CN101995448A - Method for testing air leakage rate of sintering machine - Google Patents
Method for testing air leakage rate of sintering machine Download PDFInfo
- Publication number
- CN101995448A CN101995448A CN2009100134236A CN200910013423A CN101995448A CN 101995448 A CN101995448 A CN 101995448A CN 2009100134236 A CN2009100134236 A CN 2009100134236A CN 200910013423 A CN200910013423 A CN 200910013423A CN 101995448 A CN101995448 A CN 101995448A
- Authority
- CN
- China
- Prior art keywords
- measuring point
- air
- sintering
- content
- sintering machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005245 sintering Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002912 waste gas Substances 0.000 claims abstract description 10
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000004458 analytical method Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 238000010205 computational analysis Methods 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000009423 ventilation Methods 0.000 abstract description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract 1
- 239000011707 mineral Substances 0.000 abstract 1
- 238000005070 sampling Methods 0.000 abstract 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 238000010998 test method Methods 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for testing air leakage rate of a sintering machine, which is characterized in that a vacuum pump is used for simultaneously and respectively sampling waste gas at the bottom of a sintering machine trolley and an outlet of a fan, and the method comprises the following steps: 1) adopting an Ordovician analyzer to perform chemical component CO on the waste gas sample2And O2Analyzing the content of ; 2) calculate front and rear measuring points CO2Value of change in content KCO2(%) and O2Ratio of change in content KO2(%); 3) substituting the values into an air leakage rate formula to calculate the air leakage rate based on CO2And O2Average air leakage rate value K of two components:
the front and rear measuring points can be arranged on any section of the ventilation pipeline. The invention has the beneficial effects that: the invention is realized by adding O in the pipe network of the sintering machine2And CO2The air leakage rate of the sintering pipe network is determined by analyzing the two components, so that the quantity of the effective air quantity in the sintering process can be mastered, and the aims of reasonably using the effective air quantity, improving the quality of sintered mineral products and providing theoretical basis for reducing the power consumption are fulfilled.
Description
Technical field
The present invention relates to a kind of method of testing of sintering machine air leak rate of air curtain.
Background technology
SINTERING PRODUCTION is guiding principle with wind, require by the effective wind rate of sinter bed The more the better, but because equipment attrition or raw materials for sintering gas penetration potential worsen, cause reducing by the effective wind rate of sinter bed, other air quantity is taken a shortcut, enter from sintering machine head end tail-hood plate, bellows interface, chassis seam etc., blower fan is flogged a dead horse, wasted a large amount of power consumptions, the sintering deposit cost increases, in order to understand the quantity of gas in the sintering machine ventilation pipe network that bleeds, grasp the use of the reasonable air quantity of sintering, need sintering machine ventilating system air leak rate of air curtain is measured.
Conventional at present method is a kind of to be: adopt the air quantity control methods, air quantity and the contrast of outlet air quantity promptly enter the mouth, the greatest problem that this method exists is that error is bigger, a kind of air leakage rate measuring method of sintering machine system disclosed as known, at first, calculate the effective wind rate Q that enters sinter bed by the charge level wind gage of measuring the sintering pallet different parts
Advance, calculate the total blast volume Q of air exhauster suction large flue by the wind gage in the large flue before the measurement of electrostatic fly-ash separator
Always, calculate the content that it becomes water vapor by the moisture in the compound; The unified then air quantity that is converted under the standard state: Q
Total mark, Q
Advance mark, Q
Water gaugeAt last, be inserted in formula and calculate air leak rate of air curtain B.
Another kind is: adopt the temperature control methods, comprise following steps: 1. under the sintering machine fire grate, sintering bellows arm straight length is provided with thermopair I, thermopair II respectively; Described thermopair I, thermopair II measure the temperature under this preceding sintering machine fire grate that leaks out respectively, and the temperature of the back sintering bellows arm straight length that leaks out, and are designated as t
o, t
m2. above-mentioned data are input to computing machine; 3. computing machine is according to formula: K=C
o[(1-λ) t
o-t
m/ C
o[(1-λ) t
o-t
m]+C
A(t
m-t
A) calculate air leak rate of air curtain K; λ is a heat loss rate, and Co is by CO, CO in the gas
2, O
2, N
2And H
25 key component heat contents of O change calculations obtains, when sintering is stablized, and this C
0Value is a certain value; C
ABe the specific heat of air; It can make operating personnel in time understand the situation of leaking out of sintering machine body, carries out effective leak stopping, t with the handled easily personnel according to actual conditions
ABe the leaked-in air temperature, can record with the 3rd thermopair that shortcoming is not directly perceived, poor accuracy is subject to the uncertain factor influence.
Also having a kind of is the variation of oxygen level in the flue before adopting the zirconia oxygen analyser to measure pallet bottom and discharge, analyze the diluted situation of flue gas, calculate air leak rate of air curtain, shortcoming is to be the benchmark analysis with a kind of composition of oxygen only, accuracy is relatively poor, and is representative not enough.
Summary of the invention
The method of testing that the purpose of this invention is to provide a kind of sintering machine air leak rate of air curtain is by to O in the sintering machine pipe network
2And CO
2The analysis of two kinds of compositions, thus for improving the product quality of sintering deposit, reducing the sintering deposit power consumption provides theoretical foundation.
For solving the problems of the technologies described above, technical scheme of the present invention is:
The method of testing of sintering machine air leak rate of air curtain is characterized in that, respectively sintering pallet bottom and blower fan outlet is got the waste gas sample simultaneously with vacuum pump, presses following step computational analysis:
1) adopt gas analyzer that the waste gas sample is carried out chemical constitution CO
2And O
2Content analysis;
2) calculate front and back measuring point CO
2Content value K
CO2(%) and O
2The content ratio K
O2(%), formula is:
CO
2Measuring point CO before (preceding) expression
2Concentration;
CO
2(back) expression back measuring point CO
2Concentration;
O
2Measuring point O before (preceding) expression
2Concentration; O
2(back) expression back measuring point O
2Concentration;
O
2Oxygen content in (gas) expression atmosphere generally gets 21%;
3) with above-mentioned numerical value substitution air leak rate of air curtain formula, calculate based on CO
2And O
2The average air leak rate of air curtain value K of two kinds of compositions:
Described front and back measuring point can be arranged on any section of air pipeline, can monitor any section pipeline situation of leaking out, and provides foundation for safeguarding pipeline.
Described formula analyser difficult to understand, Analysis for CO
2And O
2The medicament that uses during two kinds of component contents comprises: 30% potassium hydroxide, pyrogallic acid.
Compared with prior art, the invention has the beneficial effects as follows: the present invention passes through O in the sintering machine pipe network
2And CO
2The analysis of two kinds of compositions determines sintering pipe network air leak rate of air curtain, is beneficial to grasp the quantity of sintering process effective wind rate, reaches reasonable use effective wind rate, improves the sintering deposit product quality, reduces the purpose that power consumption provides theoretical foundation.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
1-sintering pallet 2-bellows 3-cover plate 4-blower fan 5-pipeline 6-portfire 7-fly-ash separator among the figure
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
The method of testing of sintering machine air leak rate of air curtain is got the waste gas sample to sintering pallet 1 bottom (preceding measuring point) and blower fan 4 outlets (back measuring point) respectively simultaneously with vacuum pump, requires to guarantee the enough tolerance of getting, and is representative, presses following step computational analysis:
1) adopt formula analyser difficult to understand that the waste gas sample is carried out chemical constitution CO
2And O
2Content analysis, formula analyser difficult to understand, Analysis for CO
2And O
2The medicament that uses during two kinds of component contents comprises: 30% potassium hydroxide, pyrogallic acid, analytical procedure program in accordance with regulations carry out.
2) calculate front and back measuring point CO
2Content value K
CO2(%) and O
2Content ratio K O
2(%), formula is:
CO
2Measuring point CO before (preceding) expression
2Concentration;
CO
2(back) expression back measuring point CO
2Concentration;
O
2Measuring point O before (preceding) expression
2Concentration; O
2(back) expression back measuring point O
2Concentration;
O
2Oxygen content in (gas) expression atmosphere generally gets 21%;
3) with above-mentioned numerical value substitution air leak rate of air curtain formula, calculate based on CO
2And O
2The average air leak rate of air curtain value K of two kinds of compositions:
Before and after measuring point can be arranged on any section of air pipeline 5, can monitor any section pipeline 5 situation of leaking out, provide foundation for safeguarding pipeline 5, especially note the inleakage that monitoring sintering machine head end tail-hood plate 3, bellows 2 interfaces, sintering pallet 1 seam etc. are located.
On sintering pallet 1 bottom and blower fan 4 export pipelines 5, two samplers are set respectively during measurement, will carry out simultaneously when getting the waste gas sample,, make chassis 1 bottom O because the burning sintering reaction takes place at chassis 1 place
2Lower, CO
2Measure higherly, do chemical composition analysis, general O through formula analyser difficult to understand
2Content 8～12%, CO
2Content 6～8%, and diluted the O the waste gas on the way from bellows 2 various forms of leaking out after fly-ash separator 7 exports to blower fan 4
2And CO
2Composition, general O
2Content rises to 10～14%, CO
2Content is reduced to 1～5%, and calculating average air leak rate of air curtain is 35～45%.
Claims (2)
1. the method for testing of sintering machine air leak rate of air curtain is characterized in that, respectively sintering pallet bottom and blower fan outlet is got the waste gas sample simultaneously with vacuum pump, presses following step computational analysis:
1) adopt gas analyzer that the waste gas sample is carried out chemical constitution CO
2And O
2Content analysis;
2) calculate front and back measuring point CO
2Content value K
CO2(%) and O
2The content ratio K
O2(%), formula is:
CO
2Measuring point CO before (preceding) expression
2Concentration;
CO
2(back) expression back measuring point CO
2Concentration;
O
2Measuring point O before (preceding) expression
2Concentration; O
2(back) expression back measuring point O
2Concentration;
O
2Oxygen content in (gas) expression atmosphere generally gets 21%;
3) with above-mentioned numerical value substitution air leak rate of air curtain formula, calculate based on CO
2And O
2The average air leak rate of air curtain value K of two kinds of compositions:
2. the method for testing of sintering machine air leak rate of air curtain according to claim 1 is characterized in that, described front and back measuring point can be arranged on any section of air pipeline, can monitor any section pipeline situation of leaking out, and provides foundation for safeguarding pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100134236A CN101995448A (en) | 2009-08-26 | 2009-08-26 | Method for testing air leakage rate of sintering machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100134236A CN101995448A (en) | 2009-08-26 | 2009-08-26 | Method for testing air leakage rate of sintering machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101995448A true CN101995448A (en) | 2011-03-30 |
Family
ID=43785887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100134236A Pending CN101995448A (en) | 2009-08-26 | 2009-08-26 | Method for testing air leakage rate of sintering machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101995448A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213708A (en) * | 2011-04-09 | 2011-10-12 | 山东电力研究院 | Method for testing air leak rate of air preheater |
| CN103033052A (en) * | 2012-12-27 | 2013-04-10 | 中冶长天国际工程有限责任公司 | Method and system for determining effective air quantity |
| CN104165737A (en) * | 2014-07-30 | 2014-11-26 | 马钢(集团)控股有限公司 | Air leakage checking method of sintering machine |
| CN105181256A (en) * | 2015-08-14 | 2015-12-23 | 中国神华能源股份有限公司 | Oxygen-rich combustion air leak monitoring method and system |
| CN105181257A (en) * | 2015-08-14 | 2015-12-23 | 中国神华能源股份有限公司 | Oxygen-rich combustion air leak monitoring method and system |
| CN105388258A (en) * | 2015-12-21 | 2016-03-09 | 中国神华能源股份有限公司 | Gas pipeline wind leakage apparatus and oxygen-rich combustion system |
| CN104165737B (en) * | 2014-07-30 | 2017-01-04 | 马钢(集团)控股有限公司 | A kind of sintering machine leaks out inspection method |
| CN103886188B (en) * | 2014-03-06 | 2017-01-18 | 上海交通大学 | Rotary-type air pre-heater air leakage rate real-time estimation method based on differential pressure |
| 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 |
| CN106885318A (en) * | 2017-04-10 | 2017-06-23 | 上海云懋空气处理设备有限公司 | A kind of return air leak detection system and method based on rotary dehumidifier |
| CN108020384A (en) * | 2017-11-07 | 2018-05-11 | 中南大学 | Sintering machine body inleakage equivalent detecting method based on fluid energy conservation |
| CN110345767A (en) * | 2019-07-31 | 2019-10-18 | 马鞍山钢铁股份有限公司 | A kind of exhausting system of sintering machine and air leak test judgment method |
| TWI688771B (en) * | 2018-12-06 | 2020-03-21 | 中國鋼鐵股份有限公司 | Device and method for measuring effective wind speed of sintering bed |
| 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 |
| CN113203296A (en) * | 2021-04-26 | 2021-08-03 | 辽宁科技大学 | On-line monitoring method for air leakage of flue of steel rolling heating furnace |
-
2009
- 2009-08-26 CN CN2009100134236A patent/CN101995448A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213708A (en) * | 2011-04-09 | 2011-10-12 | 山东电力研究院 | Method for testing air leak rate of air preheater |
| CN102213708B (en) * | 2011-04-09 | 2014-03-12 | 山东电力研究院 | Method for testing air leak rate of air preheater |
| CN103033052A (en) * | 2012-12-27 | 2013-04-10 | 中冶长天国际工程有限责任公司 | Method and system for determining effective air quantity |
| CN103033052B (en) * | 2012-12-27 | 2014-09-03 | 中冶长天国际工程有限责任公司 | Method and system for determining effective air quantity |
| CN103886188B (en) * | 2014-03-06 | 2017-01-18 | 上海交通大学 | Rotary-type air pre-heater air leakage rate real-time estimation method based on differential pressure |
| CN104165737A (en) * | 2014-07-30 | 2014-11-26 | 马钢(集团)控股有限公司 | Air leakage checking method of sintering machine |
| CN104165737B (en) * | 2014-07-30 | 2017-01-04 | 马钢(集团)控股有限公司 | A kind of sintering machine leaks out inspection method |
| CN105181256A (en) * | 2015-08-14 | 2015-12-23 | 中国神华能源股份有限公司 | Oxygen-rich combustion air leak monitoring method and system |
| CN105181257A (en) * | 2015-08-14 | 2015-12-23 | 中国神华能源股份有限公司 | Oxygen-rich combustion air leak monitoring method and system |
| CN105388258A (en) * | 2015-12-21 | 2016-03-09 | 中国神华能源股份有限公司 | Gas pipeline wind leakage apparatus and oxygen-rich combustion system |
| 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 |
| CN106885318A (en) * | 2017-04-10 | 2017-06-23 | 上海云懋空气处理设备有限公司 | A kind of return air leak detection system and method based on rotary dehumidifier |
| 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 |
| TWI688771B (en) * | 2018-12-06 | 2020-03-21 | 中國鋼鐵股份有限公司 | Device and method for measuring effective wind speed of sintering bed |
| CN110345767A (en) * | 2019-07-31 | 2019-10-18 | 马鞍山钢铁股份有限公司 | A kind of exhausting system of sintering machine and air leak test judgment method |
| 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 |
| CN113203296A (en) * | 2021-04-26 | 2021-08-03 | 辽宁科技大学 | On-line monitoring method for air leakage of flue of steel rolling heating furnace |
| CN113203296B (en) * | 2021-04-26 | 2023-11-10 | 辽宁科技大学 | Online monitoring method for flue air leakage of steel rolling heating furnace |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110330 |
|
| RJ01 | Rejection of invention patent application after publication |