CN102530558A

CN102530558A - Digital quantifying continuous energy ash conveying system

Info

Publication number: CN102530558A
Application number: CN2012100203007A
Authority: CN
Inventors: 孙家鼎
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-29
Filing date: 2012-01-29
Publication date: 2012-07-04

Abstract

Provided is a quantifying continuous energy ash conveying method of a digital quantifying continuous energy ash conveying system, and an existing batch-type ash conveying method of a warehouse pump type energy ash conveying system is changed. The digital quantifying continuous energy ash conveying system is characterized in that the ash conveying system starts operation when ash level of a dirt catcher ash storage hopper (1) achieves an upper level gage (2), the maximum ash discharge amount of the ash storage hopper serves as quantifying ash conveying amount of a rotating type pulverized coal conveyer (6) with an adjustable exhaust pipe (5), coal ash is stably pulled to a monitor flow type check valve device (7) being equipped with a gas balance pipe (8), the coal ash enters a slope tee joint pipe (9) with a nozzle after measurement and is conveyed to an ash conveying pipeline (12), when the ash level achieves a lower level gage (3), the ash conveying system suspends operation in order to control the ash conveying amount and save compressed air amount, and the ash conveying system is restarted when the ash level recovers to the upper level gage (2). The ash conveying method can avoid dangerous high-material-level of an ash storage bucket, maintains ash conveying to be safe and stable, and reduces ash conveying energy consumption and lightens abrasion.

Description

Digital quantitatively continuous Pneumatic ash conveying system

Technical field that the present invention belongs to

The present invention relates to a kind of defeated grey method of digital quantitatively continuous Pneumatic ash conveying system.

Prior art and background technology

The existing transferring technology in big-and-middle-sized coal-burning power plant nearly all is to adopt with the key equipment of storehouse pump as the Pneumatic ash conveying system, fails grey method this batch (-type) and exists some drawbacks; When dust exhaustor stores up ash bucket to storehouse pump dress ash, must the inlet valve of storehouse pump be opened, fly ash falls into the storehouse pump according to its deadweight; Treat to fail ash work preparation beginning after fly ash is filled the storehouse pump,, must inlet valve cut out elder generation for preventing to carry the pressurized air of fly ash to scurry into dust exhaustor; Fill the compression air to the storehouse pump again, fly ash is carried after being compressed the air fluidisation again, after the fly ash in the pump of storehouse is failed only; Just suspend and carry pressurized air, the inlet valve that repeats again to open the storehouse pump carries out defeated grey loop cycle next time to storehouse pump dress ash; Batch (-type) ground conveying technology has limited defeated grey ability, and pump also just individual secondary storage container in storehouse can not be monitored defeated ash amount; When conveying was exerted oneself less than the receipts of dust exhaustor ash ability, high charge level might appear in the ash position of storage ash bucket, causes the generation of serious accident; In addition, adopt the storehouse pump to make batch (-type) Pneumatic ash conveying technology, can not realize the stable defeated ash of quantitative continous way; Can not regulate and control ash-transmission system and carry more fly ash with the less air amount, can not Optimum Grey gas ratio, can not control the flow velocity of ash conveying pipe; Higher flow velocity makes the ash conveying pipe serious wear, in a word, existing defeated gray technology exist can not fail safely grey, can not be energy-conservation, many drawbacks such as pipe wear is serious.

The purpose of invention

The objective of the invention is to improve existing defeated gray technology; Avoid deduster storage ash bucket dangerous high charge level to occur, unsettled defeated ash is regulated to the defeated ash under the quantitative stable state, thereby but Optimum Grey gas ratio, the flow velocity that reduces ash conveying pipe alleviates wearing and tearing; And it is defeated grey that step defeated ash is changed into quantitative continous way; Improved defeated grey ability, adjustable Pneumatic ash conveying system can quantitatively move continuously, tries to achieve not only safety but also can reduce the Pneumatic ash conveying method of defeated grey energy consumption of ash-transmission system.

The technical scheme of invention

The objective of the invention is to realize through following measure: at dust exhaustor storage ash bucket (1) level-sensing device up and down is set, the ash position arrives when going up level-sensing device (2), opens maintenance insertion plate door (4); Open simultaneously and carry pressurized air (10) and blowdown pipe pressurized air (11), fly ash advances powder according to its deadweight to rotary type packing auger (6), through the uniform rotation of rotary type packing auger; Fly ash is dialled in the flow monitoring type non-return flap apparatus (7) that gas equalizing pipe (8) are housed reposefully, and fly ash gets into the bevel arm piece (9) of band nozzle after measuring, input ash conveying pipe (12); The rotating speed of regulation and control rotary type packing auger makes its maximum that is equal to or greater than dust exhaustor of exerting oneself receive the ash amount, quantitatively stably carries fly ash; Ensure that dust exhaustor storage ash bucket dangerous high charge level can not occur, the packing auger of rotation can be brought a spot of fluidized wind (5) into, helps flowing of fly ash; The structure of while rotary type packing auger; Can stop pressurized air upwards to scurry into dust exhaustor storage ash bucket, control rotary type packing auger is in quantitatively operation continuously and stably between the level-sensing device up and down, when the powder position arrives down level-sensing device (3); In order to save the quantitatively operation continuously of defeated grey energy consumption and rotary type packing auger; Suspend the rotary type packing auger and carry compressed-air actuated operation, wait to store up grey the measuring when running up to material level of storage of ash bucket, operation is restarted again automatically in digital quantitatively continuous Pneumatic ash conveying system.

The good effect that invention compared with prior art has

Existing defeated gray technology has following main drawback; The defeated grey ability of the quantitative continous way of the defeated off and on ash of nonnumeric formula is low; And can not reduce defeated grey energy consumption, can not avoid storing up ash bucket and dangerous high charge level occur, can not regulate and control the operating mode that ash-transmission system is in stabilizing energy-saving and move; Be easy to generate the stifled pump of fly ash, plugging accident, bring the economic loss that is difficult to estimate to power plant.

The quantitative method of continous way Pneumatic ash conveying can overcome the various drawbacks of traditional existing defeated gray technology, can accomplish safe, energy-conservation and alleviates wearing and tearing, and the service life etc. that prolongs ash conveying pipe is effect actively.

Explanation to accompanying drawing

Below in conjunction with accompanying drawing and embodiment, further explanation is done by digital quantitatively continuous Pneumatic ash conveying system.

Accompanying drawing is the scheme drawing of digital quantitatively continuous Pneumatic ash conveying system:

1. the bevel arm piece 10. of 3. times level-sensing devices of level-sensing device, 4. maintenance insertion plate doors, 5. adjustable freeing pipe 6. rotary type packing augers 7. flow monitoring type non-return flap apparatus 8. gas equalizing pipes 9. band nozzles is carried compressed air tube 11. blowdown pipes 12. ash conveying pipes on the dust exhaustor storage ash bucket 2.

Concrete embodiment

With the single-machine capacity is the electric dust exhaustor of 600MW coal-burning power plant, and the storage ash bucket of its I electric field generally is made up of 6-8 storage ash bucket, and the receipts ash amount of each storage ash bucket is inequality; But the method for digital quantitatively continuously Pneumatic ash conveying is identical, and existing is example with any storage ash bucket wherein, and the embodiment that it is concrete is described; The sidewall of dust exhaustor storage ash bucket (1) is equipped with level-sensing device (2) and following level-sensing device (3) in the accompanying drawing; The ash position of fly ash arrives when going up level-sensing device (2), opens the maintenance insertion plate door (4) of storage ash bucket outlet, and fly ash begins to fall into according to its deadweight from the storage ash bucket rotary type packing auger (6) and the flow monitoring type non-return flap apparatus (7) of adjustable rotating speed; With the maximum of this dust exhaustor storage ash bucket receive grey ability be quantitative continous way fail ash; Defeated grey ability so can not make the storage ash bucket produce dangerous high charge level, can keep operating condition stably simultaneously, can optimize the grey gas ratio of ash-transmission system on the one hand; Make defeated grey ability be controlled at energy-saving run under the maximum safe concentration; The may command ash conveying pipe has lower flow velocity on the other hand, alleviates the wearing and tearing of pipeline, when the ash position of the fly ash of storage in the ash bucket arrives down level-sensing device (3); In order to save air supply and the quantitative smooth operation that keeps ash-transmission system; Suspend the ash-transmission system operation of this storage ash bucket, the fly ash bit recovery of treating dust exhaustor storage ash bucket is during to last level-sensing device (2), and ash-transmission system restarts safety, stable, energy-saving run times without number again.

Claims

1. the defeated grey method of a digital quantitatively continuous Pneumatic ash conveying system is characterized in that: store up ash bucket (1) at dust exhaustor two level-sensing devices up and down are set, when level-sensing device (2) is gone up in an ash arrival; Open maintenance insertion plate door (4), open to carry compressed air tube (10) and blowdown pipe pressurized air (11), fly ash according to its deadweight to rotary type packing auger (6) powder that falls; The rotary type packing auger rotates evenly, and fly ash is dialled in the flow monitoring type non-return flap apparatus (7) that gas equalizing pipe (8) are housed reposefully, and fly ash gets into the bevel arm piece (9) of band nozzle after measuring; Be conveyed into ash conveying pipe (12), can bring a spot of fluidized wind (5) into, help flowing of fly ash with the rotation of rotary type packing auger; The constructional feature of while rotary type packing auger; Can stop pressurized air upwards to be scurried, control rotary type packing auger is in quantitative operation continuously between the material level up and down, for the defeated ash that makes defeated grey operating mode maintain maximum stable is measured quantitative energy-saving run down; When storage ash bucket powder position arrives level-sensing device (3); Suspend the rotary type packing auger and carry compressed-air actuated operation, when treating the powder bit recovery, restart again and carry the quantitatively operation continuously of pressurized air and rotary type packing auger to last material level.