CN217178546U - Acoustic energy ash remover for boiler heating surface - Google Patents

Abstract

The utility model discloses a boiler heating surface acoustic energy ash remover relates to the technical field of acoustic energy ash remover, which comprises a housin, the air guide end cover, booster mechanism and sound generating mechanism, sealing connection has the air guide end cover on the casing, is provided with booster mechanism in the cavity between casing and the air guide end cover, and the lower extreme of casing is provided with the inlet port, is provided with the venthole on the air guide end cover, and the inner chamber internal rotation of air guide end cover is provided with sound generating mechanism, and sound generating mechanism can cover the venthole, is provided with the adjusting valve of air current flow area on the venthole, and the inlet port is used for connecting compressed gas, and the venthole is used for connecting the mounted position on the boiler. The utility model discloses a sound energy player conveys ash removal target location, piles up the soot on the heating surface of accepting in the effective distance of sound energy propagation and carries out the disturbance and break away from, can not produce the ash removal dead angle, makes the deposition of boiler heating surface clear away, and the heat transfer obtains improving, improves boiler unit operation security and economic nature.

Description

Acoustic energy ash remover for boiler heating surface

Technical Field

The utility model relates to a technical field of acoustic energy ash remover especially relates to a boiler heating surface acoustic energy ash remover.

Background

In the operation process of a generator set boiler system of a thermal power plant, high-temperature soot generated by burning coal is discharged from a chimney after being desulfurized and denitrified under the action of an induced draft fan through pipelines such as a furnace chamber and a flue therebehind. The soot generated by boiler combustion is mutually accumulated on heating surfaces such as furnace walls or flue walls during the transmission process through the furnace and the flue to form soot accumulation. Because the heat conductivity coefficient of the ash is small, the accumulated ash on the heating surface of the boiler influences the heat transfer of the heating surface, so that the heat exchange capability of the working medium at the position is reduced, the exhaust gas temperature of the boiler is increased, and the thermal efficiency of the boiler is reduced.

The most position such as the dog-ear flame angle of generating set boiler system, high temperature reheater, high temperature over heater, air heater at present uses the steam soot blower, and the high pressure steam power that the steam soot blowing used sprays for a long time and receives heat exchange tube outer wall of face and can lead to the pipeline attenuation, and the heat exchange tube during operation of attenuate can take place to break and lead to the working medium to reveal the occurence of failure, and uses the steam price of blowing high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a boiler receives hot side acoustic energy ash remover to solve the problem that above-mentioned prior art exists, make the clean swift, the heat transfer of deposition clean up of boiler receiving hot side obtain improving the thermal efficiency of boiler.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a boiler heating surface acoustic energy ash remover, including casing, air guide end cover, booster mechanism and sound generating mechanism, sealing connection has on the casing the air guide end cover, the casing with be provided with in the cavity between the air guide end cover booster mechanism, the lower extreme of casing is provided with the inlet port, be provided with the venthole on the air guide end cover, the inner chamber internal rotation of air guide end cover is provided with sound generating mechanism, sound generating mechanism can cover the venthole, be provided with the adjusting valve of air current flow area on the venthole, the inlet port is used for connecting compressed gas, the venthole is used for connecting the mounted position on the boiler.

Preferably, the supercharging mechanism is a turbocharger, and blades of a spinning wheel of the turbocharger are streamlined and thick in the middle and thin in the edge.

Preferably, the upper end of a transmission shaft of the turbocharger penetrates through the air guide end cover to be connected with the motor, and the lower end of the transmission shaft of the turbocharger is connected with a pressing cap.

Preferably, connect on turbocharger's the transmission shaft sound production mechanism, sound production mechanism includes the sound production carousel, the sound production carousel is fixed in through lock nut on the transmission shaft, the transmission shaft with be provided with the bearing between the air guide end cover, be provided with at least one special-shaped phonation hole on the sound production carousel, the position of phonation hole with the venthole can the phase-match.

Preferably, the inner cavity of the shell comprises a conical hopper surface and a cylindrical surface which are sequentially connected, the conical hopper surface is a streamline curved surface in smooth transition, and the supercharging mechanism is positioned in the cylindrical surface.

Preferably, the air guide end cover comprises an upper cover and a lower cover, the upper cover and the lower cover are connected to the shell through bolts, an inner cavity formed between the upper cover and the lower cover is communicated with the air outlet hole, and the air outlet hole penetrates through the upper cover and the lower cover.

Preferably, the upper cover is provided with an air guide bent pipe, one end of the air guide bent pipe is communicated with the air outlet hole, the other end of the air guide bent pipe is connected with an expansion joint through a flange plate, and a flow guide sleeve is arranged in the expansion joint.

Preferably, the lower surface of the lower cover is a streamline curved surface which is inclined upwards and smoothly transits.

Preferably, the adjusting valve is a tooth-shaped adjustable valve, and the tooth-shaped adjustable valve is located above the sounding mechanism.

Preferably, the tooth-shaped adjustable valve comprises tooth-shaped plates, a pull rod and a bolt for locking and positioning, the two tooth-shaped plates are relatively inserted into the side wall of the air outlet hole, the pull rod penetrates through the side wall of the air outlet hole and is connected with the tooth-shaped plates, and the bolt penetrates through the side wall of the air outlet hole and is abutted to the pull rod.

The utility model discloses for prior art gain following technological effect:

the utility model discloses a boiler heating surface acoustic energy ash remover, can be different according to the requirement of service position temperature and sound intensity, select different materials and overall dimension, the gasification sound energy power of production, convey the ash removal target location through the acoustic energy player, pile up the ash particle on the heating surface of accepting in the effective distance that the acoustic energy propagated and disturb, separate and break away from with the heating surface after reaching the fatigue stress that makes it discrete between the ash particle, can not produce the ash removal dead angle, discharge to electrostatic precipitator through the flue under the effect of the little negative pressure air current that the draught fan operation at boiler flue rear portion formed and retrieve; after the heat exchanger is used, the accumulated dust on the heating surface of the boiler can be removed, the heat exchange is improved, and the operation safety and the economical efficiency of a boiler unit are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a sonic energy ash remover for a boiler heating surface according to the present invention;

FIG. 2 is a schematic view of the internal structure of the acoustic energy ash remover for the heating surface of the boiler;

FIG. 3 is a schematic view of a partial structure of the acoustic energy ash remover for the heating surface of the boiler according to the present invention;

FIG. 4 is a schematic view of the acoustic energy ash remover for the heating surface of a boiler according to the present invention;

fig. 5 is a schematic structural view of the housing of the present invention;

wherein: 1-a sound energy ash remover for a heating surface of a boiler, 2-a shell, 3-a spinning wheel, 4-a transmission shaft, 5-a sound-producing turntable, 6-a bearing, 7-a locking nut, 8-an upper cover, 9-a lower cover, 10-a sound-producing hole, 11-an air inlet hole, 12-an air outlet hole, 13-a motor, 14-a pressing cap, 15-an air guide bent pipe, 16-an expansion joint, 17-a toothed plate, 18-a pull rod, 19-a coupler, 20-a flange plate and 21-a bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model aims at providing a boiler heating surface acoustic energy ash remover to solve the problem that prior art exists, make the clean swift, the heat transfer of deposition clean up of boiler heating surface obtain improving, improve the thermal efficiency of boiler.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 1 to 5: the embodiment provides a boiler heating surface acoustic energy ash remover 1, including casing 2, the air guide end cover, booster mechanism and sound generating mechanism, sealing connection has the air guide end cover on the casing 2, be provided with booster mechanism in the cavity between casing 2 and the air guide end cover, the lower extreme of casing 2 is provided with inlet port 11, be provided with venthole 12 on the air guide end cover, the inner chamber internal rotation of air guide end cover is provided with sound generating mechanism, sound generating mechanism can cover venthole 12, be provided with the regulating valve of air current flow area on the venthole 12, inlet port 11 is used for connecting compressed gas, venthole 12 is used for connecting the mounted position on the boiler.

The supercharging mechanism is turbo charger, turbo charger's spinning wheel 3's blade is streamlined and middle thick edge is thin, turbo charger adopts the mature axial-flow type structure of technical theory in this embodiment, spinning wheel 3's blade design adopts the variable sectional area design that accords with the torsion angle of hydrodynamics theory, rotatory in-process air current is inhaled along spinning wheel 3 axis direction, the air current is compressed and is gathered back pressure rise under the effect of rotatory centrifugal force by rotatory blade, the high-pressure draught after the pressure boost is converted into high strength sound energy by follow-up vocal mechanism, make the effective distance of transmission of sound wave farther. The upper end of a transmission shaft 4 of the turbocharger penetrates through an air guide end cover to be connected with a motor 13, the lower end of the transmission shaft 4 is connected with a pressing cap 14, the motor 13 is connected with the transmission shaft 4 through a coupler 19, and the motor 13 is a three-phase asynchronous motor closed type explosion-proof motor and can adapt to the environment with high use reliability requirements and poor conditions. Connect sound generating mechanism on turbocharger's transmission shaft 4, sound generating mechanism includes sound production carousel 5, sound production carousel 5 is fixed in on transmission shaft 4 through lock nut 7, axial position remains unchanged throughout at rotatory working process with guaranteeing sound production carousel 5, be provided with bearing 6 between transmission shaft 4 and the air guide end cover, preferred antifriction bearing, can satisfy the high-speed requirement of rotating and can bearing long-term safe handling under the workload condition, be provided with at least one special-shaped phonation hole 10 on the sound production carousel 5, the position and the venthole 12 of phonation hole 10 can the phase-match, sound production carousel 5 adopts the manufacturing of high temperature heat-resistant steel. In this embodiment, the sounding holes 10 can generate special-shaped holes of low-frequency pulse waves, and the number of the sounding holes 10 with a plurality of corresponding audio frequencies can be uniformly distributed along the circumferential direction of the sounding turntable 5 according to the acoustic energy theory and practice, and the maximum efficiency conversion of gasification sound is realized by the rotation of the sounding turntable 5 rotating at a high speed; the high-pressure airflow formed between the air outlet hole 12 and the sound-producing turntable 5 is in a continuous through-flow and blocking state through the stationary air outlet hole 12. The compressed air for power plant maintenance or the compressed air for instruments are 0.6MPa, the pressure can be reduced to 0.5MPa in the use process of each device of the ash removal system, the sound strength generated by the ash removal device is weakened due to the reduction of the air inlet pressure, the ash removal use effect of an ash removal product is influenced, and the defects are overcome by the design of turbocharging of the embodiment.

The inner cavity of the shell 2 comprises a conical hopper surface and a cylindrical surface which are connected in sequence, the conical hopper surface is a streamline curved surface in smooth transition, and the supercharging mechanism is positioned in the cylindrical surface. The air guide end cover comprises an upper cover 8 and a lower cover 9, the upper cover 8 and the lower cover 9 are both connected to the shell 2 through bolts 21, an inner cavity formed between the upper cover 8 and the lower cover 9 is communicated with the air outlet hole 12, and the air outlet hole 12 penetrates through the upper cover 8 and the lower cover 9. An air guide bent pipe 15 is arranged on the upper cover 8, one end of the air guide bent pipe 15 is communicated with the air outlet hole 12, the other end of the air guide bent pipe 15 is connected with an expansion joint 16 through a flange plate 20, a flow guide sleeve is arranged in the expansion joint 16, and the sound energy transmitted by the flow guide sleeve can be smoothly circulated. The design of the air guide bent pipe 15 and the expansion joint 16 is to transmit the sound energy generated by the sounding rotary disc 5, and the air guide bent pipe 15 is internally designed into a smooth curved surface, so that the transmission loss can be minimized; the expansion joint 16 can absorb vibration generated when the equipment rotates and pipeline thermal expansion caused by a high-temperature environment, can compensate and absorb thermal deformation caused by axial, transverse and angular conduction of the pipeline, avoids the influence on the furnace wall caused by the conduction of the vibration to the boiler installation part along the pipeline, and reduces the dynamic and static gaps of the equipment caused by the thermal expansion, so that the damage of friction collision between a rotating part and a static part is caused, and the safe operation of the equipment is ensured. The lower surface of the lower cover 9 is a smooth transitional streamline curved surface which inclines upwards, so that the airflow is convenient to flow in a centralized manner, the streamline curved surface design meets the requirements of aerodynamic hydrodynamics, the airflow is guaranteed to flow smoothly in the equipment, the flow loss is less, and complicated processing and manufacturing can be avoided by the design of function partition combination.

The adjusting valve is a tooth-shaped adjusting valve which is positioned above the sounding mechanism. The adjustable valve of flute profile includes flute profile 17, tie rod 18 and the bolt 21 that is used for locking the location, two flute profile 17 are pegged graft relatively on the lateral wall of venthole 12, tie rod 18 runs through the lateral wall of venthole 12 and is connected with flute profile 17, bolt 21 runs through the lateral wall of venthole 12 and is inconsistent with tie rod 18, adjust the relative distance of opening in the middle of two flute profile 17 about, screw up two bolt 21 and lock tie rod 18, and then fix a position flute profile 17, when can making the sound energy pass through different air current flow area, because of the sound intensity difference in order to reach the function of adjusting the sound energy. The sound intensity of the formed low-frequency oscillation waves forms difference by adjusting the opening and closing degree of the tooth-shaped adjustable valve, so that the ash removal effect at different boiler differential heating surfaces can meet the satisfied requirement; when the tooth-shaped adjustable valve is completely closed, ash particles in the boiler can be effectively prevented from invading the interior of the sounding mechanism during the stop period, and the safe operation of the sounding rotary disc 5 is influenced.

The external interfaces of the embodiment all adopt universal pipeline connecting flanges 20 according to national standards, and the flange 20 components adopt proper types according to the use pressure and the through-flow requirement; when the anti-loosening flange is installed and used on site, the flange plate 20 is connected through the bolts 21, the installation positions of the bolts 21 and the nuts all use anti-loosening gaskets, and the joint surface of the matched flange plate 20 adopts a sealing gasket. The motor 13 adopts a 380V power supply, and a power cable of the power supply is led to an on-site electrical cabinet and is led to a low-voltage power electrical cabinet of a power plant through an air switch. The motor 13 starts and stops the control cable conductor and the motor 13 runs the current feedback signal control cable conductor and lays to the DCS control cabinet of the boiler control room from the on-the-spot regulator cubicle on the spot. And a power line and a control cable of the air source air inlet control electromagnetic valve are laid to the local electrical cabinet, and then the control cable is laid to the DCS control cabinet of the boiler control chamber. In the DCS system, configuration programming is carried out on each control point position including the control of the motor 13 and the control of the electromagnetic valve, and the configuration programming is displayed through a computer picture, so that an operator can remotely operate and control the equipment to operate through a mouse and a keyboard in a control room. Feedback signals such as a current signal, a motor 13 operation temperature signal, a solenoid valve position signal and the like sent to the DCS electrical cabinet when the motor 13 operates are displayed through a computer screen picture after being programmed by the logic configuration of the DCS system, the operation state of the boiler ash conveying system in the control room is displayed in real time, and a signal that a monitoring parameter exceeds a standard value is subjected to alarm prompt through a light character board or an alarm sound. The device can be used by integrating a plurality of acoustic energy ash removers in the ash removal use process of a power plant boiler system, the ash removers are respectively planned into different groups according to different installation positions, the groups are used as operation units during work, the DCS configuration programming is used for setting the working cycle time length and the idle interval of the ash removers in the operation groups according to ash removal indexes, and then the operation cycles of the groups are combined to ensure that the ash removers are operated in a coordinated coupling mode to perform ash removal work. The embodiment is suitable for occasions that the sizes of the furnace wall and the flue in the generator set boiler system are larger and the requirements cannot be met by using the small sound intensity ash remover, and is more suitable for ash removal when the equal spans of the furnace chamber and the flue in the generator set boilers of 600MW and 1000MW are larger; the ultra-megawatt sound intensity and the low frequency broadband sound energy between 100Hz and 400Hz generated by the equipment have obvious actual effect of removing ash on each heating surface of the boiler system.

According to the acoustic energy ash remover 1 for the heating surface of the boiler, the generated gasification acoustic energy force is transmitted to an ash removal target position through the acoustic energy player, the accumulation of ash particles on the received heating surface is disturbed within the effective distance of acoustic energy propagation, the ash particles are separated from the heating surface and separated after reaching the discrete fatigue stress, and the ash particles are discharged to an electric dust removal device through a flue under the action of micro negative pressure airflow formed by the operation of a draught fan at the rear part of the flue of the boiler for recovery. The sound energy power that this embodiment produced can propagate and be full of the whole space of working range, and sound ability propagation range is not influenced by the angle of bending, can not produce the ash removal dead angle.

The acoustic energy ash remover 1 for the heating surface of the boiler in the embodiment is suitable for different use requirements of different mounting positions of different heating surfaces in the boiler on ash removing sound intensity under the same air source and mounting condition; in addition, different use requirements on the sound intensity of the ash remover are caused by different ash particle aggregation degrees at different positions of the boiler due to different ash temperatures; when the device is installed and used, a plurality of ash removers with different sound intensity models can be simultaneously combined and arranged at all positions of a boiler furnace, a flue, an overheating section and the like which need to be installed for ash removal, a gas source can be supplied by using a centralized gas supply pipeline, and the centralized electrical control is realized to realize unified operation management, so that the operation of operators can be simplified under the conditions of safe operation and improved ash removal efficiency, and the guarantee is provided for the implementation of standardized regulations of equipment maintenance; the device can be installed by selecting different materials and appearance sizes according to different requirements of using position temperature and using sound intensity, when the sound energy player is installed on the boiler wall or flue, a hole with a proper size is formed in the corresponding installation part, the sound energy player is inserted into the boiler wall or flue and then the length size of the installation part is adjusted, the original heat exchange pipeline at the position of the hole in the boiler wall is subjected to avoidance processing, the sound energy player is fixed and welded on the boiler wall or flue through an auxiliary installation box sleeved outside the sound energy player, sealing welding is performed on the position of the joint surface of the sound energy player and the boiler wall or flue, and the welding line is required to be qualified according to the acceptance standard.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (10)

1. The utility model provides a boiler heating surface acoustic energy ash remover which characterized in that: including casing, air guide end cover, booster mechanism and sound generating mechanism, sealing connection has on the casing the air guide end cover, the casing with be provided with in the cavity between the air guide end cover booster mechanism, the lower extreme of casing is provided with the inlet port, be provided with the venthole on the air guide end cover, the inner chamber internal rotation of air guide end cover is provided with sound generating mechanism, sound generating mechanism can cover the venthole, be provided with the adjusting valve of air current flow area on the venthole, the inlet port is used for connecting compressed gas, the venthole is used for connecting the mounted position on the boiler.

2. The acoustic energy ash remover for boiler heating surface as claimed in claim 1, wherein: the supercharging mechanism is a turbocharger, and blades of a spinning wheel of the turbocharger are streamline and thick in the middle and thin in the edge.

3. The acoustic energy ash remover for boiler heating surface as claimed in claim 2, wherein: the upper end of a transmission shaft of the turbocharger penetrates through the air guide end cover to be connected with the motor, and the lower end of the transmission shaft of the turbocharger is connected with a pressing cap.

4. The acoustic energy ash remover for boiler heating surface as claimed in claim 2, wherein: connect on turbocharger's the transmission shaft sound production mechanism, sound production mechanism includes the sound production carousel, the sound production carousel is fixed in through lock nut on the transmission shaft, the transmission shaft with be provided with the bearing between the air guide end cover, be provided with at least one special-shaped phonation hole on the sound production carousel, the position of phonation hole with the venthole can the phase-match.

5. The acoustic energy ash remover for boiler heating surface as claimed in claim 1, wherein: the inner cavity of the shell comprises a conical hopper surface and a cylindrical surface which are sequentially connected, the conical hopper surface is a streamline curved surface in smooth transition, and the supercharging mechanism is positioned in the cylindrical surface.

6. The acoustic energy ash remover for boiler heating surface as claimed in claim 1, wherein: the air guide end cover comprises an upper cover and a lower cover, the upper cover and the lower cover are connected to the shell through bolts, an inner cavity formed between the upper cover and the lower cover is communicated with the air outlet hole, and the air outlet hole penetrates through the upper cover and the lower cover.

7. The acoustic energy ash remover for boiler heating surface as claimed in claim 6, wherein: an air guide bent pipe is arranged on the upper cover, one end of the air guide bent pipe is communicated with the air outlet hole, the other end of the air guide bent pipe is connected with an expansion joint through a flange plate, and a flow guide sleeve is arranged in the expansion joint.

8. The acoustic energy ash remover for boiler heating surface as claimed in claim 6, wherein: the lower surface of the lower cover is a streamline curved surface which is inclined upwards and smoothly transits.

9. The acoustic energy ash remover for boiler heating surface as claimed in claim 1, wherein: the adjusting valve is a tooth-shaped adjustable valve, and the tooth-shaped adjustable valve is positioned above the sounding mechanism.

10. The acoustic energy ash remover for boiler heating surface as claimed in claim 9, wherein: the tooth-shaped adjustable valve comprises tooth-shaped plates, a pull rod and a bolt for locking and positioning, the two tooth-shaped plates are relatively inserted into the side wall of the air outlet hole, the pull rod penetrates through the side wall of the air outlet hole and is connected with the tooth-shaped plates, and the bolt penetrates through the side wall of the air outlet hole and is abutted to the pull rod.

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