CN105570920A - Flame return preventing device for feeding of boiler - Google Patents

Flame return preventing device for feeding of boiler Download PDF

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Publication number
CN105570920A
CN105570920A CN201510968780.3A CN201510968780A CN105570920A CN 105570920 A CN105570920 A CN 105570920A CN 201510968780 A CN201510968780 A CN 201510968780A CN 105570920 A CN105570920 A CN 105570920A
Authority
CN
China
Prior art keywords
feed
feeding
shaft
rotating shaft
rotating
Prior art date
Application number
CN201510968780.3A
Other languages
Chinese (zh)
Inventor
赵伟忠
徐建锋
胡炉林
Original Assignee
浙江中力热能股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 浙江中力热能股份有限公司 filed Critical 浙江中力热能股份有限公司
Priority to CN201510968780.3A priority Critical patent/CN105570920A/en
Publication of CN105570920A publication Critical patent/CN105570920A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K3/00Feeding or distributing of lump or pulverulent fuel to combustion apparatus
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23MCASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M11/00Safety arrangements
    • F23M11/02Preventing emission of flames or hot gases, or admission of air, through working or charging apertures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23KFEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2203/00Feeding arrangements
    • F23K2203/20Feeding/conveying devices

Abstract

The invention relates to the field of boilers, in particular to a flame return preventing device for feeding of a boiler. The flame return preventing device is provided with a fixing flange which is connected with a feed box. The lower portion of the fixing flange is connected with an upper connecting plate. The flame return preventing device comprises a first-stage feeding system and a second-stage feeding system. The first-stage feeding system and the second-stage feeding system are connected through an upper charging barrel and lower charging barrel connecting plate. Due to the facts that the included angles between rotary blades in the first-stage feeding system and an upper rotary shaft are 90 degrees and the included angles between a feeding port of an upper charging barrel in the system and a central spindle and between a discharging port of the upper charging barrel in the system and the central spindle are both smaller than 90 degrees, the discharging port is covered with at least two blades no matter what rotation positions the rotary blades are located in, the upper portion is completely isolated from the lower portion, and a flame return preventing function is achieved.

Description

A kind of boiler feeds fireproof tempering device

Technical field

The present invention is widely used in biomass-burning etc. and easily produces in the field of boilers of tempering fuel, specifically a kind of boiler feeds fireproof tempering device.

Background technology

Biomass-burning fuel boiler known at present, a part is without fireproof tempering device, what lean on is that boiler induced-draft fan gravitation produces negative pressure, and flame is pumped, and avoids the generation of hopper tempering, but this mode is very unreliable, main cause be boiler work one section along with dust deposit in flue, the reasons such as motor ages, negative pressure reduce, flame slowly can put propellant bottle, until spread to whole hopper; Another part has fireproof tempering device, in the middle of these fireproof tempering devices, is have function of preventing back-fire under negative pressure condition too, still can not stops tempering when pressurized firing; Another part fireproof tempering device is when pressurized firing, there is effective function of preventing back-fire, but the problem that this kind of fireproof tempering device still exists, is namely not suitable for miniature boiler, because this kind of disposable fuel that adds in burner hearth of fireproof tempering device is too many, and minimum discharge quantity not easily regulates, miniature boiler fire grate size is less, limited power capacity, and fuel can not Thorough combustion in time, the visible dense smoke of easy generation, uneconomical environmental protection.

Summary of the invention

The present invention aims to provide a kind of boiler feeds fireproof tempering device, solves existing biomass fired boiler combustion flame large, easy tempering, causes the problem of material burning in hopper, thus provides one can boiler anti-backfire, again can little amount of feeding uniform speed feeding device.

The present invention is achieved by the following technical solutions: a kind of boiler feeds fireproof tempering device, it is provided with the mounting flange be connected with hopper, upper junction plate is connected below described mounting flange, this device comprises one-level feed system and secondary feed system, described one-level feed system is connected by upper and lower barrel connecting plate with described secondary feed system, described one-level feed system comprises one-level feeding motor, the left end cap that upper barrel and described upper barrel both sides are arranged and right end cap, rotating vane and upper rotating shaft is established in described upper barrel, two end cap is by bearings rotating vane and upper rotating shaft, one end of described upper rotating shaft is connected by connecting shaft cover with one-level feeding motor, described one-level feeding motor is fixed on the first fixed head, described upper barrel is provided with feeding port and feed opening, described feed opening is communicated with the charging aperture of secondary feed system.

Further, described rotating vane is some, and uniform welding, on upper rotating shaft, is 90 ° of angles between rotating vane and upper rotating shaft.

Further, described rotating vane is four, is vertically welded on rotating shaft, and is uniformly distributed one week, and two rotating vanes are 90 °.

Further, described feeding port and upper rotating shaft angle are less than 90 °.

Further, described feed opening and upper rotating shaft angle are less than 90 °.

Further, the angle of described feeding port and upper rotating shaft is 50 ° to 70 °, and the angle of described feed opening and upper rotating shaft is 50 ° to 70 °.

Further, described secondary feed system comprises secondary feeding motor, helical blade in blanking tube and blanking tube and Shaft, described helical blade is fixed on Shaft, described Shaft is rotated by swivel bearing supporting, described swivel bearing is fixed in axle sleeve, described axle sleeve is fixed in blanking tube, the front end (namely towards secondary feeding motor bearing of trend) of described swivel bearing has been provided with the rigid bearing strengthening effect with one heart, one end of described Shaft is connected with secondary feeding motor by connecting shaft cover, described secondary feeding motor is fixed on the second fixed head.

The action of above-mentioned each parts controls by microcomputer control system is unified.Such as one-level feeding motor and secondary feeding motor all connect microcomputer control system.

This invention takes above-mentioned corrective measure to carry out, its beneficial effect is remarkable: the present invention is simple, compact and reasonable for structure; Be easy to arrange, requisite space is little, and manufacturing cost is lower, stable, do not get stuck, because one-level feeding screw blade has four, uniform welding is on upper rotating shaft, in 90 degree of angles, and the angle of upper barrel loading and unloading mouth and axle core is less than 90 degree, is generally 50-70 degree and is advisable.Namely rotating vane is regardless of on any position of rotation, has at least two panels blade to block feed opening, separates completely up and down, play anti-backfire effect, only have when being rotated by one-level blanking motor, fuel falls into feed opening between two blades, enters secondary feed system.Secondary feeding motor rotating speed as required promotes helical blade and rotates, and evenly fuel is pushed in burner hearth.The feeding amount often rotated a circle due to one-level feed system is the volume of upper barrel inner space, single feed amount is very large, and secondary feed system is on the basis that one-level feed system is expected really, the at the uniform velocity adjustable feeding burner hearth of material, when burner hearth sent into by the material that secondary feed system has little time one-level feed system to send here, one-level feed system rotating vane will go back to continuation blanking again unnecessary material, such one, the all adjustable feeding amount of secondary feeding motor, non-interference, feeding is even, feeding coal can be regulated according to boiler load, reduce operating cost, improve economic benefit.

Accompanying drawing explanation

Fig. 1 is the structural representation of the embodiment of the present invention 1;

Fig. 2 is the embodiment of the present invention 1 side view;

Fig. 3 is the embodiment of the present invention 1 top view.

In figure, 1 is one-level feeding motor, and 2 is first fixed heads, and 3 is secondary feeding motors, and 4 is second fixed heads, 5 is mounting flanges, and 61 is rotating vanes, and 62 is upper rotating shafts, 7 is upper and lower barrel connecting plates, and 81 is Shafts, and 82 is helical blades, 9 is blanking tubes, and 10 is rigid bearings, and 11 is swivel bearings, 12 is axle sleeves, and 13 is right end caps, and 14 is left end caps, 15 is connecting shaft covers, and 16 is upper junction plates, and 17 is upper barrels.

Detailed description of the invention

The present invention is further illustrated in conjunction with the embodiments to contrast accompanying drawing below:

Shown in Fig. 3, a kind of boiler feeds fireproof tempering device, comprises mounting flange, rotating vane, upper rotating shaft, upper barrel, left end cap, right end cap, upper and lower barrel connecting plate, blanking tube, helical blade, Shaft, axle sleeve, the first fixed head, connecting shaft cover, one-level feeding motor, secondary feeding motor, second fixed head, swivel bearing, rigid bearing.

This device is provided with the mounting flange 5 be connected with hopper, and mounting flange 5 is upper junction plate 16 below, has one-level feed system and secondary feed system below upper junction plate 16.

Upper junction plate 16 is fixed by welding on barrel 17, upper barrel 17 left and right sides has left end cap 14 and right end cap 13 respectively, right end cap 13 and left end cap 14 by screw-pressing on upper barrel 17, four rotating vanes 61 and upper rotating shaft 62 are fixed in the barrel 17 of sealing, centered by four rotating vane more than 61 rotating shafts 62, be welded on upper rotating shaft 62 with 90 ° of angles, and within 62 1 weeks, be uniformly distributed around upper rotating shaft, two end cap is by bearing supporting rotating vane 61 and upper rotating shaft 62, upper rotating shaft 62 one end and one-level feeding motor 1 overlap 15 by connecting shaft and combine, one-level feeding motor 1 is fixed on the first fixed head 2, more than be combined into one-level feed system.Wherein go up barrel 17 and be provided with feeding port and feed opening, feed opening is communicated with the charging aperture of secondary feed system, and feeding, discharge mouth and upper rotating shaft 62 angle are all less than 90 °.

Secondary feed system comprises blanking tube 9, helical blade 82 and Shaft 81, helical blade 82 is fixed on Shaft 81, Shaft 81 is supported by swivel bearing 11 and rotates, this bearing 11 is fixed in axle sleeve 12, the front end, left side of swivel bearing 11 has been provided with the rigid bearing 10 strengthening effect with one heart, and Shaft 81 one end is combined with secondary feeding motor 3 by connecting shaft cover 15, and secondary feeding motor is fixed on the second fixed head 4; One-level feed system and secondary feed system are welded and fixed by upper and lower barrel connecting plate 7 and are combined into feeding fireproof tempering device completely.

Biomass fuel first falls in upper junction plate by the hopper on mounting flange because of Action of Gravity Field, in space between two blades falling into rotating vane and upper rotating shaft again, one-level feeding machine operation rotarily drives rotating vane and upper rotating shaft, when burning rotates to bottom, fuel between two blades falls into secondary feed system again, in one-level feed system, upper barrel is upper, feed opening opening is about 50-70 degree, and the angle between blade is 90 degree, therefore when rotating vane rotates to any position, barrel upper and lower opening is all in the angle of blade, namely have at least two blades that barrel top and the bottom are separated completely, play anti-backfire effect.

When fuel arrives secondary feed system, secondary feeding machine operation rotarily drives helical blade and fuel is sent in burner hearth, the feeding amount often rotated a circle due to one-level feed system is the volume of upper barrel inner space, single feed amount is very large, and secondary feed system is on the basis of one-level feed system feeding, again adjustable for fuel average rate feeding burner hearth, when burner hearth sent into by the material that secondary feed system has little time one-level feed system to send here, one-level feed system rotating vane goes back to continuation blanking again unnecessary material, such one, the all adjustable feeding amount of secondary feeding motor, non-interference, when boiler load is larger, secondary feeding motor speed suitably strengthens, improve feeding amount, when boiler load is less, motor speed suitably reduces, with little amount of feeding feeding.Do full combustion of fuel, smokeless or few cigarette.

That more than enumerates is only specific embodiments of the invention, obviously, the invention is not restricted to above embodiment, all distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, and all should belong to protection scope of the present invention.

Claims (7)

1. a boiler feeds fireproof tempering device, it is provided with the mounting flange be connected with hopper, upper junction plate is connected below described mounting flange, it is characterized in that, this device comprises one-level feed system and secondary feed system, described one-level feed system is connected by upper and lower barrel connecting plate with described secondary feed system, described one-level feed system comprises one-level feeding motor, the left end cap that upper barrel and described upper barrel both sides are arranged and right end cap, rotating vane and upper rotating shaft is established in described upper barrel, two end cap is by bearings rotating vane and upper rotating shaft, one end of described upper rotating shaft is connected by connecting shaft cover with one-level feeding motor, described one-level feeding motor is fixed on the first fixed head, described upper barrel is provided with feeding port and feed opening, described feed opening is communicated with the charging aperture of secondary feed system.
2. boiler feeds fireproof tempering device according to claim 1, it is characterized in that, described rotating vane is some, and uniform welding is on upper rotating shaft, and rotating vane and upper rotating shaft are 90 ° of angles.
3. boiler feeds fireproof tempering device according to claim 2, it is characterized in that, described rotating vane is four, is vertically welded on rotating shaft, and is uniformly distributed one week, and two rotating vanes are 90 °.
4. boiler feeds fireproof tempering device according to claim 3, is characterized in that, described feeding port and upper rotating shaft angle are less than 90 °.
5. boiler feeds fireproof tempering device according to claim 3, is characterized in that, described feed opening and upper rotating shaft angle are less than 90 °.
6. the boiler feeds fireproof tempering device according to claim 4 or 5, is characterized in that, the angle of described feeding port and upper rotating shaft is 50 ° to 70 °, and the angle of described feed opening and upper rotating shaft is 50 ° to 70 °.
7. boiler feeds fireproof tempering device according to claim 1, it is characterized in that, described secondary feed system comprises secondary feeding motor, helical blade in blanking tube and blanking tube and Shaft, described helical blade is fixed on Shaft, described Shaft is rotated by swivel bearing supporting, described swivel bearing is fixed in axle sleeve, described axle sleeve is fixed in blanking tube, the front end, left side of described swivel bearing has been provided with the rigid bearing strengthening effect with one heart, one end of described Shaft is connected with secondary feeding motor by connecting shaft cover, described secondary feeding motor is fixed on the second fixed head.
CN201510968780.3A 2015-12-22 2015-12-22 Flame return preventing device for feeding of boiler CN105570920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510968780.3A CN105570920A (en) 2015-12-22 2015-12-22 Flame return preventing device for feeding of boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510968780.3A CN105570920A (en) 2015-12-22 2015-12-22 Flame return preventing device for feeding of boiler

Publications (1)

Publication Number Publication Date
CN105570920A true CN105570920A (en) 2016-05-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109140520A (en) * 2018-06-26 2019-01-04 浙江中力工具制造有限公司 Interval feeding type anti-backfire feeding device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783424A2 (en) * 2005-11-02 2007-05-09 Hollensen Energy A/S A biomass transport system and a bio fuel firing plant
CN201852124U (en) * 2010-10-09 2011-06-01 乔海祥 Biomass smoke and fire prevention feeder
CN203478302U (en) * 2013-08-08 2014-03-12 衡阳市大成锅炉有限公司 Tempering-preventing feeder
CN204460266U (en) * 2015-01-08 2015-07-08 东莞市淳元通用机械设备有限公司 The secondary pay-off of combustor
CN204678321U (en) * 2015-05-29 2015-09-30 田罕珍 A kind of biologic grain burning flame furnace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1783424A2 (en) * 2005-11-02 2007-05-09 Hollensen Energy A/S A biomass transport system and a bio fuel firing plant
CN201852124U (en) * 2010-10-09 2011-06-01 乔海祥 Biomass smoke and fire prevention feeder
CN203478302U (en) * 2013-08-08 2014-03-12 衡阳市大成锅炉有限公司 Tempering-preventing feeder
CN204460266U (en) * 2015-01-08 2015-07-08 东莞市淳元通用机械设备有限公司 The secondary pay-off of combustor
CN204678321U (en) * 2015-05-29 2015-09-30 田罕珍 A kind of biologic grain burning flame furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109140520A (en) * 2018-06-26 2019-01-04 浙江中力工具制造有限公司 Interval feeding type anti-backfire feeding device

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Application publication date: 20160511