CN2331851Y

CN2331851Y - Low-frequency acoutic-wave boiler soot-blowing, coke-knocking combustion-support device

Info

Publication number: CN2331851Y
Application number: CN 97221182
Authority: CN
Inventors: 魏浩鹏; 魏玉洁
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-16
Filing date: 1997-07-16
Publication date: 1999-08-04
Anticipated expiration: 2007-07-16

Abstract

The utility model relates to a low-frequency sound wave soot-blowing coke-removing combustion-supporting device for boilers, which is used for various boilers. The utility model comprises a motor, a heat insulating shaft coupling, a main shaft with a special structure, a sounding cavity, an air inlet, a sound outlet, a double supporting structure for the rotor of the main shaft, a favorable self-lubricating sliding bearing, and a closed graphite packing sealing system. The utility model can continuously prevent and remove soot deposits and cokes on heating surfaces effectively in the process of boiler operation, so that the heat transfer of boilers is speeded up, the boiler efficiency is enhanced, the safe running of boilers can be guaranteed. The utilization of the low-frequency sound wave soot-blowing coke-removing combustion-supporting device is a good way for energy saving for thermoelectric enterprises.

Description

Low-frequency sound wave boiler soot-blowing coke-knocking combustion-support device

The utility model belongs to mechanical field, especially for the low-frequency sound wave boiler soot-blowing coke-knocking combustion-support device of various boilers.

Making boiler keep the conventional method of heating surface cleaning is to adopt mechanical type waterpower soot blower, telescopic steam sootblower and fixing rotary steam sootblower, these soot blower ubiquities machinery bite, hot advance and retreat difficulties, blows problems such as decreasing heating surface so that boiler booster.In recent years, utilize Principles of Acoustics to remove the technology of various boiler heat-exchanger superficial dust coking in test and application, many relevant patents are arranged both at home and abroad, these patents are generally by compositions such as motor, shaft coupling, major axis rotor, transducing chamber, supporting members, working media utilizes compressed air and superheated steam, modulate air-flow to produce sound wave by the rotor sleeve cutting that is fixed on the axle, sound wave is sent into boiler body to reach the purpose of blowing ash by acoustic waveguide tube.It is the infrasound boiler ash removal device of the energy with the superheated steam that Chinese patent " is the infrasound boiler ash removal device of the energy with steam " (ZL90216051.6) discloses a kind of, the favorable mechanical design is all arranged aspect, sealing stressed, lubricated at machine, the motor cooling, but the infrasound frequency range is influential to human body, and still have mechanical bite in actual applications, the problem of motor burning, bearing lubrication and steam leakage.

The purpose of this utility model is at the defective of prior art and a kind of low-frequency sound wave boiler soot-blowing coke-knocking combustion-support device of not enough proposition, the energy that steam or compressed air are carried is converted into the high sound intensity sound wave by this device, send into boiler body by acoustic waveguide tube, in stove, set up balanced energy field, the sound wave active force makes grey particle and air molecule produce vibration, destruction and prevention grey particle are in heat-exchanger surface or interparticle combination, make it to be in all the time the suspension fluidized state, it is taken away by flue gas or gravity.Under the high-energy effect of low-frequency sound wave, dust can not gather, and can stop the growth of cinder effectively.The disturbance of sound wave in burner hearth, the combination of having accelerated between the carbon oxygen molecule is fully burnt it, quickens heat transmission, plays combustion-supporting effect.

The purpose of this utility model is achieved through the following technical solutions.

A kind of low-frequency sound wave boiler soot-blowing coke-knocking combustion-support device, it comprises motor (1), shaft coupling (2), main shaft (4), sounding chamber (13), sound outlet (14), air inlet (17), support (18) and base (19), it is characterized in that main shaft (4) is welded to form by three parts, its left end is a hollow pipe, right half is solid circular shaft, position corresponding to sounding chamber (13) is a cylindric rotor, communicate with the left end hollow pipe, three parts keep strict concentric, the left end in sounding chamber (13) has left end cap (15), be connected with sounding chamber (13) by 4～6 set bolts (20), the right-hand member in sounding chamber (13) has right end cap (7), be connected with sounding chamber (13) by 4～6 set bolts (20), and at areola of sounding chamber (13) the right formation, air inlet (17) is welded on the left end cap (15), sound outlet (14) is welded on the big re-entrant portion in sounding chamber (13), the left end of main shaft (4) is a hollow pipe, be connected with air inlet (17), the big re-entrant portion of main shaft (4) in sounding chamber (13) is cylindric rotor, have circular port on the rotor wall, main shaft (4) is realized double supporting structure by the tubular sliding bearing (16) and the end cap sliding bearing (8) on the right end cap (7) that are fixed on the left end cap (15), the solid section that main shaft (4) is positioned at areola is with shaft shoulder pressure ring (9), compress end cap sliding bearing (8), realize end cap seal, the solid section that main shaft (4) is positioned at areola also is with one-level graphite grazing filler (12), it is compressed by bolt (21) by gland (10), realize primary seal, the residual gas that is positioned at areola that primary seal leaks is drawn this device from dredging gas port (11), the right inner chamber of right end cap (7) and main shaft (4) solid section form stuffing-box, insert secondary graphite grazing filler (6) in the letter, sealing gland (5) compresses secondary graphite grazing filler (6) by 4～6 bolts (22), realize secondary seal more completely, main shaft (4) is connected with motor (1) by heat-insulating type shaft coupling (2), fan (3) is fixed on the side of shaft coupling (2) near motor, rotates synchronously with main shaft (4).

The circular port that main shaft (4) is left on the rotor wall of the cylindric rotor at position, sounding chamber (13) has n, n=1～4, and the aperture of circular port is close with the internal diameter of sound outlet (14).

Fig. 1 is a structural representation of the present utility model.

Embodiment:

Below in conjunction with accompanying drawing concrete structure of the present utility model and embodiment are described in detail.

By the motor (1) of adjustable speed by having the heat insulation shaft coupling (2) of fan (3), driving main shaft (4) rotates, the left end of main shaft (4) is a hollow tubular, be connected with air inlet (17), the big re-entrant portion of main shaft (4) in sounding chamber (13) is the tubular rotor, have two circular ports on the rotor wall, symmetric arrangement, the diameter of circular port is close with the diameter of sound outlet (14), when main shaft (4) rotated, rotor cut modulating gas stream in sounding chamber (13), cause the cyclically-varying of air-flow by the variation of circular port perforate, produce low-frequency sound wave, enter boiler body from sound outlet (4).Sounding chamber (13) is connected with right end cap (7) with left end cap (15) by set bolt (20), and the three is fixed on the base (19) by support (18).Main shaft (4) is realized double supporting structure by the tubular sliding bearing (16) and the end cap sliding bearing (8) on the right end cap (7) that are fixed on the left end cap (15), when the tubular rotor portion of main shaft (4) is rotated in sounding chamber (13), the radial force equilibrium does not exist axial force to make the phenomenon of the tubular rotor and sounding chamber (13) bite of main shaft (4).Sliding bearing (16) and end cap sliding bearing (8) choice of powder metallurgical material are made, and realize self-lubricating by the material of bearing own, must add lubricating grease for a short time.When gas passed through, gas pressure compressed end cap sliding bearing (8) by shaft shoulder pressure ring (9), realizes good end cap seal.This device seals by the twice graphite packing, and has used gas leakage to dredge gas port (11) between two seals, and the residual gas that leaks in areola is drawn this device by dredging gas port (11).Left side sealing comprises and one-level graphite grazing filler (12) by bolt (21) it is compressed by gland (10), realizes primary seal, and the residual gas that is positioned at areola that primary seal leaks is drawn from thin gas port (11).The right inner chamber of right end cap (7) and main shaft (4) solid section form stuffing-box, insert secondary graphite grazing filler (6) in the letter, and sealing gland (5) compresses it by bolt (22), and bolt (22) can be regulated at any time, thereby realizes good secondary seal.

Advantage of the present utility model and result of use are as follows:

Because the wavelength of low-frequency sound wave is longer, decay is slow, is suitable for the acoustic energy transmission, with ball The low-frequency sound wave that the ground roll form is propagated has the strong characteristics of diffracting power, can be limited at boiler Produce reverberation in the space, deashing is omnibearing. Because the refraction diffracting power of sound wave makes Blow ash and do not stay the dead band, dead angle; Safe and reliable to operation, easy and simple to handle, maintenance workload is little, joint The human-saving material resources; With boiler synchronous operation, keep clean continuously, improve boiler thermal output; This device does not have any harmful effect to boiler and human body. This device can use compressed air, steaming Vapour etc. are as source of the gas.

This device can be applicable to different model big-and-middle of rated capacity 65t/h～2000t/h On the miniature boiler, in boiler running process, the fouling of heating surface knot is removed on continuous effective ground Jiao has accelerated hot transmission, has improved boiler efficiency, stops and removing fouling of heating surface knot Jiao guarantees the safe operation of boiler, increases economic efficiency, and using this device is thermoelectric enterprise The good approach that industry is energy-saving and cost-reducing.

Claims

1. low-frequency sound wave boiler soot-blowing coke-knocking combustion-support device, it comprises motor (1), shaft coupling (2), main shaft (4), sounding chamber (13), sound outlet (14), air inlet (17), support (18) and base (19), it is characterized in that main shaft (4) is welded to form by three parts, its left end is a hollow pipe, right half is solid circular shaft, position corresponding to sounding chamber (13) is a cylindric rotor, communicate with the left end hollow pipe, three parts keep strict concentric, the left end in sounding chamber (13) has left end cap (15), be connected with sounding chamber (13) by 4～6 set bolts (20), the right-hand member in sounding chamber (13) has right end cap (7), be connected with sounding chamber (13) by 4～6 set bolts (20), and at areola of sounding chamber (13) the right formation, air inlet (17) is welded on the left end cap (15), sound outlet (14) is welded on the big re-entrant portion in sounding chamber (13), the left end of main shaft (4) is a hollow pipe, be connected with air inlet (17), the big re-entrant portion of main shaft (4) in sounding chamber (13) is cylindric rotor, have circular port on the rotor wall, main shaft (4) is realized double supporting structure by the tubular sliding bearing (16) and the end cap sliding bearing (8) on the right end cap (7) that are fixed on the left end cap (15), the solid section that main shaft (4) is positioned at areola is with shaft shoulder pressure ring (9), compress end cap sliding bearing (8), realize end cap seal, the solid section that main shaft (4) is positioned at areola also is with one-level graphite grazing filler (12), it is compressed by bolt (21) by gland (10), realize primary seal, the residual gas that is positioned at areola that primary seal leaks is drawn this device from dredging gas port (11), the right inner chamber of right end cap (7) and main shaft (4) solid section form stuffing-box, insert secondary graphite grazing filler (6) in the letter, sealing gland (5) compresses secondary graphite grazing filler (6) by 4～6 bolts (22), realize secondary seal more completely, main shaft (4) is connected with motor (1) by heat-insulating type shaft coupling (2), fan (3) is fixed on the side of shaft coupling (2) near motor, rotates synchronously with main shaft (4).

2. device according to claim 1 is characterized in that the circular port that described main shaft (4) is opened has n on the rotor wall of the cylindric rotor at position, sounding chamber (13), n=1～4, and the aperture of circular port is close with the internal diameter of sound outlet (14).