Top sealing structure device of horizontal flue superheater

Abstract

The utility model relates to a waste incineration waste heat boiler, and aims to provide a horizontal flue superheater top sealing structure device which can effectively solve the problem of smoke leakage at the top sealing position of a superheater and is simple in structure, good in sealing performance and light in weight. According to the technical scheme, the top sealing structure device of the horizontal flue superheater comprises a horizontal flue, a horizontal flue water cooling wall and the superheater, wherein the horizontal flue is provided with a flue gas circulation channel and a horizontal flue collection box, the horizontal flue water cooling wall is located on the wall portion of the horizontal flue, and the superheater is located in the flue gas circulation channel. The superheater upwards penetrates through the water cooling wall of the horizontal flue and then is communicated with the steam pocket to form a loop or output superheated steam outwards; the horizontal flue is characterized in that the front side, the rear side and the ceiling of the horizontal flue water-cooled wall are all membrane water-cooled walls comprising pipelines and flat steel; wherein a plurality of sealing boxes are arranged on the ceiling membrane type water cooling wall, and the superheater upwards penetrates through the ceiling membrane type water cooling wall through the sealing boxes.

Description

Technical Field

[0001] The utility model relates to a waste incineration waste heat boiler, in particular to a top sealing structure device of a horizontal flue superheater. Background Art

[0002] In the existing horizontal waste incineration waste heat boiler, the superheater is generally arranged in the horizontal flue and supported above the horizontal flue through a frame, and the inside of the frame is sealed with refractory castable and thermal insulation materials. However, after the waste heat boiler with this structure is put into operation, smoke leakage at the sealing part of the top of some superheaters is likely to occur. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the above background art and provide a top sealing structure device of a horizontal flue superheater, which should be able to effectively solve the problem of smoke leakage at the top sealing part of the superheater, and has a simple structure, good sealing performance and light weight.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A top sealing structure device of a horizontal flue superheater includes a horizontal flue having a flue gas circulation passage and provided with a horizontal flue header, a horizontal flue water wall located on the wall of the horizontal flue, and a superheater located in the flue gas circulation passage; the superheater passes upward through the horizontal flue water wall and then communicates with a steam drum to form a loop or outputs superheated steam outward; its characteristics are: the front side, the rear side and the ceiling in the horizontal flue water wall are all membrane water walls including pipes and flat steels; a plurality of sealing boxes are installed on the ceiling membrane water wall, and the superheater passes upward through the ceiling membrane water wall through the sealing boxes.

[0006] The ceiling membrane water wall includes a fourth ceiling membrane water wall, a third ceiling membrane water wall, a second ceiling membrane water wall and a first ceiling membrane water wall which are arranged in sequence along the flue gas circulation direction and are connected in series through a water wall header; it also includes a third ceiling membrane water wall outlet header connecting the third ceiling membrane water wall and the fourth ceiling membrane water wall, a second ceiling membrane water wall outlet header connecting the second ceiling membrane water wall and the third ceiling membrane water wall, a first ceiling membrane water wall outlet header connecting the first ceiling membrane water wall and the second ceiling membrane water wall, a first ceiling membrane water wall inlet header connecting the other end of the first ceiling membrane water wall, and a fourth ceiling membrane water wall outlet header connecting the other end of the fourth ceiling membrane water wall.

[0007] The superheater includes a fourth superheater, a third superheater, a second superheater, and a first superheater that are arranged in sequence along the flue gas flow direction and connected in series; adjacent superheaters pass upward through the overhead membrane water wall and then are connected through connecting pipes; the steam inlet of the superheater is connected to the steam drum through a first connecting pipe.

[0008] The horizontal flue header includes a front water wall header of the horizontal flue, a rear header of the horizontal flue, and a connecting header.

[0009] The front water wall header of the horizontal flue includes an upper header of the front water wall and a lower header of the front water wall; the rear water wall header of the horizontal flue includes an upper header of the rear water wall and a lower header of the rear water wall; the connecting header includes a first connecting header, a second connecting header, a third connecting header, and a fourth connecting header that are connected in parallel and connect the lower header of the front water wall of the horizontal flue and the lower header of the rear water wall of the horizontal flue.

[0010] The inlet header of the first overhead membrane water wall is connected to the connecting header through a vertical connecting pipe; the inlet header of the second overhead membrane water wall is connected to the connecting header through a vertical connecting pipe; the inlet header of the fourth overhead membrane water wall is connected to the connecting header through a vertical connecting pipe, and the outlet header of the fifth overhead membrane water wall is connected to the connecting header through a vertical connecting pipe;

[0011] The inlet header of the second overhead membrane water wall and the outlet header of the first overhead membrane water wall are the same header; the inlet header of the fourth overhead membrane water wall and the outlet header of the third overhead membrane water wall are the same header.

[0012] The inlet header of the first overhead membrane water wall, the inlet header of the second overhead membrane water wall, and the inlet header of the fourth overhead membrane water wall are not connected to the upper header of the front water wall of the horizontal flue and the upper header of the rear water wall of the horizontal flue; the inlet header of the third overhead membrane water wall and the outlet header of the fourth overhead membrane water wall are connected to the upper header of the front water wall of the horizontal flue and the upper header of the rear water wall of the horizontal flue;

[0013] The inlet header of the third overhead membrane water wall and the outlet header of the second overhead membrane water wall are the same header, the upper header of the rear water wall of the horizontal flue and the upper header of the front water wall are the same header, and the upper header of the front water wall of the horizontal flue and the upper header of the rear water wall are the same header.

[0014] The superheater is a serpentine tube superheater.

[0015] A plurality of ash hoppers are provided at the bottom of the horizontal flue, and these ash hoppers are arranged in sequence along the length direction of the flue.

[0016] The beneficial effects of the present utility model are as follows: Compared with the prior art, a top sealing structure device for a horizontal flue superheater provided by the present utility model; by designing the top of the horizontal flue where the superheater is arranged as a membrane water wall, the use of refractory castable is greatly reduced, the weight is light, and the installation is more convenient with good sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view structural schematic diagram of an embodiment of the present utility model.

[0018] Figure 2 It is a top view structural schematic diagram of an embodiment of the present utility model.

[0019] Reference numerals: The first ceiling membrane water wall 1-1, the second ceiling membrane water wall 1-2, the third ceiling membrane water wall 1-3, and the fourth ceiling membrane water wall 1-4,

[0020] The inlet header 2-1 of the first ceiling membrane water wall, the outlet header 2-2 of the first ceiling membrane water wall (the inlet header of the second ceiling membrane water wall), the outlet header 2-3 of the second ceiling membrane water wall (the inlet header of the third ceiling membrane water wall), the outlet header 2-4 of the third ceiling membrane water wall (the inlet header of the fourth ceiling membrane water wall), the outlet header 2-5 of the fourth ceiling membrane water wall, the outlet header 2-6 of the fifth ceiling membrane water wall; the upper header 2-7 of the rear water wall, the upper header 2-8 of the front water wall, the lower header 2-9 of the rear water wall, the lower header 2-10 of the front water wall, the first connecting header 2-11, the second connecting header 2-12, the third connecting header 2-13, the fourth connecting header 2-14,

[0021] The evaporator 3, the superheater 4, the first superheater 4-1, the second superheater 4-2, the third superheater 4-3, the fourth superheater 4-4, the superheater outlet 4-5,

[0022] The steam drum 5, the first connecting pipe 5-1, the second connecting pipe 5-2, the third connecting pipe 5-3,

[0023] The ash hopper 6, the sealing box 7, the connecting pipe 8, the vertical connecting pipe 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following further describes the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model.

[0025] The top sealing structure device of the horizontal flue superheater shown in the drawings includes a horizontal flue equipped with a horizontal flue header, a horizontal flue water wall arranged at the top of the horizontal flue, an evaporator 3 and a superheater 4 arranged in the inner cavity of the horizontal flue, an ash hopper 6 arranged at the bottom of the horizontal flue, and a steam drum 5.

[0026] On both sides of the horizontal flue ( Figure 1 the left and right sides of Figure 1 ), a flue gas inlet and a flue gas outlet are respectively provided; water-cooled walls are arranged on the front side, rear side and ceiling of the horizontal flue. A number of ash hoppers 6 are sequentially installed along the length direction of the horizontal flue at the lower part of the horizontal flue to seal the lower end of the horizontal flue, thereby forming a flue gas circulation channel; an evaporator and a number of superheaters 4 are installed in the inner cavity of the horizontal flue, and adjacent superheaters pass upward through the ceiling water-cooled wall and are connected through a connecting pipe 8; all of these are similar to the existing sealing structure device at the top of the horizontal flue superheater.

[0027] The improvement of the present utility model is: the steam drum 5 is connected to the inlet of the water-cooled wall of the horizontal flue and the inlet of the evaporator 3 through a third connecting pipe 5-3; the steam drum 5 is connected to the outlet of the evaporator 3 and the outlet of the water-cooled wall of the horizontal flue through a second connecting pipe 5-2; the steam outlet of the steam drum is connected to the steam inlet of the superheater through a first connecting pipe 5-1; the superheated steam outlet 4-5 of the superheater is led out to the cooperating equipment through a connecting pipe.

[0028] Further, the water-cooled wall of the horizontal flue is a membrane water-cooled wall (prior art) composed of pipes and flat steel. Since heat-insulating materials are used instead of refractory castables, the thickness and weight of the flue wall are greatly reduced.

[0029] Further, the ceiling membrane water-cooled wall includes a first ceiling membrane water-cooled wall 1-1, a second ceiling membrane water-cooled wall 1-2, a third ceiling membrane water-cooled wall 1-3 and a fourth ceiling membrane water-cooled wall 1-4 that are sequentially horizontally laid and connected in series; it also includes a ceiling water-cooled wall header, that is, a third ceiling membrane water-cooled wall outlet header 2-4 connecting the third ceiling membrane water-cooled wall and the fourth ceiling membrane water-cooled wall, a second ceiling membrane water-cooled wall outlet header 2-3 connecting the second ceiling membrane water-cooled wall and the third ceiling membrane water-cooled wall, a first ceiling membrane water-cooled wall outlet header 2-2 connecting the first ceiling membrane water-cooled wall and the second ceiling membrane water-cooled wall, a first ceiling membrane water-cooled wall inlet header 2-1 connecting the other end of the first ceiling membrane water-cooled wall, and a fourth ceiling membrane water-cooled wall outlet header 2-5 connecting the other end of the fourth ceiling membrane water-cooled wall; the ceiling membrane water-cooled wall can facilitate the flexible arrangement of the superheater.

[0030] Further, the superheater includes a fourth superheater 4-4, a third superheater 4-3, a second superheater 4-2 and a first superheater 4-1 that are arranged in sequence along the flue gas flow direction and connected in series.

[0031] Further, a sealing box 7 (prior art) is installed at the place where the superheater passes upward through the ceiling membrane water-cooled wall.

[0032] Further, the sealing box 7 includes a metal expansion joint and a comb-shaped steel plate, which can greatly reduce the use of refractory castable and reduce the weight of the entire structure.

[0033] Further, the horizontal flue header includes a front water-cooled wall header of the horizontal flue, a rear header of the horizontal flue, and a connecting header.

[0034] Further, the front water-cooled wall header of the horizontal flue includes an upper header 2-8 of the front water-cooled wall and a lower header 2-10 of the front water-cooled wall; the rear water-cooled wall header of the horizontal flue includes an upper header 2-7 of the rear water-cooled wall and a lower header 2-9 of the rear water-cooled wall; the connecting header includes a first connecting header 2-11, a second connecting header 2-12, a third connecting header 2-13, and a fourth connecting header 2-14 that are connected in parallel and communicate with the lower header 2-10 of the front water-cooled wall of the horizontal flue and the lower header 2-9 of the rear water-cooled wall of the horizontal flue.

[0035] Further, the ceiling water-cooled wall header includes a first ceiling membrane water-cooled wall inlet header 2-1, a first ceiling membrane water-cooled wall outlet header 2-2 (which also serves as the second ceiling membrane water-cooled wall inlet header), a second ceiling membrane water-cooled wall outlet header 2-3 (which also serves as the third ceiling membrane water-cooled wall inlet header), a third ceiling membrane water-cooled wall outlet header 2-4 (which also serves as the fourth ceiling membrane water-cooled wall inlet header), a fourth ceiling membrane water-cooled wall outlet header 2-5 (which also serves as the fifth ceiling membrane water-cooled wall inlet header), and a fifth ceiling membrane water-cooled wall outlet header 2-6 that are sequentially connected through each ceiling membrane water-cooled wall. Among them: the first ceiling membrane water-cooled wall inlet header 2-1 communicates with one end of the first ceiling membrane water-cooled wall 1-1, the first ceiling membrane water-cooled wall outlet header 2-2 communicates with the other end of the first ceiling membrane water-cooled wall and one end of the second ceiling membrane water-cooled wall 1-2, the second ceiling membrane water-cooled wall outlet header 2-3 communicates with the other end of the second ceiling membrane water-cooled wall and one end of the third ceiling membrane water-cooled wall 1-3, the third ceiling membrane water-cooled wall outlet header 2-4 communicates with the other end of the third ceiling membrane water-cooled wall and one end of the fourth ceiling membrane water-cooled wall 1-4, and the fourth ceiling membrane water-cooled wall outlet header 2-5 communicates with the other end of the fourth ceiling membrane water-cooled wall.

[0036] Further, in the above-mentioned top sealing structure device of a horizontal flue gas superheater, the inlet header 2-1 of the first roof membrane water wall is communicated with the connecting header 2-11 through a vertical connecting pipe 9; the inlet header of the second roof membrane water wall is communicated with the connecting header 2-12 through a vertical connecting pipe; the inlet header of the fourth roof membrane water wall is communicated with the connecting header 2-13 through a vertical connecting pipe, and the outlet header 2-6 of the fifth roof membrane water wall is communicated with the connecting header 2-14 through a vertical connecting pipe. The inlet header 2-1 of the first roof membrane water wall, the inlet header of the second roof membrane water wall, and the inlet header of the fourth roof membrane water wall are not communicated with the upper header of the front side water wall of the horizontal flue and the upper header of the rear side water wall of the horizontal flue; the inlet header of the third roof membrane water wall and the outlet header 2-5 of the fourth roof membrane water wall are both communicated with the upper header of the front side water wall of the horizontal flue and the upper header of the rear side water wall of the horizontal flue.

[0037] Further, in the above-mentioned top sealing structure device of a horizontal flue gas superheater, the superheater includes a first superheater 4-1, a second superheater 4-2, a third superheater 4-3, and a fourth superheater 4-4 that are sequentially communicated through a connecting pipe 8.

[0038] Further, in the above-mentioned top sealing structure device of a horizontal flue gas superheater, the superheater is of a serpentine tube type (prior art), and is provided with multiple rows of serpentine tubes to improve the heat exchange effect.

[0039] Further, in the above-mentioned top sealing structure device of a horizontal flue gas superheater, the ash hopper 6 is a V-shaped ash hopper (prior art), and its top is fixed on the lower headers of the front and rear sides of the horizontal flue and the connecting header.

[0040] Further, in the above-mentioned top sealing structure device of a horizontal flue gas superheater, the ash hopper 6 is made of steel plate to ensure the service life of the flue gas ash hopper.

[0041] Further, the place where the evaporator 3 passes through the roof is a comb-shaped plate sealing structure (prior art).

[0042] The top sealing structure device of the horizontal flue gas superheater disclosed in the embodiment of the present invention; uses modular water walls to replace a large amount of refractory castables, is lighter in weight and has better sealing performance.

[0043] The working principle of the present invention is:

[0044] High-temperature flue gas enters from the left inlet of the horizontal flue, is heated by the evaporator and several superheaters in sequence, and then is output from the right outlet of the horizontal flue; and then is discharged into the atmosphere after treatment.

[0045] The water in the steam drum 5 is input into the header of the horizontal flue and the evaporator 3 through the third connecting pipe 5-3, and after being heated, it is then returned to the steam drum through the second connecting pipe 5-2 to form a circulation loop; while the steam in the steam drum is transported to the steam inlet of the superheater 4 through the first connecting pipe 5-1, and after being reheated by the superheater, it is output through the connecting pipe from the steam outlet 4-5 of the superheater to lead out the superheated steam to the equipment used in cooperation.

Claims

1. A top sealing structure device for a horizontal flue superheater, comprising a horizontal flue having a flue gas circulation passage and provided with a horizontal flue header, a horizontal flue water wall located at the wall portion of the horizontal flue, and a superheater (4) located in the flue gas circulation passage; the superheater passes upward through the horizontal flue water wall and then communicates with a steam drum (5) to form a loop or outputs superheated steam outward; characterized in that: The front side, rear side and ceiling in the horizontal flue water wall are all membrane water walls including pipes and flat steels; several seal boxes (7) are installed on the ceiling membrane water wall, and the superheater passes upward through the ceiling membrane water wall through the seal boxes. The ceiling membrane water wall includes a fourth ceiling membrane water wall (1-4), a third ceiling membrane water wall (1-3), a second ceiling membrane water wall (1-2) and a first ceiling membrane water wall (1-1) which are arranged in sequence along the flue gas flow direction and are connected in series through a water wall header; it also includes a third ceiling membrane water wall outlet header (2-4) connecting the third ceiling membrane water wall and the fourth ceiling membrane water wall, a second ceiling membrane water wall outlet header (2-3) connecting the second ceiling membrane water wall and the third ceiling membrane water wall, a first ceiling membrane water wall outlet header (2-2) connecting the first ceiling membrane water wall and the second ceiling membrane water wall, a first ceiling membrane water wall inlet header (2-1) connecting the other end of the first ceiling membrane water wall, and a fourth ceiling membrane water wall outlet header (2-5) connecting the other end of the fourth ceiling membrane water wall.

2. The top sealing structure device of the horizontal flue superheater according to claim 1, characterized in that: The superheater includes a fourth superheater (4-4), a third superheater (4-3), a second superheater (4-2) and a first superheater (4-1) which are arranged in sequence along the flue gas flow direction and are connected in series; adjacent superheaters pass upward through the ceiling membrane water wall and then are connected through connecting pipes (8) respectively; the steam inlet of the superheater is connected to the steam drum through a first connecting pipe (5-1).

3. The top sealing structure device of the horizontal flue superheater according to claim 2, characterized in that: The horizontal flue header includes a horizontal flue front side water wall header, a horizontal flue rear side header and a connecting header. The horizontal flue front side water wall header includes a front side water wall upper header (2-8) and a front side water wall lower header (2-10); the horizontal flue rear side water wall header includes a rear side water wall upper header (2-7) and a rear side water wall lower header (2-9); the connecting header includes a first connecting header (2-11), a second connecting header (2-12), a third connecting header (2-13) and a fourth connecting header (2-14) which are connected in parallel and connect the horizontal flue front side water wall lower header (2-10) and the horizontal flue rear side water wall lower header 2-9.

4. The top seal structure device of the horizontal flue superheater according to claim 3, characterized in that: The first ceiling membrane water wall inlet header (2-1) is connected to the first connecting header (2-11) through a vertical connecting pipe (9); the second ceiling membrane water wall inlet header is connected to the second connecting header (2-12) through a vertical connecting pipe; the fourth ceiling membrane water wall inlet header is connected to the third connecting header (2-13) through a vertical connecting pipe, and the fifth ceiling membrane water wall outlet header (2-6) is connected to the fourth connecting header (2-14) through a vertical connecting pipe. The second ceiling membrane water wall inlet header and the first ceiling membrane water wall outlet header are the same header; the fourth ceiling membrane water wall inlet header and the third ceiling membrane water wall outlet header are the same header.

5. The top sealing structure device of the horizontal flue superheater according to claim 4, characterized in that: The inlet headers (2-1) of the first roof membrane water wall, the inlet headers of the second roof membrane water wall, and the inlet headers of the fourth roof membrane water wall are not connected to the upper headers of the front water wall of the horizontal flue and the upper headers of the rear water wall of the horizontal flue; the inlet headers of the third roof membrane water wall and the outlet headers (2-5) of the fourth roof membrane water wall are both connected to the upper headers of the front water wall of the horizontal flue and the upper headers of the rear water wall of the horizontal flue; The inlet header of the third roof membrane water wall and the outlet header of the second roof membrane water wall are the same header, the upper header of the rear water wall of the horizontal flue and the upper header of the front water wall of the horizontal flue are the same header, and the upper header of the front water wall of the horizontal flue and the upper header of the rear water wall of the horizontal flue are the same header.

6. The top sealing structure device of the horizontal flue superheater according to claim 5, characterized in that: The superheater is a serpentine superheater.

7. The top sealing structure device of the horizontal flue superheater according to claim 6, characterized in that: A plurality of ash hoppers (6) are arranged at the bottom of the horizontal flue, and these ash hoppers are arranged in sequence along the length direction of the horizontal flue.

Images