JP3241742U - flue and generator unit - Google Patents

Abstract

A flue and power generation unit that facilitates the removal of solid particles in flue gas. A second housing (2) is provided in a flue chamber (11) in a flue (100), and an ash falling chamber (21) is defined by the inner wall surface of the first housing (1) and the outer wall surface of the second housing, A smoke exhaust chamber 22 is defined by the inner wall surface of the second housing, and an ash drop through hole 23 communicates with the smoke exhaust chamber and the ash drop chamber. As a result, after the exhausted smoke flows into the smoke exhaust chamber (flue chamber) from the first inlet 12, it moves along the extension direction of the smoke exhaust chamber, and then exhausts the smoke through the first outlet 13. discharged from the chamber (flue chamber). A portion of solid particles in the flue gas (large in mass) move to the ash outlet 14 in the flue gas chamber and are discharged from the flue. Some solid particles collide with the second housing in the process of flowing with the flue gas, and enter the ash falling chamber through the ash falling through hole in the process of colliding. [Selection drawing] Fig. 1

Description

The present invention relates to the technical field of denitrification reactor inlet flue structure, and more particularly to the flue and generator unit.

In the related art, the denitrification inlet flue of a coal-fired power generator unit generally starts at the exit position of the economizer, passes through the vertical rising flue into the top horizontal flue, and then enters the denitrification reactor. , and into the air preheater inlet flue. This type of flue design generally places the denitration ash hopper at the bottom of a vertically rising flue so that coarse particles that cannot rise with the flue gas into the reactor fall into the ash hopper and are carried out of the denitration system. ing. However, the ash removal rate of this method is low, the effect is not significant, and coarse particle fly ash entering the catalyst causes subsequent wear of internal components such as the catalyst.

The present invention aims to solve at least one technical problem in the related art to some extent. Accordingly, embodiments of the present invention provide a flue and generator unit.

A flue according to an embodiment of the present invention includes a first housing and a second housing, the first housing comprising a flue chamber, a first inlet communicating with the flue chamber, a first an outlet and an ash outlet, the ash outlet being provided at the bottom of the flue chamber, the first inlet configured to introduce flue gas into the flue chamber, the first an outlet configured to exhaust flue gas in the flue chamber, and an ash outlet configured to exhaust solid particles in the flue chamber;
The second housing is located in the flue chamber, the first housing is fitted outside the second housing, and the first housing and the second housing are spaced apart. and the distance between the inner wall surface of the first housing and the outer wall surface of the second housing is equal to or less than a predetermined value, and the inner wall surface of the first housing and the outer wall surface of the second housing are separated from each other. and a smoke exhaust chamber defined by an inner wall surface of the second housing, the smoke exhaust chamber communicating with the first inlet, the first outlet and the ash discharge port. , the ash drop chamber communicates with the ash discharge port, the second housing is provided with an ash drop through hole penetrating the second housing, the ash drop through hole is connected to the smoke exhaust chamber and the ash drop communicate with the room.

Therefore, the flue according to the embodiment of the present invention has the advantage of being easy to remove the solid particles in the flue gas.

In some embodiments, the first housing includes a body, the body and the second housing are both vertically extending annular housings, and the body fits outside the second housing. combined and defining with the second housing the ash drop chamber, the first inlet being located below the first outlet and the ash discharge port being provided at the bottom of the body; The top of the ash falling chamber is closed, and the outlet of the ash falling chamber is provided at the bottom of the ash falling chamber and faces the ash discharge port.

In some embodiments, there are multiple ash-falling through-holes, the ash-falling through-holes are elongated or block-shaped, the plurality of ash-falling through-holes are spaced apart,
Alternatively, the ash drop through hole extends spirally in the extending direction of the second housing.

In some embodiments, the distance between the first housing and the second housing in the medial-lateral direction is 10 cm or less.

In some embodiments, the smoke exhaust chamber is provided with swirling means, the swirling means swirls the exhaust smoke that has flowed into the smoke exhaust chamber, and the swirling means rotates at least one of the swirl vanes and the deflector plates. include.

In some embodiments, the smoke evacuation chamber comprises a plurality of compartments, each compartment communicating with the first inlet, the first outlet and the ash outlet, the compartments being horizontally aligned. and the swirling means cooperates with the plurality of compartments to swirl the flue gas entering the compartments.

In some embodiments, a plurality of said compartments are arranged side by side in a first horizontal direction, with opposite swirl directions of smoke exhaust in two adjacent said compartments.

In some embodiments, the projection of each said compartment is one of a square, a circle and a regular polygon in a vertical cross-section.

In some embodiments, a plurality of partitions are provided in the second housing, the partitions partition the smoke exhaust chamber into a plurality of the compartments, and the thickness direction of the partitions is horizontal. Each partition plate has a partition plate chamber and a partition plate through hole, the partition plate chamber communicates with the ash discharge port, the partition plate through hole penetrates the partition plate, and the partition plate chamber includes the It communicates with the smoke exhaust chamber through the partition plate through hole.

The present invention comprises an economizer, a denitrification reactor, and the above flue, wherein the outlet of the economizer communicates with the first inlet of the flue, and the inlet of the denitrification reactor communicates with the flue. A generator unit is further provided in communication with the first outlet of the.

1 is a front view of a flue according to an embodiment of the present invention; FIG. 1 is a top view of a flue according to an embodiment of the present invention; FIG. FIG. 2 is a schematic diagram of a flue in use according to an embodiment of the present invention;

Embodiments of the invention will now be described in more detail, examples of which are illustrated in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to illustrate the invention and should not be understood as limiting the invention.

Hereinafter, a flue 100 according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1-3, a flue 100 according to an embodiment of the present invention includes a first housing 1 and a second housing 2. As shown in FIG.

The first housing 1 includes a flue chamber 11, a first inlet 12, a first outlet 13 and an ash outlet 14 communicating with the flue chamber 11, the ash outlet 14 being connected to the flue chamber. 11, a first inlet 12 is arranged to introduce the flue gas into the flue chamber 11 and a first outlet 13 is arranged to exhaust the flue gas in the flue chamber 11. The ash outlet 14 is configured to discharge solid particles within the flue chamber 11 .

The second housing 2 is located in the flue chamber 11, the first housing 1 is fitted outside the second housing 2, and the first housing 1 and the second housing 2 are spaced apart. The distance between the inner wall surface of the first housing 1 and the outer wall surface of the second housing 2 is equal to or less than a predetermined value. An ash falling chamber 21 is defined by the inner wall surface of the first housing 1 and an outer wall surface of the second housing 2, and a smoke exhaust chamber 22 is defined by the inner wall surface of the second housing 2. The smoke exhaust chamber 22 is composed of: Communicating with the first inlet 12, the first outlet 13 and the ash discharge port 14, the ash drop chamber 21 communicates with the ash discharge port 14, the second housing 2 has an ash drop through hole 23 passing therethrough. is provided, and the ash drop through hole 23 communicates with the smoke exhaust chamber 22 and the ash drop chamber 21 .

In the flue 100 according to the embodiment of the present invention, the second housing 2 is provided in the flue chamber 11 so that the inner wall surface of the first housing 1 and the outer wall surface of the second housing 2 cause ash to fall. A chamber 21 is defined, a smoke exhaust chamber 22 is defined by the inner wall surface of the second housing 2 , and an ash drop through hole 23 communicates with the smoke exhaust chamber 22 and the ash drop chamber 21 . As a result, after the flue gas flows from the first inlet 12 into the flue chamber 22 (the flue chamber 11), it moves along the extending direction of the flue chamber 22 and passes through the first outlet 13. It is then discharged from the smoke exhaust chamber 22 (flue chamber 11). In the above process, some solid particles (large mass) in the flue gas move to the ash outlet 14 in the flue gas chamber 22 and are discharged from the flue 100 . Some solid particles collide with the second housing 2 in the course of flowing together with the flue gas, and enter the ash falling chamber 21 through the ash falling through hole 23 in the course of the collision.

By setting the distance between the inner wall surface of the first housing 1 and the outer wall surface of the second housing 2 to a predetermined value or less, the flow velocity of the exhausted smoke in the ash falling chamber 21 is reduced to that in the exhausted smoke chamber 22. , the solid particles that have entered the ash drop chamber 21 pass through the ash drop through hole 23 and are less likely to be carried to the first outlet 13 by the smoke in the smoke exhaust chamber 22, causing the ash to drop. Solid particles within the chamber 21 tend to move toward the ash outlet 14 and be expelled from the flue 100 . By installing the ash fall chamber 21 in the flue 100, more solid particles in the flue gas can be discharged compared to the related art where the solid particles are discharged through the flue gas only by gravity, The solid particles in the flue gas discharged from the first outlet 13 can be reduced to avoid damage to the flue gas treatment equipment in the subsequent process by the solid particles in the flue gas.

Therefore, the flue 100 according to the embodiment of the present invention has the advantage of being easy to remove the solid particles in the flue gas.

As shown in FIGS. 1-3, a flue 100 according to an embodiment of the present invention includes a first housing 1 and a second housing 2. As shown in FIG.

The first housing 1 has a flue chamber 11 , a first inlet 12 , a first outlet 13 and an ash outlet 14 communicating with the flue chamber 11 . An ash outlet 14 is provided at the bottom of the flue chamber 11 , a first inlet 12 is arranged to introduce flue gas into the flue chamber 11 and a first outlet 13 is arranged to enter the flue chamber 11 . The ash outlet 14 is configured to discharge solid particles in the flue chamber 11 , and the outside of the first housing 1 communicates with the ash outlet 14 . An ash hopper 3 is provided. Specifically, the ash hopper 3 is funnel-shaped, solid particles discharged from the ash discharge port 14 are likely to enter and be collected in the ash hopper 3, and the outlet of the ash hopper 3 communicates with the ash conveying system.

As shown in FIG. 1, in some embodiments, the first housing 1 includes a body 15, an inflow tube 16 and an outflow tube 17 communicating with the body 15, and the first inlet 12 is connected to the first located below the exit 13 of the . Specifically, the main body 15 is a vertically extending annular housing, the outlet of the inflow pipe 16 communicates with the peripheral lower portion of the main body 15, and the inlet of the inflow pipe 16 constitutes the first inlet 12. The inlet 12 of is suitable for connection with other devices (economies). The inlet of the outflow tube 17 communicates with the top of the main body 15, and the outlet of the outflow tube 17 constitutes the first outlet 13, which is suitable for connection with other devices (the denitrification reactor 4). By providing the ash outlet 14 at the bottom of the main body 15, the ash outlet 14 can easily discharge solid particles. The vertical direction is as indicated by the arrow in FIG.

The second housing 2 is located in the flue chamber 11, the first housing 1 is fitted outside the second housing 2, and the first housing 1 and the second housing 2 are spaced apart. and the distance between the inner wall surface of the first housing 1 and the outer wall surface of the second housing 2 is equal to or less than a predetermined value. An ash dropping chamber 21 is defined by the inner wall surface of the first housing 1 and an outer wall surface of the second housing 2 , and a smoke exhaust chamber 22 is defined by the inner wall surface of the second housing 2 . Specifically, the second housing 2 is a vertically extending annular housing, the body 15 is fitted outside the second housing 2 and together with the second housing 2 defines an ash drop chamber 21, i.e. A second housing 2 divides the flue chamber 11 into a smoke exhaust chamber 22 and an ash drop chamber 21 . The smoke exhaust chamber 22 communicates with the first inlet 12 , the first outlet 13 and the ash exhaust port 14 , so that the flue gas can flow into and out of the smoke exhaust chamber 22 . Solid particles can migrate to the ash outlet 14 .

The second housing 2 is provided with an ash drop through hole 23 passing therethrough, and the ash drop through hole 23 communicates with the smoke exhaust chamber 22 and the ash drop chamber 21 . As a result, when the smoke in the smoke exhaust chamber 22 collides with the second housing 2 , the solid particles in the smoke exhaust chamber 22 easily enter the ash falling chamber 21 through the ash falling through hole 23 . The ash falling chamber 21 communicates with the ash discharge port 14 , the top of the ash falling chamber 21 is closed, and the outlet of the ash falling chamber 21 is provided at the bottom of the ash falling chamber 21 and faces the ash discharge port 14 . As a result, the top of the ash falling chamber 21 does not communicate with the first outlet 13, and the exhaust smoke is less likely to pass through the top of the ash falling chamber 21 and be discharged from the ash falling chamber 21. can be further reduced, the smoke in the ash falling chamber 21 becomes less likely to flow in the direction toward the first outlet 13, the solid particles in the ash falling chamber 21 fall downward, and the ash discharge port 14 into the ash hopper 3 through the first outlet 13, thereby reducing solid particles in the flue gas discharged from the first outlet 13 and avoiding damage to the flue gas treatment equipment in subsequent processes by solid particles. be able to.

For example, the main body 15 and the second housing 2 are both vertically-extending annular housings of rectangular outer contour, the lower opening of the main body 15 defining the ash outlet 14 and the upper opening of the main body 15 defining the outflow pipe. 17 and the top between the body 15 and the second housing 2 is closed. A through hole is provided in the front lower part of the main body 15 and the second housing 2, and the through hole communicates with the smoke exhaust chamber 22 and the inlet of the inflow pipe 16, so that the smoke in the inflow pipe 16 is discharged through the through hole. can flow into the smoke exhaust chamber 22 through the . The front-rear direction is as indicated by the arrows in the figure.

In some embodiments, the distance between the first housing 1 and the second housing 2 in the medial-lateral direction is 10 cm or less. For example, the distance between the first housing 1 and the second housing 2 in the inside-outside direction is 6 cm.

In some embodiments, there are multiple ash drop through holes 23, the ash drop through holes 23 are elongated or block-shaped, and the plurality of ash drop through holes 23 are spaced apart. This makes it easier for the solid particles in the smoke exhaust chamber 22 to enter the ash falling chamber 21 through the ash falling through holes 23 . For example, the ash drop through holes 23 are elongated, and a plurality of elongated ash drop through holes 23 are provided in parallel and at intervals.

In some embodiments, the smoke evacuation chamber 22 is provided with swirling means (not shown), which swirls the flue gas flowing into the smoke evacuation chamber 22 . Specifically, the flue gas in the flue gas chamber 22 has velocity distribution characteristics of a peripheral high-speed area and a central low-speed area, and dust fly ash (solid particles) are concentrated in the periphery and in the center. Dust (solid particles) form a sparse distribution feature. In other words, in the process of swirling and ascending, the flue gas distributes most of the solid particles around the periphery of the smoke exhaust chamber 22 and increases their motion speed. Due to the action of centrifugal force, it collides with the second housing 2 (extends in the vertical direction) and is thrown down into the ash drop chamber 21 through the ash drop through hole 23 . In addition, in the low speed area of the central area of the flue gas chamber 22, the flue gas with a slow flow rate has a weak transport capacity, and more solid particles move to the ash outlet 14 and away from the flue gas chamber 22, so the flue 100 effectively improve the effect of removing solid particles in flue gas.

The swirl means includes at least one of a swirl vane and a group of deflector plates. Specifically, the swirling means may be a flue section mixer in the prior art. For example, each of the deflection devices in the flue section mixer includes a first group of deflection plates and a second group of deflection plates, and are arranged obliquely, each plate in the first group of plates is parallel to each other, each plate in the second group of plates is parallel to each other, The direction of inclination of each plate in the first group of plates is opposite to the direction of inclination of each plate in the second group of plates. The deflection device includes a first fixed rod and a second fixed rod, the end of the first fixed rod and the end of the second fixed rod are both fixed to the inner wall of the second housing 2, the first A fixing rod passes through each deflection plate in the first group of deflection plates in sequence, and a second fixing rod passes through each deflection plate in the second group of deflection plates in sequence.

Alternatively, the swirl means may be gas swirl means suitable for prior art flue gas mixer lines. By installing a plurality of swirling blades in the gas swirling means, the exhaust smoke flowing into the smoke exhaust chamber 22 is swirled. The angle of inclination of the swirl vanes is 30° or more and 60° or less.

As shown in FIG. 2, in some embodiments, the smoke exhaust chamber 22 includes a plurality of compartments 24, each compartment 24 communicating with the first inlet 12, the first outlet 13 and the ash outlet 14; The compartments 24 are arranged horizontally. The swirling means cooperates with the plurality of compartments 24 to swirl the flue gas entering the compartments 24 . As a result, the flue gas in each section 24 of the flue gas chamber 22 can be swirled, and the flue gas can be uniformly mixed to facilitate the removal of solid particles. For example, the swirling means is a flue section mixer, and each section 24 is provided with a drift device to swirl the flue gas flowing into the section 24 and mix the concentration of the flue gas components in the section. can be made uniform to facilitate denitrification.

As shown in FIG. 2, in some embodiments the plurality of compartments 24 are arranged in a first horizontal direction. Specifically, in a cross section perpendicular to the extending direction (up-down direction) of the flue, the outline of the projection of the flue 100 (body 15) is generally rectangular, and the first horizontal direction is the flue 100. It may be the longitudinal direction of the rectangular projection. As a result, the plurality of compartments 24 are arranged in the longitudinal direction of the rectangular cross-section of the flue 100, and the exhaust smoke in the compartments 24 can be easily swirled. Due to the opposite swirling directions of the smoke exhaust in two adjacent compartments 24, the smoke exhaust between adjacent compartments 24 (with no physical separation) does not mix with each other and remains relatively independent. , promotes a sustained flow of swirling air currents in the compartment 24 and can easily remove solid particles. The first horizontal direction may be the left-right direction. For example, the plurality of compartments 24 are arranged side by side in the left-right direction, and the swirling directions of exhaust smoke in two adjacent compartments 24 in the left-right direction are opposite.

In some embodiments, the projection of each section 24 is one of a square, a circle, and a regular polygon in a vertical cross-section. This facilitates the swirling of the flue gas in the compartments 24 and allows the solid particles in each compartment 24 to be easily shaken off into the ash falling chamber 21 .

In some embodiments, the ash drop through hole 23 extends spirally in the extending direction of the second housing 2 . Specifically, the second housing 2 includes a plurality of second sub-housings, and the plurality of second sub-housings are connected to form an ash drop through hole extending spirally in the extending direction of the second housing 2. A hole 23 is defined to facilitate passage of solid particles in the swirling flue gas through the ash drop through hole 23 . For example, the ash drop through hole 23 extends spirally in the vertical direction, and the spiral direction of the ash drop through hole 23 coincides with the swirling direction of exhaust smoke.

In some embodiments, the body 15 and the second housing 2 may be obliquely mounted annular housings.

In some embodiments, a plurality of partitions (not shown) are provided within the second housing 2, the partitions divide the smoke exhaust chamber 22 into a plurality of compartments 24, the thickness direction of the partitions being horizontal. Each partition plate has a partition plate chamber and a partition plate through hole, the partition plate chamber communicates with the ash discharge port 14, the partition plate through hole penetrates the partition plate, and the partition plate chamber connects with the partition plate through hole. It communicates with the smoke exhaust chamber 22 via. Due to the partition plate, the swirling exhaust smoke in the adjacent compartments 24 is less likely to affect each other, and the swirling of the exhaust smoke can be promoted. Further, the partition plate chamber communicates with the smoke exhaust chamber 22 through the partition plate through-hole, that is, the partition plate chamber communicates with the compartment 24 through the partition plate through-hole, so that exhaust smoke is introduced into the partition plate chamber and exhausted. The smoke chamber 22 can be exhausted.

The present invention further provides a generator unit, the generator unit includes an economizer, a denitrification reactor 4 and a flue 100 according to an embodiment of the present invention, the outlet of the economizer is smoke Communicating with the first inlet 12 of the channel 100, the inlet of the denitrification reactor 4 communicates with the first outlet 13 of the flue. As a result, after the flue gas flowing out of the economizer passes through the flue 100, the solid particles therein can be removed. Wear of the denitration reactor 4 can be reduced, and the service life of the denitration reactor 4 can be extended.

Therefore, the generator unit according to the embodiment of the present invention has the advantages that the flue 100 has a good effect of removing the solid particles in the flue gas, and the denitrification reactor 4 has a long service life.

In the description of the present invention, "center", "longitudinal", "lateral", "longitudinal", "width", "thickness", "top", "bottom", "front", "back", " Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial" , "circumferential," etc. are orientations or positional relationships based on the drawings, and are merely for the purpose of describing and simplifying the description of the present invention, not the device or position indicated. The invention should not be taken as limiting, as it does not imply or imply that the elements must have a particular orientation and that they will be constructed or operated in a particular orientation.

Also, the terms "first" and "second" are for descriptive purposes only and do not indicate or imply relative importance or implicitly indicate the number of technical features indicated. should not be understood as Thus, features defined by "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless there is a clear and specific limitation.

In the present invention, the terms "attachment", "connection", "connection", "fixation", etc. should be understood broadly, unless there are other clear rules and restrictions, e.g. There may be, it may be a removable connection, or it may be an integral connection. It may be a mechanical connection, it may be an electrical connection, or it may be able to communicate with each other. It may be a direct connection, an indirect connection through an intermediate medium, an internal communication between two parts, or an interaction relationship between two parts. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

In the present invention, a first feature being "above" or "below" a second feature means that the first and second features are in direct contact, unless otherwise expressly specified and limited. There may be, or the first and second features may be in indirect contact through an intermediate medium. and that a first feature is "above," "above," and "above" a second feature, even if the first feature is directly above or diagonally above the second feature. Well, or only represents that the horizontal height of the first feature is higher than the second feature. A first feature being "below", "below" and "below" a second feature may be that the first feature is directly below or diagonal to the second feature, or It only indicates that the horizontal height of the first feature is lower than the second feature.

In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" are described according to the embodiment or example. It means that the specific feature, structure, material or feature described is included in at least one embodiment or example of the present invention. Exemplary descriptions of such terms in this specification are not necessarily to the same embodiment or example. And the specific features, structures, materials or features described may be combined in any suitable manner in any one or more embodiments or examples. In addition, a person skilled in the art can combine different implementations or examples and features of different implementations or examples described herein where they are not mutually exclusive.

Although the above embodiments have been shown and described, the above embodiments are illustrative only and should not be construed as limiting the invention, and alterations, modifications, permutations and variations thereof may occur to those skilled in the art. is also within the protection scope of the present invention.

REFERENCE SIGNS LIST 100 flue 1 first housing 11 flue chamber 12 first inlet 13 first outlet 14 ash outlet 15 main body 16 inlet pipe 17 outlet pipe 2 second housing 21 ash drop chamber 22 smoke exhaust chamber 23 ash drop through hole 24 compartment 3 ash hopper 4 denitrification reactor

Claims (10)

including a first housing and a second housing;
The first housing includes a flue chamber, a first inlet, a first outlet and an ash outlet communicating with the flue chamber, the ash outlet being provided at the bottom of the flue chamber. , the first inlet configured to introduce flue gas into the flue chamber, the first outlet configured to exhaust flue gas in the flue chamber, and the ash outlet comprising: , configured to exhaust solid particles in the flue chamber;
The second housing is located in the flue chamber, the first housing is fitted outside the second housing, and the first housing and the second housing are spaced apart. and the distance between the inner wall surface of the first housing and the outer wall surface of the second housing is equal to or less than a predetermined value, and the inner wall surface of the first housing and the outer wall surface of the second housing are separated from each other. and a smoke exhaust chamber defined by an inner wall surface of the second housing, the smoke exhaust chamber communicating with the first inlet, the first outlet and the ash discharge port. , the ash drop chamber communicates with the ash discharge port, the second housing is provided with an ash drop through hole penetrating the second housing, the ash drop through hole is connected to the smoke exhaust chamber and the ash drop communicate with the chamber,
A flue characterized by: The first housing includes a main body, both the main body and the second housing are annular housings extending in a vertical direction, the main body is fitted outside the second housing, and the second housing is an annular housing. wherein the first inlet is located below the first outlet, the ash outlet is provided at the bottom of the body, and the top of the ash drop chamber is a closed, the outlet of the ash falling chamber being provided at the bottom of the ash falling chamber and facing the ash discharge port;
2. The flue according to claim 1, characterized in that: There are a plurality of said ash falling through holes, said ash falling through holes are elongated or block shaped, said plurality of said ash falling through holes are spaced apart,
Alternatively, the ash drop through hole extends spirally in the extending direction of the second housing,
2. The flue according to claim 1, characterized in that: The distance between the first housing and the second housing in the inside-outside direction is 10 cm or less,
3. The flue according to claim 2, characterized in that: A swirl means is provided in the smoke exhaust chamber, the swirl means swirls the exhaust smoke flowing into the smoke exhaust chamber, and the swirl means includes at least one of a swirl vane and a group of deflection plates.
3. The flue according to claim 2, characterized in that: Said smoke evacuation chamber comprises a plurality of compartments, each said compartment communicating with said first inlet, said first outlet and said ash discharge opening, said compartments being arranged horizontally side by side and said turning means cooperates with a plurality of said compartments to swirl flue gas entering said compartments;
6. The flue according to claim 5, characterized in that: A plurality of said compartments are arranged side by side in a first horizontal direction, and swirl directions of smoke exhaust in two adjacent said compartments are opposite.
7. A flue according to claim 6, characterized in that: In a cross section perpendicular to the vertical direction, the projection of each of the compartments is any one of a square, a circle, and a regular polygon.
8. A flue according to claim 7, characterized in that: A plurality of partition plates are provided in the second housing, the partition plates partition the smoke exhaust chamber into a plurality of the partitions, the thickness direction of the partition plates is horizontal, and each partition plate is: The partition plate chamber has a partition plate chamber and a partition plate through-hole, the partition plate chamber communicates with the ash discharge port, the partition plate through-hole penetrates the partition plate, and the partition plate chamber is connected through the partition plate through-hole. communicating with the smoke exhaust chamber;
7. A flue according to claim 6, characterized in that: economizer and
a denitrification reactor;
and a flue according to any one of claims 1 to 9,
an outlet of the economizer communicates with a first inlet of the flue, and an inlet of the denitrification reactor communicates with the first outlet of the flue;
A generator unit characterized by:

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