CN221402999U - Outlet dust collecting device of slag cooler of thermal power plant - Google Patents

Abstract

The utility model relates to a dust collecting device for an outlet of a slag cooler of a thermal power plant, which comprises a dust collecting cover arranged at the outlet of the slag cooler, a dust collecting pipe and a secondary fan, wherein one end of the dust collecting pipe is communicated with the outlet of the dust collecting cover, the other end of the dust collecting pipe is communicated with the inlet end of the secondary fan, and the outlet end of the secondary fan is used for being communicated with the air inlet end of a boiler. According to the utility model, under the action of the secondary air blower, the dust collected by the dust collecting cover and the air are simultaneously introduced into the boiler through the dust collecting pipe, so that the problem of dust emission at the outlet of the slag cooler is solved, oxygen in the air is combusted through the boiler, and the combusted tail flue communicated with the boiler is discharged into the chimney, so that the oxygen content of the exhaust gas of the chimney is ensured to be within the environment-friendly value range, and the combustion effect in the boiler is improved.

Description

Outlet dust collecting device of slag cooler of thermal power plant

Technical Field

The utility model relates to the technical field of thermal power plant system engineering, in particular to a dust collecting device at an outlet of a slag cooler of a thermal power plant.

Background

In power generation systems of thermal power plants, a circulating fluidized bed boiler is used for generating high-temperature and high-pressure steam.

Referring to fig. 5, in the system, on one hand, a slag cooler 2 is communicated with the bottom of a boiler 1, a conveyor 21 is arranged at the outlet of the slag cooler 2, slag is discharged through the conveyor 21, meanwhile, a dust remover 12 is communicated with a tail flue 11 of the boiler 1, and the slag is discharged into a chimney 13 after being removed by the dust remover 12; on the other hand, when the slag is discharged to the conveyor 21 at the outlet of the slag cooler 2, a large amount of dust is generated, and in order to treat the dust, the dust collection cover 3 is provided at the outlet of the slag cooler 2, and the dust collection cover 3 is connected to the boiler tail flue 11 and the duct of the dust catcher 12 through the duct, and the dust is discharged to the chimney 13 together through the negative pressure formed by the dust discharge of the boiler tail flue 11. Wherein, a draught fan 121 is arranged on a pipeline communicated with the dust remover 12 and the chimney 13; and an environmental protection detection point 131 is provided on the chimney 13 to detect the discharged gas, and the oxygen content thereof is one of detection objects.

However, in the process of collecting the raised dust at the outlet of the slag cooler 2 through the dust collection cover 3, oxygen in the air is collected at the same time, and the oxygen is mixed and discharged from the chimney 13; the oxygen can lead the oxygen amount value of the environmental protection detection point to be increased by (1-2)%, and does not accord with the relevant regulations about the environmental protection index of the boiler that the oxygen content is between 6% and 8%.

Disclosure of utility model

The utility model provides a dust collecting device at an outlet of a slag cooler of a thermal power plant, which can collect and treat flying dust at the outlet of the slag cooler and ensure that the oxygen content of the exhaust gas of a chimney is in an environment-friendly value range.

The technical scheme for solving the technical problems is as follows:

The utility model provides a cold sediment machine export dust arrester installation of steam power plant, is including being used for setting up in the dust collecting cover of cold sediment machine exit, still includes dust collecting pipe and secondary fan, the one end of dust collecting pipe communicate in the export of dust collecting cover, the other end communicate in the entrance point of secondary fan, just the exit end of secondary fan is used for the air inlet end of intercommunication boiler.

The beneficial effects of the utility model are as follows: under the effect of secondary fan, the raise dust and the air that will gather dust the cover and collect through the pipe that gathers dust are leading-in to the boiler simultaneously, solve the problem of cold sediment machine export raise dust to burn through the oxygen in the air of boiler, the afterbody flue through boiler intercommunication after the burning is discharged into the chimney, has avoided former cold sediment machine dust absorption pipeline direct intercommunication boiler afterbody flue, causes the problem that the boiler discharged fume oxygen content increased, and then guarantees that the oxygen content of chimney exhaust gas is in environmental protection value range, and improves the combustion effect in the boiler.

On the basis of the technical scheme, the utility model can be improved as follows.

Further, the dust collecting pipe comprises a dust discharging pipe and an air suction pipe, one end of the dust discharging pipe is communicated with the outlet end of the dust collecting cover, the other end of the dust discharging pipe is communicated with the side wall of the middle of the air suction pipe, one end of the air suction pipe is communicated with air, the other end of the air suction pipe is communicated with the inlet end of the secondary air fan, and the outlet end of the secondary air fan is communicated with an exhaust pipeline communicated with the air inlet end of the boiler.

The beneficial effects of adopting the further scheme are as follows: forming negative pressure in a dust exhaust pipe through an inlet end of a secondary air blower, so that dust collected by a dust collecting cover and air are simultaneously guided into an air suction pipe through the dust exhaust pipe and then are guided into a boiler, dust at an outlet of a slag cooler is collected and treated, and the oxygen content of chimney exhaust gas is ensured to be within an environment-friendly value range; meanwhile, one end of the air suction pipe is communicated with air, so that the full combustion of the boiler is ensured.

Further, the dust exhaust pipe and the air suction pipe are square pipes, and the middle part of the dust exhaust pipe and the two ends of the air suction pipe are slidably connected with adjusting plates along the pipe diameter direction.

The beneficial effects of adopting the further scheme are as follows: by the sliding of the adjusting plate, the path opening of the dust exhaust pipe for dust and air to pass through is changed, and the opening of the air suction pipe for sucking air is changed, so that the negative pressure in the dust exhaust pipe and the air suction pipe is controlled to adjust the discharge speed.

Further, the lower end of the adjusting plate is slidably connected with the dust exhaust pipe or the air suction pipe, and the upper end of the adjusting plate extends out of the dust exhaust pipe or the air suction pipe and is in threaded connection with a limiting rod.

The beneficial effects of adopting the further scheme are as follows: so as to form the limit function of the adjusting plate after sliding through the limit rod.

Further, a dust remover is arranged on the dust exhaust pipe.

The beneficial effects of adopting the further scheme are as follows: dust sucked by the dust collecting hood is treated by the dust remover so as to reduce dust entering the boiler through the air suction pipe and abrasion of the impeller of the secondary air blower.

Further, the air suction pipe is provided with a silencer, and the silencer is connected between the joint of the dust exhaust pipe and the air suction pipe and the other end of the air suction pipe.

The beneficial effects of adopting the further scheme are as follows: to eliminate or reduce noise generated during operation of the entire apparatus by the muffler.

Further, the middle part of the air suction pipe is vertically bent upwards, and the lower part of the bending section of the air suction pipe is communicated with an accumulated ash discharging pipe.

The beneficial effects of adopting the further scheme are as follows: after the dust exhaust pipe discharges the dust into the air suction pipe, in the process of discharging the dust to the boiler through the vertical section of the air suction pipe, the dust is accumulated in the dust accumulation and discharge pipe, so that the amount of the dust entering the boiler is reduced.

Further, the dust collecting and discharging pipe is vertically arranged, the upper end of the dust collecting and discharging pipe is communicated with the air suction pipe, the lower end of the dust collecting and discharging pipe is downwards opened, and the lower end of the dust collecting and discharging pipe is transversely connected with a dust blocking plate in a sliding mode.

The beneficial effects of adopting the further scheme are as follows: in long-term dust deposition mouth, the dust can be cleaned by sliding the dust baffle.

Further, a filter plate is fixed in the bending section of the air suction pipe, and the filter plate and the accumulated ash discharging pipe are communicated with the opening of the air suction pipe and are arranged oppositely.

The beneficial effects of adopting the further scheme are as follows: the dust collecting effect is improved by further blocking the dust by the filter plate and enabling the dust to fall into the dust collecting and discharging pipe.

Further, a preheater is arranged on the exhaust pipeline.

The beneficial effects of adopting the further scheme are as follows: the gas introduced into the boiler is preheated by the preheater, so that the energy consumption of the boiler is reduced, and the heat efficiency is improved.

Drawings

FIG. 1 is a flow chart of the present utility model;

FIG. 2 is a first partial cross-sectional view of the present utility model, primarily showing a first aspect of the connection of the dust exhaust pipe and the conditioning plate;

FIG. 3 is a second partial cross-sectional view of the present utility model, primarily showing a second aspect of the connection of the dust exhaust pipe and the conditioning plate;

FIG. 4 is a third partial cross-sectional view of the present utility model, mainly shown as an air suction pipe and accumulated ash discharge pipe connection structure;

Fig. 5 is a flow chart of the prior art.

In the drawings, the list of components represented by the various numbers is as follows:

1. A boiler; 11. a tail flue; 12. a dust remover; 121. an induced draft fan; 13. a chimney; 131. an environment-friendly detection point;

2. A slag cooler; 21. a conveyor;

3. a dust collection cover;

4. A dust collection pipe; 41. a dust exhaust pipe; 411. a dust remover; 42. an air suction pipe; 421. a muffler; 422. a preheater;

5. A secondary air blower;

6. An adjusting plate; 61. a limit rod;

7. an ash accumulation and discharge pipe; 71. an ash blocking plate; 72. a filter plate;

8. And an inlet adjusting baffle of the secondary air blower.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Example 1

As shown in fig. 1, the dust collecting device at the outlet of the slag cooler of the thermal power plant comprises a dust collecting cover 3 arranged at the outlet of the slag cooler 2, a dust collecting pipe 4 and a secondary air blower 5, wherein the dust collecting pipe 4 is communicated with the outlet of the dust collecting cover 3, one end of the dust collecting pipe 4 is communicated with the outlet of the dust collecting cover 3, the other end of the dust collecting pipe is communicated with the inlet end of the secondary air blower 5, and the outlet end of the secondary air blower 5 is used for being communicated with the air inlet end of the boiler 1.

The beneficial effects of this embodiment are: under the effect of the secondary air blower 5, the dust collected by the dust collecting hood 3 and air are simultaneously introduced into the boiler 1 through the dust collecting pipe 4, the problem of dust emission at the outlet of the slag cooler 2 is solved, oxygen in the air is combusted through the boiler 1, the combusted tail flue 11 communicated with the boiler 1 is discharged into the chimney 13, the oxygen content of the exhaust gas of the chimney is further ensured to be in an environment-friendly value range, and the combustion effect in the boiler 1 is improved.

Further, the tail flue 11 of the boiler 1 is communicated with a dust remover 12, and is discharged into a chimney 13 after being dedusted by the dust remover 12; wherein, a draught fan 121 is arranged on a pipeline communicated with the dust remover 12 and the chimney 13; and an environmental protection detection point 131 is provided on the chimney 13 to detect the discharged gas, and the oxygen content thereof is one of detection objects.

Both the induced draft fan 121 and the secondary fan 5 may be commercially available fans, and fans in which the driving motor is located outside the fan housing may be used.

Example 2

As shown in fig. 1, on the basis of embodiment 1, the dust collecting pipe 4 includes a dust exhaust pipe 41 and an air suction pipe 42, one end of the dust exhaust pipe 41 is communicated with the outlet end of the dust collecting hood 3, the other end is communicated with the middle side wall of the air suction pipe 42, one end of the air suction pipe 42 is communicated with air, the other end is communicated with the inlet end of the secondary air blower 5, and the outlet end of the secondary air blower 5 is communicated with an exhaust pipeline for communicating with the air inlet end of the boiler 1.

The beneficial effect of adopting the preferred scheme in the embodiment is that the secondary air blower 5 forms negative pressure in the dust exhaust pipe 41, so that the dust collected by the dust collection cover 3 and the air are simultaneously guided into the air suction pipe 42 through the dust exhaust pipe 41 and then are guided into the boiler 1, the dust at the outlet of the slag cooler 2 is collected and treated, and the oxygen content of the gas exhausted by the chimney 13 is ensured to be in the environment-friendly value range; at the same time, one end of the air suction pipe 42 is connected to the air, ensuring the full combustion of the boiler 1.

Wherein, the dust exhaust pipe 41 and the air suction pipe 42 can be fixed on the ground by adopting a bracket for installation.

Example 3

As shown in fig. 1 to 3, on the basis of embodiments 1 and 2, the dust exhaust pipe 41 and the air suction pipe 42 are square pipes, and the middle part of the dust exhaust pipe 41 and the two ends of the air suction pipe 42 are slidably connected with the adjusting plate 6 along the pipe diameter direction.

The preferred embodiment has the advantages that the path opening of the dust exhaust pipe 41 for dust and air to pass through is changed and the opening of the air suction pipe 42 for sucking air is changed by the sliding of the adjusting plate 6, so that the negative pressure in the dust exhaust pipe 41 and the air suction pipe 42 is controlled to adjust the discharge speed.

As a specific scheme of the above embodiment, a chute is formed through the upper pipe walls of the dust exhaust pipe 41 and the air suction pipe 42, and the chute is formed on both side walls of the dust exhaust pipe 41 and the air suction pipe 42 in the horizontal direction at the same time, and the adjusting plate 6 is slidably connected to the chute, so as to adjust the pipe diameter of the dust exhaust pipe 41 or the air suction pipe 42.

As one of the specific arrangement modes of the adjusting plate 6, the adjusting plate 6 is vertically arranged perpendicular to the pipe direction of the dust exhaust pipe 41 or the air suction pipe 42.

As one of the specific arrangement modes of the adjusting plate 6, the adjusting plate 6 is arranged obliquely, and one end of the adjusting plate which is slidably connected to the dust discharge pipe 41 or the air suction pipe 42 is inclined toward the direction corresponding to the wind direction in the dust discharge pipe 41 or the air suction pipe 42. At this time, the resistance of the regulating plate 6 to the wind is reduced.

Further, a secondary air inlet adjusting baffle 8 is provided at the inlet end of the secondary air blower 5 to adjust the negative pressure in the air suction pipe 42. Specifically, the secondary air inlet adjusting baffle 8 may be a double-layer shutter type baffle.

Example 4

As shown in fig. 1 to 3, on the basis of embodiments 1 to 3, the lower end of the adjusting plate 6 is slidably connected to the dust discharge pipe 41 or the air suction pipe 42, and the upper end of the adjusting plate 6 extends out of the dust discharge pipe 41 or the air suction pipe 42 and is screw-connected with the stopper 61.

The beneficial effect of the preferred solution in the above embodiment is to form a limit action on the sliding adjusting plate 6 by the limit rod 61.

Further, one end of the limit rod 61 is screwed to one side of the adjusting plate 6, a plurality of screw grooves are formed in one side of the adjusting plate 6 at intervals along the vertical direction, and the limit rod 61 is screwed to the screw grooves at different positions, so that the adjusting plate 6 is slidably connected to the dust exhaust pipe 41 or the air suction pipe 42 in different lengths.

Further, the limit rod 61 is obliquely arranged, one end of the limit rod 61 is in threaded connection with the dust exhaust pipe 41 or the air suction pipe 42 and is abutted against the pipe wall of the dust exhaust pipe 41 or the air suction pipe 42, so that limit is realized, and meanwhile, the other end of the limit rod 61 is far away from the pipe wall of the dust exhaust pipe 41 or the air suction pipe 42, so that force is applied to the limit rod 61, and the limit rod 61 is rotated.

Further, the screw groove is opened at one side of the adjusting plate 6 facing away from the wind direction, so as to prevent flowing dust from entering the screw groove.

Example 5

As shown in fig. 1, on the basis of embodiments 1 to 4, a dust remover 411 is provided on the dust discharge pipe 41.

The advantageous effect of adopting the preferred scheme in the above embodiment is that the dust sucked by the dust collection cover 3 is treated by the dust remover 411 to reduce dust entering the boiler 1 through the suction pipe 42 and abrasion of the secondary fan impeller.

The dust collector 411 may be an existing bag collector, a wet collector, or the like. The inlet end of the dust remover 411 is communicated with the outlet end of the dust collection cover 3, and the outlet end of the dust remover 411 is communicated with the air suction pipe 42.

Further, the dust remover 411 is disposed at the rear side of the adjusting plate 6 on the dust discharge pipe 41 to control the dust removal progress of the dust remover 411 through the adjusting plate 6.

Example 6

As shown in fig. 1, in the embodiments 1 to 5, a muffler 421 is provided on the air suction pipe 42, and the muffler 421 is connected between the connection point of the dust discharge pipe 41 and the air suction pipe 42 and the other end of the air suction pipe 42.

The advantageous effect of the preferred embodiment of the above embodiment is to eliminate or reduce noise generated during the operation of the whole apparatus by the muffler 421.

The muffler 421 may be an existing resistive muffler.

Example 7

As shown in fig. 1 and 4, on the basis of embodiments 1-6, the middle part of the air suction pipe 42 is vertically bent upwards, and the lower part of the bent section of the air suction pipe 42 is communicated with the accumulated ash discharging pipe 7.

The beneficial effect of adopting the preferred scheme in the above embodiment is that, after the dust exhaust pipe 41 discharges the raise dust into the air suction pipe 42, in the process of discharging the raise dust to the boiler 1 through the vertical section of the air suction pipe 42, the dust gathers in the dust accumulation and discharge pipe 7 so as to reduce the amount of the dust entering into the boiler 1.

Example 8

As shown in fig. 1 and 4, on the basis of embodiments 1 to 7, the dust collecting and discharging tube 7 is vertically arranged, the upper end is communicated with the air suction tube 42, the lower end is downwardly opened, and the lower end of the dust collecting and discharging tube 7 is transversely and slidably connected with the dust baffle 71.

The preferred embodiment has the advantage that dust cleaning can be performed by sliding the dust baffle 71 at the long-term dust accumulation port.

Specifically, one end of the ash blocking plate 71 is laterally slidably connected to the lower end of the ash accumulation and discharge pipe 7, and the other end thereof extends out of the ash accumulation and discharge pipe 7 and is bent so as to apply a force to the ash blocking plate 71 through the bent end of the ash blocking plate 71.

Example 9

As shown in fig. 1 and 4, on the basis of embodiments 1 to 8, a filter plate 72 is fixed in the bent section of the air suction pipe 42, and the filter plate 72 is disposed opposite to the opening of the accumulated ash discharging pipe 7 communicating with the air suction pipe 42.

The beneficial effect of adopting the preferred scheme in the embodiment is that the filter plate 72 is used for further blocking the raised dust and reducing the dust in the accumulated dust discharging pipe 7, so that the dust collecting effect is improved.

Specifically, the filter plate 72 is a plate body structure having a plurality of holes formed therethrough, and is disposed so as to be inclined as a whole, with its upper end fixed to the inner wall of the air intake pipe 42 and its lower end inclined toward the air outlet end of the air intake pipe 42.

Example 10

As in fig. 1, on the basis of embodiments 1 to 9, a preheater 422 is provided on the exhaust line.

The beneficial effect of adopting the preferred scheme in the embodiment is that the preheater 422 is used for preheating the gas introduced into the boiler 1, so that the energy consumption of the boiler 1 is reduced.

The preheater 422 preheats the air before entering the boiler to a heating surface at a certain temperature by using the flue gas in the tail flue of the boiler through the inner cooling fins.

In the description of the present utility model, it should 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", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. The utility model provides a cold sediment machine export dust arrester installation of thermal power plant, is including being used for setting up in dust collecting cover (3) of cold sediment machine (2) exit, its characterized in that still includes dust collecting pipe (4) and secondary air machine (5) _, one end of dust collecting pipe (4) communicate in the export of dust collecting cover (3), the other end communicate in the entrance point of secondary air machine (5), just the exit end of secondary air machine (5) is used for the air inlet end of intercommunication boiler (1).

2. The dust collecting device for the outlet of the slag cooler of the thermal power plant according to claim 1, wherein the dust collecting pipe (4) comprises a dust discharging pipe (41) and an air suction pipe (42), one end of the dust discharging pipe (41) is communicated with the outlet end of the dust collecting cover (3), the other end of the dust discharging pipe is communicated with the middle side wall of the air suction pipe (42), one end of the air suction pipe (42) is communicated with air, the other end of the air suction pipe is communicated with the inlet end of the secondary air fan (5), and the outlet end of the secondary air fan (5) is communicated with an exhaust pipeline which is communicated with the air inlet end of the boiler (1).

3. The dust collecting device for the outlet of the slag cooler of the thermal power plant according to claim 2, wherein the dust discharging pipe (41) and the air suction pipe (42) are square pipes, and the middle part of the dust discharging pipe (41) and the two ends of the air suction pipe (42) are slidably connected with an adjusting plate (6) along the pipe diameter direction.

4. A dust collector at the outlet of a slag cooler of a thermal power plant according to claim 3, wherein the lower end of the adjusting plate (6) is slidably connected to the dust exhaust pipe (41) or the air suction pipe (42), and the upper end of the adjusting plate (6) extends out of the dust exhaust pipe (41) or the air suction pipe (42) and is in threaded connection with a limit rod (61).

5. The dust collection device at the outlet of a slag cooler of a thermal power plant according to claim 4, wherein the dust discharge pipe (41) is provided with a dust remover (411).

6. The dust collecting device for the outlet of the slag cooler of the thermal power plant according to claim 4, wherein: the dust exhaust device is characterized in that a silencer (421) is arranged on the air suction pipe (42), and the silencer (421) is connected between the joint of the dust exhaust pipe (41) and the air suction pipe (42) and the other end of the air suction pipe (42).

7. The dust collecting device for the outlet of the slag cooler of the thermal power plant according to claim 2, wherein the middle part of the air suction pipe (42) is vertically bent upwards, and the lower part of the bent section of the air suction pipe (42) is communicated with an ash accumulation and discharge pipe (7).

8. The dust collection device for the outlet of the slag cooler of the thermal power plant according to claim 7, wherein the dust collecting and discharging pipe (7) is vertically arranged, the upper end of the dust collecting and discharging pipe is communicated with the air suction pipe (42), the lower end of the dust collecting and discharging pipe (7) is downwards opened, and the lower end of the dust collecting and discharging pipe (7) is transversely connected with an ash blocking plate (71) in a sliding manner.

9. The dust collection device for the outlet of the slag cooler of the thermal power plant according to claim 7, wherein a filter plate (72) is fixed in the bending section of the air suction pipe (42), and the filter plate (72) is arranged opposite to the accumulated ash discharging pipe (7).

10. A slag cooler outlet dust collector apparatus of a thermal power plant according to claim 2, characterized in that a preheater (422) is provided on the exhaust duct.