Combustion device

Abstract

The invention discloses a combustion device, comprising: a hearth, the bottom of which is provided with a secondary combustion chamber; the first-stage combustion chamber is arranged on one side of the bottom of the hearth and communicates with the second-stage combustion chamber, a feeding channel is arranged on the side, deviating from the second-stage combustion chamber, of the upper side of the first-stage combustion chamber, and an ignition structure is installed on the side wall of the feeding channel; the feeding mechanism is provided with an output port communicated with the feeding channel; and the air supply mechanism is used for conveying air to the first-stage combustion chamber and the second-stage combustion chamber. By arranging the first-stage combustion chamber and the second-stage combustion chamber, staged control over the combustion process is achieved, the combustion condition is optimized, and therefore the combustion efficiency is improved, and energy waste is reduced; the condition that the bottom of a single combustion chamber is blocked is improved, particularly, gas and fine particles are generally combusted in the second-stage combustion chamber, and the bottom is not prone to being blocked; and the ignition structure is mounted on the side wall of the feeding channel, so that ignition can be performed without manually opening the furnace door, and the starting efficiency and safety of the combustion device are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of combustion furnaces, and in particular to a combustion device. Background Art

[0002] Agricultural dryer is one of the traditional drying equipment, widely used in grain, food and other fields. It effectively solves the problem of grain mildew caused by weather reasons through its reliable operation, large operational flexibility, strong adaptability and large processing capacity, ensuring that grain particles are stored in the warehouse. The heat source of the agricultural dryer comes from the combustion device. With the development of technology, biomass fuel is more and more widely used in grain drying. Biomass fuels such as straw and rice husks can be used as heat sources for dryers, which have the advantages of low cost and renewable. However, the existing combustion device usually only has one combustion chamber, and the bottom of the combustion chamber is easily blocked, which makes it difficult for fresh air to enter, affecting combustion. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a combustion device.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A combustion device comprises: a furnace with a secondary combustion chamber at the bottom; a primary combustion chamber arranged at one side of the furnace bottom and connected to the secondary combustion chamber, a feed channel is arranged on the upper side of the primary combustion chamber away from the secondary combustion chamber, and an ignition structure is installed on the side wall of the feed channel; a feeding mechanism is provided with an output port connected to the feed channel and used for inputting raw materials into the feed channel; and an air supply mechanism is used to transport air to the primary combustion chamber and the secondary combustion chamber.

[0006] Furthermore, air inlets are provided at the bottom of the primary combustion chamber and the secondary combustion chamber; and the air supply mechanism is used to supply air to the primary combustion chamber and the secondary combustion chamber through the air inlets.

[0007] Furthermore, the air supply mechanism includes a blower, a main air box and an auxiliary air box. The main air box is arranged at the bottom of the primary combustion chamber for supplying air to the primary combustion chamber. The auxiliary air box is arranged at the bottom of the secondary combustion chamber for supplying air to the secondary combustion chamber. The blower, the main air box and the auxiliary air box are connected in sequence.

[0008] Furthermore, the blower has an output pipe, and the output pipe is connected to the main wind box through an extension pipe.

[0009] Further, the feeding mechanism includes a first feeding pipe, the output port is arranged at the end of the first feeding pipe, and the peripheral wall of the first feeding pipe away from the output port is provided with an intermediate feeding pipe extending upward, and a first conveying shaft is installed in the first feeding pipe, and the first conveying shaft is provided with spirally extending conveying blades, and the first conveying shaft is connected to a rotating driving mechanism for driving it to rotate, so as to drive the conveying blades to rotate, so as to push the raw materials to move from the bottom of the intermediate feeding pipe toward the output port.

[0010] Furthermore, the upper end of the intermediate feed pipe is connected to a second feed pipe, the second feed pipe is connected to the first feed pipe extending upward, a second conveying shaft is installed in the second feed pipe, the second conveying shaft is provided with spirally extending conveying blades, and the second conveying shaft is connected to a rotating drive mechanism that drives it to rotate, so as to drive the conveying blades to rotate, so as to push the raw materials from the bottom of the first feed pipe toward the intermediate feed pipe.

[0011] Furthermore, a first feed pipe is extended from one end of the first conveying shaft away from the output port and is connected to a first driven wheel, and a second feed pipe is extended from one end of the second conveying shaft away from the middle feed pipe and is connected to a second driven wheel, and the first driven wheel is connected to the second driven wheel by transmission.

[0012] Furthermore, the feed channel includes an inclined side wall with a bottom inclined downward, the inclined side wall is provided with a notch, a horizontal plate is connected to the bottom side of the notch, an end plate extending upward is provided on the side of the horizontal plate away from the notch, the end plate is provided with a avoidance hole, an insert cylinder aligned with the avoidance hole is connected to the outer side of the end plate, and the ignition structure is inserted into the insert cylinder.

[0013] Furthermore, the outer wall of the furnace is provided with heat sinks.

[0014] Furthermore, a furnace door is provided on the side of the furnace bottom facing away from the primary combustion chamber.

[0015] The present invention has the following beneficial effects:

[0016] By setting up the primary combustion chamber and the secondary combustion chamber, the combustion process is controlled in stages, the combustion conditions are optimized, the combustion efficiency is improved, and energy waste is reduced; the primary combustion chamber and the secondary combustion chamber are set up to improve the blockage at the bottom of a single combustion chamber, especially the secondary combustion chamber, which usually burns gas and fine particles, and the bottom is not easy to be blocked; the design of the air supply mechanism can deliver sufficient air to the primary combustion chamber and the secondary combustion chamber, ensuring the oxygen supply required for combustion, thereby improving the completeness and thermal efficiency of combustion. The ignition structure installed on the side wall of the feed channel makes it unnecessary to manually open the furnace door for ignition, which improves the starting efficiency and safety of the combustion device.

[0017] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a schematic diagram of the internal structure of an embodiment of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the feeding channel;

[0021] Figure 3 It is a structural diagram of the feeding mechanism;

[0022] Figure 4 is an axonometric diagram of an embodiment of the present invention;

[0023] Figure 5 is a side view of an embodiment of the present invention;

[0024] Figure 6 is a front view of an embodiment of the present invention;

[0025] Figure 7 2 is a top view of an embodiment of the present invention.

[0026] Legend:

[0027] Furnace 100, secondary combustion chamber 110, heat sink 120, furnace door 130;

[0028] The primary combustion chamber 200, the feed channel 210, the inclined side wall 211, the notch 212, the horizontal plate 213, the end plate 214, the avoidance hole 215, the insert 216, and the ignition structure 220;

[0029] Feeding mechanism 300, output port 310, first feeding pipe 320, middle feeding pipe 321, first conveying shaft 322, first driven wheel 323, second feeding pipe 330, first feeding pipe 331, second conveying shaft 332, second driven wheel 333;

[0030] Air supply mechanism 400 , blower 410 , output pipe 411 , main air box 420 , auxiliary air box 430 . DETAILED DESCRIPTION

[0031] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Please refer to Figure 1 and Figure 2 A combustion device in a preferred embodiment of the present invention includes a furnace 100, a primary combustion chamber 200, a feeding mechanism 300 and an air supply mechanism 400.

[0036] A secondary combustion chamber 110 is provided at the bottom of the furnace 100. A primary combustion chamber 200 is provided at one side of the bottom of the furnace 100 and is connected to the secondary combustion chamber 110. A feed channel 210 is provided on the upper side of the primary combustion chamber 200 away from the secondary combustion chamber 110, and an ignition structure 220 is installed on the side wall of the feed channel 210; the biomass fuel enters the primary combustion chamber 200 from the feed channel 210, and is ignited by the ignition structure 220 when entering, and the biomass fuel is burned in the primary combustion chamber 200, and fine particles and gasified fuel enter the secondary combustion chamber to continue to burn, reducing smoke and improving combustion efficiency.

[0037] The feeding mechanism 300 is provided with an output port 310 communicated with the feeding channel 210 for inputting raw materials into the feeding channel 210 .

[0038] The air supply mechanism 400 is used to supply air to the primary combustion chamber 200 and the secondary combustion chamber 110 .

[0039] The combustion device provided by the present invention realizes hierarchical control of the combustion process and optimizes the combustion conditions by setting a primary combustion chamber 200 and a secondary combustion chamber 110, thereby improving the combustion efficiency and reducing energy waste; the primary combustion chamber 200 and the secondary combustion chamber 110 are set, so that the blockage of the bottom of a single combustion chamber is improved, especially the secondary combustion chamber 110 is usually gas and fine particles for combustion, and the bottom is less likely to be blocked; the design of the air supply mechanism 400 can deliver sufficient air to the primary combustion chamber 200 and the secondary combustion chamber 110, ensuring the oxygen supply required for combustion, thereby improving the completeness and thermal efficiency of combustion. The ignition structure 220 installed on the side wall of the feed channel 210 makes it unnecessary to manually open the furnace door for ignition, thereby improving the starting efficiency and safety of the combustion device. And the ignition position is not in the primary combustion chamber 200, so as to avoid the ignition structure 220 being easily damaged by the heat of the fire in the combustion chamber, and the ignition structure 220 can be a gas ignition spray gun. In addition, the main combustion position is in the primary combustion chamber 200, and the side wall of the primary combustion chamber 200 can be targetedly thickened and made of a fire-resistant material.

[0040] In some embodiments of the present invention, air inlets are provided at the bottom of the primary combustion chamber 200 and the secondary combustion chamber 110; the air supply mechanism 400 is used to supply air to the primary combustion chamber 200 and the secondary combustion chamber 110 through the air inlets. Supplying air from the bottom upward can reduce the blockage of the air inlet at the bottom by materials.

[0041] Reference Figure 1 In some embodiments of the present invention, the air supply mechanism 400 includes a blower 410, a main air box 420 and an auxiliary air box 430. The main air box 420 is disposed at the bottom of the primary combustion chamber 200 for supplying air to the primary combustion chamber 200. The auxiliary air box 430 is disposed at the bottom of the secondary combustion chamber 110 for supplying air to the secondary combustion chamber 110. The blower 410, the main air box 420 and the auxiliary air box 430 are connected in sequence, so that air supply to two combustion chambers can be achieved by one blower 410.

[0042] Reference Figure 1 In some embodiments of the present invention, the blower 410 has an output pipe 411, and the output pipe 411 is connected to the main wind box 420 through an extension pipe 412, so that the blower 410 can be further away from the primary combustion chamber 200 and the secondary combustion chamber 110, which is more convenient to arrange and avoids the temperature emitted from the primary combustion chamber 200 and the secondary combustion chamber 110 causing the temperature of the blower 410 to be too high and affecting the service life.

[0043] Reference Figure 3In some embodiments of the present invention, the feeding mechanism 300 includes a first feeding pipe 320, the output port 310 is arranged at the end of the first feeding pipe 320, and the peripheral wall of the first feeding pipe 320 away from the output port 310 is provided with an intermediate feeding pipe 321 extending upward, and a first conveying shaft 322 is installed in the first feeding pipe 320, and the first conveying shaft 322 is provided with spirally extending conveying blades, and the first conveying shaft 322 is connected to a rotating driving mechanism that drives it to rotate, so as to drive the conveying blades to rotate, so as to push the raw materials from the bottom of the intermediate feeding pipe 321 toward the output port 310, thereby realizing automatic feeding.

[0044] Reference Figure 3 In some embodiments of the present invention, the upper end of the intermediate feed pipe 321 is connected to a second feed pipe 330, the second feed pipe 330 is connected to the first feed pipe 331 extending upward, a second conveying shaft 332 is installed in the second feed pipe 330, the second conveying shaft 332 is provided with spirally extending conveying blades, and the second conveying shaft 332 is connected to a rotating drive mechanism that drives it to rotate, so as to drive the conveying blades to rotate, so as to push the raw materials from the bottom of the first feed pipe 331 to the intermediate feed pipe 321. The second feed pipe 330 and the first feed pipe 320 are used to realize two-stage feeding, so as to avoid fuel backfire, so that fire will come out from the first feed pipe 331, which will affect external safety and interfere with fuel delivery. The biomass fuel enters the second feed pipe 330 from the first feed pipe 331, and then the rotary drive mechanism drives the second conveying shaft 332 to rotate, so that the conveying blades rotate to push the raw material from the bottom of the first feed pipe 331 toward the middle feed pipe 321 and finally fall from the middle feed pipe 321 into the first feed pipe 320. Finally, the rotary drive mechanism drives the first conveying shaft 322 to rotate, pushing the raw material from the bottom of the middle feed pipe 321 toward the output port 310 and finally falling into the feed channel 210.

[0045] Reference Figure 3 In a further embodiment of the present invention, the first conveying shaft 322 extends from the end away from the output port 310 to the first feed pipe 320 and is connected to the first driven wheel 323, and the second conveying shaft 332 extends from the end away from the intermediate feed pipe 321 to the second feed pipe 330 and is connected to the second driven wheel 333. The first driven wheel 323 and the second driven wheel 333 are connected in transmission, so that only one rotating drive mechanism (which can be a motor) can be used to connect one of the first driven wheel 323 and the second driven wheel 333 to simultaneously drive the first conveying shaft 322 and the second conveying shaft 332 to rotate, thereby reducing the number of driving mechanisms and reducing equipment costs. The transmission of the first driven wheel 323 and the second driven wheel 333 can be specifically through gear transmission, chain transmission, belt transmission and other transmission forms.

[0046] Reference Figure 2In a further embodiment of the present invention, the feed channel 210 includes an inclined side wall 211 with a bottom inclined downward, the inclined side wall 211 is provided with a notch 212, the bottom side of the notch 212 is connected to a horizontal plate 213, the side of the horizontal plate 213 away from the notch 212 is provided with an end plate 214 extending upward, the end plate 214 is provided with an avoidance hole 215, and the end plate 214 and the horizontal plate 213 are also connected to side plates on both sides, and the side plates, end plate 214 and horizontal plate 213 close the notch 212 to prevent fuel leakage. The outer side of the end plate 214 is connected to an insert 216 aligned with the avoidance hole 215, and the ignition structure 220 is inserted into the insert 216 to achieve the positioning and installation of the ignition structure 220. The fuel enters the feed channel 210 and flows along the inclined side wall 211, and will stay briefly on the horizontal plate 213. The flame head of the ignition structure 220 is just facing the horizontal plate 213, and will ignite the fuel on the horizontal plate 213. The ignited fuel will push down the horizontal plate 213 under the flow of subsequent fuel, and then enter the primary combustion chamber for combustion. In this way, the fuel has a short time to be ignited by the ignition structure 220, and will not pass through the ignition structure 220 quickly, causing the ignition time to be too short and not burn. Of course, the flame size of the ignition structure 220 can also be increased, so that the fuel can be ignited even if it directly slips into the primary combustion chamber along the inclined side wall 211.

[0047] Reference Figures 4 to 7 In a further embodiment of the present invention, the outer wall of the furnace 100 is provided with heat sinks 120, thereby increasing the heat exchange area and improving the heat dissipation effect.

[0048] Reference Figure 1 In some embodiments of the present invention, a furnace door 130 is provided on the side of the bottom of the furnace 100 facing away from the primary combustion chamber 200, and a furnace door is installed at the furnace door 130, so as to facilitate opening the furnace 100 and cleaning the inside of the furnace 100. It is understandable that an openable chamber door can also be provided on the side wall of the primary combustion chamber 200 to facilitate opening for cleaning.

[0049] 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 combustion device, characterized in that: include: A furnace (100) having a secondary combustion chamber (110) at the bottom; A primary combustion chamber (200) is arranged at one side of the bottom of the furnace (100) and is connected to the secondary combustion chamber (110); a feed channel (210) is arranged on the upper side of the primary combustion chamber (200) away from the secondary combustion chamber (110); an ignition structure (220) is installed on the side wall of the feed channel (210); The feeding mechanism (300) is provided with an output port (310) in communication with the feeding channel (210) and is used to input raw materials into the feeding channel (210); The air supply mechanism (400) is used to supply air to the primary combustion chamber (200) and the secondary combustion chamber (110).

2. The combustion device according to claim 1, characterized in that: The first combustion chamber (200) and the second combustion chamber (110) are both provided with air inlets at the bottom; the air supply mechanism (400) is used to supply air to the first combustion chamber (200) and the second combustion chamber (110) through the air inlets.

3. The combustion device according to claim 2, characterized in that: The air supply mechanism (400) comprises a blower (410), a main air box (420) and an auxiliary air box (430); the main air box (420) is arranged at the bottom of the primary combustion chamber (200) and is used to supply air to the primary combustion chamber (200); the auxiliary air box (430) is arranged at the bottom of the secondary combustion chamber (110) and is used to supply air to the secondary combustion chamber (110); the blower (410), the main air box (420) and the auxiliary air box (430) are connected in sequence.

4. The combustion device according to claim 3, characterized in that: The blower (410) has an output pipe (411), and the output pipe (411) is connected to the main wind box (420) through an extension pipe (412).

5. The combustion device according to claim 1, characterized in that: The feeding mechanism (300) comprises a first feeding pipe (320), the output port (310) is arranged at the end of the first feeding pipe (320), the peripheral wall of the first feeding pipe (320) away from the output port (310) is provided with an intermediate feeding pipe (321) extending upward, a first conveying shaft (322) is installed in the first feeding pipe (320), the first conveying shaft (322) is provided with spirally extending conveying blades, and the first conveying shaft (322) is connected to a rotating driving mechanism for driving the first conveying shaft (322) to rotate, so as to drive the conveying blades to rotate, so as to push the raw materials to move from the bottom of the intermediate feeding pipe (321) toward the output port (310).

6. The combustion device according to claim 5, characterized in that: The upper end of the intermediate feed pipe (321) is connected to a second feed pipe (330), and the second feed pipe (330) is connected to the first feed pipe (331) extending upward. A second conveying shaft (332) is installed in the second feed pipe (330), and the second conveying shaft (332) is provided with spirally extending conveying blades. The second conveying shaft (332) is connected to a rotating drive mechanism for driving it to rotate, so as to drive the conveying blades to rotate, so as to push the raw materials from the bottom of the first feed pipe (331) toward the intermediate feed pipe (321).

7. The combustion device according to claim 6, characterized in that: A first feed pipe (320) extends from one end of the first conveying shaft (322) away from the output port (310) and is connected to a first driven wheel (323); a second feed pipe (330) extends from one end of the second conveying shaft (332) away from the middle feed pipe (321) and is connected to a second driven wheel (333); the first driven wheel (323) and the second driven wheel (333) are connected in a transmission manner.

8. The combustion device according to claim 1, characterized in that: The feed channel (210) comprises an inclined side wall (211) with a bottom inclined downward, the inclined side wall (211) is provided with a notch (212), a horizontal plate (213) is connected to the bottom side of the notch (212), an end plate (214) extending upward is provided on the side of the horizontal plate (213) away from the notch (212), the end plate (214) is provided with an avoidance hole (215), an insert (216) aligned with the avoidance hole (215) is connected to the outer side of the end plate (214), and the ignition structure (220) is inserted into the insert (216).

9. The combustion device according to claim 1, characterized in that: The outer wall of the furnace (100) is provided with heat sinks (120).

10. The combustion device according to claim 1, characterized in that: A furnace door (130) is provided at a side of the bottom of the furnace (100) facing away from the primary combustion chamber (200).

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