CN218626919U - Flue gas heat exchange device for gas boiler - Google Patents

Abstract

The utility model discloses a flue gas heat exchange device for gas boiler, it relates to gas boiler technical field, flue gas heat exchange device includes: the smoke-disturbing type smoke-disturbing fan comprises a plurality of fins arranged in a first direction, wherein each fin is repeatedly bent in a V shape in a second direction, the second direction is vertical to the first direction, and at least one side of each fin is provided with a plurality of protruding parts which play a role in disturbing flow to smoke; a plurality of heat exchange tubes passing through the fins in the first direction; the heat exchange tube with the fin sets up in the casing, the casing has flue gas inlet and exhanst gas outlet, the flue gas inlet with form the flue gas runner between the exhanst gas outlet, the flue gas runner flows through the heat exchange tube with the part of fin is whole to be extended along the third direction, the third direction perpendicular to first direction with the second direction. The heat exchange device can solve the problems of low heat exchange efficiency and energy waste of the existing heat exchange device.

Description

Flue gas heat exchange device for gas boiler

Technical Field

The utility model relates to a gas boiler technical field, in particular to a flue gas heat exchange device for gas boiler.

Background

At present, the heat loss of the gas-fired boiler is mainly the heat loss of exhaust gas, and the heat efficiency of the boiler is directly reflected by the temperature of the exhaust gas. The exhaust gas temperature of domestic boilers is generally higher, the exhaust gas temperature is over 100 ℃ in a full load state, and high-temperature exhaust gas is directly exhausted to the atmosphere, which is undoubtedly energy waste. Therefore, most of the finned tube or finned tube type flue gas heat exchangers currently adopt a mode of indirect contact between flue gas and a heat exchange medium, so that the waste heat of the flue gas is recovered.

If disclose a fin heat exchanger in chinese patent CN214701863U, including the casing, be equipped with heat exchange tube and fin that is used for the heat transfer in the casing, the fin overlaps in the heat exchange tube outer wall, casing inside wall top position is connected with two horizontally rollers, heat exchange tube and fin are located between two rollers, two rollers homoenergetic enough wind self axis rotation, all around having the dust screen on two rollers, dust screen one end is connected with the roller, the other end is connected with fixing device, fixing device is used for fixed dust screen. In the structure, heat exchange gas and heat exchange liquid exchange heat through the finned tubes, but the structure only improves the heat exchange efficiency by means of the heat exchange area increased by the finned tubes, and a fluid flowing boundary layer cannot be damaged, so that the heat exchange of fluid media participating in heat exchange is insufficient, and the heat exchange efficiency is low.

Still disclose a high-efficient finned heat exchanger for air conditioning unit as in chinese patent CN215982881U, including high-efficient finned heat exchanger frame, the both sides of high-efficient finned heat exchanger frame all have the installation fixed frame through the screw connection, the equal fixedly connected with heat exchange water tank of inside wall of two installation fixed frames, the top sealing connection of one of them heat exchange water tank one side has the drain pipe, the below sealing connection of another heat exchange water tank one side has the inlet tube. Contact through being provided with outer heat conduction heat transfer copper wire and the holistic outer wall of interior heat exchanger connecting pipe, play the radiating effect of heat conduction, the outer wall of heat exchanger connecting pipe is equipped with spiral radiating fin and outer wall contact can be fine to the transmission outside of the heat of inside, and be provided with fixed heat conduction heat transfer fin through the equidistance, can be fine when playing the supporting role to supplementary heat transfer water pipe carry out thermal transmission, further improved radiating efficiency and heat conductivility. Similarly, in the structure, the gas exchanges heat with the heat exchange fins, but the gas side heat exchange boundary layer is not damaged from the fluid heat transfer angle, and the heat exchange fluid only exchanges heat with the fins, so that the heat exchange efficiency is low.

From the above, although the heat exchange between the flue gas and the heat exchange medium is realized in the structures of the existing schemes, the turbulent flow of the flue gas cannot be further enhanced in the structure, so that the incomplete heat exchange is caused, the heat exchange efficiency is low, and the energy waste is caused to a certain extent.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above defect of the prior art, the embodiment of the utility model provides a technical problem that will solve provides a flue gas heat exchange device for gas boiler, and it can solve the problem that current heat exchange device heat exchange efficiency is low on the left, the energy is extravagant.

The embodiment of the utility model provides a concrete technical scheme is:

a flue gas heat exchange apparatus for a gas boiler, the flue gas heat exchange apparatus comprising:

the smoke-disturbing type smoke-disturbing fan comprises a plurality of fins arranged in a first direction, wherein each fin is repeatedly bent in a V shape in a second direction, the second direction is vertical to the first direction, and at least one side of each fin is provided with a plurality of protruding parts which play a role in disturbing flow to smoke;

a plurality of heat exchange tubes passing through the fins in the first direction;

the casing, the heat exchange tube with the fin sets up in the casing, the casing has flue gas inlet and exhanst gas outlet, the flue gas inlet with form the flue gas runner between the exhanst gas outlet, the flue gas runner flows through the heat exchange tube with the part of fin is whole to be extended along the third direction, the third direction perpendicular to the first direction with the second direction.

Preferably, in a plane formed by the first direction and the second direction, the heat exchange tubes are bent and bent to pass through the fins, and gaps are reserved between adjacent rows of the heat exchange tubes to form at least part of the flue gas flow channel; the raised portions are located at gaps between adjacent rows of the heat exchange tubes.

Preferably, a plurality of said heat exchange tubes are arranged in said third direction; the adjacent heat exchange tubes are arranged in parallel or in staggered manner.

Preferably, a plurality of the protrusions are arranged in line in the third direction.

Preferably, the heat exchange tube passes through the bends of the fins, and the convex portions are located at the planes between the adjacent bends of the fins.

Preferably, the protrusion has a predetermined shape and a hole, and the predetermined shape at least includes one of the following: rectangular, oval, trapezoidal.

Preferably, the protrusion is linear and extends in the third direction.

Preferably, the flue gas heat exchange device further comprises: follow inlet tube that the third direction extends and follow the outlet pipe that the third direction extends, it is a plurality of the one end of heat exchange tube with the inlet tube is connected, and is a plurality of the other end of heat exchange tube with the outlet pipe is connected, the water inlet of inlet tube with the delivery port of outlet pipe all faces the incoming flow direction of flue gas.

The technical scheme of the utility model following beneficial effect that is showing has:

when smoke enters from the smoke inlet and enters the heat exchanger through the smoke flow channel between two adjacent fins, in the smoke flow channel formed by the gaps between the two fins, due to the blocking effect of the protrusions on the fins, part of smoke circulates through the gaps between the adjacent protrusions, the other part of smoke circulates through the gaps between the protrusions and the adjacent fins, so that a smoke laminar flow boundary layer is damaged, the turbulence effect is enhanced, the convection effect of the smoke among the fins is enhanced, the heat exchange efficiency of the smoke and a heat exchange medium in the heat exchange tube is improved, and the smoke after heat exchange flows out through the smoke outlet.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not limited in scope thereby. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art with the benefit of the teachings of this invention can select various possible shapes and proportional dimensions to implement the invention depending on the specific situation.

Fig. 1 is a schematic perspective view of a flue gas heat exchange device (not including a housing) according to an embodiment of the present invention;

FIG. 2 is a side view of the flue gas heat exchange device of FIG. 1;

FIG. 3 is a rear view of the flue gas heat exchange apparatus of FIG. 1;

FIG. 4 is a top plan view of the flue gas heat exchange device of FIG. 1;

FIG. 5 is a front view of a fin in a first embodiment of an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a fin according to a first embodiment of the present invention;

FIG. 7 is a left side view of a fin in a first embodiment of the present invention;

FIG. 8 is a top view of a first embodiment of a fin according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a fin according to a second embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a fin according to a third embodiment of the present invention;

fig. 11 is a schematic structural diagram of a fin according to a fourth embodiment in an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a fin according to a fifth embodiment of the present invention;

fig. 13 is a schematic structural diagram of a fin according to a sixth embodiment in an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a fin according to a seventh embodiment of the present invention.

Reference numerals of the above figures:

1. a water inlet pipe; 2. a water outlet pipe; 3. a heat exchange pipe; 4. a fin; 41. a raised portion.

Detailed Description

The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as falling within the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to solve the problem of low heat exchange efficiency and energy waste of the existing heat exchange device, the present application provides a flue gas heat exchange device for a gas boiler, fig. 1 is a schematic perspective view of the flue gas heat exchange device (not including a housing) in the embodiment of the present invention, fig. 2 is a side view of the flue gas heat exchange device in fig. 1, fig. 3 is a back view of the flue gas heat exchange device in fig. 1, fig. 4 is a top view of the flue gas heat exchange device in fig. 1, fig. 5 is a front view of the fin under the first embodiment in the embodiment of the present invention, fig. 6 is a schematic perspective view of the fin under the first embodiment in the embodiment of the present invention, fig. 7 is a left view of the fin under the first embodiment in the embodiment of the present invention, fig. 8 is a top view of the fin under the first embodiment in the embodiment of the present invention, fig. 9 is a schematic structural view of the fin under the second embodiment in the embodiment of the present invention, fig. 10 is a schematic structural view of the fin under the third embodiment of the present invention, fig. 11 is a schematic view of the fin under the embodiment of the present invention, fig. 12 is a schematic structural view of the fin under the present invention, and the fin under the embodiment of the present invention, the present invention is a schematic structural view of the fin under the present invention, and the present invention includes a schematic view of the heat exchange device under the sixth embodiment of the heat exchange device, fig. 14, and the heat exchange device in the sixth embodiment of the present invention, fig. 14: the flue gas purification device comprises a plurality of fins 4 arranged in a first direction, wherein each fin 4 is repeatedly bent in a V shape in a second direction, the second direction is vertical to the first direction, and at least one side of each fin 4 is provided with a plurality of protruding parts 41 playing a role in disturbing flow to flue gas; a plurality of heat exchange tubes 3 penetrating the fins 4 along a first direction; the shell, heat exchange tube 3 and fin 4 set up in the shell, and the shell has smoke inlet and exhanst gas outlet, forms the flue gas runner between smoke inlet and the exhanst gas outlet, and the flue gas runner extends along the third direction through the whole of heat exchange tube 3 and the part of fin 4 of flowing through, and the third direction perpendicular to first direction and second direction.

As shown in fig. 1 to 4, a plurality of fins 4 may be arranged in the first direction X, with a certain gap between adjacent fins 4. Each fin 4 may be substantially rectangular in shape. As shown in fig. 1, 4 to 6, and 8, each fin 4 is repeatedly bent in a V shape in the second direction Y, which is substantially perpendicular to the first direction.

As shown in fig. 5 to 14, at least one side of the fin 4 has a plurality of protrusions 41 that disturb the flow of the flue gas. The heat exchange tube 3 and the fin 4 are arranged in a shell, the shell is provided with a smoke inlet and a smoke outlet, a smoke flow channel is formed between the smoke inlet and the smoke outlet, as shown in fig. 1, the whole part of the smoke flow channel flowing through the heat exchange tube 3 and the fin 4 extends along a third direction Z, and the third direction is perpendicular to the first direction and the second direction.

A plurality of heat exchange tubes 3 are inserted through the fins 4 in a first direction. As shown in fig. 1-4, in one particular embodiment, the heat exchange tubes 3 are serpentine across the fins 4 in planes defined by the first and second directions with gaps between adjacent rows of heat exchange tubes 3 to define at least a portion of the flue gas flow path. Gaps between adjacent rows of heat exchange tubes 3 and gaps between adjacent fins 4 jointly form part of flue gas flow channels.

As shown in fig. 8, a plurality of bosses 41 are located at the gaps between adjacent rows of heat exchange tubes 3. As shown in fig. 1, a plurality of heat exchange tubes 3 are arranged in a third direction. The heat exchange tube 3 passes through the bends of the fins 4, and the bosses 41 are located at the planes between adjacent bends of the fins 4. In order to facilitate that each heat exchange tube 3 can penetrate through the bent part of the fin 4, the adjacent heat exchange tubes 3 are arranged in a row or a fork row.

When flue gas enters from a flue gas inlet, the flue gas enters the heat exchanger through a flue gas channel between two adjacent fins 4, in the flue gas channel formed by the gaps between the two fins 4, the flue gas is separated by the protrusions 41 on the fins 4, one part of the flue gas circulates through the gaps between the adjacent protrusions 41, the other part of the flue gas circulates through the gaps between the protrusions 41 and the adjacent fins 4, thus a laminar flow boundary layer of the flue gas is damaged, the turbulence effect is enhanced, the convection effect of the flue gas between the fins 4 is strengthened, the heat exchange efficiency of the flue gas and a heat exchange medium in the heat exchange tube 3 is improved, and the flue gas after heat exchange flows out through a flue gas outlet.

As a practical matter, as shown in fig. 5 to 8, the protruding portion 41 may have a V-shape, and the pointed end of the lower end of the V-shape faces the direction of the flow of the flue gas. Because the two ends of V type are towards the incoming flow direction of flue gas respectively, it can further increase the degree to flue gas laminar flow boundary layer destruction, and the turbulent flow effect can be further strengthened, and the convection action of flue gas can obtain further strengthening between fin 4. In above-mentioned structure, carry out the integrated configuration design with V type bellying 41 and the fin 4 that relapse the V type and buckle, collocation heat exchange tube 3 makes up into flue gas heat exchange device, need not other internal connection spare, this kind of scheme increases forms such as fin 4 fixing device with fin 4 formula heat exchanger and compares, and is structurally simple more convenient, can greatly reduce the risk that devices such as spoilers drop etc. brought, and the wholeness of device structure is better.

In other possible embodiments, for example, as shown in fig. 9, the protrusion 41 may have an S shape, and both ends of the S shape face the second direction, respectively. Therefore, one end of the S-shaped structure faces to the direction of the smoke flowing direction, so that the damage degree to the smoke laminar boundary layer is further increased. For another example, as shown in fig. 14, the projection 41 is linear and extends in the third direction.

In other possible embodiments, as shown in fig. 10 to 13, the protrusion 41 may have a predetermined shape with a hole, and the predetermined shape includes at least one of the following: rectangular, oval, trapezoidal. The ellipse may be a partial ellipse, an ellipse with a small eccentricity, or an ellipse with a small eccentricity. The holes are formed below the preset shapes, the degree of damage of the preset shapes to the laminar boundary layer of the flue gas is utilized, the flue gas on one side of the fin 4 can enter the other side of the fin 4 through the holes in the flowing process due to the holes, the laminar boundary layer in the flowing process of the flue gas in the flue gas channel on the other side is further damaged, the turbulent flow effect is increased in another mode, the convection effect of the flue gas among the fins 4 can be strengthened, and therefore the heat exchange efficiency of the flue gas and the heat exchange media involved in the heat exchange is further enhanced.

As a possibility, as shown in fig. 1, the flue gas heat exchange device may further include: the water inlet pipe 1 that extends along the third direction and the outlet pipe 2 that extends along the third direction, the one end of a plurality of heat exchange tubes 3 is connected with inlet pipe 1, and the other end of a plurality of heat exchange tubes 3 is connected with outlet pipe 2. The heat exchange media in the heat exchange tubes 3 are conveyed through the water outlet tube 2 and the water inlet tube 1. Further, the water inlet of the water inlet pipe 1 and the water outlet of the water outlet pipe 2 face the incoming flow direction of the flue gas.

The flue gas heat exchange device in this application can destroy the boundary layer of flue gas flow in-process, makes flue gas and heat transfer medium better carry out the heat exchange, realizes the degree of depth waste heat recovery of flue gas. This flue gas heat exchange device not only can absorb the sensible heat in the gas boiler flue gas as degree of depth waste heat recovery device, can also absorb its latent heat, makes a large amount of vapor in the flue gas condense into the comdenstion water at the cooling in-process through high-efficient flue gas heat exchange device promptly, through setting up water treatment facilities, can carry out the moisturizing for the system simultaneously. In the long run, to gas boiler degree of depth waste heat recovery, with condensate water reuse wherein, not only can play energy-concerving and environment-protective effect, can also reduce heat supply running cost simultaneously, improve the enterprise's income, consequently use flue gas degree of depth waste heat recovery technique in gas boiler very necessary.

All articles and references disclosed, including patent applications and publications, are incorporated by reference herein for all purposes. The term "consisting essentially of 8230comprises the elements, components or steps identified and other elements, components or steps which do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the attributes described that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The above embodiments are only embodiments of the present invention, and although the embodiments of the present invention are disclosed as above, the contents are only embodiments adopted for facilitating understanding of the present invention, and are not intended to limit the present invention. Those skilled in the art can make various modifications and changes in form and detail of the embodiments without departing from the spirit and scope of the present invention, but the scope of the present invention is still limited by the appended claims.

Claims (8)

1. A flue gas heat exchange device for a gas boiler, comprising:

the smoke-free air conditioner comprises a plurality of fins arranged in a first direction, wherein each fin is repeatedly bent in a V shape in a second direction, the second direction is vertical to the first direction, and at least one side of each fin is provided with a plurality of protruding parts which play a role in disturbing flow of smoke;

a plurality of heat exchange tubes passing through the fins in the first direction;

the heat exchange tube with the fin sets up in the casing, the casing has flue gas inlet and exhanst gas outlet, the flue gas inlet with form the flue gas runner between the exhanst gas outlet, the flue gas runner flows through the heat exchange tube with the part of fin is whole to be extended along the third direction, the third direction perpendicular to first direction with the second direction.

2. The flue gas heat exchange apparatus for a gas boiler of claim 1, wherein said heat exchange tubes are serpentine across said fins in a plane formed by said first and second directions, with gaps between adjacent rows of said heat exchange tubes to form at least part of said flue gas flow path; the raised portions are located at gaps between adjacent rows of the heat exchange tubes.

3. The flue gas heat exchange device for a gas boiler as recited in claim 2, wherein a plurality of said heat exchange tubes are arranged in said third direction; and the adjacent heat exchange tubes are arranged in a row or in a staggered manner.

4. The flue gas heat exchange device for a gas boiler according to claim 3, wherein a plurality of the protrusions are arranged in the third direction.

5. The flue gas heat exchange device for a gas boiler according to claim 1, wherein the heat exchange tubes pass at the bends of the fins, and the projections are located at the planes between adjacent bends of the fins.

6. The flue gas heat exchange device for a gas boiler according to claim 1, wherein said protrusions are shaped and perforated, said predetermined shape comprising at least one of: rectangular, oval, trapezoidal.

7. The flue gas heat exchange device for a gas boiler according to claim 1, wherein the protrusion is linear and extends in the third direction.

8. The flue gas heat exchange device for a gas boiler according to claim 1, further comprising: follow the inlet tube that the third direction extends and follow the outlet pipe that the third direction extends, it is a plurality of the one end of heat exchange tube with the inlet tube is connected, and is a plurality of the other end of heat exchange tube with the outlet pipe is connected, the water inlet of inlet tube with the delivery port of outlet pipe all faces the incoming flow direction of flue gas.

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