Novel gasification combustion chamber and biomass pellet combustion furnace

Abstract

The utility model provides a novel gasification combustion chamber and biomass pellet combustion furnace, including combustion chamber cavity, circular combustion pipe, circular combustion pipe verticality is arranged inside the combustion chamber cavity, is provided with a plurality of air inlet hole in the outside wall middle part and upper area of circular combustion pipe, is provided with one fire collecting opening in the upper portion of combustion chamber cavity, and the fire collecting opening is located above circular combustion pipe, is provided with the air vent that passes through with the combustion chamber cavity inside on the lateral wall of combustion chamber cavity. Biomass pellet combustion furnace includes above -mentioned novel gasification combustion chamber, auger feed pipe and installation casing. The internal structure design of this gasification combustion chamber is favorable to form gasification combustion, thereby can improve the combustion effect of biomass pellet, and then is favorable to improve the heating effect of combustion furnace.

Description

Technical Field

[0001] This utility model relates to the field of biomass pellet combustion furnace technology, specifically to a novel gasification combustion chamber and biomass pellet combustion furnace. Background Technology

[0002] Biomass fuel pellets are generally made from agricultural and forestry waste (such as straw, sawdust, bagasse, and rice husks) through processes such as crushing, mixing, extrusion, and drying. They have high combustion thermal efficiency, and biomass fuel pellets are also space-saving and easy to transport, thus they are widely used as fuel for heating stoves. Currently, heating stoves on the market come in various structural forms, but they generally suffer from unreasonable combustion chamber designs, which affect the combustion efficiency of biomass fuel pellets and consequently the heating effect of the stove. Utility Model Content

[0003] The purpose of this invention is to provide a novel gasification combustion chamber and biomass pellet combustion furnace. The internal structure of the gasification combustion chamber is designed to facilitate gasification combustion, thereby improving the combustion effect of biomass pellets and consequently improving the heating effect of the combustion furnace.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a novel gasification combustion chamber, including a combustion chamber cavity and a circular combustion tube. The circular combustion tube is vertically arranged inside the combustion chamber cavity. Several air inlets are provided in the middle and upper regions of the outer side wall of the circular combustion tube. A flame concentrator is provided in the upper part of the combustion chamber cavity. The flame concentrator is located above the circular combustion tube. A vent is provided on the side wall of the combustion chamber cavity that communicates with the interior of the combustion chamber cavity.

[0005] Preferably, a partition is provided in the combustion chamber cavity, the partition dividing the combustion chamber cavity into an upper cavity and a lower cavity, and the partition is sleeved on the outer wall of the circular combustion pipe, and the vent is in communication with the upper cavity.

[0006] Furthermore, the inner diameter of the fire-gathering port is L1, and the inner diameter of the circular combustion tube is L2, where L2 > L1.

[0007] Furthermore, the combustion chamber is composed of an i-shaped plate, a rear sealing plate, a flame concentrator top plate, and a dust removal plate. The rear sealing plate seals the rear opening of the i-shaped plate, the flame concentrator top plate seals the upper opening of the i-shaped plate, the flame concentrator is located on the flame concentrator top plate, and the dust removal plate seals the lower opening of the i-shaped plate and can move freely back and forth relative to the i-shaped plate.

[0008] Furthermore, a ventilation port is provided on both the left and right sides of the shaped plate.

[0009] Furthermore, the top plate of the fire-gathering port can be freely separated from the shaped plate, and the top plate of the fire-gathering port is fixedly connected to the upper part of the circular combustion tube.

[0010] Furthermore, a vent pipe is fixedly installed on the vent.

[0011] Furthermore, a first through hole is provided on one side of the bottom of the circular combustion tube, the first through hole enabling communication between the interior of the circular combustion tube and the lower cavity. A second through hole corresponding to the first through hole is provided on the shaped plate. A fixed tube is fixedly installed in the first through hole and the second through hole, and an ignition rod is installed in the fixed tube.

[0012] A biomass pellet combustion furnace includes the novel gasification combustion chamber described above. The furnace also includes an auger feed pipe and a mounting shell. The discharge end of the auger feed pipe is fixedly disposed on the upper part of the rear sealing plate and located above and behind the fire-gathering port. A chute is provided between the discharge end of the auger feed pipe and the fire-gathering port. The rear sealing plate is clamped inside the rear side of the U-shaped groove of the mounting shell. The outer ends of the vent pipe and the fixing pipe are sleeved on the corresponding side wall of the U-shaped groove. The rear part of the auger feed pipe is sleeved inside the upper part of the rear side wall of the U-shaped groove.

[0013] The beneficial effects of this utility model are as follows: The utility model has a simple structure, facilitating processing and manufacturing; the sealing of the bottom opening of the circular combustion tube by the ash-removing plate and the isolation of the oxygen-deficient area at the lower end of the circular combustion tube by the baffle plate facilitate the formation of a gasification and pyrolysis environment at the bottom of the circular combustion tube by the burning biomass particles, thereby achieving effective production of combustible gases; a small number of air inlets are provided at the upper part of the circular combustion tube, which facilitates the formation of a limited oxygen environment at the upper part of the internal structure of the circular combustion tube, allowing the generated combustible gases to react with the limited oxygen, thus achieving gasification combustion and releasing a large amount of heat, thereby improving the heating effect of the heating furnace; the top plate of the fire-gathering port is fixedly connected to the circular combustion tube, and the top plate of the fire-gathering port and the shaped plate can be freely separated, facilitating direct replacement of the top plate of the fire-gathering port and the circular combustion tube during daily use; by directly pulling out the ash-removing plate, the ash and slag inside the circular combustion tube can be easily discharged from the bottom of the circular combustion tube, thereby improving the convenience of ash removal. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the gasification combustion chamber; Figure 2 This is a longitudinal sectional view of the overall structure of the gasification combustion chamber; Figure 3 This is a schematic diagram of a second specific embodiment of the gasification combustion chamber; Figure 4 This is a structural side view of a second specific embodiment of the gasification combustion chamber; Figure 5 This is a partial structural diagram of a biomass pellet combustion furnace; In the figure: 1 Combustion chamber cavity, 11] shaped plate, 111 air vent, 112 second through hole, 12 rear sealing plate, 121 third through hole, 13 top plate of the fire-gathering port, 131 fire-gathering port, 14 ash-removing plate, 15 partition plate, 2 circular combustion pipe, 21 air inlet, 22 first through hole, 101 upper cavity, 102 lower cavity, 3 vent pipe, 4 fixed pipe, 41 ignition rod, 5 screw conveyor feeding pipe, 6 mounting shell, 7 chute. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some preferred embodiments of the present invention, and not all embodiments. Those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] This utility model provides a novel gasification combustion chamber (such as...) Figure 1As shown, the combustion chamber includes a combustion chamber 1 and a circular combustion tube 2. Both the combustion chamber 1 and the circular combustion tube 2 are made of steel. In this specific embodiment, the combustion chamber 1 has a square structure. The circular combustion tube 2 is vertically arranged inside the combustion chamber 1. Several air inlets 21 are provided in the middle and upper regions of the outer side wall of the circular combustion tube 2. A flame concentrator 131 is provided at the upper part of the combustion chamber 1. The flame concentrator 131 is located above the circular combustion tube 2. In actual application, the upper flame of the biomass pellets burning in the circular combustion tube 2 can burst out from the flame concentrator 131. A vent 111 communicating with the interior of the combustion chamber 1 is provided on the side wall of the combustion chamber 1. In practical applications, the bottom of the circular combustion tube 2 is almost in contact with the inner bottom surface of the combustion chamber 1, resulting in an oxygen-deficient environment for the biomass particles at the lower end of the circular combustion tube 2 during combustion. This facilitates the formation of a gasification and pyrolysis environment at the bottom of the circular combustion tube 1. In practical applications, the distance between the bottom of the circular combustion tube 2 and the inner bottom surface of the combustion chamber 1 can be set between 0.5-2mm. In the gasification and pyrolysis environment, the burning biomass particles can effectively produce combustible gases. Oxygen is transported into the combustion chamber 1 using the vent 111. Because the number of air inlets 21 in the middle and upper parts of the circular combustion tube 2 is relatively small, a limited oxygen environment is formed in the middle and upper parts of the circular combustion tube 2. The combustible gas generated at the bottom of the circular combustion tube 2 undergoes a combustion reaction under high temperature and limited oxygen conditions, thereby achieving gasification and combustion and releasing a large amount of heat, which helps to improve the heating effect of the heating furnace. In this specific embodiment, three rows of air intake holes can be provided in the middle and upper regions of the circular combustion tube 2. The three rows of air intake holes are distributed at equal intervals, and each group of air intake holes includes 8 air intake holes 21. The 8 air intake holes 21 are distributed at equal intervals along the circumference of the circular combustion tube 2.

[0018] Based on the above embodiments, to facilitate a better oxygen-deficient environment at the bottom of the circular combustion tube 2, a baffle 15 is provided inside the combustion chamber cavity 1. The four circumferential sidewalls of the baffle 15 are substantially in contact with the corresponding four internal sidewalls of the combustion chamber cavity 1. The baffle 15 divides the combustion chamber cavity 1 into an upper cavity 101 and a lower cavity 102, and the baffle 15 is fitted onto the outer sidewall of the circular combustion tube 2. In practical applications, this facilitates the replacement of the circular combustion tube 2. This allows the circular combustion tube 2 to be flexibly extracted from the partition 15; the vent 111 is connected to the upper cavity 101, and the oxygen in the vent 111 cannot smoothly enter the lower cavity 102 due to the obstruction of the partition 15, thereby effectively isolating the oxygen inside the lower cavity 102; the oxygen in the vent 111 enters the middle and upper regions inside the circular combustion tube 2 through the air inlet 21, thereby facilitating the formation of a limited oxygen environment in the middle and upper regions inside the circular combustion tube 2.

[0019] Based on the above embodiments, the specific implementation method of the flame-gathering port 131 to achieve flame gathering is as follows: the inner diameter of the flame-gathering port 131 is L1, and the inner diameter of the circular combustion tube 2 is L2, where L2 > L1. Since the inner diameter of the flame-gathering port 131 is smaller than the inner diameter of the circular combustion tube 2, when the flame in the circular combustion tube 2 bursts out of the flame-gathering port 131, the flame also shrinks due to the contraction of the inner diameter of the flame-gathering port 131, thereby achieving flame gathering. In actual processing, L2 can be 10 mm larger than L1.

[0020] Based on the above embodiments, the specific implementation of the combustion chamber cavity 1 is as follows: the combustion chamber cavity 1 is composed of a shaped plate 11, a rear sealing plate 12, a flame concentrator top plate 13, and a dust removal plate 14. The rear sealing plate 12 seals the rear opening of the shaped plate 11. Specifically, a plurality of insertion slots are provided on the rear sealing plate 12, and insertion plates corresponding to the insertion slots are provided on the rear side wall of the shaped plate 11. After the insertion plates are inserted into the corresponding insertion slots, the shaped plate can be welded to achieve the desired shape. 11 is fixedly connected to the rear sealing plate 12; the fire-gathering port top plate 13 seals the upper opening of the 11-shaped plate, the fire-gathering port 131 is set on the fire-gathering port top plate 13, and the dust-removing plate 14 seals the lower opening of the 11-shaped plate and can move freely back and forth relative to the 11-shaped plate. Specifically, an extension plate bent inward at 90 degrees can be set on the left and right sides of the bottom of the 11-shaped plate, and the dust-removing plate 14 is locked above the two extension plates.

[0021] Based on the above embodiments, in order to improve the combustion stability of biomass pellets when they are burned in the circular combustion tube 2, a vent 111 is provided on both the left and right sides of the circular plate 11.

[0022] Furthermore, to facilitate convenient maintenance and replacement of the circular combustion tube 2, the flame-gathering top plate 13 and the circular plate 11 can be freely separated. The flame-gathering top plate 13 is fixedly connected to the upper part of the circular combustion tube 2. Specifically, the flame-gathering top plate 13 is made of steel plate, and the circular combustion tube 2 is an iron pipe. The flame-gathering top plate 13 and the circular combustion tube 2 are fixedly connected together by welding. The flame-gathering top plate 13 and the circular combustion tube 2 can be an integral casting. During the casting process, it is necessary to ensure that the inner diameter of the flame-gathering port 131 is smaller than the inner diameter of the circular combustion tube 2.

[0023] To facilitate the entry of outside air into the upper cavity 101 through the vent 111, a vent pipe 3 is fixedly installed on the vent 111.

[0024] In practical applications, to facilitate the ignition of biomass pellets inside the circular combustion tube 2, a first through hole 22 is provided on one side of the bottom of the circular combustion tube 2. The first through hole 22 is U-shaped and penetrates the bottom sidewall of the circular combustion tube 2. The first through hole 22 enables communication between the inside of the circular combustion tube 2 and the lower cavity 102. A second through hole 112 corresponding to the first through hole 22 is provided on the 1-shaped plate 11. A fixed tube 4 is fixedly installed in the first through hole 22 and the second through hole 112. An ignition rod 41 is installed in the fixed tube 4. The front end of the ignition rod 41 is located inside the circular combustion tube 2, and ignition can be achieved by using the ignition rod 41.

[0025] This utility model also provides a biomass pellet combustion furnace, including the novel gasification combustion chamber described above. The furnace further includes an auger feed pipe 5 and a mounting housing 6. The auger feed pipe 5 is a commonly used fuel auxiliary conveying component in existing biomass pellet combustion furnaces, which cooperates with a screw conveyor shaft to convey materials. The discharge end of the auger feed pipe 5 is fixedly disposed on the upper part of the rear sealing plate 12 and located above and behind the fire-gathering port 131. Specifically, a third through hole 121 is provided on the upper part of the rear sealing plate 12, and the discharge end of the auger feed pipe 5 is sleeved and fixed on the third through hole 121. The three through holes 121 are connected; a chute 7 is provided between the discharge end of the screw conveyor pipe 5 and the fire-gathering port 131. In actual application, the biomass pellets flowing out from the discharge end of the screw conveyor pipe 5 can fall directly into the circular combustion tube 2 by the guiding effect of the chute 7, thereby realizing the fuel supply of the circular combustion tube 2; the rear sealing plate 12 is inserted into the rear side of the U-shaped groove of the mounting housing 6, the outer ends of the vent pipe 3 and the fixing pipe 4 are sleeved on the corresponding side wall of the U-shaped groove, and the rear part of the screw conveyor pipe 5 is sleeved in the upper part of the rear side wall of the U-shaped groove.

[0026] In this utility model, "upper", "lower", "front", "back", "left", and "right" are all relative positions used to facilitate the description of positional relationships, and therefore cannot be understood as absolute positions as limitations on the scope of protection.

[0027] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

[0028] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. For those skilled in the art, several improvements and modifications can be made without departing from the concept of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A novel gasification combustion chamber, characterized in that, It includes a combustion chamber cavity and a circular combustion tube. The circular combustion tube is vertically arranged inside the combustion chamber cavity. Several air inlets are provided in the middle and upper regions of the outer side wall of the circular combustion tube. A flame concentrator is provided in the upper part of the combustion chamber cavity, which is located above the circular combustion tube. A vent is provided on the side wall of the combustion chamber cavity that communicates with the interior of the combustion chamber cavity.

2. The novel gasification combustion chamber according to claim 1, characterized in that, in A partition is provided inside the combustion chamber, which divides the combustion chamber into an upper chamber and a lower chamber. The partition is sleeved on the outer wall of the circular combustion pipe, and the vent is in communication with the upper chamber.

3. The novel gasification combustion chamber according to claim 2, characterized in that, The inner diameter of the fire-gathering port is L1, and the inner diameter of the circular combustion tube is L2, where L2 > L1.

4. The novel gasification combustion chamber according to claim 3, characterized in that, The combustion chamber is composed of a shaped plate, a rear sealing plate, a flame concentrator top plate, and a dust removal plate. The rear sealing plate seals the rear opening of the shaped plate, the flame concentrator top plate seals the upper opening of the shaped plate, the flame concentrator is located on the flame concentrator top plate, and the dust removal plate seals the lower opening of the shaped plate and can move freely back and forth relative to the shaped plate.

5. The novel gasification combustion chamber according to claim 4, characterized in that, A ventilation port is provided on both the left and right sides of the shaped plate.

6. The novel gasification combustion chamber according to claim 5, characterized in that, The top plate of the fire-gathering port can be freely separated from the shaped plate, and the top plate of the fire-gathering port is fixedly connected to the upper part of the circular combustion tube.

7. The novel gasification combustion chamber according to claim 6, characterized in that, A vent pipe is fixedly installed on the vent.

8. The novel gasification combustion chamber according to claim 7, characterized in that, in A first through hole is provided on one side of the bottom of the circular combustion tube, which enables communication between the interior of the circular combustion tube and the lower cavity. A second through hole corresponding to the first through hole is provided on the shaped plate. A fixed tube is fixedly installed in the first through hole and the second through hole, and an ignition rod is installed in the fixed tube.

9. A biomass pellet combustion furnace, characterized in that, The combustion furnace includes a novel gasification combustion chamber according to claim 8, and further includes an auger feed pipe and a mounting housing. The discharge end of the auger feed pipe is fixedly disposed on the upper part of the rear sealing plate and located above and behind the fire-gathering port. A chute is provided between the discharge end of the auger feed pipe and the fire-gathering port. The rear sealing plate is fitted inside the rear side of the U-shaped groove of the mounting housing. The outer ends of the vent pipe and the fixing pipe are sleeved on the corresponding side wall of the U-shaped groove. The rear part of the auger feed pipe is sleeved inside the upper part of the rear side wall of the U-shaped groove.

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