CN115574464A

CN115574464A - Combustion heat exchange system of full-premixing condensation wall-mounted boiler

Info

Publication number: CN115574464A
Application number: CN202110765393.5A
Authority: CN
Inventors: 梁友高; 孙云帆
Original assignee: Foshan Sewing Leaf Bird Environmental Technology Co ltd
Current assignee: Foshan Sewing Leaf Bird Environmental Technology Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2023-01-06

Abstract

The invention discloses a combustion heat exchange system of a full-premixing condensation wall-mounted boiler, which comprises a shell, a combustor and a heat exchanger, wherein the combustor is arranged in the shell, and the heat exchanger is arranged on the periphery of the combustor; the combustor comprises a hollow shell and a heat-conducting premixing partition plate, wherein a plurality of combustion holes are formed in the outer surface of the hollow shell, the heat-conducting premixing partition plate is arranged on the inner wall of the hollow shell, and through holes with different diameters are distributed in the middle of the heat-conducting premixing partition plate; the heat exchanger comprises a spiral light pipe coil and a spiral finned tube coil, wherein the tubes between the spiral light pipe coils are tightly sealed, and the spiral finned tube coil is arranged at the periphery of the spiral light pipe coil; the application aims at providing a full premix condensation hanging stove burning heat transfer system that can reach better mixed effect, can improve combustion effect and stability, has optimized heat transfer performance better and has prevented blockking up the effect.

Description

Combustion heat exchange system of full-premixing condensation wall-mounted boiler

Technical Field

The invention relates to the technical field of combustion heat exchange, in particular to a combustion heat exchange system of a full-premixing condensation wall-mounted boiler.

Background

At present generally apply to in the gas equipment of full premix burning condensation heat transfer, because the effect of premixing of the full premix combustion system of traditional technique is not good, lead to the combustion condition not good enough, combustion efficiency is also not high, and the part is high because of combustion temperature, take place the tempering easily, and can appear the unstable problem of burning when low-temperature gas mixture gets into the burning, and the relatively poor place of service environment, more dust has in the air, according to the heat exchanger structure of present general coil pipe formula, because the clearance between pipe and pipe is less, and after the dust met the comdenstion water, produce certain consistency, lead to blockking up the scheduling problem. Therefore, most of the structures of the gas equipment for full-premix combustion condensation heat exchange in the traditional technology, and the high-temperature flue gas output by the full-premix burner are utilized to realize the efficiency of condensation heat exchange and prevent the blockage condition, so that the space is greatly improved and perfected.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention provides a combustion heat exchange system for a fully premixed wall hanging stove, which can improve combustion efficiency, enhance heat exchange effect, and prevent blockage.

In order to achieve the purpose, the invention adopts the following technical scheme:

a combustion heat exchange system of a full-premixing condensation wall-mounted boiler comprises a shell, a combustor and a heat exchanger, wherein the combustor is arranged inside the shell, and the heat exchanger is arranged on the periphery of the combustor; the combustor comprises a hollow shell and a heat-conducting premixing partition plate, wherein a plurality of combustion holes are formed in the outer surface of the hollow shell, the heat-conducting premixing partition plate is arranged on the inner wall of the hollow shell, and through holes with different diameters are distributed in the middle of the heat-conducting premixing partition plate; the heat exchanger comprises a spiral light pipe coil and a spiral finned tube coil, pipes between the spiral light pipe coils are tightly attached and sealed, and the spiral finned tube coil is arranged on the periphery of the spiral light pipe coil.

Preferably, a channel between the spiral light pipe coil and the hollow shell and a channel between the spiral light pipe coil and the spiral finned tube coil are matched to form a U-shaped heat exchange channel.

Preferably, the U-shaped heat exchange channel comprises an inlet section, an outlet section and a direction-changing section, wherein the inlet section is positioned close to the burner; the outlet section is positioned close to the inner wall of the shell; one end of the turning section is communicated with one end of the inlet section, and the other end of the turning section is communicated with one end of the outlet section.

Preferably, the outer shell further comprises an upper end plate, an upper heat insulation plate, a lower end plate, a lower heat insulation plate, a smoke blocking disc, a cylindrical shell, a smoke collecting hood and a duct pipe; the upper end plate is arranged at the top of the heat exchanger, and a connector for mounting an ignition needle, a flame feedback needle and a fan is arranged on the upper end plate; the lower end plate is arranged at the bottom of the heat exchanger; the top of the cylindrical shell is connected with the upper end plate, and the bottom of the cylindrical shell is connected with the lower end plate; the upper heat insulation plate is fixed on the upper end plate; the smoke collecting cover is connected with one side of the lower end plate, and one side of the smoke collecting cover is communicated with the air duct pipe; the fume collecting hood is used for collecting fume and collecting condensed water dropped in the operation process of the spiral light pipe coil and the spiral finned pipe coil; the fume collecting hood is provided with a water outlet; the lower heat insulation plate is fixed on the smoke blocking disc; the lower end plate is provided with a boss for supporting the smoke blocking disc, the spiral light pipe coil and the spiral finned tube coil; the smoke blocking disc is fixed below the spiral light pipe coil and used for receiving and collecting condensed water dropping in the operation process of the spiral light pipe coil and preventing high-temperature smoke after combustion from flowing out of the lower portion of the spiral light pipe coil.

Preferably, one end of the spiral light pipe coil is provided with a water outlet, and the other end of the spiral light pipe coil is provided with a transit water inlet; one end of the spiral finned tube coil is provided with a water inlet, and the other end of the spiral finned tube coil is provided with a transfer water outlet; the transfer water inlet is communicated with the transfer water outlet.

Preferably, the heat exchanger further comprises a transfer joint, and the transfer joint communicates the transfer water inlet with the transfer water outlet.

Preferably, the adjacent heat-conducting premixing partition plates are arranged according to a preset spacing distance, and the through holes on the adjacent heat-conducting premixing partition plates are distributed in a staggered manner.

Preferably, the shell further comprises a fan base arranged at the top of the shell and used for feeding mixed gas into the hollow shell.

Preferably, the smoke baffle disc is provided with a water outlet and connected with a condensed water drainage pipeline, and the condensed water drainage pipeline penetrates through the bottom of the smoke collecting hood and extends out of the smoke collecting hood.

Preferably, the spiral light pipe coil is a round smooth pipe, and the spiral finned pipe coil is of a spiral structure; the distance between fins in the spiral finned tube coil is controlled to be 1.5-3.0 mm.

The invention has the beneficial effects that: the burner port cooperation heat conduction mixes the baffle in advance to the centre of heat conduction mixes the baffle in advance and distributes and have different diameter through-holes, when the gas is at combustor surface combustion, the heat preheats the gas mixture that gets into in the cavity casing along heat conduction mixes the baffle in advance, can reduce the surface thermal stress concentration degree of combustor, and the gas mixture passes through different diameter through-holes on the heat conduction mixes the baffle in advance, utilize the difference of air velocity behind the hole, enable the gas mixture further to mix, reach better mixed effect, can improve combustion effect and stability.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another embodiment of the present invention;

FIG. 3 is a schematic view of the structure of the burner of the present invention;

FIG. 4 is a schematic view showing the structure of the helical light-pipe coil and the helical finned tube coil in the present invention.

Wherein: the device comprises a shell 11, an upper end plate 12, a lower end plate 13, a cylindrical shell 14, a smoke collecting hood 15 and an air duct pipe 16;

the burner 22, the hollow shell 23, the heat-conducting premixing partition plate 24 and the combustion hole 25;

the heat exchanger 33, the spiral light pipe coil 34, the water outlet 341, the transfer water inlet 342, the lower heat insulation plate 343, the spiral finned tube coil 35, the water inlet 351, the transfer water outlet 352, the smoke blocking disc 356, the transfer joint 36, the water outlet 37, the condensation water discharge pipe 38, the U-shaped heat exchange channel 44, the inlet section 441, the outlet section 442, the turning section 443, the fan seat 55, the upper heat insulation plate 66 and the condensed water outlet 151.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. In addition, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature for distinguishing between descriptive features, non-sequential, and non-trivial.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 1 to 4, the combustion heat exchange system of the fully premixed condensation wall-hanging furnace comprises a shell 11, a burner 22 and a heat exchanger, wherein the burner 22 is arranged inside the shell 11, and the heat exchanger is arranged on the periphery of the burner 22;

the burner 22 comprises a hollow shell 23 and a heat-conducting premixing partition plate 24, wherein a plurality of burning holes 25 are formed in the outer surface of the hollow shell 23, the heat-conducting premixing partition plate 24 is arranged on the inner wall of the hollow shell 23, and through holes with different diameters are distributed in the middle of the heat-conducting premixing partition plate 24;

the heat exchanger comprises spiral light pipe coils 34 and spiral finned pipe coils 35, pipes between the spiral light pipe coils 34 are tightly sealed, and the spiral finned pipe coils 35 are arranged on the periphery of the spiral light pipe coils 34.

The burner port 25 cooperates heat conduction and mixes baffle 24 in advance, and the centre of heat conduction and mix baffle 24 distributes and have different diameter through-holes, when the gas is at combustor 22 surface combustion, the heat preheats the mixed gas that gets into in hollow shell 23 along heat conduction and mix baffle 24 in advance, can reduce the surface thermal stress concentration degree of combustor 22, and the mixed gas passes through different diameter through-holes on the heat conduction mixes baffle 24 in advance, utilize the difference of air velocity behind the hole, enable the mixed gas further to mix, reach better mixed effect, can improve combustion effect and stability.

In the combustion heat exchange system of the fully premixed condensation wall-hanging stove in the embodiment, the channel between the spiral light pipe coil 34 and the hollow shell 23 and the channel between the spiral light pipe coil 34 and the spiral finned tube coil 35 are matched to form the U-shaped heat exchange channel 44.

Wherein the U-shaped heat exchange channel 44 comprises an inlet section 441, an outlet section 442 and a turning section 443, the inlet section 441 being located close to the burner 22; the outlet section 442 is located close to the inner wall of the housing 11; one end of the turning section 443 is communicated with one end of the inlet section 441, and the other end of the turning section 443 is communicated with one end of the outlet section 442.

The spiral light pipe coil 34 and the shell 11 jointly enclose to form a U-shaped heat exchange channel 44; the spiral finned tube coil 35 is arranged at an outlet section 442 in the U-shaped heat exchange channel 44, the inner side of the spiral finned tube coil 34 is arranged at an inlet section 441 in the U-shaped heat exchange channel 44, and the outer side of the spiral finned tube coil is arranged at the outlet section 442; however, the high-temperature flue gas output by the combustor 22 can flow along the inner side wall of the spiral light pipe coil 34 to perform condensation heat exchange with the spiral light pipe coil 34, and then perform condensation heat exchange with the outer side wall of the spiral light pipe coil 34 and the spiral finned tube coil 35, so that the integral structure plays a role in centralized diversion of the high-temperature flue gas, the high-temperature flue gas is favorably and fully contacted with the spiral light pipe coil 34 and the spiral finned tube coil 35, and the heat exchange performance is greatly optimized; and the service life can be effectively prolonged, the sufficient combustion is achieved to reduce the emission, the combustion efficiency is improved, the heat exchange effect is enhanced, and the anti-blocking effect is achieved.

The combustion heat exchange system of the fully premixed condensing wall-hanging furnace in some embodiments, wherein the outer shell 11 further comprises an upper end plate 12, an upper heat insulation plate 66, a lower end plate 13, a lower heat insulation plate 343, a smoke baffle disc 356, a cylindrical shell 14, a smoke collecting hood 15 and an air duct pipe 16;

the upper end plate 12 is arranged at the top of the heat exchanger, and the lower end plate 13 is arranged at the bottom of the heat exchanger.

The top of the cylindrical shell 14 is connected with the upper end plate 12, and the bottom of the cylindrical shell 14 is connected with the lower end plate 13; the upper heat insulation plate 66 is fixed on the upper end plate 12, and the upper end plate 12 is provided with a connector for mounting an ignition needle, a flame feedback needle and a fan.

The fume collecting hood 15 is connected with one side of the lower end plate 13, and one side of the fume collecting hood 15 is communicated with the air duct pipe 16; the fume collecting hood 15 is used for collecting fume and collecting condensed water dropped in the operation process of the spiral light pipe coil 34 and the spiral finned tube coil 35.

The fume collecting hood 15 is provided with a water discharge port 37; the lower heat insulation plate 343 is fixed on the smoke baffle disc 356; the other side of the lower end plate 13 is provided with a boss for supporting the smoke blocking plate 356, the spiral light pipe coil pipe 34 and the spiral finned tube coil pipe 35; the smoke baffle 356 is fixed below the spiral light pipe coil 34 for receiving the condensed water and preventing the high temperature smoke from being discharged from below the spiral light pipe coil 34.

The lower heat insulation plate 343 is fixed on the smoke blocking disc 356, and the smoke blocking disc 356 is fixed below the spiral finned tube coil 35 in a welding manner, and is used for receiving condensed water and preventing high-temperature flue gas from being discharged below the spiral finned tube coil 35.

During heat exchange, high-temperature flue gas is output from the surface combustion holes 25 of the hollow shell 23 of the burner 22, enters the spiral light pipe coil 34 and the smoke blocking disc 356 to form a hollow space (a channel shown by an arrow in fig. 2), then flows along the channel formed by the spiral light pipe coil 34 and the burner 22, and enters the heat exchange working medium such as water of the spiral fin pipe coil 35 in the U-shaped heat exchange channel 44 for heat exchange. Most of the heat of the high-temperature flue gas exchanges heat with the heat exchanger 33, and then the flue gas is output from the channel and enters another channel (a channel shown by an arrow in fig. 2) formed by the smoke collecting cover 15 and the flue, and then the flue gas is output from the other end of the channel to the smoke outlet of the housing 11. The design can effectively utilize the flue gas output by the combustor 22 to realize high-energy-efficiency condensation heat exchange. Can ensure that the water and the flue gas in the heat exchanger 33 in the whole heat exchange process are fully crossed and subjected to counter-convection heat exchange, and is beneficial to maintaining a relatively stable heat exchange gradient, and the internal and external working media in the heat exchanger 33 exchange heat in a relatively large temperature difference convection environment.

Preferably, one end of the spiral light pipe coil 34 is provided with a water outlet 341, and the other end of the spiral light pipe coil 34 is provided with a transit water inlet 342; one end of the spiral finned tube coil 35 is provided with a water inlet 351, and the other end of the spiral finned tube coil 35 is provided with a transfer water outlet 352; the relay water inlet 342 is communicated with the relay water outlet 352.

Water can enter from the water inlet 351 of the spiral finned tube coil 35 to exchange heat with the flue gas, then flows into the transfer water inlet 342 through the transfer water outlet 352 to enter the spiral light tube coil 34 to exchange heat with the flue gas again, and then flows out from the water outlet 341 of the spiral light tube coil 34; the design enables the structure of the heat exchanger 33 to be more perfect, the smoke output by the combustor 22 can be effectively utilized to realize high-energy-efficiency condensation heat exchange, the water solution and the smoke in the heat exchanger 33 can be ensured to be fully crossed and reversely convected for heat exchange in the whole heat exchange process, a stable heat exchange gradient can be maintained, and the heat exchange of the working medium inside and outside the heat exchanger 33 can be realized in a large-temperature-difference convection environment.

The heat exchanger further comprises a transfer joint 36, and the transfer joint 36 communicates the transfer water inlet 342 with the transfer water outlet 352.

Therefore, the transfer water inlet 342 and the transfer water outlet 352 can be connected in parallel, and heat exchange work can be better carried out.

In the present application, the adjacent heat-conducting premixing partition plates 24 are arranged at a predetermined interval, and the through holes of the adjacent heat-conducting premixing partition plates 24 are distributed in a staggered manner.

Due to the design, the mixed gas passes through the through holes with different diameters on the heat-conducting premixing partition plate 24, and the mixed gas can be further mixed by utilizing the different air flow speeds after passing through the holes, so that a better mixing effect is achieved, and the combustion effect and the stability can be improved.

In the heat exchanger of the fully premixed condensation wall-mounted boiler in the embodiment, the shell 11 further comprises a fan base 55, the fan base 55 is arranged at the top of the shell 11, meanwhile, the fan base 55 is connected and sealed with the upper end plate 12, and the inlet end of the burner 22 is fixed and sealed between the fan base 55 and the upper end plate 12 and used for feeding mixed gas into the hollow shell 23; due to the design of the fan base 55, when the burner 22 is in operation, the air and gas mixture can be better fed into the hollow shell 23 through the fan base 55 and flows out through the combustion holes 25, so that the flame can be burned on the surface of the burner 22.

Specifically, the smoke trap 356 is provided with a drain port 37 and is connected with a condensate drain pipe 38 which passes through the bottom of the smoke collecting hood 15 and protrudes outside the smoke collecting hood 15.

The condensation drainage pipeline 38 is communicated with the water outlet 37, the fume collecting cover 15 is provided with a hole site for penetrating the condensation drainage pipeline 38, the outer wall of the condensation drainage pipeline 38 and the hole site penetrating the fume collecting cover 15 are provided with a sealing structure, and the phenomenon that condensed water in the fume collecting cover 15 seeps out from the connection seam of the condensation drainage pipeline 38 and the hole site penetrating the fume collecting cover 15 is avoided. The utility model discloses a little water stain problem can effectively be solved to this kind of design in the inner bottom of shell 11, also can avoid water stain to stretch some parts that set up in shell 11 bottom, thereby improve the life of whole equipment.

Preferably, the spiral light pipe coil 34 is a circular smooth pipe, and the spiral finned pipe coil 35 is of a spiral structure; the fin-to-fin spacing in the spiral finned tube coil 35 is controlled to be between 1.5 and 3.0 mm.

Due to the design, the heating area is beneficial to improving the heat exchange efficiency, the condensation enhanced heat exchange effect is good, the condensation heat exchange efficiency can be effectively improved, the fin gaps are large, and scaling and blocking are not easy to occur.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a full premix condensation hanging stove burning heat transfer system which characterized in that: the combustor comprises a shell, a combustor and a heat exchanger, wherein the combustor is arranged in the shell, and the heat exchanger is arranged on the periphery of the combustor;

the combustor comprises a hollow shell and a heat-conducting premixing partition plate, wherein a plurality of combustion holes are formed in the outer surface of the hollow shell, the heat-conducting premixing partition plate is arranged on the inner wall of the hollow shell, and through holes with different diameters are distributed in the middle of the heat-conducting premixing partition plate;

the heat exchanger comprises a spiral light pipe coil and a spiral finned tube coil, pipes between the spiral light pipe coils are tightly attached and sealed, and the spiral finned tube coil is arranged on the periphery of the spiral light pipe coil.

2. The combustion heat exchange system of the full-premix condensation wall-hanging stove is characterized in that: and a channel between the spiral light pipe coil and the hollow shell and a channel between the spiral light pipe coil and the spiral finned tube coil are matched to form a U-shaped heat exchange channel.

3. The combustion heat exchange system of the full-premix condensation wall-hanging stove is characterized in that: the U-shaped heat exchange channel comprises an inlet section, an outlet section and a turning section, and the inlet section is positioned close to the combustor; the outlet section is positioned close to the inner wall of the shell; one end of the turning section is communicated with one end of the inlet section, and the other end of the turning section is communicated with one end of the outlet section.

4. The combustion heat exchange system of the full-premix condensation wall-hanging stove is characterized in that: the shell also comprises an upper end plate, an upper heat insulation plate, a lower end plate, a lower heat insulation plate, a smoke blocking disc, a cylindrical shell, a smoke collecting hood and a wind channel pipe;

the upper end plate is arranged at the top of the heat exchanger, and a connector for mounting an ignition needle, a flame feedback needle and a fan is arranged on the upper end plate;

the lower end plate is arranged at the bottom of the heat exchanger;

the top of the cylindrical shell is connected with the upper end plate, and the bottom of the cylindrical shell is connected with the lower end plate;

the upper heat insulation plate is fixed on the upper end plate;

the smoke collecting cover is connected with one side of the lower end plate, and one side of the smoke collecting cover is communicated with the air duct pipe;

the fume collecting hood is used for collecting fume and collecting condensed water dropped in the operation process of the spiral light pipe coil and the spiral finned pipe coil; the fume collecting hood is provided with a water outlet;

the lower heat insulation plate is fixed on the smoke blocking disc;

the lower end plate is provided with a boss for supporting the smoke blocking disc, the spiral light pipe coil and the spiral finned tube coil;

the smoke blocking disc is fixed below the spiral light pipe coil and used for receiving and collecting condensed water dropping in the operation process of the spiral light pipe coil and preventing high-temperature smoke after combustion from flowing out of the lower portion of the spiral light pipe coil.

5. The combustion heat exchange system of the full-premix condensation wall-hanging stove is characterized in that: one end of the spiral light pipe coil is provided with a water outlet, and the other end of the spiral light pipe coil is provided with a transfer water inlet; one end of the spiral finned tube coil is provided with a water inlet, and the other end of the spiral finned tube coil is provided with a transfer water outlet; the transfer water inlet is communicated with the transfer water outlet.

6. The combustion heat exchange system of the full-premix condensation wall-hanging stove according to claim 5, characterized in that: the heat exchanger also comprises a transfer joint, and the transfer water inlet is communicated with the transfer water outlet through the transfer joint.

7. The combustion heat exchange system of the full-premix condensation wall-hanging stove is characterized in that: the adjacent heat-conducting premixing partition plates are arranged according to a preset spacing distance, and the through holes on the adjacent heat-conducting premixing partition plates are distributed in a staggered mode.

8. The combustion heat exchange system of the full-premix condensation wall-hanging stove is characterized in that: the shell further comprises a fan base, and the fan base is arranged at the top of the shell and used for sending mixed gas into the hollow shell.

9. The combustion heat exchange system of the full-premix condensation wall-hanging stove is characterized in that: the smoke blocking disc is provided with a water outlet and is connected with a condensed water drainage pipeline, and the condensed water drainage pipeline penetrates through the bottom of the smoke collecting hood and extends out of the smoke collecting hood.

10. The combustion heat exchange system of the full-premix condensation wall-hanging stove according to claim 9, characterized in that: the spiral light pipe coil is a round smooth pipe, and the spiral finned pipe coil is of a spiral structure; the distance between fins in the spiral finned tube coil is controlled to be 1.5-3.0 mm.