CN219889582U - Refuse incinerator and flue structure thereof - Google Patents

Abstract

The utility model relates to a waste incineration boiler and a flue structure thereof in the technical field of boilers, comprising a flue, a partition cold wall, a smoke window assembly and a pipe hanging device; the partition wall cold wall is hung at the lower part of the flue through the pipe hanging device, and divides the flue into a left flue and a right flue; the smoke window component comprises a partition wall middle header, a plurality of steam guide pipes and a partition wall upper header, wherein the partition wall middle header is connected with the partition wall cold wall in an inclined mode that the upper end of the partition wall middle header enters a left flue, the partition wall upper header is positioned outside the flue, the steam guide pipes are connected between the partition wall middle header and the partition wall upper header in an inclined mode opposite to the partition wall middle header, and the plurality of steam guide pipes are arranged side by side at intervals. According to the boiler flue structure provided by the embodiment, the smoke window assembly is integrally connected into the folding window structure, so that the movement trend of the high-temperature flue gas flow field is improved, the bias flow of high-temperature flue gas is reduced, and the heat exchange efficiency of the boiler is improved.

Description

Refuse incinerator and flue structure thereof

Technical Field

The utility model relates to the technical field of boilers, in particular to a garbage incineration boiler and a flue structure thereof.

Background

In order to ensure the full combustion of garbage in the garbage incinerator, a plurality of flues and smoke windows connected between the flues are arranged above a hearth, the existing structure is shown in fig. 1, wherein 1 is a vertical first flue, 2 is a vertical second flue, 3 is a partition wall water-cooled wall, 4 is a partition wall middle header, 5 is a partition wall upper header, 6 is a steam guide pipe, 8 is an out-of-furnace suspender, and 9 is a boiler roof beam. The high-temperature flue gas generated by the garbage combustion enters the vertical first flue 1, and after being turned through a smoke window, the high-temperature flue gas continuously combusts in the vertical second flue 2 and releases heat. The smoke window is generally composed of a partition middle header 4, a partition upper header 5 and a plurality of steam guide pipes 6 between the headers, smoke can pass through the intervals of the steam guide pipes 6, the load of the whole partition water-cooled wall 3 is suspended on the partition upper header 5 through the steam guide pipes 6, and the load is transferred to a boiler roof beam 9 through a furnace outer suspender 8.

In recent years, in order to obtain higher economic benefits, it is one of the main ways to increase the throughput of a single garbage incinerator. After the garbage treatment capacity is improved, the smoke quantity generated by combustion is also increased, and a great amount of smoke is turned through a smoke window, so that the smoke bias flow inevitably occurs to influence the heat exchange performance of the boiler. Meanwhile, after the width dimension of the garbage incinerator is enlarged, the load of the partition wall water-cooled wall is correspondingly improved, if the bearing capacity of the partition wall water-cooled wall is improved by reducing the interval between the steam guide pipes and increasing the number of the steam guide pipes, a large amount of dust accumulation and slag formation at the position of a steering smoke window are easily caused, the electricity consumption of a fan and the dust removal cost in the boiler are increased, and the long-term stable operation of the boiler is influenced.

According to the technical search, the utility model discloses a boiler furnace outlet smoke window structure, which comprises a header, two groups of declining diaphragm type walls, two groups of declining type furnace walls and a rigid beam assembly, wherein the header is arranged on the upper part of a furnace inner rear wall, the declining type furnace walls are respectively arranged on two sides of the furnace rear wall, the inner side walls of the declining type furnace walls are provided with declining diaphragm type walls, the outer sides of the declining diaphragm type walls are close to the two side edges of the furnace rear wall, the upper ends of the declining diaphragm type walls are communicated with the header, the outer sides of the furnace walls are provided with rigid beam assemblies, and the rigid beam assemblies are arranged in areas corresponding to the declining type furnace walls. The utility model is mainly used for a circulating fluidized bed boiler, and aims to solve the technical problems that the middle position of a smoke outlet window of the existing declining hearth is greatly worn, the separation effect of a separator is affected, and further the original emission of NOx is increased, and the heat exchange efficiency cannot be solved.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a garbage incineration boiler and a flue structure thereof.

The utility model provides a boiler flue structure, which comprises a flue, a partition cold wall, a smoke window assembly and a pipe hanging device, wherein the partition cold wall is arranged on the flue;

the partition wall cold wall is hung at the lower part of the flue through the pipe hanging device, the partition wall cold wall divides the flue into a left flue and a right flue, and the pipe hanging device is a cylindrical member;

the smoke window assembly comprises a partition wall middle header, a steam guide pipe and a partition wall upper header, wherein the partition wall middle header is connected with the partition wall cold wall in an inclined mode that the upper end of the partition wall middle header is positioned in the left flue, the partition wall upper header is positioned outside the flue, the steam guide pipe is connected between the partition wall middle header and the partition wall upper header in an inclined mode opposite to the partition wall middle header, and the steam guide pipes are arranged in parallel at intervals;

the part of the flue gas flowing upwards in the left flue flows towards the upper left through the flow guide of the partition wall middle header box which is obliquely arranged, the flue gas moving to the upper part of the partition wall middle header box flows into the right flue through the space between the vapor guide pipes which are obliquely arranged, and the vapor working medium generated by heating the partition wall cold wall sequentially passes through the partition wall middle header box and the vapor guide pipes and enters the partition wall upper header box.

In some embodiments, the connection point of the steam guide pipe and the flue is positioned at the boundary between the left flue and the right flue or above the left flue.

In some embodiments, an included angle between the header in the partition wall and the pipe hanging device is α, and a range of the included angle α is: alpha is more than or equal to 15 degrees and less than or equal to 45 degrees.

In some embodiments, the distance between the upper end of the header in the partition wall and the pipe hanging device is 500-750 mm.

In some embodiments, the pipe hanging device comprises a water-cooled pipe and a cladding body, the cladding body is wrapped outside the water-cooled pipe, the upper end of the pipe hanging device penetrates through the flue to be connected with the partition upper header, and part of steam working medium generated by the partition cold wall enters the partition upper header through the water-cooled pipe.

In some embodiments, the number of the water-cooled tubes wrapped in the wrapping body is two, and the two water-cooled tubes are connected into an H-shaped structure through fins.

In some embodiments, the pipe hanging devices are multiple groups, and the multiple groups of pipe hanging devices are arranged side by side at intervals.

In some embodiments, the steam guide pipe and the pipe hanging device are arranged in a staggered manner.

In some embodiments, the system further comprises a suspension assembly comprising a boom and a roof beam, the header on the partition being suspended from the roof beam by the boom.

The utility model also provides a garbage incineration boiler, which comprises the boiler flue structure.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the boiler flue structure provided by the embodiment, the smoke window assembly is integrally connected into the folding window structure, so that the movement trend of the high-temperature flue gas flow field is improved, the bias flow of high-temperature flue gas is reduced, and the heat exchange efficiency of the boiler is effectively improved.

2. According to the boiler flue structure provided by the embodiment, through the optimization design of the inclination parameters of the header in the partition wall and the optimization design of the inclination structure of the steam guide pipe, the influence of the smoke window assembly on the high-temperature flue gas flow field is further improved, and the heat exchange efficiency of the boiler is further improved.

3. The boiler flue structure that this embodiment provided through the optimal design to pipe hoist device structure, sets up the water-cooled tube in pipe hoist device and respectively with partition wall cold wall and partition wall upper header intercommunication, not only improves pipe hoist device's heat resistance through the circulation of working medium, forms the second passageway that the working medium circulated moreover, further promotes boiler's heat exchange efficiency.

Drawings

Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic diagram of the overall structure of the present utility model;

FIG. 3 is a schematic view of the arrangement of the steam guide pipe and the pipe hanging device of the utility model;

fig. 4 is an enlarged schematic view of the portion I in fig. 3.

Detailed Description

The present utility model will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present utility model, but are not intended to limit the utility model in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present utility model.

Example 1

The embodiment provides a boiler flue structure, as shown in fig. 1-4, which comprises a flue 1, a partition cold wall 2, a smoke window assembly 3 and a pipe hanging device 4. The flue 1 is used as a discharge channel of high-temperature flue gas of a boiler, and the partition wall cold wall 2 is vertically hung in the flue 1 through a pipe hanging device 4 with a cylindrical structure. The partition wall cold wall 2 is positioned at the lower part of the flue 1 and is positioned at the middle position, and the partition wall cold wall 2 divides the flue 1 into a left flue 11 and a right flue 12. The left flue 11 and the right flue 12 are not communicated at the position of the partition wall cold wall 2, and the space at the upper part of the partition wall cold wall 2 is a communicated space.

The smoke window assembly 3 mainly comprises a partition wall middle header 31, a steam guide pipe 32 and a partition wall upper header 33. The lower end of the partition wall middle header 31 is connected with the partition wall cold wall 2, and the upper end of the partition wall middle header 31 is located in the left flue 11, so that the partition wall middle header 31 as a whole is located in the left flue 11 in an inclined state. The steam guide pipe 32 is a linear guide pipe, the lower end of the steam guide pipe 32 is connected with the upper end of the header 31 in the partition wall, and the upper end of the steam guide pipe 32 penetrates out from the top of the flue 1 and is connected with the header 33 on the partition wall outside the flue 1. The steam guide pipe 32 connected between the header tank 31 in the partition wall and the header tank 33 on the partition wall is in an inclined state, and the inclination direction of the steam guide pipe 32 is opposite to the inclination direction of the header tank 31 in the partition wall. The number of the steam guide pipes 32 connected between the header 31 in the partition wall and the header 33 on the partition wall is plural, and the plural steam guide pipes 32 are arranged side by side at intervals. In some embodiments, the spacing between adjacent two steam guide tubes 32 is 1200-1400 mm. The cold partition wall 2, the middle partition wall header 31, the steam guide pipe 32 and the upper partition wall header 33 are connected and then communicated, namely steam working medium generated by heating in the cold partition wall 2 sequentially enters the upper partition wall header 33 through the middle partition wall header 31 and the steam guide pipe 32.

The working principle of the boiler flue structure provided by the embodiment is as follows: the high-temperature flue gas enters from the lower end of the left flue 11, the upward flowing high-temperature flue gas firstly exchanges heat with the partition wall cold wall 2, when the upward flowing high-temperature flue gas continuously reaches the height of the partition wall middle header 31, part of the high-temperature flue gas contacts with the partition wall middle header 31 to heat working media in the partition wall middle header 31 through heat exchange, on the other hand, the partition wall middle header 31 arranged obliquely changes part of the high-temperature flue gas from upward flowing to upward left flowing, and then the upward flowing high-temperature flue gas is enabled to be integrally offset leftwards under the action of flue gas fluid flowing from the left upper side of the side surface and integrally has a trend of upward left movement. The high-temperature flue gas which is wholly deflected leftwards continuously moves to contact with the shell at the upper part of the left flue 11 and then flows towards the plurality of steam guide pipes 32 which are arranged at intervals side by side, and because the high-temperature flue gas which is wholly deflected leftwards has a trend of moving leftwards before colliding with the inner wall of the left flue 11, the high-temperature flue gas which is deflected and flows to the position of the steam guide pipe 32 has a certain inclined downward movement trend, and the steam guide pipes 32 which are reversely inclined relative to the header 31 in the partition wall enable the high-temperature flue gas which is contacted with and shunted to further increase the downward movement trend, and then enters the right flue 12 after passing through the pipe hanging device 4. Under the action of downward movement trend of the high-temperature flue gas entering the right flue 12, the energy consumption caused by the overall left movement of the high-temperature flue gas in the left flue 11 is increased, so that the high-temperature flue gas entering the right flue 12 is closer to the partition wall cold wall 2, and the heat absorption rate of the high-temperature flue gas is improved. Therefore, in the boiler flue structure provided by the embodiment, the smoke window assembly is integrally connected into the folding window structure, so that the movement trend of the high-temperature flue gas flow field is improved, the bias flow of high-temperature flue gas is reduced, and the heat exchange efficiency of the boiler is effectively improved.

Example 2

The embodiment 2 is formed on the basis of the embodiment 1, and the influence of the smoke window assembly on the high-temperature smoke flow field is further improved through the optimal design of the inclination parameters of the header in the partition wall and the optimal design of the inclination structure of the steam guide pipe, so that the heat exchange efficiency of the boiler is further improved. Specifically:

as shown in fig. 1 to 4, the partition wall intermediate header tank 31 is disposed obliquely toward the left flue 11 with an angle of inclination α, where the angle of inclination α is the angle between the partition wall intermediate header tank 31 and the pipe hanging device 4 in the erected state. The angle α between the intermediate header 31 of the partition wall and the pipe hanging device 4 is in the range of 15 ° to 45 °, and particularly preferably, the angle α is 30 °. When the included angle α is smaller than 15 °, the high-temperature flue gas guided by the header 31 in the partition wall is less due to the excessively small inclination angle, and the effect of moving the high-temperature flue gas to the left as a whole is poor. When the included angle α is greater than 45 °, the bending angle of the header 31 in the partition wall is too large, so that the flow direction of the high-temperature flue gas guided by the header 31 in the partition wall has a downward flow trend, and the turbulence of the air flow is easy to generate, which results in that the preset purpose cannot be achieved. In some embodiments, the distance between the upper end of the partition wall, where the header 31 is connected to the steam guide pipe 32, and the pipe hanging device 4 is 500-750 mm. In this range, the amount of high-temperature flue gas whose flow direction is changed by the header 31 in the partition wall can be made moderate, and the effect of driving the high-temperature flue gas to deviate leftwards as a whole and to have a leftwards upward flow tendency as a whole is good.

The upper end of the steam guide pipe 32 passes through the flue 1 and is located at most on the boundary line between the left flue 11 and the right flue 12, and the boundary line between the left flue 11 and the right flue 12 refers to the space boundary line between the vertical upper side of the partition wall cold wall 2 and the flue 1, that is, between the left flue 11 and the right flue 12. The steam guide pipe 32 does not enter the space above the right flue 12 when passing through the flue 1 at the connection point of the steam guide pipe 32, so that the high-temperature flue gas is split through the steam guide pipe 32 before entering the right flue 12, on one hand, the high-temperature flue gas entering the right flue 12 has a downward movement trend, and on the other hand, the kinetic energy of the high-temperature flue gas entering the right flue 12 is further reduced, so that the high-temperature flue gas in the right flue 12 is closer to the partition wall cold wall 2.

Example 3

The embodiment 3 is formed on the basis of the embodiment 1 or the embodiment 2, and through the optimized design of the structure of the pipe hanging device, the water cooling pipe is arranged in the pipe hanging device and is respectively communicated with the partition wall cold wall and the partition wall upper header, so that the heat resistance of the pipe hanging device is improved through the circulation of working medium, a second passage through which the working medium circulates is formed, and the heat exchange efficiency of the boiler is further improved. Specifically:

as shown in fig. 1 to 4, the pipe hanging device 4 is mainly composed of a water-cooled pipe 41 and a coating body 42 which is coated outside the water-cooled pipe 41. In some embodiments, the coating 42 is a refractory material and is cast around the water-cooled tube 41. One end of the pipe hanging device 4 is connected and communicated with the partition cold wall 2, and the other end of the pipe hanging device 4 extends out of the flue 1 and is connected and communicated with the partition header 33. In the working process, working medium water in the partition wall cold wall 2 is heated to form water vapor, one path of the water vapor reaches the partition wall upper header 33 through the partition wall middle header 31 and the steam guide pipe 32, and the other path of the water vapor reaches the partition wall upper header 33 through the water cooling pipe 41. The heat of the cladding body 42 can be effectively taken away by the circulating flow of the working medium in the water cooling pipe 41, the heat resistance of the pipe hanging device 4 can be effectively improved, the structural strength is ensured, the circulating efficiency of the working medium in the partition wall cold wall 2 can be effectively improved, and the heat exchange efficiency of a boiler is further improved.

In some embodiments, the number of the water-cooling tubes 41 covered in the cover 42 is two, and the two water-cooling tubes 41 are connected into an H-shaped structure through the fins 43. After the cladding body 42 wraps the two water cooling pipes 41 with the H-shaped structure, the heat resistance of the pipe hanging device 4 is further improved by increasing the flow quantity of working media, and meanwhile, the heat exchange efficiency of the boiler is improved.

In some embodiments, the pipe hanging devices 4 are multiple groups, and the multiple groups of pipe hanging devices 4 are arranged side by side at intervals. Further, the distance between the adjacent pipe hanging devices 4 is 1200-1400 mm. In particular, the spacing between adjacent tube hangers 4 is the same as the spacing between adjacent steam guide tubes 32. Preferably, the steam guide pipes 32 and the pipe hanging devices 4 are arranged in a staggered manner, for example, each pipe hanging device 4 is located between two adjacent steam guide pipes 32, so that the high-temperature flue gas fluid between the steam guide pipes 32 is split again by the pipe hanging devices 4 when flowing to the right flue 12, disturbance in the high-temperature flue gas is enhanced, the phenomenon of bias flow of the flue gas caused by direct current is reduced, and the heat exchange efficiency of the boiler is further improved.

In some embodiments, the upper end of the pipe hanging device 4 is connected and communicated with the partition wall header 33, and further comprises a hanging assembly 5 for hanging the partition wall header 33. The suspension assembly 5 mainly comprises a suspension rod 51 and a top plate beam 52, wherein the top plate beam 52 is used for being fixedly connected with a corresponding structure of a boiler, one end of the suspension rod 51 is connected with the top plate beam 52, and the other end of the suspension rod is connected with the partition wall header 33, so that the partition wall header 33 is in a suspended state. The boom 51 may be provided in one piece or in a plurality of pieces arranged side by side.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", 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 devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The foregoing describes specific embodiments of the present utility model. It is to be understood that the utility model is not limited to the particular embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without affecting the spirit of the utility model. The embodiments of the utility model and the features of the embodiments may be combined with each other arbitrarily without conflict.

Claims (10)

1. The boiler flue structure is characterized by comprising a flue (1), a partition cold wall (2), a smoke window assembly (3) and a pipe hanging device (4);

the partition wall cold wall (2) is hung at the lower part of the flue (1) through the pipe hanging device (4), the partition wall cold wall (2) divides the flue (1) into a left flue (11) and a right flue (12), and the pipe hanging device (4) is a cylindrical member;

the smoke window assembly (3) comprises a partition wall middle header (31), a steam guide pipe (32) and a partition wall upper header (33), wherein the partition wall middle header (31) is connected with the partition wall cold wall (2) in an inclined mode that the upper end of the partition wall middle header is positioned at the left flue (1), the partition wall upper header (33) is positioned outside the flue (1), the steam guide pipe (32) is connected between the partition wall middle header (31) and the partition wall upper header (33) in an inclined mode opposite to the partition wall middle header (31), the steam guide pipes (32) are multiple, and the steam guide pipes (32) are arranged at intervals side by side;

the part of flue gas flowing upwards in the left flue (11) flows upwards left through the water conservancy diversion of the header (31) in the partition wall that the slope set up, moves to flue gas above the header (31) in the partition wall flows into right flue (12) through the space between vapor guide pipe (32) that the slope set up, the cold wall (2) of partition wall is heated the steam working medium that produces loops through header (31) in the partition wall vapor guide pipe (32) get into in header (33) on the partition wall.

2. The boiler flue structure according to claim 1, wherein the connection point of the steam duct (32) with the flue (1) is located at the boundary of the left flue (11) and the right flue (12) or above the left flue (11).

3. A boiler flue structure according to claim 1, characterized in that the included angle between the header (31) in the partition wall and the pipe hanging device (4) is α, the range of included angle α being: alpha is more than or equal to 15 degrees and less than or equal to 45 degrees.

4. A boiler flue structure according to claim 3, characterized in that the distance between the upper end of the header (31) in the partition wall and the tube hanging means (4) is 500-750 mm.

5. A boiler flue structure according to any one of claims 1-4, wherein the pipe hanging device (4) comprises a water cooling pipe (41) and a cladding body (42), the cladding body (42) is wrapped outside the water cooling pipe (41), the upper end of the pipe hanging device (4) penetrates through the flue (1) to be connected with the partition upper header (33), and part of steam working medium generated by the partition cold wall (2) enters the partition upper header (33) through the water cooling pipe (41).

6. The boiler flue structure according to claim 5, wherein the number of the water cooling pipes (41) wrapped in the wrapping body (42) is two, and the two water cooling pipes (41) are connected into an H-shaped structure through fins (43).

7. A boiler flue structure according to claim 5, wherein the tube hanging devices (4) are arranged in a plurality of groups, and the tube hanging devices (4) are arranged in a side-by-side and spaced manner.

8. A boiler flue structure according to claim 6 or 7, characterized in that the steam guide pipes (32) are arranged in a staggered manner with respect to the pipe hanging device (4).

9. A boiler flue structure according to claim 8, further comprising a suspension assembly (5), said suspension assembly (5) comprising a boom (51) and a roof beam (52), said header on partition (33) being suspended from said roof beam (52) by said boom (51).

10. A waste incineration boiler, characterized by comprising a boiler flue structure according to any one of claims 1-9.