A kind of compound soot blower system in low-temperature flue gas waste heat recovery system
Technical field
The present invention relates to a kind of compound soot blower system in low-temperature flue gas waste heat recovery system, in particular to the compound soot blower system that high-strength acoustic wave ash ejector combines with mechanical vibrator, low-temperature flue gas waste heat can be solved and reclaim the serious problem of heat exchanger dust stratification, and low-temperature flue gas restored acid dew point corrosion problem can be solved, belong to field of energy-saving technology
Background technology
Current, flue gas loss is the main factor of all kinds of boiler, kiln heat loss, and along with the raising of awareness of saving energy and rising steadily of energy prices, making full use of fume afterheat becomes the important channel of improving the boiler controller system thermal efficiency, realizing Waste Heat Reuse.But in prior art, common waste-heat recovery device exists that dust stratification is serious, cold end corrosion problem usually, particularly when waste-heat recovery device is arranged on after deduster or when dust content in flue gas is many, wall obtains dust stratification amount very large, when depending merely on a certain soot-blowing mode ash disposal, effect is very not obvious.Too much dust stratification not only causes air-introduced machine load to increase the weight of, and heat exchanger heat exchange efficiency is declined, have impact on the recovery of waste heat, but also cause serious cold end corrosion, and time serious, affect the normal operation of steam generator system, energy-saving effect reduces greatly.
Summary of the invention
For above-mentioned residual neat recovering system Problems existing, the object of the invention is to overcome the deficiency that existing low-temperature flue gas waste heat reclaims heat exchanger, provide a kind of compound soot blower system in low-temperature flue gas waste heat recovery system, be have that sonic soot blowing combines with mechanical ashing meet soot blower system, can be used for the ash disposal of flue gas waste heat recovery apparatus under low temperature height dirt environment.
The present invention is achieved by the following technical solutions:
A compound soot blower system in low-temperature flue gas waste heat recovery system, comprises flue gas waste heat recovery apparatus, is provided with sound wave soot blowing system in the porch of flue gas waste heat recovery apparatus, is provided with mechanical rapping cleaning dust system in the exit of flue gas waste heat recovery apparatus.
Described sound wave soot blowing system comprises compressed air preparation system, compressed air preparation system by set gradually compressed air strainer valve, stop valve, pneumatic control valve pipeline be connected with sound wave generating device, sound wave generating device connects sound wave amplifying device.
Described ripple amplifying device is arranged on the flue internal protecting wall of flue gas waste heat recovery apparatus.Acoustic wave ash ejector switch board is provided with between described pneumatic control valve and sound wave generating device.The automatic control to sonic generator can be realized.
Described mechanical rapping cleaning dust system comprises variable-frequency motor, variable-frequency motor is connected with rotating shaft by decelerator, transmission mechanism, rotating shaft is provided with multiple beater, the direction that beater waves is provided with can the drive link of rapping, drive link is connected with vibration connecting plate by inner vibrating rod, vibrates connecting plate and in succession the panel-pipe of heating surface of flue gas waste heat recovery apparatus.
Be provided with vibration dust-cleaning motor bearing seat bottom described variable-frequency motor, below rotating shaft, be provided with rotating shaft support framework.
Described sound wave soot blowing system welds or Flange joint with flue gas waste heat recovery apparatus shell.
Acoustic wave ash ejector switch board is to realize the operation of compressed air preparation facilities and sonic generator and to stop controlling.
In described sound wave soot blowing system, the junction of compressed air preparation system and pipeline is provided with check-valves and strainer valve, pipeline moves valve with sonic generator junction by electricity (gas), and the dynamic valve of electricity (gas) is connected the automatic control that can realize sound wave generating device with acoustic wave ash ejector switch board.
In described sound wave soot blowing system, pipe-line system can connect several branch road, the quantity of branch road calculates according to the concrete condition of blowing ash to be determined, each branch road and pipe-line system junction are provided with stop valve.
Beater is arranged in rotating shaft by certain angle, ensures beater rapping drive link according to a certain order, and then to reach be panel-pipe of heating surface vibration, removes the object of dust stratification.
In described mechanical rapping cleaning dust system, control system can adjust the frequency of variable-frequency motor as the case may be, be the vibration frequency of heating surface remain on 1 ~ 6 beat/min in scope.
High-strength sound wave soot blowing system and mechanical rapping cleaning dust system are as two parts of low-temperature flue gas waste heat retracting device system, both separate, have respective control system, installation site; Mutually supplement again, mechanical vibrator can be removed the dust stratification that sonic soot blowing is difficult to closely knit dust stratification and the heat exchanger tube lee face removed.Both cooperatively interact, and have both played acoustic wave ash ejector and have blown ash comprehensively advantage, embody again the power consumption of mechanical rapping cleaning dust device few, remove the strong advantage of closely knit dust stratification ability.Under the effect of this compound soot blower system, the dust stratification of heated surface bundle obtains effective removing, and the coefficient of heat transfer greatly improves, and effectively raises the efficiency of waste-heat recovery device.
Accompanying drawing explanation
Fig. 1 is compound soot blower system scheme of installation of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the system schematic of sound wave soot blowing system.
Fig. 4 is mechanical rapping cleaning dust system schematic;
Fig. 5 is A-A direction view in Fig. 4;
Wherein, 1, sound wave soot blowing system; 2, flue gas waste heat recovery apparatus; 3, mechanical rapping cleaning dust system; 4, compressed air preparation system; 5, compressed air strainer valve; 6, stop valve; 7, pneumatic (electronic) control valve; 8, sound wave generating device; 9, sound wave amplifying device; 10, furnace wall; 11, acoustic wave ash ejector switch board; 12, vibration dust-cleaning motor bearing seat; 13, variable-frequency motor; 14, decelerator; 15, transmission mechanism; 16, rotating shaft support framework; 17, rotating shaft; 18, beater; 19, drive link; 20, sealing device; 21, inner vibrating rod; 22, connecting plate is vibrated.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated.
A kind of compound soot blower system in low-temperature flue gas waste heat recovery system, comprise flue gas waste heat recovery apparatus 2, be provided with sound wave soot blowing system 1 in the porch of flue gas waste heat recovery apparatus 2, be provided with mechanical rapping cleaning dust system 3 in the exit of flue gas waste heat recovery apparatus 2.
Sound wave soot blowing system adopts interval to blow ash, has intensity high, the feature of broad covered area, the flue dust of waste-heat recovery device inlet tube row and the sound wave area of coverage can be blown down; Mechanical rapping cleaning dust system layout, in waste-heat recovery device exit, gives the mechanical oscillation of panel-pipe of heating surface by rapping apparatus, reach the deashing object removing the region that heating surface tube end exhausting part dust stratification and acoustic wave ash ejector can not cover.
Sound wave soot blowing system 1 comprises compressed air preparation system 4, compressed air preparation system 4 by set gradually compressed air strainer valve 5, stop valve 6, pneumatic control valve 7 pipeline be connected with sound wave generating device 8, sound wave generating device 8 connects sound wave amplifying device 9.Sound wave amplifying device 9 is arranged on the flue internal protecting wall 10 of flue gas waste heat recovery apparatus 2.Acoustic wave ash ejector switch board 11 is provided with between described pneumatic control valve 7 and sound wave generating device 8.The automatic control to sound wave generating device 8 can be realized.
The compressed air come by compressed air preparation system during operation arrives sound wave generating device by compressed air strainer valve, stop valve, pneumatic control valve, be high strength sound wave by sound wave generating device by the power conversion entrained by compressed air, high strong sound wave is after sound wave amplifying device amplifies, be released in the flue before waste-heat recovery device, grey particle and air molecule is made to produce vibration by the active force of sound wave, destroy and stop grey particle to combine at heat exchange surface, make it to be in suspension fluidization state, so that flue gas or gravity are taken away, complete and blow grey process.The ash-removal effect of the cycle of operation machine vision ash removal equipment for flapping of sound wave soot blowing system is determined.
Described mechanical rapping cleaning dust system comprises variable-frequency motor 13, variable-frequency motor 13 is connected with rotating shaft 17 by decelerator 14, transmission mechanism 15, rotating shaft 17 is provided with multiple beater 18, the direction that beater 18 waves is provided with can the drive link 19 of rapping, drive link 19 is connected with vibration connecting plate 22 by inner vibrating rod 21, and vibration connecting plate 22 is ined succession the panel-pipe of heating surface of flue gas waste heat recovery apparatus 2.
During operation, variable-frequency motor drives axis of rotation, makes beater rapping drive link successively, and the vibration passing of beater is given inner vibrating rod by drive link, and inner vibrating rod makes panel-pipe of heating surface vibrate by vibration connecting plate, reaches the object of ash disposal.Rotating shaft average minute clock rotates 1 ~ 6 circle, makes heating surface rapping per minute just can obtain good dedusting effect 1 ~ 6 time.
Described acoustic wave ash ejector switch board by the control to gas (electricity) brake control valve, and by control signal teletransmission to DCS system, can realize the Long-distance Control to sound wave soot blowing system.The simultaneously control of vibration dust-cleaning system variable-frequency motor also can be located in sound wave controlled cabinet and to realize teletransmission, reaches the collaborative of whole system.