CN115451419A

CN115451419A - High-sharing type composite gas wave soot blowing system and soot blowing method

Info

Publication number: CN115451419A
Application number: CN202211307569.3A
Authority: CN
Inventors: 曹义东; 曹一鸣
Original assignee: Beijing Gaozhan Science & Tech
Current assignee: Beijing Gaozhan Science & Tech
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2022-12-09

Abstract

The invention provides a high-sharing composite gas wave soot blowing system and a soot blowing method, wherein the soot blowing system comprises a plurality of gas wave generators, a plurality of emission assemblies and a controller; a plurality of gas wave generators are arranged in parallel through a main pipeline; the transmitting assembly is connected with the main pipeline; the controller is respectively connected with a plurality of gas wave generators; the controller controls several gas wave generators to work continuously according to set time interval, several gas waves emitted by several gas wave generators are compounded into new compound wave with certain frequency, and the compound wave is transmitted into boiler flue through emission assembly to blow soot. The invention has the main beneficial effects that a new composite wave is compounded for the gas wave soot blowing system, and the soot blowing effect can be further enhanced on the basis of the soot blowing effect generated by the original gas wave.

Description

High-sharing type composite gas wave soot blowing system and soot blowing method

Technical Field

The invention relates to the technical field of boiler soot blowers, in particular to a high-sharing type composite gas wave soot blowing system and a soot blowing method.

Background

The soot blower belongs to an auxiliary boiler and has the functions of blowing off accumulated soot on a heating surface of a boiler in the running process of the boiler, reducing smoke resistance and improving heat exchange efficiency. The soot blowing effect of the soot blower directly influences the operation load and the thermal efficiency of the boiler, and has very important significance on the normal operation and the economic benefit of the boiler. Outside the oil gas removing boiler, most of power generation/heat supply boilers taking coal, biomass, garbage and the like as fuels and most of industrial waste heat boilers need to be provided with soot blowers.

The boiler soot blowers are of various types, and the more common types include steam soot blowers, hydraulic soot blowers, sound wave soot blowers, explosion pulse shock wave soot blowers, gas gun type pulse shock wave soot blowers and the like.

The soot blowing medium of the sound wave soot blower is sound wave, the soot blowing medium of the pulse shock wave soot blower is compression shock wave, and both the sound wave and the compression shock wave belong to space energy wave propagating in gas medium, so that the sound wave soot blower and the pulse shock wave soot blower belong to gas propagation wave, which can be referred to as gas wave for short. Therefore, whether a sonic or pulsed shock sootblower, or other type of spatial energy sootblower that may later appear to propagate in a gaseous medium, may be collectively referred to as a gas sootblower.

The sound wave soot blower was invented by Swedish people in the sixties of the last century, and is introduced into China in the later period, the main soot blowing mechanism is that when the sound wave frequency is close to the inherent frequency of soot deposition, the soot deposition resonance is triggered to loosen and fall off, and the sound wave can force the tiny fly ash particles in the flue gas to fly along with the sound wave to a certain extent and is not easy to deposit.

At present, the acoustic wave soot blower mainly has three types of resonant cavities, namely a Hardman whistle type, a diaphragm type and a rotary whistle type. Except for the resonant cavity type sound wave generator which is sometimes used alone, most of the sound wave soot blowers at least comprise two parts, namely a sound wave generator and a sound wave amplifier.

The existing sound wave soot blowing system is generally that a complete sound wave soot blower is configured at a soot blowing point, and the number of sound wave generators is too large. Under the constraint of intense price competition, the practical influence caused by the method is as follows: the sound wave soot blower is simplified and reduced more and more, so that the sound power and sound intensity are reduced more and more, the soot blowing effect is poorer and more, and the technical progress, the industry development and the market application of the sound wave soot blower are seriously restricted.

The explosion pulse shock wave soot blower is also called as deflagration pulse shock wave soot blower, thermal explosion pulse shock wave soot blower, weak explosion pulse shock wave soot blower, deflagration shock wave soot blower, explosion shock wave soot blower and the like, and is called as deflagration soot blower, thermal explosion soot blower, weak explosion soot blower, pulse soot blower, shock wave soot blower, explosion wave soot blower and the like for short, belongs to a new soot blower, is invented by Ukran for the earliest time, and has only twenty years of development history in China. The soot blower mainly performs soot blowing by means of comprehensive effects of impact of compression shock waves generated by explosion of premixed combustible gas and the like, and because the shock waves do not cause serious scouring and abrasion on heating surfaces of a boiler tube bundle and the like in the case of steam soot blowing, the soot blower is relatively low in manufacturing cost, low in failure rate and low in operating cost, and the soot blower is quite popular at present.

The explosion pulse shock wave soot blower mainly comprises an explosion pulse shock wave generator and a nozzle:

the explosion pulse shock wave generator, also called pulse generator, shock wave generator, etc., also called explosion tank, deflagration tank, explosion tank, thermal explosion tank, etc., is the place where combustible premixed gas or other explosion agent is exploded, and also is the most important part of the explosion pulse shock wave soot blower, and is generally installed outside the furnace wall of the boiler.

The outlet of the nozzle is penetrated through the furnace wall and extended into the flue of the boiler, the inlet is connected with the outlet of the pulse shock wave generator directly or through the shock wave guide tube, and the compressed shock wave generated by the pulse shock wave generator is transmitted into the flue of the boiler through the nozzle to blow the soot.

The existing blast pulse shock wave soot-blowing system is generally that a soot-blowing point is provided with a blast pulse impulse generator, the number of the blast pulse impulse generators is too large, the occupation ratio in the total cost is large, and the actual influence caused by the blast pulse impulse generator under the constraint of intense price competition is as follows: on one hand, the explosion pulse shock wave generator is more and more simplified and reduced, so that the explosion energy is less and less, the explosion strength is less and less, the soot blowing effect of the explosion compression shock wave is poorer and less, the nozzle is required to face the boiler tube bundle, soot blowing is mainly performed by using the blowing action of high-speed pulse airflow generated by explosion, the blowing range is very limited, the boiler tube bundle is seriously scoured and worn, the boiler is further subjected to a 'tube explosion' accident, and the majority of users are inscribable; on the other hand, the situation also seriously hinders the research and development enthusiasm of manufacturers on the blasting pulse shock wave generator, and also restricts the technical progress, the industry development and the market application of the blasting pulse shock wave soot blower.

The gas gun type pulse shock wave soot blower is also called as gas energy pulse shock wave soot blower, is evolved by domestic science and technology personnel through an air gun, mainly comprises a gas gun type pulse shock wave generator and a nozzle, the gas gun type pulse shock wave generator mainly comprises a pressure container and a pulse valve, soot blowing is carried out by utilizing the comprehensive effects of instantaneous opening of the pulse valve, instantaneous release of pressure gas to generate compression shock waves, impact of the compression shock waves and the like, and the pressure gas comprises steam, compressed air, compressed nitrogen and the like. Compared with an explosion pulse shock wave soot blower, the explosion pulse shock wave soot blower has the advantages that gas is not needed, so that the explosion pulse shock wave soot blower is safer, the opening of a pulse valve belongs to mechanical action, the action speed of the pulse valve is different from the explosion speed of the explosion pulse shock wave soot blower by orders of magnitude, so that the generated compression shock wave is not strong, the soot blowing effect of the compression shock wave is not obvious enough, soot blowing is performed by means of direct blowing of suddenly ejected air flow, the blowing range is limited, and the boiler tube bundle is easily subjected to 'tube explosion' due to scouring and abrasion, so that the explosion pulse shock wave soot blower is not adopted.

The nozzle of the gas gun type pulse shock wave soot blower is also called as a spray pipe and is basically the same as the nozzle of the explosion pulse shock wave soot blower.

The existing gas gun type pulse shock wave soot blowing system is generally that a soot blowing point is provided with a gas gun type pulse shock wave generator, the number of the pulse shock wave generators is too large, the ratio of the pulse shock wave generators in the total manufacturing cost is large, and the actual influence caused by the strong price competition is as follows: on one hand, the pressure vessel is increasingly reduced, thinner and thinner, and the safety is increasingly poor, the diameter of the pulse valve is increasingly smaller, the pulse valve is increasingly simplified, the internal leakage is easier and easier, the failure rate is higher and higher, the maintenance and operation cost is higher and higher, and the operation stability and the soot blowing effect are increasingly poor; on the other hand, the situation also seriously hinders the research and development enthusiasm of manufacturers on the gas gun type pulse shock wave soot blower, particularly on the pulse valve, and also restricts the technical progress, the industry development and the market application of the gas gun type pulse shock wave soot blower.

The existing gas wave soot blower, no matter a pulse shock wave soot blower or a sound wave soot blower, can only utilize gas waves emitted by gas wave generators to blow soot, and cannot utilize the gas waves emitted by a plurality of gas wave generators to generate new gas waves except reflected waves and diffracted waves, so that the soot blowing effect is further enhanced on the basis of the original gas waves.

Disclosure of Invention

The invention aims to provide a highly-shared composite gas wave soot blowing system and a soot blowing method, so as to solve at least one technical problem in the prior art.

In order to solve the technical problem, the highly-shared composite gas wave soot blowing system provided by the invention comprises: a plurality of gas wave generators, a plurality of emission assemblies and a controller;

a plurality of gas wave generators are arranged in parallel through a main pipeline;

the transmitting assembly is connected with the main pipeline;

the controller is respectively connected with a plurality of gas wave generators; the controller controls a plurality of gas wave generators to work continuously according to a set time interval, a plurality of gas waves emitted by the plurality of gas wave generators are compounded into a new compound wave with a certain frequency, and the compound wave is transmitted into a boiler flue through the emission assembly to blow soot.

In this application, "a number" means two or more.

Further, the time interval is greater than or equal to 1/2000 second and less than or equal to 1/30 second.

Further, the transmission assembly comprises a valve and a transmitter;

the valve is used for controlling the on-off of the guide pipe between the emitter and the gas wave generator.

Further, the gas wave generator is a pulse impulse wave generator, and the pulse impulse wave generator is one or two of a combustion pulse impulse wave generator and a gas gun type pulse impulse wave generator.

Further, the gas wave generator is an acoustic wave generator (or comprises a diffuser); the gas wave generator comprises one or more acoustic wave generators.

Preferably, the gas wave generator comprises a plurality of sound wave generators, and the frequencies of the sound wave generators of the plurality are identical or substantially identical.

Furthermore, the device also comprises a sealing fan, wherein an outlet of the sealing fan is communicated with the main pipeline and is used for filling sealing protection wind into the main pipeline.

Preferably, the sealing fans are multiple.

Furthermore, the main pipeline is also communicated with a positive pressure wind source and used for filling sealing protection wind into the main pipeline.

Further, the valve is a pneumatic valve; and a pneumatic control solenoid valve of the pneumatic valve is arranged outside the gas wave generator, the guide pipe and the emission assembly, and the pneumatic control solenoid valve is connected with the pneumatic valve through a hose.

Furthermore, the valve is an electric rotary switch valve, the electric rotary switch valve mainly comprises an electric rotary actuator and a valve body, the electric rotary actuator is installed outside the gas wave generator, the guide pipe and the emission assembly, and the electric rotary actuator is connected with the valve body through a flexible shaft to drive the valve body to be opened and closed.

The gas wave generator is a sound wave generator or a sound wave generator plus a sound wave amplifier, and the emitter is a sound wave amplifier or a sound wave emitting port; or the gas wave generator is a pulse wave generator, and the emitter is a nozzle.

Preferably, the pulse shock wave soot-blowing system is an explosion pulse shock wave soot-blowing system, and the pulse impulse generator is an explosion pulse impulse generator.

The device further comprises a controller, wherein the controller is connected with the valves and is used for selectively opening and closing one or more valves during soot blowing.

Preferably, the transmitter is connected with the main pipeline through a branch pipe; the valve is arranged on the branch pipe or on a node of the branch pipe and the main pipeline.

Further, the valve is a straight tube plunger slide valve, comprising: a valve body, a plunger and a driving mechanism;

the valve body is a pipe body, the valve body is arranged on the main pipeline as a connecting node, and two ports of the pipe body of the valve body are respectively connected with the main pipelines on two sides;

an opening is formed in the side wall of the valve body; the emitter is connected to the opening;

the plunger is slidably arranged in the valve body, the opening is arranged in the moving range of the plunger, and the outer side surface of the plunger and the inner side wall of the valve body are arranged in a sliding and sealing manner;

the plunger is tubular, and a through hole is formed in the middle of the plunger and used for gas waves to pass through;

the controller is connected with the plunger through a driving mechanism and is used for driving the plunger to move so as to open and close the opening.

In the application, one end of the valve body (tube body) is provided with an inlet, and the other end of the valve body (tube body) is provided with an outlet; the valve body is connected in series on the main pipeline, and gas waves flow in through the inlet of the valve body, pass through the tube cavity of the valve body and the through hole in the middle of the plunger and then flow out from the outlet. When the plunger moves to open the opening, at least part of the working medium flows out through the opening and is then ejected through the emitter.

Furthermore, limit structures are arranged in the valve body and on two sides of the plunger and used for limiting the moving stroke of the plunger.

Furthermore, the limiting structure is a limiting pin, a limiting boss and the like arranged in the valve body.

Further, the device also comprises a position sensor; the two position sensors are respectively arranged in the valve body and on two sides of the plunger and are used for monitoring the moving position of the plunger; and the controller is respectively connected with the position sensor and the driving mechanism and acquires the position of the plunger according to feedback information of the position sensor.

Furthermore, the valve also comprises a wing plate, and a slit is arranged on the side wall of the valve body along the length direction; the inner side end of the wing plate is fixedly connected with the plunger, and the outer side end of the wing plate extends out of the slit and is connected with the driving mechanism.

Wherein, the driving mechanism drives the plunger to move back and forth through the wing plate.

Furthermore, the inner side end of the wing plate is fixedly connected to the middle of the plunger, and the length of the plunger on two sides of the inner side end of the wing plate is larger than that of the slit, so that the slit is always covered when the plunger moves back and forth.

Further, a protective cover is arranged outside the valve body and the slit and used for covering the slit and part or all of the driving mechanism from the outside.

Furthermore, the driving mechanism is an electric, pneumatic or hydraulic telescopic mechanism.

Furthermore, the telescopic mechanism is completely arranged in the protective housing, and the telescopic end of the telescopic mechanism is connected with the outer end of the wing plate;

or the main body of the telescopic mechanism is arranged outside the protective housing, and the telescopic end of the telescopic mechanism extends into the protective housing from the outside through a via hole in the protective housing and is connected with the outer side end of the wing plate.

Further, telescopic machanism sets up inside the valve body, telescopic machanism's flexible end with the plunger is connected.

Further, the driving mechanism comprises a rotating mechanism and a transmission mechanism; the transmission structure includes: the gear and a tooth structure (similar to a rack structure) arranged outside the plunger along the length direction; the side wall of the valve body is provided with a window, the gear extends into the window from the outside and is meshed with the tooth structure, and the rotating mechanism drives the plunger to reciprocate through the gear and the tooth structure.

Further, the gear is rotatably arranged in the protective housing through a support;

the rotating mechanism is arranged in the protective housing, and a power output shaft of the rotating mechanism is connected with the gear;

or the rotating mechanism is arranged in the protective housing, and a power output shaft of the rotating mechanism extends into the protective housing through a flexible shaft and is connected with the gear.

Preferably, the outer side of the plunger is sleeved with a sealing ring, so that the sealing state of the sliding process between the plunger and the valve body is realized, and air leakage is avoided.

Further, the number of the openings is one or a plurality of;

the plurality of openings are distributed at intervals in the circumferential direction of the valve body;

and/or, a plurality of openings are arranged at intervals in the moving direction of the plunger.

Furthermore, the inner cavity of the valve body comprises a conical section, the inner wall of the conical section is in a horn mouth shape (frustum shape) with the inner diameter gradually reduced in the direction away from the plunger, and the outer circular surface of the end part of the plunger is in a frustum shape matched with the conical section.

The conical section is matched with the end part of the plunger, so that the sealing performance of the plunger and the valve body at the limit positions at two ends or one end of the stroke can be improved.

Further, the opening is provided on the tapered section.

And the telescopic mechanism is arranged in the protective housing and is connected with the outer side of the protective housing through a pipeline or a pipeline.

The straight-tube plunger slide valve disclosed by the invention is simple and reliable and has lower manufacturing cost; and the valve can be used not only for a pulse shock wave soot blower, but also for a fluid or material on-off valve with relaxed sealing requirements.

Further, the valve is an outer stem three-way angle seat valve, which includes: the three-way valve body, the valve clack and the telescoping mechanism;

the three-way valve body comprises: a first port, a second port, and a third port;

a valve seat matched with the valve clack is arranged in the first port;

the valve clack is slidably arranged in the three-way valve body in a direction close to and away from the valve seat;

the telescopic mechanism is connected with the valve clack and is used for driving the valve clack to move so as to open and close the first port;

the outer valve stem three-way angle seat valve is arranged on the main pipeline as a communication node; the second port and the third port are used as an inlet and an outlet and are respectively communicated with main pipelines at two sides; the first port is connected to the transmitter.

Furthermore, the whole tee valve body is T-shaped, and the second port and the third port are coaxially and oppositely arranged; the first port is arranged perpendicular to the second port and the third port.

Furthermore, the valve also comprises a wing plate, and a slit is arranged on the side wall of the three-way valve body along the direction close to and far away from the valve seat; the inner side end of the wing plate is fixedly connected with the valve clack, and the outer side end of the wing plate extends out of the slit and is connected with the telescopic mechanism. Wherein, telescopic machanism passes through the pterygoid lamina and drives the valve clack reciprocating motion.

Further, a protective cover shell is arranged outside the slit and used for covering the slit and part or all of the telescopic mechanism from the outside.

Furthermore, the telescopic mechanism is an electric, pneumatic or hydraulic telescopic mechanism.

Furthermore, the telescopic mechanism is completely arranged in the protective housing, and a telescopic end of the telescopic mechanism is connected with the outer side end of the wing plate;

or the main body of the telescopic mechanism is arranged outside the protective housing, and the telescopic end of the telescopic mechanism extends into the protective housing from the outside through a via hole in the protective housing and is connected with the outer side end of the wing plate. Wherein, a sealing structure is arranged between the via hole and the telescopic end of the telescopic mechanism.

Further, the valve clack is plunger-shaped; or the cross section of the valve clack is U-shaped (or front disc-shaped);

a sealing working end face is arranged on one side of the valve seat of the valve clack; and a sealing end face matched with the sealing working end face is arranged on one side of the valve clack of the valve seat.

And in the valve closing state, metal hard seal is formed between the valve clack and the valve seat.

Further, a soft sealing element is arranged on one side of the valve seat of the valve clack; and a pressure plate is fixed on the end surface of the outer side of the soft sealing element, and the outer diameter of the pressure plate is smaller than the inner diameter of the valve seat.

Further, the soft sealing element is a rubber element, a polytetrafluoroethylene plastic element (or other plastic elements) or a ceramic fiber element.

Furthermore, the valve clack is provided with a frustum part on one side of the valve seat, and the inner hole of the valve seat is in a horn mouth shape matched with the frustum part in a sealing mode.

The device further comprises a controller, a first position sensor and a second position sensor, wherein the first position sensor and the second position sensor are respectively arranged in the protective housing and at two ends of the stroke of the wing plate; the controller is respectively connected with the first position sensor, the second position sensor and the telescopic mechanism, and determines the position information of the valve clack according to the feedback information of the first position sensor and the second position sensor; the controller controls the valve clack to reciprocate through the telescopic mechanism.

Further, the valve is a straight-through plunger valve comprising: the valve body, the plunger and the telescopic mechanism;

the valve body comprises a piston cavity and a medium channel which are crossed with each other and are communicated with each other;

the plunger is slidably disposed within the piston cavity;

the telescopic end of the telescopic mechanism extends into the piston cavity from one end of the piston cavity to be connected with the plunger, and is used for driving the plunger to slide back and forth in the piston cavity, extend into or exit from the medium channel, and further plugging or opening the medium channel;

the piston cavity and the medium channel are arranged vertically to each other;

one end of the medium channel is connected with the main pipeline, and the other end of the medium channel is connected with the emitter.

Further, the piston cavity comprises a conical section, and the conical section axially contains (covers) a junction port of the piston cavity and the medium channel; the front end of the plunger is of a frustum shape matched with the conical section in a sealing mode.

Further, one end of the piston cavity far away from the junction port comprises a straight cylinder section; the aperture of the straight cylinder section is consistent with the maximum outer diameter of the plunger.

Furthermore, the valve body is a four-way round pipe, and two ends of the piston cavity comprise a third port and a fourth port; the third port and the fourth port are respectively blocked by using blind plates;

and the telescopic end of the telescopic mechanism extends into the piston cavity through a through hole in one of the blind plates and is connected with the plunger.

Further, the plunger is in a shape of a circular tube.

Furthermore, the valve body is a T-shaped three-way pipe fitting, one end of the piston cavity is communicated with the medium channel, and the other end of the piston cavity is blocked by a blind plate; the telescopic end of the telescopic mechanism extends into the piston cavity through a through hole on the blind plate and is connected with the plunger;

the lower end of the plunger is hemispherical, and the plunger extends out of the piston cavity to abut against the side wall of the medium channel and then cuts off the medium channel.

Further, the main body of the telescopic mechanism is fixed on the blind plate.

The device further comprises a controller, a first position sensor and a second position sensor, wherein the first position sensor and the second position sensor are used for detecting the plunger stroke position information; the controller is respectively connected with the first position sensor, the second position sensor and the telescopic mechanism, and determines the position information of the plunger according to the feedback information of the first position sensor and the second position sensor; the controller controls the moving stroke of the plunger through the telescopic mechanism.

Preferably, a magnetic ring is arranged on an inner side end (such as a piston of a cylinder) of the telescopic end arranged in the telescopic mechanism main body, and the first position sensor and the second position sensor are magnetic induction sensors arranged on the main body.

In addition, the application also discloses a high-sharing composite gas wave soot blowing method which comprises a plurality of gas wave generators, a plurality of emission assemblies and a controller; a plurality of gas wave generators are arranged in parallel through a main pipeline; the transmitting assembly is connected with the main pipeline; the controller is respectively connected with a plurality of gas wave generators; the controller controls a plurality of gas wave generators to work continuously according to a set time interval, a plurality of gas waves emitted by the plurality of gas wave generators are compounded to form a new compound wave with a certain frequency, and the compound wave is transmitted into a boiler flue through the transmitting assembly to perform soot blowing.

By adopting the technical scheme, the invention has the following beneficial effects:

originally, connect into a controllable system through pipe and valve with original isolated gas wave transmitter or transmitter group separately creatively, and then can let all gas wave transmitters in the system share a plurality of and/or multiple gas wave generator, broken through the barrier between the gas wave soot blower of different grade type, opened up very wide technological innovation space and use innovation space for the development of gas wave soot-blowing system, not only can reduce the quantity of required gas wave generator by a wide margin, can also improve greatly and blow the soot effect, and obtain a series of other beneficial effects:

firstly, the most important is that a plurality of gas waves generated by a plurality of gas wave generators continuously working according to a set time interval are compounded to form a new compound wave with a certain frequency, and on the basis of the original gas wave soot blowing, the newly formed compound wave is used for further soot blowing, so that the soot blowing effect is further enhanced:

(1) For the pulse shock wave soot blower, a plurality of pulse shock wave generators continuously work according to a set time interval to send out a plurality of compression shock waves, besides direct soot blowing by using the impact action of the compression shock waves, the plurality of compression shock waves continuously generated according to the set time interval also form the shock wave with the frequency of the reciprocal of the interval time, the shock wave is a continuous wave consisting of single shock waves, belongs to the wave, is a wave of a higher level, can be called as a compound wave, and can also be called as a second-order wave. The newly generated second-order wave has a new soot blowing mechanism completely different from the original compression shock wave soot blowing mechanism: on one hand, as the resonance ash removal mechanism of the sound wave with similar frequency, when the frequency of the second order wave is close to the inherent frequency of the deposited ash of the boiler, the deposited ash can be caused to resonate to cause the deposited ash to fall off; on the other hand, the "sound pressure" of the second-order wave is actually the overpressure of the compression shock wave, which is much larger than the overpressure of the sound wave, for example, by one or two orders of magnitude, so that the amplitude of the ash deposition resonance caused by the sound wave is many times larger than that of the sound wave, and the soot blowing effect generated by the sound wave is many times larger; on the other hand, the second-order wave is closely followed by the original compression shock wave, and has a synergistic effect with the original compression shock wave, so that the soot blowing effect can be further enhanced.

(2) For the acoustic wave soot blower, when N acoustic wave generators with the frequency of f Hz are continuously started according to the time interval of 1/fN seconds, N acoustic waves with the phase difference of 1/fN seconds and the frequency of f Hz are generated, a new acoustic wave with the frequency of Nf Hz can be formed, and the boiler soot with the natural frequency close to Nf Hz can be effectively blown. In addition, because N sound waves are generated by N sound sources, besides the soot blowing effect of the original sound waves with the frequency of f hertz, the sound pressure superposition effect exists at the spatial point, and the maximum sound pressure of the new sound waves with the frequency of Nf hertz is the superposition sound pressure, so the soot blowing effect is better.

For the acoustic wave soot blowing system:

(1) The number of the sound wave generators or the sound wave generators and part or all of the amplifiers required by the sound wave soot blowing system can be greatly reduced, a great cost space is created for manufacturers to adopt better sound wave generators and amplifiers, the research and development enthusiasm of the manufacturers on the sound wave generators and the amplifiers is inevitably improved, a wide economic space is provided for the research and development of the sound wave generators and the amplifiers, and finally the technical progress, the industry development and the market application of the sound wave soot blower are inevitably promoted greatly.

(2) Manufacturers use better sound generators and amplifiers, which means larger sound power (the sound power refers to the total energy of sound waves radiated to the space by a sound source in unit time and is measured in W) and larger sound intensity (the sound intensity refers to the sound wave energy passing through a unit area perpendicular to the propagation direction of the sound waves in unit time, namely the energy flow density of the sound waves and is measured in watt/square meter), which means larger effective soot blowing range and better soot blowing effect, and also means higher reliability and longer service life.

(3) When a plurality of sound wave generators are adopted, each or each group of emitters can select whether to adopt 1 sound wave generator to blow soot or adopt 2 or more sound wave generators to blow soot simultaneously according to specific needs. When 2 or more sound generators are used for simultaneously blowing dust and only a valve of one transmitter is opened, the single transmitter can obtain the added sound power and sound intensity, and the sound pressure superposition effect can be generated, so that the effective dust blowing range and the dust blowing effect of the single transmitter are greatly improved, and the number of dust blowing point positions can be greatly reduced, for example, one third, one half or even more is reduced.

(4) When 2 or more sound wave generators are used for simultaneously blowing soot and valves of 2 or more emitters are simultaneously opened during soot blowing, the time for carrying out one-time soot blowing operation of the whole system can be greatly shortened, for example, the time is shortened to be half, one third or even shorter.

(5) The cost of the sound wave soot blowing system can be obviously reduced as long as the valve for controlling the on-off of the emitter is properly selected.

(6) Due to the existence of the shielding and sealing protection wind of the valve and the far away from the emitter, the problems that the smoke and the fly ash in the smoke enter the sound wave generator and the connected diffuser thereof due to heat convection, diffusion or positive pressure of the smoke channel during the period of no soot blowing, and the fly ash is corroded by acid condensation and dew water and is stained with the ash and blocked are avoided, the famous 'old and difficult' problem of the sound wave soot blower is solved at one stroke, the working reliability and the effect stability of the sound wave soot blower are fundamentally improved, and the service life of the sound wave soot blower is prolonged.

(7) Because the problem of the famous 'old and difficult' that the sound wave generator and the amplifier connected with the sound wave generator are corroded by acid dew and are stuck with ash and blocked ash is solved at one stroke, the sound wave generator and the amplifier connected with the sound wave generator can not adopt corrosion-resistant materials such as stainless steel and the like.

(8) The rotary flute type acoustic wave soot blower solves the famous 'old and difficult' problem that the sonic generator and the amplifier connected with the sonic generator are corroded by the acid dew water, stained with ash and blocked with ash at one stroke, and can be widely applied to the rotary flute type acoustic wave soot blower which is most seriously troubled by the problem.

(9) For a resonant cavity type sound wave generator, the system does not need to extend into a flue of a boiler any more, so that soot blowing is carried out in a high-temperature area, and expensive high-temperature-resistant stainless steel materials are not needed.

(II) for the explosion pulse shock wave soot-blowing system:

(1) The number of the blasting pulse impulse generators in the blasting pulse shock wave soot-blowing system can be greatly reduced, a great cost-increasing space is created for manufacturers to adopt better blasting pulse impulse generators, the research and development enthusiasm of the manufacturers on the blasting pulse impulse generators is inevitably improved, and finally the technical progress, the industry development and the market application of the blasting pulse shock wave soot-blowing device are inevitably promoted.

(2) Manufacturers adopt better blast pulse impulse generators, which means that various configurations of the blast pulse impulse generators are strengthened, the blast energy and the blast intensity of the blast pulse impulse generators are increased, the effective soot blowing range and the soot blowing effect of the blast pulse impulse soot blowing system are greatly improved, and the blast pulse impulse generator system also means higher safety, stability and reliability and longer service life.

(3) When a plurality of blasting pulse impulse generators are adopted, 1 blasting pulse impulse generator can be adopted for blasting or 2 or more blasting pulse impulse generators can be adopted for blasting at the same time for each or each group of soot blowing points according to specific requirements. When 2 or more blasting pulse impulse generators are used for simultaneous blasting and only a valve of one nozzle is opened, the single nozzle can obtain the added blasting energy, and the overpressure superposition effect of compression shock waves can be generated, so that the effective soot blowing range and soot blowing effect of the single nozzle are greatly improved, and the number of soot blowing points can be greatly reduced, such as one third, one half and even more.

(4) When 2 or more blasting pulse impulse generators are adopted for simultaneously blowing soot, and valves of 2 or more emitters are simultaneously opened during soot blowing, the time of performing one-time soot blowing operation on the whole system can be greatly shortened, for example, the time is shortened to one half, one third or even shorter time.

(5) The installation occupation space of the explosion pulse shock wave soot blowing system is greatly reduced, and the soot blowing point location arrangement is more convenient and flexible.

(6) The transportation and installation cost of the blasting pulse shock wave soot-blowing system is greatly reduced.

(7) The cost of the blast pulse shock wave soot-blowing system can be obviously reduced as long as the valve for controlling the on-off of the nozzle or the nozzle group is properly selected.

(8) And the valve which is more suitable for controlling the on-off of the nozzle or the nozzle group is necessarily attracted to be researched and developed by manufacturers.

(9) Because the attenuation of instantaneous high-speed pulse airflow generated by blasting in the shock wave guide pipe is serious, the blasting pulse shock wave soot-blowing system inevitably and obviously reduces the speed of the pulse airflow ejected from the nozzle, thereby obviously reducing the hazard of the pulse airflow.

(10) Compared with the prior art, the air quantity of the sealing protection required in the period of no soot blowing is greatly reduced due to the shielding of the valve, and the reduction range is up to more than 90 percent.

(III) for a gas gun type pulse shock wave soot blowing system:

(1) The number of the gas gun type pulse shock wave generators in the gas gun type pulse shock wave soot blowing system can be greatly reduced, a great cost increase space is created for manufacturers to adopt better gas gun type pulse shock wave generators, particularly better pulse valves, the research and development enthusiasm of the manufacturers on the gas gun type pulse shock wave generators, particularly the pulse valves is inevitably improved, and finally the technical progress, the industry development and the market application of the gas gun type pulse shock wave soot blowers, particularly the pulse valves are inevitably promoted.

(2) Manufacturers adopt better gas gun type pulse impulse wave generators, which means to strengthen various configurations of the gas gun type pulse impulse wave generators, and further improve the safety, stability, reliability, effective soot blowing range and soot blowing effect of the gas gun type pulse impulse wave generators.

(3) When a plurality of gas gun type pulse shock wave generators are adopted, each or each group of soot blowing point positions can select to adopt 1 gas gun type pulse shock wave generator to blow soot or adopt 2 or more gas gun type pulse shock wave generators to blow soot simultaneously according to specific requirements. When 2 or more gas gun type pulse shock wave generators are used for simultaneously blowing dust and only a valve of one nozzle is opened, the single nozzle can obtain the added dust blowing energy, and the overpressure superposition effect of the compression shock wave can be generated, so that the effective dust blowing range and the dust blowing effect of the single nozzle are greatly improved, the defects that the compression shock wave generated by the gas gun type pulse shock wave emitter is not strong and the dust blowing effect of the compression shock wave is not obvious are overcome, and the application range of the gas gun type pulse shock wave emitter is expanded.

(3) The installation occupation space of the gas gun type pulse shock wave soot blowing system is greatly reduced, and the soot blowing point location arrangement is more convenient and flexible.

(4) The transportation and installation cost of the gas gun type pulse shock wave soot blowing system is greatly reduced.

(5) The cost of the gas gun type pulse shock wave soot blowing system can be obviously reduced as long as the valve for controlling the on-off of the nozzles or the nozzle groups is properly selected.

(6) And the valve which is more suitable for controlling the on-off of the nozzle or the nozzle group is necessarily attracted to be researched and developed by manufacturers.

Drawings

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

FIG. 1 is a schematic perspective view of a highly shared composite gas wave soot blowing system provided in example 1;

FIG. 2 is a system diagram of a highly shared composite gas wave soot blowing system provided in embodiment 2;

FIG. 3 is a schematic perspective view of a highly shared composite gas wave soot blowing system provided in example 3;

FIG. 4 is a front view of the straight tube plunger slide valve provided in embodiment 4;

FIG. 5 is a top cross-sectional view of the straight tube plunger spool valve shown in FIG. 4;

FIG. 6 is a cross-sectional AA view of FIG. 4;

FIG. 7 is a front view of the straight tube plunger slide valve used to control the opening and closing of the nozzle provided in example 5;

FIG. 8 is a top plan view of the straight tube plunger slide valve shown in FIG. 7;

FIG. 9 is a cross-sectional view BB of FIG. 7;

FIG. 10 is a front view of a straight tube plunger slide valve that can be used to control the opening and closing of the nozzle as provided in example 6;

FIG. 11 is a top cross-sectional view of the straight tube plunger spool valve shown in FIG. 10;

FIG. 12 is a cross-sectional view CC of FIG. 10;

fig. 13 is a schematic structural view of a straight-tube plunger slide valve when the rotating mechanism provided in embodiment 6 is disposed outside a protective casing;

FIG. 14 is a front view of a straight tube plunger slide valve that can be used to control the opening and closing of the nozzle as provided in example 7 of the present invention;

FIG. 15 is a top cross-sectional view of the straight tube plunger slide valve shown in FIG. 14;

FIG. 16 is a side view of the straight tube plunger slide valve shown in FIG. 14;

FIG. 17 is a front view of the straight tube plunger slide valve used to control opening and closing of the nozzle provided in example 8;

FIG. 18 is a front view of an outer stem three-way angle seat valve provided in example 9;

FIG. 19 is a top view of the outer stem three-way angle seat valve of FIG. 18;

FIG. 20 is a schematic diagram of the construction of another embodiment of the outer stem three-way angle seat valve of example 9;

FIG. 21 is a schematic view of a through-type spool valve provided in accordance with embodiment 10 of the present invention;

FIG. 22 is a side elevational view of the straight through plug valve illustrated in FIG. 10;

FIG. 23 is a schematic view of a straight-through plug valve according to example 11 of the present invention;

FIG. 24 is a schematic view of a through-type spool valve according to embodiment 12 of the present invention;

FIG. 25 is a side view of the straight through plug valve of FIG. 24.

Reference numerals:

100-gas wave generator; through a 200-catheter; 220-main pipe; 210-a branch pipe; 103-acoustic expander a section; 104-acoustic expander B section; 107-resonant cavity acoustic wave generator; 108-a diaphragm sound generator; 300-a transmitter; 400-a valve; 500-sealing the fan; 600-a valve body; 601-a first port; 602-a second port; 603-a third port; 604-a fourth port; 605-a first position sensor; 606-a second position sensor; 607-window; 608-a slit; 609-a limit pin; 610-an opening; 610A-first set of openings; 610B-a second set of openings; 611-a conical section; 612-straight cylinder section; 620-valve seat; 630-a flange; 640-a blind plate; 650-a media channel; 670-a piston cavity; 700-valve flap; 710-a plunger; 711-tooth structure; 712-plunger conical end; 720-wing plate; 730-a soft seal; 731-pressing plate; 800-a drive mechanism; 810-a telescoping mechanism body; 811-double nipple; 813-flexible pipe; 815-double-end nipple; 817-a control valve; 820-a rotating mechanism; 821-a gear; 822-a flexible shaft; 830-a telescoping section; 900-protective housing.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further explained with reference to specific embodiments.

Example 1

As shown in fig. 1, the present embodiment discloses a highly shared composite gas wave soot blowing system, including: a plurality of gas wave generators 100, a plurality of emission assemblies, and a controller;

the 7 gas wave generators 100 are in communication with the 20 launch assemblies via conduits 200. Specifically, conduit 200 includes a main conduit 220 and a branch conduit 210. The 7 gas wave generators 100 are arranged in parallel through main pipelines 220; the launch assembly is connected to a main conduit 220 by a manifold 210.

The transmitting assembly includes a valve 400 and a transmitter 300; the controller is connected to the valves 400 for selectively opening and closing one or more of the valves 400 during sootblowing. Valve 400 is used to open and close the conduit between emitter 300 and gas wave generator 100.

In this embodiment, the gas wave generator 100 is a burst pulse wave generator, and has a volume of 120 liters, and the emitter 300 is a nozzle.

The controller is also connected to 7 gas wave generators 100, respectively.

During soot blowing, 7 blasting pulse shock wave generators can be controlled by a controller to be continuously blasted within a set time interval (for example, 1/75 second), each blasting pulse shock wave generator generates 1 channel of compression shock wave, and the compression shock wave is transmitted into a flue of a boiler through a transmitting assembly to perform soot blowing. Besides, the 7-th compression shock wave is generated successively according to the time interval of 1/75 second, and then a wave of the compression shock wave with 7 wave crests (namely 7 compression shock waves), 7 wave troughs (namely 7 time intervals of about 1/75 second) and the frequency of 75 Hz is compounded, the wave belonging to the wave is a higher-level wave which can be called a compound wave and can also be called a second-order wave. The newly generated second-order wave has a new soot blowing mechanism completely different from the original compression shock wave soot blowing mechanism: on one hand, as the resonance ash removal mechanism of the sound wave with similar frequency, when the frequency of the second order wave is close to the inherent frequency of the deposited ash of the boiler, the deposited ash can be caused to resonate so as to drop the deposited ash; on the other hand, the "sound pressure" of the second-order wave is actually the overpressure of the compression shock wave, which is much larger than the overpressure of the sound wave, for example, one or two orders of magnitude larger, so that the amplitude of the soot resonance caused by the second-order wave is many times larger than that of the sound wave, and the soot blowing effect generated by the second-order wave is many times larger; on the other hand, the second-order wave is closely followed by the original compression shock wave, and has a synergistic effect with the original compression shock wave, so that the soot blowing effect can be further enhanced.

The embodiment further includes a sealing fan 500, and an outlet of the sealing fan 500 is connected to the main pipeline 220, and is used for filling sealing protection wind into the main pipeline 220.

Whether the soot blowing operation is carried out or not, the sealing fan 500 is always in operation, the inside of the guide pipe 200 is always kept in a certain positive pressure state, certain smoke at the positive pressure flue part at a certain time is prevented from entering the guide pipe 200 through the internal leakage of the valve 400 on the nozzle, and the smoke short circuit caused by the internal leakage of the valve 400 on the nozzle due to the different pressure of the flue section where the nozzle is positioned among the nozzles communicated through the guide pipe 200 can be avoided.

The valve 400 may be an electric rotary switch type valve, which mainly includes an electric rotary actuator and a valve body, the electric rotary actuator may be installed outside the gas wave generator 100, the conduit 200 and the launching assembly, and the electric rotary actuator and the valve body are connected by a flexible shaft to drive the valve body to open and close.

The valve 400 may also be a pneumatic valve, and a pneumatic control solenoid valve may be installed outside the gas wave generator 100, the guide tube 200 and the firing assembly, and connected thereto through a hose.

In this embodiment, the gas wave generator 100 may also be a gas cannon type pulse wave generator.

Example 2

As shown in fig. 2, this embodiment is substantially the same as embodiment 1, except that:

the gas wave generator 100 is 3 membrane type sound wave generators 108 arranged in the middle of a main pipeline 220 and connected with a sound wave amplifier A section 103 and a sound wave amplifier B section 104, and the generation frequency of the 3 membrane type sound wave generators 108 is 50 Hz.

During soot blowing, 2 diaphragm type sound wave generators 108 can be controlled by a controller to be started continuously according to the time interval of 1/100 second according to needs, 2 sound waves with the phase difference of 1/100 second and the frequency of 50 Hz are generated, the 2 sound waves are compounded on a time axis to form a new sound wave with the frequency of 100 Hz, and the boiler soot with the natural frequency close to 100 Hz can be blown effectively. In addition, because 2 sound waves are generated by 2 sound sources (diaphragm type sound wave generators), besides the soot blowing effect of the original sound waves with the frequency of 50 Hz, the sound pressure superposition effect also exists on the space point, the maximum sound pressure of the new sound waves with the frequency of 100 Hz is the superposition sound pressure, and the soot blowing effect is better.

The controller can also control the 3 diaphragm type sound wave generators 108 to be started continuously according to the time interval of 1/150 second, 3 sound waves with the phase difference of 1/150 second and the frequency of 50 Hz are generated, and the 2 sound waves are compounded on a time axis to form a new sound wave with the frequency of 150 Hz, so that the boiler dust deposit with the natural frequency close to 150 Hz can be effectively blown off. In addition, because 3 sound waves are generated by 3 sound sources (diaphragm type sound wave generators), besides the soot blowing effect of the original sound waves with the frequency of 50 Hz, the sound pressure superposition effect also exists on the space point, the maximum sound pressure of the new sound waves with the frequency of 150 Hz is the superposition sound pressure, and the soot blowing effect is better.

Example 3

As shown in fig. 3, the present embodiment is different from embodiment 1 in that: the gas-wave generator 100 also comprises 3 resonant-cavity acoustic-wave generators 107 (and their diffusers) mounted on the right main tube 220.

During soot blowing, the following steps can be performed according to needs: or soot blowing as in example 1; or soot blowing as in example 2; soot blowing can also be performed firstly as in embodiment 1 and then as in embodiment 2, or vice versa; or possibly other arrangements.

Example 4

This example is substantially the same as examples 1 and 3, except that:

the valve 400 in this embodiment is a straight tube plunger spool valve.

As shown in fig. 4-6, the straight tube plunger 710 spool valve includes: valve body 600, plunger 710, and drive mechanism 800; the valve body 600 is a pipe body, the valve body 600 is arranged on the main pipeline 220 as a connection node, and two ports of the pipe body of the valve body 600 are respectively connected with the main pipelines 220 on two sides; an opening 610 is formed in the sidewall of the valve body 600; the emitter 300 is attached to the opening 610.

The plunger 710 is slidably arranged in the valve body 600, the opening 610 is arranged in the moving range of the plunger 710, and the outer side face of the plunger 710 is in sliding sealing arrangement with the inner side wall of the valve body 600; plunger 710 is tubular and a controller is coupled to plunger 710 via drive mechanism 800 for moving plunger 710 to open and close opening 610.

In the present application, an inlet is provided at one end of the valve body 600 (tube body), and an outlet is provided at the other end; the valve body 600 is connected in series on the main pipeline 220, and the gas wave flows in through the inlet of the valve body 600, passes through the tube cavity of the valve body 600 and the through hole in the middle of the plunger 710, and then flows out from the outlet. When the plunger 710 moves to open the opening 610, at least a portion of the working medium flows out through the opening 610 and is then emitted through the emitter 300.

Limiting structures are arranged in the valve body 600 and on two sides of the plunger 710 and used for limiting the moving stroke of the plunger 710. In this embodiment, the limiting structure is two limiting pins 609 arranged in the valve body 600.

The embodiment further comprises a wing plate 720, wherein a slit 608 is arranged on the side wall of the valve body 600 along the length direction; the inner ends of the wings 720 are fixedly connected to the plunger 710, and the outer ends of the wings 720 extend out of the slot 608 and are connected to the driving mechanism 800. Drive mechanism 800 moves plunger 710 back and forth via wing 720. The inner ends of the wings 720 are fixedly connected to the middle of the plunger 710, and the length of the plunger 710 on both sides of the inner ends of the wings 720 is larger than that of the slit 608, so that the plunger 710 is ensured to always cover the slit 608 when moving back and forth.

The valve body 600 and the slit 608 are externally provided with a protective cover 900 for covering the slit 608 and a part or the whole of the drive mechanism 800 from the outside.

The driving mechanism 800 is an electric, pneumatic or hydraulic telescopic mechanism. The main part setting of telescopic machanism is outside at protection housing 900, and telescopic machanism's flexible end stretches into in the protection housing 900 and is connected with pterygoid lamina 720 outside end through the via hole on the protection housing 900 from the outside. A sealing stuffing box assembly is arranged between the telescopic end of the telescopic mechanism and the via hole of the protective housing 900, so that the sealing effect of the protective housing 900 is realized.

Preferably, a sealing ring is sleeved on the outer side of the plunger 710, so that a sealing state in a sliding process between the plunger 710 and the valve body 600 is realized, and air leakage is avoided.

The positive significance of the invention is that:

(1) The invention provides a simple and reliable nozzle on-off control valve with low manufacturing cost for the highly-shared composite pulse shock wave soot blowing system invented by the inventor, and is beneficial to popularization and development of the soot blowing system.

(2) Except for the driving device, the main body only has two simple components of a straight pipe valve body and a straight pipe plunger, the structure is simple, the impact and vibration performance of shock waves and pulse jet flow is good, the reliability is high, and faults are not easy to occur.

(3) Except the driving device, the main body only has two simple parts of a straight pipe valve body and a straight pipe plunger, the structure is simple, and in addition, the inner surface of the straight pipe valve body and the outer surface of the straight pipe plunger adopt clearance fit and have low sealing requirement, so the manufacture is easier and the cost is reduced.

(4) When the valve body is used for the high-sharing composite pulse shock wave soot blowing system invented by the inventor and is of a positive tee joint or positive four-way pipe fitting structure, the valve body can be directly used as a distribution tee joint or a four-way joint of the shock wave guide pipe system, and the manufacturing cost of the shock wave guide pipe system is favorably reduced.

(5) The valve not only can be used for a pulse shock wave soot blower, but also can be used as a valve for switching on and off fluid or material with relaxed sealing requirements.

Example 5

This example is substantially the same as example 4, except that:

as shown in fig. 7, 8 and 9, the present embodiment includes a controller (not shown), a first position sensor 605 and a second position sensor 606; the two position sensors are respectively arranged on the valve body 600 and two sides of the plunger 710 and are used for monitoring the moving position of the plunger 710; the controller is connected to the first position sensor 605, the second position sensor 606, and the driving mechanism 800, respectively, and determines the position information of the plunger 710 according to the feedback information of the position sensors, thereby controlling the reciprocating movement of the plunger 710 through the driving mechanism 800.

The drive mechanism 800 in this application is a cylinder that is disposed inside the protective housing 900. A control valve 817 for controlling the cylinder is provided outside the protective casing 900, the control valve 817 being a pneumatically controlled solenoid valve which is connected to the cylinder via a hose 813 and a double-ended nipple 815. And the main body of the cylinder is fixedly connected with the valve body 600 or the protective cover 900 through a U-shaped pipe clamp or a bracket.

Example 6

This example is substantially the same as example 4, except that:

as shown in fig. 10-12, the driving mechanism 800 in this embodiment includes a rotating mechanism 820 and a transmission structure; the transmission structure includes: a gear 821 and a tooth structure 711 arranged outside the plunger 710 along the length direction, and a similar gear rack structure is connected; the gear 821 is rotatably arranged in the protective cover 900 through a support, a window 607 is arranged on the side wall of the valve body 600, the gear 821 extends into the window 607 from the outside to be meshed with the tooth structure 711, and the rotating mechanism 820 drives the plunger 710 to reciprocate through the gear 821 and the tooth structure 711.

As shown in fig. 10, a rotation mechanism 820 may be disposed within protective enclosure 900, the power output shaft of the rotation mechanism being connected with gear 821; more preferably, referring to fig. 13, the rotating mechanism 820 is disposed in the protective housing 900, and a power output shaft of the rotating mechanism 820 extends into the protective housing 900 through a flexible shaft 822 and then is connected to the gear 821.

Example 7

This example is substantially the same as example 4, except that:

referring to fig. 14-16, the drive mechanism 800 is a telescoping mechanism and is disposed within the valve body 600 with the telescoping end of the telescoping mechanism connected to the plunger 710. The main body of the telescopic mechanism is fixedly arranged on a base in the valve body 600 through a double-end nipple 811.

More preferably, the number of openings 610 is 4; specifically, the openings 610 are divided into two groups, i.e., a first opening group 610A and a second opening group 610B arranged at intervals in the moving direction of the plunger 710; and the first opening group 610A and the second opening group 610B respectively include two openings 610 symmetrically arranged in the circumferential direction of the valve body 600.

The driving mechanism 800 drives the plunger 710 to move, and the two opening groups can be opened and closed alternately; and simultaneously open multiple openings 610 within the same opening group.

One emitter 300 is attached to each opening 610.

Example 8

This example is substantially the same as example 7 except that:

as shown in fig. 17, in the present embodiment, the inner cavity of the valve body 600 includes a tapered section 611, the inner wall of the tapered section 611 is in a flared shape (frustum shape) with an inner diameter gradually decreasing in a direction gradually away from the plunger 710, and the outer circular surface of the end 712 of the plunger 710 is in a frustum shape adapted to the tapered section 611.

The tapered section 611 may be a single section, i.e., disposed on one side of the plunger 710, or the tapered section 611 may be two sections, disposed on both sides of the plunger 710, respectively; the fit of tapered section 611 with end 712 of plunger 710 increases the seal between plunger 710 and valve body 600 at either or both ends of travel.

Wherein preferably the opening 610 is provided from the tapered section 611. Thereby further improving the sealability when the opening 610 is closed.

Example 9

This example is substantially the same as example 4, except that:

as shown in fig. 18 and 19, the valve in this embodiment is an external stem three-way angle seat valve, which includes: a three-way valve body 600, a valve flap 700 and a drive mechanism 800; the valve body 600 includes: a first port 601, a second port 602, and a third port 603; a valve seat 620 fitted with the valve flap 700 is provided in the first port 601; the valve flap 700 is movably disposed within the valve body 600 in directions toward and away from the valve seat 620; the driving mechanism 800 is connected to the valve flap 700 for moving the valve flap 700 to open and close the first port 601. The second port 602 and the third port 603 are connected to the main pipes 220 on both sides, respectively, and the first port 601 is connected to the transmitter 300.

Preferably, the valve body 600 is T-shaped as a whole, and the second port 602 and the third port 603 are coaxially and oppositely arranged; the first port 601 runs perpendicular to the second port 602 and the third port 603. In this embodiment, the valve body 600 is made of a cross-shaped tube, and one of the ports is sealed by using a flange 630 and a blind plate 640.

The present embodiment further includes a wing 720, a slit 608 is disposed on the sidewall of the valve body 600 along the direction approaching to and departing from the valve seat 620; the inner end of the wing 720 is fixedly connected to the flap 700, and the outer end of the wing 720 extends from the slit 608 and is connected to the driving mechanism 800. Wherein, the driving mechanism 800 drives the valve flap 700 to move back and forth through the wing plate 720.

Further, a protective cover 900 is provided outside the slit 608 for covering the slit 608 and a part or the whole of the driving mechanism 800 from the outside. The driving mechanism 800 may be an electric, pneumatic or hydraulic telescopic mechanism, for example, the driving mechanism 800 is an electric pushing cylinder, an air cylinder or a hydraulic cylinder. The telescopic mechanisms are all arranged in the protective housing 900, and telescopic ends 830 of the telescopic mechanisms are connected with outer ends of the wing plates 720; or, the main body of the telescopic mechanism is arranged outside the protective casing 900, and the telescopic end 830 of the telescopic mechanism extends into the protective casing 900 from the outside through a via hole on the protective casing 900 to be connected with the outer end of the wing plate 720. Wherein a sealing structure is arranged between the via hole and the telescopic end 830 of the telescopic mechanism.

Wherein the valve flap 700 is plunger-shaped; alternatively, the cross section of the valve flap 700 is U-shaped (or called front disk); the valve clack 700 is provided with a sealing working end face at one side of the valve seat 620; the valve seat 620 is provided with a sealing end surface on the valve flap 700 side, which is adapted to the sealing end surface. In the closed state, a metal-to-metal seal is provided between the valve flap 700 and the valve seat 620.

Preferably, referring to fig. 20, the cross-sectional shape of the valve flap 700 is H-shaped, and the valve flap 700 is provided with a soft seal 730 on the side of the valve seat 620; the outer end face of the soft sealing member 730 is fixed with a pressure plate 731, and the outer diameter of the pressure plate 731 is smaller than the inner diameter of the valve seat 620. The soft sealing member 730 is a rubber member, a teflon plastic member, a ceramic fiber member, or the like.

The embodiment further comprises a controller, a first position sensor 605 and a second position sensor 606, wherein the first position sensor 605 and the second position sensor 606 are respectively arranged in the protective casing 900 and at two ends of the stroke of the wing plate 720; the controller is respectively connected with the first position sensor 605, the second position sensor 606 and the driving mechanism 800, and determines the position information of the valve flap 700 according to the feedback information of the first position sensor 605 and the second position sensor 606; the controller controls the reciprocation of the valve flap 700 by the driving mechanism 800.

According to the external valve stem three-way angle seat valve provided by the invention, the telescopic end 830 (such as a valve stem) of the driving mechanism 800 is arranged outside the valve body 600, so that working media such as pulse shock waves, pulse jet flow and the like are prevented from directly acting on the telescopic end 830, the damage probability of the driving mechanism 800 is reduced, and the service life is longer. Meanwhile, the telescopic end 830 is arranged outside the valve body 600, so that the blocking of working media is reduced.

Example 10

This example is substantially the same as example 4, except that:

as shown in fig. 1, the valve 400 is provided on the branch pipe 210 in this embodiment.

As shown in fig. 21-22, valve 400 is a through-plunger valve that can be used to control the opening and closing of a spout, and includes: the valve body 600, plunger 710, and drive mechanism 800 are telescoping mechanisms.

The valve body 600 includes therein a piston chamber 670 and a medium passage 650 crossing each other and communicating with each other; plunger 710 is slidably disposed within piston cavity 670; the telescopic end 830 of the telescopic mechanism extends into the piston cavity 670 from one end of the piston cavity 670 and is connected with the plunger 710, so as to drive the plunger 710 to slide back and forth in the piston cavity 670 and extend into or exit from the medium channel 650, and further to close or open the medium channel 650.

Preferably, the piston cavity 670 and the media channel 650 are disposed perpendicular to each other. Both ends of the media channel 650 include a first port 601 and a second port 602; the first port 601 is communicated with a delivery pipeline of the soot blower working medium, and the second port 602 is connected with a spout.

In this embodiment, the valve body 600 is a four-way circular tube, and the plunger 710 is a circular tube. Both ends of the piston cavity 670 include a third port 603 and a fourth port 604; the third port 603 and the fourth port 604 are respectively blocked by a blind plate 640; a blind plate 640 at the fourth port 604 is secured to the valve body 600 by a flange 630 and bolts. The telescoping end 830 of the telescoping mechanism extends into the piston cavity 670 through one of the blind flanges 640 and connects to the plunger 710. The main body 810 of the telescopic mechanism is fixed to the blind plate 640.

On the basis of the above technical solution, the present embodiment further includes a controller (not shown) and a first position sensor 605 and a second position sensor 606 for detecting stroke position information of the plunger 710; the controller is respectively connected with the first position sensor 605, the second position sensor 606 and the telescopic mechanism, and determines the position information of the plunger 710 according to the feedback information of the first position sensor 605 and the second position sensor 606; the controller controls the travel of the plunger 710 through the telescoping mechanism.

Preferably, the telescoping end 830 is provided with a magnetic ring on an inboard end (e.g., piston of a cylinder) disposed within the telescoping mechanism body 810, and the first and

second position sensors

605, 606 are magnetic induction sensors disposed on the body 810.

The telescopic mechanism is an electric, pneumatic or hydraulic telescopic mechanism, such as an electric pushing cylinder, an air cylinder, a hydraulic cylinder and the like.

The invention provides a straight-through plunger valve which is simple, reliable and low in manufacturing cost; and can be used not only for pulse shock wave soot blower, but also as fluid or material on-off valve with relaxed sealing requirement.

Example 11

The through plunger valve for controlling the on-off of the nozzle provided by the embodiment is basically the same as that in the embodiment 10, except that:

as shown in FIG. 23, the piston cavity 670 includes a tapered section 611, the tapered section 611 axially containing (covering) the intersection of the piston cavity 670 and the media channel 650; the front end of the plunger 710 is of a frusto-conical shape that sealingly fits into the conical section 611.

Further, the end of the piston cavity 670 remote from the junction port includes a straight barrel section 612; the bore diameter of straight barrel section 612 corresponds to the maximum outer diameter of plunger 710.

The sealing effect of this example is better than that of example 10.

Example 12

as shown in fig. 24-25, the valve body 600 is a T-shaped tee fitting, and one end of the piston cavity 670 is communicated with the medium passage 650, and the other end is blocked by the blind plate 640; the telescopic end 830 of the telescopic mechanism extends into the piston cavity 670 through a through hole on the blind plate 640 to be connected with the plunger 710; the lower end of the plunger 710 is hemispherical, and the plunger 710 extends from the piston cavity 670 to abut against the side wall of the medium channel 650 to cut off the medium channel 650.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. High sharing formula composite gas wave soot blowing system, its characterized in that includes: the gas generator comprises a plurality of gas wave generators, a plurality of emission assemblies and a controller;

the transmitting assembly is connected with the main pipeline;

the controller is respectively connected with a plurality of gas wave generators; the controller controls several gas wave generators to work continuously according to set time interval, several gas waves emitted by several gas wave generators are compounded into new compound wave with certain frequency, and the compound wave is transmitted into boiler flue through emission assembly to blow soot.

2. The highly shared composite gas wave soot blowing system of claim 1, wherein the time interval is 1/2000 seconds or more and 1/30 seconds or less.

3. The highly shared composite gas wave soot blowing system of claim 1, wherein the emission assembly comprises a valve and an emitter;

4. The highly shared composite gas wave soot blowing system of claim 1, wherein said gas wave generator is a pulsed laser wave generator; the pulse impulse generator is one or two of a burning explosion pulse impulse generator and a gas cannon type pulse impulse generator.

5. The highly shared composite gas wave soot blowing system of claim 1, wherein the gas wave generator is a sound wave generator;

the gas wave generator comprises one or more acoustic wave generators.

6. The highly shared composite gas wave soot blowing system of claim 5, wherein said gas wave generator comprises a plurality of sound wave generators, the frequency of said sound wave generators of the plurality being the same.

7. The highly shared composite gas wave soot blowing system of claim 1, further comprising a sealing fan, an outlet of the sealing fan is communicated with the main pipeline for filling sealing protection wind into the main pipeline.

8. The highly-shared composite gas wave soot blowing system according to claim 1, wherein the main pipeline is further communicated with a positive pressure wind source for charging sealing protection wind into the main pipeline.

9. The highly shared composite gas wave soot blowing system as claimed in claim 3, wherein said controller is connected to said valves for selectively opening and closing one or several of said valves during soot blowing.

10. The highly shared composite gas wave soot blowing system of claim 3, wherein said valve is a straight tube plunger slide valve comprising: the valve comprises a valve body, a plunger and a driving mechanism;

11. The highly shared composite gas wave soot blowing system of claim 10, wherein limiting structures are provided in the valve body and on both sides of the plunger for limiting the moving stroke of the plunger.

12. The highly shared composite gas wave soot blowing system of claim 10, further comprising a position sensor; the two position sensors are respectively arranged in the valve body and on two sides of the plunger and are used for monitoring the moving position of the plunger; and the controller is respectively connected with the position sensor and the driving mechanism and acquires the position of the plunger according to feedback information of the position sensor.

13. A high sharing type composite gas wave soot blowing method is characterized by comprising a plurality of gas wave generators, a plurality of emission assemblies and a controller; a plurality of gas wave generators are arranged in parallel through a main pipeline; the transmitting assembly is connected with the main pipeline; the controller is respectively connected with a plurality of gas wave generators; the controller controls several gas wave generators to work continuously according to set time interval, the gas waves emitted by several gas wave generators are compounded into new compound wave with a certain frequency, and the compound wave is transmitted into the boiler flue through the transmitting assembly to blow soot.