CN212701244U

CN212701244U - Power plant boiler flue gas whitening device

Info

Publication number: CN212701244U
Application number: CN202020710316.0U
Authority: CN
Inventors: 刘立鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-03
Filing date: 2020-05-03
Publication date: 2021-03-16
Anticipated expiration: 2030-05-03

Abstract

The utility model provides a white device is taken off to power boiler flue gas belongs to the flue gas and takes off white technical field, including installation component and dust clearance mechanism. The mounting assembly comprises a mounting plate, a cooling barrel and a fixing plate, wherein one end of the cooling barrel is fixed on the mounting plate, and the other end of the cooling barrel is fixed on the fixing plate. Dust clearance mechanism includes motor, lead screw, supporting seat, drive nut, crane, spacing pipe and clearance subassembly, the motor is fixed in the mounting panel, the lead screw is fixed in the motor, the drive nut transmission connect in the lead screw, drive nut is fixed in the crane, clearance subassembly fixed mounting in the outside of crane. Realize through above-mentioned device that the dust clearance need not artifical clearance, improve work efficiency greatly, the cooling bucket is kept away from to the clearance process workman so the dust workman that the clearance process produced can not inhale, and the effectual workman of having guaranteed is healthy.

Description

Power plant boiler flue gas whitening device

Technical Field

The utility model relates to a white technical field of flue gas takes off, particularly, relates to a white device is taken off to power plant's boiler flue gas.

Background

The flue gas of coal-fired power plant flue gas, the flue gas of equipment such as sintering machine of smelting trade etc. generally adopt wet flue gas desulfurization technique to get rid of the sulfur dioxide in the flue gas, and the vapor is in the saturated state in the desulfurizing tower export flue gas, and after wet saturated flue gas discharges through the chimney, because ambient temperature is low, the vapor takes place to condense in the flue gas, forms vaporific vapor in the chimney exit, generally is white, is called white plume.

In the process of whitening flue gas of a boiler in a power plant, in order to avoid waste of heat in the flue gas, heat energy recovery is needed, in the process of heat energy recovery, because the temperature of the flue gas drops, water vapor in the flue gas condenses into water drops, the water drops and impurities such as solid particles in the flue gas are fused into dust, the dust can be adhered to the inner wall of a cooling barrel, if the dust on the barrel wall is not cleaned in time, the dust is full of the inner wall, heat is influenced to be transmitted outwards, the barrel wall is corroded and damaged, and therefore the dust on the barrel wall needs to be cleaned.

SUMMERY OF THE UTILITY MODEL

In order to compensate above not enough, the utility model provides a power plant's boiler flue gas takes off white device aims at improving the inner wall of cooling bucket in taking off white device to the flue gas at present and is artifical clearance usually, and work efficiency is low, and the workman can inhale the dust among the clearance process, leads to the fact the problem of injury healthy to the workman.

The utility model discloses a realize like this:

the utility model provides a power boiler flue gas takes off white device, including installation component and dust clearance mechanism.

The mounting assembly comprises a mounting plate, a cooling barrel and a fixing plate, the cooling barrel is a pipe body with two open ends, one end of the cooling barrel is fixedly mounted on the mounting plate, the other end of the cooling barrel is fixedly mounted on the fixing plate, a smoke inlet pipe is communicated with the fixing plate, and a smoke outlet pipe is communicated with one end of the cooling barrel, which is far away from the fixing plate;

dust clearance mechanism includes motor, lead screw, supporting seat, drive nut, crane, spacing pipe and clearance subassembly, motor fixed mounting in the mounting panel, lead screw one end fixed mounting in the motor, the other end rotate install in the supporting seat, supporting seat fixed mounting in the cooling bucket is kept away from inside the one end of mounting panel, the drive nut transmission connect in the lead screw, drive nut fixed mounting in the crane, clearance subassembly fixed mounting in the outside of crane, spacing pipe cup joints in the outside of lead screw, the one end fixed mounting of spacing pipe in the fixed plate, other end fixed mounting in the supporting seat, logical groove has been seted up on the spacing pipe, the crane passes through logical groove runs through spacing pipe.

The utility model discloses an in one embodiment, the mounting panel is kept away from the one side four corners position of cooling bucket all is fixed with the supporting leg, every the supporting leg is kept away from the one end of mounting panel all is fixed with the base.

In an embodiment of the present invention, the smoke inlet pipe is provided with a check valve.

The utility model discloses an in the embodiment, the clearance subassembly includes annular installation shell, arc installation piece, arc cleaning brush and arc limiting plate, arc installation piece one end is run through the lateral wall of annular installation shell, arc cleaning brush fixed mounting with the one end of arc installation piece, the arc limiting plate is fixed in arc installation piece is kept away from the one end of arc cleaning brush, the arc cleaning brush is located the outside of annular installation shell and with the bucket wall of cooling bucket is contradicted, the arc limiting plate is located the inside of annular installation shell.

The utility model discloses an in an embodiment, the arc limiting plate is kept away from the one end of arc installation piece is contradicted there is the spring, the spring is kept away from the inside spring spacer pin that has cup jointed of one end of arc limiting plate, spring spacer pin fixed mounting in the inner wall of annular installation shell.

The utility model discloses an in an embodiment, arc installation piece, arc cleaning brush and arc limiting plate all are provided with three groups, three groups the setting of angles such as arc installation piece, arc cleaning brush and arc limiting plate is in on the annular installation shell.

The utility model discloses an in an embodiment, still include the heat recovery subassembly, the heat recovery subassembly includes heat absorption pipe, the pump body and heat exchanger, the heat absorption pipe spiral winding is in inside the barrel wall of cooling bucket, the export of heat absorption pipe with the entry intercommunication of heat exchanger, heat exchanger fixed mounting in the mounting panel, the export of heat exchanger with the entry intercommunication of the pump body, pump body fixed mounting in the heat exchanger, the export of the pump body with the entry intercommunication of heat absorption pipe.

The utility model discloses an in one embodiment, the cooling bucket is kept away from the one end of fixed plate is provided with the dust discharge subassembly, the dust discharge subassembly includes circular door and hasp, circular door with the mounting plate is articulated, circular door pass through the hasp with mounting panel fixed connection, hasp fixed mounting in the mounting panel.

In an embodiment of the present invention, a handle is fixed to one side of the circular door close to the hasp.

The utility model discloses an in one embodiment, circular door is kept away from the one side of handle is fixed with the sealing washer, the sealing washer with the cooling bucket is kept away from the one end terminal surface of fixed plate is contradicted.

The utility model has the advantages that: the utility model obtains the power plant boiler flue gas whitening device through the design, when dust needs to be cleaned, the motor is started, the motor drives the screw rod to rotate, the transmission nut is fixed on the lifting frame, the lifting frame penetrates through the limiting pipe through the through groove, the transmission nut is in threaded transmission connection with the screw rod, the rotation of the screw rod drives the transmission nut to drive the lifting frame to move up and down along the through groove, so that the lifting frame drives the cleaning assembly to move up and down in the cooling barrel, the cleaning assembly is tightly abutted against the inner wall of the cooling barrel, thereby realizing the automatic cleaning of the dust on the inner wall of the cooling barrel by the up-and-down movement of the cleaning component, greatly improving the working efficiency without disassembling the cooling barrel and manually cleaning the dust in the cleaning process, leading workers to be far away from the cooling barrel in the cleaning process, therefore, dust generated in the cleaning process can not be sucked by workers, and the health of the workers is effectively ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a perspective view of a device for removing white matter from flue gas of a power plant boiler according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a dust cleaning mechanism of a power plant boiler flue gas whitening device provided by the embodiment of the present invention;

FIG. 3 is a schematic structural view of a cleaning assembly of a power plant boiler flue gas whitening device provided by the embodiment of the present invention;

fig. 4 is an enlarged view of a portion a of fig. 3 according to the present invention;

FIG. 5 is a schematic structural view of a heat recovery assembly of a power plant boiler flue gas whitening device according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a closed state of a circular door of a flue gas whitening device of a power plant boiler according to an embodiment of the present invention;

fig. 7 is the embodiment of the utility model provides a power boiler flue gas takes off white device circular door open mode sketch map that puts.

In the figure: 100-mounting the assembly; 110-a mounting plate; 111-support legs; 112-a base; 120-cooling barrel; 130-a fixed plate; 140-smoke inlet pipe; 141-a one-way valve; 150-smoke outlet pipe; 200-a dust cleaning mechanism; 210-a motor; 220-a screw mandrel; 230-a support seat; 240-drive nut; 250-a lifting frame; 260-a limiting tube; 261-a through groove; 280-a cleaning assembly; 281-annular mounting shell; 282-arcuate mounting blocks; 283-an arc cleaning brush; 284-arc limiting plate; 285-spring; 286-spring limit pin; 300-a heat recovery assembly; 310-a heat absorption tube; 320-a pump body; 330-a heat exchanger; 400-dust exhaust assembly; 410-a circular door; 411-a handle; 412-a sealing ring; 420-hasp.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1-7, the present invention provides a technical solution: a power plant boiler flue gas whitening device comprises a mounting assembly 100 and a dust cleaning mechanism 200.

Referring to fig. 1, the mounting assembly 100 is used for cooling and heat transfer and mounting a dust cleaning mechanism 200, and the dust cleaning mechanism 200 is used for cleaning dust on the inner wall of the cooling barrel 120.

Referring to fig. 1, the mounting assembly 100 includes a mounting plate 110, a cooling barrel 120 and a fixing plate 130, the cooling barrel 120 is a tube body with two open ends, the mounting plate 110 is fixed at an upper end of the cooling barrel 120 by bolts, a lower end of the cooling barrel 120 is fixed at the fixing plate 130 by bolts, the fixing plate 130 is communicated with a smoke inlet tube 140 for smoke to enter the cooling barrel 120, the smoke inlet tube 140 is provided with a check valve 141 for controlling the opening and closing of the smoke inlet tube 140, and is convenient to use, one end of the cooling barrel 120 away from the fixing plate 130 is communicated with a smoke outlet tube 150 for discharging the cooled smoke out of the cooling barrel 120.

Referring to fig. 1, in an embodiment of the present invention, the supporting legs 111 are fixed to four corners of one side of the mounting plate 110 away from the cooling barrel 120 by bolts, so as to support the whole device, and the base 112 is fixed to one end of each supporting leg 111 away from the mounting plate 110 by welding, so as to increase the contact area between the supporting leg 111 and the ground and improve the stability of the device.

Referring to fig. 2, the dust cleaning mechanism 200 includes a motor 210, a screw rod 220, a support base 230, a transmission nut 240, a lifting frame 250, a limit pipe 260 and a cleaning assembly 280, the motor 210 is fixedly mounted on the mounting plate 110 through a bolt, one end of the screw rod 220 is fixedly mounted on the end portion of the output shaft of the motor 210, the other end is rotatably mounted on the support base 230 through a bearing, the support base 230 is fixedly mounted inside one end of the cooling barrel 120 away from the mounting plate 110 through welding, the transmission nut 240 is connected to the screw rod 220 in a threaded transmission manner, the transmission nut 240 is embedded in the lifting frame 250, the cleaning assembly 280 is fixedly mounted on the outer side of the lifting frame 250, the limit pipe 260 is sleeved on the outer side of the screw rod 220, one end of the limit pipe 260 is fixedly mounted on the fixing plate 130 through welding, the other end is fixedly mounted, the crane 250 is limited, so that the crane 250 moves up and down along the screw rod 220.

Referring to fig. 3, in an embodiment of the present invention, the cleaning assembly 280 includes an annular mounting shell 281, an arc mounting block 282, an arc cleaning brush 283 and an arc limiting plate 284, one end of the arc mounting block 282 runs through a side wall of the annular mounting shell 281, the arc cleaning brush 283 is fixedly mounted at one end of the arc mounting block 282, the arc limiting plate 284 is fixed at one end of the arc mounting block 282 away from the arc cleaning brush 283 by welding, the arc cleaning brush 283 is located outside the annular mounting shell 281 and is abutted against a barrel wall of the cooling barrel 120, and the arc limiting plate 284 is located inside the annular mounting shell 281.

Referring to fig. 4, in an embodiment of the present invention, the spring 285 is contradicted to the one end that arc-shaped limiting plate 284 kept away from arc installation piece 282, and spring 285 keeps away from the inside spring spacing pin 286 that has cup jointed of one end of arc-shaped limiting plate 284, and spring spacing pin 286 passes through bolt fixed mounting in the inner wall of annular installation shell 281, and under the elastic force effect of spring 285, make arc cleaning brush 283 contact with the inner wall of cooling bucket 120 all the time, and the clearance dust is clean, thorough.

Referring to fig. 3, in an embodiment of the present invention, the arc mounting block 282, the arc cleaning brush 283 and the arc limiting plate 284 are all provided with three groups, and the three groups of the arc mounting block 282, the arc cleaning brush 283 and the arc limiting plate 284 are arranged on the annular mounting shell 281, so as to improve the stability of the cleaning assembly 280 when cleaning dust.

Please refer to fig. 5, in an embodiment of the present invention, the heat recovery module 300 further includes a heat absorbing pipe 310, a pump body 320 and a heat exchanger 330, the heat absorbing pipe 310 is spirally wound inside the barrel wall of the cooling barrel 120, an outlet of the heat absorbing pipe 310 is communicated with an inlet of the heat exchanger 330, the heat exchanger 330 is fixedly mounted on the mounting plate 110 through a bolt, an outlet of the heat exchanger 330 is communicated with an inlet of the pump body 320, the pump body 320 is fixedly mounted on the heat exchanger 330 through a bolt, an outlet of the pump body 320 is communicated with an inlet of the heat absorbing pipe 310, so as to recover heat in the flue gas.

Referring to fig. 6 and 7, in an embodiment of the present invention, a dust discharging assembly 400 is disposed at an end of the cooling barrel 120 away from the fixing plate 130, the dust discharging assembly 400 includes a circular door 410 and a buckle 420, the circular door 410 is hinged to the mounting plate 110, the circular door 410 is fixedly connected to the mounting plate 110 through the buckle 420, the buckle 420 is fixedly mounted to the mounting plate 110 through a bolt, a handle 411 is fixed to a side of the circular door 410 close to the buckle 420 through a screw, the circular door 410 is conveniently opened by a hand through the handle 411, so that the bottom end of the cooling barrel 120 is opened, dust convenient to clean is discharged from the cooling barrel 120, a sealing ring 412 is fixed to a surface of the circular door 410 away from the handle 411, the sealing ring 412 is a high temperature resistant silica gel sealing ring, the sealing ring 412 abuts against an end surface of the cooling barrel 120 away from the fixing plate 130, when the circular door 410 is closed with the mounting plate, the smoke is prevented from being discharged, and the sealing effect is achieved.

Specifically, this power boiler flue gas takes off white device's theory of operation: when dust needs to be cleaned, the hasp 420 on the mounting plate 110 is firstly opened, one side of the circular door 410 is separated from the mounting plate 110, the bottom opening of the cooling barrel 120 is opened, and then a recovery barrel is placed below the opening to recover the garbage generated by cleaning;

then the motor 210 is started, and the motor 210 drives the screw rod 220 to rotate, so that the rotation of the screw rod 220 drives the transmission nut 240 to drive the lifting frame 250 to move up and down along the through groove 261 of the limiting pipe 260, and further the lifting frame 250 drives the cleaning assembly 280 to move up and down in the cooling barrel 120;

the arc limiting plate 284 in the annular mounting shell 281 extends outwards under the elastic force of the spring 285, then the arc limiting plate 284 pushes the arc mounting block 282 to extend outwards, then the arc mounting block 282 drives the arc cleaning brush 283 to extend outwards, then the arc cleaning brush 283 is in close contact with the barrel wall of the cooling barrel 120, the arc cleaning brush 283 moves up and down along the barrel wall of the cooling barrel 120 to clean dust on the barrel wall of the cooling barrel 120, the cleaned dust is discharged out of the cooling barrel 120 through an outlet at the lower end of the cooling barrel 120, and then automatic cleaning of the dust on the inner wall of the cooling barrel 120 is realized;

when heat is recovered, heat in the flue gas is transferred to the heat absorption pipe 310 through the wall of the cooling barrel 120, a heat absorption medium (such as water) flows in the heat absorption pipe 310, then the heat is transferred to the heat absorption medium, then the heat absorption medium in the heat absorption pipe 310 enters the heat exchanger 330 under the action of the pump body 320, then the heat exchanger 330 recovers the heat in the heat absorption pipe 310, the temperature of the heat absorption medium is reduced after the heat of the heat absorption medium is recovered, and the heat enters from the inlet of the heat absorption pipe 310 under the action of the pump body 320 and sequentially and circularly works.

It should be noted that the specific model specifications of the motor 210, the pump body 320, and the heat exchanger 330 need to be determined by model selection according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, so detailed description is omitted.

The power supply of the motor 210, the pump body 320 and the heat exchanger 330 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power plant boiler flue gas de-whitening device is characterized by comprising

The mounting assembly (100) comprises a mounting plate (110), a cooling barrel (120) and a fixing plate (130), wherein the cooling barrel (120) is a pipe body with openings at two ends, one end of the cooling barrel (120) is fixedly mounted on the mounting plate (110), the other end of the cooling barrel is fixedly mounted on the fixing plate (130), a smoke inlet pipe (140) is communicated with the fixing plate (130), and a smoke outlet pipe (150) is communicated with one end, far away from the fixing plate (130), of the cooling barrel (120);

the dust cleaning mechanism (200), the dust cleaning mechanism (200) comprises a motor (210), a screw rod (220), a supporting seat (230), a transmission nut (240), a lifting frame (250), a limiting pipe (260) and a cleaning assembly (280), the motor (210) is fixedly arranged on the mounting plate (110), one end of the screw rod (220) is fixedly arranged on the motor (210), the other end of the screw rod is rotatably arranged on the supporting seat (230), the supporting seat (230) is fixedly arranged inside one end, far away from the mounting plate (110), of the cooling barrel (120), the transmission nut (240) is in transmission connection with the screw rod (220), the transmission nut (240) is fixedly arranged on the lifting frame (250), the cleaning assembly (280) is fixedly arranged on the outer side of the lifting frame (250), and the limiting pipe (260) is sleeved on the outer side of the screw rod (220), one end of the limiting pipe (260) is fixedly installed on the fixing plate (130), the other end of the limiting pipe is fixedly installed on the supporting seat (230), a through groove (261) is formed in the limiting pipe (260), and the lifting frame (250) penetrates through the limiting pipe (260) through the through groove (261).

2. A power plant boiler flue gas whitening apparatus according to claim 1, characterized in that supporting legs (111) are fixed at four corners of one side of the mounting plate (110) far away from the cooling barrel (120), and a base (112) is fixed at one end of each supporting leg (111) far away from the mounting plate (110).

3. A power plant boiler flue gas whitening apparatus according to claim 1, characterized in that the smoke inlet pipe (140) is provided with a one-way valve (141).

4. The power plant boiler flue gas whitening device according to claim 1, wherein the cleaning assembly (280) comprises an annular mounting shell (281), an arc mounting block (282), an arc cleaning brush (283) and an arc limiting plate (284), one end of the arc mounting block (282) penetrates through a side wall of the annular mounting shell (281), the arc cleaning brush (283) is fixedly mounted at one end of the arc mounting block (282), the arc limiting plate (284) is fixed at one end of the arc mounting block (282) far away from the arc cleaning brush (283), the arc cleaning brush (283) is located outside the annular mounting shell (281) and is abutted against a barrel wall of the cooling barrel (120), and the arc limiting plate (284) is located inside the annular mounting shell (281).

5. A power plant boiler flue gas whitening device according to claim 4, characterized in that one end of the arc-shaped limiting plate (284) far away from the arc-shaped mounting block (282) is abutted with a spring (285), a spring limiting pin (286) is sleeved inside one end of the spring (285) far away from the arc-shaped limiting plate (284), and the spring limiting pin (286) is fixedly mounted on the inner wall of the annular mounting shell (281).

6. The power plant boiler flue gas whitening device according to claim 4, characterized in that the arc-shaped mounting blocks (282), the arc-shaped cleaning brushes (283) and the arc-shaped limiting plates (284) are provided with three groups, and the three groups of the arc-shaped mounting blocks (282), the arc-shaped cleaning brushes (283) and the arc-shaped limiting plates (284) are arranged on the annular mounting shell (281) at equal angles.

7. The power plant boiler flue gas whitening device according to claim 1, further comprising a heat recovery assembly (300), wherein the heat recovery assembly (300) comprises a heat absorption pipe (310), a pump body (320) and a heat exchanger (330), the heat absorption pipe (310) is spirally wound inside the barrel wall of the cooling barrel (120), an outlet of the heat absorption pipe (310) is communicated with an inlet of the heat exchanger (330), the heat exchanger (330) is fixedly installed on the installation plate (110), an outlet of the heat exchanger (330) is communicated with an inlet of the pump body (320), the pump body (320) is fixedly installed on the heat exchanger (330), and an outlet of the pump body (320) is communicated with an inlet of the heat absorption pipe (310).

8. A power plant boiler flue gas whitening apparatus according to claim 1, characterized in that one end of the cooling barrel (120) far away from the fixing plate (130) is provided with a dust discharging assembly (400), the dust discharging assembly (400) comprises a circular door (410) and a hasp (420), the circular door (410) is hinged with the mounting plate (110), the circular door (410) is fixedly connected with the mounting plate (110) through the hasp (420), and the hasp (420) is fixedly mounted on the mounting plate (110).

9. A power plant boiler flue gas whitening device according to claim 8, characterized in that a handle (411) is fixed on one side of the circular door (410) close to the hasp (420).

10. A power plant boiler flue gas whitening apparatus according to claim 9, characterized in that a sealing ring (412) is fixed on a surface of the circular door (410) far away from the handle (411), and the sealing ring (412) is abutted against an end surface of the cooling barrel (120) far away from the fixing plate (130).