A mobile straw high-temperature baking and micro-carbonization in-situ return device

Abstract

This invention relates to the field of straw treatment technology, specifically a mobile high-temperature roasting and micro-carbonization in-situ straw return-to-field device. The device includes a furnace chamber, inside which is a drum body. A feeding and ignition mechanism is mounted on the surface of the biomass combustion furnace body. A high-efficiency combustion mechanism is installed inside the furnace chamber, and a waste gas treatment mechanism is installed inside the exhaust gas purification box. This invention, by integrating high-temperature roasting and micro-carbonization technology, solves the problems of high processing costs, low in-situ field treatment efficiency, insufficient heat utilization, and substandard exhaust emissions in existing technologies, achieving efficient, clean, and high-value in-situ straw return-to-field utilization.

Description

Technical Field

[0001] This invention relates to the field of straw treatment technology, specifically a mobile straw high-temperature baking and micro-carbonization in-situ return-to-field device. Background Technology

[0002] Straw is rich in nitrogen, phosphorus, potassium, and various trace elements, making it an important agricultural resource. Returning straw to the field is an effective way to increase soil organic matter, improve soil structure, and enhance arable land quality. However, directly returning untreated straw to the field can pose potential pest and disease risks to subsequent crops due to the large number of insect eggs and pathogens it carries, potentially affecting crop yield.

[0003] Currently, while mainstream off-field straw treatment technologies (such as centralized carbonization) can achieve harmless straw disposal, their processes involve multiple stages, including straw collection, baling, transportation, storage, and industrial processing. This results in high collection, storage, and transportation costs, poor economic viability, and difficulty in widespread implementation. Therefore, agricultural production urgently needs a technology that can directly treat straw in situ at the field level to bridge the "last mile" of straw return to the field.

[0004] However, direct straw carbonization in the field faces a major technical bottleneck: low carbonization efficiency and slow processing speed. Traditional carbonization technologies typically require long reaction times, which cannot match the high-efficiency requirements of continuous agricultural machinery operation, resulting in low processing capacity and severely restricting the application and development of direct straw carbonization and return to the field. Therefore, how to significantly improve processing speed while ensuring processing effectiveness has become a core problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a mobile straw high-temperature baking and micro-carbonization in-situ return device to the field, so as to solve the problems mentioned in the background art that the in-situ return device requires more heat for combustion, is not efficient enough, and usually does not have the function of waste gas treatment.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a mobile straw high-temperature baking and micro-carbonization in-situ return-to-field device, comprising a furnace chamber, an electrical control system installed on the surface of the furnace chamber, a tail gas purification box installed on the surface of the furnace chamber near the electrical control system, a drum body installed inside the furnace chamber, the drum body having a certain inclination, higher at the front and lower at the back, multiple sets of lifting plates with inclined angles arrayed on the inner wall of the drum body, a front end head of the drum installed on one side of the inner wall of the furnace chamber, a rear end head of the drum installed on the inner wall of the furnace chamber away from the front end head, a biomass combustion furnace body installed on the inner wall of the furnace chamber, a biomass combustion furnace inlet for discharging material opened on the surface of the rear end head of the drum, a feeding and ignition mechanism provided on the surface of the biomass combustion furnace body, a high-efficiency combustion mechanism provided inside the furnace chamber, and a waste gas treatment mechanism provided inside the tail gas purification box.

[0007] Preferably, an exhaust pipe for exhaust is installed on the surface of the top of the exhaust gas purification box, an insulation layer for heat preservation is installed on the inner wall of the furnace of the device, a traction frame is installed on the surface of the electrical control system and the exhaust gas purification box, the traction frame is connected to the collecting crusher by studs, a feed hopper is fixedly installed on the upper part of the front end of the drum, the top of the feed hopper extends to the top of the furnace of the device, the bottom end of the feed hopper is connected to the front end of the drum for feeding material into the drum body, the front end of the drum itself does not rotate, and there is a dynamic seal between it and the drum body.

[0008] Preferably, the rear end of the roller itself does not rotate and is dynamically sealed to the roller body. A drive motor is installed on the inner wall of the furnace chamber of the device. A small gear plate is installed on the output end of the drive motor through a coupling and a rotating shaft. A large gear plate is fitted on the surface of the roller body. The large gear plate and the small gear plate mesh with each other to drive the roller body to rotate inside the furnace chamber of the device. A front roller support and a rear roller support are respectively installed on the inner wall of the furnace chamber of the device. The front roller support and the rear roller support are responsible for bearing the weight of the roller body and restricting the roller body to prevent the roller body from falling off during vehicle transportation.

[0009] Preferably, the inner wall of the biomass combustion furnace body is equipped with a grate, and the surface of the biomass combustion furnace body is provided with an ash outlet for direct ash removal. Two sets of baffles are symmetrically arranged on both sides of the furnace chamber of the device. The baffles are used to block the ash outlet. A heating pipe is installed on the surface of the biomass combustion furnace body. One end of the heating pipe passes through the rear end of the drum and extends into the interior of the drum body to transport the heat inside the biomass combustion furnace body to the interior of the drum body.

[0010] Preferably, a first fan for drawing exhaust gas from the furnace is installed inside the drum body. A connecting pipe is installed at the input end of the first fan, and one end of the connecting pipe extends into the exhaust gas purification box. A carbon discharge pipe for discharging carbon is installed inside the furnace. The carbon discharge pipe is connected to the lower end of the rear end of the drum. A carbon storage box is installed on the surface at the bottom of the furnace. The carbon storage box contains cooling water. The straw charcoal discharged from the carbon discharge pipe enters the carbon storage box and is cooled by the cooling water inside the carbon storage box. A straw charcoal spreading system is installed on the surface of the furnace. A carbon discharge auger is installed inside the carbon storage box.

[0011] Preferably, the exhaust gas treatment mechanism comprises an activated carbon filter installed inside the exhaust gas purification box for adsorbing exhaust gas, an electrostatic precipitator installed inside the exhaust gas purification box for efficiently capturing residual fine tar droplets, a spray assembly installed inside the exhaust gas purification box for spraying exhaust gas, a small-pore filter installed inside the exhaust gas purification box, a large-pore filter installed inside the exhaust gas purification box, and a detachable door installed on the surface of the exhaust gas purification box.

[0012] Preferably, the feeding and ignition mechanism includes a feeding box disposed on the surface of the biomass combustion furnace body and communicating with the biomass combustion furnace body for feeding, a feeder disposed inside the feeding box for conveying straw charcoal, a motor body disposed on the surface of the feeding box for driving the feeder to rotate, a shaft disposed at the output end of the motor body, and an igniter disposed on the surface of the biomass combustion furnace body for ignition.

[0013] Preferably, the high-efficiency combustion mechanism includes a gasification secondary air supply pipe disposed on the surface of the biomass combustion furnace body, a third fan disposed inside the furnace chamber for air intake, an air inlet pipe disposed at the output end of the third fan for air intake into the gasification secondary air supply pipe and the air supply system of the biomass combustion furnace body, a second fan disposed inside the furnace chamber, and a pyrolysis gas conveying pipe disposed at the input end of the second fan.

[0014] Compared with existing technologies, the beneficial effects of this invention are as follows: This mobile straw high-temperature baking and micro-carbonization in-situ return-to-field device solves the problems mentioned in the background technology through high-temperature baking and micro-carbonization. This technology differs from deep pyrolysis, which pursues high carbon content; it selects a mild condition of 300-400°C for rapid heat treatment of straw. This technical approach has the following significant advantages: First, it has a fast reaction speed and high processing efficiency, enabling rapid processing that matches field operations; second, while rapidly killing insect eggs and pathogens and achieving harmlessness, it retains most of the nitrogen, phosphorus, potassium, and other nutrients in the straw; third, through the micro-carbonization process, a certain porous structure can be initially formed, giving it both the adsorption properties of biochar and the nutritional properties of straw fertilizer. Returning this carbon-based fertilizer to the field not only helps retain water and moisture and slows down fertilizer release, but also effectively adsorbs heavy metals in the soil, which is of great significance for comprehensively improving soil and arable land quality.

[0015] In view of this, the present invention aims to provide a mobile straw high-temperature baking and micro-carbonization in-situ return device, which solves the problems of high processing cost, low in-situ processing efficiency in the field, insufficient heat utilization and non-compliance of exhaust gas emissions in the existing technology by integrating high-temperature baking and micro-carbonization technology, so as to realize the efficient, clean and high-value in-situ return of straw to the field. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0018] Figure 3 This is a top view cross-sectional structural diagram of the present invention;

[0019] Figure 4 For the present invention Figure 2 Enlarged structural schematic diagram of the central part of the main view section;

[0020] Figure 5 For the present invention Figure 2 Enlarged schematic diagram of the middle section;

[0021] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Furnace chamber; 101. Baffle gate; 10. Drum body; 11. Electrical control system; 12. Exhaust gas purification box; 13. Feed hopper; 14. Traction frame; 141. Stud; 15. Drive motor; 16. Small gear disc; 17. Exhaust pipe; 18. Drum front end; 19. Large gear disc; 110. Insulation layer; 111. Lifting plate; 112. Drum rear end; 113. Heating pipe; 114. Biomass combustion furnace feed inlet; 115. Drum rear support; 116. Ash outlet; 117. Biomass combustion furnace body; 118. Drum front support; 119. First blower; 120. 1. Connecting pipe; 121. Charcoal discharge auger; 123. Charcoal storage box; 124. Straw charcoal spreading system; 125. Charcoal discharge pipe; 126. Grate; 2. Waste gas treatment mechanism; 21. Activated carbon filter; 22. Electrostatic precipitator for tar; 23. Spray assembly; 24. Small-pore filter screen; 25. Large-pore filter screen; 26. Door body; 3. Feeding and ignition mechanism; 31. Ignition device; 32. Feeder; 33. Feed box; 34. Motor body; 35. Shaft body; 4. High-efficiency combustion mechanism; 41. Pyrolysis gas conveying pipeline; 42. Secondary fan; 43. Gasification secondary air supply pipe; 44. Air inlet pipe; 45. Third fan. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. In addition, the terms "first," "second," "third," "upper," "lower," "left," "right," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. At the same time, in the description of the present invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The structure of the mobile straw high-temperature baking and micro-carbonization in-situ return device provided by this invention is as follows: Figures 1 to 5As shown, the device includes a furnace chamber 1. An electrical control system 11 is mounted on the surface of the furnace chamber 1. A tail gas purification box 12 is mounted on the surface of the furnace chamber 1 near the electrical control system 11. An exhaust pipe 17 for exhausting is mounted on the top surface of the tail gas purification box 12. An insulation layer 110 for heat preservation is installed on the inner wall of the furnace chamber 1. A traction frame 14 is mounted on the surfaces of the electrical control system 11 and the tail gas purification box 12. The traction frame 14 is connected to the collecting and crushing machine by a stud 141. A roller is installed inside the furnace chamber 1. The main body 10 has a certain inclination, with the front higher than the back. Multiple sets of lifting plates 111 with inclination angles are arrayed on the inner wall of the main body 10. The inner wall of one side of the furnace 1 is equipped with a front end head 18 of the drum. A feed hopper 13 is fixedly installed on the upper part of the front end head 18. The top of the feed hopper 13 extends to the top of the furnace 1. The bottom end of the feed hopper 13 is connected to the front end head 18 of the drum for feeding material into the drum body 10. The front end head 18 of the drum itself does not rotate and is dynamically sealed with the drum body 10.

[0025] A rear end head 112 of the drum is installed on the inner wall of the furnace chamber 1 on the side away from the front end head 18 of the drum. The rear end head 112 of the drum itself does not rotate and has a dynamic seal with the drum body 10. A drive motor 15 is installed on the inner wall of the furnace chamber 1. The model of the drive motor 15 can be LA series. The input end of the drive motor 15 is electrically connected to the output end of the electrical control system 11. A small gear 16 is installed on the output end of the drive motor 15 through a coupling and a rotating shaft. A large gear 19 is fitted on the surface of the drum body 10. The large gear 19 and the small gear 16 mesh with each other to drive the drum body 10 to rotate inside the furnace chamber 1. A front support 118 and a rear support 115 of the drum are installed on the inner wall of the furnace chamber 1. The front support 118 and the rear support 115 of the drum are responsible for bearing the weight of the drum body 10 and restricting the drum body 10 to prevent the drum body 10 from falling off during vehicle transportation.

[0026] The inner wall of the furnace chamber 1 is equipped with a biomass combustion furnace body 117, and a grate 126 is installed on the inner wall of the biomass combustion furnace body 117. The surface of the biomass combustion furnace body 117 is provided with an ash outlet 116 for direct ash removal. Two sets of baffles 101 are symmetrically arranged on the two sides of the furnace chamber 1. The baffles 101 are used to block the ash outlet 116. A heating pipe 113 is installed on the surface of the biomass combustion furnace body 117. One end of the heating pipe 113 passes through the rear end head 112 of the drum and extends into the interior of the drum body 10 to transport the heat inside the biomass combustion furnace body 117 to the interior of the drum body 10.

[0027] The surface of the rear end head 112 of the drum is provided with a biomass combustion furnace inlet 114 for discharging material. A first blower 119 for extracting exhaust gas from the furnace 1 of the device is installed inside the drum body 10. This first blower 119 can be a Y-series model. The input end of the first blower 119 is electrically connected to the output end of the electrical control system 11. A connecting pipe 120 is installed at the input end of the first blower 119, with one end extending into the exhaust gas purification box 12. The furnace is equipped with a carbon discharge pipe 125 for discharging carbon. The carbon discharge pipe 125 is connected to the lower end of the rear end head 112 of the drum. A carbon storage box 123 is installed on the surface of the bottom of the furnace 1. The carbon storage box 123 is filled with cooling water. The straw carbon discharged from the carbon discharge pipe 125 enters the carbon storage box 123 and is cooled by the cooling water inside the carbon storage box 123. A straw carbon spreading system 124 is installed on the surface of the furnace 1. A carbon discharge auger 121 is installed inside the carbon storage box 123.

[0028] Furthermore, such as Figure 2 , Figure 5 and Figure 6 As shown, a feeding and ignition mechanism 3 is provided on the surface of the biomass combustion furnace body 117. The feeding and ignition mechanism 3 includes a feeding box 33 disposed on the surface of the biomass combustion furnace body 117 and communicating with the biomass combustion furnace body 117 for feeding; a feeder 32 disposed inside the feeding box 33 for conveying straw charcoal; a motor body 34 disposed on the surface of the feeding box 33 for driving the feeder 32 to rotate; a shaft 35 disposed at the output end of the motor body 34; and an igniter 31 disposed on the surface of the biomass combustion furnace body 117 for ignition. A feeding mechanism is installed on the surface of the biomass combustion furnace body 117. The feed box 33 has a rotating feeder 32 inside. A motor body 34 is mounted on the surface of the feed box 33. The motor body 34 can be of the JO series. The input end of the motor body 34 is electrically connected to the output end of the electrical control system 11. The output end of the motor body 34 is mounted with a shaft 35 through a coupling. One end of the shaft 35 extends into the interior of the feed box 33 and is fixed to the surface of one end of the feeder 32. An igniter 31 for ignition is mounted on the surface of the biomass combustion furnace body 117 by screws. The igniter 31 is electrically connected to the electrical control system 11.

[0029] During implementation, the heat generated during combustion inside the biomass combustion furnace body 117 is transported to the interior of the drum body 10 through the heating pipe 113, increasing the heat for the combustion of straw inside the drum body 10. When the straw char formed during combustion inside the drum body 10 enters the interior of the feed box 33 through the biomass combustion furnace inlet 114, the electrical control system 11 controls the motor body 34 to work. Under the action of the motor body 34, the shaft 35 is driven to rotate. When the shaft 35 rotates, it drives the feeder 32 to rotate inside the feed box 33, feeding the straw char that enters the feed box 33. After the straw char enters the interior of the biomass combustion furnace body 117, the igniter 31 is turned on to ignite it.

[0030] Furthermore, such as Figure 2 and Figure 5 As shown, the furnace 1 of the device is equipped with a high-efficiency combustion mechanism 4. The high-efficiency combustion mechanism 4 includes a gasification secondary air supply pipe 43 installed on the surface of the biomass combustion furnace body 117, a third fan 45 installed inside the furnace 1 for air intake, an air inlet pipe 44 installed at the output end of the third fan 45 for air intake into the gasification secondary air supply pipe 43 and the air supply system of the biomass combustion furnace body 117, a second fan 42 installed inside the furnace 1, and a pyrolysis gas conveying pipe 41 installed at the input end of the second fan 42.

[0031] A third blower 45 is installed inside the furnace 1 of the device. The input end of the third blower 45 is electrically connected to the output end of the electrical control system 11. An air inlet pipe 44 is installed at the output end of the third blower 45. One end of the air inlet pipe 44 extends into the air supply system of the biomass combustion furnace body 117 and the interior of the gasification secondary air supply pipe 43. A second blower 42 is installed inside the furnace 1 of the device. The input end of the second blower 42 is electrically connected to the output end of the electrical control system 11. A pyrolysis gas conveying pipe 41 is installed on the surface of the second blower 42. One end of the pyrolysis gas conveying pipe 41 extends into the interior of the gasification secondary air supply pipe 43. The other end of the pyrolysis gas conveying pipe 41 passes through the front end head 18 of the drum and extends into the interior of the drum body 10. The second blower 42 is used to transport the pyrolysis gas in the drum body 10 to the gasification secondary air supply pipe 43 for combustion. At the same time, it also absorbs the flame heat in the biomass combustion furnace body 117 into the drum body 10 to heat the straw.

[0032] During implementation, by setting up a high-efficiency combustion mechanism, the straw can be rapidly micro-carbonized, making full use of the heat.

[0033] Furthermore, such as Figure 2 and Figure 4As shown, the exhaust gas purification box 12 is equipped with an exhaust gas treatment mechanism 2. The exhaust gas treatment mechanism 2 consists of an activated carbon filter 21 installed inside the exhaust gas purification box 12 for adsorbing exhaust gas, an electrostatic precipitator 22 installed inside the exhaust gas purification box 12 for efficiently capturing residual fine tar droplets, a spray assembly 23 installed inside the exhaust gas purification box 12 for spraying exhaust gas, a small-pore filter 24 installed inside the exhaust gas purification box 12, a large-pore filter 25 installed inside the exhaust gas purification box 12, and a detachable door 26 installed on the surface of the exhaust gas purification box 12.

[0034] The exhaust gas purification box 12 is equipped with a large-pore filter screen 25. A small-pore filter screen 24 is installed on the inner wall of the exhaust gas purification box 12 above the large-pore filter screen 25. A spray assembly 23 is installed inside the exhaust gas purification box 12 above the small-pore filter screen 24. An electrostatic precipitator 22 is bolted to the inside of the exhaust gas purification box 12 above the spray assembly 23. An activated carbon filter 21 is bolted to the inside of the exhaust gas purification box 12 above the electrostatic precipitator 22. A detachable door 26 is screwed to the surface of the exhaust gas purification box 12.

[0035] During implementation, by setting up an exhaust gas treatment mechanism, the exhaust gas discharged from the furnace 1 of the device can be thoroughly purified to achieve harmless and smokeless emission.

[0036] This invention provides an effective solution through high-temperature baking and micro-carbonization technology. Unlike deep pyrolysis, which pursues high carbon content, this technology opts for rapid heat treatment of straw under mild conditions of 300-400°C. This technical approach has the following significant advantages: First, it offers rapid reaction speed and high processing efficiency, enabling rapid processing that matches field operations; second, while quickly killing insect eggs and pathogens and achieving harmlessness, it retains most of the nitrogen, phosphorus, potassium, and other nutrients in the straw; third, through the micro-carbonization process, a certain porous structure is initially formed, giving it both the adsorption properties of biochar and the nutritional value of straw fertilizer. Returning this carbon-based fertilizer to the field not only helps retain moisture and slow-release fertilizer, but also effectively adsorbs heavy metals in the soil, which is of great significance for comprehensively improving soil and arable land quality.

[0037] In view of this, the present invention aims to provide a mobile straw high-temperature baking and micro-carbonization in-situ return device, which solves the problems of high processing cost, low in-situ processing efficiency in the field, insufficient heat utilization and non-compliance of exhaust gas emissions in the existing technology by integrating high-temperature baking and micro-carbonization technology, so as to realize the efficient, clean and high-value in-situ return of straw to the field.

[0038] Working principle: In use, first push the furnace 1 of the device to the designated position of the external collecting and crushing machine, and connect the collecting and crushing machine and the traction frame 14 by tightening the stud 141. The collecting and crushing machine guides the collected and crushed straw into the inside of the drum body 10 through the feed hopper 13 and the front end head 18 of the drum. The electrical control system 11 controls the drive motor 15 to work. Under the action of the drive motor 15, the small gear 16 is driven to rotate. Under the meshing action of the small gear 16 and the large gear 19, the drum body 10 is driven to rotate inside the furnace 1 of the device. When the drum body 10 rotates, there is a dynamic seal between the drum body 10, the front end head 18 of the drum, and the rear end head 112 of the drum. The material is lifted by the lifting plate 111 inside the drum body 10. The drum body 10 should have a certain degree of inclination, with the front higher than the back. The lifting plate 111 has an inclination angle, which can improve the lifting effect of straw.

[0039] The char falling from the char outlet pipe 125 preferentially enters the biomass combustion furnace body 117. Unused char from the biomass combustion furnace body 117 falls from the char outlet pipe 125 into the lower char storage box 123. After being cooled by the cooling water inside the char storage box 123, it is discharged and returned to the field through the straw char spreading system 124 and the char outlet auger 121. Under the joint action of the rear support 115 and the front support 118 of the drum, it is responsible for bearing the weight of the drum body 10 and restricting the drum body 10 to prevent it from falling off during vehicle transportation.

[0040] The heat generated during combustion inside the biomass combustion furnace body 117 is transported to the interior of the drum body 10 via the heating pipe 113, increasing the heat for the combustion of straw inside the drum body 10. When the charcoal formed from the combustion inside the drum body 10 enters the feed box 33 through the biomass combustion furnace inlet 114, the electrical control system 11 controls the motor body 34 to operate. Under the action of the motor body 34, the shaft 35 rotates. When the shaft 35 rotates, it drives the feeder 32 to rotate inside the feed box 33, feeding the charcoal into the feed box 33. After the charcoal enters the biomass combustion furnace body 117, the igniter 31 is activated for ignition. Since the ash outlets 116 are located on both sides of the biomass combustion furnace body 117, the operator can directly clean the ash through the ash outlets 116 after removing the baffle 101. The specific structure and working principle of the igniter 31 are existing technologies.

[0041] Subsequently, air is delivered to the air supply system of the biomass combustion furnace body 117 and the gasification secondary air supply pipe 43 via the third fan 45. The gasified gas generated by the biomass combustion furnace body 117 is subjected to secondary air supply and combustion in the gasification secondary air supply pipe 43. The pyrolysis gas in the drum body 10 is transported to the gasification secondary air supply pipe 43 for combustion by the second fan 42 and the pyrolysis gas conveying pipe 41. At the same time, the heat of the flame in the biomass combustion furnace body 117 is also absorbed into the drum body 10 to heat the straw. It should be noted that the air volume should not be too large to avoid backflow of the flame in the gasification pipe, so as to achieve the efficient combustion function of the in-situ return device. This allows the in-situ return device to achieve rapid micro-carbonization of straw and make full use of heat.

[0042] Subsequently, the electrical control system 11 controls the first fan 119 and the connecting pipe 120 to operate, drawing the high-temperature exhaust gas from the furnace 1 into the exhaust gas purification box 12. Under the action of the large-pore filter 25 and the small-pore filter 24, the high-temperature exhaust gas is adsorbed and filtered. Then, the electrical control system 11 controls the nozzles on the surface of the spray assembly 23 to open, washing and spraying the high-temperature exhaust gas entering the exhaust gas purification box 12. The high-temperature exhaust gas first enters the exhaust gas purification box 12 for... The process involves dust removal and cooling, while simultaneously condensing and washing away most of the tar. Subsequently, the sprayed exhaust gas enters the electrostatic precipitator 22, where high-voltage electrostatic action efficiently captures the remaining fine tar droplets. Finally, the exhaust gas is adsorbed by the activated carbon filter 21 and discharged into the exhaust gas purification box 12 through the exhaust pipe 17, achieving the final clean emission of the exhaust gas. This enables the in-situ return-to-field device to treat exhaust gas, thus ensuring that the exhaust gas discharged from the furnace 1 of the device can be thoroughly purified during use, achieving harmless and smokeless emission.

[0043] The spray assembly 23 consists of components such as an inlet pipe and a nozzle. The specific composition and working principle of the spray assembly 23 and the electrostatic tar remover 22 are existing technologies and will not be elaborated here. High-temperature baking and micro-carbonization technology is used to achieve rapid micro-carbonization of straw. It does not pursue a high carbonization effect. At 300-400 degrees Celsius, it achieves rapid insecticidal and bactericidal effects and slight carbonization of straw. On the one hand, it can moderately carbonize and improve the pore structure, and on the other hand, it can preserve the nutrients of straw. After being directly returned to the field, it can promote plant growth and finally complete the use of the in-situ return device.

[0044] The heating method of this invention is that the flame of the biomass combustion furnace body 117 is directly sprayed onto the outside of the drum body 10 for heating. The high-temperature hot air of the biomass combustion furnace body 117 is drawn into the drum body 10 for drying. This is one heating method, which is the method of this invention. According to the prior art, there is another method, in which the combustion nozzle of the biomass combustion furnace body 117 is directly directed towards the inside of the drum body 10. In this way, the flame directly enters the inside of the drum body 10. It is okay if some straw inside the drum body 10 is burned. The point is to make the processing speed fast. In the end, the ash and partially carbonized straw charcoal will fall into the cooling water inside the charcoal storage box 123. This method has a higher processing efficiency.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mobile straw high-temperature baking and micro-carbonization in-situ return-to-field device, comprising a furnace chamber (1), characterized in that: An electrical control system (11) is installed on the surface of the furnace chamber (1) of the device. A tail gas purification box (12) is installed on the surface of the furnace chamber (1) near the electrical control system (11). A roller body (10) is installed inside the furnace chamber (1). The roller body (10) has a certain inclination, with the front higher than the back. Multiple sets of lifting plates (111) with inclination angles are arrayed on the inner wall of the roller body (10). A roller front end head (18) is installed on the inner wall of one side of the furnace chamber (1). (1) A rear end head (112) of a drum is installed on the inner wall away from the front end head (18) of the drum. A biomass combustion furnace body (117) is installed on the inner wall of the furnace (1) of the device. A biomass combustion furnace inlet (114) for discharging material is opened on the surface of the rear end head (112). A feeding and ignition mechanism (3) is provided on the surface of the biomass combustion furnace body (117). A high-efficiency combustion mechanism (4) is provided inside the furnace (1) of the device. A waste gas treatment mechanism (2) is provided inside the exhaust gas purification box (12).

2. The mobile straw high-temperature baking and micro-carbonization in-situ return device according to claim 1, characterized in that: An exhaust pipe (17) for exhaust is installed on the surface of the top position of the exhaust gas purification box (12). An insulation layer (110) for heat preservation is installed on the inner wall of the furnace (1) of the device. A traction frame (14) is installed on the surface of the electrical control system (11) and the exhaust gas purification box (12). The traction frame (14) is connected to the collection crusher through a stud (141). A feed hopper (13) is fixedly installed on the upper part of the front end head (18) of the drum. The top of the feed hopper (13) extends to the top of the furnace (1) of the device. The bottom end of the feed hopper (13) is connected to the front end head (18) of the drum for feeding into the drum body (10). The front end head (18) of the drum itself does not rotate and is dynamically sealed with the drum body (10).

3. The mobile straw high-temperature baking and micro-carbonization in-situ return device according to claim 1, characterized in that: The rear end head (112) of the roller does not rotate and is dynamically sealed with the roller body (10). A drive motor (15) is installed on the inner wall of the furnace chamber (1) of the device. A small gear plate (16) is installed on the output end of the drive motor (15) through a coupling and a rotating shaft. A large gear plate (19) is fitted on the surface of the roller body (10). The large gear plate (19) and the small gear plate (16) mesh with each other to drive the roller body (10) to rotate inside the furnace chamber (1) of the device. A front roller support (118) and a rear roller support (115) are respectively installed on the inner wall of the furnace chamber (1). The front roller support (118) and the rear roller support (115) are responsible for bearing the weight of the roller body (10) and restricting the roller body (10) to prevent the roller body (10) from falling off during vehicle transportation.

4. The mobile straw high-temperature baking and micro-carbonization in-situ return device according to claim 1, characterized in that: The inner wall of the biomass combustion furnace body (117) is equipped with a grate (126). The surface of the biomass combustion furnace body (117) is provided with an ash outlet (116) for direct ash removal. Two sets of baffles (101) are symmetrically arranged on the surfaces of the furnace chamber (1) of the device. The baffles (101) are used to block the ash outlet (116). The surface of the biomass combustion furnace body (117) is equipped with a heating pipe (113). One end of the heating pipe (113) passes through the rear end head (112) of the drum and extends into the interior of the drum body (10) to transport the heat inside the biomass combustion furnace body (117) to the interior of the drum body (10).

5. The mobile straw high-temperature baking and micro-carbonization in-situ return device according to claim 1, characterized in that: The drum body (10) is equipped with a first fan (119) for pumping exhaust gas from the furnace (1) of the device. The input end of the first fan (119) is equipped with a connecting pipe (120). One end of the connecting pipe (120) extends into the exhaust gas purification box (12). The furnace (1) of the device is equipped with a carbon discharge pipe (125) for carbon discharge. The carbon discharge pipe (125) is connected to the lower end of the rear end head (112) of the drum. A carbon storage box (123) is installed on the surface of the bottom of the furnace (1). The carbon storage box (123) is filled with cooling water. The straw charcoal discharged from the carbon discharge pipe (125) enters the carbon storage box (123) and is cooled by the cooling water inside the carbon storage box (123). A straw charcoal scattering system (124) is installed on the surface of the furnace (1). A carbon discharge auger (121) is installed inside the carbon storage box (123).

6. The mobile straw high-temperature baking and micro-carbonization in-situ return-to-field device according to claim 1, characterized in that: The exhaust gas treatment mechanism (2) consists of an activated carbon filter (21) installed inside the exhaust gas purification box (12) for adsorbing exhaust gas, an electrostatic precipitator (22) installed inside the exhaust gas purification box (12) for efficiently capturing residual fine tar droplets, a spray assembly (23) installed inside the exhaust gas purification box (12) for spraying exhaust gas, a small-hole filter (24) installed inside the exhaust gas purification box (12), a large-hole filter (25) installed inside the exhaust gas purification box (12), and a detachable door (26) installed on the surface of the exhaust gas purification box (12).

7. The mobile straw high-temperature baking and micro-carbonization in-situ return device according to claim 1, characterized in that: The feeding and ignition mechanism (3) includes a feeding box (33) disposed on the surface of the biomass combustion furnace body (117) and connected to the biomass combustion furnace body (117) for feeding, a feeder (32) disposed inside the feeding box (33) for feeding straw charcoal, a motor body (34) disposed on the surface of the feeding box (33) for driving the feeder (32) to rotate, a shaft (35) disposed at the output end of the motor body (34), and an igniter (31) disposed on the surface of the biomass combustion furnace body (117) for ignition.

8. The mobile straw high-temperature baking and micro-carbonization in-situ return device according to claim 1, characterized in that: The high-efficiency combustion mechanism (4) includes a gasification secondary air supply pipe (43) disposed on the surface of the biomass combustion furnace body (117), a third fan (45) disposed inside the furnace (1) of the device for air intake, an air inlet pipe (44) disposed at the output end of the third fan (45) for air intake into the gasification secondary air supply pipe (43) and the air supply system of the biomass combustion furnace body (117), a second fan (42) disposed inside the furnace (1) of the device, and a pyrolysis gas conveying pipe (41) disposed at the input end of the second fan (42).

Images