CN102285535A - Safe energy-saving dynamic pneumatic ash handling system - Google Patents
Safe energy-saving dynamic pneumatic ash handling system Download PDFInfo
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- CN102285535A CN102285535A CN2011101266704A CN201110126670A CN102285535A CN 102285535 A CN102285535 A CN 102285535A CN 2011101266704 A CN2011101266704 A CN 2011101266704A CN 201110126670 A CN201110126670 A CN 201110126670A CN 102285535 A CN102285535 A CN 102285535A
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Abstract
The invention relates to a safe energy-saving dynamic pneumatic ash handling system in a coal-fired power plant. A positive-pressure concentrated phase pneumatic ash handling system which is commonly used at present in the coal-fired power plant is an in-service positive-pressure concentrated phase pneumatic ash handling system which uses a bin pump as secondary storage and conveying equipment. However, in the safe energy-saving dynamic pneumatic ash handling system, the bin pump, a feed valve and a discharge valve are abandoned and are replaced by a numerical control gate, and the problems that alarms for high material level in an ash storage hopper are caused by insufficient conveying capacity of the in-service positive-pressure concentrated phase pneumatic ash handling system and the safe operation of an electrostatic precipitator is threatened can be solved. Not only can the safe energy-saving dynamic pneumatic ash handling system ensure that the alarms for the high material level of the ash storage hopper are not caused, but also the transmission system of the ash handling system can be simplified; and relevant accessories and equipment such as the bin pump, the feed valve and the discharge valve are abandoned, the flowing state and the ash to gas ratio of conveyed ash can also be monitored in real time, the running stability of the ash handling system is improved and the system is enabled to continuously run in a safe and energy-saving state.
Description
Technical field
The present invention relates to a kind of dynamic pneumatic ash removal system of safety and energy-saving of coal-burning power plant.
Technical background
But the fly ash comprehensive application that the coal-burning power plant produces needs ash transfer standby to the grey storehouse of storage.Because defeated ash amount is big, fed distance is far away, needs higher conveying capacity and just can finish conveying.It is the malleation concentrated phase pneumatic ash removal system of main load transfer device that the coal-burning power plant generally adopts at present with the storehouse pump.Reality in conjunction with China; the changeable ature of coal of the ature of coal that the coal-burning power plant uses descends; active service malleation concentrated phase Pneumatic ash conveying system is difficult to adapt to, and takes place to carry through regular meeting and stops up and electrostatic precipitator storage ash bucket high charge level warning accident, seriously threatens the safety and economy operation of coal-burning power plant.For this reason, the research and development of the dynamic pneumatic ash removal system of safety and energy-saving, can thoroughly overcome with the storehouse pump is the various drawbacks that the main malleation concentrated phase pneumatic ash removal system of failing grey equipment is brought.
Summary of the invention
The objective of the invention is: the coal-burning power plant is still generally being adopted with the malleation concentrated phase pneumatic ash removal system of storehouse pump as secondary storage and load transfer device at present, replace it with the dynamic pneumatic ash removal system of safety and energy-saving, simplify transmission system cancellation storehouse pump and charging and discharging valve, substitute the storehouse pump with the numerical control gate, the energy that fly ash is had according to its deadweight and potential energy along the oblique cutting ash tube, do not need the unimpeded inflow ash pipeline of fluidized wind, again with the malleation pressurized air with ash transfer to grey storehouse.
The present invention solves the technical scheme that is adopted that has problems in the ash transfer: cancellation storehouse pump and annex thereof, simplify pneumatic ash removal system, set the row powder flow of the feed flow of fly ash greater than the storage ash bucket, guarantee that the storage ash bucket high charge level can not occur and report to the police, fly ash flows into ash conveying pipe under the deadweight and the effect of potential energy, add malleation, safe, energy-conservation, concentrated phase again, stably carry fly ash.
Description of drawings
Be described further below in conjunction with drawings and Examples.
Accompanying drawing is the formation of the dynamic pneumatic ash removal system of safety and energy-saving:
1. 3. times level-sensing devices of level-sensing device, 4. maintenance insertion plate door 5. compensators 6. numerical control gates 7. angle-inserting type ash tubes 8. ash pipelines 9. air intake assemblies 10. impulse electromagnetic valves 11. blowback pluggings on the storage ash bucket 2.
The specific embodiment
At first in the storage ash bucket under electrostatic precipitator I electric field, select ash discharge amount maximum one, and calculate its maximum ash discharge amount Q (kg/s), the operational throughput of setting fly ash be (Q+ Δ Q) (kg/s), ash disposal system is stored up ash bucket in operational process ash discharge amount is with boiler load and coal-fired proportional variation of ash content, maximum ash discharge amount Qs (kg/s)=Q * boiler load factor (%) in real time of storage ash bucket, and defeated ash amount is provided with by (Qs * 1.1), such setting makes the real-time ash discharge amount of storage ash bucket always less than the operational throughput of ash disposal system, and the storage ash bucket just can not produce high charge level and report to the police.Determine the ash amount (Q+0.1Q) of depositing of storage ash bucket according to such being provided with, that deposits ash amount is provided with the decision ash disposal system when the boiler unit is up to minimum load, the ash amount of depositing and defeated ash that can the determining unit ash-transmission system and suspend time (Q+0.1Q)/(Qs * the 1.1)=T (s) of defeated ash.In the accompanying drawing, the position, middle and lower part of storage ash bucket (1) sidewall under electrostatic precipitator is equipped with level-sensing device (2) and following level-sensing device (3) respectively, storage ash bucket end opening is equipped with maintenance insertion plate door (4), be equipped with compensator (5) and numerical control gate (6) under it, flow into the ash pipeline (8) that connects with it through oblique cutting ash tube (7) according to the throughput of numerical control gate fly ash.Ash disposal system is in operational process, when last level-sensing device (2) can detect the ash position, level-sensing device sends signal and gives numerical control gate (6), suitable aperture can be opened and adjust to the numerical control gate automatically, the effect that makes fly ash comply with its deadweight and potential energy flows to ash pipeline, when the powder position of storage ash bucket is in material level timing down, level-sensing device sends signal SELF CL numerical control gate valve, air intake assembly (9) on the closes compression air pipe stops to supply gas simultaneously, to save compressed air consumption, when last level-sensing device (2) detects the ash position of fly ash once more, system will enter circulation next time.Dynamic powder position when the powder position of storage ash bucket is between the upper and lower level-sensing device makes transportation work always remain on the operation continuously down of maximum defeated ash amount concentrated phase state, and limit high charge level will not appear in the storage ash bucket, guarantees that ash disposal system can be in operation under the energy-saving safe state.By the air intake assembly of ash tube, than the corresponding air supply of input, ash (kg)/gas (kg) ratio is controlled in the scope of concentrated phase conveying by certain grey gas, fly ash and compressed-air actuated compound enter ash pipeline and are delivered to the grey storehouse of storage.In a single day clogging phenomenon takes place in ash pipeline, and the static pressure of ash pipeline can raise, and it is stifled that system can carry out blowback automatically by blowback plugging (11), can recover normal conveying automatically behind the pipe-dredging.
Carry fly ash continuouslyly and unobstructedly, be not easy blockage phenomenon, with the storehouse pump is that the malleation concentrated phase pneumatic ash removal system of main load transfer device can not guarantee that defeated ash amount is always greater than the ash discharge amount of storage ash bucket, cause electrostatic precipitator storage ash bucket to overstock fly ash easily and the warning of storage ash bucket high charge level occurs, the dynamic pneumatic ash removal system of safety and energy-saving can guarantee that ash disposal system the ash bucket high charge level can not occur storing up and report to the police, and makes ash disposal system can be in operation continuously under the energy-saving safe concentrated phase state reposefully.
Claims (2)
1. the dynamic pneumatic ash removal system of the safety and energy-saving of coal-burning power plant's fly ash is by the position, middle and lower part of storage ash bucket (1) sidewall under the electrostatic precipitator level-sensing device (2) and following level-sensing device (3) to be housed respectively, storage ash bucket end opening is equipped with maintenance insertion plate door (4), be equipped with compensator (5) and numerical control gate (6) under it, numerical control gate lower end connects oblique cutting ash tube (7) and connects with ash pipeline (8), the termination of ash pipeline connects air intake assembly (9), also is connected to " air knife " air inlet pipe of tape pulse electromagnetic valve (10) and the blowback plugging road (11) that communicates with electrostatic precipitator storage ash bucket top on ash pipeline.
2. according to claim 1, the dynamic pneumatic ash removal system of peace safety and energy-saving, cancellation is the storehouse pump and the annex thereof of the active service malleation concentrated phase pneumatic ash removal system of main load transfer device with the storehouse pump, simplify pneumatic ash removal system, set the row powder flow of feed flow greater than the storage ash bucket, guarantee that the ash bucket high charge level can not occur storing up reports to the police, fly ash flows into ash conveying pipe under the effect of its deadweight and potential energy, add malleation to ash pipeline again and carry fly ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101266704A CN102285535A (en) | 2011-05-17 | 2011-05-17 | Safe energy-saving dynamic pneumatic ash handling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101266704A CN102285535A (en) | 2011-05-17 | 2011-05-17 | Safe energy-saving dynamic pneumatic ash handling system |
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| CN102285535A true CN102285535A (en) | 2011-12-21 |
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| CN2011101266704A Pending CN102285535A (en) | 2011-05-17 | 2011-05-17 | Safe energy-saving dynamic pneumatic ash handling system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795480A (en) * | 2012-08-29 | 2012-11-28 | 中国神华能源股份有限公司 | Compressed air water removal device and pneumatic ash conveying system |
| CN103274216A (en) * | 2013-06-24 | 2013-09-04 | 孙家鼎 | Cabin-pump-free numerical-control dense-phase pneumatic ash conveying system |
| CN106219247A (en) * | 2016-08-31 | 2016-12-14 | 无锡市华星电力环保修造有限公司 | A kind of flyash air-transport system with dedusting function |
| CN106542347A (en) * | 2017-01-18 | 2017-03-29 | 北京淮海电力科技有限公司 | Power plant denitration ash tapping equipment |
| CN107285039A (en) * | 2017-06-26 | 2017-10-24 | 华电电力科学研究院 | A kind of Pneumatic ash conveying method and device of thermal power plant's Level control |
| CN109092059A (en) * | 2018-07-23 | 2018-12-28 | 长兴旗滨玻璃有限公司 | A kind of denitration of glass furnace fume ammonia-spraying grid online ash removal device and its ash removal method |
-
2011
- 2011-05-17 CN CN2011101266704A patent/CN102285535A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102795480A (en) * | 2012-08-29 | 2012-11-28 | 中国神华能源股份有限公司 | Compressed air water removal device and pneumatic ash conveying system |
| CN103274216A (en) * | 2013-06-24 | 2013-09-04 | 孙家鼎 | Cabin-pump-free numerical-control dense-phase pneumatic ash conveying system |
| CN106219247A (en) * | 2016-08-31 | 2016-12-14 | 无锡市华星电力环保修造有限公司 | A kind of flyash air-transport system with dedusting function |
| CN106542347A (en) * | 2017-01-18 | 2017-03-29 | 北京淮海电力科技有限公司 | Power plant denitration ash tapping equipment |
| CN107285039A (en) * | 2017-06-26 | 2017-10-24 | 华电电力科学研究院 | A kind of Pneumatic ash conveying method and device of thermal power plant's Level control |
| CN109092059A (en) * | 2018-07-23 | 2018-12-28 | 长兴旗滨玻璃有限公司 | A kind of denitration of glass furnace fume ammonia-spraying grid online ash removal device and its ash removal method |
| CN109092059B (en) * | 2018-07-23 | 2021-02-05 | 长兴旗滨玻璃有限公司 | Online ash removal device and method for denitration ammonia-spraying grid of glass kiln flue gas |
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Application publication date: 20111221 |