Spraying device for soot blowing of boiler of power plant

Abstract

The utility model discloses a spraying device for soot blowing of a power plant boiler, and relates to the technical field of power plant devices. The spraying device comprises a dust settling chamber, a soot blower, a soot deposition box, a water pump, a lifting air cylinder, a vibrator and a soot falling assembly; the dust settling chamber is a main body part of the whole structure; the soot blower is fixed to the right side of the dust settling chamber through supporting legs and connected with the boiler through a pipeline. The soot deposition box is fixed at the bottom of the soot blower and is communicated with the dust settling chamber; the water pump is fixed below the dust accumulation box; the lifting air cylinder is fixed to the top of the soot blower. The vibrator is arranged in the middle of the soot blower, is connected with the soot falling assembly and is used for shaking off accumulated soot attached to the soot falling assembly through vibration; the ash falling assembly is arranged in the middle of the ash blower and located below the lifting air cylinder, comprises a plurality of turning plates and ash shaking cloth which are arranged in the circumferential direction and is used for shaking off accumulated ash on the turning plates and the ash shaking cloth by turning over the turning plates and the ash shaking cloth. The technical effects that accumulated dust is thoroughly cleaned, the dust falling effect is improved, and the maintenance cost is reduced can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power plant device technical field especially relates to a power plant boiler soot blowing is with spray device. BACKGROUND

[0002] The boiler is the energy conversion equipment commonly used in industrial production, which produces high-temperature and high-pressure steam by burning fuel to drive steam turbine and other equipment. However, during the operation of the boiler, due to the combustion of fuel and the flow of flue gas, a large amount of ash will be deposited on the heating surface of the boiler. These ash not only reduces the heat transfer efficiency of the boiler, leading to an increase in exhaust gas temperature and heat loss, but also affects the safe operation of the boiler, and even causes safety accidents.

[0003] The utility model discloses a kind of power plant boiler soot blowing is with spray device, including dust fall chamber and the soot blower body being set in dust fall chamber one side, dust fall chamber bottom is equipped with ash box, ash box is communicated with dust fall chamber, dust fall chamber bottom is equipped with circular arc bottom plate above ash box, the outer wall of circular arc bottom plate top is equipped with connecting block, vibration machine is fixedly connected on the inner wall top of circular arc bottom plate, lifting electric cylinder is equipped on the top of dust fall chamber, lifting electric cylinder piston end penetrates dust fall chamber rear and is fixedly connected with connecting block;The spray device of the utility model can collect ash at the bottom of dust fall chamber while dust falling, dust falling and processing ash work independently and do not affect each other, ash cleaning is timely and completely, and it is not easy to form agglomeration.

[0004] The above scheme improves the work efficiency to some extent when cleaning the ash, but in actual use, since the structure of the circular arc bottom plate is relatively simple, the stress condition and motion trajectory of the ash during sliding are not fully considered, therefore the ash cannot be effectively guided to the center or specified direction, which leads to a small amount of ash sticking and remaining on the bottom plate, so that the ash cleaning is not complete, and the dust falling effect is reduced. In addition, the spray device may also be blocked, affecting its normal operation, and thus increasing the equipment maintenance cost. SUMMARY

[0005] The present application provides a kind of power plant boiler soot blowing is with spray device, solve the technical problem that ash cleaning is not complete in prior art, dust falling effect is poor and maintenance cost increases, realize the technical effect that ash cleaning is complete, dust falling effect improves and maintenance cost reduces.

[0006] The present application provides a kind of power plant boiler soot blowing is with spray device, including dust fall chamber, soot blower, ash box, water pump, lifting air cylinder, vibration machine and ash falling component;

[0007] The dust falling chamber is a main body part of an integral structure, used for containing dust generated in the soot blowing process; the soot blower is fixed on the right side of the dust falling chamber through supporting legs and connected with the boiler through a pipeline; the soot accumulation box is fixed at the bottom of the soot blower and communicated with the dust falling chamber; the water pump is fixed below the soot accumulation box; the lifting cylinder is fixed at the top of the soot blower, with its piston end penetrating through the soot blower and connected with the soot falling assembly; the vibrator is arranged in the middle of the soot blower and connected with the soot falling assembly, used for shaking off the accumulated soot on the soot falling assembly through vibration.

[0008] The soot falling assembly is arranged in the middle of the soot blower and below the lifting cylinder, comprising a plurality of turning plates and soot shaking cloths arranged in a circle, used for shaking off the accumulated soot above the turning plates and soot shaking cloths through turning the turning plates and soot shaking cloths.

[0009] Further, a plurality of spraying openings are uniformly fixed on the inner wall of the top of the soot blower, used for spraying treatment of the dust; the water pump is connected with the spraying openings through a water outlet pipe, used for conveying water to the spraying openings for spraying treatment.

[0010] Further, a plurality of screening nets are arranged in the middle of the soot accumulation box, used for preventing the accumulated soot from blocking the water outlet pipe.

[0011] Further, the soot falling assembly comprises a connecting column, a moving column, a turning plate, a connecting rod and a soot shaking cloth.

[0012] The connecting column is a hollow tubular structure, fixed at the top end of the soot blower, the piston end of the lifting cylinder penetrates through the connecting column, and the vibrator is fixed at the lower end of the connecting column; the moving column is fixed at the bottom of the piston end of the lifting cylinder and penetrates through the connecting column; a plurality of turning plates are arranged, uniformly arranged along the radial direction of the moving column, all rotatably connected to the upper end of the moving column through a hinged manner, used for receiving the furnace soot falling from the top of the dust falling chamber; a plurality of connecting rods are arranged, corresponding to the turning plates one by one, rotatably connected to the lower end of the moving column through a hinged manner; a plurality of soot shaking cloths are arranged, one between every two adjacent turning plates, used for further dispersing and shaking off the accumulated soot adhered to the turning plates.

[0013] Further, the soot shaking cloth and the turning plate are both arc surface sector structures, used for guiding the accumulated soot to slide into the soot accumulation box under the extension and retraction of the lifting cylinder.

[0014] Further, a plurality of air bags are fixed at the bottom of the turning plates, the air bags are flexible annular structures, connected with an external air pump through a pipeline, used for controlling the opening and closing of the soot falling port.

[0015] Further, a supporting rod is fixed between the bottom of each turning plate and the corresponding air bag, the supporting rod is a columnar air bag structure and its inside is filled with paraffin, the supporting rod is used for providing position support for the turning plate after the paraffin solidifies.

[0016] The one or more technical solutions provided in the application have at least the following technical effects or advantages:

[0017] By controlling the stretching and retracting of the lifting cylinder piston end to drive the turning plate and the dust shaking cloth to turn up and down, the accumulated dust can not only be subjected to more uniform force in the sliding process, but also be further scattered and shaken off under the turning action of the turning plate, thereby reducing the residue and adhesion of the accumulated dust, and the accumulated dust can fall more smoothly and continuously, reducing the direct impact and retention of the accumulated dust on the bottom plate, effectively solving the technical problems of incomplete accumulated dust cleaning, poor dust reduction effect and increased maintenance cost in the prior art, and achieving the technical effects of complete accumulated dust cleaning, improved dust reduction effect and reduced maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an overall structural schematic view of the spray device for boiler ash blowing in a power plant.

[0019] Figure 2 It is a partial three-dimensional structural sectional view of the ash falling assembly of the spray device for boiler ash blowing in a power plant.

[0020] Figure 3 It is a side three-dimensional structural schematic view of the ash falling assembly of the spray device for boiler ash blowing in a power plant.

[0021] Figure 4 It is a three-dimensional sectional view of the ash falling assembly of the spray device for boiler ash blowing in a power plant when the ash falling assembly is in convergence.

[0022] Figure 5 It is an overall structural schematic view of the spray device for boiler ash blowing in a power plant. Figure 4 It is a partial enlarged schematic view of position A.

[0023] In the figure: 100, dust falling chamber; 101, supporting leg; 110, ash blower; 120, accumulated dust box; 121, screening net; 130, water pump; 131, water outlet pipe; 132, spraying port; 140, lifting cylinder; 150, vibrating machine; 200, ash falling assembly; 210, connecting column; 211, moving column; 220, turning plate; 221, connecting rod; 222, supporting rod; 230, dust shaking cloth; 240, air bag. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present application, the application will be described more fully below with reference to the related drawings; the preferred embodiments of the present application are shown in the drawings, but the present application can be realized in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0025] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms used herein are for illustrative purposes only and are not intended to be limiting.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of the terms "and / or" includes any and all combinations of one or more of the associated listed items.

[0027] Please refer to Figure 1 , the overall structure schematic diagram of a power plant boiler soot blowing spray device of the application; in the process of moving up and down by the lifting cylinder 140 driving the moving column 211, the moving column 211 moves up and down to drive the flap 220 and the dusting cloth 230 to synchronize convergence and expansion of the turning, so that the accumulated dust can not only receive more uniform force in the sliding process, but also can be further scattered and shaken off under the turning effect of the flap 220, reducing the residue and adhesion of the accumulated dust, realizing the technical effects of complete accumulated dust cleaning, improved dust reduction effect and reduced maintenance cost.

[0028] Example one: as Figures 1 to 3 shown, a power plant boiler soot blowing spray device of the application, including dust fall chamber 100, soot blower 110, accumulated dust box 120, water pump 130, lifting cylinder 140, vibration machine 150 and dust falling assembly 200;

[0029] The dust fall chamber 100 is the main part of the overall structure, used for containing the dust generated in the process of soot blowing;

[0030] The soot blower 110 is fixed on the right side of the dust fall chamber 100 through the support foot 101 and connected with the boiler through the pipeline;

[0031] The accumulated dust box 120 is fixed at the bottom of the soot blower 110 and communicated with the dust fall chamber 100;

[0032] The water pump 130 is fixed below the accumulated dust box 120;

[0033] The lifting cylinder 140 is fixed at the top of the soot blower 110, and its piston end penetrates the soot blower 110 and is connected with the dust falling assembly 200;

[0034] The vibration machine 150 is arranged in the middle of the soot blower 110 and connected with the dust falling assembly 200, used for shaking off the accumulated dust on the dust falling assembly 200 by vibration;

[0035] The falling ash assembly 200 is arranged in the middle of the soot blower 110 below the lifting cylinder 140, and includes a plurality of flaps 220 and dusting cloths 230 arranged circumferentially, for shaking off the dust above by turning the flaps 220 and dusting cloths 230.

[0036] A plurality of spray ports 132 are uniformly fixed on the inner wall of the top of the soot blower 110, for spraying treatment of dust; the water pump 130 is connected with the spray ports 132 through the water outlet pipe 131, for conveying water to the spray ports 132 for spraying treatment.

[0037] A plurality of screening nets 121 are arranged in the middle of the dust accumulation box 120, for preventing dust accumulation from blocking the water outlet pipe 131.

[0038] The falling ash assembly 200 includes a connecting column 210, a moving column 211, a flap 220, a connecting rod 221, and a dusting cloth 230.

[0039] The connecting column 210 is a hollow tubular structure fixed at the top end of the soot blower 110, the piston end of the lifting cylinder 140 penetrates the connecting column 210, and the vibration machine 150 is fixed at the lower end of the connecting column 210.

[0040] The moving column 211 is fixed at the bottom of the piston end of the lifting cylinder 140 and penetrates the connecting column 210.

[0041] The flaps 220 are arranged radially uniformly along the moving column 211, and are rotatably connected to the upper end of the moving column 211 by a hinged manner, for receiving the furnace dust falling from the top of the dust falling chamber 100.

[0042] The connecting rods 221 are arranged in a one-to-one correspondence with the flaps 220, and are rotatably connected to the lower end of the moving column 211 by a hinged manner.

[0043] The dusting cloths 230 are arranged in a plurality, and each adjacent two flaps 220 are fixed with a piece of dusting cloth 230, for further dispersing and shaking off the dust accumulated on the flaps 220.

[0044] The dusting cloths 230 and the flaps 220 are both arc surface sector structures, for guiding the dust to slide into the dust accumulation box 120 under the extension and retraction of the lifting cylinder 140. The initial angle of the flaps 220 can be adjusted by controlling the extension amount of the piston rod of the lifting cylinder 140, so as to optimize the sliding path of the dust, and then control the bearing area of the falling ash, expand the application range of the device, and improve the flexibility of the device.

[0045] The dusting cloth 230 is made of polyester fiber cloth, which can effectively block stains and has good elasticity and durability without deformation; the connection between the turning plate 220 and the dusting cloth 230 adopts a clamping connection mode of a cloth strip, which is convenient for disassembly and replacement. Through the arc surface fan-shaped structure design of the turning plate 220, the accumulated dust can fall along a smoother and more continuous path during the sliding process, reducing the direct impact and retention of the accumulated dust on the bottom plate. At the same time, the arc surface design can also guide the accumulated dust to gather towards the center or a specified direction, facilitating subsequent collection and cleaning. In addition, the shaking effect of the dusting cloth 230 can also shake and shake off the accumulated dust attached to the turning plate 220 and the dusting cloth 230, reducing the residue and adhesion of the accumulated dust.

[0046] In actual operation, the steps of the embodiment are as follows:

[0047] Step one: when the device is working, start the soot blower 110 to blow the accumulated dust in the boiler into the dust falling chamber 100;

[0048] Step two: start the water pump 130 to work, and transport the water in the accumulated dust box 120 to the spray opening 132 through the water outlet pipe 131, and the water mist sprayed through the spray opening 132 adsorbs the accumulated dust in the dust falling chamber 100 and falls under its own gravity;

[0049] Step three: the accumulated dust falls on the turning plate 220 and the dusting cloth 230, and as the accumulation of the accumulated dust, when the accumulated dust needs to be treated, the vibration machine 150 is started and the lifting cylinder 140 is started to drive the moving column 211 to rise, which drives the turning plate 220 and the dusting cloth 230 to turn outward and expand under the action of the connecting rod 221, and then the lifting cylinder 140 is started to drive the moving column 211 to descend, which drives the turning plate 220 and the dusting cloth 230 to turn inward and converge under the action of the connecting rod 221;

[0050] Step four: in the process of repeatedly turning the turning plate 220 and the dusting cloth 230, and under the vibration of the vibration machine 150, the turning plate 220 and the dusting cloth 230 are turned and shaken, and the accumulated dust attached thereto is shaken off. At the same time, the arc surface fan-shaped structure of the turning plate 220 guides the accumulated dust to gather towards the center and slide along a smoother and more continuous path to the accumulated dust box 120.

[0051] The technical solutions in the above embodiments have at least the following technical effects or advantages:

[0052] Through the driving of the lifting cylinder 140, the whole dust falling assembly 200 can realize the automatic cleaning process, and the tediousness and labor intensity of manual cleaning are reduced. At the same time, the synergistic effect of the turning plate 220 and the dusting cloth 230 and the vibration effect of the vibrator 150 make the accumulated dust more completely slide into the dust accumulation box 120, avoiding the residue and adhesion of the accumulated dust on the turning plate 220; effectively solve the technical problems of incomplete cleaning of accumulated dust, poor dust reduction effect and increased maintenance cost in the prior art, realize the technical effects of complete cleaning of accumulated dust, improved dust reduction effect and reduced maintenance cost.

[0053] Embodiment two: In order to prevent dust from falling into the dust accumulation box 120 before being shaken off, causing the water pump 130 to be blocked, and to further improve the stability of the turning plate 220 and the efficiency of the accumulated dust falling, and to realize the controllable sealing of the dust falling port, the present application proposes the following technical solution to solve the above technical problems, specifically:

[0054] As shown in Figure 4 and Figure 5 , a plurality of turning plates 220 are fixed at the bottom of the dust falling assembly 200, and a plurality of gas bags 240 are fixed at the bottom of the turning plates 220, the gas bags 240 are flexible annular structures, and are connected in communication with an external air pump through a pipeline, for controlling the opening and closing of the dust falling port.

[0055] A support rod 222 is fixed between the bottom of each turning plate 220 and the inside of the corresponding gas bag 240, the support rod 222 is a columnar gas bag structure and is filled with paraffin inside, and the support rod 222 provides position support for the turning plate 220 after the paraffin solidifies.

[0056] In actual use, when dust falling is needed, the gas bag 240 is pumped to make the gas bag 240 contract, thereby opening the dust falling port, and the accumulated dust slides into the dust accumulation box 120 under the action of gravity; when dust falling is not needed, the gas bag 240 is inflated to make the gas bag 240 expand, thereby closing the dust falling port to prevent dust leakage.

[0057] By controlling the inflation and pumping of the gas bag 240, the automatic opening and closing of the dust falling port can be flexibly controlled, and through the flexible and extendable characteristics of the gas bag 240 itself, it can be tightly attached to the turning plate 220 and the inner wall of the dust falling chamber 100, thereby effectively preventing dust and impurities from leaking, and the inflation state of the gas bag 240 can ensure the complete sealing of the dust falling port during the process of not needing dust falling, avoiding the pollution of dust to the surrounding environment.

[0058] By arranging the supporting rod 222 inside the air bag 240 and fixedly connecting with the corresponding flap 220, additional supporting force can be provided for the flap 220, the supporting rod 222 adopts a solid structure formed after paraffin solidification, has high strength and stability, and the design makes the flap 220 not easy to deform or displace when subjected to external force, thereby improving the stability and reliability of the whole ash falling assembly 200.

[0059] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power plant boiler sootblowing spray device, characterized in that The dust falling chamber (100), the soot blower (110), the dust accumulation box (120), the water pump (130), the lifting cylinder (140), the vibrating machine (150) and the soot falling assembly (200) are included. The dust falling chamber (100) is a main body part of integral structure, used for containing dust generated in the soot blowing process; the soot blower (110) is fixed on the right side of the dust falling chamber (100) through the support leg (101) and connected with the boiler through the pipeline; the dust accumulation box (120) is fixed on the bottom of the soot blower (110) and communicated with the dust falling chamber (100); the water pump (130) is fixed below the dust accumulation box (120); the lifting cylinder (140) is fixed on the top of the soot blower (110), the piston end of which penetrates the soot blower (110) and connected with the soot falling assembly (200); the vibrating machine (150) is arranged in the middle of the soot blower (110) and connected with the soot falling assembly (200), used for shaking off the dust on the soot falling assembly (200) through vibration. The soot falling assembly (200) is arranged in the middle of the soot blower (110) and below the lifting cylinder (140), including a plurality of turning plates (220) and dust shaking cloths (230) arranged in the circumference, used for shaking off the dust on the turning plates (220) and the dust shaking cloths (230) through turning.

2. A spray device for use in the soot blowing of a boiler of a power plant according to claim 1, characterized in that A plurality of spraying ports (132) are uniformly fixed on the inner wall of the top of the soot blower (110), used for spraying treatment of the dust; the water pump (130) is connected with the spraying ports (132) through the water outlet pipe (131), used for conveying water to the spraying ports (132) for spraying treatment.

3. A spray device for use in the soot blowing of a boiler of a power plant according to claim 2, characterized in that A plurality of screening meshes (121) are arranged in the middle of the dust accumulation box (120), used for preventing the dust accumulation from blocking the water outlet pipe (131).

4. A spray device for use in the soot blowing of a boiler of a power plant according to claim 1, characterized in that The soot falling assembly (200) includes a connecting column (210), a moving column (211), a turning plate (220), a connecting rod (221) and a dust shaking cloth (230). The connecting column (210) is a hollow tubular structure, fixed on the top end of the soot blower (110), the piston end of the lifting cylinder (140) penetrates the connecting column (210), and the vibrating machine (150) is fixed on the lower end of the connecting column (210); the moving column (211) is fixed on the bottom of the piston end of the lifting cylinder (140) and penetrates the connecting column (210); a plurality of turning plates (220) are arranged, uniformly arranged along the radial direction of the moving column (211), all rotatingly connected on the upper end of the moving column (211) through the hinged mode, used for receiving the furnace dust falling from the top of the dust falling chamber (100); a plurality of connecting rods (221) are arranged, corresponding to the turning plates (220) one by one, rotatingly connected on the lower end of the moving column (211) through the hinged mode; a plurality of dust shaking cloths (230) are arranged, one piece of dust shaking cloth (230) fixed between every adjacent two turning plates (220), used for further dispersing and shaking off the dust attached on the turning plates (220).

5. A spray device for use in the soot blowing of a boiler of a power plant according to claim 4, characterized in that The dust shaking cloth (230) and the turning plate (220) are both arc sector structures, used for guiding the dust to slide into the dust accumulation box (120) under the extension and retraction of the lifting cylinder (140).

6. A spray device for use in the soot blowing of a boiler of a power plant according to claim 5, characterized in that A plurality of said turning plates (220) are fixed with air bags (240) at the bottom, the air bags (240) are flexible annular structures, and are connected with external air pumps through pipes to control the opening and closing of the ash falling port.

7. A spray device for use in the soot blowing of a boiler of a power plant according to claim 6, characterized in that A support rod (222) is fixed between the bottom of each said turning plate (220) and the inside of the corresponding air bag (240), the support rod (222) is a columnar air bag structure and is filled with paraffin inside, and the support rod (222) is used to provide position support for the turning plate (220) after the paraffin solidifies.

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