CN103418195A - Deashing and pre-dedusting device for SCR denitration system - Google Patents
Deashing and pre-dedusting device for SCR denitration system Download PDFInfo
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- CN103418195A CN103418195A CN2013104095735A CN201310409573A CN103418195A CN 103418195 A CN103418195 A CN 103418195A CN 2013104095735 A CN2013104095735 A CN 2013104095735A CN 201310409573 A CN201310409573 A CN 201310409573A CN 103418195 A CN103418195 A CN 103418195A
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- flue
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- dedusting device
- filter screen
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Abstract
The invention discloses a deashing and pre-dedusting device for an SCR denitration system. The deashing and pre-dedusting device comprises a flue with a rectangular cross section, an ash filter, a vibration exciter, a differential pressure monitor, an ash hopper and a bin type pneumatic conveying pump. The ash filter is horizontally arranged in the flue in an inclined mode, the vibration exciter and the differential pressure monitor are located above the outer wall of the flue, the vibration exciter is connected with the ash filter through a vibration arm, the ash hopper is connected to the position below the flue, and the bin type pneumatic conveying pump is connected to the lower end of the ash hopper. According to the deashing and pre-dedusting device, the ash filter is used for intercepting large-granular dust in original flue gas, the differential pressure monitor is used for monitoring the difference between the pressure on the front side of the ash filter and the pressure on the back side of the ash filter, the vibration exciter vibrates to drive a filter screen to vibrate so as to enable accumulated dust attached to the filter screen to fall through vibration, the accumulated dust fallen through vibration falls in the ash hopper below the flue, and finally the accumulated dust is sent to an ash warehouse through the bin type pneumatic conveying pump. The whole process is controlled by a control center and completed automatically in an on-line mode, and no manual operation is needed. The deashing and pre-dedusting device for the SCR denitration system has the advantages of improving working environment, improving working efficiency and saving labor cost.
Description
Technical field
The present invention relates to a kind of SCR denitrating system, be specifically related to a kind of on-line automatic ash removal flue gas pre-dedusting device for the SCR denitrating system.
Background technology
Current existing SCR denitrating system, because former flue gas directly enters the SCR reactor without dedusting, the bulky grain dust bulk deposition in flue gas, on catalyst, causes catalyst poisoning, and obviously shortened the service life of catalyst.Not only cause huge economic loss, and have a strong impact on the normal operation of SCR system, the owner avenges a grievance and complains very headache of the environmental protection producer that undertakes the construction of of order.Engineering practice proves existing SCR denitrating system; before entering the SCR reactor, do not take former flue gas any dust suppression; due to the defect on design technology cause the bulky grain dust unblocked enter the SCR reactor, cause catalyst poisoning to be had a greatly reduced quality service life, the frequent replacing of having to.Existing this drawback of SCR denitrating system is the research topic of current field of Environment Protection, is also the technical barrier that environmental protection producer feels more headache.In recent years the environmental protection producer had has developed a kind of screen pack and tiltedly has been located in flue, really the bulky grain dust can be tackled, thereby reduce the probability that the bulky grain dust enters the SCR reactor, but the operation of filter screen deashing is troubling.This steel screen frame is very huge, weighs half ton, after the long-pending full bulky grain dust of filter screen, can reach one ton multiple.When filter screen is extracted out from flue, adopt manually-operated lifting appliance (electric hoist), peel off unrestrained from filter screen because shaking a large amount of dusts in taking out the process of hanging.The airborne dust of working site disperse not only contaminated environment and serious harm Health Status For Workers Exposed.Filter screen is also wanted artificial deashing (with scoop and the additional compressed air of besom) after extracting out, the on-the-spot chaotic state in which corrupt practices prevail of deashing, make us suffocating, and owner unit suffers untold misery.While taking out in addition the net deashing, filter screen is extracted the bulky grain dust out from flue and is entered the SCR reactor.Take out the operation of net deashing once a day, the activity duration reaches more than one hour.Consequently still have a large amount of bulky grain dusts to enter the SCR reactor, the problem of catalyst poisoning also fails thoroughly to solve.
Summary of the invention
The object of the present invention is to provide a kind of for the automation of SCR denitrating system, innoxious flue gas pre-dedusting device.
This pre-dedusting device of the deashing for the SCR denitrating system disclosed by the invention, it comprises flue, leaching device, vibrator, pressure reduction monitor, ash bucket, the storehouse formula Pneumatic conveying pump that cross section is rectangle; The leaching device laterally is inclined in flue, and vibrator and pressure reduction monitor are positioned at the outer wall top of flue, and vibrator is connected with the leaching device by shaker arm, and ash bucket is connected in the below of flue, and storehouse formula Pneumatic conveying pump is connected in the lower end of ash bucket.
Two longitudinal side walls of described flue are useful on the chute of the dove-tail form that described leaching device is installed, described leaching device comprises filter screen and the fixing housing of filter screen, the profile on limit, the housing left and right sides is and the dove-tail form of chute coupling that they slidably are embedded in corresponding chute.
The upper side edge of described housing is useful on the suspension ring that connect electric hoisting equipment.
Described vibrator is the eccentric wheel vibrator, between its bracing frame and described flue upper outer wall, is lined with the vibration damping rubber cushion, between bracing frame and flue, passes through bolted.
The upper end of described shaker arm is connected in the bottom of described vibrator, and lower end is connected with described filter screen by connecting plate.
Described pressure reduction monitor is connected with two pressure probe tubes, and the pressure probe tube lays respectively at front side and the rear side of filter screen, is fixed on the inwall of described flue.
The taper bucket that described ash bucket is convergent, its upper end is connected on the lower wall of described flue, and corresponding breach is arranged on flue, and its lower port is connected with push-pull valve.
A level sensor is arranged at the top of the defeated ash silo of described storehouse formula Pneumatic conveying pump.
The present invention tackles the bulky grain dust in former flue gas by filter screen is set in flue, filter screen by between housing and flue for slidably being connected; The pressure reduction of side before and after the pressure probe tube monitoring filter screen connected by the pressure reduction monitor, shuttle belt electric filter vibration by vibrator shakes the dust stratification adhered on it fall, and the dust stratification that falls of shaking falls in the ash bucket of flue below and finally by storehouse formula Pneumatic conveying pump, delivers to grey storehouse.Whole process can be controlled by control centre, when the pressure reduction monitor monitors reaches design load to the pressure differential of side before and after filter screen, control centre sends instruction to vibrator, vibrator is automatically opened and is produced vibration, by the vibration of shaker arm band electric filter, online dust stratification is shaken, when before and after monitoring filter screen, the pressure reduction of side is zero, control centre sends instruction to vibrator, vibrator stops vibration, a deashing end of job automatically.Filter screen by between housing and flue for slidably being connected, directly from the top of flue, hang out and get final product when installing and changing.
With prior art, compare, dedusting of the present invention, deashing and defeated grey operation be on-line automatic completing under SCR denitrating system running status all, without manually-operated.During deashing, filter screen, without extraction, has been stopped reentrainment of dust, and during deashing, filter screen is still tackled the bulky grain dust in flue gas, has realized that dedusting, deashing neglect neither.There is the advantage of improving working environment, increasing work efficiency, save cost of labor.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the leaching device mounting structure schematic diagram in Fig. 1.
Schematic diagram is looked on the right side that Fig. 3 is Fig. 2.
The specific embodiment
As shown in Figure 1 to Figure 3, this on-line automatic deashing pre-dedusting device for the SCR denitrating system disclosed by the invention, comprise flue 1, leaching device 2, vibrator 3, pressure reduction monitor 4, ash bucket 5, storehouse formula Pneumatic conveying pump 6 that cross section is rectangle.Leaching device 2 laterally is inclined in flue 1, and vibrator 3 and pressure reduction monitor 4 are positioned at the outer wall top of flue 1, and vibrator 3 is connected with leaching device 2 by shaker arm 7, and ash bucket 5 is positioned at the below of flue 1, and storehouse formula Pneumatic conveying pump 6 is connected in the lower end of ash bucket 5.
Two longitudinal side walls of flue 1 are useful on the chute of the dove-tail form that leaching device 2 is installed.Leaching device 2 comprises filter screen 21 and the fixing housing 22 of filter screen 21, and the profile on the limit, the left and right sides of housing 22 is and the dove-tail form of flue 1 sidewall chute coupling that they slidably are embedded in corresponding chute.The upper side edge of housing 22 is useful on the suspension ring 23 that connect electric hoisting equipment, and corresponding housing 22 places, flue 1 top offer corresponding notch.Vibrator 3 is the eccentric wheel vibrator, is lined with the vibration damping rubber cushion 8 of silicon rubber bearing between its bracing frame and flue 1 upper outer wall, passes through bolted.The lower end of shaker arm 7 is connected with filter screen 21 by connecting plate 9.Pressure reduction monitor 3 is connected with two pressure probe tubes 31, and front side and rear side that they lay respectively at filter screen 21, be fixed on the inwall of flue 1.The taper bucket that ash bucket 5 is convergent, its upper end is connected on the lower wall of flue 1, and corresponding breach is arranged on flue 1, and its lower port is connected with push-pull valve 10.A level sensor 11 is arranged at the top of storehouse formula Pneumatic conveying pump 6 defeated ash silos.
This device is connected between the entrance of the exhanst gas outlet of boiler economizer and SCR reactor, the angled inwall that is inclined in flue 1 of filter screen 21, the housing 22 of filter screen 21 and filter screen 21 all adopt the stainless steel of corrosion-proof and abrasion-proof and high temperature proof to make, and the left and right side frame of filter screen 21 adopts the dove-tail form chute to dock with the longitudinal side wall of flue 1.During system works, filter screen 21 is arranged in flue 1, during filter screen 21 installation and maintenance, adopts electric hoist to extract out and insert; the specification of filter screen 21 is determined as required; take and can tackle the bulky grain dust as design load, granule dust and flue gas can smooth and easyly pass through, and guarantee not affect the normal operation of boiler.
Operation principle of the present invention is as follows: when former flue gas, from boiler economizer, enter flue 1 while contacting with filter screen 21, the bulky grain dust is blocked, flue gas enters in the SCR reactor, flue gas the pressure of filter screen 21 front and back sides will along with filter screen 21 interception bulky grain dust quantity the number change, when the dust stratification amount is few, the pressure reduction of filter screen 21 front and back sides is little, increase gradually along with the dust stratification amount, the pressure reduction of front and back side increases thereupon, after pressure reduction reaches design load, pressure reduction monitor 4 is passed to control centre by signal, control centre sends instruction to vibrator 3, vibrator 3 is automatically opened and is produced vibration, by shaker arm 7, with electric filter 21 vibrations, online dust stratification is shaken, when the pressure reduction that monitors filter screen 21 front and back sides is zero, control centre sends instruction to vibrator 3, vibrator 3 stops vibration automatically, a deashing end of job.
The dust stratification fallen that shakes on filter screen 21 falls in the ash bucket 5 of flue 1 below, when the dust stratification in ash bucket 5 reaches design weight, push-pull valve 10 is opened the dust in ash bucket 5 is let out to the defeated ash silo of lower square Pneumatic conveying pump 6, when the dust height in defeated ash silo reaches level sensor 11 place, grain level sensor 11 is to control centre's output signal, and control centre controls 6 startups of storehouse formula Pneumatic conveying pump dust is delivered to grey storehouse.
Claims (8)
1. the pre-dedusting device of the deashing for the SCR denitrating system, it is characterized in that: this device comprises flue, leaching device, vibrator, pressure reduction monitor, ash bucket, the storehouse formula Pneumatic conveying pump that cross section is rectangle; The leaching device laterally is inclined in flue, and vibrator and pressure reduction monitor are positioned at the outer wall top of flue, and vibrator is connected with the leaching device by shaker arm, and ash bucket is connected in the below of flue, and storehouse formula Pneumatic conveying pump is connected in the lower end of ash bucket.
2. the pre-dedusting device of the deashing for the SCR denitrating system as claimed in claim 1, it is characterized in that: two longitudinal side walls of described flue are useful on the chute of the dove-tail form that described leaching device is installed, described leaching device comprises filter screen and the fixing housing of filter screen, the profile on limit, the housing left and right sides is and the dove-tail form of chute coupling that they slidably are embedded in corresponding chute.
3. the pre-dedusting device of the deashing for the SCR denitrating system as claimed in claim 2 is characterized in that: the upper side edge of described housing is useful on the suspension ring that connect electric hoisting equipment.
4. the pre-dedusting device of the deashing for the SCR denitrating system as claimed in claim 1, it is characterized in that: described vibrator is the eccentric wheel vibrator, be lined with the vibration damping rubber cushion between its bracing frame and described flue upper outer wall, between bracing frame and flue, pass through bolted.
5. the pre-dedusting device of the deashing for the SCR denitrating system as claimed in claim 2, it is characterized in that: the upper end of described shaker arm is connected in the bottom of described vibrator, and lower end is connected with described filter screen by connecting plate.
6. the pre-dedusting device of the deashing for the SCR denitrating system as claimed in claim 1, it is characterized in that: described pressure reduction monitor is connected with two pressure probe tubes, and the pressure probe tube lays respectively at front side and the rear side of filter screen, is fixed on the inwall of described flue.
7. the pre-dedusting device of the deashing for the SCR denitrating system as claimed in claim 1 is characterized in that: the taper bucket that described ash bucket is convergent, and its upper end is connected on the lower wall of described flue, and corresponding breach is arranged on flue, and its lower port is connected with push-pull valve.
8. the pre-dedusting device of the deashing for the SCR denitrating system as claimed in claim 1, it is characterized in that: a level sensor is arranged at the top of the defeated ash silo of described storehouse formula Pneumatic conveying pump.
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| CN2013104095735A CN103418195A (en) | 2013-09-11 | 2013-09-11 | Deashing and pre-dedusting device for SCR denitration system |
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| CN2013104095735A CN103418195A (en) | 2013-09-11 | 2013-09-11 | Deashing and pre-dedusting device for SCR denitration system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247344A (en) * | 2016-10-03 | 2016-12-21 | 成都蒲江珂贤科技有限公司 | Self-temperature-control type environmental protection type agricultural trash burner |
| CN106705087A (en) * | 2017-03-11 | 2017-05-24 | 闽西职业技术学院 | Flue ash removal device |
| CN107185924A (en) * | 2017-05-25 | 2017-09-22 | 武夷学院 | A kind of new type auto flue deashing apparatus for eliminating sludge |
| CN107930288A (en) * | 2017-12-12 | 2018-04-20 | 王柱盛 | A kind of smoke pipe filtration apparatus with automatic ash removing function |
| CN108339358A (en) * | 2018-03-09 | 2018-07-31 | 江苏创新环境工程有限公司 | A kind of centrifugal dedusting depassing unit |
| CN108671667A (en) * | 2018-06-29 | 2018-10-19 | 成都易态科技有限公司 | It is a kind of to discharge gas for external environment to realize the device of equipment release |
| CN108716750A (en) * | 2018-04-30 | 2018-10-30 | 中山市宝军电子有限公司 | A kind of air exhausting device with sand-proof function |
| CN108854287A (en) * | 2018-07-17 | 2018-11-23 | 江苏中建材环保研究院有限公司 | A kind of cement kiln SCR denitration device and technique with bulky grain ash blocking apparatus |
| CN110368802A (en) * | 2018-04-12 | 2019-10-25 | 河北中煤旭阳焦化有限公司 | Desulfurizing tower ash discharge preventing clogging up device |
| CN112677363A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Method and device for filtering particle impurities in dilute-phase pneumatic conveying purified terephthalic acid product |
| CN113203087A (en) * | 2021-04-29 | 2021-08-03 | 嘉善县洪峰热电有限公司 | Energy-saving water circulation heating system |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106247344A (en) * | 2016-10-03 | 2016-12-21 | 成都蒲江珂贤科技有限公司 | Self-temperature-control type environmental protection type agricultural trash burner |
| CN106247344B (en) * | 2016-10-03 | 2018-01-30 | 谢文杰 | Self-temperature-control type environmental protection type agricultural trash burner |
| CN106705087A (en) * | 2017-03-11 | 2017-05-24 | 闽西职业技术学院 | Flue ash removal device |
| CN107185924A (en) * | 2017-05-25 | 2017-09-22 | 武夷学院 | A kind of new type auto flue deashing apparatus for eliminating sludge |
| CN107930288A (en) * | 2017-12-12 | 2018-04-20 | 王柱盛 | A kind of smoke pipe filtration apparatus with automatic ash removing function |
| CN107930288B (en) * | 2017-12-12 | 2020-06-16 | 江苏品德再生资源有限公司 | Tobacco pipe filter equipment with automatic deashing function |
| CN108339358A (en) * | 2018-03-09 | 2018-07-31 | 江苏创新环境工程有限公司 | A kind of centrifugal dedusting depassing unit |
| CN110368802A (en) * | 2018-04-12 | 2019-10-25 | 河北中煤旭阳焦化有限公司 | Desulfurizing tower ash discharge preventing clogging up device |
| CN108716750A (en) * | 2018-04-30 | 2018-10-30 | 中山市宝军电子有限公司 | A kind of air exhausting device with sand-proof function |
| CN108671667A (en) * | 2018-06-29 | 2018-10-19 | 成都易态科技有限公司 | It is a kind of to discharge gas for external environment to realize the device of equipment release |
| CN108854287A (en) * | 2018-07-17 | 2018-11-23 | 江苏中建材环保研究院有限公司 | A kind of cement kiln SCR denitration device and technique with bulky grain ash blocking apparatus |
| CN112677363A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Method and device for filtering particle impurities in dilute-phase pneumatic conveying purified terephthalic acid product |
| CN113203087A (en) * | 2021-04-29 | 2021-08-03 | 嘉善县洪峰热电有限公司 | Energy-saving water circulation heating system |
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Application publication date: 20131204 |