Device of producing biomass gasification charcoal not accompanying wood tar

Abstract

To provide a device of producing biomass gasification charcoal not accompanying wood tar.SOLUTION: The device of producing biomass gasification charcoal, comprises a biomass feeding system 1, a carbonizing system 2 of carbonizing biomass, and a multistage cooling system 3 of cooling the biomass charcoal. The feeding system includes a feeding screw conveyor 11 and a hopper 12, the carbonizing system comprises a carbonizing screw conveyor 21 connected to the feeding screw conveyor to gasify the biomass to produce charcoal, a combustion chamber 22 disposed on the outer circumference side of the outer circumferential wall of the carbonizing screw conveyor to combust flammable gas, and flammable gas holes 23 formed on the outer circumferential wall of the carbonizing screw conveyor to communicate the carbonizing screw conveyor and the combustion chamber. The flammable gas generated upon producing charcoal by gasifying the biomass using the carbonizing screw conveyor, flows into the combustion chamber via the flammable gas holes to be combusted therein, and the output port of the carbonizing screw conveyor is connected to the multistage cooling system.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the field of agriculture, and in particular to a biomass gasification carbonization apparatus without wood tar. [Background technology]

[0002] Japan is a traditionally large agricultural nation, and is rich in biomass resources, but there are problems such as environmental pollution and serious waste of biomass resources due to backward biomass processing technology (for example, burning agricultural waste such as stems and leaves in fields). Returning stems and leaves to fields can increase the organic matter in the soil, but at the same time, it can lead to problems such as the inability to remove insect eggs attached to the stems and leaves. On the other hand, these problems can be solved by carbonizing the stems and leaves and then returning them to fields. Materials such as biomass charcoal formed by carbonizing the stems and leaves, as well as various elements, can be used as soil improvement agents, and in particular, after mixing biomass charcoal with agricultural fertilizers and fermenting them, they can be used as high-quality charcoal fertilizer.

[0003] Ordinary stover carbonization equipment has a complicated structure and can be broadly divided into intermittent charcoal production equipment and continuous charcoal production equipment. Intermittent charcoal production equipment has low efficiency. Continuous charcoal production equipment requires drying structure, carbonization structure, combustible gas collection and transportation structure, wood tar collection and separation processing structure, individual combustion chamber structure, waste heat utilization structure, related biomass transportation structure, char cooling structure, etc. to process stover compressed into pieces or granules, which involves a large number of pipelines, transportation and sealing structures, resulting in a complicated overall process structure, a relatively large investment, and a large loss of economic resources.

[0004] Patent Document 1 discloses an apparatus for drying and pyrolysis of stems and leaves. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] China Utility Model No. 209039395 Specification Summary of the Invention [Problem to be solved by the invention]

[0006] However, the drying and pyrolysis device for stems and leaves described in Patent Document 1 has a complex structure and requires separate processing of wood tar, etc.

[0007] The present invention has an object to solve the above-mentioned technical problems in the conventional technology and to provide a biomass gasification carbonization production device that does not involve wood tar. [Means for solving the problem]

[0008] According to the present invention, A biomass gasification carbonization production device that does not involve wood tar, A supply system for transporting biomass; a carbonization system for carbonizing biomass; A multi-stage cooling system for cooling the biomass charcoal, the feed system is located at an input port of the carbonization system and includes a feed screw conveyor and a hopper connected to the feed screw conveyor; The carbonization system is a carbonization screw conveyor connected to the supply screw conveyor for gasifying the biomass to produce charcoal; a combustion chamber provided on the outer peripheral side of the outer peripheral wall of the carbonization screw conveyor for burning a flammable gas; a combustible gas hole formed in an outer peripheral wall of the carbonizing screw conveyor and communicating the carbonizing screw conveyor with the combustion chamber; The combustible gas generated when the biomass is vaporized to produce charcoal in the carbonization screw conveyor enters the combustion chamber through the combustible gas hole and is burned. The output port of the carbonization screw conveyor is connected to a multi-stage cooling system through a biomass charcoal outlet; A biomass gasification carbonization apparatus is provided.

[0009] The biomass gasification carbonization production device of the present invention, which does not involve wood tar, avoids the complicated processes and structures described in Patent Document 1, such as collecting combustible gas, collecting wood tar, separating the wood tar and water, and transporting the combustible gas to the combustion chamber where it is burned, and provides the excellent effect of burning the combustible gas directly, without involving wood tar.

[0010] Preferably, each of the combustion chambers is formed with a combustion chamber air inlet and a combustion chamber exhaust port, and a combustion chamber air introduction cavity for controlling the internal temperature of the combustion chamber is connected to the combustion chamber via the combustion chamber air inlet, and a control valve is installed on the outer wall of the combustion chamber air introduction chamber for adjusting the amount of air entering the combustion chamber air introduction cavity so as to control the internal temperature of the combustion chamber.

[0011] Preferably, the combustion chamber is a cylinder extending along the extension direction of the carbonizing screw conveyor, and a spiral combustion chamber guide plate is installed inside the combustion chamber, centered on the axis of the combustion chamber, thereby achieving the purpose of uniformly heating the carbonizing screw conveyor.

[0012] Preferably, the plurality of combustible gas holes are formed in the outer peripheral wall of the carbonizing screw conveyor so as to be arranged along the extending direction of the carbonizing screw conveyor, the combustion chamber inlet is formed at one end side of the combustion chamber extending along the extending direction of the carbonizing screw conveyor, the combustion chamber exhaust port is formed at the other end side of the combustion chamber, and a combustible gas passage is formed in the combustion chamber for flowing the combustible gas from the combustible gas hole near the other end of the combustion chamber to the one end side of the combustion chamber, thereby making it possible to improve the temperature and effective heating length of the combustion chamber.

[0013] Preferably, the combustion chamber is provided with upper and lower partition plates extending along the extension direction of the carbonizing screw conveyor and a vertical partition plate perpendicular to the upper and lower partition plates, the combustion chamber is a cylinder extending along the extension direction of the carbonizing screw conveyor, and is divided into a first combustion chamber cavity and a second combustion chamber cavity by an L-shaped partition plate portion consisting of the upper and lower partition plates and the vertical partition plate, the combustion chamber inlet is formed at one end of the combustion chamber, and the combustion chamber exhaust is provided at the other end of the combustion chamber. The air port is located at one end of the combustion chamber and is formed in the outer peripheral wall of the combustion chamber so as to communicate with the second combustion chamber cavity, the first combustion chamber cavity located above the upper and lower partition plates of the combustion chamber and the second combustion chamber cavity communicate vertically at the other end of the combustion chamber, and the first combustion chamber cavity and the combustion chamber air inlet port communicate with each other via a combustion chamber air inlet duct penetrating a part of the second combustion chamber cavity located between the first combustion chamber cavity and the combustion chamber air introduction cavity. As a result, the combustion chamber is divided into the first combustion chamber and the second combustion chamber, so that the length of the combustion passage as the effective heating length can be increased without increasing the longitudinal length of the combustion chamber. As a result, the combustion efficiency of the combustion chamber can be improved while miniaturizing the combustion chamber.

[0014] Preferably, the combustion chamber air inlet cavity is a tubular member provided on the outer circumferential side of the outer circumferential wall downstream of the carbonizing screw conveyor so that the combustion chamber is located between the supply screw conveyor and the combustion chamber air inlet cavity, and the air is preheated in the combustion chamber air inlet cavity before entering the combustion chamber.

[0015] Preferably, the carbonizing screw conveyor and the supply screw conveyor are arranged in the same straight line so as to be connected to each other.

[0016] Preferably, the supply screw conveyor and the carbonization screw conveyor are parallel to each other, and adjacent ends of the two conveyors are connected via a supply slope, and a rotating blade that rotates to supply biomass to the supply slope is installed at the end of the supply screw conveyor adjacent to the carbonization screw conveyor, and a flammable gas blocking wall facing the supply slope is installed at the communication point where the end of the supply screw conveyor and the end of the carbonization screw conveyor communicate with each other.

[0017] Preferably, the supply screw conveyor and the carbonization screw conveyor are in cross communication with each other.

[0018] Preferably, the pitch of the screws of the supply screw conveyor becomes gradually smaller toward the carbonization screw conveyor side. Effect of the Invention

[0019] According to the present invention, a biomass gasification carbonization production device that does not involve wood tar can be provided. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic diagram showing a structure according to an embodiment of the present invention. [Diagram 2] FIG. 13 is a schematic diagram showing a configuration in which a combustion chamber guide plate is added. [Diagram 3] FIG. 1 is a schematic diagram showing a structure with an improved flammable gas hole. [Figure 4] FIG. 2 is a schematic diagram showing an improved combustion chamber structure. [Diagram 5] FIG. 1 is a schematic diagram showing a first embodiment of the present invention. [Figure 6] FIG. 11 is a schematic diagram showing a second embodiment of the present invention. [Figure 7] FIG. 11 is a schematic diagram showing a third embodiment of the present invention. [Figure 8] FIG. 11 is a schematic cross-sectional view showing a third embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the drawings in the embodiments of the present invention, but it is clear that the described embodiments are only a part of the embodiments of the present invention, and are not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative labor belong to the scope of protection of the present invention.

[0022] A biomass gasification carbonization apparatus according to a first embodiment will be described with reference to FIG. 1 and FIG. 5. In the first embodiment, the biomass gasification carbonization apparatus without wood tar includes a supply system 1 for transporting biomass, as shown in FIG. 1. The supply system 1 includes a supply screw conveyor 11 and a hopper 12. The supply screw conveyor 11 adopts a variable pitch structure design, and the screw pitch of the supply screw conveyor 11 gradually becomes smaller from the upstream side to the downstream side (i.e., from the left to the right in FIG. 1). The biomass is piled up to fill the cavity of the supply screw conveyor 11, thereby preventing air from entering the carbonization system 2 described later from the supply screw conveyor 11. A hopper 12 is installed on the outer wall of the supply screw conveyor 11. The hopper 12 is a tubular structure having a truncated cone shape or a tubular structure having a square shape. A carbonization system 2 for carbonizing the biomass is provided on the adjacent side (downstream side) of the supply system 1. The carbonization system 2 includes a carbonization screw conveyor 21, a combustion chamber 22, a combustible gas hole 23, and a combustion chamber air introduction cavity 26. The carbonization screw conveyor 21 and the supply screw conveyor 11 are connected to each other via a duct. The carbonization screw conveyor 21 and the supply screw conveyor 11 are arranged in the same straight line so as to be connected to each other (see FIG. 5). The duct that communicates the supply screw conveyor 11 and the carbonization screw conveyor 21 is located in the lower half of the carbonization screw conveyor 21, thereby preventing the combustible gas generated during the carbonization process from flowing back into the supply screw conveyor 11. The outer wall (outer peripheral wall) of the carbonization screw conveyor 21 (specifically, the upstream side of the carbonization screw conveyor 21) is provided with a combustion chamber 22. The combustion chamber 22 is a cylinder that surrounds the outer periphery of the carbonization screw conveyor 21, and its temperature is controlled to be between 550°C and 650°C. Combustible gas holes 23 are formed in the outer wall (peripheral wall) of the carbonizing screw conveyor 21. The combustible gas holes 23 are formed as through holes, and the number of the combustible gas holes 23 is provided according to the longitudinal length of the outer wall of the carbonizing screw conveyor 21.A combustion chamber exhaust port 25 communicating with the inside of the combustion chamber 22 is formed on the other side of the combustion chamber 22 (i.e., the side close to the supply screw conveyor 11). A combustion chamber air inlet 24 communicating with the inside of the combustion chamber 22 is formed on one side of the combustion chamber 22 (i.e., the side away from the supply screw conveyor 11). A combustion chamber air introduction cavity 26 is attached to the outer wall on the downstream side of the carbonization screw conveyor 21. That is, the combustion chamber 22 and the combustion chamber air introduction cavity 26 are arranged on the outer periphery side of the carbonization screw conveyor 21 in order from the upstream side to the downstream side. The combustion chamber air introduction cavity 26 is a tubular cavity (tubular member) formed on the outside of the downstream side of the carbonization screw conveyor 21. A mechanism for adjusting the amount of air introduction, such as an air pump, a blower, or a valve, is provided on the outer wall of the combustion chamber air introduction cavity 26. When the temperature of the combustion chamber 22 is low, the supply amount of the combustion chamber air introduction cavity 26 can be increased to increase the proportion of combustible gas that burns, thereby improving the temperature of the combustion chamber 22. When the temperature is high, the supply amount of the combustion chamber air introduction cavity 26 can be decreased to decrease the proportion of combustible gas that burns, thereby lowering the temperature of the combustion chamber 22. Assuming good heat retention of the combustion chamber, the combustible gas from the biomass carbonization reaction is sufficient to maintain the heating of the carbonization system 2. The air is preheated in the heat exchange area 27 by the residual heat downstream of the carbonization screw conveyor 21 before entering the combustion chamber 22. A biomass charcoal outlet 28 is formed on the outer wall of the carbonization screw conveyor 21. A multi-stage cooling system 3 for cooling the biomass charcoal through the biomass charcoal outlet 28 is connected to the output port of the carbonization system 2 (specifically, the downstream side of the carbonization screw conveyor 21).

[0023] A biomass gasification carbonization apparatus according to Example 2 will be described with reference to FIG. 1, FIG. 2, and FIG. 6. In Example 2, based on Example 1, a biomass gasification carbonization apparatus without wood tar includes a supply system 1, as shown in FIG. 1 and FIG. 2. The supply system 1 includes a supply screw conveyor 11 and a hopper 12. The supply screw conveyor 11 adopts a variable pitch structure design, and the screw pitch of the supply screw conveyor 11 gradually becomes smaller from the upstream side to the downstream side (i.e., from the left to the right in FIG. 1). Then, the biomass can be piled up to fill the cavity of the supply screw conveyor 11, thereby preventing air from entering the carbonization system 2 from the supply screw conveyor 11. A hopper 12 is installed on the outer wall of the supply screw conveyor 11. The hopper 12 is a tubular structure having a truncated cone shape or a tubular structure having a square shape. The carbonization system 2 is installed on the adjacent side (downstream side) of the supply system 1. The carbonization system 2 includes a carbonization screw conveyor 21, a combustion chamber 22, a combustible gas hole 23, and a combustion chamber air introduction cavity 26. The supply screw conveyor 11 and the carbonization screw conveyor 21 are parallel to each other, and the adjacent ends of the two are connected via a supply slope 14 (see FIG. 6). A duct connecting the supply screw conveyor 11 and the carbonization screw conveyor 21 is located in the lower half of the carbonization screw conveyor 21. A combustion chamber 22 is provided on the outer wall of the carbonization screw conveyor 21 (specifically, on the upstream side of the carbonization screw conveyor 21). The combustion chamber 22 is a cylinder that surrounds the carbonization screw conveyor 21, and its temperature is controlled to be between 550°C and 650°C. A combustible gas hole 23 is formed on the outer wall of the carbonization screw conveyor 21, and the combustible gas hole 23 is composed of through holes, and the number of holes is formed according to the length of the outer wall in the longitudinal direction of the carbonization screw conveyor 21. A combustion chamber exhaust port 25 communicating with the inside of the combustion chamber 22 is formed on the other side of the combustion chamber 22 (i.e., the side close to the supply screw conveyor 11). A combustion chamber intake port 24 communicating with the inside of the combustion chamber 22 is formed on one side of the combustion chamber 22 (i.e., the side away from the supply screw conveyor 11).A spiral combustion chamber guide plate 22-1 is installed in the combustion chamber 22, centered on the axis of the combustion chamber 22 (see FIG. 2). The base end of the spiral combustion chamber guide plate 22-1 is connected to the inner wall (inner peripheral wall) of the combustion chamber 22, and the tip is connected to the outer wall (outer peripheral wall) of the carbonizing screw conveyor 21. This allows a spiral gas passage to be formed between the carbonizing screw conveyor 21 and the combustion chamber 22, so that the flow of high-temperature air between the combustion chamber air inlet 24 of the combustion chamber 22 and the combustion chamber exhaust port 25 can be made spiral. An air flow swirling around the carbonizing screw conveyor 21 is formed, and the carbonizing screw conveyor 21 can be heated more uniformly. A combustion chamber air introduction cavity 26 is attached to the outer wall on the downstream side of the carbonizing screw conveyor 21. That is, the combustion chamber 22 and the combustion chamber air introduction cavity 26 are arranged on the outer peripheral side of the carbonizing screw conveyor 21 in order from the upstream side to the downstream side. The combustion chamber air introduction cavity 26 is a tubular cavity (cylinder member) formed on the outer side of the downstream side of the carbonization screw conveyor 21. The outer wall of the combustion chamber air introduction cavity 26 is provided with a mechanism such as an air pump, blower, or valve for adjusting the amount of air introduction. When the temperature of the combustion chamber 22 is low, the supply amount of the combustion chamber air introduction cavity 26 is increased, so that the proportion of combustible gas that burns increases, and the temperature of the combustion chamber 22 can be improved. When the temperature is high, the supply amount of the combustion chamber air introduction cavity 26 is decreased, so that the proportion of combustible gas that burns decreases, and the temperature of the combustion chamber 22 can be reduced. Assuming that the combustion chamber is well kept warm, the combustible gas from the biomass carbonization reaction is sufficient to maintain the heating of the carbonization system 2. A rotating blade 13 is provided at the end (i.e., the downstream end) of the supply screw conveyor 11. The rotating blade 13 rotates and scrapes the biomass transported to the end out of the cross-sectional range of the supply screw conveyor 11 in a timely manner. Furthermore, an inclined supply slope 14 is installed between the supply screw conveyor 11 and the carbonization screw conveyor 21. The biomass passes through the supply slope 14 and enters the carbonization screw conveyor 21 in a short period of time.Between the supply screw conveyor 11 and the carbonization screw conveyor 21, a flammable gas blocking wall 15 facing the supply slope 14 is provided (see FIG. 6). The flammable gas blocking wall 15 can prevent the flammable gas in the carbonization screw conveyor 21 from entering the supply screw conveyor 11. The air is preheated in the heat exchange area 27 by the residual heat downstream of the carbonization screw conveyor 21 before entering the combustion chamber 22. A biomass charcoal outlet 28 is formed on the outer wall of the carbonization screw conveyor 21. A multi-stage cooling system 3 for cooling the biomass charcoal through the biomass charcoal outlet 28 is connected to the output port of the carbonization system 2 (specifically, the downstream side of the carbonization screw conveyor 21).

[0024] A biomass gasification carbonization apparatus according to Example 3 will be described with reference to Figures 1, 3, 4, 7 and 8. In Example 3, based on Example 1, a biomass gasification carbonization apparatus without wood tar includes a supply system 1, as shown in Figures 1, 3 and 4. The supply system 1 includes a supply screw conveyor 11 and a hopper 12. The supply screw conveyor 11 adopts a variable pitch structure design, and the pitch of the screw gradually decreases from the upstream side to the downstream side (i.e., from left to right in Figure 1). Biomass piles up to fill the cavity of the supply screw conveyor 11, thereby preventing air from entering the carbonization system 2 from the supply screw conveyor 11. A hopper 12 is installed on the outer wall of the supply screw conveyor 11. The hopper 12 is a tubular structure with a truncated cone shape. A carbonization system 2 for carbonizing biomass is installed adjacent to (downstream of) the supply system 1. The carbonization system 2 includes a carbonization screw conveyor 21, a combustion chamber 22, a combustible gas hole 23, and a combustion chamber air introduction cavity 26. The carbonization screw conveyor 21 and the supply screw conveyor 11 are connected to each other via a duct. The carbonization screw conveyor 21 and the supply screw conveyor 11 are installed so as to cross each other (see Figs. 7 and 8). A through hole that communicates the supply screw conveyor 11 and the carbonization screw conveyor 21 is located in the lower half of the carbonization screw conveyor 21. A combustion chamber 22 as a cylinder is provided on the outer wall (outer peripheral wall) of the carbonization screw conveyor 21. The combustion chamber 22 surrounds the upstream side of the carbonization screw conveyor 21, and the temperature of the combustion chamber 22 is controlled to be between 550°C and 650°C. A combustible gas hole 23 is formed on the outer wall (outer peripheral wall) of the carbonization screw conveyor 21. The combustible gas holes 23 are formed of through holes, and the number of holes is set according to the length of the outer peripheral wall in the longitudinal direction of the carbonizing screw conveyor 21. Inside the combustion chamber 22, there are provided upper and lower combustion chamber partition plates 22-2 extending along the extension direction of the carbonizing screw conveyor 21, and a vertical combustion chamber partition plate 22-3 perpendicular to the upper and lower combustion chamber partition plates 22-2.As shown in Fig. 4, the combustion chamber 22 is divided into a first combustion chamber cavity 22-4 and a second combustion chamber cavity 22-5 by an L-shaped partition plate portion consisting of a combustion chamber upper and lower partition plates 22-2 and a combustion chamber vertical partition plate 22-3. As shown in Fig. 4, the combustion chamber air inlet 24 is formed at one end of the combustion chamber 22 (the end portion close to the combustion chamber air introduction cavity 26). The combustion chamber exhaust port 25 is located on the one end side of the combustion chamber 22 and is formed in the outer peripheral wall of the combustion chamber 22 so as to communicate with the second combustion chamber cavity 22-5. The first combustion chamber cavity 22-4 and the second combustion chamber cavity 22-5 located above the upper and lower partition plates 22-2 of the combustion chamber are vertically connected at the other end side of the combustion chamber 22, and the first combustion chamber cavity 22-4 and the combustion chamber air inlet 24 are connected via the combustion chamber air inlet duct 24-1 that penetrates a part of the second combustion chamber cavity 22-5 located between the first combustion chamber cavity 22-4 and the combustion chamber air inlet cavity 26. As the direction of the airflow is shown by the arrow in FIG. 4, at this time, the temperature of the entire second combustion chamber cavity 22-5 becomes high, realizing a high-temperature combustion chamber as a whole, the effective heating length is longer, and the efficiency of gasified carbon production can be further improved. At this time, the length of the combustion chamber 22 can be shortened to 4 meters, and the length of the entire equipment can be shortened to 6 meters, and the entire equipment can be easily mounted on a car. A combustion chamber air introduction cavity 26 is attached to the outer wall of the downstream side of the carbonizing screw conveyor 21. That is, the combustion chamber 22 and the combustion chamber air introduction cavity 26 are arranged on the outer periphery of the carbonizing screw conveyor 21 in order from the upstream side to the downstream side. The combustion chamber air introduction cavity 26 is a tubular cavity (cylindrical member) formed on the outside of the downstream side of the carbonizing screw conveyor 21. The outer wall of the combustion chamber air introduction cavity 26 is provided with a mechanism for adjusting the amount of air introduced, such as an air pump, a blower, or a valve. When the temperature of the combustion chamber 22 is low, the supply amount of the combustion chamber air introduction cavity 26 is increased, so that the proportion of combustible gas that burns increases, and the temperature of the combustion chamber 22 can be improved. When the temperature is high, the supply amount of the combustion chamber air introduction cavity 26 is decreased, so that the proportion of combustible gas that burns decreases, and the temperature of the combustion chamber 22 can be reduced.Assuming good heat retention of the combustion chamber, the combustible gas from the biomass carbonization reaction is sufficient to maintain the heating of the carbonization system 2. The air is preheated in the heat exchange area 27 by the residual heat downstream of the carbonization screw conveyor 21 before entering the combustion chamber 22. A biomass charcoal outlet 28 is formed on the outer wall of the carbonization screw conveyor 21. A multi-stage cooling system 3 is connected to the output port of the carbonization system 2 for cooling the biomass charcoal through the biomass charcoal outlet 28.

[0025] The operation principle of the biomass gasification charcoal production apparatus according to the present invention will be described below. After the biomass is introduced into the supply screw conveyor 11 from the hopper 12, it is conveyed and introduced into the carbonization screw conveyor 21, so that the biomass enters the carbonization screw conveyor 21. Then, the biomass is vaporized at high temperature inside the carbonization screw conveyor 21 to produce charcoal and release combustible gas, which can be diffused into the combustion chamber 22 through the combustible gas hole 23 in the carbonization screw conveyor 21. Then, the combustible gas is burned inside the combustion chamber 22 to supply heat to the inside of the carbonization screw conveyor 21, and the biomass charcoal generated by the biomass inside the carbonization screw conveyor 21 is discharged through the biomass charcoal outlet 28 and enters the multi-stage cooling system 3 to be cooled. As a result, the combustible gas generated by the high-temperature vaporization of biomass inside the carbonization screw conveyor 21 is burned inside the combustion chamber 22, and this is used to supply heat to the carbonization reaction of the biomass inside the subsequent carbonization screw conveyor 21, not only maintaining the carbonization reaction itself during the entire process, but also allowing the air entering the combustion chamber 22 to be preheated in the heat exchange area 27 by the residual heat on the discharge side of the carbonization screw conveyor 21, thereby saving resources overall.

[0026] By designing the supply screw conveyor 11 to be smaller in diameter and lower in position than the carbonization screw conveyor 21, the screw pitch inside the supply screw conveyor 11 gradually becomes smaller, gradually compressing the biomass and increasing the filling rate of the biomass inside the supply screw conveyor 11, thereby achieving the effect of partially isolating the intrusion of air into the carbonization screw conveyor 21, to a certain extent replacing the sealing role of ordinary dischargers (e.g., star dischargers, etc.), and further simplifying the structure of the charcoal production equipment.

[0027] By providing the combustion chamber air introduction cavity 26 on the outer wall of the combustion chamber 22, when the combustible gas is burning and heated inside the combustion chamber, if the temperature is high, the combustible gas is burning relatively sufficiently, and at this time, the amount of air entering the combustion chamber air introduction cavity 26 can be reduced to reduce the amount of combustion of the combustible gas. If the temperature is low, the combustible gas is burning relatively insufficiently, and at this time, the amount of air entering the combustion chamber air introduction cavity 26 can be increased to increase the amount of combustion of the combustible gas. At the same time, the air entering the combustion chamber 22 can be preheated in the heat exchange area 27 by using the residual heat on the discharge side of the carbonization screw conveyor 21. After the temperature of the combustion chamber 22 rises, the rotation speed of the supply screw conveyor 11 and the carbonization screw conveyor 21 is increased first to increase the processing volume of the equipment. Even after the temperature drops, the amount of air is increased to increase the degree of combustion and raise the temperature of the combustion chamber 22. Finally, the processing capacity of the equipment is maximized, and the biomass carbonization efficiency of the equipment is increased.

[0028] By adding a combustion chamber guide plate 22-1 inside the combustion chamber 22, the burned gas can heat the carbonization screw conveyor 21 more uniformly. By adding a combustible gas passage 23-1 or a combustible gas hole extension tube 23-2 inside the combustion chamber 22, as shown in FIG. 3, the combustible gas is transported to the vicinity of the combustion chamber air inlet 24 in the combustion chamber 22 and burned, thereby improving the temperature of the entire combustion chamber 22 and better heating the carbonization screw conveyor 21. By adding a combustion chamber upper and lower partition plate 22-2 and a combustion chamber vertical partition plate 22-3 inside the combustion chamber 22, as shown in FIG. 4, the combustion chamber is divided into a first combustion chamber cavity 22-4 and a second combustion chamber cavity 22-5 by an L-shaped partition plate portion consisting of the combustion chamber upper and lower partition plate 22-2 and the combustion chamber vertical partition plate 22-3. As shown in FIG. 4, the combustion chamber air inlet 24 is formed at one end of the combustion chamber 22 (the end close to the combustion chamber air introduction cavity 26). The combustion chamber exhaust port 25 is located on one end side of the combustion chamber 22 and is formed on the outer peripheral wall of the combustion chamber 22 so as to communicate with the second combustion chamber cavity 22-5. The first combustion chamber cavity 22-4 located above the upper and lower partition plate 22-2 of the combustion chamber and the second combustion chamber cavity 22-5 communicate vertically at the other end side of the combustion chamber 22, and the first combustion chamber cavity 22-4 and the combustion chamber air intake port 24 communicate with each other via a combustion chamber air intake duct 24-1 that penetrates a part of the second combustion chamber cavity 22-5 located between the first combustion chamber cavity 22-4 and the combustion chamber air introduction cavity 26. The air flow direction is shown by an arrow in FIG. At this time, the temperature of the second combustion chamber cavity 22-5 becomes higher than the temperature of the first combustion chamber cavity 22-4, realizing a high-temperature combustion chamber as a whole, the effective heating length becomes longer, and the efficiency of gasified carbon production is further improved. At this time, the length of the combustion chamber 22 can be shortened to 4 meters, and the length of the entire equipment can be shortened to 6 meters, so that the entire device can be mounted on a vehicle.

[0029] Modifications and improvements such as additional structures in the combustion chamber 22, and design changes that do not change the essence of the flammable gas passing through the flammable gas hole 23 or the extension structure of the flammable gas hole 23 (flammable gas passage 23-1, flammable gas hole extension tube 23-2) and burning directly within the combustion chamber 22 are within the scope of protection of the present invention.

[0030] Biomass is vaporized at high temperature through carbonization system 2, and then biomass charcoal is generated and cooled inside multi-stage cooling system 3. During high-temperature processing, all insect eggs attached to the stems and leaves are removed through high temperatures. Biomass charcoal basically does not contain organic matter and can effectively prevent decay and bacterial growth. Farmers can compost it at the appropriate time and then return it to the field, increasing the fertility of the soil and realizing green and sustainable development.

[0031] The supply screw conveyor 11 and the carbonization screw conveyor 21 are parallel to each other, and when the adjacent ends of the two conveyors communicate with each other via the supply slope 14, a rotating blade 13 is provided at the end of the supply screw conveyor 11 adjacent to the carbonization screw conveyor 21. The rotating blade 13 scrapes out the biomass conveyed by rotating outside the cross-sectional range of the supply screw conveyor 11 in a timely manner. This supplies the biomass to the supply slope 14. A flammable gas barrier 15 is provided between the supply screw conveyor 11 and the carbonization screw conveyor 21. The flammable gas barrier 15 can prevent the flammable gas in the carbonization screw conveyor 21 from entering the supply screw conveyor 11.

[0032] The carbonization zone in the carbonization screw conveyor 21 is directly connected to the combustion chamber 22 through the combustible gas hole 23, so that the combustible gas in the biomass carbonization process can directly reach the combustion chamber 22 and be burned. The carbonization screw conveyor 21 is directly heated, which avoids the problem of structural complication caused by the separate design of the biomass transport structure and the carbonization structure in ordinary carbonization equipment, and achieves the beneficial effect of directly burning the combustible gas without wood tar, and can omit the complicated structural equipment such as rotating and sealing after being put into the carbonization chamber, collecting the combustible gas, collecting the wood tar, separating the wood tar from water, and transporting the combustible gas. The entire device can be transported on a vehicle, which is suitable for biomass resources scattered in rural areas, and can produce charcoal in fields.

[0033] Next, the effects of this embodiment will be described.

[0034] According to the biomass gasification charcoal production apparatus without wood tar of this embodiment, biomass is introduced into the inside of the supply screw conveyor 11 from the hopper 12, and then transmitted and introduced into the inside of the carbonization screw conveyor 21, whereby the biomass enters the inside of the carbonization screw conveyor 21, where the biomass is vaporized at high temperature and releases combustible gas, which diffuses into the inside of the combustion chamber 22 through the combustible gas hole 23 in the carbonization screw conveyor 21, and the combustible gas can be burned and heated inside the combustion chamber 22, supplying heat to the inside of the carbonization screw conveyor 21, and the biomass charcoal generated by the biomass inside the carbonization screw conveyor 21 is discharged through the biomass charcoal outlet 28 and cooled inside the multi-stage cooling system 3. This allows the combustible gas generated by the high-temperature vaporization of biomass inside the carbonization screw conveyor 21 to be re-burned inside the combustion chamber 22, thereby supplying heat to the subsequent carbonization reaction of biomass inside the carbonization screw conveyor 21, thereby maintaining its own carbonization reaction during the entire process and saving energy; the high-temperature gas after combustion can also supply heat to other equipment, resulting in good economic benefits.

[0035] In addition, according to the biomass gasification charcoal production device without wood tar, the carbonization zone in the carbonization screw conveyor 21 and the combustion chamber 22 installed on the outer surface are directly connected through the combustible gas hole 23, so that the combustible gas in the biomass carbonization process can directly reach the combustion chamber and be directly burned. The carbonization screw conveyor 21 is directly heated, and the problem of structural complication caused by the separate design of the biomass transport structure and the carbonization structure in ordinary carbonization equipment is avoided, and the combustible gas is directly burned, and the beneficial effect of not involving wood tar can be achieved. It is possible to omit the complex structural equipment such as rotating and sealing after being put into the carbonization chamber, collecting combustible gas, collecting wood tar, separating wood tar from water, and transporting combustible gas after being put into the carbonization chamber, and the whole device can be transported by vehicle, which is suitable for biomass resources scattered in rural areas, and charcoal can be produced in fields.

[0036] In addition, according to the biomass gasification carbonization production device that does not involve wood tar, by adding a combustion chamber guide plate 22-1 inside the combustion chamber 22, as shown in Figure 2, the airflow direction inside the combustion chamber can be changed, and the swirling airflow circling the carbonization screw conveyor 21 can be increased, thereby achieving the purpose of uniformly heating the carbonization screw conveyor 21. Since the temperature and effective heating length of the combustion chamber 22 can be improved, the lengths of the carbonization screw conveyor 21 and the combustion chamber 22 can be shortened, reducing costs and facilitating transportation to vehicles.

[0037] In addition, according to the biomass gasification carbonization production equipment that does not use wood tar, by connecting a combustible gas passage 23-1 or a combustible gas port extension tube 23-2 to the combustion chamber 22 side of the combustible gas port 23, as shown in Figure 3, the combustible gas is transported near the combustion chamber air inlet and enters the combustion chamber 22 for combustion, thereby improving the temperature and effective heating length of the combustion chamber and shortening the length of the carbonization screw conveyor 21 and the combustion chamber 22, thereby reducing costs and facilitating transportation to a vehicle.

[0038] In addition, according to the biomass gasification carbonization production device that does not involve wood tar, the combustion chamber 22 is provided with upper and lower combustion chamber partition plates 22-2 extending along the extension direction of the carbonization screw conveyor 21, and a combustion chamber vertical partition plate 22-3 perpendicular to the upper and lower combustion chamber partition plates 22-2. The combustion chamber 22 is a cylinder extending along the extension direction of the carbonization screw conveyor 21, and the upper and lower combustion chamber partition plates 22-2 and the combustion chamber vertical partition plate 22-3 are provided. The combustion chamber 22 is divided into a first combustion chamber cavity 22-4 and a second combustion chamber cavity 22-5 by an L-shaped partition plate portion consisting of a first partition plate 22-2 and a second partition plate 22-3. The combustion chamber air inlet 24 is formed at one end of the combustion chamber 22. The combustion chamber exhaust port 25 is located at one end side of the combustion chamber 22 and is formed in the outer peripheral wall of the combustion chamber 22 so as to communicate with the second combustion chamber cavity 22-5. The first combustion chamber cavity 22-4 and the combustion chamber air inlet 24 are connected vertically at the other end of the combustion chamber 22, and the first combustion chamber cavity 22-4 and the combustion chamber air inlet 24 are connected via a combustion chamber air inlet duct 24-1 that penetrates a part of the second combustion chamber cavity 22-5 located between the first combustion chamber cavity 22-4 and the combustion chamber air introduction cavity 26. This realizes that combustion occurs in the first combustion chamber cavity 22-4 and heating occurs in the second combustion chamber cavity 22-5, with the airflow direction shown by the arrow in Figure 4. At this time, the temperature of the second combustion chamber cavity 22-5 is higher than that of the first combustion chamber cavity 22-4, thereby realizing a high-temperature combustion chamber 22 as a whole, and the effective heating length of the entire combustion chamber 22 is lengthened, thereby improving the efficiency of gasified carbon production, and the length of the carbonization screw conveyor 21 and the combustion chamber 22 can be shortened to the maximum, thereby reducing costs and facilitating transportation to vehicles.

[0039] In addition, according to the biomass gasification carbonization production device that does not involve wood tar, by providing a combustion chamber air introduction cavity 26 on the outer wall of the combustion chamber 22, when the combustible gas is burning and heated inside the combustion chamber 22, if the temperature is high, the combustible gas is burning relatively sufficiently, and at this time, the amount of air entering the combustion chamber air introduction cavity 26 can be reduced to reduce the amount of combustion of the combustible gas, and if the temperature is low, the combustible gas is burning relatively insufficiently, and at this time, the amount of air entering the combustion chamber air introduction cavity 26 can be increased to increase the amount of combustion of the combustible gas. This enables flexible temperature control, and at the same time, the air before entering the combustion chamber 22 can be preheated in the heat exchange area 27 by using the residual heat on the discharge side of the carbonization screw conveyor 21. After the temperature of the combustion chamber 22 rises, the rotation speed of the supply screw conveyor 11 and the carbonization screw conveyor 21 is increased first, thereby increasing the throughput of the equipment. After the temperature drops, the amount of air continues to be increased to improve the degree of combustion and increase the temperature of the combustion chamber 22. Finally, when the temperature of the combustion chamber 22 can be controlled, the equipment throughput is maximized, and the biomass carbonization efficiency of the equipment is high.

[0040] In addition, according to the biomass gasification carbonization production equipment that does not use wood tar, the biomass is vaporized at high temperature through the carbonization system 2, and then biomass charcoal is generated and entered into the multi-stage cooling system 3 for cooling. During the high-temperature processing, all the insect eggs attached to the stems and leaves are removed through high temperatures, and the biomass charcoal basically does not contain organic matter and can effectively prevent decay and bacterial growth. Farmers can choose the appropriate time to compost it and then return it to the fields, thereby increasing the fertility of the soil and realizing green and sustainable development.

[0041] In addition, according to the biomass gasification charcoal production equipment that does not use wood tar, since there are no moving parts on the outside of the carbonization screw conveyor 21 or in the combustion chamber 22, it is easy to keep the temperature insulated and sealed as a whole, the heating temperature is high, the biomass is gasified to produce charcoal, the carbonization is completed in 2 to 4 minutes, and the charcoal enters the multi-stage cooling system, resulting in high carbonization efficiency.

[0042] In addition, according to the biomass gasification charcoal production equipment that does not use wood tar, by designing the supply screw conveyor 11 to be smaller in diameter and at a lower position than the carbonization screw conveyor 21, the screw pitch of the supply screw conveyor 11 gradually becomes smaller as it approaches the carbonization screw conveyor 21, gradually compressing the biomass and increasing the filling rate of the biomass inside the supply screw conveyor 11, thereby achieving the effect of partially isolating the intrusion of air into the carbonization screw conveyor 21, to a certain extent replacing the sealing role of a normal discharger (e.g., a star discharger, etc.), and further simplifying the structure of the charcoal production equipment.

[0043] The above shows and describes the basic principle, main features, and advantages of the present invention. The present invention is not limited by the above embodiments, and the above embodiments and the description in the specification merely illustrate the principles of the present invention. Various modifications and improvements of the present invention are possible without departing from the spirit and scope of the present invention. Those skilled in the art should understand that these modifications and improvements are within the scope of the invention claimed for protection. The scope of protection of the present invention is defined by the appended claims and their equivalents. [Explanation of symbols]

[0044] 1, feeding system, 2, carbonization system, 3, multi-stage cooling system, 11, feeding screw conveyor, 12, hopper, 13, rotating blade, 14, feeding slope, 15, flammable gas barrier, 21, carbonization screw conveyor, 22, combustion chamber, 22-1, combustion chamber guide plate, 22-2, combustion chamber upper and lower partition plate, 22-3, combustion chamber vertical partition plate, 22-4, first combustion chamber cavity, 22-5, second combustion chamber cavity, 23, flammable gas hole, 23-1, flammable gas passage, 23-2, flammable gas extension tube, 24, combustion chamber air inlet, 24-1, combustion chamber air inlet duct, 25, combustion chamber exhaust port, 26, combustion chamber air introduction cavity, 27, heat exchange area, 28, biomass charcoal outlet

Claims

1. A biomass gasification carbonization production device that does not involve wood tar, A supply system for transporting biomass; a carbonization system for carbonizing biomass; A multi-stage cooling system for cooling the biomass charcoal, the feed system is located at an input port of the carbonization system and includes a feed screw conveyor and a hopper connected to the feed screw conveyor; The carbonization system is a carbonization screw conveyor connected to the supply screw conveyor for gasifying the biomass to produce charcoal; a combustion chamber provided on the outer peripheral side of the outer peripheral wall of the carbonization screw conveyor for burning a flammable gas; a combustible gas hole formed in an outer peripheral wall of the carbonizing screw conveyor and communicating the carbonizing screw conveyor with the combustion chamber; The combustible gas generated when the biomass is vaporized in the carbonization screw conveyor to produce charcoal enters the combustion chamber through the combustible gas hole and is burned. The output port of the carbonization screw conveyor is connected to a multi-stage cooling system through a biomass charcoal outlet; A biomass gasification carbonization production apparatus.

2. A combustion chamber inlet and a combustion chamber exhaust port are formed in each of the combustion chambers, A combustion chamber air inlet cavity that controls the internal temperature of the combustion chamber is connected to the combustion chamber through the combustion chamber air inlet. A control valve is installed on the outer wall of the combustion chamber air introduction chamber to adjust the amount of air entering the combustion chamber air introduction cavity so as to control the internal temperature of the combustion chamber; The biomass gasification carbonization production apparatus according to claim 1 .

3. The combustion chamber is a cylinder extending along the extension direction of the carbonization screw conveyor, A spiral combustion chamber guide plate is installed inside the combustion chamber, the spiral guide plate being centered on the axis of the combustion chamber. The biomass gasification carbonization production apparatus according to claim 1 .

4. The plurality of flammable gas holes are formed in the outer peripheral wall of the carbonizing screw conveyor so as to be arranged along the extending direction of the carbonizing screw conveyor, The combustion chamber air inlet is formed on one end side of the combustion chamber extending along the extension direction of the carbonization screw conveyor, The combustion chamber exhaust port is formed on the other end side of the combustion chamber, A combustible gas passage is formed in the combustion chamber, which allows combustible gas from a combustible gas hole near the other end of the combustion chamber to flow to one end of the combustion chamber. The biomass gasification carbonization production apparatus according to claim 2 .

5. The combustion chamber is provided with upper and lower partition plates extending along the extension direction of the carbonization screw conveyor, and a vertical partition plate perpendicular to the upper and lower partition plates. The combustion chamber is a cylinder extending along the extension direction of the carbonization screw conveyor, and is divided into a first combustion chamber cavity and a second combustion chamber cavity by an L-shaped partition plate portion consisting of upper and lower combustion chamber partition plates and a combustion chamber vertical partition plate; The combustion chamber air inlet is formed at one end of the combustion chamber; The combustion chamber exhaust port is located on one end side of the combustion chamber and is formed in an outer peripheral wall of the combustion chamber so as to communicate with the second combustion chamber cavity; The first combustion chamber cavity and the second combustion chamber cavity located above the upper and lower partition plates of the combustion chamber are vertically connected to each other at the other end side of the combustion chamber, the first combustion chamber cavity and the combustion chamber air inlet port communicate with each other via a combustion chamber air inlet duct penetrating a portion of the second combustion chamber cavity located between the first combustion chamber cavity and the combustion chamber air introduction cavity; The biomass gasification carbonization production apparatus according to claim 2 .

6. The combustion chamber air introduction cavity is a cylindrical member provided on the outer circumferential side of the outer circumferential wall on the downstream side of the carbonizing screw conveyor so that the combustion chamber is located between the supply screw conveyor and the combustion chamber air introduction cavity; The air is preheated in the combustion chamber air inlet cavity before entering the combustion chamber; The biomass gasification carbonization production apparatus according to claim 2 .

7. The carbonization screw conveyor and the supply screw conveyor are arranged in the same straight line so as to be connected to each other. The biomass gasification carbonization production apparatus according to claim 1 .

8. The supply screw conveyor and the carbonization screw conveyor are parallel to each other, and adjacent ends of the two conveyors communicate with each other via a supply slope; At the end of the supply screw conveyor adjacent to the carbonization screw conveyor, a rotating blade is installed to rotate and supply biomass to the supply slope. A flammable gas barrier is installed at the communication point where the end of the supply screw conveyor and the end of the carbonization screw conveyor communicate with each other, facing the supply slope. The biomass gasification carbonization production apparatus according to claim 1 .

9. The supply screw conveyor and the carbonization screw conveyor communicate with each other so as to cross each other. The biomass gasification carbonization production apparatus according to claim 1 .

10. The screw pitch of the supply screw conveyor becomes gradually smaller as it approaches the carbonization screw conveyor side. The biomass gasification carbonization production apparatus according to any one of claims 7 to 9.

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