CN202508624U

CN202508624U - Digital quantitative continuous pneumatic ash conveying system

Info

Publication number: CN202508624U
Application number: CN201220028915XU
Authority: CN
Inventors: 孙家鼎
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-01-29
Filing date: 2012-01-29
Publication date: 2012-10-31
Anticipated expiration: 2022-01-29

Abstract

The utility model discloses a quantitative continuous pneumatic ash conveying method for a digital quantitative continuous pneumatic ash conveying system. An intermittent ash conveying method for the conventional pump type pneumatic ash conveying system is replaced. The quantitative continuous pneumatic ash conveying method is mainly technically characterized in that the ash conveying system starts running when an ash level of an ash storage hopper (1) of a dust collector reaches an upper level indicator (2), the maximum ash discharge capacity of the ash storage hopper is taken as the fixed ash conveying capacity of a rotating pulverized coal conveyor (6) with an adjustable exhaust pipe (5), fly ash is stably stirred into a flow monitoring type check valve device (7) with an air balancing pipe (8), is measured, enters an inclined three-way pipe (9) with a nozzle, and is conveyed into an ash conveying pipeline (12), and the ash conveying system temporarily stops running to control the fixed ash conveying capacity and save compressed air when the ash level reaches a lower level indicator (3), and is restarted when the ash level is recovered to the upper level indicator (2). By the ash conveying method, the ash storage hopper can be prevented from a dangerous high ash level, ash conveying safety and stability are maintained, ash conveying energy consumption is lowered, and abrasion is alleviated.

Description

Digital quantitatively continuous Pneumatic ash conveying system

Technical field

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

Background technology

The ash-transmission system of big-and-middle-sized coal-burning power plant; Nearly all be to adopt with the key equipment of storehouse pump as the Pneumatic ash conveying system; The digital ash-transmission system of this ash-transmission system right and wrong; Can not monitor the feed flow of ash-transmission system, thereby can not regulate and control the technical parameter of ash-transmission system, cause existing defeated gray technology to exist can not fail safely grey, be difficult to accomplish many drawbacks such as energy-conservation, pipe wear is serious.

The utility model content

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; But thereby 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 of defeated grey energy consumption of ash-transmission system.In dust exhaustor storage ash bucket (1), level-sensing device (2) and following level-sensing device (3) are set; The maintenance insertion plate door (4) of contacting successively and using when a confession maintenance is installed at storage ash bucket lower part outlet place; It is equipped with the rotary type packing auger of the adjustable freeing pipe (5) that rotary type packing auger (6) is connected with the storage ash bucket down; One of close-coupled can be locked the flow monitoring type non-return flap apparatus (7) of gas and monitoring powder flow and supervision powder flow regime in the exit of rotary type packing auger; Fly ash advances powder according to its deadweight to rotary type packing auger (6); Rotate through rotary type packing auger constant speed; The fly ash continuous and quantitative is dialled in the flow monitoring type non-return flap apparatus (7) that gas equalizing pipe (8) are housed, and fly ash gets into the bevel arm piece (9) of band nozzle after measuring, input ash conveying pipe (12); On the bevel arm piece of being with nozzle, be connected to respectively and carry pressurized air (10) and blowdown pipe pressurized air (11) fly ash after measuring, to get into the bevel arm piece (9) and the input ash conveying pipe (12) of band nozzle, on the bevel arm piece of band nozzle, be connected to the conveying pressurized air (10) of conveying fly ash and the defeated grey pressurized air of blowdown pipe (11) respectively and accomplish the task of carrying fly ash.

Description of drawings

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 8 storage ash buckets, 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. digital quantitatively continuously Pneumatic ash conveying system; It is characterized in that: in dust exhaustor storage ash bucket (1), level-sensing device (2) and following level-sensing device (3) are set; Contact successively at storage ash bucket lower part outlet place a maintenance insertion plate door (4) is set; It is equipped with the rotary type packing auger of the adjustable freeing pipe (5) that rotary type packing auger (6) is connected with ash bucket down; One of close-coupled can be locked the flow monitoring type non-return flap apparatus (7) of gas and monitoring powder flow and supervision powder flow regime in the exit of rotary type packing auger; Fly ash advances powder according to its deadweight to rotary type packing auger (6), rotates through rotary type packing auger constant speed, the fly ash continuous and quantitative is dialled in the flow monitoring type non-return flap apparatus (7) that gas equalizing pipe (8) are housed; Fly ash gets into the bevel arm piece (9) of band nozzle after measuring; Import ash conveying pipe (12), on the bevel arm piece of band nozzle, be connected to respectively and carry pressurized air (10) and blowdown pipe pressurized air (11) fly ash after measuring, to get into the bevel arm piece (9) and the ash conveying pipe (12) of band nozzle, on the bevel arm piece of band nozzle, be connected to the conveying pressurized air (10) of conveying fly ash and the defeated grey pressurized air of blowdown pipe (11) respectively and accomplish the task of carrying fly ash.