Firewood and charcoal condensing furnace

Abstract

The invention provides a firewood and charcoal condensing furnace, and relates to the field of heating equipment. Comprising a first flue and a first water cavity; the second temperature return pipe comprises a second flue and a second water cavity; horizontally placed condensation pipes are detachably connected into the first condensation box, the second condensation box and the third condensation box, and the first condensation pipe, the second condensation pipe and the third condensation pipe are in one-to-one correspondence; an annular water cavity is formed in the side wall of the boiler body, the interior is vertically divided into a water tank and a combustion chamber through a water stop plate, and a cover plate is arranged at the top. The exhaust chimney penetrates through the cover plate and then is sequentially communicated with the first condensing box, the first flue, the second condensing box, the third condensing box and the second flue; a coil pipe is arranged in the water tank, a water inlet of the coil pipe is externally connected with heat dissipation equipment, and a water outlet of the coil pipe is sequentially connected with the first condensation pipe, the first water cavity, the second condensation pipe, the third condensation pipe, the flat water tank, the second water cavity and the heat dissipation equipment. Heat can be efficiently recycled, so that exhausted flue gas reaches a low-temperature state; and transparent pollution-free emission is realized.

Description

Technical Field

[0001] The invention relates to the field of heating equipment, in particular to a charcoal condensing furnace. Background Art

[0002] In rural areas in the north where central heating is not available, combustion stoves are used for heating in winter. In order to separate people from stoves, combustion stoves and water heating equipment are often used in combination to avoid problems such as indoor hypoxia and carbon monoxide poisoning.

[0003] The existing invention patent CN118009361A discloses a heating furnace, including a furnace body, the side wall of which is connected by an inner shell and an outer shell to form an annular water cavity, a water baffle is provided in the furnace body, a water tank is formed with the upper part of the water baffle and the inner wall of the inner shell, and a combustion chamber is formed with the lower part of the water baffle and the inner wall of the inner shell; a feed port connected to the combustion chamber is provided on one side of the furnace body, a furnace bridge is provided at the bottom of the furnace body, and a coil is built in the furnace bridge; the water baffle is provided with a smoke exhaust chimney connected to the combustion chamber; the outer shell is provided with a plurality of water outlets; a cover body, which is provided at the top of the furnace body, and is provided with a water inlet hole and a reflux hole; a first reheating pipe, a second reheating pipe, and an outdoor reheating cap are connected in sequence. It can effectively absorb the heat radiated laterally in the furnace and the heat lost during the smoke exhaust process.

[0004] However, the heat utilization rate of existing heating furnaces and the flue gas purification effect of the smoke exhaust process still need to be improved. Summary of the invention

[0005] The purpose of the present invention is to provide a charcoal condensing furnace, which can heat water multiple times, efficiently recycle and utilize heat, achieve 90% heat utilization, further improve heat utilization rate, and make the exhausted flue gas reach a low temperature state; and it can filter and discharge it during the exhaust process, which can effectively reduce the impact of flue gas on the environment and achieve transparent and pollution-free emission.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A charcoal condensing furnace comprises a furnace body and a first condensing tank, a first temperature return pipe, a second condensing tank, a third condensing tank and a flat water tank which are sequentially arranged above the furnace body, wherein one side of the flat water tank is connected to a second temperature return pipe;

[0008] The first temperature return pipe is placed vertically and includes a first flue and a first water cavity; the second temperature return pipe is placed horizontally and includes a second flue and a second water cavity;

[0009] The first condensation box, the second condensation box and the third condensation box can all be detachably connected with horizontally placed condensation tubes, and they correspond one to one to the first condensation tube, the second condensation tube and the third condensation tube respectively;

[0010] The side wall of the furnace body is provided with a hollow annular water cavity, the interior of the furnace body is divided into a water tank and a combustion chamber by a water baffle plate, and a cover plate is provided on the top of the furnace body; the water baffle plate is provided with a smoke exhaust chimney connected to the combustion chamber, and the smoke exhaust chimney passes through the cover plate and is connected to the first condensation box, the first flue, the second condensation box, the third condensation box and the second flue in sequence;

[0011] The water tank is connected to the annular water cavity, and a coil is arranged in the water tank. The water inlet of the coil passes through the cover plate and is connected to an external heat dissipation device. The water outlet of the coil passes through the cover plate and is sequentially connected to the first condenser, the first water cavity, the second condenser, the third condenser, the flat water tank, the second water cavity and the heat dissipation device.

[0012] Furthermore, in the present invention, the bottom and the top of the first condensation box and the second condensation box are both provided with smoke holes for smoke to flow through;

[0013] The first condensation tube and the second condensation tube are both opposite to the smoke through hole, and there is a gap between the horizontal sides of the first condensation tube and the side wall of the first condensation box, and there is a gap between the horizontal sides of the second condensation tube and the side wall of the second condensation box;

[0014] Two ends of the first condenser tube are mounted on two opposite side walls of the first condenser box through mounting plates, and two ends of the second condenser tube are mounted on two opposite side walls of the second condenser box through mounting plates.

[0015] Furthermore, in the present invention, a smoke inlet is provided at the bottom of the third condenser, and a smoke outlet is provided at one side of the third condenser; the smoke outlet is connected to one end of the second temperature return pipe;

[0016] The third condensation tubes are provided with three, and the three third condensation tubes are placed in an inverted U shape, and the U-shaped openings thereof are opposite to the flue gas inlet; the three third condensation tubes are respectively installed in the third condensation box through the installation plates;

[0017] The flat water tank is riveted and installed on the top of the third condensation tank.

[0018] Furthermore, in the present invention, the first condensation box, the second condensation box and the third condensation box are all rectangular, and the sizes of the first condensation box and the second condensation box are smaller than the size of the third condensation box, and the size of the first condensation box is smaller than or equal to the size of the second condensation box.

[0019] Furthermore, in the present invention, the first flue is axially arranged to penetrate the first temperature return pipe; the first water cavity is arranged around the outside of the first flue, and the side walls of the first water cavity are respectively provided with a first water inlet and a first water outlet;

[0020] The second flue is axially penetrated along the second temperature return pipe; the second water cavity is arranged around the outside of the second flue, and the side walls of the second water cavity are respectively provided with a second water inlet and a second water outlet.

[0021] Furthermore, in the present invention, a pressure gauge and a pressure relief valve are installed on the side wall of the first temperature return pipe.

[0022] Furthermore, in the present invention, a filter device is connected to one end of the smoke exhaust of the second temperature return pipe.

[0023] Furthermore, in the present invention, a plurality of heat exchange holes communicating with the water tank are circumferentially arranged on the inner wall of the annular water chamber.

[0024] Furthermore, in the present invention, the outer wall of the annular water cavity is also provided with an overflow hole, a water replenishment hole and a sewage discharge hole, wherein the overflow hole and the water replenishment hole are close to the top of the outer wall, and the sewage discharge hole is close to the bottom of the outer wall.

[0025] Furthermore, in the present invention, a base is provided at the bottom of the furnace body, a grille is provided near the top of the base, and the furnace body is installed on the grille; an ash box is slidably provided on one side of the base, and the ash box is directly below the grille.

[0026] The present invention has at least the following advantages or beneficial effects:

[0027] The present invention arranges a first condensation box, a first temperature return pipe, a second condensation box, a third condensation box and a flat water tank in sequence above the furnace body, a second temperature return pipe is connected to one side of the flat water tank, the first temperature return pipe is placed vertically, and includes a first flue and a first water cavity; the second temperature return pipe is placed horizontally, and includes a second flue and a second water cavity; the first condensation box, the second condensation box and the third condensation box are all detachably connected with horizontally placed condensation pipes, and correspond one to one to the first condensation pipe, the second condensation pipe and the third condensation pipe respectively; a hollow annular water cavity is arranged on the side wall of the furnace body, the interior of the furnace body is divided into a water tank and a combustion chamber by a baffle plate, and a cover plate is arranged on the top of the furnace body; the baffle plate is provided with a smoke exhaust chimney connected to the combustion chamber, and the After passing through the cover plate, the smoke exhaust chimney is connected with the first condensation box, the first flue, the second condensation box, the third condensation box and the second flue in sequence, so that the high-temperature smoke generated by combustion is firstly recovered through the first condensation box after being discharged from the smoke exhaust chimney, and then the lateral radiation heat generated by the smoke exhaust is recovered through the first reheating pipe, and then the upward heat is recovered through the second condensation box and the third condensation box, and finally the heat is discharged after the last recovery through the second reheating pipe, which greatly reduces the temperature of the high-temperature smoke and makes it discharged at a low temperature, and multiple horizontally placed condensation tubes can filter the carbon deposits in the smoke and filter and discharge the exhaust smoke, which can effectively reduce the impact of the smoke on the environment and achieve transparent and pollution-free emission. The water tank is connected to the annular water cavity, a coil is arranged in the water tank, the water inlet of the coil passes through the cover plate and is connected to an external heat dissipation device, the water outlet of the coil passes through the cover plate and is sequentially connected to the first condenser, the first water cavity, the second condenser, the third condenser, the flat water tank, the second water cavity and the heat dissipation device. Through the above structure, water is heated multiple times during the smoke exhaust process and recycled, which can improve the heat utilization rate compared with the existing heating equipment and achieve 90% heat utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the overall explosion structure of a charcoal condensing furnace provided in an embodiment of the present application;

[0030] Figure 2 A cross-sectional view of a third condensation box provided in an embodiment of the present application;

[0031] Figure 3 A cross-sectional view of the first temperature regeneration tube provided in an embodiment of the present application.

[0032] Icons: 100-furnace body, 110-inner shell, 111-heat exchange hole, 120-outer shell, 121-drain hole, 122-overflow hole, 130-annular water chamber, 140-water baffle, 150-base, 151-grid, 152-ash box, 160-furnace bridge, 170-exhaust chimney, 180-furnace door, 190-cover, 200-flat water tank, 300-first temperature return pipe, 310-first flue, 320-first water chamber, 321-first water inlet, 322-first water outlet, 400-second temperature return pipe, 500-coil, 600-first condensation box, 610-first condensation pipe, 700-second condensation box, 710-second condensation pipe, 800-third condensation box, 810-third condensation pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example

[0036] Please refer to Figure 1-Figure 3 , which is a schematic diagram of the structure of a charcoal condensing furnace in an embodiment of the present invention;

[0037] The present embodiment provides a charcoal condensing furnace, which includes a furnace body 100 and a first condensing tank 600, a first temperature return pipe 300, a second condensing tank 700, a third condensing tank 800 and a flat water tank 200 which are sequentially arranged above the furnace body 100, and a second temperature return pipe 400 is connected to one side of the flat water tank 200;

[0038] The first temperature return pipe 300 is placed vertically and includes a first flue 310 and a first water chamber 320; the second temperature return pipe 400 is placed horizontally and includes a second flue and a second water chamber;

[0039] The first condensation box 600, the second condensation box 700 and the third condensation box 800 are all detachably connected with horizontally placed condensation tubes, and they correspond to the first condensation tube 610, the second condensation tube 710 and the third condensation tube 810 respectively;

[0040] A hollow annular water cavity 130 is provided on the side wall of the furnace body 100. The interior of the furnace body 100 is divided into a water tank and a combustion chamber by a water baffle 140. A cover plate 190 is provided on the top of the furnace body 100. The water baffle 140 is provided with a smoke exhaust chimney 170 connected to the combustion chamber. The smoke exhaust chimney 170 passes through the cover plate 190 and is connected to the first condensation box 600, the first flue 310, the second condensation box 700, the third condensation box 800 and the second flue in sequence.

[0041] The water tank is connected to the annular water cavity 130, and a coil 500 is provided in the water tank. The water inlet of the coil 500 passes through the cover plate 190 and is connected to an external heat dissipation device. The water outlet of the coil 500 passes through the cover plate 190 and is connected in sequence to the first condenser 610, the first water cavity 320, the second condenser 710, the third condenser 810, the flat water tank 200, the second water cavity and the heat dissipation device.

[0042] Next, a wood charcoal condensing furnace according to this exemplary embodiment will be further described.

[0043] In some embodiments of the present application, the side wall of the furnace body 100 is connected by the inner shell 110 and the outer shell 120 to form a hollow annular water cavity 130, and the bottom of the inner shell 110 and the outer shell 120 are welded with a bottom plate, so that the bottom of the annular water cavity 130 forms a seamless and leak-free state. A water baffle 140 is provided in the furnace body 100, and the upper part of the water baffle 140 and the inner wall of the inner shell 110 form a water tank, and the lower part of the water baffle 140 and the inner wall of the inner shell 110 form a combustion chamber; a feed port connected to the combustion chamber is opened on one side of the furnace body 100, and connecting plates are provided above and below the feed port and welded to the inner shell 110 and the outer shell 120, so that the inner shell 110 and the outer shell 120 are seamless and leak-free, and the area of ​​the feed port is reduced, thereby reducing the heat loss when the fuel is burned. A furnace bridge 160 is provided at the bottom of the furnace body 100, and the furnace bridge 160 is used to support the fuel and filter the ash. The water baffle 140 is provided with a smoke exhaust chimney 170 connected to the combustion chamber, and the smoke exhaust chimney 170 extends upward for exhausting smoke. A cover plate 190 is provided on the top of the furnace body 100, and the smoke exhaust chimney 170 extends upward through the cover plate 190, and the cover plate 190 covers the top of the furnace body 100. Under the action of the 360-degree annular furnace body 100, the heat generated by the combustion of wood and coal in the combustion chamber is transferred to the medium water through the annular water cavity 130 and the water tank, and is recovered through the medium water, that is, the heat heats the water in the 360-degree surrounding water in the annular water cavity 130 and the water in the water tank on the top.

[0044] In some embodiments of the present application, the furnace body 100 is sequentially connected with a first condensation tank 600, a first temperature return pipe 300, a second condensation tank 700, a third condensation tank 800 and a flat water tank 200, and one side of the flat water tank 200 is connected with a second temperature return pipe 400. The first temperature return pipe 300 is placed vertically and includes a first flue 310 and a first water chamber 320 for vertical smoke exhaust and heat recovery. The second temperature return pipe 400 is placed horizontally and includes a second flue and a second water chamber for finally discharging smoke horizontally out of the room and absorbing the final heat of the smoke. The first condensation box 600, the second condensation box 700 and the third condensation box 800 are all detachably connected with horizontally placed condensation tubes, which correspond to the first condensation tube 610, the second condensation tube 710 and the third condensation tube 810 respectively. The condensation tubes in the three condensation boxes are all serpentine and placed horizontally. They can filter and discharge the exhaust smoke rising upwards while absorbing and utilizing heat, and the detachable connection method allows them to be disassembled for cleaning or replacement.

[0045] In some embodiments of the present application, the water tank is connected to the annular water cavity 130, and a coil 500 is provided in the water tank. The coil 500 can be placed directly in the water tank or can be detachably connected to the water tank. The water inlet of the coil 500 passes through the cover plate 190 and is connected to an external heat dissipation device, that is, the cooling water after the heat dissipation device is cooled is sent to the coil 500. During the heating process, the water in the water tank also heats the water in the coil 500. Under the action of the circulating pump, the water in the coil 500 carries the heat to the next heating process. The water outlet of the coil 500 passes through the cover plate 190 and is connected to the first condenser 610, the first water cavity 320, the second condenser 710, the third condenser 810, the flat water tank 200, the second water cavity and the heat dissipation device in sequence.

[0046] That is, the water in the coil 500 is heated and then sent to the first condenser 610. When the water flows through the first condenser 610 in a serpentine shape, it takes away the heat of the high-temperature flue gas on the first condenser 610 and cools the first condenser 610. During the operation, the first condenser 610 can not only recover heat, but its fins can also filter carbon deposits, thereby achieving triple heating. Under the action of the circulating pump, the water carrying heat is transported to the first temperature return pipe 300. The height of the first temperature return pipe 300 is proportional to the recovery rate of the transverse radiation heat. When the exhaust heat passes through the first flue 310 of the first temperature return pipe 300, it will generate transverse radiation heat, which is absorbed by the water flowing through the first water chamber 320, thereby achieving quadruple heating. Under the action of the circulation pump, the water carrying heat is transported to the second condensation tank 700. In the process of serpentine flow through the second condensation tube 710, the heat of the flue gas absorbed by the second condensation tube 710 is taken away, and the second condensation tube 710 is cooled down. During the operation of the second condensation tube 710, not only can the heat be recovered, but its fins can also filter carbon deposits, thus achieving five-fold heating. Under the action of the circulation pump, the water carrying heat is transported to the third condensation tank 800 at the top. In the process of serpentine flow through the third condensation tube 810, the heat of the flue gas absorbed by the third condensation tube 810 is taken away, and the third condensation tube 810 is cooled down. During the operation of the third condensation tube 810, not only can the heat be recovered, but its fins can also filter carbon deposits, thus achieving six-fold heating. Under the action of the circulation pump, the water carrying the six-fold heating enters the flat water tank 200 at the upper end of the third condensation tank 800, and takes away the heat at the bottom of the flat water tank 200, thus achieving seven-fold heating. Under the action of the circulation pump, the water with seven times of heating enters the second temperature return pipe 400 and is heated eight times. The heat is finally brought into the heat dissipation device for heat dissipation along with the flowing water. The above structural design realizes the eight-fold heating and recycling of the medium water, achieving 90% heat utilization, and finally sent to the heat dissipation device for heat dissipation and then sent to the eight-fold heating device for circulation flow heating and reuse.

[0047] In some embodiments of the present application, the exhaust chimney 170 passes through the cover plate 190 and is connected to the first condenser box 600, the first flue 310, the second condenser box 700, the third condenser box 800 and the second flue in sequence, that is, the high-temperature flue gas first passes through the first condenser box 600, and the first condenser tube 610 recovers the heat rising upward. In the second step, when the exhaust heat passes through the first temperature return tube 300, its first water cavity 320 recovers the lateral radiation heat generated by the exhaust. In the third step, when the exhaust heat passes through the second condenser box 700, the heat rising upward is recovered again. In the fourth step, the exhaust heat enters the third condenser box 800, and a larger amount of the heat rising upward is recovered. In the fifth step, the heat lost by the exhaust heat through the gap of the third condenser box 800 will be absorbed by the flat water tank 200. After passing through the above channels, the exhaust heat finally enters the second temperature return pipe 400 leading to the outside. At this time, the second temperature return pipe 400 recovers the remaining exhaust heat for the last time, so that the exhaust smoke reaches a low temperature state.

[0048] As a preferred embodiment, the bottom and top of the first condensation box 600 and the second condensation box 700 are both provided with smoke holes for smoke flow; the first condensation tube 610 and the second condensation tube 710 are both opposite to the smoke holes, and there is a gap between the horizontal sides of the first condensation tube 610 and the side walls of the first condensation box 600, and there is a gap between the horizontal sides of the second condensation tube 710 and the side walls of the second condensation box 700. The first condenser 610 is located in the first condenser box 600, and the second condenser 710 is located in the second condenser box 700. The first condenser box 600 and the second condenser box 700 are designed to form a cavity. During the rising process, the exhaust heat is first heated on the condenser tube. The fins on the condenser tube can efficiently absorb heat, and the gaps between the fins can filter carbon deposits. Similarly, the condenser tube has a blocking effect on the rapidly rising exhaust smoke. The blocked exhaust smoke will slow down the rapid rising process. In the process of slowing down the rising, more heat will be absorbed by the condenser tube. After being blocked, the remaining exhaust heat will bypass the side gap to the top and continue to rise to the next exhaust channel.

[0049] The two ends of the first condenser tube 610 are mounted on the opposite side walls of the first condenser box 600 through the mounting plate, and the two ends of the second condenser tube 710 are mounted on the opposite side walls of the second condenser box 700 through the mounting plate. The mounting plate can be mounted on the side wall of the condenser box by screws, etc. When the carbon deposits on the condenser tubes accumulate to a certain extent, the movable screws of the mounting plates on both sides can be loosened, and the condenser tubes can be directly removed from the side wall of the condenser box for cleaning. After cleaning, they can be installed and used again. The condenser tubes can efficiently and normally recover heat and filter carbon deposits again.

[0050] As a preferred embodiment, the third condensation box 800 is provided with a smoke inlet at the bottom, and a smoke outlet at one side of the third condensation box 800; the smoke outlet is connected to one end of the second temperature return pipe 400; three third condensation pipes 810 are provided, and the three third condensation pipes 810 are placed in an inverted U shape, and their U-shaped openings are opposite to the smoke inlet; the three third condensation pipes 810 are respectively installed in the third condensation box 800 through mounting plates. The third condensation box 800 is designed as a cavity. During the rising process of exhaust heat, it first heats the third condensation pipe 810. The fins on the condensation pipe can absorb heat efficiently, and the gaps between the fins can filter carbon deposits. Similarly, the condensation pipe has a blocking effect on the rapidly rising exhaust smoke. After being blocked, the exhaust heat will drift at the bottom of the third condensation pipe 810. During the drifting process, more heat will be absorbed by the condensation pipe, and finally discharged into the second temperature return pipe 400 from the side smoke outlet.

[0051] It should be noted that the third condensation box 800 is arranged above the first condensation box 600 and the second condensation box 700. The flue gas carbon deposit content it contacts is low, and the cleaning or replacement time is long, which can be cleaned and replaced once every five years, while the first condensation box 600 and the second condensation box 700 need to be cleaned and replaced once every 1-2 years. Therefore, multiple condensation tubes can be arranged in the third condensation box 800 to enhance the heat utilization effect. A replacement opening can be arranged on the side wall of the third condensation box 800, which is closed by a door panel to facilitate the disassembly and assembly of the three condensation tubes.

[0052] The flat water tank 200 is riveted and installed on the top of the third condensation tank 800. The third condensation tank 800 can be welded by a plurality of plates, and its top can be formed by connecting the top plate by bolts, and the flat water tank 200 can be integrally connected to the top plate, so that when the flue gas flows in the third condensation tank 800, its heat can be absorbed by the flat water tank 200. That is, when the exhaust heat flows in the third condensation tank 800, a part of the heat will escape upward through the gaps between the fins of the third condensation tube 810, and the flat water tank 200 is arranged above, and the water in the flat water tank 200 will take away the heat attached to the bottom of the flat water tank 200 during the flow process.

[0053] As a preferred embodiment, the first condensation box 600, the second condensation box 700 and the third condensation box 800 are all rectangular, and the size of the first condensation box 600 and the second condensation box 700 is smaller than that of the third condensation box 800, and the size of the first condensation box 600 is smaller than or equal to that of the second condensation box 700. The size of the third condensation box 800 is larger than that of the first condensation box 600 and the second condensation box 700, and it is located at the top, as the main condenser, after the exhaust heat passes through the first, second, third, fourth and fifth heat absorption devices, the remaining heat is recovered by the main condenser, and the water carrying five layers of heat flows in a serpentine shape in three sequentially connected condensation pipes in the main condenser, and the longer the serpentine flow distance, the more heat is recovered.

[0054] As a preferred embodiment, the first flue 310 is axially connected to the first temperature return pipe 300; the first water chamber 320 is arranged around the outside of the first flue 310, and the side walls of the first water chamber 320 are respectively provided with a first water inlet 321 and a first water outlet 322. Preferably, the first water inlet 321 is located below the side wall, and the first water outlet 322 is located above the side wall, and the two are staggered. Water circulates in the first water chamber 320 through the first water inlet 321 and the first water outlet 322, and the flow direction of the water flow is consistent with the rising direction of the smoke, effectively absorbing the heat of the smoke rising in the first flue 310.

[0055] The second flue is axially connected to the second temperature return pipe 400; the second water cavity is arranged around the outside of the second flue, and the second water cavity sidewalls are provided with a second water inlet and a second water outlet. Preferably, the second water inlet is located near the end of the third condensation tank 800, and the second water outlet is located at the end away from the third condensation tank 800 and is staggered. Water circulates in the second water cavity through the second water inlet and the second water outlet, and the flow direction of the water flow is consistent with the lateral flow direction of the flue gas, which can effectively absorb the heat of the flue gas flowing laterally in the second flue.

[0056] As a preferred implementation, a pressure gauge and a pressure relief valve are installed on the side wall of the first temperature return pipe 300, which can monitor the pressure in real time and release the pressure to maintain the safety of the equipment.

[0057] As a preferred implementation, a filter device is connected to one end of the smoke exhaust of the second temperature return pipe 400. When a smoke filter device is installed at the end of the smoke exhaust, the heat discharged into the atmosphere is already very low, close to or lower than normal temperature, and this heat will not cause temperature damage to any filter device, ensuring that the exhaust smoke meets environmental protection requirements, without visible combustion smoke, and achieving transparent and pollution-free emission.

[0058] As a preferred embodiment, the inner shell 110 and the side wall corresponding to the water tank are provided with a plurality of heat exchange holes 111, and the heat exchange holes 111 are respectively connected with the annular water cavity 130 and the water tank. By providing the heat exchange holes 111, the water in the annular water cavity 130 and the water in the water tank can be heat exchanged. Since the coil 500 will take away the heat of the water in the water tank during the heat recovery process, the heat can be heat exchanged, so that the heat in the furnace can be output evenly.

[0059] It should be noted that the above-mentioned cover plate 190, first condensation box 600, first temperature return pipe 300, second condensation box 700, third condensation box 800 and second temperature return pipe 400 and other structures are all connected by flanges, which are easy to disassemble and assemble, and the connection is firm.

[0060] As a preferred embodiment, the housing 120 is further provided with an overflow hole 122, a water replenishment hole and a sewage discharge hole 121. The overflow hole 122 and the water replenishment hole are close to the top of the housing 120, and the sewage discharge hole 121 is close to the bottom of the housing 120. By providing the overflow hole 122, when the water in the annular water cavity 130 and the water tank expands due to heat, it can be discharged through the overflow hole 122. By providing the water replenishment hole, it is convenient to replenish water into the furnace. By providing the sewage discharge hole 121, it is convenient to clean the water cavity in the furnace and discharge sewage, so as to keep the water cavity in the furnace clean.

[0061] As a preferred embodiment, a base 150 is provided at the bottom of the furnace body 100, a grille 151 is provided near the top of the base 150, and the furnace body 100 is installed on the grille 151; an ash box 152 is slidably provided on one side of the base 150, and the ash box 152 is directly opposite to the bottom of the grille 151. By providing the base 150 to support the furnace body 100, the fuel ash falls from the furnace bridge 160, passes through the grille 151 and enters the ash box 152, and the ash box 152 is a push-pull structure, which is convenient for collecting and processing ash.

[0062] As a preferred embodiment, a furnace door 180 is provided at the above-mentioned feed port, and one side of the furnace door 180 is hinged to the outer wall of the furnace body 100. The furnace door 180 can prevent heat from being lost to the outside when the fuel is burned. The furnace door 180 can be opened and closed to facilitate adding or reducing fuel.

[0063] Working principle of the embodiment of this application:

[0064] Heat recovery process: The fuel is burned and heated in the combustion chamber. The first pass is a 360° surrounding heating process, and the heat received by the furnace body 100 is absorbed by the medium water. Under the action of the circulating pump, the water has been flowing in a closed pipe or cavity. The second pass uses a 53-meter-long coil 500, which is coiled in a hot water mixing tank. The heat generated during the combustion of firewood or coal is first taken away from the furnace body 100 by the cooling water after the heat is dissipated through the coil 500, so that the wood charcoal condensing furnace does not boil. The second pass of heated water enters the first condenser tube 610, and takes away the heat in the exhaust process through a serpentine flow, achieving triple heating. The triple-heated water enters the vertical first temperature return tube 300, absorbs the horizontal radiation heat in the vertical exhaust process, and forms quadruple heating. The quadruple-heated water enters the second condenser tube 710, and takes away the exhaust heat absorbed by the second condenser tube 710 through a serpentine flow, forming quintuple heating. The water that has been heated five times enters the third condenser tube 810, and takes away the heat adsorbed by the third condenser tube 810 through serpentine flow, forming six-fold heating. The water that has been heated six times is transported to the flat water tank 200 at the top of the third condenser box 800. The bottom of the flat water tank 200 is riveted together with the third condenser box 800. During the rising process of heat, part of the heat will escape upward through the fin gap of the third condenser tube 810. At this time, the flat water tank 200 at the top just absorbs this part of the escaped heat, forming seven-fold heating. The water that has been heated seven times is transported to the horizontal second temperature return tube 400. After the water in the second temperature return tube 400 has undergone eight heating steps, it is finally transported to the heat dissipation device for heat dissipation. The water carrying a large amount of heat gradually increases in temperature during each flow process, and finally reaches the peak temperature and is transported to the radiator for heat dissipation, providing the required temperature value for the room. After the heat is dissipated, the cooling water is again transported by the circulation pump to the eight-fold temperature return device to flow, be heated, and be heated.

[0065] Exhaust flow direction: Exhaust heat loss accounts for about 60% of the heat of this charcoal condensing furnace. Only by recycling this 60% of heat can we avoid wasting heat, effectively reduce fuel use costs, and achieve low-carbon and environmentally friendly heating. In the first step of the rising process, the exhaust passes through the first condensation box 600 to recover the heat rising upward. In the second step, when the exhaust heat passes through the vertical first temperature return pipe 300, the horizontal radiation heat generated by the exhaust is recovered. In the third step, when the exhaust heat passes through the second condensation box 700, the upward heat is recovered again. In the fourth step, the exhaust heat enters the third condensation box 800. Since the third condensation box 800 is rectangular, the exhaust heat will move horizontally at the bottom of the rectangle, and the rectangular condensation box will recover more heat rising upward. In the fifth step, the heat lost by the exhaust heat through the gap between the fins of the rectangular condensation tube will be absorbed by the flat water tank 200. After passing through the above channels, the exhaust heat finally enters the second transverse temperature recovery pipe 400 leading to the outside. At this time, the second transverse temperature recovery pipe 400 recovers the remaining exhaust heat for the last time.

[0066] This application has eight stages of water heating, heat utilization, and heat recovery processes, which can improve the heat utilization rate compared to existing heating furnaces, truly achieve 90% heat utilization, and the exhaust flue gas reaches a low temperature state. The exhaust smoke can also be filtered and discharged, which can effectively reduce the impact of flue gas on the environment and achieve transparent and pollution-free emissions.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A charcoal condensing furnace, characterized in that: It comprises a furnace body and a first condensing tank, a first temperature return pipe, a second condensing tank, a third condensing tank and a flat water tank which are sequentially arranged above the furnace body, wherein one side of the flat water tank is connected to a second temperature return pipe; The first temperature return pipe is placed vertically and includes a first flue and a first water cavity; the second temperature return pipe is placed horizontally and includes a second flue and a second water cavity; The first condensation box, the second condensation box and the third condensation box can all be detachably connected with horizontally placed condensation tubes, and they correspond one to one to the first condensation tube, the second condensation tube and the third condensation tube respectively; The side wall of the furnace body is provided with a hollow annular water cavity, the interior of the furnace body is divided into a water tank and a combustion chamber by a water baffle plate, and a cover plate is provided on the top of the furnace body; the water baffle plate is provided with a smoke exhaust chimney connected to the combustion chamber, and the smoke exhaust chimney passes through the cover plate and is connected to the first condensation box, the first flue, the second condensation box, the third condensation box and the second flue in sequence; The water tank is connected to the annular water cavity, and a coil is arranged in the water tank. The water inlet of the coil passes through the cover plate and is connected to an external heat dissipation device. The water outlet of the coil passes through the cover plate and is sequentially connected to the first condenser, the first water cavity, the second condenser, the third condenser, the flat water tank, the second water cavity and the heat dissipation device.

2. The charcoal condensing furnace according to claim 1, characterized in that: The bottom and the top of the first condensation box and the second condensation box are both provided with smoke through holes for smoke to flow through; The first condensation tube and the second condensation tube are both opposite to the smoke through hole, and there is a gap between the horizontal sides of the first condensation tube and the side wall of the first condensation box, and there is a gap between the horizontal sides of the second condensation tube and the side wall of the second condensation box; Two ends of the first condenser tube are mounted on two opposite side walls of the first condenser box through mounting plates, and two ends of the second condenser tube are mounted on two opposite side walls of the second condenser box through mounting plates.

3. The charcoal condensing furnace according to claim 1, characterized in that: A smoke inlet is provided at the bottom of the third condenser, and a smoke outlet is provided at one side of the third condenser; the smoke outlet is connected to one end of the second temperature return pipe; The third condensation tubes are provided with three, and the three third condensation tubes are placed in an inverted U shape, and the U-shaped openings thereof are opposite to the flue gas inlet; the three third condensation tubes are respectively installed in the third condensation box through the installation plates; The flat water tank is riveted and installed on the top of the third condensation tank.

4. The charcoal condensing furnace according to any one of claims 1 to 3, characterized in that: The first condensation box, the second condensation box and the third condensation box are all rectangular, and the sizes of the first condensation box and the second condensation box are smaller than the size of the third condensation box, and the size of the first condensation box is smaller than or equal to the size of the second condensation box.

5. The charcoal condensing furnace according to claim 1, characterized in that: The first flue is axially arranged to penetrate the first temperature return pipe; the first water cavity is arranged around the outside of the first flue, and the side walls of the first water cavity are respectively provided with a first water inlet and a first water outlet; The second flue is axially penetrated along the second temperature return pipe; the second water cavity is arranged around the outside of the second flue, and the side walls of the second water cavity are respectively provided with a second water inlet and a second water outlet.

6. The charcoal condensing furnace according to claim 5, characterized in that: A pressure gauge and a pressure relief valve are installed on the side wall of the first temperature return pipe.

7. The charcoal condensing furnace according to claim 1, characterized in that: A filter device is connected to one end of the smoke exhaust pipe of the second temperature return pipe.

8. The charcoal condensing furnace according to claim 1, characterized in that: The inner wall of the annular water chamber is circumferentially provided with a plurality of heat exchange holes which are in communication with the water tank.

9. The charcoal condensing furnace according to claim 1, characterized in that: The outer wall of the annular water cavity is also provided with an overflow hole, a water replenishment hole and a sewage discharge hole, wherein the overflow hole and the water replenishment hole are close to the top of the outer wall, and the sewage discharge hole is close to the bottom of the outer wall.

10. The charcoal condensing furnace according to claim 1, characterized in that: A base is provided at the bottom of the furnace body, a grille is provided near the top of the base, and the furnace body is installed on the grille; an ash box is slidably provided on one side of the base, and the ash box is directly below the grille.

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