CN106768716B - A method of reducing Ore Sintering Process air leak rate of air curtain - Google Patents
A method of reducing Ore Sintering Process air leak rate of air curtain Download PDFInfo
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- CN106768716B CN106768716B CN201611123447.3A CN201611123447A CN106768716B CN 106768716 B CN106768716 B CN 106768716B CN 201611123447 A CN201611123447 A CN 201611123447A CN 106768716 B CN106768716 B CN 106768716B
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- sintering
- flue
- leak rate
- electrostatic precipitator
- air
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Classifications
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- 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
- G01M3/28—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—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 for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/04—Sintering
Abstract
The present invention relates to a kind of air leak rate of air curtain methods that reduction Ore Sintering Process is sintered flue collector to flue-gas dust-removing and desulfurization system, which is characterized in that comprises the steps of: (1), test sintering flue collector flue gas flow V1And SO2Concentration C1；(2), flue gas flow V before test sintering electrostatic precipitator2And SO2Concentration C2；(3), flue gas flow V after test sintering electrostatic precipitator3And SO2Concentration C3；(4), flue gas flow V before test sintering desulfuration entrance4And SO2Concentration C4；(5), each section air leak rate of air curtain is calculated；(6), leak stopping takes leaking-stopping measure according to the air leak rate of air curtain result being calculated.This method greatly reduced leaking out for sintering process, to improve Sintering Yield and quality, saves main exhauster power consumption, increases Sintering Yield.
Description
Technical field
The present invention relates to sintering arts, and in particular to a kind of reduction Ore Sintering Process sintering flue collector is de- to flue gas ash removal
The air leak rate of air curtain method of sulphur system.
Background technique
China accounts for about 80% by sintering-blast furnace-bof process production crude steel, and sinter accounts for about blast furnace burden
75%.The SO that sintering process generates2Discharge amount accounts for about the 80% of Steel Production Flow Chart.Sintering production process is generally existing to leak out now
As mainly due to the abrasion of pipeline and expanding with heat and contract with cold that deformation and sealing are bad, management is not in place etc. causes.Its air leak rate of air curtain is because of factory
And it is different.Leaking out for sintering process causes sintering energy consumption to increase, Pollutant emission concentration reduces, handles difficulty etc..Air leak rate of air curtain is reduced,
Every volume increase 1t sinter, can save the electricity charge and constant expense is total to about 40 yuan/t.Assuming that every square meter sintering machine original produces 9500t per year, by
After air leak rate of air curtain reduces by 20%, annual the created benefit value of volume increase is at 100,000 yuan or so.Exhaust gas can be made by reducing air leakage rate of sintering machine
Amount is reduced, temperature increases, and promotes waste heat recovery volume, reduces smoke gas treatment expense.Air leakage rate of sintering machine 10% is reduced, burning can be reduced
Power consumption 1.5kwh/t is tied, sinter quality can be also improved, is advantageously implemented deep-bed sintering, improves sintered discharge gas temperature, is improved
Flue gas waste heat recovery is horizontal.From this, reducing air leak rate of air curtain is that sintering production increases yield, cost is reduced, increases benefit most
Directly, it effectively advances by leaps and bounds.
Summary of the invention
A kind of method for convenient, easy test air leak rate of air curtain that the object of the present invention is to provide Ore Sintering Process.
Technical scheme is as follows:
A kind of air leak rate of air curtain method for reducing Ore Sintering Process and being sintered flue collector to flue-gas dust-removing and desulfurization system, comprising following
Step:
(1), test sintering flue collector flue gas flow V1And SO2Concentration C1；
(2), flue gas flow V before test sintering electrostatic precipitator2And SO2Concentration C2；
(3), flue gas flow V after test sintering electrostatic precipitator3And SO2Concentration C3；
(4), flue gas flow V before test sintering desulfuration entrance4And SO2Concentration C4；
(5), each section air leak rate of air curtain is calculated；
(6), leak stopping takes leaking-stopping measure according to the air leak rate of air curtain result being calculated.
Further, the calculating of step (5) specifically:
(a) before sintering flue to sintering electrostatic precipitator:
V1C1=V '2C2
It is sintered flue and is extremely sintered inleakage=V before electrostatic precipitator2-V′2
It is leaked before sintering flue to sintering electrostatic precipitator
(b) after sintering flue to sintering electrostatic precipitator
V1C1=V '3C3
It is sintered flue and is extremely sintered inleakage=V before electrostatic precipitator3-V′3
It is leaked before sintering flue to sintering electrostatic precipitator
(c) before being sintered flue to sintering desulfuration
V1C1=V '4C4
It is sintered flue and is extremely sintered inleakage=V before electrostatic precipitator4-V′4
It is leaked before sintering flue to sintering electrostatic precipitator
Wherein flue gas flow unit is m3/ h, SO2Concentration unit is mg/m3。
Further, the Process of Leaking Stoppage of the step (6) are as follows:
(6-1) when be sintered flue to sintering electrostatic precipitator before air leak rate of air curtain be less than or equal to 10% when, without processing；
When air leak rate of air curtain is greater than 10% less than or equal to 50% before being sintered flue to sintering electrostatic precipitator, need to take leak stopping
Measure；
When air leak rate of air curtain is greater than 50% before being sintered flue to sintering electrostatic precipitator, flue is replaced；
(6-2) when be sintered flue to sintering electrostatic precipitator after air leak rate of air curtain be less than or equal to 15% when, without processing；
When air leak rate of air curtain is greater than 15% after being sintered flue to sintering electrostatic precipitator, need to take leaking-stopping measure；
(6-3) before being sintered flue to sintering desulfuration air leak rate of air curtain be less than or equal to 15% when, without processing；
When air leak rate of air curtain is greater than 15% less than or equal to 50% before being sintered flue to sintering desulfuration, need to take leaking-stopping measure；
When air leak rate of air curtain is greater than 50% before being sintered flue to sintering desulfuration, pipeline is replaced.
Further, the leaking-stopping measure of the step (6-1) are as follows: sintering flue is overhauled, takes and arranges from back to front
Division determines that position of leaking out, emphasis service conduits junction take the mode of replacement component, welding or asbestos package, reduce leakage
Air quantity.
Further, the leaking-stopping measure of the step (6-2) are as follows: first before detection sintering flue to sintering electrostatic precipitator
Air leak rate of air curtain determines that position of leaking out is before sintering flue to sintering electrostatic precipitator or deduster itself leaks out, and front is leaked out
Processing method is handled according to step (6-1) situation, if electric precipitator leaks out, is needed maintenance down, is determined position of leaking out, in which:
To the Air Leakage of rapping shaft axis hole, 1 casing is made in the junction of rapping shaft and shell side plate, in casing
It is wrapped with asbestos packing linear sealing；
It leaks out to door to access, needs to change door to access；
It leaks out to ash bucket discharge port, need to be mounted with upper and lower level-sensing device on ash bucket to control the height of material position in ash bucket,
Both dust stratification will not have been made to be vented and collaborate in ash bucket, will not cause electric field short circuit because the dust stratification in ash bucket is excessive and secondary raise
Dirt.
Further, the leaking-stopping measure of the step (6-3) are as follows: detection sintering flue is to being sintered electrostatic precipitator first
Before, sintering flue to sintering electrostatic precipitator after air leak rate of air curtain, if any leaking out, processing method is according to step (6-1) or (6-2) feelings
Condition processing；As determined, position of leaking out determines position of leaking out to should gradually detect before sintering desulfuration after be sintered electrostatic precipitator, weighs
Point service conduits junction takes the mode of replacement component, welding or asbestos package, reduces inleakage.
The present invention has the advantages that
Compared with the conventional method, the beneficial effects of the present invention are: test is simple, convenient, and the present invention devises a kind of letter
Easy measurement method obtains judging result by calculating, and by optimization leak repairing technique, the judgement for designing measure processing of leaking out is wanted
It asks, so that the leak repairing efficiency in sintering process greatly improves, greatly reduced leaking out for sintering process, to improve sinter
Yield and quality saves main exhauster power consumption, and sintering production increases yield, reduces cost, reduces exhausted air quantity, temperature liter
It is high；Promote waste heat recovery volume, reduces smoke gas treatment expense.Improve sinter quality, be advantageously implemented deep-bed sintering, improves and burn
Exhaust gas temperature is tied, it is horizontal to improve flue gas waste heat recovery.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is each test point position of the present invention.
Specific embodiment
Below by the technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is only small part in the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without making creative work, belongs to the present invention.
By taking certain steel sintering machine as an example,
Flue gas analyzer is calibrated using calibrating gas, the technical indicator of flue gas analyzer see the table below 1.It is being sintered main cigarette respectively
Before road, electrostatic precipitator, after electrostatic precipitator, flue gas flow and SO are tested before desulfurization entrance2Concentration, using existing instrument connection
Or aperture again, after aperture, sealing can be tightened with bolt, measured again convenient for opening next time.
1 flue gas analyzer technical indicator of table
(a) before sintering flue to sintering electrostatic precipitator
It is sintered flue gas flow V1=548571m3/h
It is sintered SO in flue gas2Concentration C1=2072mg/m3
C before sintering electrostatic precipitator2=1459mg/m3
V ' can be calculated2=778971m3/h
It is sintered flue and is extremely sintered inleakage=V ' before electrostatic precipitator2-V1=778971-548571=230400m3/h
It is leaked before sintering flue to sintering electrostatic precipitator
It needs to take leaking-stopping measure, sintering flue is overhauled, exclusive method from back to front is taken, determines position of leaking out,
Emphasis service conduits junction takes the mode of replacement component, welding or asbestos package, reduces inleakage.
(b) after sintering flue to sintering electrostatic precipitator
It is sintered flue gas flow V1=548571m3/h
It is sintered SO in flue gas2Concentration C1=2072mg/m3
C before sintering electrostatic precipitator3=1400mg/m3
V ' can be calculated3=811885m3/h
It is sintered flue and is extremely sintered inleakage=V ' after electrostatic precipitator3-V1=811885-548571=263314m3/h
Flue is sintered to sintering electrostatic precipitator back leak
Air leak rate of air curtain before detection sintering flue extremely sintering electrostatic precipitator first, determines that position of leaking out is in sintering flue to burning
Before knot electrostatic precipitator or deduster itself leaks out, and processing method is leaked out according to the processing of step (6-1) situation, if electricity removes in front
Dirt device leaks out, and needs maintenance down, determines position of leaking out, in which:
To the Air Leakage of rapping shaft axis hole, 1 casing is made in the junction of rapping shaft and shell side plate, in casing
It is wrapped with asbestos packing linear sealing；
It leaks out to door to access, needs to change door to access；
It leaks out to ash bucket discharge port, need to be mounted with upper and lower level-sensing device on ash bucket to control the height of material position in ash bucket,
Both dust stratification will not have been made to be vented and collaborate in ash bucket, will not cause electric field short circuit because the dust stratification in ash bucket is excessive and secondary raise
Dirt.
(c) before being sintered flue to sintering desulfuration
It is sintered flue gas flow V1=548571m3/h
It is sintered SO in flue gas2Concentration C1=2072mg/m3
SO before sintering desulfuration2Concentration C4=1279mg/m3
Calculate V '4=888685m3/h
It is sintered flue and is extremely sintered inleakage=V ' before electrostatic precipitator4-V1=888685-548571=340114m3/h
It is leaked before sintering flue to sintering electrostatic precipitator
Air leak rate of air curtain is greater than 50% before being sintered flue to sintering desulfuration, replaces pipeline.
By above-mentioned measure, air leakage rate of sintering machine is reduced, specific effect is shown:
1) reducing air leak rate of air curtain can increase production.Every volume increase 1t sinter can save the electricity charge and constant expense 40 yuan/t in total.Often put down
Rice sintering machine original produces 9500t per year, and after being reduced due to air leak rate of air curtain, annual the created benefit value of volume increase is at 100,000 yuan or so.
2) sintering power consumption 4kwh/t can be reduced, sinter quality is improved, is advantageously implemented deep-bed sintering, it is useless to improve sintering
It is horizontal to improve flue gas waste heat recovery for temperature degree.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (5)
1. a kind of method for reducing Ore Sintering Process air leak rate of air curtain, which is characterized in that comprise the steps of:
(1), test sintering flue collector flue gas flow V1And SO2Concentration C1；
(2), flue gas flow V before test sintering electrostatic precipitator2And SO2Concentration C2；
(3), flue gas flow V after test sintering electrostatic precipitator3And SO2Concentration C3；
(4), flue gas flow V before test sintering desulfuration entrance4And SO2Concentration C4；
(5), each section air leak rate of air curtain is calculated；
(6), leak stopping takes leaking-stopping measure according to the air leak rate of air curtain result being calculated；
The calculating of the step (5) specifically:
(a) before sintering flue to sintering electrostatic precipitator:
V1C1=V'2C2
It is sintered flue and is extremely sintered inleakage=V before electrostatic precipitator2-V'2
(b) after sintering flue to sintering electrostatic precipitator
V1C1=V'3C3
It is sintered flue and is extremely sintered inleakage=V before electrostatic precipitator3-V'3
(c) before being sintered flue to sintering desulfuration
V1C1=V'4C4
It is sintered flue and is extremely sintered inleakage=V before electrostatic precipitator4-V'4
Wherein flue gas flow unit is m3/ h, SO2Concentration unit is mg/m3。
2. reducing the method for Ore Sintering Process air leak rate of air curtain as described in claim 1, which is characterized in that the step (6)
Process of Leaking Stoppage are as follows:
(6-1) when be sintered flue to sintering electrostatic precipitator before air leak rate of air curtain be less than or equal to 10% when, without processing；
When air leak rate of air curtain is greater than 10% less than or equal to 50% before being sintered flue to sintering electrostatic precipitator, need that leak stopping is taken to arrange
It applies；
When air leak rate of air curtain is greater than 50% before being sintered flue to sintering electrostatic precipitator, flue is replaced；
(6-2) when be sintered flue to sintering electrostatic precipitator after air leak rate of air curtain be less than or equal to 15% when, without processing；
When air leak rate of air curtain is greater than 15% after being sintered flue to sintering electrostatic precipitator, need to take leaking-stopping measure；
(6-3) before being sintered flue to sintering desulfuration air leak rate of air curtain be less than or equal to 15% when, without processing；
When air leak rate of air curtain is greater than 15% less than or equal to 50% before being sintered flue to sintering desulfuration, need to take leaking-stopping measure；
When air leak rate of air curtain is greater than 50% before being sintered flue to sintering desulfuration, pipeline is replaced.
3. reducing the method for Ore Sintering Process air leak rate of air curtain as claimed in claim 2, which is characterized in that the step (6-1)
Leaking-stopping measure are as follows: sintering flue is overhauled, takes exclusive method from back to front, determines position of leaking out, emphasis service conduits
Junction takes the mode of replacement component, welding or asbestos package, reduces inleakage.
4. reducing the method for Ore Sintering Process air leak rate of air curtain as claimed in claim 2 or claim 3, which is characterized in that the step (6-
2) leaking-stopping measure are as follows: air leak rate of air curtain before detection sintering flue to sintering electrostatic precipitator first determines that position of leaking out is to be sintered
Flue to sintering electrostatic precipitator before or deduster itself leak out, front leak out processing method according to step (6-1) situation at
Reason needs maintenance down if electric precipitator leaks out, and determines position of leaking out, in which:
To the Air Leakage of rapping shaft axis hole, 1 casing is made in the junction of rapping shaft and shell side plate, has been wrapped in casing
Asbestos packing linear sealing；
It leaks out to door to access, needs to change door to access；
It leaks out to ash bucket discharge port, upper and lower level-sensing device need to be mounted on ash bucket to control the height of material position in ash bucket, neither
Dust stratification in ash bucket can be made to be vented and collaborate, electric field short circuit and reentrainment of dust will not be caused because the dust stratification in ash bucket is excessive.
5. reducing the method for Ore Sintering Process air leak rate of air curtain as claimed in claim 2 or claim 3, which is characterized in that the step (6-
3) leaking-stopping measure are as follows: first before detection sintering flue to sintering electrostatic precipitator, after sintering flue to sintering electrostatic precipitator
Air leak rate of air curtain, if any leaking out, processing method is handled according to step (6-1) or (6-2) situation；As determined, position of leaking out is quiet in sintering
Position of leaking out is determined to should gradually detect before sintering desulfuration after electric precipitator, and replacement portion is taken in emphasis service conduits junction
The mode of part, welding or asbestos package, reduces inleakage.
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| CN110285931B (en) * | 2019-07-08 | 2021-09-14 | 广州珠江电力有限公司 | Method for detecting air leakage rate of flue gas heat exchanger of desulfurization device of thermal power plant |
| 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 |
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| CN101995448A (en) * | 2009-08-26 | 2011-03-30 | 鞍钢股份有限公司 | Method for testing air leakage rate of sintering machine |
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| EP1613941A2 (en) * | 2003-04-12 | 2006-01-11 | Forschungszentrum Jülich Gmbh | Device for rapid vacuum control |
| CN101995448A (en) * | 2009-08-26 | 2011-03-30 | 鞍钢股份有限公司 | Method for testing air leakage rate of sintering machine |
| CN104034371A (en) * | 2014-06-19 | 2014-09-10 | 莱芜钢铁集团有限公司 | Method for measuring gas leakage rate of sintering machine system |
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