CN104034371A - Method for measuring gas leakage rate of sintering machine system - Google Patents
Method for measuring gas leakage rate of sintering machine system Download PDFInfo
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- CN104034371A CN104034371A CN201410277391.1A CN201410277391A CN104034371A CN 104034371 A CN104034371 A CN 104034371A CN 201410277391 A CN201410277391 A CN 201410277391A CN 104034371 A CN104034371 A CN 104034371A
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Abstract
The invention discloses a method for the measuring gas leakage rate of a sintering machine system. The method is on the basis that N2 is not involved in the reaction in the sintering process and adopts N2 balance for gas leakage measurement. The method includes the steps of 1, extending the side plate of a sintering machine trolley upwardly, and guaranteeing a no-material space between the sintering material surface and the upper edge of the side plate of the sintering machine trolley; 2, measuring gas incoming speed of the sintering material layer on the sintering material, and measuring the flue gas velocity, the flue gas temperature, the flue gas pipeline nitrogen concentration and the flue gas pressure; 3, calculating the gas leakage rate according to the measured data by the formulas (img file = 'DDA0000523955380000011.TIF' wi = '75' he = '38' /) (img file = 'DDA0000523955380000012.TIF' wi = '752' he = '' / 136). The method has the advantages that the gas leakage rate of the sintering machine system can be measured simply and accurately, and disadvantages that an existing measuring technology is inconvenient to operate, errors are large, and only partial gas leakage rate can be measured by a gas leakage spot gas velocity measuring method are solved.
Description
Technical field
The invention belongs to sintering technology field, particularly, the present invention relates to a kind of method of measuring air-leaking rate of sinter machine system.
Background technology
It is the greatest factor of the current sintering energy consumption of impact and sintering output that sintering leaks out, and sintering air leak rate of air curtain is higher, and the effective wind of sintering is just fewer, and sintering power consumption increases.Sintering system is mainly to leak out from sintering machine head end, tail-hood plate, bellows interface chassis seam etc., causes reducing by sinter bed effective wind rate, causes power consumption waste and sintering cost to increase.Production scene is to the mensuration of sintering system air leak rate of air curtain some employing experimental formula and oxygen balance or CO at present
2the method of balance, due to complicated redox reaction, these methods all can not Accurate Determining air leak rate of air curtain.Although also some patent measuring technique, all there are various limitation in these patents.Although the disclosed a kind of sintering system air leakage rate measuring method of Chinese patent 200810236856.3 has been considered the impact of moisture content, its intake velocity value is with mean value, large with actual value error, and air leak rate of air curtain is calculated to impact greatly.This is the reason because of permeability of sintering material bed and edge effect, and it is moving larger that disturbance is crossed on sinter bed surface, only depends on to get to be a little averaging to obtain accurate intake.This patent is not considered the impact that the caused new gas of sintering process chemical reaction generates simultaneously, although this tittle is less, is one of result influence factor yet.
Summary of the invention
The object of the invention is to, a kind of method of measuring air-leaking rate of sinter machine system is provided, the method has solved that the measurement that prior art exists is inaccurate, error large and the problem such as operability is not strong.
For achieving the above object, the present invention is achieved by the following technical solutions:
A method of measuring air-leaking rate of sinter machine system, said method comprising the steps of:
1) sintering pallet side plate 1 is upwards prolonged to liter, edge on sinter bed 2 surfaces and sintering pallet side plate 1 is formed without material space, then above sinter bed 2, get point measurement sinter bed intake velocity V
before, then calculate as follows sinter bed intake Q
before:
Q
before=V
befores
before
In formula: V
before---sinter bed intake velocity;
S
before---the actual ventilative area of sinter bed;
2) take the margin and center point of cross-section radial of sinter fume pipeline 4 is measurement point, measures respectively after averaging and obtains flue-gas temperature T
after, flue gas pressures P
after, flue flue gas stream speed V
afterwith flue nitrogen gas concn N
after, calculate pipeline cross-sectional area S
after, then calculate as follows exhaust gas volumn Q
after:
Q
after=V
afters
after
In formula: V
after---flue flue gas stream speed;
S
after---flue cross-sectional area;
3) nitrogen conservation in sintering process:
0.79 (Q
before+ Q
leak)=Q
aftern
after
In formula: Q
leak---sintering machine inleakage;
By step 1)-2) formula and nitrogen conservation formula calculate
4) as follows by Q
afterbe converted into standard state Q
rear mark,
In formula: T
mark---atmospheric temperature under the status of criterion;
P
mark---atmospheric pressure under the status of criterion;
5) calculate as follows air leak rate of air curtain K,
Preferably, described step 1), sintering pallet side plate 1 is upwards prolonged to rise and be greater than 1/2 of sinter bed 2 height.
Preferably, two edges and middle three points along height on the pallet side plate 1 above sinter bed 2 are got point measurement and average, and are sinter bed intake velocity V
before.
The present invention upwards prolongs liter by pallet side plate height, sintering material layer thickness is constant, sinter bed top is formed without material space, when exhausting, without material space, just become air intake buffer strip, pallet side plate top intake velocity is respectively named a person for a particular job and is tending towards evenly, has solved because permeability of sintering material bed and edge effect problem cause the serious uneven situation of bed of material top each point intake velocity, is convenient to measure sinter bed intake velocity V
beforeaccuracy.
This method is based on sintering system N
2do not participate in reaction, with N2 balance, carry out air leak rate of air curtain measurement, can measure comparatively simply exactly sintering system air leak rate of air curtain, solved present measuring technique inconvenient operation, error is large, and an anemometry of leaking out can only be measured the shortcoming of local air leak rate of air curtain.
Accompanying drawing explanation
Fig. 1 is to be sintering machine system schematic diagram in the present invention;
Reference numeral: 1, sintering pallet side plate, 2, sinter bed, 3, bellows, 4, flue.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the invention will be further described, but be not limited to this.
As shown in Figure 1, in the present invention, sintering machine system comprises sintering pallet side plate 1, sinter bed 2, bellows 3 and flue 4.
First, sintering pallet side plate 1 is upwards prolonged to the height rising and be greater than 1/2 of sinter bed 2 height, sinter bed 2 thickness are constant, sinter bed 2 tops are formed without material space, height without material space is greater than 1/2 of sinter bed height, two edges and middle three points along height on the pallet side plate 1 above sinter bed 2 are got point measurement and average, and are sinter bed intake velocity V
before, then calculate as follows sinter bed intake Q
before:
Q
before=V
befores
before
In formula: V
before---sinter bed intake velocity;
S
before---the actual ventilative area of sinter bed;
2) take the margin and center point of cross-section radial of sinter fume pipeline 4 is measurement point, measures respectively after averaging and obtains flue-gas temperature T
after, flue gas pressures P
after, flue flue gas stream speed V
afterwith flue nitrogen gas concn N
after, calculate pipeline cross-sectional area S
after, then calculate as follows exhaust gas volumn Q
after:
Q
after=V
afters
after
In formula: V
after---flue flue gas stream speed;
S
after---flue cross-sectional area;
3) nitrogen conservation in sintering process:
0.79 (Q
before+ Q
leak)=Q
aftern
after
In formula: Q
leak---sintering machine inleakage;
By step 1)-2) formula and nitrogen conservation formula calculate
4) as follows by Q
afterbe converted into standard state Q
rear mark,
In formula: T
mark---burn atmospheric temperature under the status of criterion;
P
mark---atmospheric pressure under the status of criterion;
5) calculate as follows air leak rate of air curtain K,
Get and delay on pallet along the two edges of height and the mean value of middle three some intake velocities.Incoming air area is the actual ventilative area of sintering feed.It is sintering intake.Air intake is room temperature normal pressure, is respectively respectively and uses
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, will be understood by those skilled in the art that, technical scheme of the present invention is modified or is equal to replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. a method of measuring air-leaking rate of sinter machine system, said method comprising the steps of:
1) sintering pallet side plate (1) is upwards prolonged to liter, make sinter bed (2) surface and sintering pallet side plate (1) upper along forming without material space, then in sinter bed (2) top, get point measurement sinter bed intake velocity V
before, then calculate as follows sinter bed intake Q
before:
Q
before=V
befores
before
In formula: V
before---sinter bed intake velocity;
S
before---the actual ventilative area of sinter bed;
2) take the margin and center point of cross-section radial of sinter fume pipeline (4) is measurement point, measures respectively after averaging and obtains flue-gas temperature T
after, flue gas pressures P
after, flue flue gas stream speed V
afterwith flue nitrogen gas concn N
after, calculate pipeline cross-sectional area S
after, then calculate as follows exhaust gas volumn Q
after:
Q
after=V
afters
after
In formula: V
after---flue flue gas stream speed;
S
after---flue cross-sectional area;
3) nitrogen conservation in sintering process:
0.79 (Q
before+ Q
leak)=Q
aftern
after
In formula: Q
leak---sintering machine inleakage;
By step 1)-2) formula and nitrogen conservation formula calculate
4) as follows by Q
afterbe converted into standard state Q
rear mark,
In formula: T
mark---atmospheric temperature under the status of criterion;
P
mark---atmospheric pressure under the status of criterion;
5) calculate as follows air leak rate of air curtain K,
。
2. measure according to claim 1 the method for air-leaking rate of sinter machine system, it is characterized in that, described step 1) in sintering pallet side plate (1) upwards prolonged to rise be greater than 1/2 of sinter bed (2) height.
3. measure according to claim 1 the method for air-leaking rate of sinter machine system, it is characterized in that, the upper two edges along height of pallet side plate (1) and middle three points in sinter bed (2) top are got point measurement and average, and are sinter bed intake velocity V
before.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501876A (en) * | 2015-01-09 | 2015-04-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for dynamically monitoring air leakage of titanium dioxide production clinker sensible heat recovery system |
| CN106124136A (en) * | 2016-06-24 | 2016-11-16 | 宝山钢铁股份有限公司 | A kind of sintering ring cold machine trolley air leak rate of air curtain on-line testing method and device |
| CN106768716A (en) * | 2016-12-08 | 2017-05-31 | 钢研晟华工程技术有限公司 | A kind of method for reducing Ore Sintering Process air leak rate of air curtain |
| CN108020384A (en) * | 2017-11-07 | 2018-05-11 | 中南大学 | Sintering machine body inleakage equivalent detecting method based on fluid energy conservation |
| CN109556665A (en) * | 2018-11-26 | 2019-04-02 | 北京金盾华通科技有限公司 | A kind of exhaust uptake resistance and air leakage rate testing system and method |
| CN110657922A (en) * | 2019-09-20 | 2020-01-07 | 天津大学 | Test method for detecting air leakage coefficient of fresh air system with particulate filter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104501876A (en) * | 2015-01-09 | 2015-04-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for dynamically monitoring air leakage of titanium dioxide production clinker sensible heat recovery system |
| CN104501876B (en) * | 2015-01-09 | 2017-03-15 | 攀钢集团攀枝花钢铁研究院有限公司 | The method that dynamic monitoring Producing Titanium Dioxide grog cement sensible heat recovery system leaks out |
| CN106124136A (en) * | 2016-06-24 | 2016-11-16 | 宝山钢铁股份有限公司 | A kind of sintering ring cold machine trolley air leak rate of air curtain on-line testing method and device |
| CN106124136B (en) * | 2016-06-24 | 2019-09-20 | 宝山钢铁股份有限公司 | A kind of sintering ring cold machine trolley air leak rate of air curtain on-line testing method |
| CN106768716A (en) * | 2016-12-08 | 2017-05-31 | 钢研晟华工程技术有限公司 | A kind of method for reducing Ore Sintering Process air leak rate of air curtain |
| CN106768716B (en) * | 2016-12-08 | 2019-06-28 | 钢研晟华工程技术有限公司 | A method of reducing Ore Sintering Process air leak rate of air curtain |
| CN108020384A (en) * | 2017-11-07 | 2018-05-11 | 中南大学 | Sintering machine body inleakage equivalent detecting method based on fluid energy conservation |
| CN108020384B (en) * | 2017-11-07 | 2019-08-06 | 中南大学 | Sintering machine ontology inleakage equivalent detecting method based on fluid energy conservation |
| CN109556665A (en) * | 2018-11-26 | 2019-04-02 | 北京金盾华通科技有限公司 | A kind of exhaust uptake resistance and air leakage rate testing system and method |
| CN110657922A (en) * | 2019-09-20 | 2020-01-07 | 天津大学 | Test method for detecting air leakage coefficient of fresh air system with particulate filter |
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