Multi-stage combustion heating and efficient heat exchange combined system

Abstract

The invention relates to the field of combustion heating and heat exchange, and discloses a multi-stage combustion heating and efficient heat exchange combined system which comprises an air bellow and an evaporation barrel, the interior of a lining barrel of the air bellow is connected with an air combing barrel through a sealing bottom plate, the top of the lining barrel is connected with a combustion barrel A in a sealed mode, and the combustion barrel A is sleeved with a combustion barrel B; the combustion cylinder B is sleeved with a combustion cylinder C, the combustion cylinder C is connected to the cylinder bottom plate in a sealed mode, and the combustion cylinder C is located in an evaporation cylinder cavity of the evaporation cylinder; the lining cylinder is provided with a fuel conveying pipe and an igniter; and the combustion cylinder C is connected with a flue gas heat exchange coil pipe. Internal air is combed and guided into required air flow to be fully mixed with fuel in the mixing chamber, the fuel is conveyed step by step in the mixing chamber, the combustion chamber A, the combustion chamber B and the combustion chamber C and is fully combusted, and combusted flames and high-temperature flue gas are collected into an inner chamber of the combustion chamber C to participate in heat exchange. And the fuel heat efficiency and heat exchange efficiency are improved.

Description

Technical Field

[0001] The invention relates to a combustion heating and heat exchange device, in particular to a multi-stage combustion heating and high-efficiency heat exchange combined system. Background Art

[0002] Fuel combustion is the process of converting chemical energy into thermal energy. Thermal energy is used to heat water to cook food or to turn water into high-temperature steam for steaming food or as a power source for mechanical transmission. Fuel generally contains gas (such as natural gas) or liquid (such as liquid fuel oil). Taking the heating of water in a pot or boiler as an example, the fuel generally burns at the bottom of the pot, and its heat loss is large, which affects the thermal utilization rate of fuel combustion. Improving thermal utilization rate is the current technical focus of research; and the fuel is generally burned directly at the bottom of the boiler, and the fuel and air are not fully mixed. Gas fuel is easier to mix, while the mixing efficiency of liquid fuel is often low, which leads to the inability of the fuel to be fully burned. In addition to the low fuel utilization rate, toxic gases such as carbon monoxide will be produced due to incomplete combustion; and the existing combustion devices are all directly burned at the bottom of the boiler (also known as primary combustion), which will inevitably cause incomplete combustion and the production of toxic gases such as carbon monoxide, which is a major technical problem currently faced by combustion devices. How to effectively utilize the heat energy from fuel combustion and make fuller use of the heat energy, such as allowing more heat energy to participate in heat exchange and turn water into water vapor. Therefore, heat exchange is also another major technical challenge of existing technologies. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems such as incomplete combustion and low heat exchange efficiency pointed out by the background technology, and to provide a multi-stage combustion heating and high-efficiency heat exchange combined system. The air is combed by a combing tube and enters a mixing chamber to promote the full mixing of fuel and air. The air is first ignited in the mixing chamber to form pre-combustion or primary combustion. The air-fuel mixture flows and is transmitted step by step with the wind flow. The secondary combustion is carried out in the combustion chamber A of the combustion tube A, the tertiary combustion is carried out in the combustion chamber B of the combustion tube B, and the quaternary combustion is carried out in the combustion chamber C of the combustion tube C, so that the air-fuel mixture is fully mixed and fully burned, thereby greatly reducing the emission of toxic gases such as carbon monoxide caused by incomplete combustion.

[0004] The purpose of the present invention is achieved through the following technical solutions: A multi-stage combustion heating and high-efficiency heat exchange combined system, including a bellows and an evaporating cylinder, the bellows having an inner liner, the inner liner being connected to a combing cylinder via a sealing bottom plate, the inner liner being sealed and connected to a combustion cylinder A at the top, a combustion cylinder B being installed on the outside of the combustion cylinder A; the bellows having an air inlet chamber, the bellows having an air inlet A connected to the air inlet chamber; the inner cavity of the combing cylinder being connected to the air inlet chamber of the bellows, the combing cylinder being provided with a plurality of wind grooves distributed in a circular pattern, a mixing chamber being formed between the inner wall of the inner liner and the outer wall of the combing cylinder, the combustion cylinder A having a combustion chamber A connected to the mixing chamber, The combustion tube B has a combustion chamber B inside, and the combustion tube A is evenly provided with a number of flame heat outlets A; the combustion tube B is externally mounted with a combustion tube C, and the combustion tube C has a combustion chamber C inside, and the combustion tube B is provided with a number of flame heat outlets B; the top of the bellows is sealedly connected to the bottom plate of the evaporator, and the combustion tube C is sealedly connected to the bottom plate, and the combustion tube C is located in the evaporator cavity of the evaporator; the inner liner of the bellows is installed with a fuel delivery pipe, and the inner liner is installed with an igniter corresponding to the pipe mouth of the fuel delivery pipe; the combustion tube C is connected to a flue gas heat exchange coil with a smoke exhaust pipe mouth placed outside the evaporator.

[0005] In order to better implement the present invention, a fan box is connected to the bottom of the wind box, the bottom of the fan box is an air inlet filter plate, and a pulse pump corresponding to the fuel tank is installed inside the fan box, and the pulse pump is connected to the fuel delivery pipe.

[0006] Preferably, the combustion tube C is provided with a smoke exhaust port; and a fan corresponding to the air inlet A is also installed inside the fan box.

[0007] Preferably, a pipe joint A is sealed and installed on the smoke exhaust port, a pipe joint B is sealed and installed through the bottom plate of the cylinder, and the flue gas heat exchange coil located in the evaporator cylinder cavity is sealed and connected between the pipe joints A and B.

[0008] Preferably, the combing cylinder consists of a cylinder body A and a cylinder top plate A located at the top of the cylinder body A and sealed with the top of the cylinder body A, the bottom of the cylinder body A has an air inlet opening connected to the air inlet chamber, the inner cavity of the cylinder body A is an air collecting chamber; all the wind grooves are distributed in a circular shape along the cylinder wall surface of the cylinder body A.

[0009] Preferably, among all the wind slots, all the wind slots are downwind slots, or all the wind slots are upwind slots, or some of the wind slots are downwind slots and the remaining wind slots are upwind slots; the downwind slots are arranged to be inclined clockwise from the inner wall to the outer wall of the cylinder A for air outlet, and the upwind slots are arranged to be inclined counterclockwise from the inner wall to the outer wall of the cylinder A for air outlet.

[0010] Preferably, half of the wall of the cylinder A is provided with upwind grooves, and half of the wall of the cylinder A is provided with downwind grooves.

[0011] Preferably, the combustion tube A consists of a tube body B and an annular bottom plate A arranged on the outer side of the bottom of the tube body B. The annular bottom plate A is sealed and connected to the top bolts of the inner liner tube, and all flame heat outlets A are evenly arranged on the tube wall of the tube body B; the top height of the inner liner tube is higher than the top height of the combing tube.

[0012] Preferably, a flameout protection detection needle is installed in the inner cavity of the comb cylinder, a needle penetration hole is opened in the center of the cylinder A, and the detection needle end of the flameout protection detection needle corresponds to the needle penetration hole passing through the cylinder A; the inner wall of the lining cylinder is also covered with a wire mesh.

[0013] Preferably, the inner liner is provided with a fuel inlet, the fuel inlet is connected to a fuel inlet pipe, and the fuel inlet pipe is sealed and connected to the fuel delivery pipe; the inner liner is also provided with an igniter mounting hole corresponding to the fuel inlet position, and the igniter is installed in the igniter mounting hole.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: (1) In the present invention, the air is combed by the combing tube and enters the mixing chamber to promote the full mixing of gas fuel or atomized liquid fuel and air. The air is ignited for the first time in the mixing chamber to form pre-combustion or primary combustion. The air-fuel mixture is transmitted step by step with the wind flow. The secondary combustion is carried out in the combustion chamber A of the combustion tube A, the tertiary combustion is carried out in the combustion chamber B of the combustion tube B, and the quaternary combustion is carried out in the combustion chamber C of the combustion tube C. The air-fuel mixture is fully mixed and fully burned, which greatly reduces the emission of toxic gases such as carbon monoxide caused by incomplete combustion. At the same time, the sufficient combustion makes the fuel thermal efficiency higher.

[0015] (2) In the step-by-step combustion process of the present invention, the high-temperature flame and flue gas follow the wind flow through the flame heat outlet A in turn into the combustion chamber B of the combustion tube B, and then after mixing, pass through the flame heat outlet B into the combustion chamber C of the combustion tube C. All air-fuel mixtures will be fully burned. At the same time, the burning flame and high-temperature flue gas will be transmitted step by step and collected in the inner cavity of the combustion tube C. The combustion tube C is placed inside the evaporator tube and realizes efficient heat exchange. The combustion tube C increases the heat exchange area through heat exchange over a larger area, thereby promoting heat exchange efficiency.

[0016] (3) The wall of the combing tube of the present invention is provided with a plurality of wind grooves connected to the mixing chamber in a circumferentially distributed manner, and three wind groove layout schemes are provided, which can comb the wind inside the combing tube and guide it into the required wind flow and fully mix it with the fuel to facilitate full combustion, thereby improving the combustion efficiency. The present invention can be used as a core component of a high-fire stove.

[0017] (4) If the fuel entering the mixing chamber is liquid fuel oil, during the continuous combustion process, the combing tube, the inner liner and the mixing chamber are all in a high-temperature environment, and the liquid fuel oil is vaporized immediately upon entering the mixing chamber and is transmitted step by step; combined with the wind flow guide of the fan of the present invention, all the wind slot guides of the combing tube, the step-by-step combustion drainage function and the exhaust operation of the flue gas heat exchange coil, orderly fuel mixing, step-by-step combustion, flue gas heat exchange, smoke exhaust and other processes are realized, thereby improving the fuel thermal utilization rate and heat exchange efficiency; the present invention can be applied to both gas fuels and liquid fuels, and can be applied to various combustion heat exchange, heating, and various application scenarios using water vapor as power. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external structure of the multi-stage combustion heating and high-efficiency heat exchange combined system of the present invention; Figure 2 for Figure 1 Schematic diagram of the structure from a top-down perspective; Figure 3 for Figure 1 Schematic diagram of the structure after removing the side shell of the fan box, the side shell of the evaporator tube, and the flue gas heat exchange coil; Figure 4 for Figure 3 Cross-sectional view after removing the fan box; Figure 5 for Figure 3 A schematic diagram of the three-dimensional structure of the flue gas heat exchange coil arranged in the middle; Figure 6 for Figure 3 Cross-sectional view after removing the bottom plate of the cylinder; Figure 7 for Figure 6 Schematic diagram of the structure of the stroke box; Figure 8 for Figure 6 Schematic diagram of the three-dimensional structure of the middle comb hair dryer; Fig. 9 It is a schematic diagram of the combing tube in the embodiment in which the upwind slots and the downwind slots are symmetrically arranged in the fuel inlet direction; Fig.10 for Figure 6 Schematic diagram of the three-dimensional structure of the middle combustion tube A; Fig.11 for Figure 6 Schematic diagram of the three-dimensional structure of the middle combustion tube B.

[0019] The names corresponding to the reference numerals in the accompanying drawings are: 1-wind box, 11-liner, 12-sealed bottom plate, 2-fan box, 21-air inlet filter plate, 3-pulse pump, 31-fuel delivery pipe, 311-fuel inlet, 3111-fuel inlet direction, 312-fuel inlet pipe, 4-fan, 5-igniter installation hole, 6-comb wind tube, 61-tube body A, 611-upwind slot, 612-downwind slot, 62-tube top plate A, 63-needle passage hole, 7-flameout protection detection needle, 8-wire screen, 9-combustion tube A, 91-tube body B, 911-flame heat outlet A, 92-ring bottom plate A, 10-combustion tube B, 101-flame heat outlet B, 13-combustion tube C, 131-pipe joint A, 14-flue gas heat exchange coil, 15-evaporation tube, 151-tube bottom plate, 1511-pipe joint B, 16-air inlet A, 17-annular step. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below in conjunction with embodiments: Example

[0021] like Figure 1 , Figure 2 and Figure 6 As shown, a multi-stage combustion heating and high-efficiency heat exchange combined system includes a wind box 1 and an evaporation tube 15, as shown in FIG. Figure 7 As shown, the bellows 1 of this embodiment has an air inlet chamber inside, and the bellows 1 has an inner liner 11 inside (the middle of the bellows 1 is recessed and has the inner liner 11, and the air inlet chamber of the bellows 1 of this embodiment enters the bottom), the inner liner 11 is connected to the combing tube 6 through a sealing bottom plate 12, the combing tube 6 is located inside the inner liner 11, a mixing chamber is formed between the inner liner 11 and the combing tube 6, and an annular sealing bottom plate 12 is sealed between the bottom end of the inner liner 11 and the bottom end of the combing tube 6. The top of the inner liner 11 is sealedly connected to the combustion tube A9, and the outer side of the bottom end of the combustion tube A9 has an annular bottom plate A92, and the annular bottom plate A92 is sealedly connected to the top of the inner liner 11 (for example, the annular bottom plate A92 is directly covered on the top of the inner liner 11), as shown Figure 6 As shown, the top height of the inner liner 11 is higher than the top height of the combing tube 6, so that a fuel mixed channel is formed between the top of the combing tube 6 and the annular bottom plate A92, and a combustion tube B10 is installed on the outside of the combustion tube A9, and the combustion tube A9 is located in the inner cavity of the combustion tube B10 as a whole, and the bottom of the combustion tube B10 is connected to the annular bottom plate A92 or the top of the inner liner 11. The wind box 1 has an air inlet chamber, and the wind box 1 has an air inlet A16 connected to the air inlet chamber, and the air inlet A16 continuously supplies combustion-supporting air to the wind box 1.

[0022] The inner cavity of the combing cylinder 6 is connected to the air inlet chamber of the bellows 1. The bottom of the combing cylinder 6 of the present invention is fully or partially opened. Figure 6As shown, the inner cavity of the combing cylinder 6 is connected to the air inlet chamber of the bellows 1; the combing cylinder 6 is provided with a plurality of air slots distributed in a circumferential manner, and a mixing chamber is formed between the inner wall of the lining cylinder 11 and the outer wall of the combing cylinder 6 (the bottom of the mixing chamber is a sealing bottom plate 12, which is not directly connected to the air inlet chamber of the bellows 1, and the mixing chamber is connected to the inner cavity of the combing cylinder 6 through various air slots). External wind enters the air inlet chamber of the bellows 1 through the air inlet A16, and then gathers in the inner cavity of the combing cylinder 6, as shown in FIG. Figure 8 As shown, the wall of the combing tube 6 is formed with wind grooves distributed around a circle (the wind grooves play the role of combing the wind, and the wind flow entering the mixing chamber after being combed by the wind grooves presents a certain regularity, thereby enhancing the mixing efficiency of the gas fuel or atomized fuel and the air and achieving more complete mixing). The wind combed by the combing tube 6 enters the mixing chamber to promote the mixing of the gas fuel or atomized fuel and the air. The mixture of fuel and air is called an air-fuel mixture, which is ignited for the first time in the mixing chamber (here it can be called pre-combustion or primary combustion. During the continuous combustion process, the combing tube 6, the inner liner 11 and the mixing chamber are all in a high-temperature environment. If the fuel entering the mixing chamber is liquid fuel, it will be vaporized immediately at the moment of entry and transmitted step by step).

[0023] The air-fuel mixture enters the combustion chamber A of combustion tube A9 (which can be called secondary combustion), the combustion chamber B of combustion tube B10 (which can be called tertiary combustion), and the combustion chamber C of combustion tube C13 (which can be called quaternary combustion) in turn, and burns step by step, so that the air-fuel mixture is fully mixed and fully burned (greatly reducing the emission of toxic gases such as carbon monoxide caused by incomplete combustion, and at the same time, full combustion makes the fuel thermal efficiency higher). During the continuous combustion process, the comb tube 6, the inner liner tube 11 and the mixing chamber are all in a high-temperature environment. If the fuel entering the mixing chamber is liquid fuel, it will be vaporized immediately at the moment of entry and flowed and transmitted step by step. The high-temperature flame and flue gas of the combustion tube A9 enter the combustion chamber B of the combustion tube B10 through the flame heat outlet A911, and then enter the combustion chamber C of the combustion tube C13 through the flame heat outlet B101 after mixing. All air-fuel mixtures will be fully burned. At the same time, the burning flame and high-temperature flue gas will be transmitted step by step and gathered in the inner cavity of the combustion tube C13. Since the combustion tube C13 is located inside the evaporator tube 15, efficient heat exchange of the water inside the evaporator tube 15 (the water surrounding the combustion tube C13) is achieved. The combustion tube C13 increases the heat exchange area and promotes the heat exchange efficiency.

[0024] The combustion tube A9 has a combustion chamber A connected to the mixing chamber (i.e., the inner cavity of the combustion tube A9, the bottom of the combustion tube A9 is the chamber inlet A), and the combustion tube B10 has a combustion chamber B (i.e., the inner cavity of the combustion tube B10, the bottom of the combustion tube B10 is covered by the annular bottom plate A92). Fig.10As shown, the combustion cylinder A9 is evenly provided with a plurality of flame heat outlets A911 (the flame heat outlets A911 connect the combustion chamber A and the combustion chamber B). The combustion cylinder B10 is externally provided with a combustion cylinder C13, and the combustion cylinder C13 has a combustion chamber C inside (i.e., the cylinder inner cavity of the combustion cylinder C13, and the combustion chamber C is a closed chamber); see Fig.11 , the combustion tube B10 is provided with a plurality of flame heat outlets B101 (the flame heat outlets B101 connect the combustion chamber B and the combustion chamber C). The bottom of the evaporation tube 15 is closed with a tube bottom plate 151, and the top of the wind box 1 is connected and fixed to the tube bottom plate 151 of the evaporation tube 15 (in this embodiment, a mounting plate is fixedly installed on the tube bottom plate 151 of the evaporation tube 15, and the top of the wind box 1 is detachably fixedly connected to the mounting plate at the bottom of the evaporation tube 15 by bolts). The combustion tube C13 is sealedly connected to the tube bottom plate 151 (the top of the combustion tube C13 is sealed by the tube top plate, and the bottom of the combustion tube C13 can be sealed by the tube bottom plate, or the bottom of the combustion tube C13 is open and sealedly connected to the tube bottom plate 151, and the tube cavity of the combustion tube C13 forms a closed combustion chamber C; similarly, a mounting plate can also be fixedly installed on the top surface of the tube bottom plate 151, and the bottom of the combustion tube C13 is detachably fixedly connected to the mounting plate by bolts), and the combustion tube C13 is located in the evaporation tube cavity of the evaporation tube 15.

[0025] The inner liner 11 of the bellows 1 is installed with a fuel delivery pipe 31 (the present invention is mainly used for gas fuel or liquid fuel, and the fuel delivery pipe 31 is used to deliver fuel. If the fuel is gas fuel, the fuel delivery pipe 31 is connected to an air pump; if the fuel is liquid fuel, the fuel delivery pipe 31 is connected to a pulse pump or a liquid fuel vaporization system that sprays water mist. The liquid fuel vaporization system includes an oil pump and a vaporizer). The inner liner 11 is installed with an igniter corresponding to the pipe mouth of the fuel delivery pipe 31. After the fuel is output through the pipe mouth of the fuel delivery pipe 31, the igniter performs an ignition operation accordingly. The combustion cylinder C13 is connected to a flue gas heat exchange coil 14 whose exhaust pipe outlet is placed outside the evaporation cylinder 15. The flue gas heat exchange coil 14 is connected and communicated with the combustion cylinder C13. The high-temperature flue gas of the combustion cylinder C13 enters the flue gas heat exchange coil 14. The flue gas heat exchange coil 14 is placed as a whole inside the evaporation cylinder 15 to perform heat exchange operations between the high-temperature flue gas and water. The exhaust pipe outlet at the tail end of the flue gas heat exchange coil 14 is placed outside the evaporation cylinder 15.

[0026] In some embodiments, Figure 1 , Figure 3As shown, the bottom of the wind box 1 is connected to a fan box 2, the bottom of the fan box 2 is an air inlet filter plate 21 (the air inlet filter plate 21 is provided with a plurality of filter holes, which serves as the air inlet area of ​​the fan box 2), and a pulse pump 3 (the pulse pump 3 can be used for liquid fuel and gas fuel) correspondingly connected to the fuel tank is installed inside the fan box 2, and the pulse pump 3 is connected to the fuel delivery pipe 31, and the pulse pump 3 is used to deliver the gas fuel of the gas source or the liquid fuel in the oil tank. Figure 4 As shown, a fan 4 corresponding to the air inlet A16 is also installed inside the fan box 2.

[0027] The combustion tube C13 of the present invention is provided with a smoke exhaust port; Figure 5 As shown, a pipe joint A131 is sealed and installed on the smoke outlet, a pipe joint B1511 is sealed and installed through the bottom plate 151, and a smoke heat exchange coil 14 located in the evaporator cylinder cavity is sealed and connected between the pipe joint A131 and the pipe joint B1511, and the smoke heat exchange coil 14 is evenly spirally arranged inside the evaporator cylinder 15. The pipe joint B1511 can be connected to a discharge pipe, and the discharge pipe is used to discharge the smoke after heat exchange. Preferably, the smoke in the discharge pipe can be further heat exchanged to further effectively utilize the heat in the smoke.

[0028] like Figure 8 As shown, the combing cylinder 6 consists of a cylinder body A61 and a cylinder top plate A62 located at the top of the cylinder body A61 and sealed with the top of the cylinder body A61. The bottom of the cylinder body A61 has an air inlet opening connected to the air inlet chamber, and the inner cavity of the cylinder body A61 is an air collecting chamber; all wind grooves are distributed in a circular pattern along the cylinder wall surface of the cylinder body A61.

[0029] In some embodiments, among all the air ducts, there are three layout schemes as follows: The first solution: All the wind slots are downwind slots. Since all the wind slots of the barrel A61 of the combing barrel 6 are downwind slots, the fan blows air into the inner cavity of the barrel A61. After passing through all the wind slots (the wind slots play a role in combing and guiding the wind flow, and the wind flow after combing and guiding enters the mixing chamber), a clockwise wind flow is formed. The clockwise wind flow in the mixing chamber is fully mixed with the fuel that enters the fuel inlet 311, and then evenly distributed throughout the mixing chamber. During the combustion process, the combing barrel 6 and the inner liner 11 are both at high temperature, and the mixing chamber is also in a high temperature environment. If liquid fuel is used, the liquid fuel is sprayed into the mixing chamber through a pulse oil pump (sprayed in the form of water mist), and then the liquid fuel is vaporized into gas fuel in the mixing chamber in a high temperature environment.

[0030] The second solution: all the wind slots are counterwind slots. Since all the wind slots of the cylinder A61 of the combing cylinder 6 are counterwind slots, the fan blows air into the inner cavity of the cylinder A61. After passing through all the wind slots (the wind slots serve as windflow combing guides, and the windflow after combing and guiding enters the mixing chamber), a counterclockwise windflow is formed. The counterclockwise windflow in the mixing chamber is fully mixed with the fuel entering from the fuel inlet 311, and then evenly distributed in the entire mixing chamber.

[0031] The third option: some of the wind ducts are downwind ducts, and the remaining wind ducts are upwind ducts.

[0032] In the above three schemes, the downwind groove is arranged to be inclined clockwise from the inner wall to the outer wall of the cylinder A61 (so that the air discharged from the downwind groove of the cylinder A61 will form a clockwise wind, and then form a clockwise wind flow guidance when entering the mixing chamber), and the upwind groove is arranged to be inclined counterclockwise from the inner wall to the outer wall of the cylinder A61 (so that the air discharged from the upwind groove of the cylinder A61 will form a counterclockwise wind, and then form a counterclockwise wind flow guidance when entering the mixing chamber).

[0033] The third embodiment of the present invention further preferred technical solution is as follows: Figure 8 Among all the wind slots, half of them are downwind slots 612, and the other half are upwind slots 611. Upwind slots 611 are arranged on half of the cylinder wall of the cylinder A61 (that is, all upwind slots 611 constitute downwind slot units and are arranged on half of the cylinder wall of the cylinder A61). Downwind slots 612 are arranged on half of the cylinder wall of the cylinder A61 (that is, all downwind slots 612 constitute downwind slot units and are arranged on half of the cylinder wall of the cylinder A61). In the actual setting of this embodiment, the direction in which the fuel enters the fuel inlet 311 is the fuel entry direction 3111 ( Fig. 9 As shown by the arrow, the fuel entering from the fuel entry direction 3111 is vaporized into vapor fuel in a high temperature environment (if it is a gas fuel itself, vaporization is not required), and the fuel inlet 311 is arranged at the junction of the downwind slot unit and the upwind slot unit. A part of the fuel entering from the fuel entry direction 3111 moves clockwise under the guidance of the downwind flow of the downwind slot unit and is fully mixed at the same time, and the other part moves counterclockwise under the guidance of the upwind flow of the upwind slot unit and is fully mixed at the same time.

[0034] like Fig.10 As shown, the combustion tube A9 consists of a tube body B91 and an annular bottom plate A92 arranged on the outside of the bottom of the tube body B91. The annular bottom plate A92 is sealed and connected to the top bolt of the inner liner tube 11, and all flame heat outlets A911 are evenly arranged on the tube wall of the tube body B91.

[0035] like Figure 6 , Figure 8As shown, a flameout protection detection needle 7 is installed in the inner cavity of the combing tube 6, and a needle penetration hole 63 is opened in the center of the cylinder A61. The detection needle end of the flameout protection detection needle 7 corresponds to the needle penetration hole 63 passing through the cylinder A61. The detection needle end of the flameout protection detection needle 7 is placed in the space between the top of the combing tube 6 and the combustion tube A9 to perform flameout temperature detection and flameout emergency protection. When the flameout protection detection needle 7 detects flameout, it immediately shuts down the pulse pump 3 and the fan 4 and other components or re-ignites the operation through the igniter. The inner wall of the liner tube 11 is also covered with a wire mesh 8 (a part of the fuel burns on the wire mesh 8, and the fuel combustion on the wire mesh 8 is conducive to the stable and continuous combustion in the mixing chamber).

[0036] In some embodiments, the inner liner 11 is provided with a fuel inlet 311, the fuel inlet 311 is connected with a fuel inlet pipe 312, and the fuel inlet pipe 312 is sealed and connected with the fuel delivery pipe 31. The inner liner 11 is also provided with an igniter mounting hole 5 corresponding to the position of the fuel inlet 311, and the igniter is installed in the igniter mounting hole 5.

[0037] When in use, taking liquid fuel as an example, the fuel delivery pipe 31 (under the power output of the pulse pump 3) sprays the liquid fuel into a mist form from the fuel inlet 311 into the mixing chamber, and the igniter is used to ignite the liquid fuel in a mist form. The fan 4 blows air into the bellows 1 through the air inlet A16. The air is collected in the inner cavity of the combing tube 6 and then combed through various wind grooves to guide it into the required wind flow. The wind grooves play the role of combing the wind. The wind flow that enters the mixing chamber after being combed by the wind grooves presents a certain regularity (the wind flow in any of the three modes, and the wind flow designed by the wind grooves in the third mode is preferred in this embodiment), which enhances the mixing efficiency of the fuel and the air and achieves a more complete mixing. The wind combed by the combing tube 6 enters the mixing chamber to promote the mixing of the fuel and the air. The mixed fuel and air are called an air-fuel mixture, which is ignited for the first time in the mixing chamber (the first ignition can be called a pre-combustion or a first combustion). Stage combustion, during the continuous combustion process, the combing tube 6 and the inner liner tube 11 and the mixing chamber are all high-temperature environments. If the fuel entering the mixing chamber is liquid fuel, it will be vaporized and transmitted step by step at the moment of entry). The air-fuel mixture enters the combustion chamber A of the combustion tube A9 (called the second stage combustion), the combustion chamber B of the combustion tube B10 (called the third stage combustion), and the combustion chamber C of the combustion tube C13 (called the fourth stage combustion) in turn, and burns step by step, so that the air-fuel mixture is fully mixed and fully burned (greatly reducing the emission of toxic gases such as carbon monoxide caused by incomplete combustion, and at the same time, full combustion makes the fuel thermal efficiency higher). During the continuous combustion process, the high-temperature flame and smoke of the combustion tube A9 enter the combustion chamber B of the combustion tube B10 through the flame heat outlet A911, and then enter the combustion chamber C of the combustion tube C13 through the flame heat outlet B101 after mixing. All air-fuel mixtures will be fully burned, and at the same time, the burning flame and high-temperature smoke will be transmitted step by step and gathered to the inner cavity of the combustion tube C13, and fully participate in heat exchange. The combustion cylinder C13 is located inside the evaporation cylinder 15, and realizes efficient heat exchange of the water inside the evaporation cylinder 15 (the water around the combustion cylinder C13). The combustion cylinder C13 increases the heat exchange area and promotes the heat exchange efficiency. The water in the evaporation cylinder 15 evaporates into high-temperature steam, which can be used as a high-pressure gas power source, and can also be used to steam food (a circular step 17 for placing objects is provided in the form of a circular protrusion inside the evaporation cylinder 15, and a steaming grid with mesh is placed on the circular step 17, such as a steamer is placed on the steaming grid, and high-temperature steam can be used to steam food), and can also be used as a heat source to be transported to other places that need heating or heat exchange.

[0038] The high-temperature flue gas after fuel combustion in the present invention is input into the flue gas heat exchange coil 14, and the flue gas heat exchange coil 14 is evenly spirally arranged inside the evaporator tube 15, so that the high-temperature flue gas of the flue gas heat exchange coil 14 exchanges heat with the water in the evaporator tube 15, effectively utilizing the heat energy of the flue gas and improving the heat exchange efficiency.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage combustion heating and high-efficiency heat exchange combined system, characterized in that: It includes a bellows and an evaporating cylinder, wherein the bellows has an inner liner inside, the inner liner is connected to a combing cylinder via a sealing bottom plate, the top of the inner liner is sealed and connected to a combustion cylinder A, and a combustion cylinder B is installed on the outside of the combustion cylinder A; the bellows has an air inlet chamber, and the bellows has an air inlet A connected to the air inlet chamber; the inner cavity of the combing cylinder is connected to the air inlet chamber of the bellows, the combing cylinder has a plurality of wind grooves distributed in a circular pattern, a mixing chamber is formed between the inner wall of the inner liner and the outer wall of the combing cylinder, the combustion cylinder A has a combustion chamber A connected to the mixing chamber, and the combustion cylinder B has a Combustion chamber B, a plurality of flame heat outlets A are evenly opened on the combustion tube A; a combustion tube C is mounted on the outside of the combustion tube B, and a combustion chamber C is arranged inside the combustion tube C, and a plurality of flame heat outlets B are opened on the combustion tube B; the top of the bellows is sealedly connected to the bottom plate of the evaporator tube, and the combustion tube C is sealedly connected to the bottom plate, and the combustion tube C is located in the evaporator tube cavity of the evaporator tube; the inner liner of the bellows is installed with a fuel delivery pipe, and the inner liner is installed with an igniter corresponding to the pipe mouth of the fuel delivery pipe; the combustion tube C is connected to a flue gas heat exchange coil with a smoke exhaust pipe mouth placed outside the evaporator tube.

2. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 1, characterized in that: The bottom of the wind box is connected with a fan box, the bottom of the fan box is an air inlet filter plate, and a pulse pump corresponding to the fuel tank is installed inside the fan box, and the pulse pump is connected to the fuel delivery pipe.

3. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 2, characterized in that: The combustion tube C is provided with a smoke exhaust port; a fan corresponding to the air inlet A is also installed inside the fan box.

4. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 3, characterized in that: A pipe joint A is sealed and installed on the smoke exhaust port, a pipe joint B is sealed and installed through the bottom plate of the cylinder, and the smoke heat exchange coil located in the evaporator cylinder cavity is sealed and connected between the pipe joint A and the pipe joint B.

5. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 1, characterized in that: The combing cylinder consists of a cylinder body A and a cylinder top plate A located at the top of the cylinder body A and sealed with the top of the cylinder body A. The bottom of the cylinder body A has an air inlet opening connected to the air inlet chamber. The inner cavity of the cylinder body A is an air collecting chamber. All the wind grooves are distributed in a circular shape along the cylinder wall surface of the cylinder body A.

6. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 5, characterized in that: Among all the wind slots, all the wind slots are downwind slots, or all the wind slots are upwind slots, or some of the wind slots are downwind slots and the remaining wind slots are upwind slots; the downwind slots are arranged to be inclined clockwise from the inner wall to the outer wall of the cylinder A for air outlet, and the upwind slots are arranged to be inclined counterclockwise from the inner wall to the outer wall of the cylinder A for air outlet.

7. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 6, characterized in that: Half of the cylinder wall of the cylinder A is provided with upwind grooves, and half of the cylinder wall of the cylinder A is provided with downwind grooves.

8. The multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 1, characterized in that: The combustion tube A consists of a tube body B and an annular bottom plate A arranged on the outside of the bottom of the tube body B. The annular bottom plate A is bolted and sealed to the top of the inner liner tube. All flame heat outlets A are evenly arranged on the tube wall of the tube body B. The top height of the inner liner tube is higher than the top height of the combing tube.

9. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 5, characterized in that: A flameout protection detection needle is installed in the inner cavity of the comb cylinder, a needle penetration hole is opened in the center of the cylinder A, and the detection needle end of the flameout protection detection needle corresponds to the needle penetration hole passing through the cylinder A; the inner wall of the lining cylinder is also covered with a wire mesh.

10. A multi-stage combustion heating and high-efficiency heat exchange combined system according to claim 1, characterized in that: The inner liner is provided with a fuel inlet, the fuel inlet is connected to a fuel inlet pipe, and the fuel inlet pipe is sealed and connected to the fuel delivery pipe; the inner liner is also provided with an igniter mounting hole corresponding to the fuel inlet position, and the igniter is installed in the igniter mounting hole.

Images