CN216308688U - Flue gas heat exchanger structure for avoiding dust deposition in tail sealing cover - Google Patents
Flue gas heat exchanger structure for avoiding dust deposition in tail sealing cover Download PDFInfo
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- CN216308688U CN216308688U CN202122639759.2U CN202122639759U CN216308688U CN 216308688 U CN216308688 U CN 216308688U CN 202122639759 U CN202122639759 U CN 202122639759U CN 216308688 U CN216308688 U CN 216308688U
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Abstract
The utility model discloses a flue gas heat exchanger structure for avoiding dust accumulation in a tail sealing cover, which comprises an external support component, a heat exchange tube and a dust-crossing preventing structure arranged on one side of the heat exchange tube far away from a header end; a plurality of heat exchange straight pipes sequentially penetrate through the header end supporting plate and the tail supporting plate and then are connected into heat exchange pipes at two ends through elbows; the dust leakage prevention structure comprises a vertical sealing plate fixedly connected with the heat exchange tube, a frame is fixedly wrapped around the vertical sealing plate, and the frame can slidably abut against the inner side surfaces of the four limiting plates; the sealing plate and the frame can freely slide with each limiting plate in the dust-mixing prevention structure, and the requirement for absorbing expansion difference can be met. The closing plate is connected with heat exchange tube welded seal, and the reasonable flow direction and the action of gravity of having considered cigarette ash of size are reserved to the dislocation set between each limiting plate and the frame simultaneously, have rationally avoided cigarette ash to get into afterbody sealed cowling through preventing the ash mixing structure in, can effectively prolong heat exchanger elbow life-span.
Description
Technical Field
The utility model relates to the field of flue gas heat exchangers, in particular to a flue gas heat exchanger structure for avoiding dust accumulation in a tail sealing cover.
Background
The common flue gas heat exchanger in engineering generally adopts the mode of flue gas flowing outside the pipe and liquid flowing inside the pipe, and the whole heat exchanger can be formed by combining a plurality of heat exchange assemblies according to the scale of the flue gas heat exchanger. Generally, the liquid side and the flue gas side have a large temperature difference, the flow of flue gas outside the pipe is large, the length of the heat exchange pipe is long, a plurality of supporting plates for supporting the heat exchange pipe are arranged on the length of the heat exchange pipe for supporting the heat exchange pipe under general conditions, and supporting pipe plates are welded and connected into a whole through supporting pipes for ensuring the supporting strength. Meanwhile, in order to ensure the liquid side sealing, the heat exchange tube adopts an elbow connection mode, a header end support plate can be welded with the heat exchange tube (can be welded in a sealing mode, so that the side end plate serves as a wall plate for sealing smoke) and serves as a fixed fulcrum without relative sliding, the rest heat exchange tubes and the support plates adopt a mode of free sliding transportation (the heat exchange tubes penetrate through the support plates, and have gaps with the support plates and can slide), the expansion difference and the thermal stress generated by the thermal expansion coefficient and the temperature difference of materials of the support framework positioned on the air side and the heat exchange tubes for transporting liquid in the tubes are compensated, and meanwhile, in order to ensure that the smoke does not leak to the atmosphere, a tail sealing cover is additionally arranged outside the tail support plate.
In order to eliminate expansion difference, a gap is reserved between the tail supporting plate and the heat exchange tube and used for free sliding, when the flue gas is not subjected to dust removal treatment, soot in the flue gas can enter the tail sealing cover through the gap, after the operation time is long, the deposited amount of the soot in the tail sealing cover can submerge the elbow of the heat exchange tube and corrode the elbow, and the safe and normal operation of the heat exchanger is seriously affected.
Therefore, a scheme or a structure is needed, which can ensure that the expansion difference between the heat exchange tube and the support framework is eliminated, and can avoid the cigarette ash from entering the tail sealing cover, so that the normal application of the flue gas heat exchanger is realized, the service life of the heat exchanger is prolonged, and the safety production is guaranteed to be very important.
SUMMERY OF THE UTILITY MODEL
The utility model solves the technical problem of providing a flue gas heat exchanger structure for avoiding ash accumulation in a tail sealing cover, wherein in the existing heat exchanger, a gap is reserved between a reserved tail supporting plate and a heat exchange tube for free sliding in order to eliminate expansion difference, and when flue gas is not subjected to dust removal treatment, soot in the flue gas enters the tail sealing cover through the gap to corrode an elbow.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a flue gas heat exchanger structure for avoiding dust accumulation in a tail sealing cover comprises an external support component, a heat exchange tube and a dust-crossing preventing structure arranged on one side of the heat exchange tube, which is far away from a header end;
the external support component comprises a vertical header end support plate, a middle support plate and a tail support plate, and transverse support rods are arranged between the header end support plate and the middle support plate and between the middle support plate and the tail support plate; a plurality of heat exchange straight pipes sequentially penetrate through the header end supporting plate and the tail supporting plate and are connected into heat exchange pipes at two ends through elbows; a sealing cover for coating the heat exchange straight pipe and the elbow is fixed on the outer side surface of the tail supporting plate;
the dustproof structure comprises a top limiting plate, a bottom limiting plate, a windward limiting plate and a leeward limiting plate which are fixed on the inner side surface of the tail supporting plate and are arranged in a square shape, and further comprises a vertical sealing plate fixedly connected with the heat exchange tube, a frame is fixedly wrapped around the vertical sealing plate, and the frame slidably abuts against the inner side surfaces of the four limiting plates through a limiting sliding groove; the distance between the left end of the frame at the initial position and the tail supporting plate is a first width, and the first width is larger than the expansion difference when the expansion of the supporting component is smaller than that of the heat exchange tube; the width of the top limiting plate and the windward limiting plate exceeding the corresponding frames is a second width, and the second width is larger than the expansion difference when the expansion of the supporting component is larger than that of the heat exchange tube; the length of the frame exceeding the bottom limiting plate and the leeward side limiting plate is a third width, and the third width is smaller than the expansion difference when the expansion of the supporting component is smaller than that of the heat exchange tube; the width of the frame, the coincident section of the bottom limiting plate and the leeward side limiting plate is a fourth width, and the fourth width is larger than the expansion difference when the expansion of the supporting component is larger than that of the heat exchange tube.
In particular, the external support assembly further comprises diagonal braces connecting the middle support plate and the tail support plate, and the middle support plate and the header end support plate at the edges.
Compared with the prior art, the utility model has the following advantages and beneficial effects: the sealing plate and the frame can freely slide with each limiting plate in the dust-mixing prevention structure, and the requirement for absorbing expansion difference can be met. Closing plate and heat exchange tube welded seal are connected, and the reasonable flow direction and the action of gravity of having considered cigarette ash of size are reserved to the dislocation set between each limiting plate and the frame simultaneously, have rationally avoided cigarette ash to get into the afterbody sealed cowling through preventing the ash mixing structure in, can effectively prolong heat exchanger elbow life-span, guarantee safety in production, are favorable to reducing mechanical loss, reduction in production cost ensures staff life safety simultaneously.
Drawings
FIG. 1 is a schematic top view of the present invention.
Fig. 2 is a schematic front view of an anti-cross-ash structure.
Fig. 3 is a left view structural diagram of the ash cross-proof structure.
The explanation of each reference number in the figure is: a heat exchange tube-1; a header-2; a header end support plate-3; a middle support plate-4; a tail support plate-5; a transverse support bar-6; a sealing cover-7; ash cross-proof structure-8; a top limiting plate-81; a bottom limiting plate-82; a windward side limiting plate-83; a leeward side limiting plate-84; a vertical sealing plate-9; a frame-91; a first width-92; a second width-93; third width-94; fourth width-95.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so as to further understand the concept, the technical problems solved, the technical features constituting the technical solutions, and the technical effects brought by the technical solutions.
Referring to fig. 1 to 3, the flue gas heat exchanger structure for preventing dust from being accumulated in the tail sealing cover of the utility model comprises an external supporting component, a heat exchange tube 1 and a dust-mixing preventing structure 8 arranged on one side of the heat exchange tube 1 far away from the end of the header 2;
the external support component comprises a vertical header end support plate 3, a middle support plate 4 and a tail support plate 5, and transverse support rods 6 are arranged between the header end support plate 3 and the middle support plate 4 and between the middle support plate 4 and the tail support plate 5; a plurality of heat exchange straight pipes sequentially penetrate through the header end supporting plate 4 and the tail supporting plate 5 and then are connected into a heat exchange pipe 1 at two ends through elbows; a sealing cover 7 for coating the heat exchange straight pipe and the elbow is fixed on the outer side surface of the tail supporting plate 5;
the dust mixing prevention structure 8 comprises a top limiting plate 81, a bottom limiting plate 82, a windward limiting plate 83 and a leeward limiting plate 84 which are fixed on the inner side surface of the tail supporting plate 5 and are arranged in a square shape, and further comprises a vertical sealing plate 9 fixedly connected with the heat exchange tube 1, a frame 91 is fixedly wrapped around the vertical sealing plate 9, and the frame 91 can slidably abut against the inner side surfaces of the four limiting plates through a limiting sliding groove; the distance between the left end of the frame 91 at the initial position and the tail supporting plate 5 is a first width 92, and the first width 92 is greater than the expansion difference when the expansion of the supporting component is smaller than that of the heat exchange tube 1; the width of the top limiting plate 81 and the windward limiting plate 83 exceeding the frame 91 is a second width 93, and the second width 93 is greater than the expansion difference when the expansion of the support component is greater than that of the heat exchange tube 1; the length of the frame 91 exceeding the bottom limiting plate 82 and the leeward side limiting plate 84 is a third width 94, and the third width 94 is smaller than the expansion difference when the expansion of the support assembly is smaller than that of the heat exchange tube 1; the width of the overlapped section of the frame 91, the bottom limiting plate 82 and the leeward side limiting plate 84 is a fourth width 95, and the fourth width 95 is greater than the expansion difference when the expansion of the supporting component is greater than the expansion of the heat exchange tube 1.
In another preferred embodiment, each side wall of the vertical sealing plate 9 is provided with a plurality of mounting grooves, compression springs are arranged in the mounting grooves, and the frame 91 is fixedly connected with the compression springs; the frame 91 is tightly abutted against the limiting plates in all directions through the compression spring, meanwhile, an outward acting force is applied to the frame 91, and the gap between the frame 91 and the limiting plates in all directions is ensured to be small enough, so that the quantity of cigarette ash entering the sealing cover 7 due to accidental factors is reduced.
As a preferred embodiment, the external support assembly further comprises diagonal braces connecting the middle support plate 4 and the tail support plate 5, the middle support plate 4 and the header end support plate 3 at the edges.
In the utility model, ash-containing flue gas acts downwards from the upper part or acts along the windward side to the leeward side, when the ash falls down due to the gravity or is blown by hot air to exchange heat with the heat exchange tube 1, the top limiting plate 81 and the windward limiting plate 83 shield the gap between the top limiting plate 81 and the windward limiting plate 83 and the frame 91, so that the ash is prevented from flowing into the sealing cover 7 at the tail part, and the effect of preventing ash deposition in the sealing cover is achieved. Because the temperature of the external supporting component is different from that of the heat exchange tube 1, the expansion amount caused by the temperature difference is different, and the following conditions are mainly divided:
when the expansion amount of the external support component is smaller than that of the heat exchange tube 1, the frame 91 is relatively displaced leftwards on the top limiting plate 81 and the windward side limiting plate 83 due to the difference of the expansion amounts, and the first width 92 in the initial state is required to be larger than the relative displacement amount, namely the difference value of the expansion amounts of the external support component and the heat exchange tube 1, so that the frame 91 is ensured not to collide with the tail supporting plate 5, and a sufficient distance is reserved to absorb the difference value of the expansion amounts.
On bottom limiting plate 82 and leeward side limiting plate 84 this moment, relative displacement also can take place for frame 91 to left, and the length that needs to guarantee third width 94 under the initial condition this moment is less than this relative displacement volume, guarantees that the right-hand member of bottom limiting plate 82 and leeward side limiting plate 84 can not surpass the end of frame 91, leads to piling up of cigarette ash and gets into sealed cowling 7 along the gap department between frame 91 and bottom limiting plate 82 and the leeward side limiting plate 84.
When outside supporting component inflation volume is greater than heat exchange tube 1 inflation volume, frame 91 is because the difference of inflation volume, relative displacement takes place rightwards on top limiting plate 81 and windward side limiting plate 83, need the second width 93 under the initial condition this moment be greater than this relative displacement be outside supporting component and heat exchange tube inflation volume's difference promptly, guarantee that frame 91 still is located the inside of top limiting plate 81 and windward side limiting plate 83, avoid cigarette ash to pile up and lead to cigarette ash to get into sealing boot 7 in the gap department between frame 91 and top limiting plate 81 and windward side limiting plate 83.
On bottom limiting plate 82 and leeward side limiting plate 84 this moment, relative displacement also can take place to the right for frame 91, needs fourth width 95 under the initial condition this moment to be greater than this relative displacement difference that outside supporting component and heat exchange tube expansion volume are promptly, guarantees that the left end of frame 91 can not surpass the right-hand member of bottom limiting plate 82 and leeward side limiting plate 84, avoids appearing the phenomenon of frame 91 slippage.
The terms "connected" and "fixed" in the description of the present invention may be fixed, formed, welded, or mechanically connected, and the specific meaning of the above terms in the present invention is understood.
In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc. are used in the orientation or positional relationship indicated only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element referred to must have a particular orientation and therefore should not be construed as limiting the present invention.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the utility model has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. A flue gas heat exchanger structure for avoiding dust accumulation in a tail sealing cover comprises an external support component, a heat exchange tube (1) and a dust-mixing prevention structure (8) arranged on one side of the heat exchange tube (1) far away from a header (2); it is characterized in that the preparation method is characterized in that,
the external support component comprises a vertical header end support plate (3), a middle support plate (4) and a tail support plate (5), and transverse support rods (6) are arranged between the header end support plate (3) and the middle support plate (4) and between the middle support plate (4) and the tail support plate (5); a plurality of heat exchange straight pipes sequentially penetrate through the header end supporting plate (4) and the tail supporting plate (5) and then are connected into a heat exchange pipe (1) at two ends through elbows; a sealing cover (7) for coating the heat exchange straight pipe and the elbow is fixed on the outer side surface of the tail supporting plate (5);
the dust mixing prevention structure (8) comprises a top limiting plate (81), a bottom limiting plate (82), a windward limiting plate (83) and a leeward limiting plate (84) which are fixed on the inner side surface of the tail supporting plate (5) and are arranged in a square shape, and further comprises a vertical sealing plate (9) fixedly connected with the heat exchange tube (1), wherein a frame (91) is fixedly wrapped around the vertical sealing plate (9), and the frame (91) can slidably abut against the inner side surfaces of the four limiting plates through a limiting sliding groove; the distance between the left end of the frame (91) at the initial position and the tail supporting plate (5) is a first width (92), and the first width (92) is larger than the expansion difference when the expansion of the supporting component is smaller than that of the heat exchange tube (1); the width of the top limiting plate (81) and the windward side limiting plate (83) exceeding the frame (91) is a second width (93), and the second width (93) is greater than the expansion difference when the expansion of the supporting component is greater than that of the heat exchange tube (1); the length of the frame (91) exceeding the bottom limiting plate (82) and the leeward side limiting plate (84) is a third width (94), and the third width (94) is smaller than the expansion difference when the expansion of the supporting component is smaller than that of the heat exchange tube (1); the width of the overlapped section of the frame (91) and the bottom limiting plate (82) and the leeward side limiting plate (84) is a fourth width (95), and the fourth width (95) is larger than the expansion difference when the expansion of the supporting component is larger than that of the heat exchange tube (1).
2. The flue gas heat exchanger structure for avoiding ash deposition in the tail seal housing as claimed in claim 1, wherein said external support assembly further comprises diagonal brace bars connecting the middle support plate (4) and the tail support plate (5), the middle support plate (4) and the header end support plate (3) at the edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639759.2U CN216308688U (en) | 2021-10-29 | 2021-10-29 | Flue gas heat exchanger structure for avoiding dust deposition in tail sealing cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639759.2U CN216308688U (en) | 2021-10-29 | 2021-10-29 | Flue gas heat exchanger structure for avoiding dust deposition in tail sealing cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216308688U true CN216308688U (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122639759.2U Active CN216308688U (en) | 2021-10-29 | 2021-10-29 | Flue gas heat exchanger structure for avoiding dust deposition in tail sealing cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216308688U (en) |
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2021
- 2021-10-29 CN CN202122639759.2U patent/CN216308688U/en active Active
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