32. bellows walls.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has logical with the application person of an ordinary skill in the technical field
The identical meanings understood.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular shape
Formula be also intended to include plural form, additionally, it should be understood that, when in the present specification use term "comprising" and/or
When " comprising ", existing characteristics, step, operation, device, component and/or their combination are indicated.
The principle of air leakage rate of sintering machine on-line monitoring method is using under oxygen level sensor online acquisition sintering machine fire grate
With the oxygen content data of bellows lower part, data are transported to computer, data are handled by designed software, it will
Collected oxygen content is converted into air leak rate of air curtain, real-time air leak rate of air curtain data is shown on system interface, according to the leakage of every group of bellows
Wind rate tag system judges, once the air leak rate of air curtain data of some bellows exceed corresponding range, then system issues report
Alert signal, notifies administrator in time, so that staff takes the measure of pointedly reduction air leak rate of air curtain.
The design scheme of on-line monitoring method is as shown in Figure 1, in order to realize 15 bellows air leak rate of air curtain progress to sintering machine
On-line monitoring, needs to acquire two groups of oxygen content data of each bellows position, be respectively oxygen content under the grid section of bellows top and
The oxygen content of bellows lower part.System acquires oxygen content data, oxygen level sensor 1-15 by 16 oxygen level sensors thus
It is fixedly mounted on bellows lower part, oxygen level sensor 16 is mounted on mobile trolley, and trolley is in sintering process with 1m/min's
Speed moves forward, successively acquires the oxygen content data under the trolley grid section above 15 bellows.Since sensor 16 follows platform
Vehicle operating, so needing to position this trolley, system uses the position that trolley is obtained close to switch, passes through in sensor 16
When crossing right above each bellows, the corresponding two groups of oxygen content data of this bellows of system acquisition are completed to examine the air leak rate of air curtain of this bellows
It surveys.Trolley moves forward when operating, and system successively detects the air leak rate of air curtain data of 15 bellows, defines trolley fortune and circles as week
Phase T, then system completes the one-shot measurement to each bellows air leak rate of air curtain in T time.
(1) measuring principle: oxygen content method.As shown in Fig. 2, the testing principle of air leakage rate of sintering machine on-line monitoring system uses
Oxygen equilibrium method is measured and analyzes, as shown in Figure 1.Its principle assumes that bellows system without leaking out, then enters bellows system
Exhaust gas oxygen amount-grid section under exhaust gas amount of oxygen, equal to the exhaust gas oxygen amount-bellows lower part exhaust gas oxygen for system of leaving
Amount.Due to the presence of system air leakage, the exhaust gas into system is mixed into a certain amount of air, thus into system oxygen content with
Variation, thus can establish system oxygen content equilibrium equation (1).
System oxygen content equilibrium equation:
V1×O2%+V2× 21%=(V1+V2)×O2' % (1)
In above formula, V1For volumetric flow of gas under fire grate, m3/min；V2For system air leakage volumetric flow of gas, m3/min；
(V1+V2) it is strong wind lower box part volumetric flow of gas, m3/min；O2For oxygen content in fire grate lower bellows gas, %；21% is
Oxygen content in leaked-in air, %；O2' it is oxygen content in flue upper bellows gas, %.
By (1) formula it can be concluded that system air leakage volumetric flow of gas:
System air leakage rate:
(2) sensor: zirconium oxide oxygen content analyzer.To obtain the oxygen content data in sintering flue gas, system is selected
Zirconium oxide oxygen content analyzer can carry out oxygen content generated in combustion process as data collection terminal, the instrument
Quickly, it correctly analyzes, it is practical reliable.Analyzer is made of zirconia probe and oxygen content transducer.Zirconia probe is insertion
The installation of formula flange, oxygen content transducer are 0-20.6% by RS485 interface output signal, corresponding detectable oxygen content range,
Detected flue-gas temperature reaches as high as 1300 DEG C.
(3) locating device of loop wheel machine: close to switch.System oxygen level sensor is needed in oxygen content data under acquiring grid section
Whether sensor is located at right above bellows and be judged, be the ideal chose suitable for this close to switch.Work as metal detection
Body is close to the induction region of switch, and switch can contactlessly issue rapidly electrical command, make switch motion, thus to calculating
Machine (PLC) device provides control instruction, and energy accurate response goes out the position of movement mechanism, reliable in action, and performance is stablized, and frequency is rung
It should be fast.For the environment for adapting to sintering machine production trolley operating, system selects inductive type close to switch, the work of the close switch
Voltage is 15-30V, and detecting distance 2-20mm, the analog signal of output is 4-20mA, and the mode of connection is terminal connection, is had
The characteristics such as surge, short circuit, reversed polarity and overload protection.
(4) design of data acquisition module: in view of monitoring system needs and single-chip microcontroller the characteristics of, Selection utilization insertion
Formula SCM system carries out the data acquisition of oxygen content.The connection type of oxygen level sensor and data acquisition board selection such as Fig. 3
It is shown.In sintering production process, the position of sintering machine wind box is fixed, the sensor distance workshop of bellows lower part
Office is about 60m, to carry out data acquisition to 15 oxygen level sensors of bellows lower part, can be selected can be in remote item
Under part and under environment that electronic noise is big can effectively transmitted signal RS485 bus；And sintering pallet is in operating always
State, therefore oxygen level sensor 16 is not available the connection of RS485 bus, to realize that wireless transmission, on-line monitoring system selection make
Sensor 16 is connect with data acquisition board with WIFI module.
(4) mounting means of sensor: the scheme of installation of oxygen level sensor is as shown in Figure 5 and Figure 6 on trolley, trolley
1 includes four bogie wheels 11, and bogie wheels are evenly distributed on the two sides of 15 bottom of trolley body, and the bottom of trolley body 15 is to comb
Item 12, grid section 12 carry out down draft sintering, trolley breast plate 13 is arranged in the two sides of trolley body 15, for placing for placing Iron Ore Powder
Iron Ore Powder is fallen.
In the oxygen content under acquiring 1 fire grate of sintering pallet in flue gas, in order to dispose oxygen level sensor, need platform
Hole milling and welded flange dish structure on car body 15.Trolley oxygen level sensor is fixed on the car by ring flange, sensor
Metal end is the detection body close to switch, and the top of 15 bellows is mounted on close to the sensing device of switch, connects AD conversion
Device, converter are connected using RS485 bus with data acquisition board expansion board.When the trolley of fixed oxygen level sensor passes through wind
When the surface of case, system starts to acquire the oxygen content data of corresponding bellows.Oxygen level sensor scheme of installation on bellows
As shown in figure 8, oxygen level sensor is mounted on bellows also through ring flange.
(5) workflow of the field monitoring part of system in a cycle T is monitored, as shown in Figure 4: system boot
Afterwards, the initialization for carrying out system first is approached when the trolley of fixed oxygen level sensor 16 is run to right above No. 1 bellows
Switch response, system starts acquire two groups of numbers of oxygen content and bellows lower part oxygen content under the corresponding grid section of lower No. 1 bellows
According to obtain the air leak rate of air curtain data of No. 1 bellows, if air leak rate of air curtain size is more than set range, system alarm is mentioned
Show that staff operates, simultaneity factor continues waiting for responding close to switch for next bellows, into leaking out for next bellows
Rate detection, until the last one bellows is completed in detection, then system completes the primary survey in a cycle to each bellows air leak rate of air curtain
Amount.
(6) as shown in figure 8, bellows oxygen level sensor 4 is fixed on bellows wall 32 by bellows wall ring flange.
The lower section of the bottom grid section 12 of the trolley 1 is provided with trolley oxygen content detector 2, trolley oxygen content detection dress
Setting 2 includes main casing 23, cylinder 24, oxygen level sensor 26 and oxygen level sensor shell 25, and the main casing 23 includes
Shell and detection shell are protected, the protection shell is fixedly connected with detection shell, and is communicated, and the cylinder 24 is fixed on guarantor
One end of the separate detection shell of protective case body opens up through-hole on oxygen level sensor shell 25, and oxygen level sensor 26 is placed in
In oxygen level sensor shell 25, and one end of oxygen level sensor shell 25 is connect with cylinder 24, and the other end is provided with lid
Plate, the lid of cover board close area and are greater than protection shell and detect the connection area between shell, and cylinder drives oxygen content shell protecting
It is moved between protective case body and detection shell；At least one side wall (taking air bound plate 27) of the detection shell passes through track activity
Installation, the side are connect by driving lever with the cover board.The main casing cover board 28 is arranged in the end for detecting shell.Protective shell
Body is hollow columnar structures, and the oxygen content shell is hollow columnar structures.As shown in fig. 7, trolley oxygen content detector 2
It further include fixed device 22, one end of fixed device 22 is connect with the end of the protection shell, and other end setting is described tested
Survey body 21.
Detect trolley grid section lower part oxygen content when, need for oxygen level sensor to be mounted on trolley body, at this time because
A large amount of heat and polluted gas are generated for agglomeration for iron mine, and gas flow rate is fast, to avoid the zirconium oxide of oxygen level sensor from visiting
Head is protected by high temperature pollution gas erosion, by the oxygen level sensor of installation on the car using trolley oxygen content detector
Get up, as described and depicted in figs. 9-13, which is divided into two states for oxygen content detection process, is to take gaseity such as Figure 12 respectively
With the detecting state of Figure 13.The movement for taking gas shell is realized using cylinder, simultaneous oxidation zirconium sensor passes through zirconia sensor
Shell is connected with gas shell is taken.When taking gaseity, zirconia sensor is retracted in detection device main casing with cylinder, this
When from gas erosion.It when needing to acquire oxygen content information, is driven with cylinder, while gas shell being taken to move therewith, when taking
When gas shell just covers main casing, the gas collecting detected needed for completing forms confined space, at this time zirconia sensor
Just avoids by gas erosion and damage while acquiring oxygen content in the centre of confined space.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any
Modification, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (10)
1. a kind of on-line monitoring system applied to air leakage rate of sintering machine, it is characterised in that: including trolley, several sintering machine wind
Case, trolley oxygen content detector, several bellows oxygen level sensors and close switch, wherein several described sintering machines
Bellows are arranged side by side, and upper surface forms the operation plane of the trolley, the quantity and sintering of the bellows oxygen level sensor
The quantity of machine bellows is equal, and the bottom of each sintering machine wind box is provided with a bellows oxygen level sensor；
Trolley oxygen content detector is provided with below the bottom grid section of the trolley, trolley oxygen content detector includes master
Shell, cylinder, oxygen level sensor and oxygen level sensor shell, the main casing include protection shell and detection shell, institute
It states protection shell to be fixedly connected with detection shell, and communicates, the cylinder is fixed on the one of the separate detection shell of protection shell
It holds, opens up through-hole on oxygen level sensor shell, oxygen level sensor is placed in oxygen content shell, and oxygen level sensor shell
One end of body is connect with cylinder, and the other end is provided with cover board, and the lid of cover board closes area and is greater than between protection shell and detection shell
Connection area, cylinder drive oxygen content shell protection shell and detection shell between move；The detection shell is at least
One side is installed by track activity, which is connect by driving lever with the cover board；
Described to be set on the side wall of sintering machine close to switch, the detected body close to switch is set on trolley.
2. the on-line monitoring system according to claim 1, it is characterised in that: the protection shell is hollow columnar structures, institute
Stating oxygen content shell is hollow columnar structures.
3. the on-line monitoring system according to claim 1, it is characterised in that: the trolley oxygen content detector further includes solid
Determine device, one end of fixed device is connect with the end of the protection shell, and the detected body is arranged in the other end.
4. the on-line monitoring system according to claim 1, it is characterised in that: opposite on the vertical direction of the detection shell
Two side walls are movably arranged on detection shell, the two sides pass through shift plate and connect with the cover board.
5. the on-line monitoring system according to claim 1, it is characterised in that: the bellows oxygen level sensor is solid by flange
It is scheduled on the side wall of bellows.
6. the on-line monitoring system according to claim 1, it is characterised in that: the on-line monitoring system further includes that sintering machine is big
Flue and exhaust fan, sintering machine large flue are connected to the lower part of each bellows, the downstream connection of exhaust fan and sintering machine large flue.
7. the on-line monitoring system according to claim 1, it is characterised in that: the bellows oxygen level sensor is zirconium oxide oxygen
Content level sensor.
8. a kind of on-line monitoring method applied to air leakage rate of sintering machine, characterized by the following steps:
In sintering process, trolley is mobile from the cloth end of sintering machine to the delivery end of sintering machine with setting speed, when trolley is run
When to the surface of each bellows, the oxygen content in the flue gas below the grid section of the bellows upper end trolley is detected, while detecting should
Oxygen content in the flue gas of bellows bottom, and then the air leak rate of air curtain of each bellows is calculated.
9. on-line monitoring method according to claim 8, it is characterised in that: the calculation formula of the bellows air leak rate of air curtain are as follows:
Wherein, V1For volumetric flow of gas under fire grate, m3/min；V2For system air leakage gas
Volume flow, m3/min；(V1+V2) it is strong wind lower box part volumetric flow of gas, m3/min；O2For oxygen in fire grate lower bellows gas
Content, %；21% is oxygen content in leaked-in air, %；O2' it is oxygen content in flue upper bellows gas, %.
10. on-line monitoring method according to claim 8, the speed of service of trolley is 1m/min.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562061A (en) * | 2020-04-30 | 2020-08-21 | 北京科技大学 | Method for testing air leakage rate of iron ore sintering machine system |
| CN112050645A (en) * | 2020-09-14 | 2020-12-08 | 东北大学 | Scanning type air leakage monitoring device and installation method thereof |
| CN113091460A (en) * | 2021-04-23 | 2021-07-09 | 张家港宏昌钢板有限公司 | Sintering machine waste heat monitoring and adjusting method |
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2018
- 2018-12-29 CN CN201811645510.9A patent/CN109520682A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562061A (en) * | 2020-04-30 | 2020-08-21 | 北京科技大学 | Method for testing air leakage rate of iron ore sintering machine system |
| CN112050645A (en) * | 2020-09-14 | 2020-12-08 | 东北大学 | Scanning type air leakage monitoring device and installation method thereof |
| CN113091460A (en) * | 2021-04-23 | 2021-07-09 | 张家港宏昌钢板有限公司 | Sintering machine waste heat monitoring and adjusting method |
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