CN117450525A - Acoustic wave soot blower with positive pressure type anti-blocking function - Google Patents

Abstract

The invention relates to the technical field of soot blowing equipment, and discloses an acoustic soot blower with a positive pressure type anti-blocking function, which comprises a sound source assembly, a flange plate group and an acoustic wave conduction assembly which are sequentially communicated; the sound wave conduction assembly comprises a horn body, an interlayer cylinder and a shell which are coaxially sleeved and are provided with clearance spaces; the shell is cylindrical and is positioned on the outermost layer, and one end of the shell is fixedly connected to one side of the flange plate group; the interlayer cylinder is an arc cone cylinder and is positioned between the horn body and the shell, and comprises an air inlet end and an air outlet end, wherein the air inlet end is fixedly connected to one side of the flange plate group, and the air outlet end is fixedly connected with the shell at the other end close to the shell; the horn body comprises a small end and a large end, and the small end is fixedly connected to one side of the flange plate group; the flange plate component is provided with a plurality of through holes which are aligned with the air inlet end of the interlayer cylinder and are used for forming rotational flow air pressure; the closed space and the rotational flow space formed effectively prevent suspended matters from entering dead angles of the shell to cause accumulation and blockage, and the sounding efficiency is improved.

Description

Acoustic wave soot blower with positive pressure type anti-blocking function

Technical Field

The invention relates to the technical field of soot blowing equipment, in particular to an acoustic soot blower with a positive pressure type anti-blocking function.

Background

In the production operation process of the boiler, heating surfaces of the boiler are as follows: the surface area ash and slag formation of water-cooled walls, superheaters, economizers, preheaters, flues and the like are serious, and are a problem which is difficult to solve for a long time and puzzled in production. It not only weakens the heat transfer of the heating surface of the boiler, so that the heat efficiency of the boiler is reduced, but also can cause unexpected furnace shutdown and serious economic loss when the ash and slag are seriously formed in the heating surface. At present, most boilers are provided with steam soot blowers, compressed air soot blowers, steel ball soot blowers and the like, but the traditional soot blowers have the defects of limited soot blowing range, dead angle, high energy consumption, high maintenance cost, inconvenient operation and the like in terms of operation and performance, and have very low utilization rate and are not used in a plurality of standstill. Therefore, a low-frequency sound wave ash removing technology (namely a sound wave ash blower) for the boiler is generated, sound waves are emitted by the sound wave ash blower through a specific horn-shaped sound emitting structure and are input into a closed space to be ash removed, so that the ash removing function is exerted, the application is wide, and a good effect is achieved.

But the sound wave soot blower is in the application in-process, because the ambient temperature that is located is high, the sound wave frequency that sound production cavity sent is higher, the noise that produces is big, horn body simple structure and fragile, the sound pressure level that sends is lower, and unstable, consequently, need carry out thermal-insulated and sound insulation to the sound wave soot blower, protect the horn body simultaneously, the general practice increases the casing in the loudspeaker outside of sound wave soot blower sound transmission pipe, there is the clearance space between casing and the horn body, under this kind of circumstances, because the sound wave soot blower air supply pressure is low in the course of the work, and boiler reactor internal pressure is big, cause the negative pressure to make the floating deposit get into the sound wave soot blower inside and cause the jam, influence soot blowing efficiency.

Based on the problems, the conventional method is to enhance the air pressure in the inner cavity of the horn body, and a glass wool heat insulation layer is added between the shell and the horn body, so that the problem of blockage can be solved, but after the glass wool is heated at high temperature, harmful gas can be emitted, the health of field personnel is endangered, and other materials with high temperature resistance and good heat insulation effect are high in cost; in addition, the existing acoustic wave soot blower increases the gap, increases complex structures or complex plugging equipment, such as an ash stopping valve or other pipeline structures, in this way, the space easy to plug is enlarged, the possibility of plugging is increased, once the equipment structure has a problem, the equipment structure can cause plugging again, the maintenance difficulty is high, the structure is complex, and the later maintenance is not facilitated.

Disclosure of Invention

The invention aims to provide an acoustic wave soot blower with a positive pressure type anti-blocking function, which is used for solving the technical problem that the conventional acoustic wave soot blower cannot thoroughly solve abnormal sounding caused by the influence of dust particles accumulated in dead angles in a shell.

The basic scheme provided by the invention is as follows: a sound wave soot blower with positive pressure type anti-blocking function comprises a sound source assembly, a flange plate group and a sound wave conduction assembly which are communicated in sequence; the sound wave conduction assembly comprises a horn body, an interlayer cylinder and a shell which are coaxially sleeved and are provided with clearance spaces; the shell is cylindrical and is positioned on the outermost layer, and one end of the shell is fixedly connected to one side of the flange plate group; the interlayer cylinder is an arc cone cylinder and is positioned between the horn body and the shell, and comprises an air inlet end and an air outlet end, wherein the air inlet end is fixedly connected to one side of the flange plate group, and the air outlet end is fixedly connected with the other end of the shell; the horn body comprises a small end and a large end, the small end is fixedly connected to one side of the flange plate group, and a clearance space is reserved between the large end and the other end of the shell; the flange plate component is provided with a plurality of through holes; the through holes are aligned with the clearance space between the horn body and the interlayer cylinder; the device also comprises a gas compressor and a gas conduit group; the gas compressor is connected with the through holes through the gas conduit group and is used for sending gas into a gap space between the horn body and the interlayer cylinder through the through holes to form rotational flow air pressure.

The working principle and the advantages of the invention are as follows: the sound source assembly conducts proper sound waves from a small end to a large end through a horn body of the sound wave conduction assembly, blows the sound waves into a space to be cleaned to clean the dust, simultaneously utilizes a shell of the sound wave conduction assembly to realize structural protection on the horn body, and utilizes an interlayer cylinder of the sound wave conduction assembly to divide a clearance space between the shell and the horn body into a closed space between the shell and the interlayer cylinder and a rotational flow space between the interlayer cylinder and the horn body; the enclosed space prevents suspended matters caused by gaps between the horn body shells from being sticky and accumulated in the dead angles of the shells, influences normal sounding of the horn bodies, realizes sticky and accumulated dead angle suspended matters between the isolation shells and the horn bodies, and improves the soot blowing effect and the working efficiency of the acoustic soot blower. The gas compressor is utilized to send gas into the cyclone space from the through hole through the gas conduit group, the surrounding flow direction is realized in the cyclone space, suspended matters entering the gap between the horn body and the shell are purged, the suspended matters are prevented from being accumulated and attached to the horn body, and the sound wave soot blowing effect is prevented from being influenced.

Compared with the prior art, under the thinking mode of fully plugging the space easy to plug, the scheme breaks through the inertia thinking, does not adopt the conventional physical and mechanical plugging mode, but still keeps the opening mode of the space easy to plug, so that the opening can realize ash removal by utilizing the rotational flow, the ash return can be thoroughly isolated, dead angle accumulation of a shell is avoided, ash removal and heat dissipation can be realized by utilizing the rotational flow at the same time, the condition of dead angle accumulation is balanced, the ash removal efficiency is improved, the high-efficiency self-ash removal capability is maintained, the soot blowing efficiency is improved, and the device has the characteristics of simple structure, environmental protection in an anti-blocking mode and strong ash removal capability.

Further, a plurality of vibrators are fixedly connected to the outer side face, facing the shell, of the interlayer cylinder.

The beneficial effects are that: the interlayer cylinder is driven to regularly vibrate through the vibrator, large granular substances entering a gap between the horn body and the shell can be crushed, accumulation is prevented from being attached to the outside of the interlayer cylinder and the horn body, the interlayer cylinder is matched with rotational flow, and the ash removal efficiency is improved.

Further, the plurality of vibrators are circumferentially and uniformly distributed on the outer side face of the interlayer barrel and close to the small end of the horn body.

The beneficial effects are that: through tests, the smaller the influence on the sound production efficiency of the sound wave soot blower is along with the increase of the vibration frequency in a certain range, the circumference is uniformly distributed and the small end is close to the horn body.

Further, the number of the plurality of vibrators is 3; the distance between the vibrators and the small end of the horn body is controlled within the range of 1/4-1/3 of the length of the interlayer barrel along the horizontal axis direction.

The beneficial effects are that: tests show that the range of the number and the interval can enable the ash cleaning efficiency to be high, the sound production efficiency to be improved, and the efficiency is not high in other numbers and intervals.

Further, along the horizontal axis direction, the length of the shell is smaller than the length of the horn body and larger than the length of the interlayer barrel.

The beneficial effects are that: the length of the shell is smaller than that of the horn body, so that the fixed acoustic soot blower is conveniently installed on a device needing to be cleaned by utilizing the length difference; the length of the shell is greater than that of the inner cylinder, so that the interlayer cylinder is convenient to install on the shell.

Further, the length of the interlayer barrel is controlled to be in the range of two-thirds to three-quarters of the length of the horn body.

The beneficial effects are that: by the size arrangement, the clearance space between the shell and the interlayer cylinder and the clearance space between the interlayer cylinder and the horn body can be controlled within a certain proportion range, so that the soot blowing effect is kept in a high-efficiency mode.

Further, the diameter difference between the outer shell and the large end of the horn body is smaller than the diameter difference between the air inlet end of the interlayer cylinder and the small end of the horn body, and the difference is controlled within the range of 4-5 times.

The beneficial effects are that: the size is set, so that gas is enabled to be in arc-shaped closing-up type rotational flow from the inlet to the outlet, the gas is gathered more at the outlet, the soot blowing capability can be effectively improved, and meanwhile the possibility that suspended matters enter the cavity is reduced.

Further, the flange group comprises a first flange arranged at the small end of the horn body, a second flange arranged at one end of the shell and a third flange arranged at the air inlet end of the interlayer cylinder.

The beneficial effects are that: the firmness of the fixed connection of the horn body, the interlayer cylinder and the shell is improved.

Further, the first flange plate and the second flange plate have the same structure; the diameters of the third flange plates are smaller than those of the first flange plate and the second flange plate.

The beneficial effects are that: the first flange plate and the second flange plate have the same structure, so that the airflow path of the through hole is increased, the structural design of the through hole is more reasonable, the circulation effect is enhanced, and the soot blowing efficiency is improved.

Further, the sound source assembly comprises a sound generating device and a bent pipe connected between the sound generating device and the flange plate group; one end of the bent pipe is coaxial with the sounding device; the other end of the bent pipe is coaxial with the flange plate group and the sound wave conduction component.

The beneficial effects are that: the sound wave quality of the incoming horn body is improved.

Drawings

FIG. 1 is a front view of an acoustic soot blower with positive pressure anti-blocking function according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG. 1 A-A.

FIG. 3 is a cross-sectional view of FIG. 1B-B.

Fig. 4 is a schematic structural diagram of an vibrator according to an embodiment of the present invention.

Fig. 5 is a cross-sectional view of a through hole according to an embodiment of the present invention.

FIG. 6 is a left side view of an acoustic soot blower with positive pressure anti-blocking function according to an embodiment of the present invention.

Fig. 7 is a swirl simulation diagram of a swirl space provided by an embodiment of the present invention.

Fig. 8 is an assembly schematic diagram of an acoustic wave conduction assembly according to an embodiment of the present invention.

Detailed Description

The following is a further detailed description of the embodiments:

the labels in the drawings of this specification include: sound source unit 1, sound generating device 11, bent pipe 12, flange plate group 2, first flange plate 21, second flange plate 22, third flange plate 23, first bolt group 24, second bolt group 25, third bolt group 26, sound wave conduction unit 3, horn 31, barrier cylinder 32, outer shell 33, front end shell 331, rear end shell 332, through hole 4, straight hole section 41, bent hole section 42, inclined hole section 43, gas compressor 5, gas pipe group 6, branch pipe 61, closed space 7, swirling space 8, vibrator 9.

An example is substantially as shown in figure 1: a sound wave soot blower with positive pressure type anti-blocking function comprises a sound source assembly 1, a flange plate group 2 and a sound wave conduction assembly 3 which are sequentially communicated.

As shown in fig. 1 and 2, the acoustic wave conducting assembly 3 includes a horn 31, a barrier cylinder 32 and a housing 33 coaxially sleeved and each having a gap space; the shell 33 is cylindrical and is positioned on the outermost layer, and one end of the shell is fixedly connected to one side of the flange plate group 2; the horn body 31 comprises a small end and a large end, according to the structure of the common horn body 31, the large opening is the large end, the small opening is the small end, as shown in fig. 2, the small opening is left and right, the large opening is used for illustrating the difference between the large end and the small end, the small opening is fixedly connected to one side of the flange plate set 2, the large end faces the space to be cleaned, the sound source assembly 1 is communicated with the horn body 31, sound waves are transmitted from the sound source assembly 1 to the horn body 31, are guided to the large end by the small opening, and are transmitted into the space to be cleaned from the large end to clean the ash.

The interlayer barrel 32 is an arc cone barrel and is located between the horn body 31 and the shell 33, and comprises an air inlet end and an air outlet end, the air inlet end is fixedly connected to one side of the flange plate set 2, the diameter of the air inlet end is larger than that of the small end of the horn body 31 and smaller than that of the shell 33, the diameter difference is formed between the shell 33 and the air inlet end of the interlayer barrel 32, the diameter difference is formed between the air inlet end of the interlayer barrel 32 and the small end of the horn body 31, the two diameter differences are arranged in a reasonable range, an effective gap space is formed, in the embodiment, the diameter of the shell 33 is 419mm, the diameter of the air inlet end of the interlayer barrel 32 is 200mm, the diameter of the small end of the horn body 31 is 120mm, and the formed gap space is in a proper range. The outlet end is fixedly connected to the housing 33 at the other end close to the housing 33, the outlet end has a diameter equal to the diameter of the housing 33 and larger than the diameter of the large end of the horn 31, and the diameter difference makes the outlet end of the barrier cylinder 32 and the large end close to the horn 31 disconnected to form an opening, so that gas can flow from the inlet end to the outlet end, suspended matters can be blown away from the opening, and the connection is defined to divide the housing 33 into a front end housing 331 and a rear end housing 332 for better description. The diameter difference between the diameter of the air outlet end and the diameter of the shell 33 and the diameter of the large end of the horn body 31 is controlled within the range of 20-30mm, so that the protection effect and the sound wave enhancement effect of the shell 33 on the horn body 31 can be ensured, meanwhile, the gap space volume between the shell 33 and the horn body 31 can be reduced as much as possible, the possibility of ash returning is reduced, in the embodiment, the diameter difference between the large end of the horn body 31 and the diameter of the shell 33 is 399mm, and the diameter difference between the diameter difference and the diameter of the shell 33, the diameter of the air inlet end of the interlayer cylinder 32 and the diameter of the small end of the horn body 31 are 20mm, through tests, the diameter difference and the diameter difference between the diameter of the interlayer cylinder 32 and the diameter of the small end of the horn body 31 are mutually matched, the gap space between the shell 33 and the horn body 31 can be reasonably divided, and dead angle accumulation and ash cleaning efficiency can be avoided in balance.

In summary, as shown in fig. 2, the separation tube 32 divides the gap space between the horn 31 and the housing 33 into a closed space 7 and a swirling space 8, and the closed space 7 is a space surrounded by the rear end housing 332, the separation tube 32, and the flange group 2 between the housing 33 and the separation tube 32, for separating suspended matters flowing back from the large end of the horn 31; the swirl space 8 is formed by the rear end shell 332, the interlayer cylinder 32, the part of the flange plate group 2 between the interlayer cylinder 32 and the horn body 31 and the opening space formed by the horn body 31, the opening is formed by the diameter difference between the outer shell 33 and the large end of the horn body 31, the opening faces the large end of the horn body 31, the gas is ensured to be sent into the swirl space 8 from the air inlet end of the interlayer cylinder 32 and then flows to the air outlet end, the ash is removed at the opening by utilizing the air pressure, and the gas flows in the swirl space 8 to play a role in radiating the horn body 31, so that the effects of ash removal and radiating are achieved, the gas use efficiency is improved, the environment is protected, the consumption is reduced, and the cost is reduced.

The volume of the enclosed space 7 is smaller than that of the cyclone space 8, and the arrangement is to balance the enclosed space 7 to solve the problem of dead angle accumulation and effectively clean cyclone gas, otherwise, the enclosed space 7 is too large, so that the cyclone space 8 is small, the air flow at the opening in unit time is small, and the high-efficiency ash removal efficiency cannot be realized, so that the control is required in a reasonable space proportion range; in order to achieve the above object, the structural dimensions may be range-limited in the following manner.

Specifically, along the horizontal axis direction, the length of the shell 33 is smaller than the length of the horn body 31 and larger than the length of the interlayer barrel 32, the length of the shell 33 is smaller than the length of the horn body 31, the length difference is controlled within the range of 15-20mm, the fixing plate is convenient to install at the length difference, and the connection firmness of the acoustic soot blower on the space or equipment to be cleaned is improved; the length of the shell 33 is larger than that of the interlayer barrel 32, and the specific length difference is matched with the lengths of the interlayer barrel 32, the horn body 31 and the size of the fixing plate, so that gas guiding and assembling are facilitated.

Specifically, the length control of the interlayer section of thick bamboo 32 is in the range of two thirds to three quarters of horn body 31 length, in this embodiment, shell 33 length is 745mm, horn body 31 length is 760mm, interlayer section of thick bamboo 32 length is 570mm, the setting of this length, with the setting looks adaptation of shell 33, interlayer section of thick bamboo 32 and horn body 31 diameter in this embodiment, can obtain reasonable enclosure space 7 volume and whirl space 8 volume, the volume of enclosure space 7 as little as possible guarantees the adhesion of dead angle suspended solid between enclosure and the horn body 31 of realization of enclosure space 7 simultaneously, the volume of whirl space 8 as big as possible guarantees whirl soot blowing efficiency and keeps high-efficient state simultaneously.

Specifically, the diameter difference between the air inlet end of the shell 33 and the air inlet end of the interlayer cylinder 32 is controlled to be 2-2.5 times of the diameter difference between the air inlet end of the interlayer cylinder 32 and the small end of the horn body 31, and the volume ratio of the closed space 7 to the rotational flow space 8 can be controlled within a reasonable range by matching with other structural dimensions.

Specifically, the diameter difference between the outer shell 33 and the large end of the horn body 31 is smaller than the diameter difference between the air inlet end of the interlayer cylinder 32 and the small end of the horn body 31, the difference is controlled to be 4-5 times, in the embodiment, the difference is 4 times, the size is set, the air can be enabled to be in arc-shaped closing-up rotational flow from air inlet to air outlet, the air is gathered more at the outlet, the soot blowing capability can be effectively improved, and meanwhile the possibility that suspended matters enter the cavity is reduced.

As shown in fig. 1, 2 and 4, the outer side surface of the interlayer cylinder 32 facing the shell 33 is fixedly connected with a plurality of vibrators 9, and in this embodiment, the vibrators are welded and fixed; the interlayer cylinder 32 is driven to regularly vibrate through the vibrator 9, large granular substances entering a gap between the horn body 31 and the shell can be crushed, accumulation and adhesion of the large granular substances outside the interlayer cylinder 32 and the horn body 31 are prevented, the large granular substances are matched with rotational flow, and the ash removal efficiency is improved. The surface of the interlayer cylinder 32 has a small static friction coefficient, which is beneficial to the sliding of the crushed and granular materials during the agglomeration of suspended matters.

In order to select proper vibrators 9 for testing, the vibrators 9 with different powers and different frequencies are selected to be installed at different positions of the interlayer barrel to test the influence on the sound emission efficiency (sound emission decibel dB at the large end of the test horn 31) of the sound wave soot blower, wherein the front end represents the position, close to the small end of the horn, of the interlayer barrel. As shown in table 1, table 2 and table 3:

TABLE 1 Effect of vibrator with 60w Power on sounding efficiency

TABLE 2 Effect of vibrator with 100w Power on sounding efficiency

TABLE 3 influence of different numbers of vibrators with 100w of power on sounding efficiency

It can be seen from tables 1 and 2 that, regardless of the vibrator 9 of power 60w or 100w, the number and position of the vibrator 9 are kept unchanged, the sound emission decibels are reduced from low to high with the increase of the vibration frequency in a certain range, and the sound emission efficiency is higher at the front end (the small end near the horn body 31), which means that the influence on the sound emission efficiency is small when the vibrator 9 is mounted at the front end, and the sound emission efficiency can be kept at high efficiency.

Therefore, the plurality of vibrators 9 are circumferentially and uniformly distributed on the outer side surface of the interlayer barrel 32 and are close to the small end of the horn body 31, and the distance between the plurality of vibrators 9 and the small end of the horn body 31 is controlled within the range of 1/4-1/3 of the length of the interlayer barrel 32 along the horizontal axis direction, in this embodiment, the distance between the plurality of vibrators 9 and the small end of the horn body 31 is 1/4 of the length of the interlayer barrel 32 along the horizontal axis direction, and the number is 3, and the number is: HS-8SH-4528, resonance frequency 28KHz, power 100W, static capacitance 5600+ -10% (pF), resonance impedance less than or equal to 20 (Ω), external dimension 45x52mm diameter height, insulation impedance more than or equal to 100M (Ω), this data size selection is suitable for other structural dimensions of this embodiment, not only guaranteeing the vibration ash removal effect of vibrator 9, but also reducing negative effects on sound production efficiency.

As shown in fig. 3 and 5, a plurality of through holes 4 are uniformly distributed on the circumference of the flange plate group 2; the through holes 4 are aligned with the clearance space between the horn body 31 and the interlayer cylinder 32, namely the rotational flow space 8; the through hole 4 comprises a straight hole section 41, a bent hole section 42 and an inclined hole section 43, air is introduced from the straight hole section 41, air is discharged from the inclined hole section 43, the section of the air inlet end is circular, the section of the air outlet end is elliptical, and the diameter of the circular is smaller than the major axis of the ellipse, so that swirling flow is formed; the inclination angle of the inclined hole section 43 is controlled within the range of 20-25 degrees, in the embodiment, the inclination angle is 22 degrees, the diameter of the section of the straight hole section 41 is 25mm, the number of through holes is 4, and the data are limited, so that the gas can flow around under the action of air pressure within a small range, and the suspension can be purged out with high efficiency. If dust is generated around the through holes, the rotational flow ventilation and blowing frequency can be improved, and the influence caused by suspended particles entering the cavity is further reduced.

As shown in fig. 1, 6 and 7, the sonic soot blower further comprises a gas compressor 5 and a gas conduit group 6; the gas compressor 5 is connected with the through holes 4 through the gas conduit group 6 and is used for sending gas into the gap space between the horn body 31 and the interlayer cylinder 32 through the through holes 4 to form rotational flow air pressure. The gas conduit group 6 has a plurality of branch conduits 61 which are fitted one by one to the plurality of through holes 4, and is illustrated as 2 branch conduits 61 as shown in fig. 6, but the number of branch conduits 61 is not limited, and is set according to the actual number of through holes 4. In this embodiment, the gas is the dry compressed air after steam-water separation, and the dry compressed air after steam-water separation improves the dryness of the gas of the anti-blocking cavity of input whirl, reduces the probability that the gas of cavity inside because of self input has moisture to mix with the return ash and forms the deposit again, before the suspended solid is not piled up and is formed the caking lump, blows this part out, improves the soot blowing effect. In operation, negative pressure exists in the space to be cleaned, but the space to be cleaned is blocked due to accumulation, so that the pressure difference between the clearance space and the space to be cleaned is changed, and the constant pressure condition of the clearance space occurs. The ventilation is controlled by the gas compressor 5, so that the pressure in the cavity is higher than the pressure outside the cavity as long as ventilation is operated, the gas source pressure is 0.3-0.6MPA, and the spiral flow space, namely the positive pressure, is spirally purged under the condition of 0.5 MPA.

The sound source assembly 1 comprises a sound generating device 11 and a bent pipe 12 connected between the sound generating device 11 and the flange plate group 2; one end of the bent pipe 12 is coaxial with the sound generating device 11; the other end of the bent pipe 12 is coaxial with the flange plate group 2 and the sound wave conduction component 3, so that the sound wave quality entering the horn body 31 is improved.

In order to improve the firmness of the fixed connection, as shown in fig. 8, in this embodiment, the flange set 2 includes a first flange 21 installed at the small end of the horn 31, a second flange 22 installed at one end of the housing 33, and a third flange 23 installed at the air inlet end of the barrier cylinder 32. The first flange 21 and the second flange 22 have the same structure; the diameters of the third flange plate 23 are smaller than those of the first flange plate 21 and the second flange plate 22, so that the shell 33 and the horn body 31 are firmly installed, the thickness of the flange plate group 2 can be increased, the through holes 4 penetrate through the first flange plate and the second flange plate, longer guide grooves are formed, and more effective swirling flow of gas is facilitated.

The first flange 21 and the second flange 22 are fixedly connected near the outer ring side by a first bolt group 24, and in this embodiment, the first bolt group 24 is a M30x80 high strength bolt; the third flange 23 is fixedly connected with the first flange 21 and the second flange 22 through a second bolt group 25, and in this embodiment, the second bolt group 25 is a M10x60 high-strength bolt; the casing 33 is fixedly connected with the interlayer barrel 32 through a third bolt set 26, in this embodiment, the third bolt set 26 is a high-strength bolt with the model number of M20x30, so as to realize the stable connection of the whole acoustic assembly. Sealing rings are arranged at the positions of the second bolt group 25 and the third bolt group 26, so that the sealing performance of a sealing space is improved, and return ash is prevented from entering the cavity through bolts to be accumulated.

When the sound wave soot blower is specifically used, the whole sound wave soot blower is installed in a space to be cleaned in a conventional manner, the specific installation manner is a manner known to a person skilled in the art, and the installation manner is not limited. The big end of the horn body 31 faces to a closed space 7 needing to be cleaned, such as an SCR denitration reactor, when the reactor runs, the cleaning is needed, sound waves are guided from the small end of the horn body 31 to the big end and are transmitted into the reactor, the cleaning is realized, the pressure in the cleaning space of the reactor is higher than the pressure in the cavity of the sound wave soot blower, and negative pressure is formed, so that part of suspended dust is possibly introduced into a gap space between the horn body 31 and the shell; the interlayer barrel 32 of the invention is arranged to form a sealed space and a cyclone space 8, when suspended dust approaches the acoustic soot blower, the cyclone space 8 is provided with airflow at an opening, and in a certain air pressure range, suspended matters can be effectively isolated outside the acoustic soot blower, even if suspended dust possibly enters from the opening of the cyclone space 8, the sealed space can be effectively isolated, suspended dust is prevented from entering dead corners of a shell to form accumulation, meanwhile, in the cyclone space 8, the vibration of the vibrator 9 and the continuous cyclone disturbance are added, the suspended dust can be blown out from the opening along with the cyclone again, so that positive pressure type dust blowing is realized, the suspended matters are prevented from being accumulated and attached to the horn body 31 to influence the acoustic soot blowing effect, and the soot blowing efficiency of the acoustic soot blower is improved.

In order to realize effective rotational flow, the air pressure range is 0.3-0.5Mpa, the air inlet time length can be set to be 1 minute, and the interval time length is 2 minutes; and according to the condition that the sound presents high-frequency sharp sound when the unit operates, judging that the ash accumulation is serious, increasing the sweeping frequency of the compressed gas in a mode of shortening the equal interval time length and increasing the set time length, and shortening and increasing the equal interval time length and the set time length by a half.

Compared with the prior art, when the acoustic wave soot blower with the positive pressure type anti-blocking function is used, the horn body is in a closed boiler enclosed space, the air medium combined with the horn body and communicated by the bent pipe is used for blowing the smoke and suspended matters in the boiler under the pressure of sound energy, and meanwhile, due to the formation of the enclosed space and the cyclone space, the soot accumulation blocking between the horn body and the shell is avoided, the soot blowing effect and the working efficiency of the acoustic wave soot blower are improved, abnormal sounding caused by the soot accumulation blocking in the acoustic wave soot blower can be effectively avoided, the sound energy waste is caused, and the problems of serious boiler heat exchange area, low boiler efficiency, high smoke exhaust temperature and the like are solved; compared with the traditional sound wave soot blower, the soot blowing efficiency is greatly improved.

The foregoing is merely an embodiment of the present invention, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present invention, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.

Claims (10)

1. The sound wave soot blower with the positive pressure type anti-blocking function is characterized by comprising a sound source assembly, a flange plate group and a sound wave conduction assembly which are communicated in sequence; the sound wave conduction assembly comprises a horn body, an interlayer cylinder and a shell which are coaxially sleeved and are provided with clearance spaces; the shell is cylindrical and is positioned on the outermost layer, and one end of the shell is fixedly connected to one side of the flange plate group; the interlayer cylinder is an arc cone cylinder and is positioned between the horn body and the shell, and comprises an air inlet end and an air outlet end, wherein the air inlet end is fixedly connected to one side of the flange plate group, and the air outlet end is fixedly connected with the shell at the other end close to the shell; the horn body comprises a small end and a large end, and the small end is fixedly connected to one side of the flange plate group; the flange plate component is provided with a plurality of through holes; the through holes are aligned with the air inlet end of the interlayer cylinder; the device also comprises a gas compressor and a gas conduit group; the gas compressor is connected with the through holes through the gas conduit group and is used for sending gas into a gap space between the horn body and the interlayer cylinder through the through holes to form rotational flow air pressure.

2. The sound wave soot blower with positive pressure type anti-blocking function according to claim 1, wherein a plurality of vibrators are fixedly connected to the outer side face of the interlayer cylinder facing the shell.

3. The sound wave soot blower with positive pressure type anti-blocking function according to claim 2, wherein the plurality of vibrators are circumferentially and uniformly distributed on the outer side surface of the interlayer barrel and close to the small end of the horn body.

4. A sonic soot blower with positive pressure anti-blocking function as defined in claim 3, wherein the number of said plurality of vibrators is 3; the distance between the vibrators and the small end of the horn body is controlled within the range of 1/4-1/3 of the length of the interlayer barrel along the horizontal axis direction.

5. The acoustic sootblower with positive pressure anti-blocking function of claim 1 wherein the length of said housing is less than the length of the horn and greater than the length of the barrier cylinder in the horizontal axis direction.

6. The sound wave soot blower with positive pressure type anti-blocking function according to claim 1, wherein the length of the barrier cylinder is controlled to be in the range of two-thirds to three-quarters of the length of the horn body.

7. The sound wave soot blower with positive pressure type anti-blocking function according to claim 1, wherein the diameter difference between the outer shell and the large end of the horn body is smaller than the diameter difference between the air inlet end of the interlayer cylinder and the small end of the horn body, and the difference is controlled within the range of 4-5 times.

8. The acoustic soot blower with positive pressure type anti-blocking function according to claim 1, wherein the flange plate group comprises a first flange plate installed at the small end of the horn body, a second flange plate installed at one end of the shell, and a third flange plate installed at the air inlet end of the interlayer cylinder.

9. The acoustic soot blower with positive pressure type anti-blocking function according to claim 8, wherein the first flange plate and the second flange plate have the same structure; the diameters of the third flange plates are smaller than those of the first flange plate and the second flange plate.

10. The sound wave soot blower with positive pressure type anti-blocking function according to claim 1, wherein the sound source assembly comprises a sound generating device and a bent pipe connected between the sound generating device and the flange plate group; one end of the bent pipe is coaxial with the sounding device; the other end of the bent pipe is coaxial with the flange plate group and the sound wave conduction component.