A biomass charcoal production system

Abstract

The present invention provides a biomass charcoal discharge system, comprising a gasifier, a grate rotatably arranged in the gasifier, a charcoal collecting device, and a charcoal processing device; the charcoal collecting device comprises a carrier for receiving charcoal and at least one charcoal discharge knife, the carrier is arranged at the bottom periphery of the grate and rotates synchronously with the grate, the gasifier is provided with a charcoal discharge port, the charcoal discharge knife is fixedly arranged in the gasifier and located at the charcoal discharge port; the charcoal processing device comprises a primary collection bin, a first pipeline for introducing saturated water vapor into the primary collection bin, a secondary collection bin, and a second pipeline for introducing saturated water vapor into the secondary collection bin, the top of the primary collection bin is connected to the charcoal discharge port, the bottom of the primary collection bin is connected to the secondary collection bin, and a sealing door is provided at the connection between the primary collection bin and the secondary collection bin. The present invention can discharge and collect the charcoal generated by pyrolysis in the gasifier in a timely and rapid manner, and simultaneously perform fire extinguishing and cooling treatment to obtain dry charcoal.

Description

Technical Field

[0001] The present invention relates to a biomass charcoal discharging system, and more particularly to a biomass gasification system capable of discharging dry charcoal. Background Art

[0002] Biomass carbonization technology is a type of biomass thermochemical conversion technology. It is a process in which chopped or formed biomass raw materials are heated in an oxygen-limited or anaerobic environment to cause internal decomposition of molecules, thereby forming biochar, bio-oil and non-condensable gas products.

[0003] Biochar has the characteristics of wide source of raw materials, low production cost, ecological safety and pollution-free. It has been widely used in carbon fixation and emission reduction, water purification, heavy metal adsorption and soil improvement. It can provide solutions to global hot issues such as climate change, environmental pollution and soil function degradation to a certain extent. my country's biomass resources are very rich, widely distributed and sustainably supplied, so biomass carbonization technology can be promoted on a large scale.

[0004] Biomass charcoal needs to be pyrolyzed in a biomass gasifier. The pyrolyzed biochar gathers at the bottom of the gasifier. On the one hand, it needs to be discharged in time, and on the other hand, it needs to be extinguished and cooled to avoid re-ignition of the biochar when it comes into contact with air after discharge. Summary of the invention

[0005] The present invention provides a biomass charcoal discharge system, which can timely and quickly discharge and collect the charcoal produced by pyrolysis in a gasifier, and simultaneously perform fire extinguishing and temperature reduction treatment to obtain dry charcoal.

[0006] The specific technical solution of the present invention is:

[0007] The biomass charcoal system is used for charcoal treatment after biomass pyrolysis, including a gasifier, a grate rotatably arranged in the gasifier, a charcoal collecting device, and a charcoal treatment device;

[0008] The charcoal collecting device comprises a carrier for receiving charcoal and at least one charcoal discharge knife, the carrier is arranged at the outer periphery of the bottom of the grate and rotates synchronously with the grate, the gasifier is provided with a charcoal discharge port, and the charcoal discharge knife is fixedly arranged in the gasifier and located at the charcoal discharge port;

[0009] The carbon treatment device includes a primary collecting bin, a first pipeline for introducing saturated water vapor into the primary collecting bin, a secondary collecting bin, and a second pipeline for introducing saturated water vapor into the secondary collecting bin. The top of the primary collecting bin is connected to the carbon outlet, and the bottom of the primary collecting bin is connected to the secondary collecting bin. A sealing door is provided at the connection between the primary collecting bin and the secondary collecting bin.

[0010] In the above technical solution of the present invention, a fixed charcoal discharge knife and a rotating grate (carrier) structure are used to discharge charcoal. When the charcoal accumulated on the grate encounters the charcoal discharge knife, it will be pushed out in a directional manner under the pushing action of the charcoal discharge knife, and then quickly discharged from the charcoal outlet to the primary collection bin.

[0011] Furthermore, the charcoal is subjected to the first stage of fire extinguishing and cooling in the primary collecting bin, and saturated water vapor with a certain pressure is introduced into the primary collecting bin through the first pipeline, so as to directly extinguish and cool the charcoal falling into the primary collecting bin from the charcoal outlet; the charcoal is subjected to the second stage of fire extinguishing and cooling (mainly cooling treatment) in the secondary collecting bin, and saturated water vapor with a certain pressure is introduced into the secondary collecting bin through the second pipeline, so as to thoroughly cool the charcoal discharged from the sealed door to the secondary collecting bin, so as to achieve the final direct external discharge effect.

[0012] Specifically, the introduction of saturated water vapor into the primary collecting bin is continuous, nearly non-stop or with very short intervals, wherein the saturated water vapor directly acts on the charcoal in the primary collecting bin, for example, in the form of a jet directly acting on the charcoal that has just fallen into the primary collecting bin, and then a small amount of saturated water vapor can flow upward into the gasifier from the charcoal outlet, and this part of the saturated water vapor flowing into the gasifier can directly participate in the pyrolysis reaction process, indirectly providing the gasifier with the required water vapor.

[0013] More specifically, once the secondary collection bin is fully filled with saturated water vapor and maintains the set pressure, the introduction process can be stopped. The saturated water vapor provides a stable oxygen-free, fire-extinguishing and temperature-reducing environment for the charcoal in the secondary collection bin, so as to cool the charcoal in the secondary collection bin to a level that can be directly discharged into the external environment.

[0014] According to another specific embodiment of the present invention, the saturated water vapor pressure in the first pipeline is not less than the saturated water vapor pressure in the second pipeline. The purpose of such a setting is that when the sealed door is opened, the pressure in the primary collecting bin is greater than the pressure in the secondary collecting bin, preventing the gas in the secondary collecting bin from diffusing into the primary collecting bin, thereby accelerating the discharge process of the charcoal in the primary collecting bin, isolating the possibility of oxygen in the secondary collecting bin diffusing into the primary collecting bin during the opening process of the sealed door, and ensuring that no air (oxygen) enters the primary collecting bin during the process of discharging the charcoal in the primary collecting bin.

[0015] According to another specific embodiment of the present invention, the pressure value of the saturated water vapor introduced into the first pipeline is 7 kPa to 10 kPa, and the pressure value of the saturated water vapor introduced into the second pipeline is 5 kPa to 8 kPa.

[0016] According to another specific embodiment of the present invention, the charcoal discharge knife has a guide portion inclined along the negative direction biased towards the grate rotation direction, where the negative direction of the rotation direction refers to the opposite direction of the tangential component of the grate rotation direction. More specifically, the guide portion is inclined so that the charcoal in a rotating state (accumulated on the carrier) will flow toward the charcoal outlet after contacting the guide portion until it falls into the primary collection bin.

[0017] Preferably, in the radial direction of the grate, the guide portion is arranged to cover the charcoal outlet, so as to achieve the effect of quickly discharging the charcoal.

[0018] More preferably, the carbon discharge knife further comprises a guide portion extending from the guide portion to the carbon discharge port, so as to facilitate the complete discharge of carbon and avoid accumulation.

[0019] According to another specific embodiment of the present invention, the charcoal collection device further includes at least one charcoal removal scraper, the gasifier has a bottom wall and a side wall, in the horizontal direction, there is a first gap between the carrier and the side wall, in the vertical direction, there is a second gap between the carrier and the bottom wall, the charcoal removal scraper is fixed on the carrier and is located in the second gap, and a charcoal removal port connected to the primary collection bin is provided on the bottom wall, and the charcoal removal scraper acts on the charcoal that falls from the first gap into the second gap, and discharges this part of the charcoal from the charcoal removal port.

[0020] In the above technical scheme of the present invention, the grate is arranged in the gasifier in a rotatable manner, and the relative rotation between the grate and the gasifier can form the effect of pushing out the charcoal. However, since the grate and the gasifier need to rotate relative to each other, in order to ensure the stable performance of the rotation, there must be a gap between the two. The charcoal can pass through the gap and form an accumulation phenomenon, causing blockage, and even shutdown in severe cases. Based on this phenomenon, the present scheme adopts a charcoal discharge knife and a charcoal discharge scraper arranged up and down to discharge the charcoal on the carrier and the charcoal on the bottom wall respectively. This structural arrangement can, on the one hand, quickly and concentratedly discharge the charcoal produced by pyrolysis, and on the other hand, it can avoid the phenomenon of charcoal re-burning into slag caused by long-term accumulation of raw charcoal, thereby ensuring the quality of the charcoal produced.

[0021] Furthermore, the relative rotation between the charcoal discharger and the carrier can discharge the main part of the charcoal into the primary collecting bin through the charcoal discharge port. The carrier is arranged at the bottom periphery of the grate and can directly receive the charcoal formed by pyrolysis. The carrier and the grate rotate synchronously, thereby sending the charcoal fallen on the carrier to the charcoal discharger for discharge. In this process, some small particles of charcoal fall onto the bottom wall from the first gap between the carrier and the side wall.

[0022] Specifically, the bottom wall is fixed and it is necessary to discharge this part of the charcoal. In this scheme, a charcoal discharge scraper is set on the carrier (specifically the lower side of the carrier), and the charcoal discharge scraper is located in the second gap. With the synchronous rotation of the second charcoal discharge knife and the carrier, the charcoal on the bottom wall can be moved, and then the charcoal on the bottom wall can be discharged from the charcoal discharge port (located on the bottom wall) into the primary collection bin.

[0023] According to another specific embodiment of the present invention, the primary collecting bin is provided with an L-shaped notch portion, which includes a side portion connected to the carbon outlet and a bottom portion connected to the carbon outlet, the side portion is sealedly connected to the side wall, and the bottom portion is sealedly connected to the bottom wall.

[0024] According to another specific embodiment of the present invention, a retaining ring structure is provided on the bottom wall, and an annular groove with a U-shaped longitudinal section is formed between part of the side wall, part of the bottom wall and the retaining ring structure, and the carbon removal scraper is located in the annular groove.

[0025] According to another specific embodiment of the present invention, the number of the carbon removal scrapers and the number of the carbon removal knives are both more than three, wherein the number of the carbon removal scrapers and the number of the carbon removal knives are the same or different.

[0026] According to another specific embodiment of the present invention, the sealing door includes a top cover, a horizontal axis, a top arm, and a power component. The top cover is arranged at the connection between the primary collecting bin and the secondary collecting bin through the horizontal axis. The top arm acts on the top cover to keep the top cover closing the outlet of the primary collecting bin. The power component is used to change the position of the top arm to open the outlet of the primary collecting bin.

[0027] According to another specific embodiment of the present invention, the biomass charcoal production system also includes a charcoal conveying device, which includes a Jiaolong cylinder and a third pipeline for introducing cooling liquid / gas into the Jiaolong cylinder, wherein the Jiaolong cylinder is connected to a secondary collecting bin, and a gate is provided at the outlet of the secondary collecting bin.

[0028] The coolant / gas in the third pipeline in this scheme is used to directly act on the charcoal in the Jiaolong cylinder, especially some charcoal blocks with higher hardness, which are discharged after fire extinguishing and cooling in the primary collection bin and the secondary collection bin. During the transportation of the Jiaolong cylinder, larger charcoal blocks are broken and remaining sparks inside are exposed. At this time, the final fire extinguishing and cooling treatment is carried out through the third pipeline.

[0029] According to another specific embodiment of the present invention, a position-adjustable nozzle is provided at the execution end of the third pipeline.

[0030] The present invention has the following beneficial effects:

[0031] The biomass gasification system of the present invention adopts a staged fire extinguishing and cooling treatment method to treat the charcoal in the primary collection bin and the secondary collection bin respectively to complete the smooth discharge of the charcoal; among them, the fire extinguishing and cooling process is carried out in the form of saturated water vapor, which has the advantages of high fire extinguishing efficiency and the ability to form charcoal with suitable humidity for easy transportation.

[0032] In addition, the primary collection bin and the secondary collection bin of the present invention can form an isolated environment from each other, thus preventing air (oxygen) from flowing from the secondary collection bin into the primary collection bin, achieving an anaerobic transfer process of the charcoal, and preventing the re-ignition of the charcoal.

[0033] In addition, the present invention arranges a carbon discharge knife on the upper layer of the carrier and a carbon discharge scraper on the lower layer of the carrier, which can completely discharge the carbon produced by the gasifier, prevent carbon accumulation in the gasifier, avoid re-ignition caused by carbon accumulation, and ensure the quality of the carbon.

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the framework of the biomass charcoal production system of the present invention;

[0036] Figure 2 It is a structural schematic diagram of the biomass charcoal production system of the present invention;

[0037] Figure 3 is a cross-sectional view of the biomass charcoal-extracting system of the present invention;

[0038] Figure 4 yes Figure 3 Schematic diagram of section A-A;

[0039] Figure 5 is a schematic diagram showing the bottom of a gasifier according to the present invention;

[0040] Figure 6 is a schematic diagram showing a carrier and a primary collection bin of the present invention;

[0041] Figure 7 It is a schematic diagram of the rotating structure of the grate of the present invention;

[0042] Figure 8 is a schematic diagram of a secondary collection bin of the present invention;

[0043] Fig. 9 It is a schematic diagram of the coordination of the primary collection bin and the secondary collection bin of the present invention;

[0044] Fig.10 Schematic diagram of the charcoal conveying device of the present invention. DETAILED DESCRIPTION

[0045] This example provides a biomass charcoal system for char treatment after biomass pyrolysis. Figure 1 As shown in FIG. 10 , the gasifier 10 includes a gasifier 10, a grate 20, a charcoal collecting device 30, a charcoal processing device 40, and a saturated water vapor pipeline.

[0046] The charcoal collecting device 30 is used to collect the charcoal produced by pyrolysis in the gasifier 10 and discharge it after collection. The charcoal treatment device 40 is used to provide a place for extinguishing and cooling the charcoal, including a primary collecting bin 41 and a secondary collecting bin 42 arranged in sequence to obtain charcoal that can be directly transported. The saturated water vapor pipeline is used to provide saturated water vapor of the required pressure value, including a first pipeline 51 and a second pipeline 52, so as to extinguish and cool the charcoal in the primary collecting bin 41 and the secondary collecting bin 42, respectively.

[0047] The gasifier 10 of this example adopts Figure 2 , Figure 3 The vertical gasifier shown in the figure is provided with a grate 20 which is rotatably arranged at the bottom of the gasifier 10 to provide the combustion gas required for pyrolysis. Figure 7 As shown, the grate 20 is rotated by being driven by the external ratchet structure 21. Accordingly, a water seal structure can be provided at the rotational cooperation position between the grate's rotary pipe 22 and the gasifier 10 to achieve sealing.

[0048] The gasifier 10 is cylindrical in shape as a whole and has a relatively large volume. The gasifier 10 can be fixed by, for example, a support beam, and a plurality of hole structures 11 are provided on the gasifier 10 for observation, maintenance and other operations. The structure of the gasifier 10 here can be a gasifier 10 structure capable of pyrolysis, and other conventional functions will not be repeated here.

[0049] The charcoal collecting device 30 in this example includes a carrier 31 for receiving charcoal, four charcoal discharge knives 32, and eight charcoal discharge scrapers 33. The carrier 31 is arranged on the bottom periphery of the grate 20 and rotates synchronously with the grate 20. The gasifier 10 has a bottom wall 12 and a side wall 13. Four charcoal discharge ports 14 are arranged on the side wall 13. The four charcoal discharge knives 32 are respectively fixed on the side wall 13 and located at different charcoal discharge ports 14. The eight charcoal discharge scrapers 33 are fixed on the bottom of the carrier 31 in a uniformly distributed manner. Four charcoal discharge ports 15 are arranged on the bottom wall 12.

[0050] In order to quickly discharge the charcoal accumulated on the carrier 31 into the primary collecting bin 41, Figure 4 As shown, the charcoal discharge knife 32 has a guide portion 321 inclined in the negative direction biased towards the rotation direction of the grate 20. The inclined guide portion 321 allows the charcoal in a rotating state (accumulated on the carrier 31) to flow toward the charcoal discharge port 14 after contacting the guide portion 321 until it falls into the primary collection bin 41.

[0051] The charcoal discharge knife 32 preferably further includes a guide portion 322 extending from the guide portion 321 to the charcoal discharge port 14 , so that the charcoal can be directly discharged into the primary collecting bin 41 , thereby completely avoiding the accumulation phenomenon.

[0052] like Figure 3 As shown, based on the design of relative rotation between the larger grate 20 and the gasifier 10 of the overall structure, a first gap c1 is formed between the carrier 31 and the side wall 13 in the horizontal direction. The charcoal with smaller particle size produced by pyrolysis can be accumulated in the first gap c1 and needs to be discharged in time, otherwise it is easy to cause unstable rotation of the grate 20, uncontrollable re-ignition of the charcoal, etc. Therefore, the carrier 31 in this example is set higher than the bottom wall 12, and a second gap c2 is formed between the carrier 31 and the bottom wall 12, and the charcoal in the second gap c2 is discharged by the rotation of eight charcoal discharge scrapers 33.

[0053] See also Figure 5 , Figure 6 The carbon discharging scraper 33 is fixed on the carrier 31 and is located in the second gap c2. The carbon discharging scraper 33 acts on the carbon that falls from the first gap c1 to the second gap c2, and discharges the carbon from the carbon discharging port 15 into the primary collecting bin 41.

[0054] Among them, a retaining ring structure 16 is provided on the bottom wall 12, and an annular groove 17 with a U-shaped longitudinal cross-section is formed between part of the side wall 13, part of the bottom wall 12 and the retaining ring structure 16. The carbon discharge scraper 33 is located in the annular groove 17 to prevent the carbon on the bottom wall 12 from being too dispersed and facilitate discharge.

[0055] Furthermore, part of the bottom wall 12 forming the annular groove 17 can be tilted outward to form an inclined seat, and the carbon removal scraper 33 has a bottom edge matching the inclined seat, which can effectively prevent the carbon falling into the second gap c2 from gathering toward the retaining ring structure 16.

[0056] In order to collect the charcoal discharged from the charcoal outlet 14 and the charcoal outlet 15 at the same time, the primary collecting bin 41 in this example is provided with an L-shaped notch portion, the notch portion includes a side portion 411 and a bottom portion 412, the side portion 411 is sealed to the side wall 13, and the bottom portion 412 is sealed to the bottom wall 12. Figure 6 As shown, the char discharged from the char outlet 14 falls into the primary collection bin 41 through the side portion 411 , and the char discharged from the char outlet 15 falls into the primary collection bin 41 through the bottom portion 412 , and is collected and extinguished in a centralized manner.

[0057] See again Figure 1In this example, the charcoal is extinguished and cooled in the primary collecting bin 41 and the secondary collecting bin 42. Saturated water vapor of 7 kPa to 10 kPa is introduced into the primary collecting bin 41 through the first pipeline 51 to quickly extinguish the charcoal. Saturated water vapor of 5 kPa to 8 kPa is introduced into the secondary collecting bin 42 through the second pipeline 52 to quickly extinguish the charcoal again.

[0058] Among them, the saturated water vapor pressure in the first pipeline 51 is preferably not less than the saturated water vapor pressure in the second pipeline 52, that is, the saturated water vapor pressure entering the primary collecting bin 41 is not less than the saturated water vapor pressure entering the secondary collecting bin 42. For example, the saturated water vapor pressure entering the primary collecting bin 41 is 8 kPa, and the saturated water vapor pressure entering the secondary collecting bin 42 is 6 kPa. The advantage of such a setting is that when the sealing door 43 at the outlet of the primary collecting bin 41 is opened, the pressure in the primary collecting bin 41 is greater than the pressure in the secondary collecting bin 42, preventing the gas (oxygen) in the secondary collecting bin 42 from diffusing into the primary collecting bin 41, which can accelerate the discharge process of the charcoal in the primary collecting bin 41 and completely isolate the oxygen in the secondary collecting bin 42 from diffusing into the primary collecting bin 41 during the opening process of the sealing door.

[0059] The two-stage structure of the primary collecting chamber 41 and the secondary collecting chamber 42 in this example can completely avoid the interference of oxygen, so as to facilitate the extinguishing and cooling of the charcoal.

[0060] See also Figure 8 , Fig. 9 The sealing door 43 includes a top cover 431, a horizontal shaft 432, a top arm 433 and a power component. The top cover 431 is arranged in the secondary collecting bin 42 through the horizontal shaft 432. The top arm 433 acts on the top cover 431 to keep the top cover 431 closing the outlet of the primary collecting bin 41. The power component is used to change the position of the top arm 433 to open the outlet of the primary collecting bin 41.

[0061] Among them, the power component adopts a pneumatic structure, including a cylinder 434, a mounting bracket 435, a rocker 436, and a rotating shaft 437. The middle part of the cylinder body of the cylinder 434 is hinged on the mounting bracket 435, the rotating shaft 437 is arranged on the mounting bracket 435 and is parallel to the horizontal axis 432, one end of the top arm 433 is fixed on the rotating shaft 437, and the other end of the top arm 433 is abutted against the top cover 431, one end of the rocker 436 is hinged on the piston rod of the cylinder 434, and the other end of the rocker 436 is fixed on the rotating shaft 437.

[0062] A gate 44 is set at the outlet of the secondary collecting bin 42. The gate 44 is a horizontal sliding door, including a gate plate 441, a slide rail seat 442, and a push-pull cylinder 434. The slide rail seat 442 is set at the outlet of the secondary collecting bin 42, and the gate plate 441 is slidably set on the slide rail seat 442. The push-pull cylinder 443 drives the gate plate 441 to slide to open or close the outlet of the secondary collecting bin 42.

[0063] In this example, a feeding part 60 and a charcoal conveying device part 70 are also provided respectively;

[0064] See also Figure 2 The feeding part 60 includes a feeding auger 61, a feeding hopper elevator 62, a feeding pipe 63, and a feeding bin 64. The biomass raw materials are fed to the feeding auger 61, and then the biomass raw materials are continuously supplied to the gasifier 10 through the feeding hopper elevator 62-feeding pipe 63-feeding bin 64-gasifier 10 to carry out the pyrolysis process.

[0065] The charcoal conveying device part 71 is used to receive the charcoal discharged from the gate 44 for centralized processing of the charcoal. The charcoal conveying device part 70 includes a charcoal conveying auger 71, a charcoal bucket elevator 72, and a dry charcoal bin 73. The charcoal delivered from the secondary collection bin 42 is collected centrally through the charcoal conveying auger 71, the charcoal bucket elevator 72, and the dry charcoal bin 73.

[0066] Among them, the charcoal transport dragon 71 in this example has a dragon cylinder 711, and the saturated water vapor pipeline also includes a third pipeline 53. The third pipeline 53 is used to introduce cooling liquid / gas into the dragon cylinder 711. The cooling liquid / gas acts on the charcoal in the dragon cylinder 711 to perform final fire extinguishing and cooling treatment. When unexpected sporadic sparks occur, a spray fire extinguishing operation can be performed through a nozzle arranged at the end of the third pipeline 53.

[0067] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art can make some improvements without departing from the scope of the present invention, that is, all equivalent improvements made according to the present invention should be covered by the scope of the present invention.

Claims

1. Biomass charcoal system, used for charcoal treatment after biomass pyrolysis, characterized by: include: Gasifier; A grate, rotatably disposed in the gasification furnace; Carbon collection device; Carbon treatment equipment; The charcoal collecting device comprises a carrier for receiving charcoal and at least one charcoal discharge knife, wherein the carrier is arranged at the outer periphery of the bottom of the grate and rotates synchronously with the grate, the gasifier is provided with a charcoal discharge port, and the charcoal discharge knife is fixedly arranged in the gasifier and located at the charcoal discharge port; The carbon treatment device comprises a primary collection bin, a first pipeline for introducing saturated water vapor into the primary collection bin, a secondary collection bin, and a second pipeline for introducing saturated water vapor into the secondary collection bin. The top of the primary collection bin is connected to the carbon outlet, the bottom of the primary collection bin is connected to the secondary collection bin, and a sealing door is provided at the connection between the primary collection bin and the secondary collection bin. The char collection device further comprises at least one char removal scraper, the gasifier has a bottom wall and a side wall, a first gap is formed between the carrier and the side wall in the horizontal direction, and a second gap is formed between the carrier and the bottom wall in the vertical direction, the char removal scraper is fixed on the carrier and is located in the second gap, a char removal port connected to the primary collection bin is provided on the bottom wall, the char removal scraper acts on the char that falls from the first gap into the second gap, and discharges the char from the char removal port; The bottom wall is provided with a retaining ring structure, and an annular groove with a U-shaped longitudinal section is formed between part of the side wall, part of the bottom wall and the retaining ring structure, and the carbon removal scraper is located in the annular groove.

2. The biomass charcoal production system according to claim 1, characterized in that: The saturated water vapor pressure in the first pipeline is not less than the saturated water vapor pressure in the second pipeline.

3. The biomass charcoal production system according to claim 2, characterized in that: The pressure value of the saturated water vapor introduced into the first pipeline is 7kPa~10kPa, and the pressure value of the saturated water vapor introduced into the second pipeline is 5kPa~8kPa.

4. The biomass charcoal production system according to claim 1, characterized in that: The coal discharge knife has a guide portion inclined in a negative direction biased toward a rotation direction of the grate.

5. The biomass charcoal production system according to claim 1, characterized in that: The number of the carbon discharging scrapers and the number of the carbon discharging knives are both more than three, wherein the number of the carbon discharging scrapers and the number of the carbon discharging knives are the same or different.

6. The biomass charcoal production system according to claim 1, characterized in that: The sealing door includes a top cover, a horizontal axis, a top arm, and a power component. The top cover is arranged at the connection between the primary collecting bin and the secondary collecting bin through the horizontal axis. The top arm acts on the top cover to keep the top cover closing the outlet of the primary collecting bin. The power component is used to change the position of the top arm to open the outlet of the primary collecting bin.

7. The biomass charcoal production system according to claim 1, characterized in that: The biomass charcoal extraction system also includes a charcoal conveying device, which includes a Jiaolong cylinder and a third pipeline for introducing cooling liquid / gas into the Jiaolong cylinder, wherein the Jiaolong cylinder is connected to the secondary collection bin, and a gate is provided at the outlet of the secondary collection bin.

8. The biomass charcoal production system according to claim 7, characterized in that: The execution end of the third pipeline is provided with a nozzle with adjustable position.

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