CN103411995A - Experimental facility and method for researching formation and disappearance and discharge of gaseous pollutant in sintering process - Google Patents
Experimental facility and method for researching formation and disappearance and discharge of gaseous pollutant in sintering process Download PDFInfo
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- CN103411995A CN103411995A CN2013102794379A CN201310279437A CN103411995A CN 103411995 A CN103411995 A CN 103411995A CN 2013102794379 A CN2013102794379 A CN 2013102794379A CN 201310279437 A CN201310279437 A CN 201310279437A CN 103411995 A CN103411995 A CN 103411995A
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Abstract
The invention discloses an experimental facility and method for researching formation and disappearance and discharge of a gaseous pollutant in a sintering process. The experimental facility comprises a sintering system, a ventilation system and a measurement system, wherein the sintering system also comprises a cup body and a negative pressure device; three temperature measurement holes and three gas sampling holes are evenly distributed along the wall of the cup body in a longitudinal direction; one temperature measurement hole, a ventilating hole and an air pressure measurement hole are arranged on the negative pressure device; and one gas sampling hole is also arranged in front of the ventilation system. By adopting the experimental facility and the experimental method, flue gas compositions of different sinter beds and the relation between the flue gas compositions and the sintering temperature can be measured on line in real time through the temperature measurement holes and the gas sampling holes formed in the cup body in a simulated sintering process of a sintering pot; chemical reactions at different sinter beds can be researched by changing the sintering material compositions and the sintering condition; and the formation and disappearance and discharge mechanisms of the pollutant are analyzed.
Description
Technical field
The present invention relates to a kind of experimental provision and experimental technique that the sintering process gas pollutant is given birth to the slake discharge of studying.
Background technology
Steel and iron industry is the mainstay industry of Chinese national economy, for significant contribution has been made in propelling and the development of China's industrialization and urbanization.But China's steel and iron industry Environmental Protection Level is also lower simultaneously, the specific yield pollutant discharge amount is higher, at present iron and steel is the Air Pollutant Emission industry that is only second to thermoelectricity, and total blowdown flow rate occupies second, and the atmosphere pollution produced in sintering process accounts for over half in whole steelmaking process.Therefore study the iron and steel sintering process pollutant life mechanism that disappears, analyze the pollutant emission feature, to the control of steel industry atmospheric pollution, effectively reduce steel industry Air Pollutants Emissions tool and be of great significance
The apparatus and method of at present research iron and steel sintering process gaseous contamination deposits yields mainly contain two kinds of tubular furnace experiment and sintering cup tests.The tubular furnace test method is used horizontal or vertical tubular furnace, sinter mixture is put into to kiln roasting, by changing the factors such as heating-up temperature, heat time heating time, atmospheric condition and compound composition, study sintering sintering feed surface atmosphere or efflux pollutant kind and the concentration thereof in atmosphere.In the actual sintered process, sinter mixture is respectively sintering ore bed, burning zone, preliminary heating zone, drying layer and excessive moistening layer from top to bottom.Correspondingly, help while burning air and sintering gas from top to bottom by these bed of materials, go through successively that gas pollutant generates, is adsorbed, desorb and the process such as efflux, there is significant difference in the flue gas composition of different sinter beds, and this is that tubular furnace can not be simulated.Sintering cup test refers to that the sintered cup device or the similar device that utilize industrial sintering experiment chamber carry out sintering research, is mainly used in investigating the impact of each factor on the sintering feed performance, also can be used for studying the concentration of each component in the outer exhaust of sintering.Due to the unicity of measuring position, the sintering cup test tails assay can only be studied the emission behaviour of understanding pollutant on the whole, the life that can not resolve the sintering process pollutant mechanism that disappears.
Summary of the invention
The present invention aims to provide a kind of experimental provision and experimental technique of can modeling effort sintering process gas pollutant giving birth to the slake discharge, with the sintering cup test that can only obtain the emission pollutant levels, compare, this experimental provision and experimental technique can not only obtain emission pollutant levels data, can also be used to studying the sintering process gas pollutant life mechanism that disappears, thereby have more practicality, intuitive and comprehensive.
Technical scheme of the present invention is as follows:
At first the present invention provides a kind of experimental provision, and described experimental provision is comprised of three parts, is respectively sintered cup system, exhausting system and measuring system.
The sintered cup system is comprised of heat-resistance stainless steel cup and stainless steel negative pressure device, and both connect by mounting flange, and wherein upper flange is welded on the lower surface of cup in the sintered cup system, and lower flange is welded on the upper surface of negative pressure device.Negative pressure device has docking recess on upper surface, is used for being connected and fixed bottom of cup, and places grate plate support sintering feed.Between described cup and negative pressure device, seal with asbestos pad.Cup outer wall parcel ceramic fiber aluminium silicate wool insulation, outermost layer is used the steel wire reinforcement ceramic fiber cloth to wrap.Along vertical uniform three the temperature survey holes of cup sidewall and three gas sampling holes, in negative pressure device, arrange again an exhausting hole, a temperature survey hole and a barometric surveying hole.
Exhausting system is comprised of pipeline, blower fan and dedusting de-watering apparatus, between blower fan and negative pressure device suction opeing, adopt pipeline to be connected, on blower fan and pipeline that negative pressure device is connected, be furnished with in turn dedusting de-watering apparatus, blowdown valve, flowmeter and a gas sampling hole, on negative pressure device, be furnished with one be used to measuring the tensimeter of suction pressure.
Measuring system is comprised of thermopair, small-sized aspiration pump, dedusting heat sink and flue gas analyzer.Thermopair uses 310S stainless steel protection cover, directly inserts in the temperature survey hole, with the high-temp glue sealing, connects digital display instrument.Flue gas through dedusting heat sink and small-sized aspiration pump, then is sent into respectively four flue gas analyzers, to detect the concentration of each component in each sinter bed and discharged gas fume after from four gas sampling holes, extracting out.
A kind of experimental technique that adopts research sintering process gas pollutant to give birth to the experimental provision of slake discharge, comprise the steps:
A) cup sealing is fixed on negative pressure device, bedding and padding and sintering feed are packed in cup.
B) use the benzine blow lamp igniting, control the igniting suction pressure, and start to detect in each electric thermo-couple temperature and flue gas analyzer each concentration of component over time.
C) igniting improves suction pressure after finishing.
D) in the negative pressure device temperature, peak and turn back while reducing by 50 ℃, finish the sintering simulated experiment.
E) cooling rear discharging.
Under the prerequisite that keeps the sintering feed quality, by changing the parameters such as sintering process parameter and sinter mixture component, can study the chemical reaction that the sintering process Different layer of the compost occurs, resolve the sintering process gas pollutant and give birth to the slake emission mechanism.
Advantage of the present invention is: can detect the flue gas composition concentration of sintering process synchronization diverse location and over time.Therefore, can analyze the chemical reaction that different sintering belts occur, thereby resolve pollutant life disappear mechanism and discharge characteristics comprehensively, compare with the technique device of existing research sinter fume pollutant, have more practicality, accuracy, intuitive and comprehensive.
The accompanying drawing explanation
Fig. 1 is that experimental provision structure of the present invention forms schematic diagram;
Fig. 2 is sintered cup system schematic of the present invention;
Fig. 3 is sintered cup cup cut-open view of the present invention;
Fig. 4 is sintered cup negative pressure device cut-open view of the present invention;
Fig. 5 is sintered cup grate plate schematic diagram of the present invention.
In figure:
1, cup 2, flue gas analyzer 3, thermopair 4, thermal insulation separation thermosphere 5, dedusting heat sink 6, small-sized aspiration pump 7, mounting flange 8, negative pressure device 9, tensimeter 10, blowdown valve 11, flowmeter 12, blower fan 13, benzine blow lamp 14, docking recess 15, temperature survey hole 16, gas sampling hole 17, upper flange 18, lower flange 19, barometric surveying hole 20, exhausting hole 21, grate plate 22, dedusting de-watering apparatus
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
At first the present invention provides a kind of experimental provision that the sintering process gas pollutant is given birth to the slake discharge of studying, and described experimental provision is comprised of three parts, is respectively sintered cup system, exhausting system and measuring system.
As shown in Figure 1, the sintered cup system is comprised of heat-resistance stainless steel cup 1 and stainless steel negative pressure device 8, as shown in Figure 3, described cup 1 is drum, on cup 1 sidewall, be vertically arranged with three measurement points, each measurement point comprises a temperature survey hole 15 and a gas sampling hole 16, and the temperature survey hole 15 of described measurement point is identical with the height in gas sampling hole 16.On described negative pressure device 8, be provided with an exhausting hole 20, temperature survey hole 15 and a barometric surveying hole 19, described exhausting hole 20 connects the blower fan 12 in exhausting system by pipeline, Bonding pressure table 9 on described barometric surveying hole 19, be used to measuring the suction pressure in negative pressure device 8.Between described cup 1 and negative pressure device 8, be connected by mounting flange 7.
Exhausting system is comprised of pipeline, blower fan 12 and dedusting de-watering apparatus 22, the air inlet of blower fan 12 connects the exhausting hole 20 of negative pressure device 8 by pipeline, and dedusting de-watering apparatus 22, gas bleed valve 10, flowmeter 11 and the 4th gas sampling hole 16 are housed in turn on described pipeline.The air outlet of blower fan 12 directly with air, be connected carry out emptying.
Measuring system is comprised of thermopair 3, small-sized aspiration pump 6, dedusting heat sink 5 and flue gas analyzer 2.Thermopair 3 one ends are connected to temperature survey hole 15, and the other end connects digital display instrument; Dedusting heat sink 5 and small-sized aspiration pump 6 are connected to respectively on the pipeline between three gas sampling holes 16 and three flue gas analyzers 2 in turn.Described thermopair 3 uses 310S stainless steel protection cover, and one four, directly insert in four temperature survey holes 15 respectively, with high-temp glue, seal.Small-sized aspiration pump 6 and dedusting heat sink 5 each three, be connected between three the gas sampling holes and three flue gas analyzers on cup 1 sidewall.The 4th the gas sampling hole 16 arranged on the pipeline between described blower fan 12 and negative pressure device 8, between the 4th gas sampling hole 16 and the 4th flue gas analyzer 2, only be provided with small-sized aspiration pump 6, and without dedusting heat sink 5 is set, to detect the concentration of each component in each sinter bed and discharged gas fume.
As shown in Figure 2, described mounting flange 7 comprises upper flange 17 and lower flange 18, and wherein upper flange 17 is welded on the lower surface of cup 1 in the sintered cup system, and lower flange 18 is welded on the upper surface of negative pressure device 8.Negative pressure device has docking recess 14 on 8 upper surfaces, as Fig. 4, docking recess 14 is coaxial with the endoporus of negative pressure device 8, and the internal diameter of docking recess 14 is greater than the internal orifice dimension of negative pressure device 8, the general external diameter that also is greater than cup 1, be convenient to the mechanical connection between cup 1 and negative pressure device 8 like this.On described docking recess 14, place grate plate 21 and be used for support bedding and padding and sintering feed.Between described cup 1 and negative pressure device 8, seal with asbestos washer.Cup 1 outer wall has thermal insulation separation thermosphere 4, and described thermal insulation separation thermosphere 4 refers to that the ceramic fiber aluminium silicate wool that is wrapped in cup 1 outer wall is for insulation, and outermost layer is used the steel wire reinforcement ceramic fiber cloth to wrap.Along vertical uniform three the temperature survey holes 15 of cup 1 sidewall and three gas sampling holes 16, as shown in Figure 2, on cup 1 sidewall, that a temperature survey hole 15 is corresponding to one group of measurement point one by one with a gas sampling hole 16, the temperature survey hole 15 in every group of measurement point is identical with the height in gas sampling hole 16.
Described grate plate 21 structures as shown in Figure 5, have the slab construction in grid or hole 211, and grid or hole 211 diameters are less than the bedding and padding size, guarantee that bedding and padding can not fall.Generally be preferably 6mm.
Below by embodiment, experimental technique provided by the invention is described.
Test the cup 1 internal diameter 100mm in sintered cup system used, external diameter 120mm, be highly 700mm.
Connect sintered cup system, exhausting system and measuring system, as shown in Figure 1, wherein the thermopair in measuring system 3 does not temporarily insert temperature survey hole 15, and the high-temp glue sealing is all used in the temperature survey hole 15 on cup and gas sampling hole 16.
As shown in Figure 2, grate plate 21 is placed in negative pressure device 8 and bottom of cup docking recess 14, grate plate 21 is all placed up and down asbestos washer and is sealed.Lower flange 18 upper surfaces are also placed the asbestos washer of corresponding size.Grate plate 21 surfaces that cup 1 bottom is placed in docking recess 14 are upper, and upper flange 17 and lower flange 18 are joined with bolts.
According to the charge ratio of experimental program, bedding and padding and the sintering feed that mixes are packed in cup 1.Thermopair 3 is inserted to temperature survey hole 15, seal by high-temp glue.Described bedding and padding are the material that sinters into after crushing and screening, particle diameter 6-10mm.
After high-temp glue was solidified, experimental provision connected complete, started experiment, was specially:
Benzine blow lamp 13 igniting, regulate benzine blow lamp and make flame powerful and stable.
Start exhausting blower fan 12, adjusting pressure release valve 10 makes negative pressure device 8 pressure be-8kpa, benzine blow lamp 13 is moved on to cup 1 top light a fire, the duration of ignition about 2min.In igniting time, start small-sized aspiration pump 6, and flue gas analyzer 2 starts to measure, and start to record on the digital display instrument be connected with thermopair 3 the temperature registration over time.
After cup 1 igniting finishes, remove benzine blow lamp 13, adjusting pressure release valve 10 make negative pressure device 8 pressure to-11kpa～-14kpa, sintering starts.Continue the flue gas composition concentration of four gas sampling points 16 of test, and record temperature over time.
After negative pressure device 8 temperature peaked, the sintering experiment after 50 ℃ that descends finished.
Wait for the cooling rear discharging of sintering feed.
The experimental data that experimental provision provided by the invention and experimental technique obtain by temperature measuring point and corresponding gasmetry point can be studied the different chemical reaction that in sintering process, each sintering belt occurs intuitively, and the migration and variation process of the Changeement analysis pollutant of flue gas composition concentration between can put by different measuring.Compare traditional sintered cup device and the experimental technique that can only investigate flue tail gas, this experimental provision and experimental technique, by researching and analysing the variation that changes different sintering belt flue gas compositions in the sintering process that sintering feed forms and process conditions cause, can more accurately more fully be studied the sintering process gas pollutant and give birth to the slake discharge.
Claims (7)
1. study the experimental provision that the sintering process gas pollutant is given birth to the slake discharge for one kind, it is characterized in that: formed by sintered cup system, exhausting system and three parts of measuring system; The sintered cup system is comprised of cup and negative pressure device, by mounting flange, connect, along the vertical uniform measurement point of cup, each measurement point comprises a temperature survey hole and a gas sampling hole, on negative pressure device, arranges a temperature survey hole, an exhausting hole and a barometric surveying hole; Exhausting system comprises pipeline, blower fan and dedusting de-watering apparatus, and blower and pipeline is connected with the exhausting hole of negative pressure device, on described pipeline, is furnished with in turn dedusting de-watering apparatus, blowdown valve, flowmeter and a gas sampling hole; Described blower fan other end outlet connects atmosphere; Measuring system comprises thermopair, small-sized aspiration pump, dedusting heat sink and flue gas analyzer, and described thermoelectricity is on a rare occasion held and is connected to described temperature survey hole, and the other end connects digital display instrument; Described dedusting heat sink and small-sized aspiration pump are connected on cup between gas sampling hole and flue gas analyzer.
2. a kind of experimental provision that gas pollutant in sintering process is given birth to the slake discharge of studying according to claim 1, it is characterized in that: the temperature survey hole of described measurement point and gas sampling hole are at equal height, and described thermopair uses 310S stainless steel protection cover; Between described cup and negative pressure device, asbestos washer is set, the high-temp glue sealing is all used in described temperature survey hole and gas sampling hole.
3. a kind of experimental provision that gas pollutant in sintering process is given birth to the slake discharge of studying according to claim 1, it is characterized in that: described mounting flange comprises upper flange and lower flange, described upper flange is fixed on bottom of cup, and lower flange is fixed on the negative pressure device upper surface.
4. a kind of experimental provision that gas pollutant in sintering process is given birth to the slake discharge of studying according to claim 1, it is characterized in that: described negative pressure device upper surface is provided with docking recess, described docking recess diameter is greater than the cup external diameter, coaxial with the negative pressure device endoporus; Grate plate is set in docking recess, on grate plate, arranges cup, be provided with up and down asbestos washer in described grate plate.
5. a kind of experimental provision of studying the living slake discharge of gas pollutant in sintering process according to claim 1, is characterized in that: Bonding pressure table on the barometric surveying hole of described negative pressure device.
6. a kind of experimental technique that gas pollutant in sintering process is given birth to the experimental provision of slake discharge of studying according to claim 1 is characterized in that:
A) cup and negative pressure device in the sintered cup system are fixed, in cup, inserted bedding and padding and sintering feed;
B) use the benzine blow lamp igniting, igniting suction pressure-8kpa, and start simultaneously to record each concentration of component in the temperature variation of each measurement point and flue gas;
C) igniting after finishing, improve suction pressure and be-11kpa～-14kpa;
D) in the negative pressure device temperature, peak, and the sintering experiment after 50 ℃ that descends finishes;
E) cooling rear discharging.
7. experimental technique according to claim 6, it is characterized in that: described bedding and padding are the material that sinters into after crushing and screening, particle diameter 6-10mm.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103983656A (en) * | 2014-05-12 | 2014-08-13 | 莱芜钢铁集团有限公司 | Hot-wind oxygen-rich experiment device utilizing sintering annular cooler |
| CN104198522A (en) * | 2014-09-15 | 2014-12-10 | 上海西重所重型机械成套有限公司 | On-line iron ore sintering test device and test method |
| CN105973503A (en) * | 2016-07-11 | 2016-09-28 | 同济大学 | Composite sampling tube for acquiring gas and measuring temperature for microwave heating device |
| CN110333326A (en) * | 2019-08-07 | 2019-10-15 | 马鞍山钢铁股份有限公司 | A kind of sintering circulating flue gas simulation system and experimental method |
| CN110441348A (en) * | 2019-08-15 | 2019-11-12 | 鞍山星源达科技有限公司 | A kind of method that agglomeration for iron mine simulation test suspends realization explication de texte by process |
| CN110702574A (en) * | 2019-09-30 | 2020-01-17 | 鞍钢股份有限公司 | Iron ore sintering cup simulation test system and method capable of detecting air permeability in layered mode |
| CN110793324A (en) * | 2019-09-30 | 2020-02-14 | 鞍钢股份有限公司 | Iron ore sintering cup simulation test system and method capable of realizing process temperature control |
| CN113567486A (en) * | 2021-07-26 | 2021-10-29 | 中南大学 | Sintering test method and system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983656A (en) * | 2014-05-12 | 2014-08-13 | 莱芜钢铁集团有限公司 | Hot-wind oxygen-rich experiment device utilizing sintering annular cooler |
| CN104198522A (en) * | 2014-09-15 | 2014-12-10 | 上海西重所重型机械成套有限公司 | On-line iron ore sintering test device and test method |
| CN104198522B (en) * | 2014-09-15 | 2016-08-24 | 上海西重所重型机械成套有限公司 | A kind of online sintering test method of iron ore |
| CN105973503A (en) * | 2016-07-11 | 2016-09-28 | 同济大学 | Composite sampling tube for acquiring gas and measuring temperature for microwave heating device |
| CN110333326A (en) * | 2019-08-07 | 2019-10-15 | 马鞍山钢铁股份有限公司 | A kind of sintering circulating flue gas simulation system and experimental method |
| CN110333326B (en) * | 2019-08-07 | 2024-04-16 | 马鞍山钢铁股份有限公司 | Sintering circulation flue gas simulation system and experimental method |
| CN110441348A (en) * | 2019-08-15 | 2019-11-12 | 鞍山星源达科技有限公司 | A kind of method that agglomeration for iron mine simulation test suspends realization explication de texte by process |
| CN110702574A (en) * | 2019-09-30 | 2020-01-17 | 鞍钢股份有限公司 | Iron ore sintering cup simulation test system and method capable of detecting air permeability in layered mode |
| CN110793324A (en) * | 2019-09-30 | 2020-02-14 | 鞍钢股份有限公司 | Iron ore sintering cup simulation test system and method capable of realizing process temperature control |
| CN113567486A (en) * | 2021-07-26 | 2021-10-29 | 中南大学 | Sintering test method and system |
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