CN218516950U - Rotary air-slag separation structure of air return system of slag cooler of circulating fluidized bed boiler - Google Patents

Abstract

The utility model relates to an air and slag separator technical field specifically is a circulating fluidized bed boiler cold sediment machine return air system convolution formula air and slag separation structure, including a toper section of thick bamboo, a toper section of thick bamboo is hollow shell structure, the tangential position on toper section of thick bamboo upper portion sets up the collecting pipe, toper section of thick bamboo top surface sets up the air exit, air exit position joint has a center section of thick bamboo, center section of thick bamboo can adjust its top surface with distance between the toper section of thick bamboo top surface, toper bobbin base portion sets up the collection cinder notch, collection cinder notch position is equipped with the collection cinder pipe, the collection cinder pipe is kept away from the below of the one end of collection cinder notch is equipped with scraper blade slag conveyor. Has the beneficial effects that: the utility model discloses a formula structural design revolves, and its structural design satisfies the requirement of cold sediment machine return air promptly, can realize the separation of wind sediment again, reduces the wearing and tearing of return air pipe to and the wearing and tearing to each part of electric precipitator behind the large granule entering dust remover.

Description

Rotary air-slag separation structure of air return system of slag cooler of circulating fluidized bed boiler

Technical Field

The utility model relates to an air-slag separation device technical field specifically is a circulating fluidized bed boiler cold sediment machine return air system convolution formula air-slag separation structure.

Background

When the 300MW circulating fluidized bed boiler slag cooler operates, the end part of the slag cooler is maintained in a negative pressure state by utilizing the negative pressure behind the air preheater after the end part sealing return air pipe is connected to the air preheater of the boiler. In actual operation, however, a return air system of the slag cooler can carry large-particle ash, so that the abrasion of a return air pipe is serious, and the leakage of the return air pipe is frequent; and too much ash slag accumulation can block the return air pipe and influence the normal operation of the machine. Moreover, the air return system carries large particles to directly enter the back flue of the air preheater, and the heating surface of the low-temperature economizer and the airflow distribution plate of the electric dust collector are abraded.

SUMMERY OF THE UTILITY MODEL

The not enough to prior art, the utility model provides a circulating fluidized bed boiler cold sediment machine return air system convolution formula wind sediment isolating construction has solved the problem of carrying the large granule lime-ash among the current cold sediment machine return air system.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a cold sediment machine return air system of circulating fluidized bed boiler revolves formula wind sediment isolating construction, includes a toper section of thick bamboo, a toper section of thick bamboo is hollow shell structure, the tangential position on toper section of thick bamboo upper portion sets up the collecting pipe, toper section of thick bamboo top surface sets up the air exit, air exit position joint has a center section of thick bamboo, center bobbin base portion with toper section of thick bamboo intercommunication, center section of thick bamboo can adjust its top surface with distance between the toper section of thick bamboo top surface, the bottom sets up the collection cinder notch, collection cinder notch position is equipped with the collection slag pipe, the collection slag pipe is kept away from the below of the one end of collection cinder notch is equipped with scraper blade slag conveyor, the port that the one end of collection cinder notch was kept away from to the collection slag pipe is located between the scraper blade height of scraper blade slag conveyor and its curb plate height.

As a further improvement of the present invention, the bottom surface of the manifold is an inclined plane, the inclined plane by the position where the conical cylinder is kept away from by the manifold to the position that manifold and conical cylinder are connected slopes down gradually.

As a further improvement, the upper portion that a toper section of thick bamboo one end was kept away from to the collecting pipe is equipped with the air inlet, the tip that a toper section of thick bamboo one end was kept away from to the collecting pipe is encapsulated situation.

As a further improvement, the conical section of thick bamboo top surface is equipped with a plurality of fixture blocks, and is a plurality of the fixture block is evenly arranged along the periphery of air exit, the fixture block is used for the joint a central section of thick bamboo. A plurality of rows of bayonets are arranged on the side portion of the central cylinder.

As a further improvement of the utility model, the bottom surface of the slag collecting pipe and the horizontal surface of the slag collecting opening form an angle of 25 degrees.

Compared with the prior art, the utility model following beneficial effect possesses: the utility model adopts the rotary structural design, the structural design not only meets the requirement of the air return of the slag cooler, but also can realize the separation of air and slag, reduce the abrasion of the return air pipe and the abrasion of large particles on each part of the electric precipitator after entering the precipitator; the utility model discloses the collector pipe that is equipped with can carry out dilatation deceleration with the air that cold sediment machine tip return air got into, and the large granule lime-ash leans on the dead weight separation, gets into a toper section of thick bamboo along the collector pipe, and the return air that carries the fine particle circles round along a toper section of thick bamboo, relies on centrifugal force to get into the collection cinder notch of toper section of thick bamboo lower part with the lime-ash after-separating, can prevent that the particulate matter from getting into the machine with the large granule in the gas and the small granule full filtration, causes the damage to the machine.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the manifold of the present invention;

FIG. 3 is a sectional view of the slag collecting pipe of the present invention;

fig. 4 is a schematic structural view of the central tube of the present invention.

In the figure: 1. a tapered barrel; 2. a collector pipe; 3. an air outlet; 4. a central barrel; 5. a slag collection port; 6. a slag collecting pipe; 7. a scraper slag conveyor; 8. an air inlet; 9. a clamping block; 10. and (4) a bayonet.

Detailed Description

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

As shown in figure 1, a cold sediment machine return air system of circulating fluidized bed boiler convolution formula wind sediment isolating construction, including a toper section of thick bamboo 1, toper section of thick bamboo 1 is hollow shell structure, and the tangential position on toper section of thick bamboo upper portion sets up collecting pipe 2, and the air can be followed the tangential position entering toper section of thick bamboo 1 of toper section of thick bamboo 1, can make and produce the whirlwind in the toper section of thick bamboo 1. As shown in fig. 2, the bottom surface of collecting pipe 2 is the inclined plane, and the inclined plane is inclined downwards gradually by collecting pipe 2 to the position that collecting pipe 2 and a cone 1 are connected of keeping away from the position of cone 1, can carry out the dilatation deceleration with the air that gets into, and the large granule can fall to the inside bottom surface of collecting pipe 2 to can follow the inside bottom surface of collecting pipe 2 and get into cone 1, the upper portion that collecting pipe 2 kept away from 1 one end of cone is equipped with air inlet 8, and the tip that 1 one end of cone was kept away from to collecting pipe 2 is encapsulated situation.

Cold sediment machine tip return air gets into and passes through the dilatation deceleration behind the collector pipe 2, and the large granule lime-ash leans on the dead weight to separate, gets into a toper section of thick bamboo 1 along collector pipe 2. The return air carrying fine particles circles around the conical cylinder 1, and the ash and slag are separated by means of centrifugal force and then enter the lower end of the conical cylinder 1.

As shown in fig. 1 and 4, an air outlet 3 is arranged on the top surface of a conical tube 1, a plurality of fixture blocks 9 are arranged on the top surface of the conical tube 1, the fixture blocks 9 are uniformly arranged along the periphery of the air outlet 3, a central tube 4 is clamped at the position of the air outlet 3, a plurality of rows of clamping openings 10 are arranged on the side portion of the central tube 4, the fixture blocks 9 are matched with the clamping openings 10, so that the central tube 4 is clamped with the air outlet 3, and the central tube 4 can discharge clean air separated from air and slag in the conical tube 1; and because the lateral part of the central cylinder 4 is provided with a plurality of rows of bayonets 10, different bayonets 10 can be adjusted to be matched with the clamping blocks 9, so that the height of the central cylinder 4 extending out of the air outlet 3 can be adjusted, and the central cylinder 4 can be conveniently adjusted to meet the requirements of different working conditions of the circulating fluidized bed boiler.

As shown in fig. 3, the bottom of the conical barrel 1 is provided with a slag collecting opening 5, the position of the slag collecting opening 5 is provided with a slag collecting pipe 6, the axis of the slag collecting pipe 6 forms a 25-degree angle with the horizontal plane of the slag collecting opening 5, a scraper slag conveyer 7 is arranged below one end of the slag collecting pipe 6, which is far away from the slag collecting opening 5, the port of one end of the slag collecting pipe 6, which is far away from the slag collecting opening 5, is arranged between the height of a scraper of the scraper slag conveyer 7 and the height of a side plate thereof, and clean return air leaves along the central barrel 4 after cyclone separation of the conical barrel 1.

The lime-ash gets into scraper blade slag conveyor 7 through collection sediment mouth 5 through collection sediment pipe 6, and the lime-ash piles up into the heap at scraper blade slag conveyor 7 at the lime-ash of collection sediment in the pipe 6, and the lime-ash flow in the collection sediment pipe is stopped, carries out the shutoff to collection sediment pipe 6, and then makes the 5 shutoff of collection sediment mouths of 1 lower extreme of a toper section of thick bamboo, prevents that the air from this department from flowing out a toper section of thick bamboo, guarantees that the air in the toper section of thick bamboo 1 can be by the normal discharge of a central section of thick bamboo 4, and then makes the return air system can normal operating. After the scraper slag conveyer 7 conveys the accumulated ash, the ash in the slag collecting pipe 6 falls into a new partition on the scraper slag conveyer 7, the slag collecting pipe 6 is plugged again, and the ash is continuously separated from the conical barrel 1 and is discharged into the slag collecting pipe 6. Because a certain amount of ash residue is always maintained in the slag collecting pipe 6, the lower end of the conical cylinder 1 is sealed. When the conical cylinder 1 is used for carrying out air-slag separation on air, the scraper slag conveyor 7 is linked, so that the outlet end of the slag collecting pipe 6 is always kept with a certain amount of ash slag to plug the slag collecting pipe 6, and the normal work of the conical cylinder 1 is ensured.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a cold sediment machine return air system of circulating fluidized bed boiler formula of circling round wind sediment isolating construction, its characterized in that, includes a toper section of thick bamboo (1), a toper section of thick bamboo (1) is hollow shell structure, the tangent line position on toper section of thick bamboo upper portion sets up collector tube (2), a toper section of thick bamboo (1) top surface sets up air exit (3), air exit (3) position joint has a center section of thick bamboo (4), center section of thick bamboo (4) bottom with toper section of thick bamboo (1) intercommunication, center section of thick bamboo (4) can adjust its top surface with distance between the toper section of thick bamboo (1) top surface, the bottom sets up album cinder notch (5), album cinder notch (5) position is equipped with collection slag pipe (6), collection slag pipe (6) are kept away from the below of the one end of album cinder notch (5) is equipped with scraper blade slag conveyor (7), the one end that collection slag pipe (6) kept away from album cinder notch (5) is located between the scraper blade height of scraper blade (7) and its curb plate height.

2. The rotary air-slag separation structure of the air return system of the circulating fluidized bed boiler slag cooler according to claim 1, characterized in that the bottom surface of the collecting pipe (2) is an inclined surface which is gradually inclined downwards from the position where the collecting pipe (2) is far away from the conical cylinder (1) to the position where the collecting pipe (2) is connected with the conical cylinder (1).

3. The rotary air-slag separation structure of the air return system of the circulating fluidized bed boiler slag cooler according to claim 2, wherein an air inlet (8) is formed in the upper part of one end of the collecting pipe (2) far away from the conical cylinder (1), and the end part of the collecting pipe (2) far away from the conical cylinder (1) is in a sealed state.

4. The rotary air-slag separation structure of the air return system of the circulating fluidized bed boiler slag cooler according to claim 1, wherein a plurality of clamping blocks (9) are arranged on the top surface of the conical cylinder (1), the clamping blocks (9) are uniformly arranged along the periphery of the air outlet (3), the clamping blocks (9) are used for clamping the central cylinder (4), and a plurality of rows of bayonets (10) are arranged on the side portion of the central cylinder (4).

5. The rotary air-slag separation structure of the air return system of the circulating fluidized bed boiler slag cooler according to claim 1, wherein the bottom surface of the slag collecting pipe (6) forms an angle of 25 degrees with the horizontal plane of the slag collecting port (5).

Images