Heat exchange biomass fuel stove

Abstract

The present invention provides a heat exchange biomass fuel stove, which relates to the technical field of heating equipment, including a stove body, a feed barrel, a second water exchange water jacket and a flue, wherein a first water exchange water jacket is provided on the periphery of the stove body; a heat exchange cavity is provided inside the second water exchange water jacket; the feed barrel is arranged through the side wall of the stove body; a part of the tube wall of the feed barrel is located in the heat exchange cavity, and a water jacket sleeve connected to the second water exchange water jacket is provided on the periphery of the feed barrel. The heat exchange biomass fuel stove provided by the present invention can effectively reduce the floor space of the stove body by arranging the second water exchange water jacket and the feed barrel on the same side of the stove body, and is convenient for the arrangement and installation of the stove body. The water jacket sleeve arranged on the periphery of the feed barrel can effectively protect the feed barrel and the fuel inside, and avoid excessive heat of the flue gas in the flue from being transferred to the fuel, causing the fuel to burn in the feed barrel, thereby achieving the effect of the fuel smoothly entering the furnace for full combustion, and avoiding the loss of fuel.

Description

Technical Field

[0001] The invention belongs to the technical field of heating equipment, and more specifically, relates to a heat exchange biomass fuel stove. Background Art

[0002] Biomass combustion furnaces are widely used in various heat energy industries such as heating equipment, boilers, industrial furnaces, incinerators, etc. Existing biomass combustion furnaces use the combustion of material fuels to generate combustible gas, and use burners to guide the combustible gas to the furnace mouth for combustion to generate heat energy, thereby realizing the subsequent utilization of heat energy.

[0003] The existing biomass combustion furnace needs to be provided with both a feed tube and a flue, so the entire device occupies a large area, and is prone to positional interference with other components during installation, making the layout difficult and inconvenient to install. Summary of the invention

[0004] The purpose of the present invention is to provide a heat exchange biomass fuel furnace to solve the technical problems of the biomass combustion furnace in the prior art, such as large occupation of area, difficult layout and inconvenient installation.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a heat exchange biomass fuel stove, including a stove body, a second water exchange water jacket, a feed barrel and a flue, a furnace for accommodating biomass fuel is provided inside the stove body, a burner extending downward is suspended at the stove mouth of the stove body, a first water exchange water jacket is provided on the outer periphery of the stove body, and a smoke hood is provided above the stove mouth; the second water exchange water jacket is arranged on the side of the stove body and a heat exchange cavity is provided inside, and a heat exchange tube is provided in the heat exchange cavity; the second water exchange water jacket is communicated with the first water exchange water jacket, and the second water exchange water jacket is also provided with a smoke exhaust pipe for connecting the heat exchange cavity with the outside; the feed barrel is arranged through the side wall of the stove body and the lower end is communicated with the furnace; a part of the tube wall of the feed barrel is located in the heat exchange cavity, and the outer periphery of the tube wall of the feed barrel located in the heat exchange cavity is provided with a water jacket sleeve connected with the second water exchange water jacket; the flue is arranged on the second water exchange water jacket and is used to connect the smoke hood and the heat exchange cavity.

[0006] As a further optimization, a grate is provided at the bottom of the furnace, and the furnace body is located below the grate as an ash storage chamber. The furnace body is provided with an ash outlet, and the furnace body is detachably connected to a ash outlet door, which is sealed to the furnace body.

[0007] As a further optimization, a material storage box is provided at the upper end of the feed barrel, and a material box cover is hinged on the top of the material storage box.

[0008] As a further optimization, a baffle is provided in the smoke hood, the plate surface of which is arranged in the up-down direction and is located between the flue and the furnace opening.

[0009] As a further optimization, the baffle is arranged away from the inlet end of the smoke hood.

[0010] As a further optimization, the smoke exhaust pipe is located on the side of the heat exchange chamber away from the furnace body and passes through the second water exchange water jacket, and the main axis of the smoke exhaust pipe is lower than the main axis of the flue.

[0011] As a further optimization, the burner includes an air collecting portion extending into the interior of the furnace and a combustion portion connected to the upper end of the air collecting portion, and the combustion portion is mounted on the furnace mouth of the furnace.

[0012] As a further optimization, the diameter of the air collecting portion gradually increases from bottom to top, and a plurality of air collecting holes arranged along the circumferential direction are provided on the outer wall of the air collecting portion.

[0013] As a further optimization, a plurality of air inlet holes arranged circumferentially are provided on the upper periphery of the combustion part, and an air supply cavity connected to the air inlet holes is provided on the periphery of the furnace mouth, and the air supply cavity is connected to the outside through an air supply pipe.

[0014] As a further optimization, the air supply pipe is located on the side of the furnace mouth away from the flue.

[0015] The beneficial effect of the heat exchange biomass fuel stove provided by the present invention is that the heat exchange biomass fuel stove provided by the present invention can effectively reduce the footprint of the stove body by arranging the second water exchange water jacket and the feed barrel on the same side of the stove body, and is convenient for the arrangement and installation of the stove body. The water jacket sleeve arranged on the outer periphery of the feed barrel can effectively protect the feed barrel and the fuel inside, and avoid excessive heat of the flue gas in the flue from being transferred to the fuel and causing the fuel to burn in the feed barrel, thereby achieving the effect of the fuel smoothly entering the furnace for full combustion, and avoiding the loss of fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic structural diagram of a first embodiment of a heat exchange biomass fuel furnace provided by an embodiment of the present invention;

[0018] Figure 2 A schematic structural diagram of a second embodiment of a heat exchange biomass fuel furnace provided in an embodiment of the present invention;

[0019] Figure 3 for Figure 1 A schematic diagram of the main cross-sectional structure of the middle burner;

[0020] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of AA.

[0021] In the figure: 100, furnace body; 110, furnace chamber; 111, grate; 120, burner; 121, air collecting section; 122, combustion section; 123, air collecting hole; 124, air inlet hole; 130, first water exchange water jacket; 140, smoke hood; 141, baffle; 150, air delivery cavity; 160, air supply pipe; 170, ash discharge door; 200, feed barrel; 210, storage box; 220, water jacket casing; 300, second water exchange water jacket; 310, heat exchange cavity; 320, heat exchange tube; 400, flue; 410, smoke exhaust pipe. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Please also read Figures 1 to 4The heat exchange biomass fuel stove provided by the present invention is now described. The heat exchange biomass fuel stove comprises a stove body 100, a feed tube 200, a second heat exchange water jacket 300 and a flue 400. A furnace 110 for accommodating biomass fuel is provided inside the stove body 100. A burner 120 extending downward is suspended at the stove mouth of the stove body 100. A first heat exchange water jacket 130 is provided on the periphery of the stove body 100. A smoke hood 140 is provided above the stove mouth. The second heat exchange water jacket 300 is arranged on the side of the stove body 100 and a heat exchange cavity 310 is provided inside. A heat exchange tube 320 is provided in the heat exchange cavity 310. The second heat exchange water jacket 300 and the heat exchange tube 320 are provided in the heat exchange cavity 310. The first heat exchange water jacket 130 is connected, and the second heat exchange water jacket 300 is also provided with a smoke exhaust pipe 410 for connecting the heat exchange chamber 310 and the outside; the feed barrel 200 is arranged through the side wall of the furnace body 100 and the lower end is connected with the furnace 110; a part of the tube wall of the feed barrel 200 is located in the heat exchange chamber 310, and the outer periphery of the tube wall of the feed barrel 200 located in the heat exchange chamber 310 is provided with a water jacket sleeve 220 connected to the second heat exchange water jacket 300; the flue 400 is arranged on the second heat exchange water jacket 300 and is used to connect the smoke hood 140 and the heat exchange chamber 310. It should be noted that when an element is referred to as being "arranged on" another element, it can be directly on the other element or indirectly on the other element. The terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] Compared with the prior art, the heat exchange biomass fuel stove provided by the present invention can effectively reduce the footprint of the furnace body 100 by arranging the second water exchange water jacket 300 and the feed barrel 200 on the same side of the furnace body 100, which is convenient for the layout and installation of the furnace body 100. The water jacket sleeve 220 arranged on the outer periphery of the feed barrel 200 is connected to the second water exchange water jacket 300, which can effectively utilize the thermal energy on the one hand, and effectively protect the feed barrel 200 and the fuel inside on the other hand, avoiding excessive transfer of heat from the flue gas in the flue 400 to the fuel and causing combustion of the fuel in the feed barrel 200, thereby achieving the effect of smooth entry of the fuel into the furnace 110 for full combustion, thereby avoiding fuel loss.

[0025] Please also read Figure 1 to Figure 2As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, a grate 111 is provided at the bottom of the furnace 110, and the furnace body 100 is located below the grate 111 as an ash storage chamber, and the furnace body 100 is provided with an ash outlet, and the furnace body 100 is detachably connected with an ash outlet door 170, and the ash outlet door 170 is sealed and connected to the furnace body 100. The grate 111 is used to support the biomass fuel above and store the ash of the biomass fuel. After a period of use, when the ash accumulates to a certain extent, the ash outlet door 170 is opened to remove the ash. The ash outlet door 170 is set on a side away from the second water exchange water jacket 300 to avoid position interference with it, which is convenient for subsequent ash cleaning operations.

[0026] During actual use, the ash discharge door 170 is in a closed state, and the sealing of the ash storage chamber needs to be ensured. The air in the furnace 110 for achieving incomplete combustion of the biomass fuel comes from the feed barrel 200. The gas supplied through the feed barrel 200 causes the biomass fuel to be incompletely burned. This is different from the traditional method of incomplete combustion of the biomass fuel by introducing gas from the ash storage chamber. This is because the biomass fuel will burn violently when a large amount of gas is supplied, which will cause energy waste and is not conducive to the effective use of thermal energy. When the gas is introduced through the feed barrel 200, the amount of gas introduced is much smaller than the form of directly introducing gas from below, which is convenient for achieving effective control of the flow rate of the supplied airflow, thereby achieving full utilization of the heat generated by the biomass fuel. During use, the tightness of the seal between the ash discharge door 170 and the furnace body 100 must be ensured to avoid the entry of airflow. The ash discharge door 170 and the furnace body 100 are sealed and connected by providing a sealing gasket on the surface where the ash discharge door 170 contacts the furnace body 100, so as to ensure that the space of the ash storage chamber is in a closed form, thereby ensuring that the amount of gas supplied is within a suitable flow range. In this embodiment, the lower end of the feed barrel 200 is in the form of extending to the interior of the furnace 110, which can achieve stable delivery of biomass fuel. At the same time, since the gas for the combustion of biomass fuel is supplied from the feed barrel 200, it is equivalent to that the incomplete combustion of biomass fuel has begun at the lower end of the feed barrel 200, which is equivalent to expanding the volume of the furnace 110 to a certain extent, increasing the reaction space of the combustible gas, and facilitating the generation of combustible gas.

[0027] Please also read Figure 1 to Figure 2As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, a storage box 210 is provided at the upper end of the feed barrel 200, and a storage box cover is hinged on the top of the storage box 210. The storage box 210 is used to contain a certain amount of biomass fuel, and continuously supply it to the furnace 110 through the feed barrel 200. The setting of the storage box cover can achieve the function of controlling the size of the upper opening of the storage box 210. The storage box cover can be set in a form of sliding connection with the storage box 210, or it can be set in a form of hinged connection with the storage box 210. When the sliding connection is used, the size of the opening above the storage box 210 can be controlled by sliding the storage box cover to different positions, thereby achieving accurate control of the amount of gas entering the furnace 110 through the feed barrel 200, and achieving full combustion and utilization of the biomass fuel.

[0028] Please also read Figure 1 , Figure 2 and Figure 4 As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, a baffle 141 is provided in the smoke hood 140, the plate surface of which is arranged in the up-down direction and is located between the flue 400 and the furnace mouth. The baffle 141 provided in the smoke hood 140 can effectively block the combustible gas burning in the flue 400 and the furnace mouth, and avoid the adverse effect of the combustible gas combustion on the heating of the biomass fuel in the feed barrel 200 in the second water exchange water jacket 300, thereby achieving effective protection of the biomass fuel in the feed barrel 200 and the storage box 210, and also avoiding the problem of the combustible gas entering the flue 400 without being fully burned.

[0029] Please also read Figure 1 , Figure 2 and Figure 4 As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, the baffle 141 is arranged away from the inlet end of the smoke hood 140. While the baffle 141 blocks the combustible gas burning at the flue 400 and the furnace mouth, it cannot affect the smooth discharge of smoke when the combustible gas burns. Therefore, the baffle 141 is connected to the top plate of the inner wall of the smoke hood 140 at the upper end and the bottom plate of the smoke hood 140 at the lower end, and should also avoid the inlet end of the smoke hood 140 to ensure that the smoke can be smoothly discharged to the heat exchange cavity 310 of the second water exchange water jacket 300 through the flue 400, so as to achieve effective heating of the heat exchange tube 320.

[0030] Please also read Figure 1 to Figure 2As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, the exhaust pipe 410 is located at the side of the heat exchange chamber 310 away from the furnace body 100 and penetrates the second heat exchange water jacket 300, and the main axis of the exhaust pipe 410 is lower than the main axis of the flue 400. The exhaust pipe 410 discharges the flue gas sent into the heat exchange chamber 310 by the flue 400 to the outside. Since the flue 400 is connected to the inside of the smoke hood 140, the height of the flue 400 is located at the upper position of the second heat exchange water jacket 300. In order to achieve effective heat exchange between the flue gas and the heat exchange tube 320 and to achieve effective heat transfer to the heat exchange tube 320, the exhaust pipe 410 is set at the lower position of the second heat exchange water jacket 300, and the formation of the flue gas in the heat exchange chamber 310 is extended to the maximum extent, so as to achieve full utilization of the heat.

[0031] Please also read Figures 1 to 3 As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, the burner 120 includes an air collecting portion 121 extending into the interior of the biomass material and a combustion portion 122 connected to the upper end of the air collecting portion 121, and the combustion portion 122 is mounted on the furnace mouth of the furnace 110. The upper outer periphery of the combustion portion 122 is provided with a plurality of air inlet holes 124 arranged along the circumferential direction, and the outer periphery of the furnace mouth is provided with an air delivery cavity 150 connected to the air inlet holes 124, and the air delivery cavity 150 is connected to the outside through an air supply pipe 160. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined. The burner 120 is arranged to effectively collect the combustible gas generated by the incomplete combustion of the biomass fuel in the furnace 110, and guide it to the intersection to realize the combustion of the combustible gas, and then generate heat energy for subsequent heating and other occasions. The burner 120 can be in the form of a cylindrical tubular component with a main axis arranged in the up-down direction. The lower end of the burner 120 is in the form of extending into the biomass fuel, which can realize the effective collection of the combustible gas and the transportation of the combustible gas from bottom to top. In this embodiment, the air inlet 124 arranged on the periphery of the combustion part 122 can introduce the air outside the furnace body 100 into the furnace mouth, realize full contact with the combustible gas, and achieve a good combustion and heat release effect. When the combustible gas burns at the furnace mouth, the air pressure at the furnace mouth is relatively lower than the external air pressure, and the air reaches the furnace mouth from the outside through the air supply pipe 160, providing oxygen for the combustible gas continuously, ensuring a large combustion effect. The inlet end of the air supply pipe 160 is set to be lower than the outlet end of the air supply pipe 160, which can realize the gas entering from the bottom and exiting from the top, and can ensure a good circulation effect, thereby ensuring the full combustion of the combustible gas.

[0032] Please also read Figures 1 to 3As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, the diameter of the gas collecting part 121 gradually increases from bottom to top, and a plurality of gas collecting holes 123 arranged along the circumferential direction are provided on the outer wall of the gas collecting part 121. When the lower end of the gas collecting part 121 extends into the interior of the biomass fuel, in order to facilitate the combustible gas to enter the combustion part 122 from the lower opening of the gas collecting part 121, the outer periphery of the gas collecting part 121 is provided with the gas collecting holes 123 that penetrate inside and outside, so that the combustible gas generated by the incomplete combustion of the biomass fuel can conveniently enter the interior of the gas collecting part 121 from the gas collecting holes 123, thereby improving the collection efficiency of the combustible gas and ensuring the continuous supply of the combustible gas.

[0033] Please also read Figure 1 to Figure 2 As a specific embodiment of the heat exchange biomass fuel stove provided by the present invention, a plurality of air inlet holes 124 arranged circumferentially are provided on the upper periphery of the combustion part 122, and an air delivery cavity 150 connected to the air inlet holes 124 is provided on the periphery of the furnace mouth, and the air delivery cavity 150 is connected to the outside through an air supply pipe 160. The air delivery cavity 150 is used to supply oxygen to the combustible gas at the furnace mouth, so as to achieve full combustion of the combustible gas at the furnace mouth and generate heat. The air supply pipe 160 is located on the side of the furnace mouth away from the flue 400.

[0034] The air supply pipe 160 in this embodiment is arranged on a side away from the flue 400, so that the gas supply from the air supply pipe 160 to the furnace mouth, the combustion of the combustible gas, and the exhaust of the flue 400 can be completed in sequence, which is convenient for improving the combustion efficiency. If the air supply pipe 160 and the flue 400 are arranged on the same side, the air flow between the intake air flow and the exhaust flue gas will collide, making it difficult to ensure the full combustion of the combustible gas and easily causing waste of the combustible gas. Therefore, the air supply pipe 160, the furnace mouth and the flue 400 are arranged in a straight line to improve the combustion efficiency.

[0035] The above are only preferred embodiments of the present invention and are 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 heat exchange biomass fuel furnace, characterized in that: include: A furnace body (100) is provided with a furnace chamber (110) for accommodating biomass fuel inside, a burner (120) extending downward is suspended at the furnace mouth of the furnace body (100), a first heat exchange water jacket (130) is provided on the outer periphery of the furnace body (100), and a smoke hood (140) is provided above the furnace mouth; A second water exchange jacket (300) is arranged on the side of the furnace body (100) and is provided with a heat exchange cavity (310) therein, wherein a heat exchange pipe (320) is provided in the heat exchange cavity (310); the second water exchange jacket (300) is in communication with the first water exchange jacket (130), and the second water exchange jacket (300) is also provided with a smoke exhaust pipe (410) for connecting the heat exchange cavity (310) with the outside; A feed cylinder (200) is arranged to penetrate the side wall of the furnace body (100) and the lower end of which is in communication with the furnace (110); a portion of the tube wall of the feed cylinder (200) is located in the heat exchange cavity (310), and the outer periphery of the tube wall of the feed cylinder (200) located in the heat exchange cavity (310) is sheathed with a water jacket sleeve (220) in communication with the second water exchange water jacket (300); a flue (400) disposed on the second water exchange heat jacket (300) and used to connect the smoke hood (140) and the heat exchange chamber (310); the smoke exhaust pipe (410) is located on a side of the heat exchange chamber (310) away from the furnace body (100) and is disposed through the second water exchange heat jacket (300); and the main axis of the smoke exhaust pipe (410) is lower than the main axis of the flue (400); A baffle (141) is provided in the smoke hood (140) and has a plate surface arranged in the up-down direction and located between the smoke duct (400) and the furnace opening. The baffle (141) is arranged away from the inlet end of the smoke hood (140). An air supply pipe (160) is provided on a side of the furnace opening away from the smoke duct (400).

2. The heat exchange biomass fuel stove according to claim 1, characterized in that: A grate (111) is provided at the bottom of the furnace chamber (110); an ash storage chamber is provided below the grate (111) of the furnace body (100); an ash outlet is provided on the furnace body (100); an ash outlet door (170) is detachably connected to the furnace body (100); and the ash outlet door (170) is sealedly connected to the furnace body (100).

3. The heat exchange biomass fuel stove according to claim 1, characterized in that: A material storage box (210) is provided at the upper end of the material feeding cylinder (200), and a material storage box cover is hingedly connected to the top of the material storage box (210).

4. The heat exchange biomass fuel stove according to any one of claims 1 to 3, characterized in that: The burner (120) comprises an air collecting portion (121) extending into the interior of the furnace (110) and a combustion portion (122) connected to the upper end of the air collecting portion (121); the combustion portion (122) is mounted on a furnace opening of the furnace (110).

5. The heat exchange biomass fuel stove according to claim 4, characterized in that: The diameter of the gas collecting portion (121) gradually increases from bottom to top, and a plurality of gas collecting holes (123) arranged in a circumferential direction are provided on the outer wall of the gas collecting portion (121).

6. The heat exchange biomass fuel stove according to claim 4, characterized in that: The upper periphery of the combustion portion (122) is provided with a plurality of air inlet holes (124) arranged in a circumferential direction, and the periphery of the furnace mouth is provided with an air delivery cavity (150) connected to the air inlet holes (124), and the air delivery cavity (150) is connected to the outside through an air supply pipe (160).

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