Heat exchange device near the burner smoke outlet

Abstract

The utility model relates to the technical field of heating equipment, and is a heat exchange device near the smoke outlet of a burner, which includes a burner, a smoke exhaust pipe, a water-cooled shell, a water-cooled outer tube and a heat exchange chamber. A water-cooled shell is provided on the outer side of the upper part of the burner, a smoke exhaust pipe located above the water-cooled shell is provided on the upper side of the burner, a water-cooled outer tube is provided on the outer side of the smoke exhaust pipe, and the lower end of the water-cooled outer tube is fixedly installed on the upper side of the water-cooled shell and can be connected with the inside of the water-cooled shell. The utility model has a reasonable and compact structure and is easy to use. The smoke passes through the smoke exhaust pipe, the smoke inlet cone and the first heat exchange pipe to heat the water in the water-cooled shell, the water-cooled outer tube and the heat exchange outer tube; by setting the smoke inlet cone, water can pass through the area between the water-cooled outer tube and the smoke exhaust pipe; by setting the left sealing plate and the right sealing plate, smoke and water separation is achieved to avoid direct contact between water and smoke, and it has the characteristics of stability, reliability and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment and is a heat exchange device near the smoke outlet of a burner. Background Art

[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and life, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. Among them, the boiler that can provide hot water is called a hot water boiler, which is mainly used for domestic water and domestic heating, and it is also used in a small amount in industrial production.

[0003] A Chinese patent document with announcement number CN202630410U discloses a high-efficiency and energy-saving hot blast furnace, which consists of a furnace body, a water tank, a heat collecting box, a furnace, an induced draft fan, a smoke exhaust fan and a heat dissipation box, and is characterized in that: a water tank is provided on the lower left side of the furnace body, a furnace is provided in the middle of the water tank, a coal adding port is provided on the left side of the water tank, a hot water outlet is provided on the front upper part of the water tank body, a circulating water inlet is provided on the rear side of the water tank, a cold water injection port is provided on the lower right part of the water tank, a pressure relief port is provided on the upper side of the water tank, a pressure relief pipe is installed on the pressure relief port, a first heat collecting box is provided on the upper end of the water tank, the first heat collecting box is composed of 2-20 rows of vertical hot air steel pipes, the lower pipe mouth of the hot air steel pipe is inlaid and welded in the top layer of the water tank, flush with the bottom of the inner wall of the top layer of the water tank, and the upper pipe mouth is inlaid and welded in the box body of the second heat collecting box, and the second heat collecting box is located at the At the upper end of the 1st collector box, 3-25 rows of hot air pipes are arranged horizontally in the box body, and a dust removal port is provided at the front lower end of the box body. The 3rd collector box is provided on the right side of the 2nd collector box, and the 3rd collector box is arranged on the right side of the water tank and the 1st and 2nd collector boxes. The 3rd collector box is provided with a left collector chamber, a middle collector chamber, and a right collector chamber. The left collector chamber, the middle collector chamber, and the right collector chamber are respectively provided with 2-15 rows of collector tubes, which are arranged horizontally and inlaid and welded in the chamber walls on both sides of the left, middle and right collector chambers. A left guide plate is provided on the left side of the middle collector chamber, and a lower airflow diversion channel is provided on the bottom side of the left guide plate. A middle guide plate is provided on the left side of the right collector chamber, and an upper airflow diversion channel is provided on the upper side of the middle guide plate. A right guide plate is provided on the right side of the right collector chamber, and a lower airflow diversion channel is provided on the bottom side of the right guide plate. A 4th collector box is provided on the right side of the right guide plate.

[0004] A Chinese patent document with announcement number CN202166174U discloses a condensing gas water heater with air preheating and a metal fiber burner, characterized in that it consists of an upper and lower part and a muffler; the upper part is a heat exchange box and its connected parts, and the lower part is a water collecting box and its connected parts; the upper part is connected to the muffler by a flange and screws at the air outlet of the air preheater, and the upper and lower parts are connected by flanges and bolts; connected to the upper heat exchange box are four major parts: a smoke exhaust and air preheating system, a spray system, a guide plate, and an explosion-proof pressure relief door. The smoke exhaust and air preheating system is connected to the heat exchange box via flanges and screws, the spray system is connected to the heat exchange box via threaded pipes and nuts, the guide plate is connected to the heat exchange box via screws, and the explosion-proof pressure relief door is connected to the heat exchange box via hinges and elastic locks; connected to the lower water collecting box are a combustion system, a water supply pipe, an overflow pipe, a water outlet pipe, and a sewage pipe, all of which are welded to the water collecting box.

[0005] When an existing boiler is in use, a portion of the smoke pipe used for heat exchange is usually exposed to the air, thereby causing a problem of heat loss. Summary of the invention

[0006] The utility model provides a burner smoke proximal end heat exchange device, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem of heat loss caused by the existing boiler smoke exhaust pipe being exposed to the air.

[0007] The technical solution of the utility model is achieved through the following measures: a heat exchange device for the near-end of the smoke outlet of a burner comprises a burner, a smoke exhaust pipe, a water-cooled shell, a water-cooled outer tube and a heat exchange chamber, a water-cooled shell is arranged on the outer side of the upper part of the burner, a smoke exhaust pipe located above the water-cooled shell is arranged on the upper side of the burner, a water-cooled outer tube is arranged on the outer side of the smoke exhaust pipe, and the lower end of the water-cooled outer tube is fixedly installed on the upper side of the water-cooled shell and can be communicated with the inside of the water-cooled shell; the smoke exhaust pipe comprises a smoke exhaust horizontal pipe, a smoke exhaust elbow and a smoke exhaust vertical pipe fixedly installed together from left to right in sequence, and the heat exchange chamber comprises a heat exchange outer tube, a smoke inlet cone tube, a left sealing plate, a right sealing plate Plate and the first heat exchange tube, a heat exchange outer tube is fixedly installed on the left end of the water-cooled outer tube, a left sealing plate and a right sealing plate are arranged at intervals on the left and right inside the heat exchange outer tube, a smoke inlet cone is fixedly installed between the right sealing plate and the smoke exhaust cross pipe, and the smoke inlet cone is in the shape of a truncated cone with a larger left side and a smaller right side, a plurality of right mounting holes are arranged on the right sealing plate corresponding to the inner side of the smoke inlet cone, a left mounting hole is arranged on the left sealing plate corresponding to each right mounting hole position, and a first heat exchange tube is fixedly installed between the left mounting holes and the right mounting holes at every two corresponding positions; a first water inlet pipe is arranged on the lower side of the heat exchange outer tube corresponding to the right side of the left sealing plate, and a first water outlet pipe is arranged on the outer side of the water-cooled shell.

[0008] The following are further optimizations and / or improvements to the above utility model technical solution:

[0009] The above-mentioned can also include a heat exchange water tank, which includes a main box body, a smoke inlet connecting neck, a smoke outlet connecting neck, a left mounting plate, a right mounting plate, and a second heat exchange tube. A smoke outlet is provided on the lower left side of the main box body, and a smoke inlet is provided on the lower right side of the main box body corresponding to the position of the smoke outlet. A smoke outlet connecting neck is fixedly installed on the outside of the main box body corresponding to the outer position of the smoke outlet, and a smoke inlet connecting neck is fixedly installed on the outside of the main box body corresponding to the outer position of the smoke inlet, and the right end of the smoke inlet connecting neck is fixedly installed together with the left end of the heat exchange outer cylinder; a left mounting plate is fixedly installed in the smoke outlet, and a right mounting plate is fixedly installed in the smoke inlet, and a plurality of left fixing holes are provided on the left mounting plate, and a right fixing hole is provided on the right mounting plate corresponding to the position of each left fixing hole, and a second heat exchange tube is fixedly installed between the left fixing hole and the right fixing hole at every two corresponding positions; a second water inlet pipe, a second water outlet pipe, a return water inlet pipe and a return water outlet pipe are respectively provided on the rear side of the main box body.

[0010] The above may also include a terminal smoke exhaust pipe, the smoke outlet connecting neck and the terminal smoke exhaust pipe are fixedly installed together through a flange connection, the smoke inlet connecting neck and the heat exchange outer tube are fixedly installed together through a flange connection, the heat exchange outer tube and the water cooling outer tube are fixedly installed together through a flange connection, and the smoke inlet cone tube and the smoke exhaust cross pipe are fixedly installed together through a flange connection.

[0011] The above may also include a water pump, a first pipeline is fixedly connected between the first water inlet pipe and the second water outlet pipe, a water pump is arranged on the first pipeline, and a second pipeline is fixedly connected between the first water outlet pipe and the second water inlet pipe.

[0012] The above may also include a drain pipe, an overflow pipe, an additional pipe and a liquid level gauge. A second water inlet pipe and a second water outlet pipe are provided at upper and lower intervals on the right rear side of the main box body, a return water inlet pipe and a return water outlet pipe are provided at upper and lower intervals on the middle rear side of the main box body, an overflow pipe and a drain pipe are provided at upper and lower intervals on the left rear side of the main box body, an external pipe is provided on the upper rear side of the main box body, and a liquid level gauge is provided on the rear side of the main box body.

[0013] The above-mentioned water exchange water tank may also include a heat-insulating layer. The heat-insulating layer is arranged on the outside of the main tank body, and the heat-insulating layer is glass wool, composite silicate, rock wool or aluminum silicate wool.

[0014] The utility model has a reasonable and compact structure and is easy to use. The smoke passes through the smoke exhaust pipe, the smoke inlet cone and the first heat exchange tube to heat the water in the water-cooled shell, the water-cooled outer tube and the heat exchange outer tube; the smoke inlet cone is arranged to enable water to pass through the area between the water-cooled outer tube and the smoke exhaust pipe; the left sealing plate and the right sealing plate are arranged to achieve smoke and water separation to avoid direct contact between water and smoke, and the utility model has the characteristics of stability, reliability and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 It is a schematic diagram of the front cross-sectional structure of embodiments 1 to 6 of the present invention.

[0016] Attached Figure 2For attachment Figure 1 Schematic diagram of the three-dimensional structure.

[0017] Attached Figure 3 For attachment Figure 1 Schematic diagram of the local enlarged structure at point A.

[0018] Attached Figure 4 For attachment Figure 1 Schematic diagram of the local enlarged structure at point B.

[0019] The codes in the accompanying drawings are: 1 is a burner, 2 is a water-cooled shell, 3 is a water-cooled outer pipe, 4 is a smoke exhaust horizontal pipe, 5 is a smoke exhaust elbow, 6 is a smoke exhaust riser, 7 is a heat exchange outer cylinder, 8 is a smoke inlet cone, 9 is a left sealing plate, 10 is a right sealing plate, 11 is a first heat exchange tube, 12 is a first water inlet pipe, 13 is a first water outlet pipe, 14 is a main box body, 15 is a smoke inlet connecting neck, 16 is a smoke outlet connecting neck, 17 is a left mounting plate, 18 is a right mounting plate, 19 is a second heat exchange tube, 20 is a second water inlet pipe, 21 is a second water outlet pipe, 22 is a return water inlet pipe, 23 is a return water outlet pipe, 24 is an insulation layer, 25 is a water pump, 26 is a first pipeline, 27 is a second pipeline, 28 is a drain pipe, 29 is an overflow pipe, 30 is an additional pipe, and 31 is a liquid level meter. DETAILED DESCRIPTION

[0020] The present invention is not limited by the following embodiments, and specific implementation methods can be determined according to the technical solution of the present invention and actual conditions.

[0021] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached manual. Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0022] The present invention will be further described below in conjunction with the embodiments and drawings:

[0023] Embodiment 1: As attached Figure 1 , 2As shown in Figures 3 and 4, the heat exchange device near the smoke outlet of the burner comprises a burner 1, a smoke exhaust pipe, a water-cooled shell 2, a water-cooled outer tube 3 and a heat exchange chamber. A water-cooled shell 2 is arranged on the outer side of the upper part of the burner 1, and a smoke exhaust pipe located above the water-cooled shell 2 is arranged on the upper side of the burner 1. A water-cooled outer tube 3 is arranged on the outer side of the smoke exhaust pipe. The lower end of the water-cooled outer tube 3 is fixedly installed on the upper side of the water-cooled shell 2 and can be connected with the inside of the water-cooled shell 2; the smoke exhaust pipe comprises a smoke exhaust horizontal pipe 4, a smoke exhaust elbow 5 and a smoke exhaust riser 6 which are fixedly installed together from left to right in sequence, the heat exchange chamber comprises a heat exchange outer tube 7, a smoke inlet cone tube 8, a left sealing plate 9, a right sealing plate 10 and a first heat exchange tube 11, and a water-cooled A heat exchange outer tube 7 is fixedly installed on the left end of the outer tube 3, and a left sealing plate 9 and a right sealing plate 10 are arranged at intervals on the left and right inside the heat exchange outer tube 7. A smoke inlet cone 8 is fixedly installed between the right sealing plate 10 and the smoke exhaust cross pipe 4. The smoke inlet cone 8 is a truncated cone with a larger left side and a smaller right side. A plurality of right mounting holes are arranged on the right sealing plate 10 corresponding to the inner side of the smoke inlet cone 8, and a left mounting hole is arranged on the left sealing plate 9 corresponding to each right mounting hole position, and a first heat exchange tube 11 is fixedly installed between the left mounting holes and the right mounting holes at every two corresponding positions; a first water inlet pipe 12 is arranged on the lower side of the heat exchange outer tube 7 corresponding to the right side of the left sealing plate 9, and a first water outlet pipe 13 is arranged on the outer side of the water-cooled shell 2. During use, the flue gas passes through the smoke exhaust pipe, the smoke inlet cone 8 and the first heat exchange tube 11, thereby heating the water in the water-cooled shell 2, the water-cooled outer tube 3 and the heat exchange outer tube 7, and can effectively prevent the smoke exhaust pipe, the smoke inlet cone 8 and the first heat exchange tube 11 from being exposed to the air, causing heat loss; by fixing the water-cooled outer tube 3 and the heat exchange outer tube 7 together, and fixing the right sealing plate 10 and the smoke exhaust cross pipe 4 together through the smoke inlet cone 8, the problem of connecting the first heat exchange tube 11 in the heat exchange bin with the smoke exhaust pipe is effectively solved, and the smoke exhaust pipe and the first heat exchange tube 11 are avoided from being exposed, causing heat to be dissipated into the air, causing heat waste; by setting the smoke inlet cone 8, water can pass through the area between the water-cooled outer tube 3 and the smoke exhaust pipe; by setting the left sealing plate 9 and the right sealing plate 10, smoke and water separation is achieved to avoid direct contact between water and smoke.

[0024] According to actual needs, the above-mentioned burner smoke outlet near-end heat exchange device can be further optimized and / or improved:

[0025] Embodiment 2: As attached Figure 1 , 2, 3, and 4, it also includes a heat exchange tank, which includes a main box body 14, a smoke inlet connection neck 15, a smoke outlet connection neck 16, a left mounting plate 17, a right mounting plate 18, and a second heat exchange tube 19. A smoke outlet is provided on the lower left side of the main box body 14, and a smoke inlet is provided on the lower right side of the main box body 14 corresponding to the position of the smoke outlet. A smoke outlet connection neck 16 is fixedly installed on the outer side of the main box body 14 corresponding to the outer side of the smoke outlet, and a smoke inlet connection neck 15 is fixedly installed on the outer side of the main box body 14 corresponding to the outer side of the smoke inlet. The right end of 15 is fixedly installed with the left end of the heat exchange outer tube 7; the left mounting plate 17 is fixedly installed in the smoke outlet, and the right mounting plate 18 is fixedly installed in the smoke inlet. The left mounting plate 17 is provided with a plurality of left fixing holes, and the right mounting plate 18 corresponding to each left fixing hole position is provided with a right fixing hole, and the second heat exchange tube 19 is fixedly installed between the left fixing holes and the right fixing holes at every two corresponding positions; the rear side of the main box body 14 is respectively provided with a second water inlet pipe 20, a second water outlet pipe 21, a return water inlet pipe 22 and a return water outlet pipe 23. During use, by arranging the second heat exchange tube 19 in the main box body 14, secondary heat exchange of circulating water is realized; by arranging the return water inlet pipe 22 and the return water outlet pipe 23, hot water circulation of the heating network is established; by arranging the smoke inlet connection neck 15 and the smoke outlet connection neck 16, it is convenient to install the main box body 14 and the heat exchange bin.

[0026] Embodiment 3: As attached Figure 1 , 2 , 3, and 4, it also includes a terminal exhaust pipe, the exhaust connection neck 16 and the terminal exhaust pipe are fixedly installed together through a flange connection, the inlet connection neck 15 and the heat exchange outer tube 7 are fixedly installed together through a flange connection, the heat exchange outer tube 7 and the water cooling outer tube 3 are fixedly installed together through a flange connection, and the inlet cone 8 and the exhaust cross pipe 4 are fixedly installed together through a flange connection. During use, the flange connection method is set to facilitate disassembly and assembly.

[0027] Embodiment 4: As attached Figure 1 , 2 , 3, and 4, a water pump 25 is also included. A first pipeline 26 is fixedly connected between the first water inlet pipe 12 and the second water outlet pipe 21. The water pump 25 is arranged on the first pipeline 26. A second pipeline 27 is fixedly connected between the first water outlet pipe 13 and the second water inlet pipe 20. During use, through such an arrangement, the hot water pump 25 in the main box body 14 is pumped into the water-cooled housing 2 to adjust the circulation speed of water.

[0028] Embodiment 5: As attached Figure 1 , 2, 3, and 4, it also includes a drain pipe 28, an overflow pipe 29, an additional pipe 30, and a liquid level gauge 31. The second water inlet pipe 20 and the second water outlet pipe 21 are arranged at intervals at the upper and lower right part of the rear side of the main box body 14, the return water inlet pipe 22 and the return water outlet pipe 23 are arranged at intervals at the upper and lower middle part of the rear side of the main box body 14, the overflow pipe 29 and the drain pipe 28 are arranged at intervals at the upper and lower left part of the rear side of the main box body 14, the additional pipe 30 is arranged at the upper part of the rear side of the main box body 14, and the liquid level gauge 31 is arranged at the rear side of the main box body 14. In use, through such an arrangement, the arrangement of the pipelines at the rear side of the main box body 14 is more reasonable, and it is convenient to display the liquid level of hot water in the main box body 14 and add water, drain water, etc.

[0029] Embodiment 6: As attached Figure 1 , 2 As shown in Figures 3 and 4, the water exchange tank further includes a heat preservation layer 24. The heat preservation layer 24 is provided on the outside of the main tank 14. The heat preservation layer 24 is glass wool, composite silicate, rock wool or aluminum silicate wool. During use, the hot water in the main tank 14 is kept warm by such a setting. The heat preservation layer 24 has a better heat preservation effect by using the existing well-known heat preservation materials, such as glass wool, composite silicate, rock wool or aluminum silicate wool.

[0030] The above technical features respectively constitute various embodiments of the present utility model, which have strong adaptability and implementation effect, and non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A heat exchange device near the smoke outlet of a burner, characterized in that It includes a burner, a smoke exhaust pipe, a water-cooled shell, a water-cooled outer pipe and a heat exchange chamber. A water-cooled shell is provided on the outer side of the upper part of the burner. A smoke exhaust pipe located above the water-cooled shell is provided on the upper side of the burner. A water-cooled outer pipe is provided on the outer side of the smoke exhaust pipe. The lower end of the water-cooled outer pipe is fixedly installed on the upper side of the water-cooled shell and can be connected with the inside of the water-cooled shell. The smoke exhaust pipe includes a smoke exhaust horizontal pipe, a smoke exhaust elbow and a smoke exhaust vertical pipe fixedly installed together from left to right. The heat exchange chamber includes a heat exchange outer tube, a smoke inlet cone tube, a left sealing plate, a right sealing plate and a first heat exchange tube. The left end of the water-cooled outer tube is fixedly installed There is a heat exchange outer cylinder, and a left sealing plate and a right sealing plate are arranged at intervals on the left and right sides of the heat exchange outer cylinder. A smoke inlet cone is fixedly installed between the right sealing plate and the smoke exhaust cross pipe. The smoke inlet cone is a truncated cone with a larger left side and a smaller right side. A plurality of right mounting holes are arranged on the right sealing plate corresponding to the inner side of the smoke inlet cone, and a left mounting hole is arranged on the left sealing plate corresponding to each right mounting hole position, and a first heat exchange tube is fixedly installed between the left mounting holes and the right mounting holes at every two corresponding positions; a first water inlet pipe is arranged on the lower side of the heat exchange outer cylinder corresponding to the right side of the left sealing plate, and a first water outlet pipe is arranged on the outer side of the water-cooled shell.

2. The burner smoke proximal end heat exchange device according to claim 1, characterized in that It also includes a heat exchange tank, which includes a main box body, a smoke inlet connecting neck, a smoke outlet connecting neck, a left mounting plate, a right mounting plate, and a second heat exchange tube. A smoke outlet is provided on the lower left side of the main box body, and a smoke inlet is provided on the lower right side of the main box body corresponding to the position of the smoke outlet. A smoke outlet connecting neck is fixedly installed on the outside of the main box body corresponding to the outer position of the smoke outlet, and a smoke inlet connecting neck is fixedly installed on the outside of the main box body corresponding to the outer position of the smoke inlet, and the right end of the smoke inlet connecting neck is fixedly installed together with the left end of the heat exchange outer cylinder; a left mounting plate is fixedly installed in the smoke outlet, and a right mounting plate is fixedly installed in the smoke inlet, and a plurality of left fixing holes are provided on the left mounting plate, and a right fixing hole is provided on the right mounting plate corresponding to the position of each left fixing hole, and a second heat exchange tube is fixedly installed between the left fixing hole and the right fixing hole at every two corresponding positions; a second water inlet pipe, a second water outlet pipe, a return water inlet pipe and a return water outlet pipe are respectively provided on the rear side of the main box body.

3. The burner smoke proximal end heat exchange device according to claim 2, characterized in that It also includes a terminal smoke exhaust pipe, a smoke outlet connection neck and the terminal smoke exhaust pipe are fixedly installed together through a flange connection, a smoke inlet connection neck and a heat exchange outer tube are fixedly installed together through a flange connection, the heat exchange outer tube and the water cooling outer tube are fixedly installed together through a flange connection, and a smoke inlet cone tube and a smoke exhaust cross pipe are fixedly installed together through a flange connection.

4. The burner smoke outlet proximal end heat exchange device according to claim 2 or 3, characterized in that It also includes a water pump, a first pipeline fixedly connected between the first water inlet pipe and the second water outlet pipe, the first pipeline is provided with a water pump, and a second pipeline fixedly connected between the first water outlet pipe and the second water inlet pipe.

5. The burner smoke outlet near-end heat exchange device according to claim 2 or 3, characterized in that It also includes a drain pipe, an overflow pipe, an additional pipe and a liquid level gauge. A second water inlet pipe and a second water outlet pipe are arranged at upper and lower intervals on the right rear side of the main box body, a return water inlet pipe and a return water outlet pipe are arranged at upper and lower intervals on the middle rear side of the main box body, an overflow pipe and a drain pipe are arranged at upper and lower intervals on the left rear side of the main box body, an external pipe is arranged on the upper rear side of the main box body, and a liquid level gauge is arranged on the rear side of the main box body.

6. The burner smoke outlet proximal heat exchange device according to claim 4, characterized in that It also includes a drain pipe, an overflow pipe, an additional pipe and a liquid level gauge. A second water inlet pipe and a second water outlet pipe are arranged at upper and lower intervals on the right rear side of the main box body, a return water inlet pipe and a return water outlet pipe are arranged at upper and lower intervals on the middle rear side of the main box body, an overflow pipe and a drain pipe are arranged at upper and lower intervals on the left rear side of the main box body, an external pipe is arranged on the upper rear side of the main box body, and a liquid level gauge is arranged on the rear side of the main box body.

7. The burner smoke outlet proximal end heat exchange device according to claim 2, 3 or 6, characterized in that The water exchange tank also includes an insulation layer. The outer side of the main tank body is provided with an insulation layer, and the insulation layer is glass wool or composite silicate or rock wool or aluminum silicate wool.

8. The burner smoke outlet proximal heat exchange device according to claim 4, characterized in that The water exchange tank also includes an insulation layer. The outer side of the main tank body is provided with an insulation layer, and the insulation layer is glass wool or composite silicate or rock wool or aluminum silicate wool.

9. The burner smoke outlet proximal heat exchange device according to claim 5, characterized in that The water exchange tank also includes a heat-insulating layer. The outside of the main tank body is provided with a heat-insulating layer, and the heat-insulating layer is glass wool, composite silicate, rock wool or aluminum silicate wool.

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