CN214039673U - Heated fin module and waste heat boiler thereof - Google Patents

Abstract

The utility model discloses a heated fin module and exhaust-heat boiler thereof. Heated fin module, including entry header, export header and connection a plurality of finned tubes of entry header and export header still include: at least one working opening provided on the inlet header and/or the outlet header; the inlet header and the outlet header each include one side connected to the finned tubes and another side remote from the finned tubes, the working openings being located on the other side on the inlet header and/or the outlet header; and when the joint of the inlet header and/or the outlet header and any finned tube leaks, a space is provided for plugging the finned tube which leaks through the working opening, and the at least one pipe body plug is used for plugging the finned tube. The utility model provides a problem that the exhaust-heat boiler finned tube can't handle the leakage.

Description

Heated fin module and waste heat boiler thereof

Technical Field

The utility model relates to a flue gas waste heat recovery utilizes the field, especially relates to a heated fin module and exhaust-heat boiler thereof.

Background

Waste heat boilers, also called Heat Recovery Steam Generators (HRSGs), are mainly applied in the fields of chemical industry, electric power, ships, oil platforms, etc., and can generate steam by using waste heat. The waste heat boiler has no combustion chamber and fuel system of the conventional coal-fired boiler, no air supply and smoke exhaust fan system, only finned tubes and steam/water collecting headers which are arranged densely, steam drums, pipelines, valves and the like.

The heating surface of the waste heat boiler adopts a standard unit module structure, a heating fin module is composed of vertically arranged staggered spiral finned tubes, an upper header and a lower header, and the sizes of the heating fin modules on all levels of heating surfaces are basically similar. The heated fin modules consist of a top and bottom header with one, two or three rows of tubes between the headers. The inlet header or the outlet header may be a top header or a bottom header. The heated fin modules are positioned opposite each other so that the flow of flue gas outside the finned tubes is prevented from being short-circuited. The finned tubes are put together without close passages therebetween.

When fuel natural gas designed by the waste heat boiler does not contain sulfur and the like and generates corrosive tail gas after combustion, hidden troubles of corrosion and leakage do not exist in the use process of the waste heat boiler heating surface module finned tubes, generally, the module finned tubes do not need to be overhauled during the design service life, and therefore, an overhauling space is not designed to be reserved in the waste heat boiler heating surface module. However, for some possible reasons, once the finned tube of the heating surface module of the waste heat boiler leaks during use, leakage points cannot be processed due to the fact that no maintenance space is designed, working media in the heating surface module rapidly run off due to the existence of the leakage points, the safe operation of a unit can be threatened, and great economic loss can be caused, and even the unit can be shut down and cannot operate in severe cases.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a heated fin module and exhaust-heat boiler thereof effectively solves the problem that the exhaust-heat boiler finned tube can't handle the leakage.

In one aspect, the utility model provides a heated fin module, including entry header, export header and connection a plurality of finned tubes of entry header and export header still include: at least one working opening provided on the inlet header and/or the outlet header; the inlet header and the outlet header each include one side connected to the finned tubes and another side remote from the finned tubes, the working openings being located on the other side on the inlet header and/or the outlet header; and when the joint of the inlet header and/or the outlet header and any finned tube leaks, a space is provided for plugging the finned tube which leaks through the working opening, and the at least one pipe body plug is used for plugging the finned tube.

The technical effect achieved after the technical scheme is adopted is as follows: the working opening is convenient for extending hands into the inner cavities of the inlet header and the outlet header, and leakage plugging operation is carried out on the finned tubes through the tube body plugs.

In an embodiment of the present invention, the present invention further includes: and the hand hole plug is welded in the working opening.

The technical effect achieved after the technical scheme is adopted is as follows: the hand hole plug is used for stopping leakage repairing work, and the heated fin module can be reused after the working opening is plugged.

In one embodiment of the present invention, the working opening is a circular hole with a diameter of 110mm, and the outer diameter of the hand hole plug is 108 mm.

The technical effect achieved after the technical scheme is adopted is as follows: the working opening is too large, so that the working opening is inconvenient to cut and seal, the finned tube is inconvenient to seal when the working opening is too small, the hole is convenient to open when the diameter is 110mm, and enough sealing operation space is provided; when the outer diameter of the hand hole plug is 108mm, a welding gap is reserved between the hand hole plug and the working opening, so that the working opening and the hand hole plug can be better fused during welding.

In an embodiment of the present invention, the hand hole plug is a tubular structure, one end of the hand hole plug is provided with a plug opening, and the other end of the hand hole plug is a closed surface.

The technical effect achieved after the technical scheme is adopted is as follows: after the primary plugging process is completely finished, the sealing surface can prevent working media in the heated fin module from flowing out, when the finned tube needs to be plugged or overhauled again, the sealing surface of the hand hole plug can be cut open, and the finned tube is overhauled again through the inner cavity of the tubular structure.

In an embodiment of the present invention, one end of the finned tube is provided with a working medium inlet, and the other end is provided with a working medium outlet, the working medium inlet is communicated with the inner cavity of the inlet header, and the working medium outlet is communicated with the inner cavity of the outlet header; and the at least one pipe body plug is welded to the working medium inlet and/or the working medium outlet at two ends of the finned pipe, which leaks.

The technical effect achieved after the technical scheme is adopted is as follows: and the working medium flows into the finned tube from the working medium inlet, is heated into a gaseous state or a gas-liquid mixed state and then flows out of the working medium outlet. After the pipe body plug blocks the working medium inlet and the working medium outlet, the corresponding finned tube is discarded, and leakage of the finned tube is prevented.

In one embodiment of the present invention, the pipe plug is wedge-shaped, and includes a first end and a second end opposite to the first end, and the second end has a smaller diameter than the first end; wherein the second end faces the finned tube where leakage occurs.

The technical effect achieved after the technical scheme is adopted is as follows: the side face of the wedge-shaped structure has a diameter which is changed from small to large, and the pipe body plug can adapt to different diameters.

In one embodiment of the present invention, each of the finned tubes comprises: a pipe body; and the heat conduction fins are uniformly connected with the pipe body in a spiral shape.

The technical effect achieved after the technical scheme is adopted is as follows: the heat conduction fins are uniformly distributed and can relatively and comprehensively receive the heat of the flue gas outside the fin tubes.

In one embodiment of the invention, the inlet header and the outlet header are interchangeable, both the inlet header and the outlet header being located at the top or bottom of the finned tube.

The technical effect achieved after the technical scheme is adopted is as follows: the inlet header and the outlet header are located at either the top or the bottom of the finned tube to enable the finned tube to perform a heat absorbing operation.

On the other hand, the utility model provides a waste heat boiler, a serial communication port, include: a boiler housing; a plurality of said heated fin modules located within said boiler housing; wherein the plurality of heat receiving fin modules are disposed opposite to each other, and the plurality of heat receiving fin modules share one of the inlet header and one of the outlet header, or each of the heat receiving fin modules has one of the inlet header and one of the outlet header.

The technical effect achieved after the technical scheme is adopted is as follows: the plurality of heated fin modules are oppositely arranged in the waste heat boiler, so that an invalid flow channel of smoke can be reduced, and waste of smoke heat is caused.

In summary, the above embodiments of the present application may have one or more of the following advantages or benefits: i) the working opening is formed to facilitate the plugging operation of the leaked finned tube; ii) working medium inlets and working medium outlets at two ends of the finned tube are blocked by the tube body plugs, and the finned tube is discarded, so that working medium can be effectively prevented from entering the finned tube, and the use of other finned tubes is not influenced; iii) plugging the working opening facilitates reuse of the waste heat boiler without leakage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a heat receiving fin module 100 according to a first embodiment of the present invention.

Fig. 2 is a schematic view of the working opening 50.

Fig. 3A is a schematic connection diagram of the pipe stopper 25.

Fig. 3B is a cross-sectional view taken along line a-a of fig. 3A.

Fig. 4 is a schematic structural view of the pipe stopper 25 shown in fig. 3B.

Fig. 5 is a schematic connection diagram of the hand hole plug 51.

Fig. 6 is a schematic structural view of the hand hole plug 51 shown in fig. 5.

Fig. 7 is a schematic structural diagram of a waste heat boiler 200 according to a second embodiment of the present invention.

Description of the main element symbols:

200 is a waste heat boiler; 100 is a heated fin module; 10 is a header; 11 is an inlet header; 12 is an outlet header; 20 is a finned tube; 21 is a heat conducting fin; 22 is a tube body; 23 is a working medium inlet; 24 is a working medium outlet; 25 is a pipe body plug; 30 is a second finned tube; 40 is a third finned tube; 50 is a working opening; 51 is a hand hole plug; 60 is a liquid inlet; and 70 is a steam outlet.

Detailed Description

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

[ first embodiment ] A method for manufacturing a semiconductor device

Referring to fig. 1, a first embodiment of the present invention provides a structural schematic diagram of a heat receiving fin module 100, where the heat receiving fin module 100 includes: two headers 10, and a plurality of finned tubes 20 connected between the two headers 10. Wherein, two headers for example include: the inlet header 11 and the outlet header 12, the inlet header 11 and the outlet header 12 being interchangeable, i.e., the inlet header 11 is located on the top of the finned tube 20 and the outlet header 12 is located on the bottom of the finned tube 20, or alternatively, the inlet header 11 is located on the bottom of the finned tube 20 and the outlet header 12 is located on the top of the finned tube 20. The number of the finned tubes 20 may be one row, two rows or three rows, which is not limited herein. The multiple rows of finned tubes 20 are arranged in parallel and can uniformly absorb the heat of the flue gas.

In this embodiment, the finned tube 20 and the two headers 10 are joined by welding with a weld seam at the joint. When the finned tube 20 is leaking, the site of the leak is typically the weld, but may be other sites, such as between the heat conducting fins 21 and the tube body 22. Since the exhaust heat boiler 200 does not reserve a repair space, the leakage portion of the leaking finned tube 20 cannot be repaired by welding.

Preferably, referring to FIG. 2, the heated fin module 100 further includes a plurality of working openings 50, the plurality of working openings 50 being located on a side of the inlet header 11 opposite the leaky finned tube 20 and on a side of the outlet header 12 opposite the leaky finned tube 20 to provide space for the plugging of the leaky finned tube 20.

Specifically, first, the leaking finned tubes 20 are found inside the boiler casing by an endoscope. When the leakage occurs, at least one finned tube 20 of the plurality of finned tubes 20 leaks, and therefore each finned tube 20 needs to be inspected by the endoscope. The blind area of the field of view can be observed by the endoscope, and the leakage part can be inspected more accurately than by direct observation.

Then, with respect to the one or more leaky finned tubes 20 that have been found, the header 10 corresponding to the leaky finned tube 20 is found by referring to the relevant drawings.

Then, one end of the finned tube 20 is provided with a working medium inlet 23, the other end of the finned tube is provided with a working medium outlet 24, the working medium inlet 23 is communicated with the inner cavity of the inlet header 11, the working medium outlet 24 is communicated with the inner cavity of the outlet header 12, and one side of the corresponding header 10, which is opposite to the working medium inlet 23 and the working medium outlet 24, is provided with a working opening 50. For example, when the welding position of the working medium inlet 23 of the finned tube 20 leaks, the top of the inlet header 11 corresponding to the working medium inlet 23 of the finned tube 20 is provided with a working opening 50, and the bottom of the outlet header 12 corresponding to the working medium outlet 24 on the other side of the finned tube 20 is also provided with a working opening 50; when the welding position of the working medium outlet 24 of the finned tube 20 leaks and the welding position of the working medium inlet 23 does not leak, the working openings 50 corresponding to the working medium outlet 24 and the working medium inlet 23 are also formed at the same time; when the second finned tube 30 or the third finned tube 40 also suffers from leakage, the operation thereof is the same as that of the finned tube 20 described above, and will not be described again. The working opening 50 is used for providing a welding operation space and blocking the corresponding working medium outlet 23 and working medium inlet 24.

Preferably, when the working opening 50 is formed, cutting can be performed by a cutter or oxygen-acetylene cutting, and the oxygen-acetylene cutting operation is more convenient and flexible than that of the cutter. The diameter of the working opening 50 may be 110mm, which facilitates grinding and welding within the working opening 50. Of course, the diameter of the working opening 50 can be adjusted according to the actual situation, and is not limited herein.

Next, referring to fig. 3A-3B, the heated fin module 100 further includes: a plurality of body plugs. The working medium inlet 23 and the working medium outlet 24 are blocked by the pipe body plugs 25 through the working openings 50, and the working medium inlet 23, the corresponding pipe body plugs 25, the working medium outlet 24 and the corresponding pipe body plugs 25 are welded.

Preferably, and with reference to figure 4, the tubular body plug 25 is wedge-shaped with ends of different diameters D1 and D2, so as to accommodate tubular bodies of different diameters. Further, the diameter of the inner wall of the tube body 22 of the finned tube 20 is between D1 and D2, for example, D1 is set to 35mm, D2 is set to 20mm, and the diameter of the inner wall of the tube body 22 of the finned tube 20 is between 20mm and 35 mm. When the pipe body plugs 25 are installed, a hand is put into the working opening 50, the ends with small diameters of the two pipe body plugs 25, namely the ends corresponding to D2, are respectively pressed into the working medium inlet 23 and the working medium outlet 24, then the joints of the working medium inlet 23 and the corresponding pipe body plugs 25 and the joints of the working medium outlet 24 and the corresponding pipe body plugs 25 are welded together, so that the leaked finned pipes 20 are not communicated with the inlet header 11 and the outlet header 12, and the leaked finned pipes 20 are discarded in subsequent use.

Then, the welding slag and other debris in the inlet header 11 and the outlet header 12 are cleaned through the working opening 50, and the welding slag and the debris are prevented from polluting the working medium in the heated fin module 100 when the heated fin module 100 is used again.

Finally, referring to fig. 5, the heated fin module 100 further includes: and a hand hole plug 51 for plugging the working opening 50 through the hand hole plug 51 and welding the working opening 50. For example, referring to fig. 6, the hand hole plug 51 has a cylindrical shape with a diameter slightly smaller than the working opening 50, and when the working opening 50 has a diameter of 110mm, the diameter of the hand hole plug 51 may be 108mm, i.e. a welding gap is left, so that the working opening 50 and the hand hole plug 51 can be better fused during welding.

In addition, the inner side of the hand hole plug 51 is of a tubular structure, a plug opening is formed in the side, facing the finned tube 20, of the hand hole plug 51, a sealing surface is formed in the side, away from the finned tube 20, of the hand hole plug 51, when the hand hole plug needs to be overhauled again, the sealing surface of the hand hole plug 51 can be cut, and the finned tube 20 can be overhauled again through the inner tubular structure.

Preferably, referring to fig. 1, each fin tube 20 includes, for example, a tube body 22 and a plurality of heat conductive fins 21 surrounding the tube body 22. For example, the plurality of heat conducting fins 21 are spirally and circumferentially distributed on the outer wall of the tube 22, the horizontal distance and the vertical distance between adjacent heat conducting fins 21 are the same, and the inclination angles of all the heat conducting fins 21 with respect to the horizontal plane are the same. Of course, the arrangement of the heat conducting fins 21 may also be multiple rows of heat conducting fins 21, for example, two rows of heat conducting fins 21 are located on two opposite sides of the tube body 22, and the heights of the two opposite heat conducting fins 21 are the same, which is not limited herein. Wherein, there is no pipe line connected between any two finned tubes 20, namely, any one or more finned tubes 20 are discarded, and the use of other finned tubes 20 is not affected.

Furthermore, the finned tube 20 has its ends welded to the inlet and outlet headers 11 and 12, and the inner cavity of the tube body 22 is communicated with the inner cavities of the inlet and outlet headers 11 and 12. The inlet header 11 includes, for example, an inlet port 60, and the outlet header 12 includes, for example, an outlet port 70. Wherein the liquid inlet 60 may be disposed at a side of the inlet header 11, and the vapor outlet 70 may be disposed at a side of the outlet header 12.

Still further, the liquid inlet 60 is used for adding working medium such as water, the water enters the plurality of finned tubes 20 from the inlet header 11, the finned tubes 20 absorb heat of flue gas outside the finned tubes, the water inside the finned tubes is heated to a water vapor or gas-liquid mixed state, and then enters the outlet header 12 and is discharged from the steam outlet 70. The positions of the inlet header 11 and the outlet header 12 are interchangeable, that is, water can be added from the bottom of the heated fin module 100, and is discharged from the top of the heated fin module 100 after being changed into a water vapor or gas-liquid mixed state, or added from the top of the heated fin module 100, and is discharged from the bottom of the heated fin module 100 after being changed into a water vapor or gas-liquid mixed state.

[ second embodiment ]

Referring to fig. 7, a waste heat boiler 200 according to a second embodiment of the present invention includes: boiler shell (not shown in the figure) and a plurality of heated fin module 100 that first embodiment provided, a plurality of heated fin module 100 locate in the boiler shell, relative setting makes the heat of the outer flue gas of heated fin module 100 can be fully absorbed, reduces the invalid flow path of flue gas, reduces the heat waste.

Wherein a plurality of the heat receiving fin modules 100 share one inlet header 11 and one outlet header 12, or each of the heat receiving fin modules 100 has one inlet header 11 and one outlet header 12.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (9)

1. A heated fin module comprising an inlet header, an outlet header and a plurality of finned tubes connecting the inlet header and the outlet header, further comprising:

at least one working opening provided on the inlet header and/or the outlet header;

the inlet header and the outlet header each include one side connected to the finned tubes and another side remote from the finned tubes, the working openings being located on the other side on the inlet header and/or the outlet header;

and when the joint of the inlet header and/or the outlet header and any finned tube leaks, a space is provided for plugging the finned tube which leaks through the working opening, and the at least one pipe body plug is used for plugging the finned tube.

2. The heated fin module of claim 1, further comprising: and the hand hole plug is welded in the working opening.

3. The heated fin module according to claim 2, wherein the working opening is a circular hole of 110mm diameter and the outer diameter of the hand hole plug is 108 mm.

4. The heated fin module according to claim 2, wherein the hand hole plugs are tubular in configuration with a plug opening at one end and a closed face at the other end.

5. The heated fin module according to claim 1, wherein the finned tube is provided with a working medium inlet at one end and a working medium outlet at the other end, the working medium inlet is communicated with the inner cavity of the inlet header, and the working medium outlet is communicated with the inner cavity of the outlet header;

and the at least one pipe body plug is welded to the working medium inlet and/or the working medium outlet at two ends of the finned pipe, which leaks.

6. The heated fin module according to claim 5, wherein the tube plug is wedge-shaped and includes first and second opposing ends, the second end having a smaller diameter than the first end;

wherein the second end faces the finned tube where leakage occurs.

7. The heated fin module according to claim 1, wherein each of the finned tubes comprises:

a pipe body;

and the heat conduction fins are uniformly connected with the pipe body in a spiral shape.

8. The heated fin module according to claim 1, wherein the inlet and outlet headers are interchangeable, both the inlet and outlet headers being located at the top or bottom of the finned tube.

9. A waste heat boiler, comprising:

a boiler housing;

a plurality of heated fin modules as recited in any one of claims 1-8, located within the boiler housing;

wherein the plurality of heat receiving fin modules are disposed opposite to each other, and the plurality of heat receiving fin modules share one of the inlet header and one of the outlet header, or each of the heat receiving fin modules has one of the inlet header and one of the outlet header.

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